1 files changed, 25 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libshell/dirname.c b/mdk-stage1/dietlibc/libshell/dirname.c
new file mode 100644
index 000000000..d35e6ea62
--- /dev/null
+++ b/mdk-stage1/dietlibc/libshell/dirname.c
@@ -0,0 +1,25 @@
+#include <string.h>
+#include <libgen.h>
+
+/*
+       path           dirname        basename
+       "/usr/lib"     "/usr"         "lib"
+       "/usr/"        "/"            "usr"
+       "usr"          "."            "usr"
+       "/"            "/"            "/"
+       "."            "."            "."
+       ".."           "."            ".."
+*/
+
+char *dirname(char *path) {
+  char *c;
+again:
+  if (!(c=strrchr(path,'/'))) return ".";
+  while (c[1]==0) {	/* remove trailing slashes */
+    if (c==path) return c;	/* unless path=='/' */
+    *c=0;
+    if (*--c!='/') break;
+  }
+  if (*c=='/') { if (c!=path) *c=0; return path; }
+  goto again;
+}