1 files changed, 69 insertions, 0 deletions
diff --git a/src/lib/libast/path/pathaccess.c b/src/lib/libast/path/pathaccess.c
new file mode 100644
index 0000000..7bbec12
--- /dev/null
+++ b/src/lib/libast/path/pathaccess.c
@@ -0,0 +1,69 @@
+/***********************************************************************
+*                                                                      *
+*               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
+/*
+ * Glenn Fowler
+ * AT&T Bell Laboratories
+ *
+ * return path to file a/b with access mode using : separated dirs
+ * both a and b may be 0
+ * if a==".." then relative paths in dirs are ignored
+ * if (mode&PATH_REGULAR) then path must not be a directory
+ * if (mode&PATH_ABSOLUTE) then path must be rooted
+ * path returned in path buffer
+ */
+
+#define _AST_API_H	1
+
+#include <ast.h>
+
+char*
+pathaccess(char* path, const char* dirs, const char* a, const char* b, int mode)
+{
+	return pathaccess_20100601(dirs, a, b, mode, path, PATH_MAX);
+}
+
+#undef	_AST_API_H
+
+#include <ast_api.h>
+
+char*
+pathaccess_20100601(register const char* dirs, const char* a, const char* b, register int mode, register char* path, size_t size)
+{
+	int		sib = a && a[0] == '.' && a[1] == '.' && a[2] == 0;
+	int		sep = ':';
+	char		cwd[PATH_MAX];
+
+	do
+	{
+		dirs = pathcat(dirs, sep, a, b, path, size);
+		pathcanon(path, size, 0);
+		if ((!sib || *path == '/') && pathexists(path, mode))
+		{
+			if (*path == '/' || !(mode & PATH_ABSOLUTE))
+				return path;
+			dirs = getcwd(cwd, sizeof(cwd));
+			sep = 0;
+		}
+	} while (dirs);
+	return 0;
+}