chmod.c

#include "types.h"
#include "stat.h"
#include "user.h"

int
main(int argc, char *argv[])
{
  char permissions[4];
  int i;
  if(argc != 3){
    printf(2, "Usage: chmod permission file\n");
    exit();
  }

for(i=0; i <3; i++)
	permissions[i] = argv[1][i] - '0';
permissions[3] = 0;
if(chmod(permissions, argv[2]) < 0)
printf(2, "chmod %s %s: failed\n", argv[1], argv[2]);
exit();
}