Add in tr and dirname

 -Erik

1 files changed, 146 insertions, 0 deletions

diff --git a/dirname.c b/dirname.c
new file mode 100644
index 000000000..77cb664ac
--- /dev/null
+++ b/dirname.c
@@ -0,0 +1,146 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * This is temporary -- needs to be rewritten to be tighter */
+/*
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if 0
+#ifndef lint
+static char copyright[] = "@(#) Copyright (c) 1991, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif							/* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)dirname.c	8.4 (Berkeley) 5/4/95";
+#endif							/* not lint */
+#endif							/* #if 0 */
+
+#include "internal.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void dirname_usage()
+{
+
+	(void) fprintf(stderr, "usage: dirname path\n");
+	exit(1);
+}
+
+extern int dirname_main(argc, argv)
+int argc;
+char **argv;
+{
+	char *p;
+	int ch;
+
+	while ((ch = getopt(argc, argv, "")) != -1)
+		switch (ch) {
+		case '?':
+		default:
+			dirname_usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+		dirname_usage();
+
+	/*
+	 * (1) If string is //, skip steps (2) through (5).
+	 * (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).
+	 */
+	for (p = *argv;; ++p) {
+		if (!*p) {
+			if (p > *argv)
+				(void) printf("/\n");
+			else
+				(void) printf(".\n");
+			exit(0);
+		}
+		if (*p != '/')
+			break;
+	}
+
+	/*
+	 * (3) If there are any trailing slash characters in string, they
+	 *     shall be removed.
+	 */
+	for (; *p; ++p);
+	while (*--p == '/')
+		continue;
+	*++p = '\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 (--p >= *argv)
+		if (*p == '/')
+			break;
+	++p;
+	if (p == *argv) {
+		(void) printf(".\n");
+		exit(0);
+	}
+
+	/*
+	 * (6) If the remaining string is //, it is implementation defined
+	 *     whether steps (7) and (8) are skipped or processed.
+	 *
+	 * This case has already been handled, as part of steps (1) and (2).
+	 */
+
+	/*
+	 * (7) If there are any trailing slash characters in string, they
+	 *     shall be removed.
+	 */
+	while (--p >= *argv)
+		if (*p != '/')
+			break;
+	++p;
+
+	/*
+	 * (8) If the remaining string is empty, string shall be set to
+	 *     a single slash character.
+	 */
+	*p = '\0';
+	(void) printf("%s\n", p == *argv ? "/" : *argv);
+	exit(0);
+}