On Wed, Apr 18, 2001 at 11:43:40PM +0200, Peter van Dijk wrote:
> On Wed, Apr 18, 2001 at 11:40:38PM +0200, Markus Stumpf wrote:
> > On Wed, Apr 18, 2001 at 02:28:10PM -0700, Michael Werneke wrote:
> > > Apr 17 18:36:05 alpha pop3d: 987557765.365642 tcpserver: end 2010 status 256
> > This is no abnormal termination.
> status 256 is abnormal.
Aehm ...
qmail-pop3d: 987544742.033581 tcpserver: end 65447 status 256
ALL my tcpservers that handle pop3 conns exit like that. They work
fine and without problems for years ...
Startup via:
exec /usr/local/bin/tcpserver -R -v -c 150 \
-l popmail.space.net \
195.30.0.14 pop3 \
/var/qmail/bin/qmail-popup popmail.space.net \
/var/qmail/contrib/checkpassword \
/var/qmail/bin/qmail-pop3d Maildir 2>&1 \
| /var/qmail/bin/splogger qmail-pop3d 17 &
Unmodified qmail-1.03.
Unmodified ucspi-tcp-0.88
FreeBSD 4.2-RELEASE
I have digged through the code, manpages and include files.
Anyone not interested in C code may press 'd' now ;-)
I think the "256" is due to the fact that qmail-popup does:
switch(child = fork()) {
case -1:
die_fork();
case 0:
close(pi[1]);
sig_pipedefault();
execvp(*childargs,childargs);
_exit(1);
}
And also the die() in qmail-popup.c does an _exit(1).
So I'd say that qmail-popup *always* exits with a value of 1 which
maps to a code 256 returned via status by waitpid() (at least on my
system).
Of course unless it receives some signal.
tcpserver.c:
while ((pid = wait_nohang(&wstat)) > 0) {
wait_nohang.c:
return waitpid(-1,wstat,WNOHANG);
from the manpage to waitpid()
pid_t
waitpid(pid_t wpid, int *status, int options)
WIFEXITED(status)
True if the process terminated normally by a call to _exit(2) or
exit(3).
WEXITSTATUS(status)
If WIFEXITED(status) is true, evaluates to the low-order 8 bits
of the argument passed to _exit(2) or exit(3) by the child.
from /usr/include/sys/wait.h
#define _W_INT(i) (i)
#define _WSTATUS(x) (_W_INT(x) & 0177)
#define WIFEXITED(x) (_WSTATUS(x) == 0)
#define WEXITSTATUS(x) (_W_INT(x) >> 8)
So, status 256 would have a WIFEXITED() of true and WEXITSTATUS() should
be "1".
\Maex
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