signal.c
1.17 KB
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "pop3d.h"
void
pop3d_sigchld (int signo)
{
pid_t pid;
int status;
int old_errno = errno ;
(void)signo;
errno = 0;
while ( (pid = waitpid(-1, &status, WNOHANG)) > 0)
--children;
#ifndef HAVE_SIGACTION
/* On some system, signal implements the unreliabe sematic and
has to be rearm. */
signal (SIGCHLD, pop3d_sigchld);
#endif
errno = old_errno;
}