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Code

reduce the possibility of race conditions when using the lock utility

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5297 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2006-10-26 01:32:49 +00:00
parent 99f2f68b6f
commit 81ddc1b91c
1 changed files with 6 additions and 4 deletions
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10
package/busybox/patches/340-lock_util.patch
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@ -33,7 +33,7 @@ diff -ruN busybox-1.2.0-old/miscutils/Config.in busybox-1.2.0-new/miscutils/Conf
diff -ruN busybox-1.2.0-old/miscutils/lock.c busybox-1.2.0-new/miscutils/lock.c
--- busybox-1.2.0-old/miscutils/lock.c 1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.2.0-new/miscutils/lock.c 2006-08-01 10:21:15.000000000 +0200
@@ -0,0 +1,133 @@
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ *
@ -93,9 +93,11 @@ diff -ruN busybox-1.2.0-old/miscutils/lock.c busybox-1.2.0-new/miscutils/lock.c
+ int pid;
+ char pidstr[8];
+
+ if ((fd = open(file, O_RDWR | O_CREAT, 0700)) < 0) {
+ fprintf(stderr, "Can't open %s\n", file);
+ return 1;
+ if ((fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0700)) < 0) {
+ if ((fd = open(file, O_RDWR)) < 0) {
+ fprintf(stderr, "Can't open %s\n", file);
+ return 1;
+ }
+ }
+
+ if (flock(fd, (shared ? LOCK_SH : LOCK_EX)) < 0) {