Le 28 juin 09 à 03:54, Timo Sirainen a écrit :
On Fri, 2009-06-26 at 10:33 +0200, Axel Luttgens wrote:
Wouldn't it be possible, for example, to consider using a system user
such as "nobody" (unless I'm wrong, it should be defined on any unix
flavor)?
I guess. Done: http://hg.dovecot.org/dovecot-1.2/rev/2db158dd88be
Wow! Thank you, Timo.
So, I tried the patch but unfortunately got this in system.log:
org.dovecot[41675]: Error: User dump-capability is missing GID (see
mail_gid setting)
org.dovecot[41675]: Fatal: Invalid configuration in /usr/local/etc/
dovecot.conf
com.apple.launchd[1] (org.dovecot[41675]): Exited with exit code: 89
com.apple.launchd[1] (org.dovecot): Throttling respawn: Will start in
10 seconds
... and so on ...
Seems to be related to the checks in create_mail_process(), where it
is relied on a value of -1 as an indicator for "unset".
Now, on OSX, user "nobody" has 4294967294/4294967294 for uid/gid, or
-2/-2; on the other hand, group "nogroup" has a gid equal to
4294967295, or... -1.
Defining some value for mail_gid in dovectot.conf, even if otherwise
not needed, makes above problem disappear.
But again, this is somewhat artificial (the same way I had to create a
system user with an uid/gid set to 65534/65534).
I thus tried this variant:
} else {
/* try to use some existing user. at least osx launchd
doesn't like non-existing users. */
struct passwd *pw;
/* written that way, this could be extended to some other
candidate system users (e.g. daemon?) */
if ( ((pw = getpwnam("nobody")) != NULL)
&& (pw->pw_uid != (uid_t)-1) && (pw->pw_gid !=
(gid_t)-1) )
{
args[0] = t_strdup_printf("uid=%s",
dec2str(pw->pw_uid));
args[1] = t_strdup_printf("gid=%s",
dec2str(pw->pw_gid));
}
}
and dovecot now launched without complaining, even with an unset
mail_gid.
Of course, this "solves" the problem in the precise case of OSX; but
should be OK with, for example, Redhat or Solaris as well.
Sincerely,
Axel
