Permalink
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
78 lines (67 sloc) 1.2 KB
#include "apue.h"
#include <syslog.h>
#include <errno.h>
extern int lockfile(int);
extern int already_running(void);
void
reread(void)
{
/* ... */
}
void
sigterm(int signo)
{
syslog(LOG_INFO, "got SIGTERM; exiting");
exit(0);
}
void
sighup(int signo)
{
syslog(LOG_INFO, "Re-reading configuration file");
reread();
}
int
main(int argc, char *argv[])
{
char *cmd;
struct sigaction sa;
if ((cmd = strrchr(argv[0], '/')) == NULL)
cmd = argv[0];
else
cmd++;
/*
* Become a daemon.
*/
daemonize(cmd);
/*
* Make sure only one copy of the daemon is running.
*/
if (already_running()) {
syslog(LOG_ERR, "daemon already running");
exit(1);
}
/*
* Handle signals of interest.
*/
sa.sa_handler = sigterm;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGHUP);
sa.sa_flags = 0;
if (sigaction(SIGTERM, &sa, NULL) < 0) {
syslog(LOG_ERR, "can't catch SIGTERM: %s", strerror(errno));
exit(1);
}
sa.sa_handler = sighup;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGTERM);
sa.sa_flags = 0;
if (sigaction(SIGHUP, &sa, NULL) < 0) {
syslog(LOG_ERR, "can't catch SIGHUP: %s", strerror(errno));
exit(1);
}
/*
* Proceed with the rest of the daemon.
*/
/* ... */
exit(0);
}