--- gvpe/src/util.C	2003/10/14 15:48:15	1.8
+++ gvpe/src/util.C	2005/04/08 16:12:49	1.20
@@ -1,9 +1,12 @@
 /*
     util.C -- process management and other utility functions
+    Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
     
     Some of these are taken from tinc, see the AUTHORS file.
  
-    This program is free software; you can redistribute it and/or modify
+    This file is part of GVPE.
+
+    GVPE is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
@@ -14,13 +17,14 @@
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
+    along with gvpe; if not, write to the Free Software
     Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
 #include "config.h"
 
 #include <cstdio>
+#include <cstdlib>
 #include <cstring>
 
 #include <errno.h>
@@ -30,8 +34,6 @@
 #include <unistd.h>
 #include <time.h>
 
-#include <sys/mman.h>
-
 #include "netcompat.h"
 
 #include "gettext.h"
@@ -48,16 +50,16 @@
 {
   int pid;
 
-  pid = check_pid (pidfilename);
+  pid = check_pid (conf.pidfilename);
 
   if (pid)
     {
-      fprintf (stderr, _("A vped is already running with pid %d.\n"), pid);
+      fprintf (stderr, _("A gvpe daemon is already running with pid %d.\n"), pid);
       return 1;
     }
 
   /* if it's locked, write-protected, or whatever */
-  if (!write_pid (pidfilename))
+  if (!write_pid (conf.pidfilename))
     return 1;
 
   return 0;
@@ -68,11 +70,11 @@
 {
   int pid;
 
-  pid = read_pid (pidfilename);
+  pid = read_pid (conf.pidfilename);
 
   if (!pid)
     {
-      fprintf (stderr, _("No other vped is running.\n"));
+      fprintf (stderr, _("No other gvpe daemon is running.\n"));
       return 1;
     }
 
@@ -81,10 +83,10 @@
   /* ESRCH is returned when no process with that pid is found */
   if (kill (pid, signal) && errno == ESRCH)
     {
-      fprintf (stderr, _("The vped is no longer running. "));
+      fprintf (stderr, _("The gvpe daemon is no longer running. "));
 
       fprintf (stderr, _("Removing stale lock file.\n"));
-      remove_pid (pidfilename);
+      remove_pid (conf.pidfilename);
     }
 
   return 0;
@@ -114,7 +116,7 @@
 
       /* Now UPDATE the pid in the pidfile, because we changed it... */
 
-      if (!write_pid (pidfilename))
+      if (!write_pid (conf.pidfilename))
         return -1;
 
       log_to (LOGTO_SYSLOG);
@@ -122,40 +124,53 @@
   else
     log_to (LOGTO_SYSLOG | LOGTO_STDERR);
 
-  slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__);
+  slog (L_INFO, _("gvpe daemon %s (%s %s) starting"), VERSION, __DATE__, __TIME__);
 
   return 0;
 }
 
-void
-make_names (void)
+bool run_script (const run_script_cb &cb, bool wait)
 {
-  if (!pidfilename)
-    pidfilename = LOCALSTATEDIR "/run/vped.pid";
+  if (wait)
+    signal (SIGCHLD, SIG_DFL); // this is extremely ugly, but I did not feel like implementing a complete wait() event logic. It's easier to write this long comment to make your editor happy.
 
-  if (!confbase)
-    asprintf (&confbase, "%s/vpe", CONFDIR);
-}
-
-void run_script (const run_script_cb &cb, bool wait)
-{
-  int pid;
+  int pid = fork ();
 
-  if ((pid = fork ()) == 0)
+  if (pid == 0)
     {
-      char *filename;
-      asprintf (&filename, "%s/%s", confbase, cb());
-      execl (filename, filename, (char *) 0);
-      exit (255);
+      execl ("/bin/sh", "/bin/sh", "-c", cb (), (char *) 0);
+      exit (EXIT_FAILURE);
     }
   else if (pid > 0)
     {
       if (wait)
         {
-          waitpid (pid, 0, 0);
-          /* TODO: check status */
+          int status;
+          int res = waitpid (pid, &status, 0);
+
+          signal (SIGCHLD, SIG_IGN);
+
+          if (res < 0)
+            {
+              slog (L_WARN, _("waiting for an external command failed: %s."),
+                    strerror (errno));
+              return false;
+            }
+          else if (!WIFEXITED (status) || WEXITSTATUS (status) != EXIT_SUCCESS)
+            {
+              slog (L_WARN, _("external command returned with exit status %d (%04x)."),
+                    WEXITSTATUS (status), status);
+              return false;
+            }
         }
     }
+  else
+    {
+      slog (L_ERR, _("unable to fork, exiting: %s"), strerror (errno));
+      exit (EXIT_FAILURE);
+    }
+
+  return true;
 }
 
 #if ENABLE_HTTP_PROXY
@@ -206,3 +221,28 @@
 }
 #endif
 
+void
+id2mac (unsigned int id, void *m)
+{
+  mac &p = *(mac *)m;
+
+  if (id)
+    {
+      p[0] = 0xfe;
+      p[1] = 0xfd;
+      p[2] = 0x80;
+      p[3] = 0x00;
+      p[4] = id >> 8;
+      p[5] = id;
+    }
+  else
+    {
+      p[0] = 0xff;
+      p[1] = 0xff;
+      p[2] = 0xff;
+      p[3] = 0xff;
+      p[4] = 0xff;
+      p[5] = 0xff;
+    }
+}
+