From f5c0446975d0e1109a1c15f272f35fd7e20dbf9b Mon Sep 17 00:00:00 2001
From: james <>
Date: Fri, 15 Feb 2008 19:51:30 +0000
Subject: *** empty log message ***

---
 src/lockfile.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)

(limited to 'src/lockfile.c')

diff --git a/src/lockfile.c b/src/lockfile.c
index 9c7acc0..451901c 100644
--- a/src/lockfile.c
+++ b/src/lockfile.c
@@ -10,6 +10,9 @@ static char rcsid[] = "$Id$";
 
 /*
  * $Log$
+ * Revision 1.7  2008/02/15 19:51:30  james
+ * *** empty log message ***
+ *
  * Revision 1.6  2008/02/15 19:09:00  james
  * *** empty log message ***
  *
@@ -426,6 +429,100 @@ lockfile_lock (Filelist * fl)
   return ret;
 }
 
+void
+lockfile_unlock (Filelist * fl)
+{
+
+  while (fl->head)
+    {
+      unlink (fl->head->name);
+      filelist_remove (fl, fl->head);
+    }
+}
+
+
+/* If we have a passive lock, check noone has an */
+/* active one, returns 1 if he does, 0 if he doesnt */
+int
+serial_lock_check (Serial_lock * l)
+{
+  Filelist_ent *fle;
+  int locks_found = 0;
+  struct stat buf;
+  struct timeval now, dif;
+
+  if (l->mode == SERIAL_LOCK_ACTIVE)
+    return 0;
+
+  for (fle = l->locks_to_check; fle; fle = fle->next)
+    {
+      if (!stat (fle->name, &buf))
+        locks_found++;
+    }
+
+  if (!locks_found)
+    return 0;
+
+  getimeofday (&now, NULL);
+  timersub (&now, &l->last_stale_purge, &dif);
+
+  if (dif.tv_sec > STALE_CHECK_INTERVAL)
+    {
+      lockfile_remove_stale (l->locks_to_check);
+      l->last_stale_purge = now;
+    }
+
+  return 1;
+}
+
+Serial_lock void
+serial_lock_free (Serial_lock * l)
+{
+  if (!l)
+    return;
+
+  if (l->locks_held)
+    {
+      lockfile_unlock (l->locks_held);
+      filelist_free (l->locks_held);
+    }
+
+  if (l->locks_to_check)
+    {
+      filelist_free (l->locks_to_check);
+    }
+
+  free (l);
+}
+
+
+Serial_lock *
+serial_lock_new (char *dev, int mode)
+{
+  Filelist *fl = lockfile_make_list (dev);
+
+  if (!fl)
+    return NULL;
+
+  l->mode = mode;
+  l->locks_to_check = fl;
+  l->locks_held = NULL;
+  memset (&l->last_stale_purge, 0, sizeof (l->last_stale_purge));
+
+  if (mode == SERIAL_LOCK_PASSIVE)
+    return l;
+
+  l->locks_held = lockfile_lock (l->locks_to_check);
+  if (!l->locks_held)
+    {
+      serial_lock_free (l);
+      return NULL;
+    }
+
+  return l;
+}
+
+
 #if 1
 int
 main (int argc, char *argv[])
-- 
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