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authorKarl Berry <karl@freefriends.org>2006-01-17 21:41:51 +0000
committerKarl Berry <karl@freefriends.org>2006-01-17 21:41:51 +0000
commit487ca4806cc046076293cf6cc5fbba0db282bac7 (patch)
tree847b412ab5158dd7bdd7ed7e5a4cc3fbca94be32 /Build/source/texk/kpathsea/access.c
parenta3d3111bfe26b8e5f5bc6049dfb2a4ca2edc7881 (diff)
texk 1
git-svn-id: svn://tug.org/texlive/trunk@1485 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/kpathsea/access.c')
-rw-r--r--Build/source/texk/kpathsea/access.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/Build/source/texk/kpathsea/access.c b/Build/source/texk/kpathsea/access.c
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+++ b/Build/source/texk/kpathsea/access.c
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+/* 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;
+}