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supervise-daemon: do not use the exec_service() function

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In order to run healthcheck() and the unhealthy() function, add an
exec_command call to the supervisor.
Another difference is This function also logs errors instead of
attempting to display them.

This is for #271.
This commit is contained in:
William Hubbs 2018-12-20 17:39:31 -06:00
parent d5c396cbfc
commit 825caa14de
1 changed files with 52 additions and 2 deletions
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54
src/rc/supervise-daemon.c
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@ -267,6 +267,56 @@ static char *make_cmdline(char **argv)
return cmdline;
}
static pid_t exec_command(char *cmd)
{
char *file;
pid_t pid = -1;
sigset_t full;
sigset_t old;
struct sigaction sa;
file = rc_service_resolve(svcname);
if (!exists(file)) {
free(file);
return 0;
}
/* We need to block signals until we have forked */
memset(&sa, 0, sizeof (sa));
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
sigfillset(&full);
sigprocmask(SIG_SETMASK, &full, &old);
pid = fork();
if (pid == 0) {
/* Restore default handlers */
sigaction(SIGCHLD, &sa, NULL);
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGWINCH, &sa, NULL);
/* Unmask signals */
sigprocmask(SIG_SETMASK, &old, NULL);
/* Safe to run now */
execl(file, file, cmd, (char *) NULL);
syslog(LOG_ERR, "unable to exec `%s': %s\n",
file, strerror(errno));
_exit(EXIT_FAILURE);
}
if (pid == -1)
syslog(LOG_ERR, "fork: %s\n",strerror (errno));
sigprocmask(SIG_SETMASK, &old, NULL);
free(file);
return pid;
}
static void child_process(char *exec, char **argv)
{
RC_STRINGLIST *env_list;
@ -537,13 +587,13 @@ static void supervisor(char *exec, char **argv)
do_healthcheck = 0;
alarm(0);
syslog(LOG_DEBUG, "running health check for %s", svcname);
health_pid = exec_service(svcname, "healthcheck");
health_pid = exec_command("healthcheck");
health_status = rc_waitpid(health_pid);
if (WIFEXITED(health_status) && WEXITSTATUS(health_status) == 0)
alarm(healthchecktimer);
else {
syslog(LOG_WARNING, "health check for %s failed", svcname);
health_pid = exec_service(svcname, "unhealthy");
health_pid = exec_command("unhealthy");
rc_waitpid(health_pid);
syslog(LOG_INFO, "stopping %s, pid %d", exec, child_pid);
nkilled = run_stop_schedule(applet, NULL, NULL, child_pid, 0,