1 files changed, 50 insertions, 0 deletions

diff --git a/lib/pipe-safer.c b/lib/pipe-safer.c
new file mode 100644
index 0000000..fb02d72
--- /dev/null
+++ b/lib/pipe-safer.c
@@ -0,0 +1,50 @@
+/* Invoke pipe, but avoid some glitches.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Jim Meyering.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "unistd-safer.h"
+
+#include <unistd.h>
+
+/* Like pipe, but ensure that neither of the file descriptors is
+   STDIN_FILENO, STDOUT_FILENO, or STDERR_FILENO.  */
+
+int
+pipe_safer (int fd[2])
+{
+  int fail = pipe (fd);
+  if (fail)
+    return fail;
+
+  {
+    int i;
+    for (i = 0; i < 2; i++)
+      {
+        int f = fd_safer (fd[i]);
+        if (f < 0)
+          return -1;
+        fd[i] = f;
+      }
+  }
+
+  return 0;
+}