calling ConTeXt as a background process

calling ConTeXt as a background process

[Henning Hraban Ramm]

Hi together!

I'm trying since about a week to get ConTeXt running as a background  
process of a web application.
It's always hanging, and I get no log.

"ps axef" shows the call stack:

  \_ /var/www/xxx/bin/python /var/www/xxx/releases/current/cerebrale/ 
manage.py runfcgi method=threaded ...
     \_ /bin/sh -c cd /var/www/xxx/_textemp && /var/opt/context/tex/ 
texmf-linux-64/bin/context ...
         \_ /bin/sh /var/opt/context/tex/texmf-linux-64/bin/context -- 
purgeall --batchmode --result=/var/www/xxx/_textemp/xxx.pdf
             \_ texlua /var/opt/context/tex/texmf-linux-64/bin/mtxrun  
--script context --purgeall --batchmode --result=/ ...
                 \_ [uname] <defunct>

I.e. it looks like texlua calls uname in a way that lets the process  
hang forever.
If I call the same from an active shell everything runs fine. Also  
uname alone works in the shell command.
Any ideas what I could/should check?

I don't think it could be the PATH, since ConTeXt's bin as well as all  
the system tools are in:
PATH=/var/opt/context/tex/texmf-linux-64/bin:/var/www/cerebrale/bin:/ 
command:/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/ 
usr/X11R6/bin
TEXMFOS=/var/opt/context/tex/texmf-linux-64
TEXROOT=/var/opt/context/tex

The user that runs the server process (incl. sub-shell and ConTeXt)  
owns all the TeX files and the directory.

Maybe it's a Python problem, here's my call:
subprocess.Popen(cmd.encode('utf-8'), shell=True, stderr=logfile,  
stdout=logfile)

But I can call several other commands in this way without problems.
The whole thing (incl. ConTeXt) works on my Mac (OSX 10.5.8) at home.
Everything I call before ConTeXt shows up in the logfile.


Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 09:06 schrieb Henning Hraban Ramm:

> Hi together!
>
> I'm trying since about a week to get ConTeXt running as a background  
> process of a web application.
> It's always hanging, and I get no log.
>
> "ps axef" shows the call stack:
>
> \_ /var/www/xxx/bin/python /var/www/xxx/releases/current/cerebrale/ 
> manage.py runfcgi method=threaded ...
>    \_ /bin/sh -c cd /var/www/xxx/_textemp && /var/opt/context/tex/ 
> texmf-linux-64/bin/context ...
>        \_ /bin/sh /var/opt/context/tex/texmf-linux-64/bin/context -- 
> purgeall --batchmode --result=/var/www/xxx/_textemp/xxx.pdf
>            \_ texlua /var/opt/context/tex/texmf-linux-64/bin/mtxrun  
> --script context --purgeall --batchmode --result=/ ...
>                \_ [uname] <defunct>
>
> I.e. it looks like texlua calls uname in a way that lets the process  
> hang forever.
> If I call the same from an active shell everything runs fine. Also  
> uname alone works in the shell command.
> Any ideas what I could/should check?
>
> I don't think it could be the PATH, since ConTeXt's bin as well as  
> all the system tools are in:
> PATH=/var/opt/context/tex/texmf-linux-64/bin:/var/www/cerebrale/bin:/ 
> command:/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/ 
> sbin:/usr/X11R6/bin
> TEXMFOS=/var/opt/context/tex/texmf-linux-64
> TEXROOT=/var/opt/context/tex
>
> The user that runs the server process (incl. sub-shell and ConTeXt)  
> owns all the TeX files and the directory.
>
> Maybe it's a Python problem, here's my call:
> subprocess.Popen(cmd.encode('utf-8'), shell=True, stderr=logfile,  
> stdout=logfile)
>
> But I can call several other commands in this way without problems.
> The whole thing (incl. ConTeXt) works on my Mac (OSX 10.5.8) at home.
> Everything I call before ConTeXt shows up in the logfile.

I tried to call mtxrun directly and replaced the calls to uname -m  
with their return value (x86_64).
Now the texlua process itself hangs, even if not "defunct" it doesn't  
do anything:

\_ /var/www/xxx/bin/python /var/www/xxx/releases/current/cerebrale/ 
manage.py runfcgi method=threaded ...
     \_ /bin/sh -c cd /var/www/xxx/_textemp && mtxrun --script context  
"prd_paket --batchmode --once" PATH=/var/opt/context/tex/texmf- 
linux-64/bin:/var/www/xxx/bin:...
         \_ texlua /var/opt/context/tex/texmf-linux-64/bin/mtxrun -- 
script context prd_paket --batchmode --once TEXMFOS=/var/opt/context/ 
tex/texmf-linux-64 VIRTUAL_ENV=/var/www/xxx PATH=/var/opt/context/tex/ 
texmf-linux-64/bin:...

Help?

Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Taco Hoekwater]

On 10/07/10 09:34, Henning Hraban Ramm wrote:
> mtxrun --script context "prd_paket --batchmode --once"

When I run that last thing on the command line, I get:

  ! I can't find file `./prd_paket --batchmode --once'.
  <*> "./prd_paket --batchmode --once"

  Please type another input file name:

But it is hard to say whether that is the problem. If it was
me, I would attach a gdb to the process to see where it is at
from the backtrace (but you need a non-stripped build of
the binary for that).

Best wishes,
Taco
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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 10:42 schrieb Taco Hoekwater:

> On 10/07/10 09:34, Henning Hraban Ramm wrote:
>> mtxrun --script context "prd_paket --batchmode --once"
>
> When I run that last thing on the command line, I get:
>
>  ! I can't find file `./prd_paket --batchmode --once'.
>  <*> "./prd_paket --batchmode --once"
>
>  Please type another input file name:

Of course, prd_paket.tex is my input file. But that's there.

> But it is hard to say whether that is the problem. If it was
> me, I would attach a gdb to the process to see where it is at
> from the backtrace (but you need a non-stripped build of
> the binary for that).

I'd like to avoid compiling a debugging version of luatex...

I guess the problem isn't luatex itself, but the probably somehow  
restricted environment.

How's ConTeXt called in ConTeXtgarden Live? Any special means?


Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Taco Hoekwater]

On 10/07/10 11:00, Henning Hraban Ramm wrote:
> Am 2010-10-07 um 10:42 schrieb Taco Hoekwater:
> 
>> On 10/07/10 09:34, Henning Hraban Ramm wrote:
>>> mtxrun --script context "prd_paket --batchmode --once"
>>
>> When I run that last thing on the command line, I get:
>>
>>  ! I can't find file `./prd_paket --batchmode --once'.
>>  <*> "./prd_paket --batchmode --once"
>>
>>  Please type another input file name:
> 
> Of course, prd_paket.tex is my input file. But that's there.

Your shell quotes were off. It is looking for

  "./prd_paket --batchmode --once.tex"

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 11:06 schrieb Taco Hoekwater:
>> Of course, prd_paket.tex is my input file. But that's there.
>
> Your shell quotes were off. It is looking for
>
>  "./prd_paket --batchmode --once.tex"

Ok, but it doesn't work with any other call of luatex - I also tried  
to start another shell script that calls luatex, but it hangs in the  
same manner. If I kill the luatex process, further commands work.

I found a lot of examples where people call other programs from Django  
in the same way as I tried with LuaTeX (i.e. without additional shell  
script), so my call isn't probably too wrong.

Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 12:54 schrieb Florian Wobbe:

> On Oct 7, 2010, at 12:19 , Henning Hraban Ramm wrote:
>
>> Am 2010-10-07 um 11:06 schrieb Taco Hoekwater:
>>>> Of course, prd_paket.tex is my input file. But that's there.
>>>
>>> Your shell quotes were off. It is looking for
>>>
>>> "./prd_paket --batchmode --once.tex"
>>
>> Ok, but it doesn't work with any other call of luatex - I also  
>> tried to start another shell script that calls luatex, but it hangs  
>> in the same manner. If I kill the luatex process, further commands  
>> work.
>
> could you send me the calling shell script along with all necessary  
> files to run the context batch? or supply a minimal example instead  
> of prd_paket.tex.

Hi Florian,

it doesn't depend on the tex file, it's the same with

\starttext
Hello World!
\stoptext

It also doesn't depend on context options (--batchmode etc.)

And it doesn't seem to depend on the way of calling it from Python/ 
Django:
- directly with subprocess.Popen (several options), subprocess.call,  
subprocess.check_call
- indirectly via shell script (that contains just the context call)
- with context or mtxrun (didn't try texlua directly yet)
- with setuptex or setting TEXROOT and TEXMFOS directly (in the  
environment for the subprocess call)

I can imagine that it has something to do with SElinux settings,  
didn't dive in that yet.

I can call context manually as the same user that's running the server  
process with all the options.

It also works on my test system (osx-intel) with Django's dev server,  
just not on my Ubuntu server (linux-64).


Despairing greetlings,
Hraban
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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Florian Wobbe]

> Am 2010-10-07 um 12:54 schrieb Florian Wobbe:
> 
>> On Oct 7, 2010, at 12:19 , Henning Hraban Ramm wrote:
>> 
>>> Am 2010-10-07 um 11:06 schrieb Taco Hoekwater:
>>>>> Of course, prd_paket.tex is my input file. But that's there.
>>>> 
>>>> Your shell quotes were off. It is looking for
>>>> 
>>>> "./prd_paket --batchmode --once.tex"
>>> 
>>> Ok, but it doesn't work with any other call of luatex - I also tried to start another shell script that calls luatex, but it hangs in the same manner. If I kill the luatex process, further commands work.
>> 
>> could you send me the calling shell script along with all necessary files to run the context batch? or supply a minimal example instead of prd_paket.tex.
> 
> Hi Florian,
> 
> it doesn't depend on the tex file, it's the same with
> 
> \starttext
> Hello World!
> \stoptext
> 
> It also doesn't depend on context options (--batchmode etc.)
> 
> And it doesn't seem to depend on the way of calling it from Python/Django:
> - directly with subprocess.Popen (several options), subprocess.call, subprocess.check_call
> - indirectly via shell script (that contains just the context call)
> - with context or mtxrun (didn't try texlua directly yet)
> - with setuptex or setting TEXROOT and TEXMFOS directly (in the environment for the subprocess call)
> 
> I can imagine that it has something to do with SElinux settings, didn't dive in that yet.
> 
> I can call context manually as the same user that's running the server process with all the options.
> 
> It also works on my test system (osx-intel) with Django's dev server, just not on my Ubuntu server (linux-64).

Well, remote sensing with computers is cumbersome and as I haven't got a clue what happens on your machine I'd rather see your the shell script. How is this script intended to be called: as a subshell from the prompt, as a cron job in the background, ...? I've got Ubunto and OSX here and could try to reproduce the error for you, if you post your script.

A shell script with just these 4 lines

 #!/bin/bash
 cd $HOME/context/tests
 export PATH=$PATH:$HOME/applic/context/tex/texmf-linux-64/bin
 context --batchmode test.tex

works as expected on Ubunto 2.6.32-24-server x86_64 with an almost empty environment (none of the TEX* variables set). You just have to set the path to context - nothing else is necessary.

As for the environment variables set: you can test for that in the script via 'env' and redirect the output to a file.

Cheers,
Florian


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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 18:32 schrieb Florian Wobbe:
> Well, remote sensing with computers is cumbersome and as I haven't  
> got a clue what happens on your machine I'd rather see your the  
> shell script.

Don't keep fixed on that shell script - it was only one of many failed  
attempts. "context" itself is only a shell script that calls mtxrun.  
It doesn't matter how I call ConTeXt from the server process - it  
hangs at texlua.

> How is this script intended to be called: as a subshell from the  
> prompt, as a cron job in the background, ...?

At the end I want to run it via Celery/RabbitMQ (an AMQP message  
queue), but since that's another complication, I tried first to run it  
directly from my Django view (in other framework's talk that's the  
controller).


> I've got Ubunto and OSX here and could try to reproduce the error  
> for you, if you post your script.

Thank you, but the problem is most probably something in my server  
setup that doesn't fit something in LuaTeX.
As I mentioned: I got no problems calling TeX directly, just from the  
server process.

> A shell script with just these 4 lines
>
> #!/bin/bash
> cd $HOME/context/tests
> export PATH=$PATH:$HOME/applic/context/tex/texmf-linux-64/bin
> context --batchmode test.tex
>
> works as expected on Ubunto 2.6.32-24-server x86_64 with an almost  
> empty environment (none of the TEX* variables set). You just have to  
> set the path to context - nothing else is necessary.

> As for the environment variables set: you can test for that in the  
> script via 'env' and redirect the output to a file.

Guess what I tested before complaining. I redirect the whole process  
output to a log file, unfortunately I catch no message from TeX  
whatsoever, e.g. with
"set && date && context hello" I get the env settings and the date,  
but no message from context.

I'll write a summary.



Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Florian Wobbe]

On Oct 8, 2010, at 09:36 , Henning Hraban Ramm wrote:

>> I've got Ubunto and OSX here and could try to reproduce the error for you, if you post your script.
> 
> Thank you, but the problem is most probably something in my server setup that doesn't fit something in LuaTeX.
> As I mentioned: I got no problems calling TeX directly, just from the server process.

All right. I have one more suggestion. If you don't want to dive into debugging via gdb you should try another attempt at strace. Previously you posted a tracedump of context. But it only shows context (the shell script) waiting and nothing related to luatex. You may want to make strace follow forks (-f).

Florian

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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-08 um 09:59 schrieb Florian Wobbe:

>> Thank you, but the problem is most probably something in my server  
>> setup that doesn't fit something in LuaTeX.
>> As I mentioned: I got no problems calling TeX directly, just from  
>> the server process.
>
> All right. I have one more suggestion. If you don't want to dive  
> into debugging via gdb you should try another attempt at strace.  
> Previously you posted a tracedump of context. But it only shows  
> context (the shell script) waiting and nothing related to luatex.  
> You may want to make strace follow forks (-f).


Sorry, I've no experience using strace. Here we are:

This is how my process tree looked:
14025 ?        Sl     0:01      |   \_ /var/www/xxx/bin/python /var/ 
www/xxx/.../manage.py runfcgi  ...
14116 ?        S      0:00      |       \_ /bin/sh -c set >>  
_context.log && strace -f context --batchmode --once hello >>  
_context.log
14117 ?        S      0:00      |           \_ strace -f context -- 
batchmode --once hello
14118 ?        T      0:00      |               \_ /bin/sh /var/opt/ 
context/tex/texmf-linux-64/bin/context --batchmode --once hello
14119 ?        R      0:11      |                   \_ texlua /var/opt/ 
context/tex/texmf-linux-64/bin/mtxrun --script context --batchmode -- 
once hello

The logfile was empty, texlua seemed to hang. I killed 14119 and got:

execve("/var/opt/context/tex/texmf-linux-64/bin/context", ["context",  
"--batchmode", "--once", "hello"], [/* 10 vars */]) = 0
brk(0)                                  = 0x8e2e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b08959ac000
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b08959ad000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or  
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b08959af000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libncurses.so.5", O_RDONLY)  = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320% 
\1\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=256288, ...}) = 0
mmap(NULL, 2353152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2b0895bad000
mprotect(0x2b0895be8000, 2093056, PROT_NONE) = 0
mmap(0x2b0895de7000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 3, 0x3a000) = 0x2b0895de7000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libdl.so.2", O_RDONLY)       = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\20\16\0\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14616, ...}) = 0
mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2b0895dec000
mprotect(0x2b0895dee000, 2097152, PROT_NONE) = 0
mmap(0x2b0895fee000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED| 
MAP_DENYWRITE, 3, 0x2000) = 0x2b0895fee000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2b0895ff0000
mprotect(0x2b089613a000, 2093056, PROT_NONE) = 0
mmap(0x2b0896339000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x2b0896339000
mmap(0x2b089633e000, 17016, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b089633e000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b0896343000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b0896344000
arch_prctl(ARCH_SET_FS, 0x2b0896343af0) = 0
mprotect(0x2b0896339000, 12288, PROT_READ) = 0
munmap(0x2b08959af000, 20573)           = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
open("/dev/tty", O_RDWR|O_NONBLOCK)     = -1 ENXIO (No such device or  
address)
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fffd5440e70) = -1 EINVAL  
(Invalid argument)
brk(0)                                  = 0x8e2e000
brk(0x8e2f000)                          = 0x8e2f000
brk(0x8e30000)                          = 0x8e30000
getuid()                                = 1005
getgid()                                = 1006
geteuid()                               = 1005
getegid()                               = 1006
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
brk(0x8e31000)                          = 0x8e31000
open("/proc/meminfo", O_RDONLY)         = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b08959af000
read(3, "MemTotal:      2097152 kB\nMemFree"..., 4096) = 771
close(3)                                = 0
munmap(0x2b08959af000, 4096)            = 0
brk(0x8e32000)                          = 0x8e32000
rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
stat("/var/www/xxx/_textemp", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getpid()                                = 14118
getppid()                               = 14117
brk(0x8e33000)                          = 0x8e33000
socket(PF_FILE, SOCK_STREAM, 0)         = 3
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = 0
sendto(3, "\2\0\0\0\v\0\0\0\7\0\0\0passwd\0"..., 19, MSG_NOSIGNAL,  
NULL, 0) = 19
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3,  
revents=POLLIN|POLLHUP}])
recvmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"passwd\0"..., 7}, {"\270O 
\3\0\0\0\0\0"..., 8}], msg_controllen=24, {cmsg_len=20,  
cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, {4}}, msg_flags=0},  
MSG_CMSG_CLOEXEC) = 15
mmap(NULL, 217016, PROT_READ, MAP_SHARED, 4, 0) = 0x2b08959af000
close(4)                                = 0
close(3)                                = 0
brk(0x8e34000)                          = 0x8e34000
getpgrp()                               = 29995
rt_sigaction(SIGCHLD, {0x439730, [], SA_RESTORER, 0x2b0896021f60},  
{SIG_DFL}, 8) = 0
getrlimit(RLIMIT_NPROC, {rlim_cur=582*1024, rlim_max=582*1024}) = 0
brk(0x8e35000)                          = 0x8e35000
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
open("/var/opt/context/tex/texmf-linux-64/bin/context", O_RDONLY) = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fffd5440ee0) = -1 ENOTTY  
(Inappropriate ioctl for device)
lseek(3, 0, SEEK_CUR)                   = 0
read(3, "#!/bin/sh\nmtxrun --script context"..., 80) = 39
lseek(3, 0, SEEK_SET)                   = 0
getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
dup2(3, 255)                            = 255
close(3)                                = 0
fcntl(255, F_SETFD, FD_CLOEXEC)         = 0
fcntl(255, F_GETFL)                     = 0x8000 (flags O_RDONLY| 
O_LARGEFILE)
fstat(255, {st_mode=S_IFREG|0755, st_size=39, ...}) = 0
lseek(255, 0, SEEK_CUR)                 = 0
brk(0x8e36000)                          = 0x8e36000
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
read(255, "#!/bin/sh\nmtxrun --script context"..., 39) = 39
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
brk(0x8e37000)                          = 0x8e37000
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
{st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 3
read(3, "65536\n"..., 31)               = 6
close(3)                                = 0
brk(0x8eb7000)                          = 0x8eb7000
getgroups(65536, [1006])                = 1
stat("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
{st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
brk(0x8eb8000)                          = 0x8eb8000
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
clone(Process 14119 attached (waiting for parent)
Process 14119 resumed (parent 14118 ready)
child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,  
child_tidptr=0x2b0896343b80) = 14119
[pid 14119] close(255 <unfinished ...>
[pid 14118] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid 14119] <... close resumed> )       = 0
[pid 14118] <... rt_sigprocmask resumed> NULL, 8) = 0
[pid 14119] rt_sigprocmask(SIG_SETMASK, [],  <unfinished ...>
[pid 14118] rt_sigprocmask(SIG_BLOCK, [CHLD],  <unfinished ...>
[pid 14119] <... rt_sigprocmask resumed> NULL, 8) = 0
[pid 14118] <... rt_sigprocmask resumed> [], 8) = 0
[pid 14119] rt_sigaction(SIGTSTP, {SIG_DFL},  <unfinished ...>
[pid 14118] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid 14118] rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
[pid 14118] rt_sigaction(SIGINT, {0x43a340, [], SA_RESTORER,  
0x2b0896021f60}, {SIG_DFL}, 8) = 0
[pid 14118] wait4(-1, Process 14118 suspended
  <unfinished ...>
[pid 14119] <... rt_sigaction resumed> {SIG_DFL}, 8) = 0
[pid 14119] rt_sigaction(SIGTTIN, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 14119] rt_sigaction(SIGTTOU, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 14119] rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 14119] rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_IGN}, 8) = 0
[pid 14119] rt_sigaction(SIGCHLD, {SIG_DFL}, {0x439730, [],  
SA_RESTORER, 0x2b0896021f60}, 8) = 0
[pid 14119] execve("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
["mtxrun", "--script", "context", "--batchmode", "--once", "hello"], [/ 
* 10 vars */]) = 0
[pid 14119] brk(0)                      = 0x14a3b000
[pid 14119] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2ab674fdb000
[pid 14119] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 14119] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2ab674fdc000
[pid 14119] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] open("/etc/ld.so.cache", O_RDONLY) = 3
[pid 14119] fstat(3, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
[pid 14119] mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 3, 0) =  
0x2ab674fde000
[pid 14119] close(3)                    = 0
[pid 14119] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] open("/lib/libc.so.6", O_RDONLY) = 3
[pid 14119] read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
[pid 14119] fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
[pid 14119] mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 3, 0) = 0x2ab6751dc000
[pid 14119] mprotect(0x2ab675326000, 2093056, PROT_NONE) = 0
[pid 14119] mmap(0x2ab675525000, 20480, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x2ab675525000
[pid 14119] mmap(0x2ab67552a000, 17016, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2ab67552a000
[pid 14119] close(3)                    = 0
[pid 14119] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2ab67552f000
[pid 14119] arch_prctl(ARCH_SET_FS, 0x2ab67552f6e0) = 0
[pid 14119] mprotect(0x2ab675525000, 12288, PROT_READ) = 0
[pid 14119] munmap(0x2ab674fde000, 20573) = 0
[pid 14119] brk(0)                      = 0x14a3b000
[pid 14119] brk(0x14a5c000)             = 0x14a5c000
[pid 14119] execve("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
["texlua", "/var/opt/context/tex/texmf-linux"..., "--script",  
"context", "--batchmode", "--once", "hello"], [/* 10 vars */]) = 0
[pid 14119] brk(0)                      = 0xa7bf000
[pid 14119] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b76c18c6000
[pid 14119] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 14119] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b76c18c7000
[pid 14119] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] open("/etc/ld.so.cache", O_RDONLY) = 3
[pid 14119] fstat(3, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
[pid 14119] mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 3, 0) =  
0x2b76c18c9000
[pid 14119] close(3)                    = 0
[pid 14119] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] open("/lib/libdl.so.2", O_RDONLY) = 3
[pid 14119] read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\20\16\0\0\0\0\0\0@"..., 832) = 832
[pid 14119] fstat(3, {st_mode=S_IFREG|0644, st_size=14616, ...}) = 0
[pid 14119] mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 3, 0) = 0x2b76c1ac7000
[pid 14119] mprotect(0x2b76c1ac9000, 2097152, PROT_NONE) = 0
[pid 14119] mmap(0x2b76c1cc9000, 8192, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x2b76c1cc9000
[pid 14119] close(3)                    = 0
[pid 14119] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] open("/lib/libm.so.6", O_RDONLY) = 3
[pid 14119] read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P> 
\0\0\0\0\0\0@"..., 832) = 832
[pid 14119] fstat(3, {st_mode=S_IFREG|0644, st_size=534736, ...}) = 0
[pid 14119] mmap(NULL, 2629848, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 3, 0) = 0x2b76c1ccb000
[pid 14119] mprotect(0x2b76c1d4d000, 2093056, PROT_NONE) = 0
[pid 14119] mmap(0x2b76c1f4c000, 8192, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x81000) = 0x2b76c1f4c000
[pid 14119] close(3)                    = 0
[pid 14119] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 14119] open("/lib/libc.so.6", O_RDONLY) = 3
[pid 14119] read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
[pid 14119] fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
[pid 14119] mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 3, 0) = 0x2b76c1f4e000
[pid 14119] mprotect(0x2b76c2098000, 2093056, PROT_NONE) = 0
[pid 14119] mmap(0x2b76c2297000, 20480, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x2b76c2297000
[pid 14119] mmap(0x2b76c229c000, 17016, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b76c229c000
[pid 14119] close(3)                    = 0
[pid 14119] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b76c22a1000
[pid 14119] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b76c22a2000
[pid 14119] arch_prctl(ARCH_SET_FS, 0x2b76c22a1b10) = 0
[pid 14119] mprotect(0x2b76c2297000, 12288, PROT_READ) = 0
[pid 14119] mprotect(0xab0000, 8192, PROT_READ) = 0
[pid 14119] munmap(0x2b76c18c9000, 20573) = 0
[pid 14119] brk(0)                      = 0xa7bf000
[pid 14119] brk(0xa7e0000)              = 0xa7e0000
[pid 14119] rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_IGN}, 8) = 0
[pid 14119] brk(0xa801000)              = 0xa801000
[pid 14119] brk(0xa822000)              = 0xa822000
[pid 14119] brk(0xa843000)              = 0xa843000
[pid 14119] brk(0xa864000)              = 0xa864000
[pid 14119] stat("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
{st_mode=S_IFREG|0755, st_size=5371656, ...}) = 0
[pid 14119] lstat("/var", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 14119] lstat("/var/opt", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
[pid 14119] lstat("/var/opt/context", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
[pid 14119] lstat("/var/opt/context/tex", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
[pid 14119] lstat("/var/opt/context/tex/texmf-linux-64",  
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 14119] lstat("/var/opt/context/tex/texmf-linux-64/bin",  
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 14119] lstat("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
{st_mode=S_IFLNK|0777, st_size=6, ...}) = 0
[pid 14119] readlink("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
"luatex"..., 2048) = 6
[pid 14119] lstat("/var/opt/context/tex/texmf-linux-64/bin/luatex",  
{st_mode=S_IFREG|0755, st_size=5371656, ...}) = 0
[pid 14119] stat("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
{st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
[pid 14119] open("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
O_RDONLY) = 3
[pid 14119] close(3)                    = 0
[pid 14119] open("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
O_RDONLY) = 3
[pid 14119] fstat(3, {st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
[pid 14119] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b76c18c9000
[pid 14119] read(3, "#!/usr/bin/env texlua\n\nif not mod"..., 4096) =  
4096
[pid 14119] read(3, "tion nextchar(str, index)\n       "..., 4096) =  
4096
[pid 14119] read(3, "erns.hexadecimal   = P(\"0x\") * R("..., 4096) =  
4096
[pid 14119] brk(0xa885000)              = 0xa885000
[pid 14119] read(3, "        return s\n    else\n       "..., 4096) =  
4096
[pid 14119] read(3, "kind = (kind == 2 and 3) or 1\n   "..., 4096) =  
4096
[pid 14119] read(3, "t do -- no ipairs here\n        if"..., 4096) =  
4096
[pid 14119] read(3, "                      do_serializ"..., 4096) = 4096
[pid 14119] read(3, "at(st,\", \")))\n                   "..., 4096) =  
4096
[pid 14119] read(3, "otes,hexify)\n    serialize(root,n"..., 4096) =  
4096
[pid 14119] read(3, "at(tt,seperator or \" \")\nend\n\nfunc"..., 4096)  
= 4096
[pid 14119] read(3, "], f\n    else\n        return nil,"..., 4096) =  
4096
[pid 14119] brk(0xa8a6000)              = 0xa8a6000
[pid 14119] read(3, "ocal tabs   = { }\nlocal concat = "..., 4096) =  
4096
[pid 14119] read(3, "parator, io.pathseparator, os.typ"..., 4096) = 4096
[pid 14119] read(3, " clue what kind of OSX you're run"..., 4096) = 4096
[pid 14119] read(3, "^.+[/\\\\](.-)$\") or name\nend\n\nloca"...,  
4096) = 4096
[pid 14119] read(3, "nd\n            if n < 1 then\n    "..., 4096) =  
4096
[pid 14119] read(3, "    = \"Hans Hagen, PRAGMA-ADE, Ha"..., 4096) =  
4096
[pid 14119] brk(0xa8c7000)              = 0xa8c7000
[pid 14119] read(3, ")\",\"%1:\"))) or filename\nend\n\nfunc"...,  
4096) = 4096
[pid 14119] read(3, " = root .. path\n                l"..., 4096) =  
4096
[pid 14119] read(3, " function dir.expandname(str) -- "..., 4096) = 4096
[pid 14119] read(3, "lib.mkiv\",\n    author    = \"Hans "..., 4096) =  
4096
[pid 14119] read(3, "ult+1] = concat(tmp)\n            "..., 4096) =  
4096
[pid 14119] read(3, "ies.report(\"merge: inserting %s\","..., 4096) =  
4096
[pid 14119] brk(0xa8f0000)              = 0xa8f0000
[pid 14119] read(3, "AGMA ADE / ConTeXt Development Te"..., 4096) = 4096
[pid 14119] read(3, "               t[#t+1] = key .. '"..., 4096) = 4096
[pid 14119] read(3, "      = P(\".\")\nlocal zero        "..., 4096) =  
4096
[pid 14119] read(3, "nt in next, counters do\n        i"..., 4096) =  
4096
[pid 14119] read(3, "hen\n            local stoptime = "..., 4096) =  
4096
[pid 14119] read(3, "ompanion to luat-lib.mkiv\",\n    a"..., 4096) =  
4096
[pid 14119] read(3, "default -- can be set from cnf fi"..., 4096) = 4096
[pid 14119] read(3, "riments.enable(...)\n    report(\"e"..., 4096) =  
4096
[pid 14119] brk(0xa911000)              = 0xa911000
[pid 14119] read(3, "eded but saves checking when we g"..., 4096) = 4096
[pid 14119] read(3, "s.report(line)\n    end\nend\n\nfunct"..., 4096)  
= 4096
[pid 14119] read(3, " if not m then\n        m = { }\n  "..., 4096) =  
4096
[pid 14119] read(3, "g[ 0] = arg[2]\n    for k=3,#arg d"..., 4096) =  
4096
[pid 14119] read(3, "\nend\n\nif arg then\n\n    -- new, re"..., 4096)  
= 4096
[pid 14119] read(3, "name)\n            end\n        els"..., 4096) =  
4096
[pid 14119] brk(0xa932000)              = 0xa932000
[pid 14119] read(3, "ot that down to less 7.3 seconds."..., 4096) = 4096
[pid 14119] read(3, "file: \" .. gsub(txt,\"([ \\n\\r\\t]*)"..., 4096)  
= 4096
[pid 14119] read(3, "resolved entity &%s; -> %s (inter"..., 4096) = 4096
[pid 14119] read(3, "ttributevalue) / add_attribute\n--"..., 4096) =  
4096
[pid 14119] read(3, "tion)^0 * V(\"parent\") * trailer,\n"..., 4096) =  
4096
[pid 14119] read(3, "n='lpeg'/> from a filehandle so w"..., 4096) = 4096
[pid 14119] read(3, "i=1,#edt do\n                local"..., 4096) =  
4096
[pid 14119] read(3, " move to lxml-xml\n\nlocal result\n\n"..., 4096)  
= 4096
[pid 14119] read(3, "nd v.special and v.tg == \"@pi@\" t"..., 4096) =  
4096
[pid 14119] read(3, "elative to current\n-- a|b|c   : s"..., 4096) =  
4096
[pid 14119] brk(0xa953000)              = 0xa953000
[pid 14119] read(3, " p = ll.__p__\n        local d = p"..., 4096) =  
4096
[pid 14119] read(3, "                          collect"..., 4096) = 4096
[pid 14119] read(3, " Cc(\"')\")\nlocal lp_number  = S(\"+"..., 4096)  
= 4096
[pid 14119] read(3, "-child\"           } -- , apply = "..., 4096) =  
4096
[pid 14119] read(3, "= (P(\"***/\") + P(\"/\"))  * Cc(regi"..., 4096)  
= 4096
[pid 14119] read(3, "  if type(parsed) == \"string\" the"..., 4096) =  
4096
[pid 14119] read(3, "     collected = apply_axis[pi.ax"..., 4096) = 4096
[pid 14119] read(3, "== 0 then\n        return -- somet"..., 4096) =  
4096
[pid 14119] brk(0xa974000)              = 0xa974000
[pid 14119] read(3, " false\n        n = tonumber(n) or"..., 4096) =  
4096
[pid 14119] read(3, "      local s = match(dkm,\"\\n(%s+"..., 4096) =  
4096
[pid 14119] read(3, "   end\nend\n\nfunction xml.each(roo"..., 4096) =  
4096
[pid 14119] read(3, "cal d, k, rri = r.dt, e.ni, r.ri\n"..., 4096) =  
4096
[pid 14119] read(3, "]\n                if type(str) ~="..., 4096) =  
4096
[pid 14119] read(3, "= xml.insertafter\nxml.insert_elem"..., 4096) =  
4096
[pid 14119] read(3, "      local e = collection[c]\n   "..., 4096) =  
4096
[pid 14119] read(3, " return next(t) and t or nil\nend\n"..., 4096) =  
4096
[pid 14119] brk(0xa995000)              = 0xa995000
[pid 14119] brk(0xa9b6000)              = 0xa9b6000
[pid 14119] read(3, " currentdir function\n            "..., 4096) =  
4096
[pid 14119] read(3, "(\"resolvers.expansions\", function"..., 4096) =  
4096
[pid 14119] read(3, "turn newlist\nend\n\n-- We also put "..., 4096) =  
4096
[pid 14119] read(3, "                dirs[#dirs+1] = p"..., 4096) = 4096
[pid 14119] read(3, "ats['base']                      "..., 4096) = 4096
[pid 14119] read(3, " is somewhat dangerous, we want t"..., 4096) = 4096
[pid 14119] read(3, "ache(\"created: %s\",cachepath)\n   "..., 4096) =  
4096
[pid 14119] read(3, "itable,...)\n        else\n        "..., 4096) =  
4096
[pid 14119] read(3, "m-%d\"),\n        time    = os.date"..., 4096) =  
4096
[pid 14119] read(3, "ile.dirname, file.basename, file."..., 4096) = 4096
[pid 14119] read(3, "alue and value ~= \"\" then\n       "..., 4096) =  
4096
[pid 14119] read(3, "                end\n             "..., 4096) =  
4096
[pid 14119] read(3, "       instance.files[tag] = { }\n"..., 4096) =  
4096
[pid 14119] read(3, "        if vv ~= \"\" and not h[vv]"..., 4096) =  
4096
[pid 14119] brk(0xa9d7000)              = 0xa9d7000
[pid 14119] read(3, "e[ps] then\n                    ep"..., 4096) =  
4096
[pid 14119] read(3, " if not blobfile then\n           "..., 4096) =  
4096
[pid 14119] read(3, " local forcedname, ok, suffix = \""..., 4096) =  
4096
[pid 14119] read(3, "rt_resolvers(\"forcing filetype '%"..., 4096) =  
4096
[pid 14119] read(3, "esolvers(\"match to '%s' in hash f"..., 4096) =  
4096
[pid 14119] read(3, "        bname = files[rname]\n    "..., 4096) =  
4096
[pid 14119] read(3, "      local result = command(file"..., 4096) = 4096
[pid 14119] read(3, "bsolete.find_file  = resolvers.fi"..., 4096) = 4096
[pid 14119] read(3, "limit\n\nif not modules then module"..., 4096) =  
4096
[pid 14119] read(3, " shared = data.unique, data.share"..., 4096) = 4096
[pid 14119] brk(0xa9f8000)              = 0xa9f8000
[pid 14119] read(3, "            end\n            else\n"..., 4096) =  
4096
[pid 14119] read(3, "        report_resolvers(\"zip fin"..., 4096) =  
4096
[pid 14119] read(3, "\n        filter = format(\"^%s/(.+"..., 4096) =  
4096
[pid 14119] read(3, "solvers.finders, resolvers.opener"..., 4096) = 4096
[pid 14119] read(3, "olvers(\"! locating '%s'\",name)\n  "..., 4096) =  
4096
[pid 14119] read(3, "resolvers.cleanpath(oldname)\n    "..., 4096) =  
4096
[pid 14119] read(3, "olvers = resolvers\n\nlocal functio"..., 4096) =  
4096
[pid 14119] read(3, "          else\n                re"..., 4096) =  
4096
[pid 14119] read(3, "os.platform == \"unix\" and \"\\\\\\\\\" "...,  
4096) = 4096
[pid 14119] read(3, " .. \"/../../../texmf-dist/tex/con"..., 4096) =  
4096
[pid 14119] brk(0xaa19000)              = 0xaa19000
[pid 14119] read(3, "tions = {\n    [\"lua\"] = \"luatex -"..., 4096)  
= 4096
[pid 14119] read(3, "ormat\n            local path, nam"..., 4096) =  
4096
[pid 14119] read(3, "mpleline()\n            logs.simpl"..., 4096) =  
4096
[pid 14119] read(3, "\n        end\n    end\nend\n\nfunctio"..., 4096)  
= 4096
[pid 14119] read(3, "te but only if --autogenerate\n   "..., 4096) =  
4096
[pid 14119] read(3, "his script\n-- ... later we will u"..., 4096) =  
4096
[pid 14119] read(3, "xecute\") then\n\n    -- execute scr"..., 4096) =  
4096
[pid 14119] read(3, "guments_after)\n    resolvers.dowi"..., 4096) =  
2858
[pid 14119] read(3, ""..., 4096)        = 0
[pid 14119] close(3)                    = 0
[pid 14119] munmap(0x2b76c18c9000, 4096) = 0
[pid 14119] brk(0xaa3c000)              = 0xaa3c000
[pid 14119] brk(0xaa5f000)              = 0xaa5f000
[pid 14119] brk(0xaa82000)              = 0xaa82000
[pid 14119] brk(0xaaa3000)              = 0xaaa3000
[pid 14119] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 14119] --- SIGTERM (Terminated) @ 0 (0) ---
Process 14118 resumed
Process 14119 detached
<... wait4 resumed> [{WIFSIGNALED(s) && WTERMSIG(s) == SIGTERM}], 0,  
NULL) = 14119
write(2, "/var/opt/context/tex/texmf-linux-"..., 116/var/opt/context/ 
tex/texmf-linux-64/bin/context: line 2: 14119 Terminated               
mtxrun --script context "$@"
) = 116
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
wait4(-1, 0x7fffd5440bd4, WNOHANG, NULL) = -1 ECHILD (No child  
processes)
rt_sigreturn(0x8)                       = 0
rt_sigaction(SIGINT, {SIG_DFL}, {0x43a340, [], SA_RESTORER,  
0x2b0896021f60}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
read(255, ""..., 39)                    = 0
exit_group(143)                         = ?



Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Florian Wobbe]

> Am 2010-10-08 um 09:59 schrieb Florian Wobbe:
> 
>>> Thank you, but the problem is most probably something in my server setup that doesn't fit something in LuaTeX.
>>> As I mentioned: I got no problems calling TeX directly, just from the server process.
>> 
>> All right. I have one more suggestion. If you don't want to dive into debugging via gdb you should try another attempt at strace. Previously you posted a tracedump of context. But it only shows context (the shell script) waiting and nothing related to luatex. You may want to make strace follow forks (-f).
> 
> 
> Sorry, I've no experience using strace.

Some things are explained here: http://blog.ksplice.com/tag/unix/

> Here we are:
> 
> This is how my process tree looked:
> 14025 ?        Sl     0:01      |   \_ /var/www/xxx/bin/python /var/www/xxx/.../manage.py runfcgi  ...
> 14116 ?        S      0:00      |       \_ /bin/sh -c set >> _context.log && strace -f context --batchmode --once hello >> _context.log
> 14117 ?        S      0:00      |           \_ strace -f context --batchmode --once hello
> 14118 ?        T      0:00      |               \_ /bin/sh /var/opt/context/tex/texmf-linux-64/bin/context --batchmode --once hello
> 14119 ?        R      0:11      |                   \_ texlua /var/opt/context/tex/texmf-linux-64/bin/mtxrun --script context --batchmode --once hello
> 
> The logfile was empty, texlua seemed to hang. I killed 14119 and got:
> [...]
> [pid 14119] brk(0xaa3c000)              = 0xaa3c000
> [pid 14119] brk(0xaa5f000)              = 0xaa5f000
> [pid 14119] brk(0xaa82000)              = 0xaa82000
> [pid 14119] brk(0xaaa3000)              = 0xaaa3000
> [pid 14119] uname({sys="Linux", node="aine.fiee.net", ...}) = 0

This output looks quite messy because it is composed of the mixed output for five processes. I don't suspect the fault in luatex executable itself, however, mtxrun calls uname -m in a subshell and my guess is that it hangs there. Have you tried calling uname alone from your script? Next you could do

 strace -ff -o ctxtrace mtxrun --script context --batchmode --once hello

This gives you hopefully four ctxtrace.<pid> files. Then do (for each pid)

 strace -p <pid>

before killing luatex and see where it hangs. Interrupt and kill your luatex and have a look at the ctxtrace.* files.

Florian

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___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-08 um 11:25 schrieb Florian Wobbe:

> This output looks quite messy because it is composed of the mixed  
> output for five processes. I don't suspect the fault in luatex  
> executable itself, however, mtxrun calls uname -m in a subshell and  
> my guess is that it hangs there. Have you tried calling uname alone  
> from your script?

As I told Taco and Luigi off-list:
> Simply calling uname works
> as well as calling it in a shell script
> as well as calling another Python script that calls uname.



> Next you could do
> strace -ff -o ctxtrace mtxrun --script context --batchmode --once  
> hello

Ok, here we are:
14203 ?        Sl     0:01      |   \_ /var/www/xxx/bin/python /var/ 
www/.../manage.py runfcgi method=threaded ...
14255 ?        S      0:00      |       \_ strace -ff -o ctxtrace  
mtxrun --script context --batchmode --once hello
14256 ?        R      0:06      |           \_ texlua /var/opt/context/ 
tex/texmf-linux-64/bin/mtxrun --script context --batchmode --once hello

> This gives you hopefully four ctxtrace.<pid> files.

I got only one for 14256

> Then do (for each pid)
>  strace -p <pid>
> before killing luatex and see where it hangs. Interrupt and kill  
> your luatex and have a look at the ctxtrace.* files.

strace -p 14256
attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted

(as the same user as well as as root)

After killing my log file is empty. The ctxtrace file says:

execve("/var/opt/context/tex/texmf-linux-64/bin/mtxrun", ["mtxrun", "-- 
script", "context", "--batchmode", "--once", "hello"], [/* 10 vars  
*/]) = 0
brk(0)                                  = 0xe092000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b782d964000
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b782d965000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or  
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b782d967000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2b782db65000
mprotect(0x2b782dcaf000, 2093056, PROT_NONE) = 0
mmap(0x2b782deae000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x2b782deae000
mmap(0x2b782deb3000, 17016, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b782deb3000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b782deb8000
arch_prctl(ARCH_SET_FS, 0x2b782deb86e0) = 0
mprotect(0x2b782deae000, 12288, PROT_READ) = 0
munmap(0x2b782d967000, 20573)           = 0
brk(0)                                  = 0xe092000
brk(0xe0b3000)                          = 0xe0b3000
execve("/var/opt/context/tex/texmf-linux-64/bin/texlua", ["texlua", "/ 
var/opt/context/tex/texmf-linux"..., "--script", "context", "-- 
batchmode", "--once", "hello"], [/* 10 vars */]) = 0
brk(0)                                  = 0x1c0fd000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2acfe2773000
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2acfe2774000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or  
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2acfe2776000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libdl.so.2", O_RDONLY)       = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\20\16\0\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14616, ...}) = 0
mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2acfe2974000
mprotect(0x2acfe2976000, 2097152, PROT_NONE) = 0
mmap(0x2acfe2b76000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED| 
MAP_DENYWRITE, 3, 0x2000) = 0x2acfe2b76000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libm.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P> 
\0\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=534736, ...}) = 0
mmap(NULL, 2629848, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2acfe2b78000
mprotect(0x2acfe2bfa000, 2093056, PROT_NONE) = 0
mmap(0x2acfe2df9000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED| 
MAP_DENYWRITE, 3, 0x81000) = 0x2acfe2df9000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2acfe2dfb000
mprotect(0x2acfe2f45000, 2093056, PROT_NONE) = 0
mmap(0x2acfe3144000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x2acfe3144000
mmap(0x2acfe3149000, 17016, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2acfe3149000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2acfe314e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2acfe314f000
arch_prctl(ARCH_SET_FS, 0x2acfe314eb10) = 0
mprotect(0x2acfe3144000, 12288, PROT_READ) = 0
mprotect(0xab0000, 8192, PROT_READ)     = 0
munmap(0x2acfe2776000, 20573)           = 0
brk(0)                                  = 0x1c0fd000
brk(0x1c11e000)                         = 0x1c11e000
rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_IGN}, 8) = 0
brk(0x1c13f000)                         = 0x1c13f000
brk(0x1c160000)                         = 0x1c160000
brk(0x1c181000)                         = 0x1c181000
brk(0x1c1a2000)                         = 0x1c1a2000
stat("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
{st_mode=S_IFREG|0755, st_size=5371656, ...}) = 0
lstat("/var", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/var/opt", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/var/opt/context", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/var/opt/context/tex", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
lstat("/var/opt/context/tex/texmf-linux-64", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
lstat("/var/opt/context/tex/texmf-linux-64/bin", {st_mode=S_IFDIR| 
0755, st_size=4096, ...}) = 0
lstat("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
{st_mode=S_IFLNK|0777, st_size=6, ...}) = 0
readlink("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
"luatex"..., 2048) = 6
lstat("/var/opt/context/tex/texmf-linux-64/bin/luatex",  
{st_mode=S_IFREG|0755, st_size=5371656, ...}) = 0
stat("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
{st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
open("/var/opt/context/tex/texmf-linux-64/bin/mtxrun", O_RDONLY) = 3
close(3)                                = 0
open("/var/opt/context/tex/texmf-linux-64/bin/mtxrun", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2acfe2776000
read(3, "#!/usr/bin/env texlua\n\nif not mod"..., 4096) = 4096
read(3, "tion nextchar(str, index)\n       "..., 4096) = 4096
read(3, "erns.hexadecimal   = P(\"0x\") * R("..., 4096) = 4096
brk(0x1c1c3000)                         = 0x1c1c3000
read(3, "        return s\n    else\n       "..., 4096) = 4096
read(3, "kind = (kind == 2 and 3) or 1\n   "..., 4096) = 4096
read(3, "t do -- no ipairs here\n        if"..., 4096) = 4096
read(3, "                      do_serializ"..., 4096) = 4096
read(3, "at(st,\", \")))\n                   "..., 4096) = 4096
read(3, "otes,hexify)\n    serialize(root,n"..., 4096) = 4096
read(3, "at(tt,seperator or \" \")\nend\n\nfunc"..., 4096) = 4096
read(3, "], f\n    else\n        return nil,"..., 4096) = 4096
brk(0x1c1e4000)                         = 0x1c1e4000
read(3, "ocal tabs   = { }\nlocal concat = "..., 4096) = 4096
read(3, "parator, io.pathseparator, os.typ"..., 4096) = 4096
read(3, " clue what kind of OSX you're run"..., 4096) = 4096
read(3, "^.+[/\\\\](.-)$\") or name\nend\n\nloca"..., 4096) = 4096
read(3, "nd\n            if n < 1 then\n    "..., 4096) = 4096
read(3, "    = \"Hans Hagen, PRAGMA-ADE, Ha"..., 4096) = 4096
brk(0x1c205000)                         = 0x1c205000
read(3, ")\",\"%1:\"))) or filename\nend\n\nfunc"..., 4096) = 4096
read(3, " = root .. path\n                l"..., 4096) = 4096
read(3, " function dir.expandname(str) -- "..., 4096) = 4096
read(3, "lib.mkiv\",\n    author    = \"Hans "..., 4096) = 4096
read(3, "ult+1] = concat(tmp)\n            "..., 4096) = 4096
read(3, "ies.report(\"merge: inserting %s\","..., 4096) = 4096
brk(0x1c22e000)                         = 0x1c22e000
read(3, "AGMA ADE / ConTeXt Development Te"..., 4096) = 4096
read(3, "               t[#t+1] = key .. '"..., 4096) = 4096
read(3, "      = P(\".\")\nlocal zero        "..., 4096) = 4096
read(3, "nt in next, counters do\n        i"..., 4096) = 4096
read(3, "hen\n            local stoptime = "..., 4096) = 4096
read(3, "ompanion to luat-lib.mkiv\",\n    a"..., 4096) = 4096
read(3, "default -- can be set from cnf fi"..., 4096) = 4096
read(3, "riments.enable(...)\n    report(\"e"..., 4096) = 4096
brk(0x1c24f000)                         = 0x1c24f000
read(3, "eded but saves checking when we g"..., 4096) = 4096
read(3, "s.report(line)\n    end\nend\n\nfunct"..., 4096) = 4096
read(3, " if not m then\n        m = { }\n  "..., 4096) = 4096
read(3, "g[ 0] = arg[2]\n    for k=3,#arg d"..., 4096) = 4096
read(3, "\nend\n\nif arg then\n\n    -- new, re"..., 4096) = 4096
read(3, "name)\n            end\n        els"..., 4096) = 4096
brk(0x1c270000)                         = 0x1c270000
read(3, "ot that down to less 7.3 seconds."..., 4096) = 4096
read(3, "file: \" .. gsub(txt,\"([ \\n\\r\\t]*)"..., 4096) = 4096
read(3, "resolved entity &%s; -> %s (inter"..., 4096) = 4096
read(3, "ttributevalue) / add_attribute\n--"..., 4096) = 4096
read(3, "tion)^0 * V(\"parent\") * trailer,\n"..., 4096) = 4096
read(3, "n='lpeg'/> from a filehandle so w"..., 4096) = 4096
read(3, "i=1,#edt do\n                local"..., 4096) = 4096
read(3, " move to lxml-xml\n\nlocal result\n\n"..., 4096) = 4096
read(3, "nd v.special and v.tg == \"@pi@\" t"..., 4096) = 4096
read(3, "elative to current\n-- a|b|c   : s"..., 4096) = 4096
brk(0x1c291000)                         = 0x1c291000
read(3, " p = ll.__p__\n        local d = p"..., 4096) = 4096
read(3, "                          collect"..., 4096) = 4096
read(3, " Cc(\"')\")\nlocal lp_number  = S(\"+"..., 4096) = 4096
read(3, "-child\"           } -- , apply = "..., 4096) = 4096
read(3, "= (P(\"***/\") + P(\"/\"))  * Cc(regi"..., 4096) = 4096
read(3, "  if type(parsed) == \"string\" the"..., 4096) = 4096
read(3, "     collected = apply_axis[pi.ax"..., 4096) = 4096
read(3, "== 0 then\n        return -- somet"..., 4096) = 4096
brk(0x1c2b2000)                         = 0x1c2b2000
read(3, " false\n        n = tonumber(n) or"..., 4096) = 4096
read(3, "      local s = match(dkm,\"\\n(%s+"..., 4096) = 4096
read(3, "   end\nend\n\nfunction xml.each(roo"..., 4096) = 4096
read(3, "cal d, k, rri = r.dt, e.ni, r.ri\n"..., 4096) = 4096
read(3, "]\n                if type(str) ~="..., 4096) = 4096
read(3, "= xml.insertafter\nxml.insert_elem"..., 4096) = 4096
read(3, "      local e = collection[c]\n   "..., 4096) = 4096
read(3, " return next(t) and t or nil\nend\n"..., 4096) = 4096
brk(0x1c2d3000)                         = 0x1c2d3000
brk(0x1c2f4000)                         = 0x1c2f4000
read(3, " currentdir function\n            "..., 4096) = 4096
read(3, "(\"resolvers.expansions\", function"..., 4096) = 4096
read(3, "turn newlist\nend\n\n-- We also put "..., 4096) = 4096
read(3, "                dirs[#dirs+1] = p"..., 4096) = 4096
read(3, "ats['base']                      "..., 4096) = 4096
read(3, " is somewhat dangerous, we want t"..., 4096) = 4096
read(3, "ache(\"created: %s\",cachepath)\n   "..., 4096) = 4096
read(3, "itable,...)\n        else\n        "..., 4096) = 4096
read(3, "m-%d\"),\n        time    = os.date"..., 4096) = 4096
read(3, "ile.dirname, file.basename, file."..., 4096) = 4096
read(3, "alue and value ~= \"\" then\n       "..., 4096) = 4096
read(3, "                end\n             "..., 4096) = 4096
read(3, "       instance.files[tag] = { }\n"..., 4096) = 4096
read(3, "        if vv ~= \"\" and not h[vv]"..., 4096) = 4096
brk(0x1c315000)                         = 0x1c315000
read(3, "e[ps] then\n                    ep"..., 4096) = 4096
read(3, " if not blobfile then\n           "..., 4096) = 4096
read(3, " local forcedname, ok, suffix = \""..., 4096) = 4096
read(3, "rt_resolvers(\"forcing filetype '%"..., 4096) = 4096
read(3, "esolvers(\"match to '%s' in hash f"..., 4096) = 4096
read(3, "        bname = files[rname]\n    "..., 4096) = 4096
read(3, "      local result = command(file"..., 4096) = 4096
read(3, "bsolete.find_file  = resolvers.fi"..., 4096) = 4096
read(3, "limit\n\nif not modules then module"..., 4096) = 4096
read(3, " shared = data.unique, data.share"..., 4096) = 4096
brk(0x1c336000)                         = 0x1c336000
read(3, "            end\n            else\n"..., 4096) = 4096
read(3, "        report_resolvers(\"zip fin"..., 4096) = 4096
read(3, "\n        filter = format(\"^%s/(.+"..., 4096) = 4096
read(3, "solvers.finders, resolvers.opener"..., 4096) = 4096
read(3, "olvers(\"! locating '%s'\",name)\n  "..., 4096) = 4096
read(3, "resolvers.cleanpath(oldname)\n    "..., 4096) = 4096
read(3, "olvers = resolvers\n\nlocal functio"..., 4096) = 4096
read(3, "          else\n                re"..., 4096) = 4096
read(3, "os.platform == \"unix\" and \"\\\\\\\\\" "..., 4096) = 4096
read(3, " .. \"/../../../texmf-dist/tex/con"..., 4096) = 4096
brk(0x1c357000)                         = 0x1c357000
read(3, "tions = {\n    [\"lua\"] = \"luatex -"..., 4096) = 4096
read(3, "ormat\n            local path, nam"..., 4096) = 4096
read(3, "mpleline()\n            logs.simpl"..., 4096) = 4096
read(3, "\n        end\n    end\nend\n\nfunctio"..., 4096) = 4096
read(3, "te but only if --autogenerate\n   "..., 4096) = 4096
read(3, "his script\n-- ... later we will u"..., 4096) = 4096
read(3, "xecute\") then\n\n    -- execute scr"..., 4096) = 4096
read(3, "guments_after)\n    resolvers.dowi"..., 4096) = 2858
read(3, ""..., 4096)                    = 0
close(3)                                = 0
munmap(0x2acfe2776000, 4096)            = 0
brk(0x1c37a000)                         = 0x1c37a000
brk(0x1c39d000)                         = 0x1c39d000
brk(0x1c3c0000)                         = 0x1c3c0000
brk(0x1c3e1000)                         = 0x1c3e1000
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
--- SIGTERM (Terminated) @ 0 (0) ---
+++ killed by SIGTERM +++


(I guess I could have shortened some lines, but didn't want to delete  
something important...)


Greetlings, Hraban
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Re: calling ConTeXt as a background process

[Florian Wobbe]

On Oct 8, 2010, at 12:00 , Henning Hraban Ramm wrote:

> Am 2010-10-08 um 11:25 schrieb Florian Wobbe:
> 
>> This output looks quite messy because it is composed of the mixed output for five processes. I don't suspect the fault in luatex executable itself, however, mtxrun calls uname -m in a subshell and my guess is that it hangs there. Have you tried calling uname alone from your script?
> 
> As I told Taco and Luigi off-list:
>> Simply calling uname works
>> as well as calling it in a shell script
>> as well as calling another Python script that calls uname.
> 
> 
> 
>> Next you could do
>> strace -ff -o ctxtrace mtxrun --script context --batchmode --once hello
> 
> Ok, here we are:
> 14203 ?        Sl     0:01      |   \_ /var/www/xxx/bin/python /var/www/.../manage.py runfcgi method=threaded ...
> 14255 ?        S      0:00      |       \_ strace -ff -o ctxtrace mtxrun --script context --batchmode --once hello
> 14256 ?        R      0:06      |           \_ texlua /var/opt/context/tex/texmf-linux-64/bin/mtxrun --script context --batchmode --once hello
> 
>> This gives you hopefully four ctxtrace.<pid> files.
> 
> I got only one for 14256

Right, so you are not even getting to the point where luatex is called. This is still texlua executing instructions from mtxrun.

>> Then do (for each pid)
>> strace -p <pid>
>> before killing luatex and see where it hangs. Interrupt and kill your luatex and have a look at the ctxtrace.* files.
> 
> strace -p 14256
> attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted
> (as the same user as well as as root)

Something to do with SElinux?

> [...]
> read(3, "his script\n-- ... later we will u"..., 4096) = 4096
> read(3, "xecute\") then\n\n    -- execute scr"..., 4096) = 4096
> read(3, "guments_after)\n    resolvers.dowi"..., 4096) = 2858
> read(3, ""..., 4096)                    = 0
> close(3)                                = 0
> munmap(0x2acfe2776000, 4096)            = 0
> brk(0x1c37a000)                         = 0x1c37a000
> brk(0x1c39d000)                         = 0x1c39d000
> brk(0x1c3c0000)                         = 0x1c3c0000

Here, uname -m should be called. But I guess you still have all unames replaced by their return value I guess?

> brk(0x1c3e1000)                         = 0x1c3e1000
> uname({sys="Linux", node="aine.fiee.net", ...}) = 0
> --- SIGTERM (Terminated) @ 0 (0) ---
> +++ killed by SIGTERM +++

Here it should continue with reading texmfcnf.lua.

The last

  uname({sys="Linux", node="aine.fiee.net", ...

you get is from the os.uname call I would guess.

Try putting the lines

 for k, v in next, os.uname() do
   print(k, v)
 end

in a file and run it with texlua from the script to be sure.

Then you might also try to invoke luatex directly:

luatex --interaction=batchmode --fmt="<path to>/formats/cont-en" --lua="<path to>/formats/cont-en.lui" --backend=pdf hello

Florian

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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-08 um 13:46 schrieb Florian Wobbe:
> Right, so you are not even getting to the point where luatex is  
> called. This is still texlua executing instructions from mtxrun.

>> strace -p 14256
>> attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted
>> (as the same user as well as as root)
>
> Something to do with SElinux?

As far as I can tell, SElinux isn't active. (libselinux is installed,  
but no other selinux package)

> Here, uname -m should be called. But I guess you still have all  
> unames replaced by their return value I guess?

Yes, I didn't reinstate the original mtxrun script.

>> brk(0x1c3e1000)                         = 0x1c3e1000
>> uname({sys="Linux", node="aine.fiee.net", ...}) = 0
>> --- SIGTERM (Terminated) @ 0 (0) ---
>> +++ killed by SIGTERM +++
>
> Here it should continue with reading texmfcnf.lua.
>
> The last
>
>  uname({sys="Linux", node="aine.fiee.net", ...
>
> you get is from the os.uname call I would guess.

Probably.

> Try putting the lines
>
> for k, v in next, os.uname() do
>   print(k, v)
> end
>
> in a file and run it with texlua from the script to be sure.

That works:

texlua call_uname.lua

version #1 SMP Tue Jul 6 14:34:09 MSD 2010
release 2.6.18-028stab070.2
machine x86_64
nodename        aine.fiee.net
sysname Linux

> Then you might also try to invoke luatex directly:
>
> luatex --interaction=batchmode --fmt="<path to>/formats/cont-en" -- 
> lua="<path to>/formats/cont-en.lui" --backend=pdf hello

Now I get the defunct uname again:

16002 15978 TS   21 15:41 ?        00:00:01  \_ /var/www/xxx/bin/ 
python /var/www/.../manage.py run_gunicorn -c /var/www/.../gunicorn- 
settings.py
16210 16002 TS   14 15:42 ?        00:00:08      \_ luatex -- 
interaction=batchmode --fmt=/var/opt/context/tex/texmf-cache/.../ 
formats/cont-en --lua=/var/opt/context/tex/texmf-cache/...
16212 16210 TS   17 15:42 ?        00:00:00          \_ [uname]  
<defunct>

(Meanwhile I switched from fcgi to gunicorn app server, but that  
didn't change anything WRT ConTeXt.)

I get no log output.


BTW: Thank you very much for your patience! I owe you! (And you, Taco,  
of course, and the others!)

Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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Re: calling ConTeXt as a background process

[luigi scarso]

On Fri, Oct 8, 2010 at 3:47 PM, Henning Hraban Ramm <hraban@fiee.net> wrote:
> Am 2010-10-08 um 13:46 schrieb Florian Wobbe:
>>
>> Right, so you are not even getting to the point where luatex is called.
>> This is still texlua executing instructions from mtxrun.
>
>>> strace -p 14256
>>> attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted
>>> (as the same user as well as as root)
>>
>> Something to do with SElinux?
>
> As far as I can tell, SElinux isn't active. (libselinux is installed, but no
> other selinux package)
>
>> Here, uname -m should be called. But I guess you still have all unames
>> replaced by their return value I guess?
>
> Yes, I didn't reinstate the original mtxrun script.
>
>>> brk(0x1c3e1000)                         = 0x1c3e1000
>>> uname({sys="Linux", node="aine.fiee.net", ...}) = 0
>>> --- SIGTERM (Terminated) @ 0 (0) ---
>>> +++ killed by SIGTERM +++
>>
>> Here it should continue with reading texmfcnf.lua.
>>
>> The last
>>
>>  uname({sys="Linux", node="aine.fiee.net", ...
>>
>> you get is from the os.uname call I would guess.
>
> Probably.
>
>> Try putting the lines
>>
>> for k, v in next, os.uname() do
>>  print(k, v)
>> end
>>
>> in a file and run it with texlua from the script to be sure.
>
> That works:
>
> texlua call_uname.lua
>
> version #1 SMP Tue Jul 6 14:34:09 MSD 2010
> release 2.6.18-028stab070.2
> machine x86_64
> nodename        aine.fiee.net
> sysname Linux
>
>> Then you might also try to invoke luatex directly:
>>
>> luatex --interaction=batchmode --fmt="<path to>/formats/cont-en"
>> --lua="<path to>/formats/cont-en.lui" --backend=pdf hello
>
> Now I get the defunct uname again:
>
> 16002 15978 TS   21 15:41 ?        00:00:01  \_ /var/www/xxx/bin/python
> /var/www/.../manage.py run_gunicorn -c /var/www/.../gunicorn-settings.py
> 16210 16002 TS   14 15:42 ?        00:00:08      \_ luatex
> --interaction=batchmode
> --fmt=/var/opt/context/tex/texmf-cache/.../formats/cont-en
> --lua=/var/opt/context/tex/texmf-cache/...
> 16212 16210 TS   17 15:42 ?        00:00:00          \_ [uname] <defunct>
>
> (Meanwhile I switched from fcgi to gunicorn app server, but that didn't
> change anything WRT ConTeXt.)
>
> I get no log output.
valgrind ?

-- 
luigi
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Re: calling ConTeXt as a background process

[Taco Hoekwater]

On 10/08/2010 03:47 PM, Henning Hraban Ramm wrote:
>
> 16002 15978 TS 21 15:41 ? 00:00:01 \_ /var/www/xxx/bin/python
> /var/www/.../manage.py run_gunicorn -c /var/www/.../gunicorn-settings.py
> 16210 16002 TS 14 15:42 ? 00:00:08 \_ luatex --interaction=batchmode
> --fmt=/var/opt/context/tex/texmf-cache/.../formats/cont-en
> --lua=/var/opt/context/tex/texmf-cache/...
> 16212 16210 TS 17 15:42 ? 00:00:00 \_ [uname] <defunct>

Hm, defunct, eh?

The luatex binary itself definitely does not call uname as a
process, therefore this has to be the os.resultof() function
that Hans implements in l-os.lua. I am suspecting issues with
redirection now, as that function is defined as:

   function os.resultof(command)
     local handle = io.popen(command,"r")
     return handle and handle:read("*all") or ""
   end

and it is called like so:

   os.resultof('uname -m')

of course this will fail/block rather horribly if uname -m
does not write to STDOUT (and that is not just uname, thre
are a few more uses of os.resultof()).

Best wishes,
Taco
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Re: calling ConTeXt as a background process

[Patrick Gundlach]

> 
>  function os.resultof(command)
>    local handle = io.popen(command,"r")
>    return handle and handle:read("*all") or ""
>  end
> 

shouldn't the handle be close()d?

Patrick

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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-08 um 15:54 schrieb Taco Hoekwater:

> On 10/08/2010 03:47 PM, Henning Hraban Ramm wrote:
>>
>> 16002 15978 TS 21 15:41 ? 00:00:01 \_ /var/www/xxx/bin/python
>> /var/www/.../manage.py run_gunicorn -c /var/www/.../gunicorn- 
>> settings.py
>> 16210 16002 TS 14 15:42 ? 00:00:08 \_ luatex --interaction=batchmode
>> --fmt=/var/opt/context/tex/texmf-cache/.../formats/cont-en
>> --lua=/var/opt/context/tex/texmf-cache/...
>> 16212 16210 TS 17 15:42 ? 00:00:00 \_ [uname] <defunct>
>
> Hm, defunct, eh?
>
> The luatex binary itself definitely does not call uname as a
> process, therefore this has to be the os.resultof() function
> that Hans implements in l-os.lua. I am suspecting issues with
> redirection now, as that function is defined as:
>
>  function os.resultof(command)
>    local handle = io.popen(command,"r")
>    return handle and handle:read("*all") or ""
>  end

The version in the garden has:

function os.resultof(command)
     ioflush() -- else messed up logging
     local handle = io.popen(command,"r")
     if not handle then
     --  print("unknown command '".. command .. "' in os.resultof")
         return ""
     else
         return handle:read("*all") or ""
     end
end
> and it is called like so:
>
>  os.resultof('uname -m')
>
> of course this will fail/block rather horribly if uname -m
> does not write to STDOUT (and that is not just uname, thre
> are a few more uses of os.resultof()).

I tried to redirect stdout and stderr to my log file, maybe that's a  
problem then?

If I call using os.system, I can't redirect, but the result is the same.

I can redirect uname's output like so:
uname -m >> context.log
So I guess, it's using stdout at least normally - perhaps not via  
os.resultof, no clue.

I just don't understand why any lua script would call uname externally  
if it's available as os.uname?
Or does os.uname call os.resultof('uname')? (Probably not, otherwise  
Florian's suggestion wouldn't have worked.)

print(os.resultof('uname -m'))
gives
attempt to call field 'resultof' (a nil value)

Can I import that function anyhow? I just copied it to my script and  
replaced ioflush with io.flush.

My script now calls first os.uname and then the external one.
 From the shell it works like expected.
And even from the server process! That alone doesn't seem to be the  
problem.

Here's the trace:

strace -ff texlua call_uname.lua

execve("/var/opt/context/tex/texmf-linux-64/bin/texlua", ["texlua",  
"call_uname.lua"], [/* 10 vars */]) = 0
brk(0)                                  = 0x6a38000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b8eb789f000
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b8eb78a0000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or  
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 4, 0) = 0x2b8eb78a2000
close(4)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libdl.so.2", O_RDONLY)       = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\20\16\0\0\0\0\0\0@"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0644, st_size=14616, ...}) = 0
mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4,  
0) = 0x2b8eb7aa0000
mprotect(0x2b8eb7aa2000, 2097152, PROT_NONE) = 0
mmap(0x2b8eb7ca2000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED| 
MAP_DENYWRITE, 4, 0x2000) = 0x2b8eb7ca2000
close(4)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libm.so.6", O_RDONLY)        = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P> 
\0\0\0\0\0\0@"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0644, st_size=534736, ...}) = 0
mmap(NULL, 2629848, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4,  
0) = 0x2b8eb7ca4000
mprotect(0x2b8eb7d26000, 2093056, PROT_NONE) = 0
mmap(0x2b8eb7f25000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED| 
MAP_DENYWRITE, 4, 0x81000) = 0x2b8eb7f25000
close(4)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libc.so.6", O_RDONLY)        = 4
read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
fstat(4, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4,  
0) = 0x2b8eb7f27000
mprotect(0x2b8eb8071000, 2093056, PROT_NONE) = 0
mmap(0x2b8eb8270000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 4, 0x149000) = 0x2b8eb8270000
mmap(0x2b8eb8275000, 17016, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b8eb8275000
close(4)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b8eb827a000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b8eb827b000
arch_prctl(ARCH_SET_FS, 0x2b8eb827ab10) = 0
mprotect(0x2b8eb8270000, 12288, PROT_READ) = 0
mprotect(0xab0000, 8192, PROT_READ)     = 0
munmap(0x2b8eb78a2000, 20573)           = 0
brk(0)                                  = 0x6a38000
brk(0x6a59000)                          = 0x6a59000
rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_IGN}, 8) = 0
brk(0x6a7a000)                          = 0x6a7a000
brk(0x6a9b000)                          = 0x6a9b000
brk(0x6abc000)                          = 0x6abc000
brk(0x6add000)                          = 0x6add000
stat("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
{st_mode=S_IFREG|0755, st_size=5371656, ...}) = 0
lstat("/var", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/var/opt", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/var/opt/context", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/var/opt/context/tex", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
lstat("/var/opt/context/tex/texmf-linux-64", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
lstat("/var/opt/context/tex/texmf-linux-64/bin", {st_mode=S_IFDIR| 
0755, st_size=4096, ...}) = 0
lstat("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
{st_mode=S_IFLNK|0777, st_size=6, ...}) = 0
readlink("/var/opt/context/tex/texmf-linux-64/bin/texlua",  
"luatex"..., 2048) = 6
lstat("/var/opt/context/tex/texmf-linux-64/bin/luatex",  
{st_mode=S_IFREG|0755, st_size=5371656, ...}) = 0
stat("call_uname.lua", {st_mode=S_IFREG|0644, st_size=365, ...}) = 0
open("call_uname.lua", O_RDONLY)        = 4
close(4)                                = 0
open("call_uname.lua", O_RDONLY)        = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=365, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b8eb78a2000
read(4, "for k, v in next, os.uname() do\n "..., 4096) = 365
read(4, ""..., 4096)                    = 0
close(4)                                = 0
munmap(0x2b8eb78a2000, 4096)            = 0
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
fstat(1, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2b8eb78a2000
write(1, "version\t#1 SMP Tue Jul 6 14:34:09"..., 123version	#1 SMP  
Tue Jul 6 14:34:09 MSD 2010
release	2.6.18-028stab070.2
machine	x86_64
nodename	aine.fiee.net
sysname	Linux
) = 123
pipe([4, 9])                            = 0
clone(Process 30304 attached (waiting for parent)
Process 30304 resumed (parent 30303 ready)
child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,  
child_tidptr=0x2b8eb827aba0) = 30304
[pid 30304] close(4 <unfinished ...>
[pid 30303] close(9)                    = 0
[pid 30303] fstat(4, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
[pid 30303] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b8eb78a3000
[pid 30303] lseek(4, 0, SEEK_CUR)       = -1 ESPIPE (Illegal seek)
[pid 30303] read(4,  <unfinished ...>
[pid 30304] <... close resumed> )       = 0
[pid 30304] dup2(9, 1)                  = 1
[pid 30304] close(9)                    = 0
[pid 30304] execve("/bin/sh", ["sh", "-c", "uname -m"], [/* 14 vars  
*/]) = 0
[pid 30304] brk(0)                      = 0x15c3d000
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b0b55314000
[pid 30304] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 30304] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b0b55315000
[pid 30304] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] open("/etc/ld.so.cache", O_RDONLY) = 4
[pid 30304] fstat(4, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
[pid 30304] mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 4, 0) =  
0x2b0b55317000
[pid 30304] close(4)                    = 0
[pid 30304] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] open("/lib/libncurses.so.5", O_RDONLY) = 4
[pid 30304] read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\320%\1\0\0\0\0\0@"..., 832) = 832
[pid 30304] fstat(4, {st_mode=S_IFREG|0644, st_size=256288, ...}) = 0
[pid 30304] mmap(NULL, 2353152, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 4, 0) = 0x2b0b55515000
[pid 30304] mprotect(0x2b0b55550000, 2093056, PROT_NONE) = 0
[pid 30304] mmap(0x2b0b5574f000, 20480, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x3a000) = 0x2b0b5574f000
[pid 30304] close(4)                    = 0
[pid 30304] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] open("/lib/libdl.so.2", O_RDONLY) = 4
[pid 30304] read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\20\16\0\0\0\0\0\0@"..., 832) = 832
[pid 30304] fstat(4, {st_mode=S_IFREG|0644, st_size=14616, ...}) = 0
[pid 30304] mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 4, 0) = 0x2b0b55754000
[pid 30304] mprotect(0x2b0b55756000, 2097152, PROT_NONE) = 0
[pid 30304] mmap(0x2b0b55956000, 8192, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x2000) = 0x2b0b55956000
[pid 30304] close(4)                    = 0
[pid 30304] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] open("/lib/libc.so.6", O_RDONLY) = 4
[pid 30304] read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
[pid 30304] fstat(4, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
[pid 30304] mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 4, 0) = 0x2b0b55958000
[pid 30304] mprotect(0x2b0b55aa2000, 2093056, PROT_NONE) = 0
[pid 30304] mmap(0x2b0b55ca1000, 20480, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x149000) = 0x2b0b55ca1000
[pid 30304] mmap(0x2b0b55ca6000, 17016, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b0b55ca6000
[pid 30304] close(4)                    = 0
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b0b55cab000
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b0b55cac000
[pid 30304] arch_prctl(ARCH_SET_FS, 0x2b0b55cabaf0) = 0
[pid 30304] mprotect(0x2b0b55ca1000, 12288, PROT_READ) = 0
[pid 30304] munmap(0x2b0b55317000, 20573) = 0
[pid 30304] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 30304] open("/dev/tty", O_RDWR|O_NONBLOCK) = -1 ENXIO (No such  
device or address)
[pid 30304] ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fff4598a270) =  
-1 EINVAL (Invalid argument)
[pid 30304] brk(0)                      = 0x15c3d000
[pid 30304] brk(0x15c3e000)             = 0x15c3e000
[pid 30304] brk(0x15c3f000)             = 0x15c3f000
[pid 30304] getuid()                    = 1005
[pid 30304] getgid()                    = 1006
[pid 30304] geteuid()                   = 1005
[pid 30304] getegid()                   = 1006
[pid 30304] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 30304] brk(0x15c40000)             = 0x15c40000
[pid 30304] open("/proc/meminfo", O_RDONLY) = 4
[pid 30304] fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2b0b55317000
[pid 30304] read(4, "MemTotal:      2097152 kB\nMemFree"..., 4096) = 771
[pid 30304] close(4)                    = 0
[pid 30304] munmap(0x2b0b55317000, 4096) = 0
[pid 30304] brk(0x15c41000)             = 0x15c41000
[pid 30304] rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 30304] rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0
[pid 30304] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 30304] stat("/var/www/xxx/_textemp", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
[pid 30304] stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 30304] getpid()                    = 30304
[pid 30304] brk(0x15c42000)             = 0x15c42000
[pid 30304] getppid()                   = 30303
[pid 30304] stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 30304] stat("/var/opt/context/tex/texmf-linux-64/bin/sh",  
0x7fff4598a240) = -1 ENOENT (No such file or directory)
[pid 30304] stat("/var/www/xxx/bin/sh", 0x7fff4598a240) = -1 ENOENT  
(No such file or directory)
[pid 30304] stat("/command/sh", 0x7fff4598a240) = -1 ENOENT (No such  
file or directory)
[pid 30304] stat("/usr/local/bin/sh", 0x7fff4598a240) = -1 ENOENT (No  
such file or directory)
[pid 30304] stat("/usr/local/sbin/sh", 0x7fff4598a240) = -1 ENOENT (No  
such file or directory)
[pid 30304] stat("/bin/sh", {st_mode=S_IFREG|0755,  
st_size=797784, ...}) = 0
[pid 30304] open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 4
[pid 30304] read(4, "65536\n"..., 31)   = 6
[pid 30304] close(4)                    = 0
[pid 30304] brk(0x15cc2000)             = 0x15cc2000
[pid 30304] getgroups(65536, [1006])    = 1
[pid 30304] stat("/bin/sh", {st_mode=S_IFREG|0755,  
st_size=797784, ...}) = 0
[pid 30304] brk(0x15cc3000)             = 0x15cc3000
[pid 30304] socket(PF_FILE, SOCK_STREAM, 0) = 4
[pid 30304] fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
[pid 30304] connect(4, {sa_family=AF_FILE, path="/var/run/nscd/ 
socket"...}, 110) = 0
[pid 30304] sendto(4, "\2\0\0\0\v\0\0\0\7\0\0\0passwd\0"..., 19,  
MSG_NOSIGNAL, NULL, 0) = 19
[pid 30304] poll([{fd=4, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1  
([{fd=4, revents=POLLIN|POLLHUP}])
[pid 30304] recvmsg(4, {msg_name(0)=NULL, msg_iov(2)=[{"passwd\0"...,  
7}, {"\270O\3\0\0\0\0\0"..., 8}], msg_controllen=24, {cmsg_len=20,  
cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, {9}}, msg_flags=0},  
MSG_CMSG_CLOEXEC) = 15
[pid 30304] mmap(NULL, 217016, PROT_READ, MAP_SHARED, 9, 0) =  
0x2b0b55317000
[pid 30304] close(9)                    = 0
[pid 30304] close(4)                    = 0
[pid 30304] brk(0x15cc4000)             = 0x15cc4000
[pid 30304] getpgrp()                   = 30142
[pid 30304] rt_sigaction(SIGCHLD, {0x439730, [], SA_RESTORER,  
0x2b0b55989f60}, {SIG_DFL}, 8) = 0
[pid 30304] getrlimit(RLIMIT_NPROC, {rlim_cur=582*1024,  
rlim_max=582*1024}) = 0
[pid 30304] brk(0x15cc5000)             = 0x15cc5000
[pid 30304] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 30304] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 30304] rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 30304] stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
[pid 30304] stat("/var/opt/context/tex/texmf-linux-64/bin/uname",  
0x7fff4598a100) = -1 ENOENT (No such file or directory)
[pid 30304] stat("/var/www/xxx/bin/uname", 0x7fff4598a100) = -1 ENOENT  
(No such file or directory)
[pid 30304] stat("/command/uname", 0x7fff4598a100) = -1 ENOENT (No  
such file or directory)
[pid 30304] stat("/usr/local/bin/uname", 0x7fff4598a100) = -1 ENOENT  
(No such file or directory)
[pid 30304] stat("/usr/local/sbin/uname", 0x7fff4598a100) = -1 ENOENT  
(No such file or directory)
[pid 30304] stat("/bin/uname", {st_mode=S_IFREG|0755,  
st_size=29304, ...}) = 0
[pid 30304] stat("/bin/uname", {st_mode=S_IFREG|0755,  
st_size=29304, ...}) = 0
[pid 30304] rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
[pid 30304] rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_IGN}, 8) = 0
[pid 30304] rt_sigaction(SIGCHLD, {SIG_DFL}, {0x439730, [],  
SA_RESTORER, 0x2b0b55989f60}, 8) = 0
[pid 30304] execve("/bin/uname", ["uname", "-m"], [/* 14 vars */]) = 0
[pid 30304] brk(0)                      = 0x144a4000
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2aee46ccf000
[pid 30304] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 30304] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2aee46cd0000
[pid 30304] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] open("/etc/ld.so.cache", O_RDONLY) = 4
[pid 30304] fstat(4, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
[pid 30304] mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 4, 0) =  
0x2aee46cd2000
[pid 30304] close(4)                    = 0
[pid 30304] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such  
file or directory)
[pid 30304] open("/lib/libc.so.6", O_RDONLY) = 4
[pid 30304] read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
[pid 30304] fstat(4, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
[pid 30304] mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE| 
MAP_DENYWRITE, 4, 0) = 0x2aee46ed0000
[pid 30304] mprotect(0x2aee4701a000, 2093056, PROT_NONE) = 0
[pid 30304] mmap(0x2aee47219000, 20480, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x149000) = 0x2aee47219000
[pid 30304] mmap(0x2aee4721e000, 17016, PROT_READ|PROT_WRITE,  
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aee4721e000
[pid 30304] close(4)                    = 0
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2aee47223000
[pid 30304] arch_prctl(ARCH_SET_FS, 0x2aee472236e0) = 0
[pid 30304] mprotect(0x2aee47219000, 12288, PROT_READ) = 0
[pid 30304] munmap(0x2aee46cd2000, 20573) = 0
[pid 30304] brk(0)                      = 0x144a4000
[pid 30304] brk(0x144c5000)             = 0x144c5000
[pid 30304] uname({sys="Linux", node="aine.fiee.net", ...}) = 0
[pid 30304] fstat(1, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
[pid 30304] mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_ANONYMOUS, -1, 0) = 0x2aee46cd2000
[pid 30304] write(1, "x86_64\n"..., 7 <unfinished ...>
[pid 30303] <... read resumed> "x86_64\n"..., 4096) = 7
[pid 30303] read(4,  <unfinished ...>
[pid 30304] <... write resumed> )       = 7
[pid 30304] close(1 <unfinished ...>
[pid 30303] <... read resumed> ""..., 4096) = 0
[pid 30303] close(4)                    = 0
[pid 30303] wait4(30304, Process 30303 suspended
  <unfinished ...>
[pid 30304] <... close resumed> )       = 0
[pid 30304] munmap(0x2aee46cd2000, 4096) = 0
[pid 30304] close(2)                    = 0
[pid 30304] exit_group(0)               = ?
Process 30303 resumed
Process 30304 detached
<... wait4 resumed> [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL)  
= 30304
--- SIGCHLD (Child exited) @ 0 (0) ---
munmap(0x2b8eb78a3000, 4096)            = 0
write(1, "x86_64\n\n"..., 8x86_64

)            = 8
exit_group(0)                           = ?





Greetlings, Hraban
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Taco Hoekwater]

Hi,

On 10/08/2010 04:30 PM, Henning Hraban Ramm wrote:
>
> I just don't understand why any lua script would call uname externally
> if it's available as os.uname?

My guess is that this is historical. Hans?

Best wishes,
Taco
Sorry, no smart ideas about the rest of the problems any more

___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: calling ConTeXt as a background process

[Hans Hagen]

On 8-10-2010 4:57, Taco Hoekwater wrote:
>
> Hi,
>
> On 10/08/2010 04:30 PM, Henning Hraban Ramm wrote:
>>
>> I just don't understand why any lua script would call uname externally
>> if it's available as os.uname?
>
> My guess is that this is historical. Hans?

yes, and also related to some issues on osx where the built in uname was 
not yet ok (needs checking, but not today by me)


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Re: calling ConTeXt as a background process

[Florian Wobbe]

On Oct 8, 2010, at 16:30 , Henning Hraban Ramm wrote:

> Am 2010-10-08 um 15:54 schrieb Taco Hoekwater:
> 
>> On 10/08/2010 03:47 PM, Henning Hraban Ramm wrote:
>>> 
>>> 16002 15978 TS 21 15:41 ? 00:00:01 \_ /var/www/xxx/bin/python
>>> /var/www/.../manage.py run_gunicorn -c /var/www/.../gunicorn-settings.py
>>> 16210 16002 TS 14 15:42 ? 00:00:08 \_ luatex --interaction=batchmode
>>> --fmt=/var/opt/context/tex/texmf-cache/.../formats/cont-en
>>> --lua=/var/opt/context/tex/texmf-cache/...
>>> 16212 16210 TS 17 15:42 ? 00:00:00 \_ [uname] <defunct>
>> 
>> Hm, defunct, eh?
>> 
>> The luatex binary itself definitely does not call uname as a
>> process, therefore this has to be the os.resultof() function
>> that Hans implements in l-os.lua. I am suspecting issues with
>> redirection now, as that function is defined as:
>> 
>> function os.resultof(command)
>>   local handle = io.popen(command,"r")
>>   return handle and handle:read("*all") or ""
>> end

The strange thing is that running

 luatex --interaction=batchmode --fmt=".../formats/cont-en" --lua=".../formats/cont-en.lui" --backend=pdf hello

causes luatex (or say l-os.lua) to call 'uname -m' via os.resultof

However, when doing

 mtxrun --script context --batchmode --once hello

*only* texlua calls 'uname -m' and the following luatex child does *not* anymore. Why?

>> of course this will fail/block rather horribly if uname -m
>> does not write to STDOUT (and that is not just uname, thre
>> are a few more uses of os.resultof()).

if that is the case you should not see any reads after the child forks:

clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7feb7a0369d0) = 14998
[...]
read(3, "x86_64\n", 4096) = 7
read(3, "", 4096) = 0
--- SIGCHLD (Child exited) @ 0 (0) ---

> My script now calls first os.uname and then the external one.
> From the shell it works like expected.
> And even from the server process! That alone doesn't seem to be the problem.
> 
> Here's the trace:
> 
> strace -ff texlua call_uname.lua
> 
> [...]

I'm running out of ideas. From your script os.resultof("uname -m") works and from luatex it doesn't. What does this trace distinguish from the one of luatex?

Florian

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Re: calling ConTeXt as a background process (SOLVED)

[Henning Hraban Ramm]

Ok, the failures were the same with fcgi and gunicorn app servers.

But it _works_ with django's dev server (which you must not use in  
production due to memory/security holes etc.).

While ConTeXt runs it looks like:

5852 25767 TS   21 18:04 pts/0    00:00:00      \_ python manage.py  
runserver 8000
1477  5852 TS   23 18:07 pts/0    00:00:03          \_ /var/www/ 
cerebrale/bin/python manage.py runserver 8000
3395  1477 TS   22 18:08 pts/0    00:00:00              \_ /bin/sh -c  
date "+%Y-%m-%d %H:%M:%S" && cd /var/www/.../_textemp && /var/opt/ 
context/tex/texmf-linux-64/bin/context --purgeall --batchmode -- 
result="/var/www/...
3397  3395 TS   22 18:08 pts/0    00:00:00                  \_ /bin/ 
sh /var/opt/context/tex/texmf-linux-64/bin/context --purgeall -- 
batchmode --result=/var/www/...
3398  3397 TS   15 18:08 pts/0    00:00:00                      \_  
texlua /var/opt/context/tex/texmf-linux-64/bin/mtxrun --script context  
--purgeall --batchmode --result=/var/www/...
3400  3398 TS   21 18:08 pts/0    00:00:00                          \_  
luatex --interaction=batchmode --fmt=/var/opt/context/tex/texmf- 
cache/.../cont-en --lua=/var/opt/context/tex...

TeX completes fast, and everything seems well afterwards.

But I started that app server from an active shell. Maybe that's the  
difference?
Right, if I start gunicorn manually, it also works.
So, the culprit seems to be the automatic background start of the app  
server via daemontools.

I'll have to test other means of starting and supervising the  
processes - e.g. runit or supervisor.
Since I like Python and don't want to replace "init" yet, I try the  
latter first.

Some hours later:
YES IT WORKS with supervisor so far!


Thank you all for your patience, ideas and help!


Greetlings from Lake Constance!
Hraban
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Re: calling ConTeXt as a background process (SOLVED)

[Patrick Gundlach]

> 
> Thank you all for your patience, ideas and help!

Sorry, that I didn't quite understand the problem/solution, could you describe in a few sentences what problem was and how you solved it?

Thanks

Patrick

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Re: calling ConTeXt as a background process (SOLVED)

[Henning Hraban Ramm]

Am 2010-10-10 um 10:47 schrieb Patrick Gundlach:

>> Thank you all for your patience, ideas and help!
>
> Sorry, that I didn't quite understand the problem/solution, could  
> you describe in a few sentences what problem was and how you solved  
> it?


I actually couldn't find out what the real problem was. ;-)

I tried to start ConTeXt from a Django web application server.  
(Running ConTeXt from an active shell was no problem.)

My Django FCGI processes were running under daemontools (http://cr.yp.to/daemontools.html 
) supervision, i.e. started by its supervise daemon.

In this setup, texlua hung at least at uname (and maybe other) calls.  
I found no error messages on that, I guess the environment was  
restricted in some way.

Since I thought it might have to do with the FCGI server, I replaced  
that by Green Unicorn (http://gunicorn.org/), but that made no  
difference WRT ConTeXt.

When I changed process supervision from daemontools to supervisor (http://supervisord.org/ 
), I got no further problems.


Greetlings from Lake Constance!
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Re: calling ConTeXt as a background process (SOLVED)

[Taco Hoekwater]

Hi Henning,

On 10/08/10 21:44, Henning Hraban Ramm wrote:
> Ok, the failures were the same with fcgi and gunicorn app servers.
> 
> But it _works_ with django's dev server (which you must not use in
> production due to memory/security holes etc.).

We just had a somewhat similar problem (texlua hung at 100% cpu
when run via apache) and it turns out, after lots of debugging,
that mtxrun cannot do anything without $HOME. Perhaps yours was
a different symptom of the same problem ?

try this if you want to test CPU heat generation:

  $ env HOME= context knuth

(use one process for each available cpu thread, of course)

Best wishes,
Taco
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Re: calling ConTeXt as a background process (SOLVED)

[Hans Hagen]

On 26-10-2010 9:28, Taco Hoekwater wrote:
>
> Hi Henning,
>
> On 10/08/10 21:44, Henning Hraban Ramm wrote:
>> Ok, the failures were the same with fcgi and gunicorn app servers.
>>
>> But it _works_ with django's dev server (which you must not use in
>> production due to memory/security holes etc.).
>
> We just had a somewhat similar problem (texlua hung at 100% cpu
> when run via apache) and it turns out, after lots of debugging,
> that mtxrun cannot do anything without $HOME. Perhaps yours was
> a different symptom of the same problem ?
>
> try this if you want to test CPU heat generation:
>
>    $ env HOME= context knuth

so what should HOME default to then? "."?



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Re: calling ConTeXt as a background process (SOLVED)

[Taco Hoekwater]

On 10/26/10 22:09, Hans Hagen wrote:
> On 26-10-2010 9:28, Taco Hoekwater wrote:
>>
>> Hi Henning,
>>
>> On 10/08/10 21:44, Henning Hraban Ramm wrote:
>>> Ok, the failures were the same with fcgi and gunicorn app servers.
>>>
>>> But it _works_ with django's dev server (which you must not use in
>>> production due to memory/security holes etc.).
>>
>> We just had a somewhat similar problem (texlua hung at 100% cpu
>> when run via apache) and it turns out, after lots of debugging,
>> that mtxrun cannot do anything without $HOME. Perhaps yours was
>> a different symptom of the same problem ?
>>
>> try this if you want to test CPU heat generation:
>>
>>    $ env HOME= context knuth
> 
> so what should HOME default to then? "."?

Not a default is what is needed, what is needed is that it should work
without a HOME at all (server processes typically dont have one).
Let's sort this out offlist.

Best wishes,
Taco
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Re: calling ConTeXt as a background process (SOLVED)

[Hans Hagen]

On 26-10-2010 10:56, Taco Hoekwater wrote:
>
>
> On 10/26/10 22:09, Hans Hagen wrote:
>> On 26-10-2010 9:28, Taco Hoekwater wrote:
>>>
>>> Hi Henning,
>>>
>>> On 10/08/10 21:44, Henning Hraban Ramm wrote:
>>>> Ok, the failures were the same with fcgi and gunicorn app servers.
>>>>
>>>> But it _works_ with django's dev server (which you must not use in
>>>> production due to memory/security holes etc.).
>>>
>>> We just had a somewhat similar problem (texlua hung at 100% cpu
>>> when run via apache) and it turns out, after lots of debugging,
>>> that mtxrun cannot do anything without $HOME. Perhaps yours was
>>> a different symptom of the same problem ?
>>>
>>> try this if you want to test CPU heat generation:
>>>
>>>     $ env HOME= context knuth
>>
>> so what should HOME default to then? "."?
>
> Not a default is what is needed, what is needed is that it should work
> without a HOME at all (server processes typically dont have one).

sure, but I guess that some path specs have ~ and that we get a loop in 
the resolver due to this and for these patsh with ~ we need a proper 
default then

> Let's sort this out offlist.

okay

Hans

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Re: calling ConTeXt as a background process (SOLVED)

[Henning Hraban Ramm]

Am 2010-10-26 um 21:28 schrieb Taco Hoekwater:

> We just had a somewhat similar problem (texlua hung at 100% cpu
> when run via apache) and it turns out, after lots of debugging,
> that mtxrun cannot do anything without $HOME. Perhaps yours was
> a different symptom of the same problem ?

Ah, I didn't check HOME; I'll add that to my environment, just in case.
(But ATM it runs well.)

> try this if you want to test CPU heat generation:
>  $ env HOME= context knuth
> (use one process for each available cpu thread, of course)

;-)
I'm using a rented virtual server and won't feel the heat. (And I  
guess the hoster will just throttle or disable it if I try to melt it.)

Thank you!


Greetlings from Lake Constance!
Hraban
---
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https://www.cacert.org (I'm an assurer)

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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Just installed Ruby, fetched the latest beta and tried texexec:

26382 26367 TS   20 16:38 ?        00:00:01  \_ /var/www/xxx/bin/ 
python /var/www/xxx/manage.py run_gunicorn -c /var/www/.../gunicorn- 
settings.py
26509 26382 TS   20 16:38 ?        00:00:00      \_ /bin/sh -c texexec  
--batchmode --once hello >> _context.log
26510 26509 TS   20 16:38 ?        00:00:00          \_ /bin/sh /var/ 
opt/context/tex/texmf-linux-64/bin/texexec --batchmode --once hello
26511 26510 TS   14 16:38 ?        00:00:21              \_ texlua / 
var/opt/context/tex/texmf-linux-64/bin/mtxrun --usekpse --execute  
texexec --batchmode --once hello
26512 26511 TS   14 16:38 ?        00:00:00                  \_  
[uname] <defunct>

Argl, I didn't knew texexec also depends on mtxrun/lua...

Ok, patching mtxrun again, now I even replace os.uname, but I get the  
same as above.



Hraban

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Re: calling ConTeXt as a background process

[taco]

Henning Hraban Ramm wrote:
> 
> I can imagine that it has something to do with SElinux settings, didn't 
> dive in that yet.

That does sound familiar, in fact. I had a hanging database server
a while back because I moved it to a different location. apparmor
was the culprit in that case, so perhaps it is here as well ?

(Basically an application will get a 'resource unavailable' when
it tries to access anything outside of the apparmor allowed
directories for that service/binary).

In any case, check /etc/apparmor and /etc/apparmor.d

Best wishes,
Taco



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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Summary so far:

* Machine: virtual server on Debian 5.0 (x86_64) (I thought it was  
Ubuntu, because I run that on my other Linux machines, sorry).
* Webserver: Django 1.2/fcgi (Python 2.5) behind Nginx

I can run ConTeXt without any problems from the shell, also as the  
same user that runs the server process.
 From the shell it doesn't matter if I call it as "context" (that's a  
shell script calling mtxrun), "mtxrun", other shell script or simple  
Python script.

I want to run ConTeXt from the server process (at the end I want it to  
run via Celery/RabbitMQ, but that doesn't matter at the moment), but  
it hangs at the texlua process and doesn't do anything.
- With an unmodified mtxrun that hangs at its external "uname" call  
(gets "defunct"); I patched it to just take "x86_64" instead of  
calling uname.
- After that it doesn't matter how I call ConTeXt, it always hangs at  
texlua.
- I tried os.system (that directly uses C's system call) and several  
variants of subprocess.Popen
- I tried calling setuptex as well as setting PATH, TEXROOT and  
TEXMFOS for the environment of the process and checked that they exist  
in the call.
- Calls of several linux tools via os.system or subprocess.Popen worked.

I suspected SElinux settings, Taco hinted at AppArmor, but both aren't  
active, as far as I can tell.

So, the problem is with the web server and texlua. Django/fcgi  
unfortunately swallows error messages (known problem of the fcgi mode).

Next I'll try a different server setup. Unfortunately Apache with  
mod_wsgi or mod_python is too heavy for my virtual server (with Nginx  
I can run more that 5 Django sites, with Apache I had massive  
ressource problems with 3-4).
Green Unicorn (http://gunicorn.org/) looks good for my purpose.

Sorry for the OT thread, I suspected the problem being more in the  
LuaTeX area.


Greetlings from Lake Constance!
Hraban
---
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https://www.cacert.org (I'm an assurer)

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Re: calling ConTeXt as a background process

[Patrick Gundlach]

> Sorry for the OT thread, I suspected the problem being more in the LuaTeX area.

I don't think it's in the LuaTeX area, for LuaTeX is just a regular process.

I have to admit that I have run into similar problems with different software I tried to run from a "server process" (whatever this means) and it always took me some time to get it right. At the end it was aways clear to me why it wouldn't run (but I can't remember anymore, since it is many years ago). So I suggest to replace the LuaTeX call with different other software and see where it breaks. Use software that reads STDIN, that writes to STDOUT/STDERR and alike and see if they are ok.

Patrick

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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-08 um 10:12 schrieb Patrick Gundlach:

> I don't think it's in the LuaTeX area, for LuaTeX is just a regular  
> process.

Hm, I suspect it might be some system call inside LuaTeX that is  
blocked or the like.

> I have to admit that I have run into similar problems with different  
> software I tried to run from a "server process" (whatever this  
> means) and it always took me some time to get it right. At the end  
> it was aways clear to me why it wouldn't run (but I can't remember  
> anymore, since it is many years ago). So I suggest to replace the  
> LuaTeX call with different other software and see where it breaks.  
> Use software that reads STDIN, that writes to STDOUT/STDERR and  
> alike and see if they are ok.

A simple case like
python -c "print 'Hello'"
works ok.
I tried shell commands and simple tools (echo, set, date, touch)  
before, and strace works, too.

Even "texlua --help" works, so it's not texlua generally.

texlua --script context --batchmode --once hello
gives: "Script file context not found"
(at least a usable error message, nothing hangs)
The same with
/var/opt/context/tex/setuptex && texlua --script context --batchmode -- 
once hello




Greetlings from Lake Constance!
Hraban
---
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Re: calling ConTeXt as a background process

[luigi scarso]

On Fri, Oct 8, 2010 at 11:21 AM, Henning Hraban Ramm <hraban@fiee.net> wrote:
> Am 2010-10-08 um 10:12 schrieb Patrick Gundlach:
>
>> I don't think it's in the LuaTeX area, for LuaTeX is just a regular
>> process.
>
> Hm, I suspect it might be some system call inside LuaTeX that is blocked or
> the like.
>
>> I have to admit that I have run into similar problems with different
>> software I tried to run from a "server process" (whatever this means) and it
>> always took me some time to get it right. At the end it was aways clear to
>> me why it wouldn't run (but I can't remember anymore, since it is many years
>> ago). So I suggest to replace the LuaTeX call with different other software
>> and see where it breaks. Use software that reads STDIN, that writes to
>> STDOUT/STDERR and alike and see if they are ok.
>
> A simple case like
> python -c "print 'Hello'"
> works ok.
> I tried shell commands and simple tools (echo, set, date, touch) before, and
> strace works, too.
>
> Even "texlua --help" works, so it's not texlua generally.
>
> texlua --script context --batchmode --once hello
> gives: "Script file context not found"
> (at least a usable error message, nothing hangs)
> The same with
> /var/opt/context/tex/setuptex && texlua --script context --batchmode --once
> hello
I use something like this
os.system("""bash -c 'cd /opt/luatex/minimals-new/tex ; source
setuptex ; echo $PATH;cd "%(jobpath)s" && context --batch
"%(filetex)s" 2>/dev/null 1>/dev/null'""" %kv)


-- 
luigi
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Re: calling ConTeXt as a background process

[luigi scarso]

On Fri, Oct 8, 2010 at 10:00 AM, Henning Hraban Ramm <hraban@fiee.net> wrote:
> Summary so far:
>
> * Machine: virtual server on Debian 5.0 (x86_64) (I thought it was Ubuntu,
> because I run that on my other Linux machines, sorry).
> * Webserver: Django 1.2/fcgi (Python 2.5) behind Nginx
>
> I can run ConTeXt without any problems from the shell, also as the same user
> that runs the server process.
> From the shell it doesn't matter if I call it as "context" (that's a shell
> script calling mtxrun), "mtxrun", other shell script or simple Python
> script.
>
> I want to run ConTeXt from the server process (at the end I want it to run
> via Celery/RabbitMQ, but that doesn't matter at the moment), but it hangs at
> the texlua process and doesn't do anything.
An user permissions/environment issue ?
After this I have no other suggestions.
-- 
luigi
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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-08 um 10:37 schrieb luigi scarso:
> An user permissions/environment issue ?


I can't exclude that, but since the web server and its subprocesses  
run as the same user that I (can) use for login and got no problems  
running TeX as that user, I wouldn't know where to look for the wrong  
permissions.

Greetlings from Lake Constance!
Hraban
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Re: calling ConTeXt as a background process

[luigi scarso]

On Fri, Oct 8, 2010 at 10:47 AM, Henning Hraban Ramm <hraban@fiee.net> wrote:
> Am 2010-10-08 um 10:37 schrieb luigi scarso:
>>
>> An user permissions/environment issue ?
>
>
> I can't exclude that, but since the web server and its subprocesses run as
> the same user that I (can) use for login and got no problems running TeX as
> that user, I wouldn't know where to look for the wrong permissions.
try to cd to a 777 dir

-- 
luigi
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Re: calling ConTeXt as a background process

[Hans Hagen]

On 8-10-2010 10:00, Henning Hraban Ramm wrote:

> Sorry for the OT thread, I suspected the problem being more in the
> LuaTeX area.

I never had problems running luatex (texlua) on linux boxes as part of a 
web service so I cannot image luatex being the problem. Can you see what 
pdftex does?

Hans


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Re: calling ConTeXt as a background process

[Robin.Kirkham]

Posted by Henning Hraban Ramm [hraban@fiee.net]

> Am 2010-10-07 um 10:42 schrieb Taco Hoekwater:
> 
> > On 10/07/10 09:34, Henning Hraban Ramm wrote:
> >> mtxrun --script context "prd_paket --batchmode --once"
> >
> > When I run that last thing on the command line, I get:
> >
> >  ! I can't find file `./prd_paket --batchmode --once'.
> >  <*> "./prd_paket --batchmode --once"
> >
> >  Please type another input file name:
> 
> Of course, prd_paket.tex is my input file. But that's there.
> 
> > But it is hard to say whether that is the problem. If it was
> > me, I would attach a gdb to the process to see where it is at
> > from the backtrace (but you need a non-stripped build of
> > the binary for that).
> 
> I'd like to avoid compiling a debugging version of luatex...

Hraban,

Have you tried attaching to the stalled processes using strace (Linux)
or dtruss (Mac)?  This will tell you what system call is blocking, might
give a clue. The defunct uname process in your original post suggests
to me the parent did not calling wait() on the child (uname) and it exited.

Best,

Robin
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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 12:16 schrieb <Robin.Kirkham@csiro.au>:
> Have you tried attaching to the stalled processes using strace (Linux)
> or dtruss (Mac)?  This will tell you what system call is blocking,  
> might
> give a clue. The defunct uname process in your original post suggests
> to me the parent did not calling wait() on the child (uname) and it  
> exited.

Here's the output of strace after I killed the stalled process:

execve("/var/opt/context/tex/texmf-linux-64/bin/context", ["/var/opt/ 
context/tex/texmf-linux"..., "--batchmode", "--once", "prd_streifband- 
d"], [/* 10 vars */]) = 0
brk(0)                                  = 0x1e4bd000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2ababa192000
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2ababa193000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or  
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=20573, ...}) = 0
mmap(NULL, 20573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2ababa195000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libncurses.so.5", O_RDONLY)  = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320% 
\1\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=256288, ...}) = 0
mmap(NULL, 2353152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2ababa393000
mprotect(0x2ababa3ce000, 2093056, PROT_NONE) = 0
mmap(0x2ababa5cd000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 3, 0x3a000) = 0x2ababa5cd000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libdl.so.2", O_RDONLY)       = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\20\16\0\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14616, ...}) = 0
mmap(NULL, 2109728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2ababa5d2000
mprotect(0x2ababa5d4000, 2097152, PROT_NONE) = 0
mmap(0x2ababa7d4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED| 
MAP_DENYWRITE, 3, 0x2000) = 0x2ababa7d4000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or  
directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0> 
\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,  
0) = 0x2ababa7d6000
mprotect(0x2ababa920000, 2093056, PROT_NONE) = 0
mmap(0x2ababab1f000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x2ababab1f000
mmap(0x2ababab24000, 17016, PROT_READ|PROT_WRITE, MAP_PRIVATE| 
MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2ababab24000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2ababab29000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2ababab2a000
arch_prctl(ARCH_SET_FS, 0x2ababab29af0) = 0
mprotect(0x2ababab1f000, 12288, PROT_READ) = 0
munmap(0x2ababa195000, 20573)           = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
open("/dev/tty", O_RDWR|O_NONBLOCK)     = -1 ENXIO (No such device or  
address)
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fff561b3e10) = -1 EINVAL  
(Invalid argument)
brk(0)                                  = 0x1e4bd000
brk(0x1e4be000)                         = 0x1e4be000
brk(0x1e4bf000)                         = 0x1e4bf000
getuid()                                = 1005
getgid()                                = 1006
geteuid()                               = 1005
getegid()                               = 1006
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
brk(0x1e4c0000)                         = 0x1e4c0000
open("/proc/meminfo", O_RDONLY)         = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,  
0) = 0x2ababa195000
read(3, "MemTotal:      2097152 kB\nMemFree"..., 4096) = 771
close(3)                                = 0
munmap(0x2ababa195000, 4096)            = 0
brk(0x1e4c1000)                         = 0x1e4c1000
rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0
uname({sys="Linux", node="aine.fiee.net", ...}) = 0
stat("/var/www/xxx/_textemp", {st_mode=S_IFDIR|0755,  
st_size=4096, ...}) = 0
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getpid()                                = 26040
getppid()                               = 26038
brk(0x1e4c2000)                         = 0x1e4c2000
socket(PF_FILE, SOCK_STREAM, 0)         = 3
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
connect(3, {sa_family=AF_FILE, path="/var/run/nscd/socket"...}, 110) = 0
sendto(3, "\2\0\0\0\v\0\0\0\7\0\0\0passwd\0"..., 19, MSG_NOSIGNAL,  
NULL, 0) = 19
poll([{fd=3, events=POLLIN|POLLERR|POLLHUP}], 1, 5000) = 1 ([{fd=3,  
revents=POLLIN|POLLHUP}])
recvmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"passwd\0"..., 7}, {"\270O 
\3\0\0\0\0\0"..., 8}], msg_controllen=24, {cmsg_len=20,  
cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, {4}}, msg_flags=0},  
MSG_CMSG_CLOEXEC) = 15
mmap(NULL, 217016, PROT_READ, MAP_SHARED, 4, 0) = 0x2ababa195000
close(4)                                = 0
close(3)                                = 0
brk(0x1e4c3000)                         = 0x1e4c3000
getpgrp()                               = 29995
rt_sigaction(SIGCHLD, {0x439730, [], SA_RESTORER, 0x2ababa807f60},  
{SIG_DFL}, 8) = 0
getrlimit(RLIMIT_NPROC, {rlim_cur=582*1024, rlim_max=582*1024}) = 0
brk(0x1e4c4000)                         = 0x1e4c4000
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
open("/var/opt/context/tex/texmf-linux-64/bin/context", O_RDONLY) = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7fff561b3e80) = -1 ENOTTY  
(Inappropriate ioctl for device)
lseek(3, 0, SEEK_CUR)                   = 0
read(3, "#!/bin/sh\nmtxrun --script context"..., 80) = 39
lseek(3, 0, SEEK_SET)                   = 0
getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
dup2(3, 255)                            = 255
close(3)                                = 0
fcntl(255, F_SETFD, FD_CLOEXEC)         = 0
fcntl(255, F_GETFL)                     = 0x8000 (flags O_RDONLY| 
O_LARGEFILE)
fstat(255, {st_mode=S_IFREG|0755, st_size=39, ...}) = 0
lseek(255, 0, SEEK_CUR)                 = 0
brk(0x1e4c5000)                         = 0x1e4c5000
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
read(255, "#!/bin/sh\nmtxrun --script context"..., 39) = 39
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
brk(0x1e4c6000)                         = 0x1e4c6000
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
{st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 3
read(3, "65536\n"..., 31)               = 6
close(3)                                = 0
brk(0x1e546000)                         = 0x1e546000
getgroups(65536, [1006])                = 1
stat("/var/opt/context/tex/texmf-linux-64/bin/mtxrun",  
{st_mode=S_IFREG|0755, st_size=428842, ...}) = 0
brk(0x1e547000)                         = 0x1e547000
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID| 
SIGCHLD, child_tidptr=0x2ababab29b80) = 26041
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {0x43a340, [], SA_RESTORER, 0x2ababa807f60},  
{SIG_DFL}, 8) = 0
wait4(-1, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGTERM}], 0, NULL) = 26041
write(2, "/var/opt/context/tex/texmf-linux-"..., 116/var/opt/context/ 
tex/texmf-linux-64/bin/context: line 2: 26041 Terminated               
mtxrun --script context "$@"
) = 116
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
wait4(-1, 0x7fff561b3b74, WNOHANG, NULL) = -1 ECHILD (No child  
processes)
rt_sigreturn(0x8)                       = 0
rt_sigaction(SIGINT, {SIG_DFL}, {0x43a340, [], SA_RESTORER,  
0x2ababa807f60}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
read(255, ""..., 39)                    = 0
exit_group(143)                         = ?


Can you tell what's going on?



Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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Re: calling ConTeXt as a background process

[Patrick Gundlach]

Hi Hraban,

> 
> How's ConTeXt called in ConTeXtgarden Live? Any special means?

Please CC me for these kind of questions, for I don't follow the list every day.


I've put context live into a repo at github:

http://github.com/pgundlach/contextlive

and take a look at

http://github.com/pgundlach/contextlive/blob/master/runtexexec.c


I use fork()/exec() combination in C.


Patrick

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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 12:27 schrieb Patrick Gundlach:

>> How's ConTeXt called in ConTeXtgarden Live? Any special means?
>
> http://github.com/pgundlach/contextlive/blob/master/runtexexec.c
>
> I use fork()/exec() combination in C.

Ok, I won't use C...

I guess it's a problem of my specific combination of Ubuntu/SElinux,  
Django/fcgi and LuaTeX... :-(
I found others running latex from Django in exactly the same matter as  
ConTeXt fails for me.
But I can call other programs that way, so part of the problem is in  
LuaTeX.

Greetlings, Hraban
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Re: calling ConTeXt as a background process

[luigi scarso]

On Thu, Oct 7, 2010 at 5:44 PM, Henning Hraban Ramm <hraban@fiee.net> wrote:
> Am 2010-10-07 um 12:27 schrieb Patrick Gundlach:
>
>>> How's ConTeXt called in ConTeXtgarden Live? Any special means?
>>
>> http://github.com/pgundlach/contextlive/blob/master/runtexexec.c
>>
>> I use fork()/exec() combination in C.
>
> Ok, I won't use C...
>
> I guess it's a problem of my specific combination of Ubuntu/SElinux,
> Django/fcgi and LuaTeX... :-(
> I found others running latex from Django in exactly the same matter as
> ConTeXt fails for me.
> But I can call other programs that way, so part of the problem is in LuaTeX.
1) Are you sure to have done source setuptex before run luatex
2) does os.system(...) in python only work ?


-- 
luigi
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Re: calling ConTeXt as a background process

[Henning Hraban Ramm]

Am 2010-10-07 um 17:48 schrieb luigi scarso:
>>>> How's ConTeXt called in ConTeXtgarden Live? Any special means?
>>> http://github.com/pgundlach/contextlive/blob/master/runtexexec.c
>>> I use fork()/exec() combination in C.
>> Ok, I won't use C...

I saw you set TEXMFHOME - I don't need that for MkIV, do I?

> 1) Are you sure to have done source setuptex before run luatex

tried that and tried to set TEXROOT and TEXMFOS "manually" (and the  
output of "set" looks right).

> 2) does os.system(...) in python only work ?


Thank you, I didn't think of the easiest option!

With strace I get a return code of 0, so the command seems to run  
through, nothing hangs, but also nothing happens.

Without strace texlua hangs, and after killing it I get a 36608 (don't  
know what that is, it's not the PID).


Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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