//
// Execute the given command every N seconds.
//

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <time.h>

void Execute(char *Command, ...);

main (int argc, char *argv[])
{
    int Seconds;
    char *Command;

    Seconds = 60;
    if (argc > 1) {
        Seconds = atoi(argv[1]);
    }

    if (argc > 2) {
        Command = argv[2];
    }

    if (argc != 3) {
        fprintf(stderr, "Usage: every [seconds] [command...]\n");
        fprintf(stderr, "- use quotes around command and arguments if necessary\n");
        exit(1);
    }

    while (1) {
        time_t t;
        time (&t);
        printf("%.24s: ", ctime(&t));
        Execute(Command);
        _sleep(Seconds * 1000);
    }
}

void Execute (char *Command, ...)
{
    char Buffer[100];
    va_list vap;

    va_start(vap, Command);
    vsprintf(Buffer, Command, vap);
    va_end(vap);

    printf("*** %s\n", Buffer);
    system(Buffer);

    return;
}