Be slightly safer opening temp files.

2 files changed, 16 insertions, 10 deletions

diff --git a/usr.bin/patch/patch.c b/usr.bin/patch/patch.c
index dfbe51cba76..afb9b7307a6 100644
--- a/usr.bin/patch/patch.c
+++ b/usr.bin/patch/patch.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: patch.c,v 1.4 1996/07/01 20:40:09 deraadt Exp $	*/
+/*	$OpenBSD: patch.c,v 1.5 1996/09/15 19:19:54 millert Exp $	*/
 
 /* patch - a program to apply diffs to original files
  *
@@ -9,7 +9,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$OpenBSD: patch.c,v 1.4 1996/07/01 20:40:09 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: patch.c,v 1.5 1996/09/15 19:19:54 millert Exp $";
 #endif /* not lint */
 
 #include "INTERN.h"
@@ -784,8 +784,10 @@ void
 init_output(name)
 char *name;
 {
-    ofp = fopen(name, "w");
-    if (ofp == Nullfp)
+    int ofd;
+
+    if ((ofd = open(name, O_CREAT|O_EXCL|O_WRONLY, 0600)) < 0 ||
+	(ofp = fdopen(ofd, "w")) == Nullfp)
 	pfatal2("can't create %s", name);
 }
 
@@ -795,8 +797,10 @@ void
 init_reject(name)
 char *name;
 {
-    rejfp = fopen(name, "w");
-    if (rejfp == Nullfp)
+    int rejfd;
+
+    if ((rejfd = open(name, O_CREAT|O_EXCL|O_WRONLY, 0600)) < 0 ||
+	(rejfp = fdopen(rejfd, "w")) == Nullfp)
 	pfatal2("can't create %s", name);
 }
 
diff --git a/usr.bin/patch/pch.c b/usr.bin/patch/pch.c
index 38225fa648a..33fbb2ec3aa 100644
--- a/usr.bin/patch/pch.c
+++ b/usr.bin/patch/pch.c
@@ -1,7 +1,7 @@
-/*	$OpenBSD: pch.c,v 1.4 1996/07/01 20:40:10 deraadt Exp $	*/
+/*	$OpenBSD: pch.c,v 1.5 1996/09/15 19:19:52 millert Exp $	*/
 
 #ifndef lint
-static char rcsid[] = "$OpenBSD: pch.c,v 1.4 1996/07/01 20:40:10 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: pch.c,v 1.5 1996/09/15 19:19:52 millert Exp $";
 #endif /* not lint */
 
 #include "EXTERN.h"
@@ -55,8 +55,10 @@ open_patch_file(filename)
 char *filename;
 {
     if (filename == Nullch || !*filename || strEQ(filename, "-")) {
-	pfp = fopen(TMPPATNAME, "w");
-	if (pfp == Nullfp)
+	int pfd;
+
+	if ((pfd = open(TMPPATNAME, O_CREAT|O_EXCL|O_WRONLY, 0600)) < 0 ||
+	    (pfp = fdopen(pfd, "w")) == Nullfp)
 	    pfatal2("can't create %s", TMPPATNAME);
 	while (fgets(buf, sizeof buf, stdin) != Nullch)
 	    fputs(buf, pfp);