make pidfile writing configurable.

[ui]toa_to_buf: change API. No users yet.

1 files changed, 16 insertions, 29 deletions

diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index 7b2e19c42..46cc0348f 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -22,47 +22,35 @@ long uptime(void)
         return info.uptime;
 }
 
-
+#if ENABLE_FEATURE_PIDFILE
 static const char *saved_pidfile;
 
 static void pidfile_delete(void)
 {
         if (saved_pidfile)
-                unlink(saved_pidfile);
+                remove_pidfile(saved_pidfile);
 }
+#endif
 
-static int pidfile_acquire(const char *pidfile)
+static void create_pidfile(const char *pidfile)
 {
-        int pid_fd;
-        if (!pidfile) return -1;
+        if (!pidfile)
+                return;
 
-        pid_fd = open(pidfile, O_CREAT|O_WRONLY|O_TRUNC, 0644);
-        if (pid_fd < 0) {
-                bb_perror_msg("cannot open pidfile %s", pidfile);
-        } else {
-                /* lockf(pid_fd, F_LOCK, 0); */
-                if (!saved_pidfile)
-                        atexit(pidfile_delete);
-                saved_pidfile = pidfile;
+        if (!write_pidfile(pidfile)) {
+                bb_perror_msg("cannot create pidfile %s", pidfile);
+                return;
         }
-
-        return pid_fd;
-}
-
-static void pidfile_write_release(int pid_fd)
-{
-        if (pid_fd < 0) return;
-
-        fdprintf(pid_fd, "%d\n", getpid());
-        /* lockf(pid_fd, F_UNLCK, 0); */
-        close(pid_fd);
+#if ENABLE_FEATURE_PIDFILE
+        /* lockf(pid_fd, F_LOCK, 0); */
+        if (!saved_pidfile)
+                atexit(pidfile_delete);
+        saved_pidfile = pidfile;
+#endif
 }
 
-
 void udhcp_make_pidfile(const char *pidfile)
 {
-        int pid_fd;
-
         /* Make sure fd 0,1,2 are open */
         bb_sanitize_stdio();
 
@@ -70,8 +58,7 @@ void udhcp_make_pidfile(const char *pidfile)
         setlinebuf(stdout);
 
         /* Create pidfile */
-        pid_fd = pidfile_acquire(pidfile);
-        pidfile_write_release(pid_fd);
+        create_pidfile(pidfile);
 
         bb_info_msg("%s (v%s) started", applet_name, BB_VER);
 }