Fix daemon startup race.

Accepted upstream as SVN rev. 8299
diff -up freeipmi-1.1.1/bmc-watchdog/bmc-watchdog.c.systemd freeipmi-1.1.1/bmc-watchdog/bmc-watchdog.c
--- freeipmi-1.1.1/bmc-watchdog/bmc-watchdog.c.systemd	2012-01-02 20:26:09.000000000 +0100
+++ freeipmi-1.1.1/bmc-watchdog/bmc-watchdog.c	2012-01-06 16:28:55.966295836 +0100
@@ -1677,6 +1677,10 @@ _daemon_init ()
       unsigned int i;
       pid_t pid;
       FILE *pidfile;
+      int fds[2];
+
+      if ( pipe(fds) < 0 )
+        _err_exit ("pipe: %s", strerror (errno));
 
       if ( (pidfile = fopen(BMC_WATCHDOG_PIDFILE, "w")) == NULL )
         _err_exit ("fopen: %s", strerror (errno));
@@ -1684,7 +1688,14 @@ _daemon_init ()
       if ((pid = fork ()) < 0)
         _err_exit ("fork: %s", strerror (errno));
       if (pid)
-        exit (0);                   /* parent terminates */
+        {
+          /* parent terminates */
+          char buf;
+          read(fds[0], &buf, 1);
+          close(fds[1]);
+          close(fds[0]);
+          exit (0);
+        }
 
       setsid ();
 
@@ -1706,6 +1717,9 @@ _daemon_init ()
 
       umask (0);
 
+      write(fds[1], "a", 1);
+      close(fds[1]);
+      close(fds[0]);
       for (i = 0; i < 64; i++)
         close (i);
     }
diff -up freeipmi-1.1.1/ipmidetectd/ipmidetectd.c.systemd freeipmi-1.1.1/ipmidetectd/ipmidetectd.c
--- freeipmi-1.1.1/ipmidetectd/ipmidetectd.c.systemd	2012-01-02 20:26:13.000000000 +0100
+++ freeipmi-1.1.1/ipmidetectd/ipmidetectd.c	2012-01-06 16:28:09.309420665 +0100
@@ -58,12 +58,22 @@ _daemon_init (void)
   /* Based on code in Unix network programming by R. Stevens */
   pid_t pid;
   unsigned int i;
+  int fds[2];
 
+  if (pipe(fds) < 0)
+    IPMIDETECTD_EXIT (("pipe: %s", strerror (errno)));
   if ((pid = fork ()) < 0)
     IPMIDETECTD_EXIT (("fork: %s", strerror (errno)));
 
-  if (pid != 0)                 /* Terminate Parent */
-    exit (0);
+  if (pid != 0)
+    {
+      /* Terminate Parent */
+      char buf;
+      read(fds[0], &buf, 1);
+      close(fds[1]);
+      close(fds[0]);
+      exit (0);
+    }
 
   setsid ();
 
@@ -79,6 +89,9 @@ _daemon_init (void)
   chdir ("/");
 
   umask (0);
+  write(fds[1], "a", 1);
+  close(fds[1]);
+  close(fds[0]);
 
   for (i = 0; i < 64; i++)
     close (i);