Сохранение даты/времени ИЗМЕНЕНИЯ файла

/* UTIME.C: This program uses _utime to set the
 * file-modification time to the current time.
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/utime.h>

void main( void )
{
   /* Show file time before and after. */
   system( "dir utime.c" );
   if( _utime( "utime.c", NULL ) == -1 )
      perror( "_utime failed\n" );
   else
      printf( "File time modified\n" );
   system( "dir utime.c" );
}