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, 2 insertions, 1 deletions

diff --git a/src/wc.c b/src/wc.c
index 0bb1929f4..280d7ac88 100644
--- a/src/wc.c
+++ b/src/wc.c
@@ -32,6 +32,7 @@
 #include "quotearg.h"
 #include "readtokens0.h"
 #include "safe-read.h"
+#include "xfreopen.h"
 
 #if !defined iswspace && !HAVE_ISWSPACE
 # define iswspace(wc) \
@@ -486,7 +487,7 @@ wc_file (char const *file, struct fstatus *fstatus)
     {
       have_read_stdin = true;
       if (O_BINARY && ! isatty (STDIN_FILENO))
-	freopen (NULL, "rb", stdin);
+	xfreopen (NULL, "rb", stdin);
       return wc (STDIN_FILENO, file, fstatus);
     }
   else