1 files changed, 77 insertions, 0 deletions
diff --git a/lib/libc/gen/dirname.c b/lib/libc/gen/dirname.c
new file mode 100644
index 0000000..5a94c1a
--- /dev/null
+++ b/lib/libc/gen/dirname.c
@@ -0,0 +1,77 @@
+/*	$OpenBSD: dirname.c,v 1.13 2005/08/08 08:05:33 espie Exp $	*/
+
+/*
+ * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <errno.h>
+#include <libgen.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+
+char *
+dirname(const char *path)
+{
+	static char *dname = NULL;
+	size_t len;
+	const char *endp;
+
+	if (dname == NULL) {
+		dname = (char *)malloc(MAXPATHLEN);
+		if (dname == NULL)
+			return(NULL);
+	}
+
+	/* Empty or NULL string gets treated as "." */
+	if (path == NULL || *path == '\0') {
+		dname[0] = '.';
+		dname[1] = '\0';
+		return (dname);
+	}
+
+	/* Strip any 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) {
+		dname[0] = *endp == '/' ? '/' : '.';
+		dname[1] = '\0';
+		return (dname);
+	} else {
+		/* Move forward past the separating slashes */
+		do {
+			endp--;
+		} while (endp > path && *endp == '/');
+	}
+
+	len = endp - path + 1;
+	if (len >= MAXPATHLEN) {
+		errno = ENAMETOOLONG;
+		return (NULL);
+	}
+	memcpy(dname, path, len);
+	dname[len] = '\0';
+	return (dname);
+}