/********************************
 * Matthew Page
 * System Programming
 * 03/26/2015
 *
 * chmoddy.c - rewrite chmod
 *
 *******************************/

#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>

int main(int argc, char **argv)
{
    int i=0;
    int j;
    char c;
    int mode=0;

    if (argc != 3)
    {
        fprintf(stderr, "Error! Incorrect argument count!\n");
        exit (1);
    }

    //mode = atoi(argv[1]);
    while(*(*(argv+1)+i) != '\0')
    {
        c = *(*(argv+1)+i);
        if (c >= '4')
        {
            mode = mode | S_IRUSR >> i*3;          
            c=c-4;
        }
        if (c >= '2')
        {
            mode = mode | S_IWUSR >> i*3;   
            c=c-2;
        }
        if (c >= '1')
        {
            mode = mode | S_IXUSR >> i*3;    
        }
        i++;
    }
    chmod(argv[2], mode);
    return (0);

}