1 files changed, 38 insertions, 0 deletions
diff --git a/libc/misc/sysvipc/ftok.c b/libc/misc/sysvipc/ftok.c
new file mode 100644
index 000000000..06843edda
--- /dev/null
+++ b/libc/misc/sysvipc/ftok.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 1995, 1996 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)
+     const char *pathname;
+     int proj_id;
+{
+  struct stat st;
+  key_t key;
+
+  if (_xstat (_STAT_VER, pathname, &st) < 0)
+    return (key_t) -1;
+
+  key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16)
+	 | ((proj_id & 0xff) << 24));
+
+  return key;
+}