From 487ca4806cc046076293cf6cc5fbba0db282bac7 Mon Sep 17 00:00:00 2001
From: Karl Berry <karl@freefriends.org>
Date: Tue, 17 Jan 2006 21:41:51 +0000
Subject: texk 1

git-svn-id: svn://tug.org/texlive/trunk@1485 c570f23f-e606-0410-a88d-b1316a301751
---
 Build/source/texk/kpathsea/access.c | 93 +++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 Build/source/texk/kpathsea/access.c

(limited to 'Build/source/texk/kpathsea/access.c')

diff --git a/Build/source/texk/kpathsea/access.c b/Build/source/texk/kpathsea/access.c
new file mode 100644
index 00000000000..ca1cee5722e
--- /dev/null
+++ b/Build/source/texk/kpathsea/access.c
@@ -0,0 +1,93 @@
+/* access -- test for access permissions of a file.
+
+   Copyright 1997-2001, 2005 Olaf Weber.
+
+   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 of the License, 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 St, Fifth Floor, Boston, MA  02110-1301 USA
+
+*/
+
+#include <stdio.h>
+#include <kpathsea/config.h>
+#include <kpathsea/c-unistd.h>
+#include <kpathsea/c-memstr.h>
+
+/*
+ *      access mode x
+ *      Returns 0 is x exists and can be accessed in accordance with mode.
+ *      We use this rather than test because test looks at the permissions
+ *      only, which doesn't take read-only file systems into account.
+ */
+
+int
+main P2C(int, argc, char **, argv)
+{
+    int mode;
+    int status;
+    char * i;
+
+    if (argc > 1 && strcmp (argv[1], "--help") == 0) {
+        printf("Usage: %s -MODE FILE\n\
+  MODE is one or more of rwx.  Exit successfully if FILE exists and is\n\
+  readable (r), writable (w), or executable (x).\n\
+\n\
+--help      display this help and exit\n\
+--version   output version information and exit\n\n", argv[0]);
+        fputs ("Email bug reports to tex-k@mail.tug.org.\n", stdout);
+        exit(0);
+    } else if (argc > 1 && strcmp (argv[1], "--version") == 0) {
+        printf ("%s (%s)\n\
+Copyright (C) 1997 Olaf Weber.\n\
+There is NO warranty.  You may redistribute this software\n\
+under the terms of the GNU General Public License\n\
+For more information about these matters, see the file named COPYING.\n\
+Primary author of %s: Olaf Weber.\n",
+argv[0], KPSEVERSION, argv[0]);
+        exit (0);
+    }
+
+    /* insist on exactly two args */
+    if (argc != 3) {
+        fprintf(stderr, "%s: Need exactly two arguments.\n\
+Try `%s --help' for more information.\n", argv[0], argv[0]);
+        exit(1);
+    }
+
+    /* The option parsing is somewhat primitive: '-' need not be the first
+     * character of the mode.  The mode must be specified in a single
+     * option.  Both of these may change.
+     */
+    mode = 0;
+    i = argv[1];
+    for (i = argv[1]; *i; ++i)
+        switch (*i) {
+        case 'r': mode |= R_OK; break;
+        case 'w': mode |= W_OK; break;
+        case 'x': mode |= X_OK; break;
+        case '-': if (i == argv[1]) break;
+        default:
+            fprintf(stderr, "%s: Invalid MODE.\n", argv[0]);
+            exit(1);
+        }
+    
+    status = access(argv[2], mode);
+        
+    /* fail if the access call failed */
+    if (status != 0) {
+        return 1;
+    }
+    
+    /* otherwise, succeed */
+    return 0;
+}
-- 
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