Add mv(1) utility.

utils/.gitignore

@@ -27,3 +27,4 @@ mkdir
 rmdir
 which
 ln
+mv

utils/Makefile

@@ -32,6 +32,7 @@ ln \
 ls \
 memstat \
 mkdir \
+mv \
 mxsh \
 pager \
 pwd \

utils/mv.cpp

@@ -0,0 +1,37 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+
+    mv.cpp
+    Rename files and directories.
+
+*******************************************************************************/
+
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+
+int main(int argc, char* argv[])
+{
+	if ( argc != 3 )
+	{
+		printf("Usage: %s <from> <to>\n", argv[0]);
+		return 0;
+	}
+	if ( rename(argv[1], argv[2]) != 0 )
+		error(1, errno, "rename `%s' to `%s'", argv[1], argv[2]);
+	return 0;
+}