1 files changed, 48 insertions, 0 deletions
diff --git a/libbb/dirname.c b/libbb/dirname.c
new file mode 100644
index 000000000..2e89fc17a
--- /dev/null
+++ b/libbb/dirname.c
@@ -0,0 +1,48 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini dirname function.
+ *
+ * Copyright (C) 2001  Matt Kraai.
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "libbb.h"
+
+/* Return a string on the heap containing the directory component of PATH.  */
+
+char *dirname(const char *path)
+{
+	const char *s;
+
+	/* Go to the end of the string.  */
+	s = path + strlen(path) - 1;
+
+	/* Strip off trailing /s (unless it is also the leading /).  */
+	while (path < s && s[0] == '/')
+		s--;
+
+	/* Strip the last component.  */
+	while (path <= s && s[0] != '/')
+		s--;
+
+	while (path < s && s[0] == '/')
+		s--;
+
+	if (s < path)
+		return xstrdup (".");
+	else
+		return strdup_substr (path, 0, s - path + 1);
+}