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-rw-r--r--Build/source/texk/kpathsea/access.c95
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diff --git a/Build/source/texk/kpathsea/access.c b/Build/source/texk/kpathsea/access.c
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+/* access -- test for access permissions of a file.
+
+ Copyright 2008, 2009-2019 Karl Berry.
+ 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 software; if not, see <http://www.gnu.org/licenses/>. */
+
+#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 (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@tug.org.\n", stdout);
+ exit(0);
+ } else if (argc > 1 && strcmp (argv[1], "--version") == 0) {
+ printf ("%s (%s)\n\
+Copyright (C) 2009 Olaf Weber & Karl Berry.\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. The mode must be
+ * specified as a single parameter: an optional '-' followed by
+ * zero or more letters 'r', 'w', or 'x'. This 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;
+#if defined(_WIN32)
+/* access() crashes for unsupported test of x bit */
+ case 'x': break;
+#else
+ case 'x': mode |= X_OK; break;
+#endif
+ 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;
+}