1 files changed, 37 insertions, 0 deletions
diff --git a/sysvipc/ftok.c b/sysvipc/ftok.c
new file mode 100644
index 0000000000..4ecc3e6822
--- /dev/null
+++ b/sysvipc/ftok.c
@@ -0,0 +1,37 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <sys/ipc.h>
+#include <sys/stat.h>
+
+key_t
+ftok (pathname, proj_id)
+     char *pathname;
+     char proj_id;
+{
+  struct stat st;
+  key_t key;
+
+  if (__stat (pathname, &st) < 0)
+    return (key_t) -1;
+
+  key = (st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) | (id << 24);
+
+  return key;
+}