oota@mail.linux.bs1.fc.nec.co.jp
2008-Mar-18 03:00 UTC
[Samba] logfile reopen error happen (may be samba bug?)
Dear Samba Team
When I used Samba , I found some error messages in syslog.
The error messages were printed immediately when I executed smbcontrol command
with "reload-config" option (as follows).
# smbcontrol smbd reload-config
The error messages are as follows.
Mar 11 13:58:27 ML4SP2 smb: nmbd startup succeeded
Mar 11 13:58:47 ML4SP2 smbd[20860]: [2008/03/11 13:58:47, 0, pid=20860,
effective(99, 99), real(99, 0)] lib/debug.c:reopen_logs(625)
Mar 11 13:58:47 ML4SP2 smbd[20860]: Unable to open new log file
/var/log/samba/10.19.71.31.log: Permission denied
Mar 11 13:58:47 ML4SP2 smbd[20860]: [2008/03/11 13:58:47, 0, pid=20860,
effective(99, 99), real(99, 0)] lib/debug.c:reopen_logs(625)
Mar 11 13:58:47 ML4SP2 smbd[20860]: Unable to open new log file
/var/log/samba/10.19.71.31.log: Permission denied
Mar 11 13:58:47 ML4SP2 smbd[20860]: [2008/03/11 13:58:47, 0, pid=20860,
effective(99, 99), real(99, 0)] lib/debug.c:reopen_logs(625)
Mar 11 13:58:47 ML4SP2 smbd[20860]: Unable to open new log file
/var/log/samba/10.19.71.31.log: Permission denied
I checked the source code, and I found the error in "reopen_logs"
function in "lib/debuc.c".
A part concerned is as follows.
621 new_dbf = x_fopen( debugf, O_WRONLY|O_APPEND|O_CREAT, 0644);
622
623 if (!new_dbf) {
624 log_overflow = True;
625 DEBUG(0, ("Unable to open new log file %s: %s\n",
debugf, strerror(errno)));
626 log_overflow = False;
627 if (dbf)
628 x_fflush(dbf);
629 ret = False;
630 } else {
631 x_setbuf(new_dbf, NULL);
632 old_dbf = dbf;
633 dbf = new_dbf;
634 if (old_dbf)
635 (void) x_fclose(old_dbf);
636 }
The cause is the execution of the smbcontrol command when smbd runs as user uid
(not root uid).
When smbd runs as user uid, the log file cannot be opened again because there
are no right to
write to the directory.
I think the reason of the error is that there is no right to access in the
directory.
Is it possible to deal with this problem?
--
--- Oota Toshiya --- oota at mail.linux.bs1.fc.nec.co.jp
NEC Computers Software Operations Unit Shiba,Minato,Tokyo
Open Source Software Platform Development Division Japan,Earth,Solar system
(samba-jp/ldap-jp Staff,mutt-j admin,analog-jp/samba-jp postmaster)