void olsr_reconfigure(int signo __attribute__ ((unused))) {
/* if we are started with -nofork, we do not weant to go into the
* background here. So we can simply stop on -HUP
*/
olsr_syslog(OLSR_LOG_INFO, "sot: olsr_reconfigure()\n");
if (!olsr_cnf->no_fork) {
if (!fork()) {
int i;
sigset_t sigs;
/* New process */
sleep(3);
sigemptyset(&sigs);
sigaddset(&sigs, SIGHUP);
sigprocmask(SIG_UNBLOCK, &sigs, NULL);
for (i = sysconf(_SC_OPEN_MAX); --i > STDERR_FILENO;) {
close(i);
}
printf("Restarting %s\n", olsr_argv[0]);
olsr_syslog(OLSR_LOG_INFO, "Restarting %s\n", olsr_argv[0]);
execv(olsr_argv[0], olsr_argv);
olsr_syslog(OLSR_LOG_ERR, "execv(%s) fails: %s!\n", olsr_argv[0],
strerror(errno));
} else {
olsr_syslog(OLSR_LOG_INFO, "RECONFIGURING!\n");
}
}
olsr_shutdown(0);
}
/**
* Write the current PID to the configured PID file (if one is configured)
*/
static void writePidFile(void) {
if (olsr_cnf->pidfile) {
char buf[PATH_MAX + 256];
/* create / open the PID file */
#ifdef __WIN32
mode_t mode = S_IRUSR | S_IWUSR;
#else
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
#endif
int fd = open(olsr_cnf->pidfile, O_CREAT | O_WRONLY, mode);
if (fd < 0) {
snprintf(buf, sizeof(buf), "Could not open PID file %s", olsr_cnf->pidfile);
perror(buf);
olsr_shutdown(0);
}
/* write the PID */
{
pid_t pid = getpid();
int chars = snprintf(buf, sizeof(buf), "%d", pid);
ssize_t chars_written = write(fd, buf, chars);
if (chars_written != chars) {
close(fd);
snprintf(buf, sizeof(buf), "Could not write the PID %d to the PID file %s", pid, olsr_cnf->pidfile);
perror(buf);
if (remove(olsr_cnf->pidfile) < 0) {
snprintf(buf, sizeof(buf), "Could not remove the PID file %s", olsr_cnf->pidfile);
perror(buf);
}
olsr_shutdown(0);
}
}
if (close(fd) < 0) {
snprintf(buf, sizeof(buf), "Could not close PID file %s", olsr_cnf->pidfile);
perror(buf);
if (remove(olsr_cnf->pidfile) < 0) {
snprintf(buf, sizeof(buf), "Could not remove the PID file %s", olsr_cnf->pidfile);
perror(buf);
}
olsr_shutdown(0);
}
}
}
