On 07/19/11 06:29, Kay Sievers wrote:
On Tue, Jul 19, 2011 at 14:20, Kelly Anderson
<[email protected]> wrote:
On 07/19/11 06:04, Kay Sievers wrote:
On Tue, Jul 19, 2011 at 13:22, Kelly Anderson
<[email protected]> wrote:
The following commit introduces a bogus error message on boot since
localtime may be a negative number, i.e. GMT-7.
The following patch just uses errno directly rather than using it
indirectly
through hwclock_apply_localtime_delta():
Ah, tm->tm_gmtoff can be negative.
+ errno = 0;
min = hwclock_apply_localtime_delta();
We usually prefer to return the errno instead of mangling it at the
caller's side, and have the values that can be negative passed as
arguments. Mind switching that? Or let me know.
Thanks,
Kay
Something along the lines of:
int status = hwclock_apply_localtime_delta(&min)
Is that what you mean? If that's what you're looking for, I could do that.
Yeah, we like to return errno-like values directly wherever possible.
It's a bit like the kernel's function style. Only things that can only
fail in one way only, like ENOMEM, can return the object or the NULL
pointer.
That means we need to pass the values as arguments. In timedated.c the
value isn't even used, so allowing hwclock_apply_localtime_delta(NULL)
might be nice.
Kay
Kay
OK,
Here's a patch that should have the desired results:
--- ./src/util.h.orig 2011-07-11 20:07:58.000000000 -0600
+++ ./src/util.h 2011-07-19 07:24:50.593040702 -0600
@@ -435,7 +435,7 @@ int conf_files_list(char ***strv, const
int hwclock_is_localtime(void);
-int hwclock_apply_localtime_delta(void);
+int hwclock_apply_localtime_delta(int *min);
int hwclock_reset_localtime_delta(void);
int hwclock_get_time(struct tm *tm);
int hwclock_set_time(const struct tm *tm);
--- ./src/main.c.orig 2011-07-11 20:07:58.000000000 -0600
+++ ./src/main.c 2011-07-19 07:28:27.362064963 -0600
@@ -1058,9 +1058,9 @@ int main(int argc, char *argv[]) {
if (hwclock_is_localtime() > 0) {
int min;
- min = hwclock_apply_localtime_delta();
- if (min < 0)
- log_error("Failed to apply local time
delta: %s", strerror(-min));
+ int rc = hwclock_apply_localtime_delta(&min);
+ if (rc < 0)
+ log_error("Failed to apply local time
delta: %s", strerror(-rc));
else
log_info("RTC configured in localtime,
applying delta of %i minutes to system time.", min);
}
--- ./src/util.c.orig 2011-07-11 20:07:58.000000000 -0600
+++ ./src/util.c 2011-07-19 07:29:04.300728483 -0600
@@ -4905,7 +4905,7 @@ int hwclock_is_localtime(void) {
return local;
}
-int hwclock_apply_localtime_delta(void) {
+int hwclock_apply_localtime_delta(int *min) {
const struct timeval *tv_null = NULL;
struct timespec ts;
struct tm *tm;
@@ -4916,6 +4916,9 @@ int hwclock_apply_localtime_delta(void)
assert_se(tm = localtime(&ts.tv_sec));
minuteswest = tm->tm_gmtoff / 60;
+ if ( min )
+ *min = minuteswest;
+
tz.tz_minuteswest = -minuteswest;
tz.tz_dsttime = 0; /* DST_NONE*/
@@ -4924,10 +4927,7 @@ int hwclock_apply_localtime_delta(void)
* The very first time we set the kernel's timezone, it will warp
* the clock so that it runs in UTC instead of local time.
*/
- if (settimeofday(tv_null, &tz) < 0)
- return -errno;
-
- return minuteswest;
+ return (settimeofday(tv_null, &tz) < 0) ? -errno : 0;
}
int hwclock_reset_localtime_delta(void) {
--- ./src/timedated.c.orig 2011-06-29 17:59:24.000000000 -0600
+++ ./src/timedated.c 2011-07-19 07:27:24.959633340 -0600
@@ -332,7 +332,7 @@ static DBusHandlerResult timedate_messag
struct tm *tm;
/* 2. Teach kernel new timezone */
- hwclock_apply_localtime_delta();
+ hwclock_apply_localtime_delta(NULL);
/* 3. Sync RTC from system clock, with
the new delta */
assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
@@ -382,7 +382,7 @@ static DBusHandlerResult timedate_messag
/* 2. Teach kernel new timezone */
if (local_rtc)
- hwclock_apply_localtime_delta();
+ hwclock_apply_localtime_delta(NULL);
else
hwclock_reset_localtime_delta();
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