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https://github.com/cc65/cc65.git
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99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* Clock test program
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*
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* 25-Sep-2018, chris@groessler.org
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#ifdef __CC65__
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#include <conio.h>
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#include <cc65.h>
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#endif /* #ifdef __CC65__ */
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static void print_time(void)
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{
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struct tm *cur_tm;
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time_t cur_time = time(NULL);
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if (cur_time == -1) {
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printf("time() failed: %s\n", strerror(errno));
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return;
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}
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cur_tm = localtime(&cur_time);
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printf("time: %s\n", asctime(cur_tm));
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// DEBUG:
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printf("mday=%d mon=%d year=%d\nhour=%d min=%d sec=%d\n", cur_tm->tm_mday, cur_tm->tm_mon, cur_tm->tm_year, cur_tm->tm_hour, cur_tm->tm_min, cur_tm->tm_sec);
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}
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int main(int argc, char **argv)
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{
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char c = 0;
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int s;
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struct tm cur_time;
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struct timespec new_time;
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#ifdef __CC65__
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/* if DOS will automatically clear the screen after the program exits, wait for a keypress... */
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if (doesclrscrafterexit())
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atexit((void (*)(void))cgetc);
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#endif
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if (argc <= 1) {
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print_time();
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return 0;
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}
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if (argc != 3 || strcasecmp(*(argv + 1), "set")) {
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printf("usage: CLOCKTST [set DD-MM-YY-HH-MM-SS]\n");
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return 1;
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}
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memset(&cur_time, 0, sizeof(cur_time));
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s = sscanf(*(argv + 2), "%d-%d-%d-%d-%d-%d", &cur_time.tm_mday, &cur_time.tm_mon, &cur_time.tm_year, &cur_time.tm_hour, &cur_time.tm_min, &cur_time.tm_sec);
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if (s != 6 || cur_time.tm_year > 99 /* other input values aren't being verified... */) {
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printf("invalid time/date format\n");
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return 1;
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}
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--cur_time.tm_mon;
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if (cur_time.tm_year < 79)
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cur_time.tm_year += 100; /* adjust century */
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memset(&new_time, 0, sizeof(new_time));
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new_time.tv_sec = mktime(&cur_time);
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printf("\nyou are about to set the time to\n--> %s\n\nContinue (y/n)?", ctime(&new_time.tv_sec));
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while (c != 'y' && c != 'Y' && c != 'n' && c != 'N') {
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#ifdef __CC65__
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c = cgetc();
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#else
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c = getchar();
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#endif
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}
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printf("%c\n", c);
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if (c == 'n' || c == 'N') {
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printf("user abort\n");
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return 0;
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}
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s = clock_settime(CLOCK_REALTIME, &new_time);
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if (s) {
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printf("clock_settime() failed: %s\n", strerror(errno));
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return 1;
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}
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printf("time set!\n");
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//DEBUG test begin
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print_time();
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//DEBUG test end
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return 0;
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}
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/* Local Variables: */
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/* c-file-style: "cpg" */
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/* c-basic-offset: 4 */
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/* End: */
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