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/* pidwait.c -- wait for child to exit
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include "h/mh.h"
#include "pidwait.h"
#include <signal.h>
#include "signals.h"
int
pidwait (pid_t id, int sigsok)
{
pid_t pid;
SIGNAL_HANDLER istat = NULL, qstat = NULL;
int status;
if (sigsok == -1) {
/* ignore a couple of signals */
istat = SIGNAL (SIGINT, SIG_IGN);
qstat = SIGNAL (SIGQUIT, SIG_IGN);
}
while ((pid = waitpid(id, &status, 0)) == -1 && errno == EINTR)
;
if (sigsok == -1) {
/* reset the signal handlers */
SIGNAL (SIGINT, istat);
SIGNAL (SIGQUIT, qstat);
}
return pid == -1 ? -1 : status;
}
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