diff options
| -rw-r--r-- | lib/libutil/pidfile.3 | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/libutil/pidfile.3 b/lib/libutil/pidfile.3 index f04522d..4895975 100644 --- a/lib/libutil/pidfile.3 +++ b/lib/libutil/pidfile.3 @@ -105,14 +105,24 @@ will be set. .Rv -std pidfile_write pidfile_close pidfile_remove .Sh EXAMPLES The following example shows in which order these functions should be used. +Note that it is safe to pass +.Dv NULL +to +.Fn pidfile_write , +.Fn pidfile_remove +and +.Fn pidfile_close +functions. .Bd -literal struct pidfh *pfh; pid_t otherpid, childpid; pfh = pidfile_open("/var/run/daemon.pid", 0600, &otherpid); if (pfh == NULL) { - if (errno == EEXIST) - errx(EXIT_FAILURE, "Daemon already running, pid: %d.", otherpid); + if (errno == EEXIST) { + errx(EXIT_FAILURE, "Daemon already running, pid: %d.", + (int)otherpid); + } /* If we cannot create pidfile from other reasons, only warn. */ warn("Cannot open or create pidfile"); } @@ -137,7 +147,7 @@ for (;;) { /* Do child work. */ break; default: - syslog(LOG_INFO, "Child %d started.", childpid); + syslog(LOG_INFO, "Child %d started.", (int)childpid); break; } } |
