/*
* $Log$
+ * Revision 1.9 2008/02/15 23:52:12 james
+ * *** empty log message ***
+ *
+ * Revision 1.8 2008/02/15 20:52:36 james
+ * *** empty log message ***
+ *
+ * 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 ***
*
#define LOCK_ASCII
#undef LOCK_BINARY
+#define STALE_CHECK_INTERVAL 10
+
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
+#include <time.h>
+#include <sys/time.h>
#include "lockfile.h"
char *lock_dirs[] =
{ "/var/lock/uucp", "/var/spool/lock", "/var/spool/uucp", "/etc/locks",
"/usr/spool/uucp", "/var/spool/locks", "/usr/spool/lock",
- "/usr/spool/locks", "/usr/spool/uucp/LCK"
+ "/usr/spool/locks", "/usr/spool/uucp/LCK", "/var/lock"
};
int i;
return ret;
}
-#if 1
+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->head; fle; fle = fle->next)
+ {
+ if (!stat (fle->name, &buf))
+ locks_found++;
+ }
+
+ if (!locks_found)
+ return 0;
+
+ gettimeofday (&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;
+}
+
+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);
+ Serial_lock *l;
+
+ if (!fl)
+ return NULL;
+
+ l = (Serial_lock *) malloc (sizeof (Serial_lock));
+
+ 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 0
int
main (int argc, char *argv[])
{