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hwclock: make it report system/rtc clock difference

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function                                             old     new   delta
rtc_tm2time                                            -      89     +89
read_rtc                                              23      86     +63
rtc_read_tm                                            -      49     +49
hwclock_main                                         428     466     +38
rtcwake_main                                         453     477     +24
rtc_read_time                                        142       -    -142
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 3/0 up/down: 263/-142)          Total: 121 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2010-01-06 22:43:39 +01:00
parent 695fa51c80
commit 5e3b14069e
4 changed files with 53 additions and 24 deletions
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18
libbb/rtc.c
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@ -59,15 +59,17 @@ int FAST_FUNC rtc_xopen(const char **default_rtc, int flags)
return xopen(*default_rtc, flags);
}
time_t FAST_FUNC rtc_read_time(int fd, int utc)
void FAST_FUNC rtc_read_tm(struct tm *tm, int fd)
{
struct tm tm;
char *oldtz = 0;
time_t t = 0;
memset(tm, 0, sizeof(*tm));
xioctl(fd, RTC_RD_TIME, tm);
tm->tm_isdst = -1; /* "not known" */
}
memset(&tm, 0, sizeof(struct tm));
xioctl(fd, RTC_RD_TIME, &tm);
tm.tm_isdst = -1; /* not known */
time_t FAST_FUNC rtc_tm2time(struct tm *tm, int utc)
{
char *oldtz = oldtz; /* for compiler */
time_t t;
if (utc) {
oldtz = getenv("TZ");
@ -75,7 +77,7 @@ time_t FAST_FUNC rtc_read_time(int fd, int utc)
tzset();
}
t = mktime(&tm);
t = mktime(tm);
if (utc) {
unsetenv("TZ");