rename, _wrename

Article
07/22/2011

Rename a file or directory.

int rename(
   const char *oldname,
   const char *newname 
);
int _wrename(
   const wchar_t *oldname,
   const wchar_t *newname 
);

Parameters

oldname
Pointer to old name.
newname
Pointer to new name.

Return Value

Each of these functions returns 0 if it is successful. On an error, the function returns a nonzero value and sets errno to one of the following values:

EACCES
File or directory specified by newname already exists or could not be created (invalid path); or oldname is a directory and newname specifies a different path.
ENOENT
File or path specified by oldname not found.
EINVAL
Name contains invalid characters.

For other possible return values, see _doserrno, _errno, syserrlist, and _sys_nerr.

Remarks

The rename function renames the file or directory specified by oldname to the name given by newname. The old name must be the path of an existing file or directory. The new name must not be the name of an existing file or directory. You can use rename to move a file from one directory or device to another by giving a different path in the newname argument. However, you cannot use rename to move a directory. Directories can be renamed, but not moved.

_wrename is a wide-character version of _rename; the arguments to _wrename are wide-character strings. _wrename and _rename behave identically otherwise.

Generic-Text Routine Mappings

TCHAR.H routine	_UNICODE & _MBCS not defined	_MBCS defined	_UNICODE defined
_trename	rename	rename	_wrename

Requirements

Routine	Required header
rename	<io.h> or <stdio.h>
_wrename	<stdio.h> or <wchar.h>

For additional compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

Example

// crt_renamer.c
/* This program attempts to rename a file named
 * CRT_RENAMER.OBJ to CRT_RENAMER.JBO. For this operation
 * to succeed, a file named CRT_RENAMER.OBJ must exist and
 * a file named CRT_RENAMER.JBO must not exist.
 */

#include <stdio.h>

int main( void )
{
   int  result;
   char old[] = "CRT_RENAMER.OBJ", new[] = "CRT_RENAMER.JBO";

   /* Attempt to rename file: */
   result = rename( old, new );
   if( result != 0 )
      printf( "Could not rename '%s'\n", old );
   else
      printf( "File '%s' renamed to '%s'\n", old, new );
}

Output

File 'CRT_RENAMER.OBJ' renamed to 'CRT_RENAMER.JBO'

.NET Framework Equivalent

System::IO::File::Move

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