1 files changed, 47 insertions, 0 deletions
diff --git a/src/lib/libast/preroot/realopen.c b/src/lib/libast/preroot/realopen.c
new file mode 100644
index 0000000..387559b
--- /dev/null
+++ b/src/lib/libast/preroot/realopen.c
@@ -0,0 +1,47 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ * AT&T Bell Laboratories
+ * disable preroot and open path relative to the real root
+ */
+
+#include <ast.h>
+#include <preroot.h>
+
+#if FS_PREROOT
+
+int
+realopen(const char* path, int mode, int perm)
+{
+	char		buf[PATH_MAX + 8];
+
+	if (*path != '/' || !ispreroot(NiL)) return(-1);
+	strcopy(strcopy(buf, PR_REAL), path);
+	return(open(buf, mode, perm));
+}
+
+#else
+
+NoN(realopen)
+
+#endif