Listing 2: setutctime.c

/* setutctime.c 
Sets the system clock from a specified UTC calendar time, using the 
stime() function. */
     
#include <stdio.h>
#include <time.h>
     
void main (int argc, char *argv[] )
{
  time_t user_supplied_time;
     
  if ( argc != 2 )
    {
      fprintf( stderr, "Usage: setutctime calendar_time.\n" ); 
      exit(1);
    }
  sscanf( argv[1], "%ld", &user_supplied_time ); 
  if( stime( &user_supplied_time ) != 0 )
    {
      fprintf( stderr, "Unable to set time.\n"); 
      exit(1);
    }
  exit(0);
}
     
/* End of File */