move dirname() and basename() to lib/libgen.c and add header file

include/libgen.h

@@ -0,0 +1,8 @@
+#ifndef __LIBGEN_H
+#define __LIBGEN_H
+
+char *basename (char *path);
+char *dirname (char *path);
+
+#endif /* __LIBGEN_H */
+

lib/libgen.c

@@ -0,0 +1,26 @@
+
+char *basename (char *path)
+{
+	char *fname;
+
+	fname = path + strlen(path) - 1;
+	while (fname >= path) {
+		if (*fname == '/') {
+			fname++;
+			break;
+		}
+		fname--;
+	}
+	return fname;
+}
+
+char *dirname (char *path)
+{
+	char *fname;
+
+	fname = basename (path);
+	--fname;
+	*fname = '\0';
+	return path;
+}
+

net/nfs.c

@@ -27,6 +27,7 @@
 #include <clock.h>
 #include <net.h>
 #include <malloc.h>
+#include <libgen.h>
 #include "nfs.h"
 #include "bootp.h"
 
@@ -75,33 +76,6 @@ store_block (uchar * src, unsigned offset, unsigned len)
 	return 0;
 }
 
-static char*
-basename (char *path)
-{
-	char *fname;
-
-	fname = path + strlen(path) - 1;
-	while (fname >= path) {
-		if (*fname == '/') {
-			fname++;
-			break;
-		}
-		fname--;
-	}
-	return fname;
-}
-
-static char*
-dirname (char *path)
-{
-	char *fname;
-
-	fname = basename (path);
-	--fname;
-	*fname = '\0';
-	return path;
-}
-
 /**************************************************************************
 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
 **************************************************************************/