use xfreopen in place of unchecked freopen

* bootstrap.conf (modules): Add xfreopen.
* src/cat.c (main): Include "xfreopen.h".  Use xfreopen.
* src/cksum.c (cksum): Likewise.
* src/head.c (head_file, main): Likewise.
* src/md5sum.c (digest_file): Likewise.
* src/od.c (open_next_file): Likewise.
* src/split.c (type_undef): Likewise.
* src/sum.c (bsd_sum_file, sysv_sum_file): Likewise.
* src/tac.c (tac_file, main): Likewise.
* src/tail.c (tail_file, main): Likewise.
* src/tee.c (tee_files): Likewise.
* src/tr.c (main): Likewise.
* src/wc.c (wc_file): Likewise.
* po/POTFILES.in: Add lib/xfreopen.c

1 files changed, 3 insertions, 2 deletions

diff --git a/src/tr.c b/src/tr.c
index 0f94eef84..f4b531731 100644
--- a/src/tr.c
+++ b/src/tr.c
@@ -27,6 +27,7 @@
 #include "error.h"
 #include "quote.h"
 #include "safe-read.h"
+#include "xfreopen.h"
 #include "xstrtol.h"
 
 /* The official name of this program (e.g., no `g' prefix).  */
@@ -1750,9 +1751,9 @@ main (int argc, char **argv)
      non-printable characters, or characters which are stripped away
      by text-mode reads (like CR and ^Z).  */
   if (O_BINARY && ! isatty (STDIN_FILENO))
-    freopen (NULL, "rb", stdin);
+    xfreopen (NULL, "rb", stdin);
   if (O_BINARY && ! isatty (STDOUT_FILENO))
-    freopen (NULL, "wb", stdout);
+    xfreopen (NULL, "wb", stdout);
 
   if (squeeze_repeats && non_option_args == 1)
     {