From 355bb561f315d2a018c85c311e1442e16456a4e5 Mon Sep 17 00:00:00 2001
From: des <des@FreeBSD.org>
Date: Thu, 31 Aug 2000 15:56:15 +0000
Subject: Import XPG4-compliant basename(3) and dirname(3) from OpenBSD. The
 man pages need some adjustments.

PR:		12960, 12962
Submitted by:	James Howard <howardjp@wam.umd.edu>
Obtained from:	OpenBSD
---
 lib/libc/gen/dirname.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 lib/libc/gen/dirname.c

(limited to 'lib/libc/gen/dirname.c')

diff --git a/lib/libc/gen/dirname.c b/lib/libc/gen/dirname.c
new file mode 100644
index 0000000..5f6019e
--- /dev/null
+++ b/lib/libc/gen/dirname.c
@@ -0,0 +1,79 @@
+/*	$OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $	*/
+/*	$FreeBSD$	*/
+
+/*
+ * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
+ */
+
+#ifndef lint
+static char rcsid[] = "$OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $";
+#endif /* not lint */
+
+#include <errno.h>
+#include <libgen.h>
+#include <string.h>
+#include <sys/param.h>
+
+char *
+dirname(path)
+	const char *path;
+{
+	static char bname[MAXPATHLEN];
+	register const char *endp;
+
+	/* Empty or NULL string gets treated as "." */
+	if (path == NULL || *path == '\0') {
+		(void)strcpy(bname, ".");
+		return(bname);
+	}
+
+	/* Strip trailing slashes */
+	endp = path + strlen(path) - 1;
+	while (endp > path && *endp == '/')
+		endp--;
+
+	/* Find the start of the dir */
+	while (endp > path && *endp != '/')
+		endp--;
+
+	/* Either the dir is "/" or there are no slashes */
+	if (endp == path) {
+		(void)strcpy(bname, *endp == '/' ? "/" : ".");
+		return(bname);
+	} else {
+		do {
+			endp--;
+		} while (endp > path && *endp == '/');
+	}
+
+	if (endp - path + 1 > sizeof(bname)) {
+		errno = ENAMETOOLONG;
+		return(NULL);
+	}
+	(void)strncpy(bname, path, endp - path + 1);
+	bname[endp - path + 1] = '\0';
+	return(bname);
+}
-- 
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