Date: Tue, 16 Nov 1999 05:30:02 -0800 (PST) From: "Jonathan M. Bresler" <jmb@hub.freebsd.org> To: freebsd-bugs@FreeBSD.org Subject: i386/14689: waitpid doesn't harvest child process when Message-ID: <199911161330.FAA20808@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR i386/14689; it has been noted by GNATS.
From: "Jonathan M. Bresler" <jmb@hub.freebsd.org>
To: freebsd-gnats-submit@freebsd.org
Cc: wpk@isc.org
Subject: i386/14689: waitpid doesn't harvest child process when
Date: Tue, 16 Nov 1999 05:23:58 -0800 (PST)
program run under cron
Bill,
Thanks for the code snippet. I am going to add the code and
the results of running it to the bug tracking system.
jmb
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
run from an xterm:
baby:[215] ./x
child 26962, deadpid 26962, errno 0, T_int 0
deadpid == child
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
run from cron
child 26951, deadpid -1, errno 4, T_int 14
terminating child
child 26951, deadpid 26951, errno 3, T_int 0
deadpid == child
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Example Code:
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#define T_TIMEOUT 60
static int T_timeout;
static int T_int;
static void t_sighandler();
static void
t_sighandler(int sig) {
T_int = sig;
}
int
main(int argc, char **argv)
{
pid_t child;
pid_t deadpid;
int status;
struct sigaction sa;
T_timeout = T_TIMEOUT;
/* setup signals */
sa.sa_flags = 0;
sigfillset(&sa.sa_mask);
sa.sa_handler = t_sighandler;
(void) sigaction(SIGALRM, &sa, NULL);
(void) sigaction(SIGINT, &sa, NULL);
setbuf(stdout, NULL);
child = fork();
if (child == 0) {
sleep(10);
exit(0);
}
else if (child > 0) {
T_int = 0;
sa.sa_handler = t_sighandler;
(void) sigaction(SIGALRM, &sa, NULL);
alarm(T_timeout);
deadpid = (pid_t) -1;
while (deadpid != child) {
deadpid = waitpid(child, &status, 0);
printf("child %d, deadpid %d, errno %d, T_int %d\n",
child, deadpid, errno, T_int);
if (deadpid == child) {
printf("deadpid == child\n");
if (WIFSIGNALED(status)) {
if (WTERMSIG(status) == SIGTERM)
printf("the test case timed out\n");
else
printf("the test case caused exception %d\n",
WTERMSIG(status));
}
}
else if ((deadpid == -1) && (errno == EINTR) && T_int) {
printf("terminating child\n");
kill(child, SIGTERM);
T_int = 0;
}
else if ((deadpid == -1) &&
((errno == ECHILD) || (errno == ESRCH))) {
printf("no such process\n");
break;
}
}
sa.sa_handler = SIG_IGN;
(void) sigaction(SIGALRM, &sa, NULL);
alarm(0);
}
else {
printf("fork failed, errno == %d\n", errno);
}
return(0);
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199911161330.FAA20808>