argtest.c

/*
 * Program to test argument passing: it displays the argc and all
 * of argv, and then exits.
 *
 * Intended for the basic system calls assignment. This may help
 * debugging the argument handling of execv().
 */

#include <stdio.h>

int
main(int argc, char *argv[])
{
        const char *tmp;
        int i;

        printf("argc   : %d\n", argc);
        printf("&tmp   : %p\n", &tmp);
        printf("&i     : %p\n", &i);
        printf("&argc  : %p\n", &argc);
        printf("&argv  : %p\n", &argv);
        printf("argv   : %p\n", argv);
        printf("\n");

        for (i=0; i<=argc; i++) {
                printf("&argv[%d] : %p\n", i, &argv[i]);
        }
        printf("\n");

        for (i=0; i<=argc; i++) {
                printf("argv[%d] : %p\n", i, argv[i]);
        }
        printf("\n");

        for (i=0; i<=argc; i++) {
                tmp = argv[i];
                if (tmp == NULL) {
                        tmp = "[NULL]";
                }
                printf("argv[%d] -> %s\n", i, tmp);
        }

        return 0;
}