#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

main(int argc, char** argv, char** env) {

char* legals[] = {
  "list_members",
  "find_member",
  "invite_members",
  (char*) NULL
};

int i;
int flag = 0;
char command[100];

    if (argc < 2) {
        dprintf(STDERR_FILENO,
                "Usage: %s command command_args\nNo command found\n",
                argv[0]);
        exit(1);
    }

    for ( i = 0; legals[i] != (char*) NULL; i++ ) {
        if (strcmp(legals[i], argv[1]) == 0) {
            flag = 1;
            break;
        }
    }
    if (!flag){
        dprintf(STDERR_FILENO,
                "Usage: %s command command_args\nUnknown command: %s\n",
                argv[0], argv[1]);
        exit(1);
    }
    sprintf(command, "/usr/local/mailman/bin/%s", argv[1]);
    execve(command, &argv[1], env);
    dprintf(STDERR_FILENO, "execve of %s failed\n", command);
    exit(2);
}