Re: calling ConTeXt as a background process

[Henning Hraban Ramm <hraban@fiee.net>]

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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