From: Jim Meyering <jim@meyering.net>
Date: Wed, 11 Mar 1998 11:53:29 +0000 (+0000)
Subject: (xtmpfopen): Open temporary file exclusively, to
X-Git-Tag: FILEUTILS-3_16n~50
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=7ee8ed7e378e2a5a9495bc17692fc41f266c14ac;p=thirdparty%2Fcoreutils.git

(xtmpfopen): Open temporary file exclusively, to
foil a common denial-of-service attack.
From Paul Eggert.
---

diff --git a/src/sort.c b/src/sort.c
index cbcbff1e72..fd1f4d0a0e 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -346,7 +346,7 @@ xtmpfopen (const char *file)
   FILE *fp;
   int fd;
 
-  fd = open (file, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+  fd = open (file, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600);
   if (fd < 0 || (fp = fdopen (fd, "w")) == NULL)
     {
       error (0, errno, "%s", file);