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hwclock: use locale-specific date output format

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-07-08 06:40:25 +02:00
parent db43d3d418
commit 319b8bb355
1 changed files with 16 additions and 10 deletions
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26
util-linux/hwclock.c
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@ -60,25 +60,31 @@ static void show_clock(const char **pp_rtcname, int utc)
#if SHOW_HWCLOCK_DIFF
struct timeval sys_tv;
#endif
time_t t;
char *cp;
time_t t = read_rtc(pp_rtcname, &sys_tv, utc);
t = read_rtc(pp_rtcname, &sys_tv, utc);
cp = ctime(&t);
#if ENABLE_LOCALE_SUPPORT
/* Standard hwclock uses locale-specific output format */
char cp[64];
struct tm *ptm = localtime(&t);
strftime(cp, sizeof(cp), "%c", ptm);
#else
char *cp = ctime(&t);
strchrnul(cp, '\n')[0] = '\0';
#endif
#if !SHOW_HWCLOCK_DIFF
printf("%s 0.000000 seconds\n", cp);
#else
{
long diff = sys_tv.tv_sec - t;
if (diff < 0 /*&& tv.tv_usec != 0*/) {
/* Why? */
/* diff >= 0 is ok: diff < 0, can't just use tv.tv_usec: */
/* 45.520820 43.520820 */
/* - 44.000000 - 45.000000 */
/* = 1.520820 = -1.479180, not -2.520820! */
/* Why we need diff++? */
/* diff >= 0 is ok: | diff < 0, can't just use tv.tv_usec: */
/* 45.520820 | 43.520820 */
/* - 44.000000 | - 45.000000 */
/* = 1.520820 | = -1.479180, not -2.520820! */
diff++;
/* should be 1000000 - tv.tv_usec, but then we must check tv.tv_usec != 0 */
/* Should be 1000000 - tv.tv_usec, but then we must check tv.tv_usec != 0 */
sys_tv.tv_usec = 999999 - sys_tv.tv_usec;
}
printf("%s %ld.%06lu seconds\n", cp, diff, (unsigned long)sys_tv.tv_usec);