_unlink, _wunlink

Articolo
07/24/2011

Delete a file.

int _unlink(
   const char *filename 
);
int _wunlink(
   const wchar_t *filename 
);

Parameters

filename
Name of file to remove.

Return Value

Each of these functions returns 0 if successful. Otherwise, the function returns –1 and sets errno to EACCES, which means the path specifies a read-only file, or to ENOENT, which means the file or path is not found or the path specified a directory.

See _doserrno, errno, _sys_errlist, and _sys_nerr for more information on these, and other, return codes.

Remarks

The _unlink function deletes the file specified by filename. _wunlink is a wide-character version of _unlink; the filename argument to _wunlink is a wide-character string. These functions behave identically otherwise.

Generic-Text Routine Mappings

TCHAR.H routine	_UNICODE & _MBCS not defined	_MBCS defined	_UNICODE defined
_tunlink	_unlink	_unlink	_wunlink

Requirements

Routine	Required header
_unlink	<io.h> and <stdio.h>
_wunlink	<io.h> or <wchar.h>

For additional compatibility information, see Compatibility in the Introduction.

Code Example

This program uses _unlink to delete CRT_UNLINK.TXT.

// crt_unlink.c

#include <stdio.h>

int main( void )
{
   if( _unlink( "crt_unlink.txt" ) == -1 )
      perror( "Could not delete 'CRT_UNLINK.TXT'" );
   else
      printf( "Deleted 'CRT_UNLINK.TXT'\n" );
}

Input: crt_unlink.txt

This file will be deleted.

Sample Output

Deleted 'CRT_UNLINK.TXT'

.NET Framework Equivalent

System::IO::File::Delete

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