dovecot - Jul 2010 - Dsync error when working dir o-rwx

Hi,

I dont know why dsync requires o+rx in working dir, at least it could give 
better error message when working dir has o-rwx.

# cd
# mkdir test
# cd test
# dsync -D -v -u 'info at example.org' -o
'mail_privileged_group=mail' -o
'mail_location=mbox:/email/info at example.org/mail:INBOX=/var/mail/info at
example.org'
mirror 'maildir:~/Maildir'
dsync(info at example.org): Info: Sport: only in source
dsync(info at example.org): Info: INBOX: only in source

# cd
# mkdir test
# chmod o-rwx test
# cd test
# dsync -D -v -u 'info at example.org' -o
'mail_privileged_group=mail' -o
'mail_location=mbox:/email/info at example.org/mail:INBOX=/var/mail/info at
example.org'
mirror 'maildir:~/Maildir'
dsync(info at example.org): Info: Sport: only in source
dsync(info at example.org): Info: INBOX: only in source
dsync(info at example.org): Error: open(.) failed: Permission denied
dsync(info at example.org): Error: open(.) failed: Permission denied
dsync(info at example.org): Panic: file mbox-sync-rewrite.c: line 247 
(mbox_sync_try_rewrite): assertion failed: (sync_ctx->mbox->mbox_lock_type
== F_WRLCK)
dsync(info at example.org): Error: Raw backtrace: 
/usr/lib/dovecot/libdovecot.so.0 [0x7f9fbc8489f2] -> 
/usr/lib/dovecot/libdovecot.so.0(default_fatal_handler+0x37) 
[0x7f9fbc848ae7] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) 
[0x7f9fbc848e03] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(mbox_sync_try_rewrite+0x255) 
[0x7f9fbcb0c7b5] -> /usr/lib/dovecot/libdovecot-storage.so.0 
[0x7f9fbcb1506a] -> /usr/lib/dovecot/libdovecot-storage.so.0 
[0x7f9fbcb15a30] -> /usr/lib/dovecot/libdovecot-storage.so.0(mbox_sync+0x46) 
[0x7f9fbcb16846] -> /usr/lib/dovecot/libdovecot-storage.so.0 
[0x7f9fbcb10701] -> dsync [0x410729] -> 
dsync(dsync_worker_update_mailbox+0x32) [0x40ee32] -> 
dsync(dsync_brain_sync+0xc6b) [0x40892b] -> dsync(dsync_brain_sync_all+0x18) 
[0x408d48] -> dsync(main+0x536) [0x4070a6] -> 
/lib/libc.so.6(__libc_start_main+0xe6) [0x7f9fbc0cd1a6] -> dsync [0x406989]
Aborted


Kind Regards
Jan V?tek

?ESK? WEBHOSTING s.r.o.
Tel: +420 605 25 25 25
http://www.cweb.cz

On Sat, 2010-07-24 at 11:15 +0200, Jan V?tek wrote:
> # dsync -D -v -u 'info at example.org' -o
'mail_privileged_group=mail' -o
> 'mail_location=mbox:/email/info at
example.org/mail:INBOX=/var/mail/info at example.org'
> mirror 'maildir:~/Maildir'
> dsync(info at example.org): Info: Sport: only in source
> dsync(info at example.org): Info: INBOX: only in source
> dsync(info at example.org): Error: open(.) failed: Permission denied
The problem was mail_privileged_group. It wanted to chdir() and then
fchdir() back to original directory. I fixed this by making dsync -u
always chdir() to user's home directory first (it should have been doing
that anyway).
> dsync(info at example.org): Panic: file mbox-sync-rewrite.c: line 247 
> (mbox_sync_try_rewrite): assertion failed:
(sync_ctx->mbox->mbox_lock_type
> == F_WRLCK)
Fixed also this crash.