/* run a command with a limited timeout
tridge@samba.org, June 2005
+ metze@samba.org, March 2006
attempt to be as portable as possible (fighting posix all the way)
*/
static void usage(void)
{
printf("usage: timelimit <time> <command>\n");
- printf(" SIGALRM - passes SIGKILL to command's process group and exit(1)\n");
printf(" SIGUSR1 - passes SIGTERM to command's process group\n");
- printf(" SIGTERM - passes SIGTERM to command's process group and exit(0)\n");
+ printf(" SIGALRM - passes SIGTERM to command's process group\n");
+ printf(" after 5s SIGKILL will be passed and exit(1)\n");
+ printf(" SIGTERM - passes SIGTERM to command's process group\n");
+ printf(" after 1s SIGKILL will be passed and exit(1)\n");
+ printf(" SIGINT - handled like SIGTERM\n");
+ printf(" SIGQUIT - handled like SIGTERM\n");
}
static void sig_alrm_kill(int sig)
static void sig_alrm_term(int sig)
{
+ fprintf(stderr, "\nMaximum time expired in timelimit - sending TERM To child\n");
kill(-child_pid, SIGTERM);
- alarm(5);
signal(SIGALRM, sig_alrm_kill);
+ alarm(5);
}
static void sig_term(int sig)
{
+ fprintf(stderr, "\nReceived TERM/INT/QUIT signal\n");
kill(-child_pid, SIGTERM);
- alarm(1);
signal(SIGALRM, sig_alrm_kill);
+ alarm(1);
}
static void sig_usr1(int sig)
static void new_process_group(void)
{
-#ifdef BSD_SETPGRP
- if (setpgrp(0,0) == -1) {
- perror("setpgrp");
- exit(1);
- }
-#else
- if (setpgrp() == -1) {
- perror("setpgrp");
+ if (setpgid(0,0) == -1) {
+ perror("setpgid");
exit(1);
}
-#endif
}
int main(int argc, char *argv[])
{
int maxtime, ret=1;
- pid_t pgid;
if (argc < 3) {
usage();
}
signal(SIGTERM, sig_term);
+ signal(SIGINT, sig_term);
+ signal(SIGQUIT, sig_term);
signal(SIGUSR1, sig_usr1);
signal(SIGALRM, sig_alrm_term);
alarm(maxtime);
int status;
pid_t pid = wait(&status);
if (pid != -1) {
- ret = WEXITSTATUS(status);
+ if (WIFEXITED(status)) {
+ ret = WEXITSTATUS(status);
+ }
} else if (errno == ECHILD) {
break;
}