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-rw-r--r--examples/loadables/dirname.c119
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diff --git a/examples/loadables/dirname.c b/examples/loadables/dirname.c
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+/* dirname - return directory portion of pathname */
+
+/* See Makefile for compilation details. */
+
+/*
+ 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"
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include "builtins.h"
+#include "shell.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+int
+dirname_builtin (list)
+ WORD_LIST *list;
+{
+ int slen;
+ char *string;
+
+ if (no_options (list))
+ return (EX_USAGE);
+ list = loptend;
+
+ if (list == 0 || list->next)
+ {
+ builtin_usage ();
+ return (EX_USAGE);
+ }
+
+ string = list->word->word;
+ slen = strlen (string);
+
+ /* Strip trailing slashes */
+ while (slen > 0 && string[slen - 1] == '/')
+ slen--;
+
+ /* (2) If string consists entirely of slash characters, string shall be
+ set to a single slash character. In this case, skip steps (3)
+ through (8). */
+ if (slen == 0)
+ {
+ fputs ("/\n", stdout);
+ return (EXECUTION_SUCCESS);
+ }
+
+ /* (3) If there are any trailing slash characters in string, they
+ shall be removed. */
+ string[slen] = '\0';
+
+ /* (4) If there are no slash characters remaining in string, string
+ shall be set to a single period character. In this case, skip
+ steps (5) through (8).
+
+ (5) If there are any trailing nonslash characters in string,
+ they shall be removed. */
+
+ while (--slen >= 0)
+ if (string[slen] == '/')
+ break;
+
+ if (slen < 0)
+ {
+ fputs (".\n", stdout);
+ return (EXECUTION_SUCCESS);
+ }
+
+ /* (7) If there are any trailing slash characters in string, they
+ shall be removed. */
+ while (--slen >= 0)
+ if (string[slen] != '/')
+ break;
+ string[++slen] = '\0';
+
+ /* (8) If the remaining string is empty, string shall be set to a single
+ slash character. */
+ printf ("%s\n", (slen == 0) ? "/" : string);
+ return (EXECUTION_SUCCESS);
+}
+
+char *dirname_doc[] = {
+ "Display directory portion of pathname.",
+ "",
+ "The STRING is converted to the name of the directory containing",
+ "the filename corresponding to the last pathname component in STRING.",
+ (char *)NULL
+};
+
+/* The standard structure describing a builtin command. bash keeps an array
+ of these structures. */
+struct builtin dirname_struct = {
+ "dirname", /* builtin name */
+ dirname_builtin, /* function implementing the builtin */
+ BUILTIN_ENABLED, /* initial flags for builtin */
+ dirname_doc, /* array of long documentation strings. */
+ "dirname string", /* usage synopsis */
+ 0 /* reserved for internal use */
+};