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-rw-r--r--examples/loadables/realpath.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/examples/loadables/realpath.c b/examples/loadables/realpath.c
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+++ b/examples/loadables/realpath.c
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+/*
+ * realpath -- canonicalize pathnames, resolving symlinks
+ *
+ * usage: realpath [-csv] pathname [pathname...]
+ *
+ * options: -c check whether or not each resolved path exists
+ * -s no output, exit status determines whether path is valid
+ * -v produce verbose output
+ *
+ *
+ * exit status: 0 if all pathnames resolved
+ * 1 if any of the pathname arguments could not be resolved
+ *
+ *
+ * Bash loadable builtin version
+ *
+ * Chet Ramey
+ * chet@po.cwru.edu
+ */
+
+/*
+ Copyright (C) 1999-2009 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash.
+ Bash 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 3 of the License, or
+ (at your option) any later version.
+
+ Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#include "bashansi.h"
+#include <maxpath.h>
+#include <errno.h>
+
+#include "builtins.h"
+#include "shell.h"
+#include "bashgetopt.h"
+#include "common.h"
+
+#ifndef errno
+extern int errno;
+#endif
+
+extern char *sh_realpath();
+
+realpath_builtin(list)
+WORD_LIST *list;
+{
+ int opt, cflag, vflag, sflag, es;
+ char *r, realbuf[PATH_MAX], *p;
+ struct stat sb;
+
+ if (list == 0) {
+ builtin_usage();
+ return (EX_USAGE);
+ }
+
+ vflag = cflag = sflag = 0;
+ reset_internal_getopt();
+ while ((opt = internal_getopt (list, "csv")) != -1) {
+ switch (opt) {
+ case 'c':
+ cflag = 1;
+ break;
+ case 's':
+ sflag = 1;
+ break;
+ case 'v':
+ vflag = 1;
+ break;
+ default:
+ builtin_usage();
+ }
+ }
+
+ list = loptend;
+
+ if (list == 0)
+ builtin_usage();
+
+ for (es = EXECUTION_SUCCESS; list; list = list->next) {
+ p = list->word->word;
+ r = sh_realpath(p, realbuf);
+ if (r == 0) {
+ es = EXECUTION_FAILURE;
+ if (sflag == 0)
+ builtin_error("%s: cannot resolve: %s", p, strerror(errno));
+ continue;
+ }
+ if (cflag && (stat(realbuf, &sb) < 0)) {
+ es = EXECUTION_FAILURE;
+ if (sflag == 0)
+ builtin_error("%s: %s", p, strerror(errno));
+ continue;
+ }
+ if (sflag == 0) {
+ if (vflag)
+ printf ("%s -> ", p);
+ printf("%s\n", realbuf);
+ }
+ }
+ return es;
+}
+
+char *realpath_doc[] = {
+ "Display pathname in canonical form.",
+ "",
+ "Display the canonicalized version of each PATHNAME argument, resolving",
+ "symbolic links. The -c option checks whether or not each resolved name",
+ "exists. The -s option produces no output; the exit status determines the",
+ "valididty of each PATHNAME. The -v option produces verbose output. The",
+ "exit status is 0 if each PATHNAME was resolved; non-zero otherwise.",
+ (char *)NULL
+};
+
+struct builtin realpath_struct = {
+ "realpath", /* builtin name */
+ realpath_builtin, /* function implementing the builtin */
+ BUILTIN_ENABLED, /* initial flags for builtin */
+ realpath_doc, /* array of long documentation strings */
+ "realpath [-csv] pathname [pathname...]", /* usage synopsis */
+ 0 /* reserved for internal use */
+};