improved max connections code. Now use fcntl instead of flock.

[rsync/rsync.git] / util.c

diff --git a/util.c b/util.c
index bcbd8c1..7d15a8a 100644 (file)
--- a/util.c
+++ b/util.c
@@ -491,12 +491,16 @@ int process_exists(int pid)
        return(kill(pid,0) == 0 || errno != ESRCH);
 }
 
-int lock_file(int fd)
+/* lock a byte range in a open file */
+int lock_range(int fd, int offset, int len)
 {
-       return flock(fd, LOCK_EX) == 0;
-}
+       struct flock lock;
 
-int unlock_file(int fd)
-{
-       return flock(fd, LOCK_UN) == 0;
+       lock.l_type = F_WRLCK;
+       lock.l_whence = SEEK_SET;
+       lock.l_start = offset;
+       lock.l_len = len;
+       lock.l_pid = 0;
+       
+       return fcntl(fd,F_SETLK,&lock) == 0;
 }