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/* date.c bradkemp@indusriver.com */

#include <time.h>

#include <stdio.h>

static const char invalid_date[] = "Invalid date %s\n";

int do_date(int argc, char * argv[])

{

    time_t tm;

    struct tm tm_time;

    time(&tm);

    memcpy(&tm_time, localtime(&tm), sizeof(tm_time));

    if (argc > 1) {

        int nr;

        nr = sscanf(argv[1], "%2d%2d%2d%2d%d",

                    &(tm_time.tm_mon),

                    &(tm_time.tm_mday),

                    &(tm_time.tm_hour),

                    &(tm_time.tm_min), &(tm_time.tm_year));

        if (nr < 4 || nr > 5) {

            fprintf(stderr, invalid_date, argv[1]);

            return(0);

        }

        /* correct for century  - minor Y2K problem here? */

        if (tm_time.tm_year >= 1900)

            tm_time.tm_year -= 1900;

        /* adjust date */

        tm_time.tm_mon -= 1;

        if((tm = mktime(&tm_time)) < 0) {

            fprintf(stderr, invalid_date, argv[1]);

            return(0);

        }

        if(stime(&tm) < 0) {

            fprintf(stderr, "Unable to set date\n");

            return(0);

        }

        return (0);

    }

    printf("%s\n",asctime(&tm_time));

    return(0);

}