Rename a file

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Task
Rename a file
You are encouraged to solve this task according to the task description, using any language you may know.

In this task, the job is to rename the file called "input.txt" into "output.txt" and a directory called "docs" into "mydocs". This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.

Contents

[edit] Ada

with Ada.Directories;  use Ada.Directories;
...
Rename ("input.txt", "output.txt");
Rename ("docs", "mydocs");
Rename ("/input.txt", "/output.txt");
Rename ("/docs", "/mydocs");

The behavior depends on the concrete operating system regarding:

  • file name encoding issues;
  • file path notation (directory separator, directory syntax etc);
  • file extension syntax;
  • file system root (provided there is any).

[edit] ALGOL 68

Works with: ALGOL 68 version Standard - no extensions to language used

Note: reidf does not appear to be included in ALGOL 68G. Also note that file names would be Operating System dependent.

main:(
PROC rename = (STRING source name, dest name)INT:
BEGIN
FILE actual file;
INT errno = open(actual file, source name, stand back channel);
IF errno NE 0 THEN
errno
ELSE
IF reidf possible(actual file) THEN
reidf(actual file, dest name); # change the identification of the book #
errno
ELSE
close(actual file);
-1
FI
FI
END;
rename("input.txt", "output.txt");
rename("/input.txt", "/output.txt");
rename("docs", "mydocs");
rename("/docs", "/mydocs")
)

[edit] AWK

Awk allows to call operating system commands with the system() function. However, the awk script won't get its output, only the return code. But this task is simple enough for the trivial implementation to work:

$ awk 'BEGIN{system("mv input.txt output.txt")}'
$ awk 'BEGIN{system("mv docs mydocs")}'
$ awk 'BEGIN{system("mv /input.txt /output.txt")}'
$ awk 'BEGIN{system("mv docs mydocs")}'

[edit] AutoHotkey

FileMove, oldname, newname

[edit] AutoIt

FileMove("input.txt", "output.txt") FileMove("\input.txt", "\output.txt") DirMove("docs", "mydocs") DirMove("\docs", "\mydocs")

[edit] BASIC

NAME "input.txt" AS "output.txt"
NAME "\input.txt" AS "\output.txt"
NAME "docs" AS "mydocs"
NAME "\docs" AS "\mydocs"

[edit] Applesoft BASIC

Apple DOS 3.3 has a flat filesystem with no concept of directories. DOS commands such as RENAME are run directly from the Applesoft prompt but are not technically part of Applesoft BASIC. Thus, attempting to add this line to a program and run it results in a syntax error on that line.

RENAME INPUT.TXT,OUTPUT.TXT

To use a DOS command from a program, use the BASIC statement PRINT followed by CHR$(4) and the string containing the DOS command.

10  PRINT  CHR$ (4)"RENAME INPUT.TXT,OUTPUT.TXT"

Apple ProDOS does have directories. To change the current working directory to the "root" directory, issue a PREFIX / command.

10  PRINT  CHR$ (4)"RENAME INPUT.TXT,OUTPUT.TXT"
20 PRINT CHR$ (4)"RENAME DOCS,MYDOCS"
30 PRINT CHR$ (4)"PREFIX /"
40 PRINT CHR$ (4)"RENAME INPUT.TXT,OUTPUT.TXT"
50 PRINT CHR$ (4)"RENAME DOCS,MYDOCS"

[edit] ZX Spectrum Basic

The ZX Spectrum basic does not not have a facility to rename a file on the microdrive. To rename a file, it is necessary to delete the file and recreate it. Alternatively, a machine code program can be used to achieve this.

[edit] Batch File

ren input.txt output.txt
ren \input.txt output.txt
ren docs mydocs
ren \docs mydocs

[edit] BBC BASIC

When the file or directory names are known as constants at 'compile time':

      *RENAME input.txt output.txt
*RENAME \input.txt \output.txt
*RENAME docs. mydocs.
*RENAME \docs. \mydocs.

When the file or directory names are known only at run time:

      OSCLI "RENAME input.txt output.txt"
OSCLI "RENAME \input.txt \output.txt"
OSCLI "RENAME docs. mydocs."
OSCLI "RENAME \docs. \mydocs."

[edit] Bracmat

ren$("input.txt"."output.txt")         { 'ren' is based on standard C function 'rename()' }
ren$(docs.mydocs) { No quotes needed: names don't contain dots or colons. }
ren$("d:\\input.txt"."d:\\output.txt") { Backslash is escape character, so we need to escape it. }
ren$(@"d:\docs".@"d:\mydocs") { @ used as syntactic sugar as in C# for inhibiting escape. }
 

[edit] C

#include <stdio.h>
 
int main()
{
rename("input.txt", "output.txt");
rename("docs", "mydocs");
rename("/input.txt", "/output.txt");
rename("/docs", "/mydocs");
return 0;
}

[edit] C++

Translation of: C
#include <cstdio>
 
int main()
{
std::rename("input.txt", "output.txt");
std::rename("docs", "mydocs");
std::rename("/input.txt", "/output.txt");
std::rename("/docs", "/mydocs");
return 0;
}
Library: Boost

compiled with g++ -lboost_system -lboost_filesystem

#include "boost/filesystem.hpp"
 
int main()
{
boost::filesystem::rename(
boost::filesystem::path("input.txt"),
boost::filesystem::path("output.txt"));
boost::filesystem::rename(
boost::filesystem::path("docs"),
boost::filesystem::path("mydocs"));
boost::filesystem::rename(
boost::filesystem::path("/input.txt"),
boost::filesystem::path("/output.txt"));
boost::filesystem::rename(
boost::filesystem::path("/docs"),
boost::filesystem::path("/mydocs"));*/
return 0;
}

[edit] C#

using System;
using System.IO;
 
class Program {
static void Main(string[] args) {
File.Move("input.txt","output.txt");
File.Move(@"\input.txt",@"\output.txt");
 
Directory.Move("docs","mydocs");
Directory.Move(@"\docs",@"\mydocs");
}
}


[edit] Clipper

FRename( "input.txt","output.txt")
or
RENAME input.txt TO output.txt
 
FRename("\input.txt","\output.txt")
or
RENAME \input.txt TO \output.txt

Clipper has no it's own functions to rename a directory, it is possible, though, to write appropriate code in C and link it to Clipper application, using the Clipper's Extend system.

[edit] Clojure

(import '(java.io File))
 
(.renameTo (File. "input.txt") (File. "output.txt"))
(.renameTo (File. "docs") (File. "mydocs"))
 
(.renameTo
(File. (str (File/separator) "input.txt"))
(File. (str (File/separator) "output.txt")))
(.renameTo
(File. (str (File/separator) "docs"))
(File. (str (File/separator) "mydocs")))

[edit] Common Lisp

rename-file

(rename-file "input.txt" "output.txt")
(rename-file "docs" "mydocs")
(rename-file "/input.txt" "/output.txt")
(rename-file "/docs" "/mydocs")

[edit] D

std.file.rename("input.txt","output.txt");
std.file.rename("/input.txt","/output.txt");
std.file.rename("docs","mydocs");
std.file.rename("/docs","/mydocs");

[edit] DCL

rename input.txt output.txt
rename docs.dir mydocs.dir
rename [000000]input.txt [000000]output.txt
rename [000000]docs.dir [000000]mydocs.dir

[edit] Delphi

program RenameFile;
 
{$APPTYPE CONSOLE}
 
uses SysUtils;
 
begin
SysUtils.RenameFile('input.txt', 'output.txt');
SysUtils.RenameFile('\input.txt', '\output.txt');
 
// RenameFile works for both files and folders
SysUtils.RenameFile('docs', 'MyDocs');
SysUtils.RenameFile('\docs', '\MyDocs');
end.

[edit] E

for where in [<file:.>, <file:///>] {
where["input.txt"].renameTo(where["output.txt"], null)
where["docs"].renameTo(where["mydocs"], null)
}

[edit] Emacs Lisp

(rename-file "input.txt" "output.txt")
(rename-file "/input.txt" "/output.txt")
(rename-file "docs" "mydocs")
(rename-file "/docs" "/mydocs")

This can also be done interactively with M-x rename-file. Programmatically the default is to throw an error if the new name already exists but the "ok-if-already-exists" parameter can either forcibly overwrite or query the user. Query is the default interactively.

[edit] Erlang

 
file:rename("input.txt","output.txt"),
file:rename( "docs", "mydocs" ),
file:rename( "/input.txt", "/output.txt" ),
file:rename( "/docs", "/mydocs" ).
 

[edit] F#

Translation of: C#
open System.IO
 
[<EntryPoint>]
let main args =
File.Move("input.txt","output.txt")
File.Move(@"\input.txt",@"\output.txt")
Directory.Move("docs","mydocs")
Directory.Move(@"\docs",@"\mydocs")
0

[edit] Factor

"" "/" [ 
[ "input.txt" "output.txt" move-file "docs" "mydocs" move-file ] with-directory
] bi@

[edit] Fantom

 
class Rename
{
public static Void main ()
{
// rename file/dir in current directory
File.rename("input.txt".toUri).rename("output.txt")
File.rename("docs/".toUri).rename("mydocs/")
// rename file/dir in root directory
File.rename("/input.txt".toUri).rename("/output.txt")
File.rename("/docs/".toUri).rename("/mydocs/")
}
}
 

[edit] Forth

 s" input.txt"  s" output.txt" rename-file throw
s" /input.txt" s" /output.txt" rename-file throw

[edit] Fortran

Using UNIX extensions to Fortran 77 (see e.g. g77 manual) :

      PROGRAM EX_RENAME
CALL RENAME('input.txt','output.txt')
CALL RENAME('docs','mydocs')
CALL RENAME('/input.txt','/output.txt')
CALL RENAME('/docs','/mydocs')
END

[edit] Go

package main
import "os"
 
func main() {
os.Rename("input.txt", "output.txt")
os.Rename("docs", "mydocs")
os.Rename("/input.txt", "/output.txt")
os.Rename("/docs", "/mydocs")
}

[edit] Groovy

Using File

['input.txt':'output.txt', 'docs':'mydocs'].each { src, dst ->
['.', ''].each { dir ->
new File("$dir/$src").renameTo(new File("$dir/$dst"))
}
}

Using Ant

['input.txt':'output.txt', 'docs':'mydocs'].each { src, dst ->
['.', ''].each { dir ->
new AntBuilder().move(file:"$dir/$src", toFile:"$dir/$dst")
}
}


[edit] Harbour

FRename( "input.txt","output.txt")
or
RENAME input.txt TO output.txt
 
FRename("\input.txt","\output.txt")
or
RENAME \input.txt TO \output.txt

Harbour has no it's own functions to rename a directory, it is possible, though, to write appropriate code in C and link it to Harbour application, using the Harbour's Extend system.

[edit] Haskell

import System.IO
import System.Directory
 
main = do
renameFile "input.txt" "output.txt"
renameDirectory "docs" "mydocs"
renameFile "/input.txt" "/output.txt"
renameDirectory "/docs" "/mydocs"

[edit] HicEst

WRITE(FIle='input.txt', REName='.\output.txt')
SYSTEM(DIR='E:\HicEst\Rosetta')
WRITE(FIle='.\docs', REName='.\mydocs')
 
WRITE(FIle='\input.txt', REName='\output.txt')
SYSTEM(DIR='\')
WRITE(FIle='\docs', REName='\mydocs')

[edit] Icon and Unicon

Icon supports 'rename' for files only.

every dir := !["./","/"] do {
rename(f := dir || "input.txt", dir || "output.txt") |stop("failure for file rename ",f)
rename(f := dir || "docs", dir || "mydocs") |stop("failure for directory rename ",f)
}

Note: Icon and Unicon accept both / and \ for directory separators.

[edit] Io

 
// rename file in current directory
f := File with("input.txt")
f moveTo("output.txt")
 
// rename file in root directory
f := File with("/input.txt")
f moveTo("/output.txt")
 
// rename directory in current directory
d := Directory with("docs")
d moveTo("mydocs")
 
// rename directory in root directory
d := Directory with("/docs")
d moveTo("/mydocs")
 

[edit] J

J does not ship with a built-in utility for renaming files. The following will work on Windows, Linux and Macs:

frename=: 4 : 0
if. x -: y do. return. end.
if. IFUNIX do.
hostcmd=. [: 2!:0 '('"_ , ] , ' || true)'"_
hostcmd 'mv "',y,'" "',x,'"'
else.
'kernel32 MoveFileA i *c *c' 15!:0 y;x
end.
)

Useage:

'output.txt' frename 'input.txt'
'/output.txt' frename '/input.txt'
'mydocs' frename 'docs'
'/mydocs' frename '/docs'

[edit] Java

import java.io.File;
public class FileRenameTest {
public static boolean renameFile(String oldname, String newname) {
// File (or directory) with old name
File file = new File(oldname);
 
// File (or directory) with new name
File file2 = new File(newname);
 
// Rename file (or directory)
boolean success = file.renameTo(file2);
return success;
}
public static void test(String type, String oldname, String newname) {
System.out.println("The following " + type + " called " + oldname +
( renameFile(oldname, newname) ? " was renamed as " : " could not be renamed into ")
+ newname + "."
);
}
public static void main(String args[]) {
test("file", "input.txt", "output.txt");
test("file", File.separator + "input.txt", File.separator + "output.txt");
test("directory", "docs", "mydocs");
test("directory", File.separator + "docs" + File.separator, File.separator + "mydocs" + File.separator);
}
}

[edit] JavaScript

Works with: JScript

Throws an error if the destination file/folder exists.

var fso = new ActiveXObject("Scripting.FileSystemObject");
fso.MoveFile('input.txt', 'output.txt');
fso.MoveFile('c:/input.txt', 'c:/output.txt');
fso.MoveFolder('docs', 'mydocs');
fso.MoveFolder('c:/docs', 'c:/mydocs');

[edit] Joy

 
"input.txt" "output.txt" frename
"/input.txt" "/output.txt" frename
"docs" "mydocs" frename
"/docs" "/mydocs" frename.
 

[edit] Julia

 
mv("input.txt", "output.txt")
mv("docs", "mydocs")
mv("/input.txt", "/output.txt")
mv("/docs", "/mydocs")

[edit] Lasso

// move file
local(f = file('input.txt'))
#f->moveTo('output.txt')
#f->close
 
// move directory, just like a file
local(d = dir('docs'))
#d->moveTo('mydocs')
 
// move file in root file system (requires permissions at user OS level)
local(f = file('//input.txt'))
#f->moveTo('//output.txt')
#f->close
 
// move directory in root file system (requires permissions at user OS level)
local(d = file('//docs'))
#d->moveTo('//mydocs')

[edit] Liberty BASIC

'   LB has inbuilt 'name' command, but can also run batch files
 
nomainwin
 
name "input.txt" as "output.txt"
run "cmd.exe /c ren docs mydocs", HIDE
name "C:\input.txt" as "C:\output.txt"
run "cmd.exe /c ren C:\docs mydocs", HIDE
 
end

[edit] Locomotive Basic

|ren,"input.txt","output.txt"

(AMSDOS RSX command, therefore prefixed with a vertical bar. Also, there are no subdirectories in AMSDOS, so there is no way to do the other tests.)

[edit] Lua

os.rename( "input.txt", "output.txt" )
os.rename( "/input.txt", "/output.txt" )
os.rename( "docs", "mydocs" )
os.rename( "/docs", "/mydocs" )

[edit] Maple

use FileTools in
Rename( "input.txt", "output.txt" );
Rename( "docs", "mydocs" );
Rename( "/input.txt", "/output.txt" ); # assuming permissions in /
Rename( "/docs", "/mydocs" ) # assuming permissions in /
end use:

[edit] Mathematica

SetDirectory[NotebookDirectory[]]
RenameFile["input.txt", "output.txt"]
RenameDirectory["docs", "mydocs"]
SetDirectory[$RootDirectory]
RenameFile["input.txt", "output.txt"]
RenameDirectory["docs", "mydocs"]


[edit] MATLAB / Octave

 [STATUS, MSG, MSGID] = movefile (F1, F2);  

[edit] MAXScript

MAXScript has no folder rename method

-- Here
renameFile "input.txt" "output.txt"
-- Root
renameFile "/input.txt" "/output.txt"

[edit] Mercury

:- module rename_file.
:- interface.
 
:- import_module io.
:- pred main(io::di, io::uo) is det.
 
:- implementation.
 
:- import_module dir.
 
main(!IO) :-
rename_file("input.txt", "output.txt", !IO),
rename_file("docs", "mydocs", !IO),
rename_file("/input.txt", "/output.txt", !IO),
rename_file("/docs", "/mydocs", !IO).
 
:- pred rename_file(string::in, string::in, io::di, io::uo) is det.
 
rename_file(OldName, NewName, !IO) :-
io.rename_file(OldName, NewName, Result, !IO),
(
Result = ok
 ;
Result = error(Error),
print_io_error(Error, !IO)
).
 
:- pred print_io_error(io.error::in, io::di, io::uo) is det.
 
print_io_error(Error, !IO) :-
io.stderr_stream(Stderr, !IO),
io.write_string(Stderr, io.error_message(Error), !IO),
io.nl(Stderr, !IO),
io.set_exit_status(1, !IO).

[edit] MUMPS

ANSI MUMPS doesn't allow access to the operating system except possibly through the View command and $View function, both of which are implementation specific. Intersystems' Caché does allow you to create processes with the $ZF function, and if the permissions for the Caché process allow it you can perform operating system commands.

In Cache on OpenVMS in an FILES-11 filesystem ODS-5 mode these could work:

 ;Local
S X=$ZF(-1,"rename input.txt output.txt")
S X=$ZF(-1,"rename docs.dir mydocs.dir")
 ;Root of current device
S X=$ZF(-1,"rename [000000]input.txt [000000]output.txt")
S X=$ZF(-1,"rename [000000]docs.dir [000000]mydocs.dir")

[edit] NetRexx

/* NetRexx */
options replace format comments java crossref symbols binary
 
runSample(arg)
return
 
-- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
method isFileRenamed(oldFile, newFile) public static returns boolean
fo = File(oldFile)
fn = File(newFile)
fRenamed = fo.renameTo(fn)
return fRenamed
 
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
method runSample(arg) private static
parse arg files
if files = '' then files = 'input.txt output.txt F docs mydocs D /input.txt /output.txt F /docs /mydocs D'
loop while files.length > 0
parse files of nf ft files
select case(ft.upper())
when 'F' then do
ft = 'File'
end
when 'D' then do
ft = 'Directory'
end
otherwise do
ft = 'File'
end
end
if isFileRenamed(of, nf) then dl = 'renamed'
else dl = 'not renamed'
say ft ''''of'''' dl 'to' nf
end
 
return
 

[edit] NewLISP

(rename-file "./input.txt" "./output.txt")
(rename-file "./docs" "./mydocs")
(rename-file "/input.txt" "/output.txt")
(rename-file "/docs" "/mydocs")

[edit] Objeck

 
use IO;
bundle Default {
class FileExample {
function : Main(args : String[]) ~ Nil {
File->Rename("input.txt", "output.txt");
File->Rename("docs", "mydocs");
File->Rename("/input.txt", "/output.txt");
File->Rename("/docs", "/mydocs");
}
}
}
 

[edit] Objective-C

Works with: Cocoa
Works with: GNUstep
NSFileManager *fm = [NSFileManager defaultManager];
 
// Pre-OS X 10.5
[fm movePath:@"input.txt" toPath:@"output.txt" handler:nil];
[fm movePath:@"docs" toPath:@"mydocs" handler:nil];
 
// OS X 10.5+
[fm moveItemAtPath:@"input.txt" toPath:@"output.txt" error:NULL];
[fm moveItemAtPath:@"docs" toPath:@"mydocs" error:NULL];

[edit] OCaml

Sys.rename "input.txt" "output.txt";;
Sys.rename "docs" "mydocs";;
Sys.rename "/input.txt" "/output.txt";;
Sys.rename "/docs" "/mydocs";;

[edit] Octave

 rename('docs','mydocs');
rename('input.txt','/output.txt');
rename('/docs','/mydocs');
 

[edit] Openedge/Progress

OS-RENAME "input.txt" "output.txt".
OS-RENAME "docs" "mydocs".
 
OS-RENAME "/input.txt" "/output.txt".
OS-RENAME "/docs" "/mydocs".

[edit] PARI/GP

GP has no built-in facilities for renaming, but can use a system call:

system("mv input.txt output.txt");
system("mv /input.txt /output.txt");
system("mv docs mydocs");
system("mv /docs /mydocs");

PARI, as usual, has access to all the standard C methods.

[edit] Pascal

  var  
f : file ; // Untyped file
begin
 
// as current directory
AssignFile(f,'input.doc');
Rename(f,'output.doc');
 
// as root directory
AssignFile(f,'\input.doc');
Rename(f,'\output.doc');
 
// rename a directory
AssignFile(f,'docs');
Rename(f,'mydocs');
 
//rename a directory off the root
 
AssignFile(f,'\docs');
Rename(f,'\mydocs');
 
end;

[edit] Perl

use File::Copy qw(move);
use File::Spec::Functions qw(catfile rootdir);
# here
move 'input.txt', 'output.txt';
move 'docs', 'mydocs';
# root dir
move (catfile rootdir, 'input.txt'), (catfile rootdir, 'output.txt');
move (catfile rootdir, 'docs'), (catfile rootdir, 'mydocs');

The core rename($oldfile,$newfile) can rename a file within a directory, but has the usual limitations of the rename() system call or C library function, which means generally not working across filesystems, and perhaps not working to rename directories. move() does a copy and delete when necessary.

[edit] Perl 6

rename 'input.txt', 'output.txt';
rename 'docs', 'mydocs';
rename '/input.txt', '/output.txt';
rename '/docs', '/mydocs';

[edit] PHP

<?php
rename('input.txt', 'output.txt');
rename('docs', 'mydocs');
rename('/input.txt', '/output.txt');
rename('/docs', '/mydocs');
?>

[edit] PicoLisp

(call 'mv "input.txt" "output.txt")
(call 'mv "docs" "mydocs")
(call 'mv "/input.txt" "/output.txt")
(call 'mv "/docs" "/mydocs")

[edit] Pike

int main(){
mv("input.txt", "output.txt");
mv("/input.txt", "/output.txt");
mv("docs", "mydocs");
mv("/docs", "/mydocs");
}

[edit] Pop11

sys_file_move('inputs.txt', 'output.txt');
sys_file_move('docs', 'mydocs');
sys_file_move('/inputs.txt', '/output.txt');
sys_file_move(/'docs', '/mydocs');

Note that notion of the root of filesystem is Unix specific, so above we do not try to suport other systems.

[edit] PowerShell

Rename-Item input.txt output.txt
 
# The Rename-item has the alias ren
ren input.txt output.txt

[edit] ProDOS

rename input.txt to output.txt
rename docs to mydocs

[edit] PureBasic

RenameFile("input.txt", "output.txt")
RenameFile("docs\", "mydocs\")
 
RenameFile("/input.txt","/output.txt")
RenameFile("/docs\","/mydocs\")

[edit] Python

import os
 
os.rename("input.txt", "output.txt")
os.rename("docs", "mydocs")
 
os.rename(os.sep + "input.txt", os.sep + "output.txt")
os.rename(os.sep + "docs", os.sep + "mydocs")

Or the alternative:

import shutil
 
shutil.move("input.txt", "output.txt")
shutil.move("docs", "mydocs")
 
shutil.move("/input.txt", "/output.txt")
shutil.move("/docs", "/mydocs")

[edit] R

file.rename("input.txt", "output.txt")
file.rename("/input.txt", "/output.txt")
file.rename("docs", "mydocs")
file.rename("/docs", "/mydocs")

[edit] Racket

 
#lang racket
 
(rename-file-or-directory "input.txt" "output.txt")
(rename-file-or-directory "docs" "mydocs")
 
;; find the filesystem roots, and pick the first one
(define root (first (filesystem-root-list)))
 
(rename-file-or-directory (build-path root "input.txt")
(build-path root "output.txt"))
(rename-file-or-directory (build-path root "docs")
(build-path root "mydocs"))
 

[edit] Raven

`mv /path/to/file/oldfile /path/to/file/newfile` shell

[edit] REALbasic

This should work regardless of what OS it's running under (but untested under Mac OS).

Sub Renamer()
Dim f As FolderItem, r As FolderItem
 
f = GetFolderItem("input.txt")
'Changing a FolderItem's Name attribute renames the file or directory.
If f.Exists Then f.Name = "output.txt"
'Files and directories are handled almost identically in RB.
f = GetFolderItem("docs")
If f.Exists Then f.Name = "mydocs"
 
'Jump through hoops to find the root directory.
r = RootDir(GetFolderItem("."))
 
f = r.Child("input.txt")
'Renaming in a different directory identical to renaming in current directory.
If f.Exists Then f.Name = "output.txt"
f = r.Child("docs")
If f.Exists Then f.Name = "mydocs"
End Sub
 
Function RootDir(what As FolderItem) As FolderItem
'RB doesn't have an easy way to find the root of the current drive;
'not an issue under *nix but troublesome under Windows.
If what.Parent <> Nil Then 'Nil = no parent = root.
Return RootDir(what.Parent) 'Recursive.
Else
Return what
End If
End Function

[edit] REBOL

rename %input.txt %output.txt
rename %docs/ %mydocs/
 
; Unix. Note that there's no path specification used for the
; new name. "Rename" is not "move".
 
rename %/input.txt %output.txt
rename %/docs/ %mydocs/
 
; DOS/Windows:
 
rename %/c/input.txt %output.txt
rename %/c/docs/ %mydocs/
 
; Because REBOL treats data access schemes as uniformly as possible,
; you can do tricks like this:
 
rename ftp://username:password@ftp.site.com/www/input.txt %output.txt
rename ftp://username:password@ftp.site.com/www/docs/ %mydocs/
 

[edit] REXX

[edit] version 1

  do 2
'RENAME' "input.txt" "output.txt"
'CD' "\"
'MOVE' "\docs" "\mydocs"
end

[edit] version 2

  do 2
'RENAME' "input.txt output.txt"
'CD' "\"
'MOVE' "\docs \mydocs"
end

[edit] Ruby

File.rename('input.txt', 'output.txt')
File.rename('/input.txt', '/output.txt')
File.rename('docs', 'mydocs')
File.rename('/docs', '/mydocs')

With 'fileutils' from the standard library: The FileUtils#move method has some more flexibility than the core File#rename method (not really demonstrated here).

require 'fileutils'
moves = { "input.txt" => "output.txt", "/input.txt" => "/output.txt", "docs" => "mydocs","/docs" => "/mydocs"}
moves.each{ |src, dest| FileUtils.move( src, dest, :verbose => true ) }

[edit] Run BASIC

RB has no direct command. You Shell out to windows or unix.

a$ = shell$("RENAME input.txt output.txt")
a$ = shell$("RENAME docs mydocs")
a$ = shell$("RENAME \input.txt \output.txt")
a$ = shell$("RENAME \docs \mydocs")

[edit] Scala

Library: Scala

[edit] Straight forward

import scala.language.implicitConversions
import java.io.File
 
object Rename0 {
def main(args: Array[String]) { // The implicit causes every String to File mapping,
implicit def file(s: String) = new File(s) // will be converted to new File(String)
"myfile.txt" renameTo "anotherfile.txt"
"/tmp/myfile.txt" renameTo "/tmp/anotherfile.txt"
"mydir" renameTo "anotherdir"
"/tmp/mydir" renameTo "/tmp/anotherdir"
}
}

[edit] Alternative

// What about this, could also equipped with an implicit.
object Rename1 {
def main(args: Array[String]) {
for { fsObject <- List(("myfile.txt", "anotherfile.txt"),("/tmp/myfile.txt", "/tmp/anotherfile.txt"),
("mydir", "anotherdir"),("/tmp/mydir", "/tmp/anotherdir"))
} new File(fsObject._1) renameTo new File(fsObject._2)
}
}

[edit] Scheme

Works with: Chicken Scheme
Works with: Guile
(rename-file "input.txt" "output.txt")
(rename-file "docs" "mydocs")
(rename-file "/input.txt" "/output.txt")
(rename-file "/docs" "/mydocs")

[edit] Seed7

The library osfiles.s7i defines the function moveFile, which renames / moves a file. Seed7 uses a standard path representation to make paths operating system independent. In the standard path representation a / is used as path delimiter and drive letters like C: must be written as /c instead. Creating files and directories in a file system root may need privileges, so the program may fail, when it is started by a normal user.

$ include "seed7_05.s7i";
include "osfiles.s7i";
 
const proc: main is func
begin
moveFile("input.txt", "output.txt");
moveFile("docs", "mydocs");
moveFile("/input.txt", "/output.txt");
moveFile("/docs", "/mydocs");
end func;

Under Windows each filesystem has its own root. Therefore you need to replace "/input.txt", "/output.txt", "/docs" and "/mydocs" with "/c/input.txt", "/c/output.txt", "/c/docs" and "/c/mydocs".

[edit] Slate

(File newNamed: 'input.txt') renameTo: 'output.txt'.
(File newNamed: '/input.txt') renameTo: '/output.txt'.
(Directory newNamed: 'docs') renameTo: 'mydocs'.
(Directory newNamed: '/docs') renameTo: '/mydocs'.

[edit] Smalltalk

Works with: GNU Smalltalk
File rename: 'input.txt' to: 'output.txt'.
File rename: 'docs' to: 'mydocs'.
"as for other example, this works on systems
where the root is / ..."

File rename: '/input.txt' to: '/output.txt'.
File rename: '/docs' to: '/mydocs'
Works with: Smalltalk/X
'input.txt' asFilename renameTo: 'output.txt'.
'docs' asFilename renameTo: 'mydocs'.
'/input.txt' asFilename renameTo: '/output.txt'.
'/docs' asFilename renameTo: '/mydocs'

[edit] Standard ML

OS.FileSys.rename {old = "input.txt", new = "output.txt"};
OS.FileSys.rename {old = "docs", new = "mydocs"};
OS.FileSys.rename {old = "/input.txt", new = "/output.txt"};
OS.FileSys.rename {old = "/docs", new = "/mydocs"};

[edit] Tcl

Assuming that the Bash example shows what is actually meant with this task (one file and one directory here, one file and one directory in the root) and further assuming that this is supposed to be generic (i.e. OS agnostic):

file rename inputs.txt output.txt
file rename docs mydocs
 
file rename [file nativename /inputs.txt] [file nativename /output.txt]
file rename [file nativename /docs] [file nativename /mydocs]

Without the need to work on unusual platforms like Mac OS 9, the code could be just:

file rename inputs.txt output.txt
file rename docs mydocs
 
file rename /inputs.txt /output.txt
file rename /docs /mydocs

[edit] Toka

needs shell
" input.txt" " output.txt" rename
" /input.txt" " /output.txt" rename
 
" docs" " mydocs" rename
" /docs" " /mydocs" rename

[edit] TorqueScript

fileCopy("Input.txt", "Output.txt");
fileDelete("Input.txt");
 
for(%File = FindFirstFile("Path/*.*"); %File !$= ""; %File = FindNextFile("Path/*.*"))
{
fileCopy(%File, "OtherPath/" @ %File);
fileDelete(%File);
}

[edit] TUSCRIPT

 
$$ MODE TUSCRIPT
- rename file
ERROR/STOP RENAME ("input.txt","output.txt")
- rename directory
ERROR/STOP RENAME ("docs","mydocs",-std-)
 

[edit] TXR

TXR works with native paths.

@(do (rename-path "input.txt" "output.txt")
 ;; Windows (MinGW based port)
(rename-path "C:\\input.txt" "C:\\output.txt")
 ;; Unix; Windows (Cygwin port)
(rename-path "/input.txt" "/output.txt"))

Directories are renamed the same way; input.txt could be a directory.

[edit] UNIX Shell

mv input.txt output.txt
mv /input.txt /output.txt
mv docs mydocs
mv /docs /mydocs

[edit] Vedit macro language

Vedit allows using either '\' or '/' as directory separator character, it is automatically converted to the one used by the operating system.

// In current directory
File_Rename("input.txt", "output.txt")
File_Rename("docs", "mydocs")
 
// In the root directory
File_Rename("/input.txt", "/output.txt")
File_Rename("/docs", "/mydocs")

[edit] Visual Basic .NET

Platform: .NET

Works with: Visual Basic .NET version 9.0+
'Current Directory
IO.Directory.Move("docs", "mydocs")
IO.File.Move("input.txt", "output.txt")
 
'Root
IO.Directory.Move("\docs", "\mydocs")
IO.File.Move("\input.txt", "\output.txt")
 
'Root, platform independent
IO.Directory.Move(IO.Path.DirectorySeparatorChar & "docs", _
IO.Path.DirectorySeparatorChar & "mydocs")
IO.File.Move(IO.Path.DirectorySeparatorChar & "input.txt", _
IO.Path.DirectorySeparatorChar & "output.txt")

[edit] Yorick

Translation of: UNIX Shell
rename, "input.txt", "output.txt";
rename, "/input.txt", "/output.txt";
rename, "docs", "mydocs";
rename, "/docs", "/mydocs";
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