all: check return value from daemon() call

* */*main.c: (main) Current versions of Gcc warn if the return value for
  daemon() is not checked.  So add a simple test and exit on failure.

9 files changed, 45 insertions, 17 deletions

diff --git a/isisd/isis_main.c b/isisd/isis_main.c
index 2411518d..c5e824c1 100644
--- a/isisd/isis_main.c
+++ b/isisd/isis_main.c
@@ -333,8 +333,11 @@ main (int argc, char **argv, char **envp)
     return(0);
   
   /* demonize */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      zlog_err("ISISd daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* Process ID file creation. */
   pid_output (pid_file);
diff --git a/ospf6d/ospf6_main.c b/ospf6d/ospf6_main.c
index 73d9150e..a7a96a1f 100644
--- a/ospf6d/ospf6_main.c
+++ b/ospf6d/ospf6_main.c
@@ -282,8 +282,11 @@ main (int argc, char *argv[], char *envp[])
   if (dryrun)
     return(0);
   
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      zlog_err("OSPF6d daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* pid file create */
   pid_output (pid_file);
diff --git a/ospfd/ospf_main.c b/ospfd/ospf_main.c
index 2dd997e8..8b9a3458 100644
--- a/ospfd/ospf_main.c
+++ b/ospfd/ospf_main.c
@@ -314,8 +314,11 @@ main (int argc, char **argv)
     return(0);
   
   /* Change to the daemon program. */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      zlog_err("OSPFd daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* Process id file create. */
   pid_output (pid_file);
diff --git a/ripd/rip_main.c b/ripd/rip_main.c
index 0b29107d..57b5f3af 100644
--- a/ripd/rip_main.c
+++ b/ripd/rip_main.c
@@ -292,8 +292,11 @@ main (int argc, char **argv)
     return (0);
   
   /* Change to the daemon program. */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      zlog_err("RIPd daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* Pid file create. */
   pid_output (pid_file);
diff --git a/ripngd/ripng_main.c b/ripngd/ripng_main.c
index f174610d..85209a15 100644
--- a/ripngd/ripng_main.c
+++ b/ripngd/ripng_main.c
@@ -288,8 +288,11 @@ main (int argc, char **argv)
     return(0);
   
   /* Change to the daemon program. */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      zlog_err("RIPNGd daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* Create VTY socket */
   vty_serv_sock (vty_addr, vty_port, RIPNG_VTYSH_PATH);
diff --git a/tests/main.c b/tests/main.c
index edc3b2de..e0fbb4d5 100644
--- a/tests/main.c
+++ b/tests/main.c
@@ -174,8 +174,11 @@ main (int argc, char **argv)
   sort_node ();
 
   /* Change to the daemon program. */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      fprintf(stderr, "daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* Create VTY socket */
   vty_serv_sock (vty_addr, vty_port, "/tmp/.heavy.sock");
diff --git a/watchquagga/watchquagga.c b/watchquagga/watchquagga.c
index f4c483cf..fb628acc 100644
--- a/watchquagga/watchquagga.c
+++ b/watchquagga/watchquagga.c
@@ -1343,7 +1343,11 @@ main(int argc, char **argv)
   if (daemon_mode)
     {
       zlog_set_level(NULL, ZLOG_DEST_SYSLOG, MIN(gs.loglevel,LOG_DEBUG));
-      daemon(0, 0);
+      if (daemon (0, 0) < 0)
+	{
+	  fprintf(stderr, "Watchquagga daemon failed: %s", strerror(errno));
+	  exit (1);
+	}
     }
   else
     zlog_set_level(NULL, ZLOG_DEST_STDOUT, MIN(gs.loglevel,LOG_DEBUG));
diff --git a/zebra/main.c b/zebra/main.c
index 2d6a4ac8..d829c046 100644
--- a/zebra/main.c
+++ b/zebra/main.c
@@ -362,8 +362,11 @@ main (int argc, char **argv)
     exit (0);
 
   /* Daemonize. */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      zlog_err("Zebra daemon failed: %s", strerror(errno));
+      exit (1);
+    }
 
   /* Output pid of zebra. */
   pid_output (pid_file);
diff --git a/zebra/test_main.c b/zebra/test_main.c
index e186fea6..4398a389 100644
--- a/zebra/test_main.c
+++ b/zebra/test_main.c
@@ -308,8 +308,11 @@ main (int argc, char **argv)
     exit (0);
 
   /* Daemonize. */
-  if (daemon_mode)
-    daemon (0, 0);
+  if (daemon_mode && daemon (0, 0) < 0)
+    {
+      perror("daemon start failed");
+      exit (1);
+    }
 
   /* Needed for BSD routing socket. */
   pid = getpid ();