From: Todd C. Miller <Todd.Miller@courtesan.com>
Date: Fri, 6 Aug 1999 13:49:26 +0000 (+0000)
Subject: add fcntl locking
X-Git-Tag: SUDO_1_6_0~150
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=68a2b1678125c6ce40dc4c68a14be4f5c28eb4ed;p=sudo

add fcntl locking
---

diff --git a/logging.c b/logging.c
index b5080ffdb..2841fffa5 100644
--- a/logging.c
+++ b/logging.c
@@ -604,7 +604,18 @@ lock_file(fp, lockit)
     FILE *fp;
     int lockit;
 {
-    /* XXX - implement fcntl-style locking */
+#ifdef F_SETLK
+    struct flock lock;
+
+    lock.l_start = 0;
+    lock.l_len = 0;
+    lock.l_pid = getpid();
+    lock.l_type = lockit ? F_WRLCK : F_UNLCK;
+    lock.l_whence = SEEK_SET;
+
+    return(fcntl(fileno(fp), F_SETLKW, &lock) == 0);
+#else
     return(TRUE);
+#endif
 }
 #endif