added two new options "max connections" and "lock file"

[rsync/rsync.git] / util.c

diff --git a/util.c b/util.c
index 346d58a..bcbd8c1 100644 (file)
--- a/util.c
+++ b/util.c
@@ -483,3 +483,20 @@ int name_to_gid(char *name, gid_t *gid)
 }
 
 
+/****************************************************************************
+check if a process exists. 
+****************************************************************************/
+int process_exists(int pid)
+{
+       return(kill(pid,0) == 0 || errno != ESRCH);
+}
+
+int lock_file(int fd)
+{
+       return flock(fd, LOCK_EX) == 0;
+}
+
+int unlock_file(int fd)
+{
+       return flock(fd, LOCK_UN) == 0;
+}