CONFIG_PID_FILE_PATH: new configuration option for pidfile paths

We set a default path for the directory where pidfiles are create
when FEATURE_PIDFILE is selected.  The default has no effect on
applets which must specify a pidfile path on the command line to
run, and it can be overridden by applets which optionally allow
the user to specify the pidfile path.

We also add pidfile write/remove support for klogd, ntpd and watchdog.
For syslogd, we add a missing remove_pidfile() for better cleanup
on daemon exit.

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/sysklogd/klogd.c b/sysklogd/klogd.c
index efa0e537a..f59a155b4 100644
--- a/sysklogd/klogd.c
+++ b/sysklogd/klogd.c
@@ -195,6 +195,8 @@ int klogd_main(int argc UNUSED_PARAM, char **argv)
 
         syslog(LOG_NOTICE, "klogd started: %s", bb_banner);
 
+        write_pidfile(CONFIG_PID_FILE_PATH "/klogd.pid");
+
         used = 0;
         while (!bb_got_signal) {
                 int n;
@@ -258,6 +260,7 @@ int klogd_main(int argc UNUSED_PARAM, char **argv)
 
         klogd_close();
         syslog(LOG_NOTICE, "klogd: exiting");
+        remove_pidfile(CONFIG_PID_FILE_PATH "/klogd.pid");
         if (bb_got_signal)
                 kill_myself_with_sig(bb_got_signal);
         return EXIT_FAILURE;