* Re: [9fans] replica under 9vx
[not found] <<13426df10910032308j1c9aac90k51dd2400db23f79f@mail.gmail.com>
@ 2009-10-04 15:22 ` erik quanstrom
2009-10-04 16:30 ` ron minnich
0 siblings, 1 reply; 11+ messages in thread
From: erik quanstrom @ 2009-10-04 15:22 UTC (permalink / raw)
To: 9fans
> 13293 mkdir("/mnt/sdb1/tc/plan9/9vx-0.12/sys/lib/texmf/bibtex/bst", 0)
> = -1 EACCES (Permission denied)
>
perhaps replica is expecting specific error messages
and they're not getting translated
; cd /n/sources/plan9/`{pwd}
; g strstr
applylog.c:161: if(strstr(buf, "entry not found") || strstr(buf, "not exist"))
applylog.c:1036: if(strstr(err, "permission") == nil)
updatedb.c:107: p = strstr(msg, ": ");
updatedb.c:123: if(cistrstr(p, "hungup") || cistrstr(p, "Hangup")
updatedb.c:124: || cistrstr(p, "rpc error")
updatedb.c:125: || cistrstr(p, "shut down")
updatedb.c:126: || cistrstr(p, "i/o")
updatedb.c:127: || cistrstr(p, "connection"))
- erik
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-04 15:22 ` [9fans] replica under 9vx erik quanstrom
@ 2009-10-04 16:30 ` ron minnich
2009-10-04 17:20 ` Steve Simon
0 siblings, 1 reply; 11+ messages in thread
From: ron minnich @ 2009-10-04 16:30 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
On Sun, Oct 4, 2009 at 8:22 AM, erik quanstrom <quanstro@quanstro.net> wrote:
>> 13293 mkdir("/mnt/sdb1/tc/plan9/9vx-0.12/sys/lib/texmf/bibtex/bst", 0)
>> = -1 EACCES (Permission denied)
>>
>
> perhaps replica is expecting specific error messages
> and they're not getting translated
>
> ; cd /n/sources/plan9/`{pwd}
> ; g strstr
> applylog.c:161: if(strstr(buf, "entry not found") || strstr(buf, "not exist"))
> applylog.c:1036: if(strstr(err, "permission") == nil)
> updatedb.c:107: p = strstr(msg, ": ");
> updatedb.c:123: if(cistrstr(p, "hungup") || cistrstr(p, "Hangup")
> updatedb.c:124: || cistrstr(p, "rpc error")
> updatedb.c:125: || cistrstr(p, "shut down")
> updatedb.c:126: || cistrstr(p, "i/o")
> updatedb.c:127: || cistrstr(p, "connection"))
Even if this is not it, you raise a possible issue: for things like
devfs-posix.c we may need to map error strings as in the previous
patch for oserror(). I just looked for strcmp in the kernel ... OK,
good point, I'll look at this later. I don't see this explaining a
mkdir with mode of 0 however.
ron
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-04 16:30 ` ron minnich
@ 2009-10-04 17:20 ` Steve Simon
2009-10-04 21:15 ` ron minnich
0 siblings, 1 reply; 11+ messages in thread
From: Steve Simon @ 2009-10-04 17:20 UTC (permalink / raw)
To: 9fans
> I don't see this explaining a
> mkdir with mode of 0 however.
Does the file/dir actually have a mode of zero on the source machine?
Plan9 can happily create an object with mode zero but a posix
emulation of wstat() must do the rename()/chmod()/chown()/chgrp()
etc in a fixed order which is bound to make some combinations
mutually exclusive.
-Steve
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-04 17:20 ` Steve Simon
@ 2009-10-04 21:15 ` ron minnich
2009-10-05 0:55 ` Fernan Bolando
0 siblings, 1 reply; 11+ messages in thread
From: ron minnich @ 2009-10-04 21:15 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
On Sun, Oct 4, 2009 at 10:20 AM, Steve Simon <steve@quintile.net> wrote:
>> I don't see this explaining a
>> mkdir with mode of 0 however.
>
> Does the file/dir actually have a mode of zero on the source machine?
no, it has mode 755
This is for the tex install but the problem exists in general when
using applylog on 9vx. I just don't see why yet.
Gonna rebuild 9vx with some debug prints ...
ron
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-04 21:15 ` ron minnich
@ 2009-10-05 0:55 ` Fernan Bolando
2009-10-05 4:42 ` ron minnich
0 siblings, 1 reply; 11+ messages in thread
From: Fernan Bolando @ 2009-10-05 0:55 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
On Mon, Oct 5, 2009 at 5:15 AM, ron minnich <rminnich@gmail.com> wrote:
> On Sun, Oct 4, 2009 at 10:20 AM, Steve Simon <steve@quintile.net> wrote:
>>> I don't see this explaining a
>>> mkdir with mode of 0 however.
>>
>> Does the file/dir actually have a mode of zero on the source machine?
>
> no, it has mode 755
>
> This is for the tex install but the problem exists in general when
> using applylog on 9vx. I just don't see why yet.
>
> Gonna rebuild 9vx with some debug prints ...
>
I remember getting the same problem, when I installed tex on 9vx. I
thought my installation was bad, so I manually changed permission
which got tex installed.
just incase it is related I also had problems running ape/psh which is
due to permission failure.
rebuilding ape fixed that problem as indicated in the thread
http://9fans.net/narchive/2008/09/206
fernan
--
http://www.fernski.com
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-05 0:55 ` Fernan Bolando
@ 2009-10-05 4:42 ` ron minnich
2009-10-05 6:39 ` ron minnich
0 siblings, 1 reply; 11+ messages in thread
From: ron minnich @ 2009-10-05 4:42 UTC (permalink / raw)
To: fernanbolando, Fans of the OS Plan 9 from Bell Labs
seems to be a bug in replica on 9vx? I'll look more tomorrow.
mkdir /sys/lib/texmf perm -20000000000
mkdir /sys/lib/texmf/bibtex perm -20000000000
mkdir /sys/lib/texmf/bibtex/bst perm -20000000000
mkdir /sys/lib/texmf/bibtex/bst/base perm -20000000000
mkdir /sys/lib/texmf/bibtex/bst/base/abbrv.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/acm.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/alpha.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/apalike.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/ieeetr.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/plain.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/siam.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/base/unsrt.bst perm 0
mkdir /sys/lib/texmf/bibtex/bst/ams perm -20000000000
directories are created with permissions of 0. Then a mkdir follows
and it's a bad day. The proto has more reasonable values :-)
ron
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-05 4:42 ` ron minnich
@ 2009-10-05 6:39 ` ron minnich
2009-10-05 6:41 ` ron minnich
0 siblings, 1 reply; 11+ messages in thread
From: ron minnich @ 2009-10-05 6:39 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
OK, it's an incompatibility between Posix world and Plan 9 world. It's
because mkdir doesn't open the directory, and
create on Plan 9 does.
Here is what I think is the relevant code from applylog.
if(rd.mode&DMDIR){
fd = create(local, OREAD, DMDIR); <========= creates d--------- --
but it's open.
if(fd < 0 && isdir(local))
fd = open(local, OREAD);
if(fd < 0){
error("mkdir %q: %r", name);
skip = 1;
continue;
}
This sequence works fine on Plan 9.
In devfs-posix.c we have this:
if(mkdir(path, perm & 0777) < 0)
oserror();
if((fd = open(path, 0)) < 0)
oserror();
Which fails very badly on linux if perm is 0, as it is from replica.
This works on Plan 9 because create is one operation, even for
directories. Chalk it up to another Posix botch. I can't recall how
many times this one has bitten me.
I can special-case the code in devfs-posix.c:
if (perm&0400 == 0) then do a mkdir, an open, and an fchmod. Tomorrow,
that is. I think the work-around is pretty easy.
I figure the 0400 might work because mode has to be OREAD at this point anyway.
or, simpler: take this code:
// Be like Plan 9 file servers: inherit mode bits
// and group from parent.
fchmod(fd, perm & st.st_mode & 0777);
which happens AFTER the mkdir, and instead compute the perms first and
do the mkdir with those perms.
Russ, any reason to make the d--------- perm directory and then change
it with the fchmod later? Can we just do the mkdir with the final
permissions? Or is this d--------- guarding against some race
condition in the linux vfs?
ron
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [9fans] replica under 9vx
2009-10-05 6:39 ` ron minnich
@ 2009-10-05 6:41 ` ron minnich
0 siblings, 0 replies; 11+ messages in thread
From: ron minnich @ 2009-10-05 6:41 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
Should have gone to bed before writing the last note.
On Sun, Oct 4, 2009 at 11:39 PM, ron minnich <rminnich@gmail.com> wrote:
> if (perm&0400 == 0) then do a mkdir with 0400, an open, and an fchmod. Tomorrow,
> that is. I think the work-around is pretty easy.
> I figure the 0400 might work because mode has to be OREAD at this point anyway.
This is the only way to do it, since as I earlier pointed out, perm is
0 ... sheesh!
Good night all :-)
ron
^ permalink raw reply [flat|nested] 11+ messages in thread
[parent not found: <<13426df10910042341k73b0de26u6c7f3f1992549c9c@mail.gmail.com>]
[parent not found: <<f7c633ef2aae073a6ed65cf21142b5b2@quintile.net>]
* [9fans] replica under 9vx
@ 2009-10-04 6:08 ron minnich
0 siblings, 0 replies; 11+ messages in thread
From: ron minnich @ 2009-10-04 6:08 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
I'm having an issue with replica on 9vx. I keep getting files like this:
d--------- 2 tc staff 4096 Oct 4 05:38 bibtex/
d--------- 2 tc staff 4096 Oct 4 05:38 bin/
strace shows this:
13293 mkdir("/mnt/sdb1/tc/plan9/9vx-0.12/sys/lib/texmf/bibtex/bst", 0)
= -1 EACCES (Permission denied)
Which looks like a bad idea.
I'm going to look into devfs-posix but wanted to mention this in case
anyone has seen it too.
thanks
ron
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2009-10-05 13:56 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <<13426df10910032308j1c9aac90k51dd2400db23f79f@mail.gmail.com>
2009-10-04 15:22 ` [9fans] replica under 9vx erik quanstrom
2009-10-04 16:30 ` ron minnich
2009-10-04 17:20 ` Steve Simon
2009-10-04 21:15 ` ron minnich
2009-10-05 0:55 ` Fernan Bolando
2009-10-05 4:42 ` ron minnich
2009-10-05 6:39 ` ron minnich
2009-10-05 6:41 ` ron minnich
[not found] <<13426df10910042341k73b0de26u6c7f3f1992549c9c@mail.gmail.com>
2009-10-05 13:56 ` erik quanstrom
[not found] <<f7c633ef2aae073a6ed65cf21142b5b2@quintile.net>
2009-10-04 17:25 ` erik quanstrom
2009-10-04 6:08 ron minnich
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).