/* xsh_sleep.c - xsh_sleep */

#include 
#include 
#include 

/*------------------------------------------------------------------------
 * xsh_sleep  -  Shell command to delay for a specified number of seconds
 *------------------------------------------------------------------------
 */
shellcmd xsh_sleep(int nargs, char *args[])
{
        int32   delay;                  /* Delay in seconds             */
        char    *chptr;                 /* Walks through argument       */
        char    ch;                     /* Next character of argument   */

        /* For argument '--help', emit help about the 'sleep' command   */

        if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
                printf("Use: %s\n\n", args[0]);
                printf("Description:\n");
                printf("\tDelay for a specified number of seconds\n");
                printf("Options:\n");
                printf("\t--help\t display this help and exit\n");
                return 0;
        }

        /* Check for valid number of arguments */

        if (nargs > 2) {
                fprintf(stderr, "%s: too many arguments\n", args[0]);
                fprintf(stderr, "Try '%s --help' for more information\n",
                                args[0]);
                return 1;
        }

        if (nargs != 2) {
                fprintf(stderr, "%s: argument in error\n", args[0]);
                fprintf(stderr, "Try '%s --help' for more information\n",
                                args[0]);
                return 1;
        }

        chptr = args[1];
        ch = *chptr++;
        delay = 0;
        while (ch != NULLCH) {
                if ( (ch < '0') || (ch > '9') ) {
                        fprintf(stderr, "%s: nondigit in argument\n",
                                args[0]);
                        return 1;
                }
                delay = 10*delay + (ch - '0');
                ch = *chptr++;
        }
        sleep(delay);
        return 0;
}