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LibC: Invoke tzset from time functions required to update time zone info

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From POSIX:

    the ctime(), localtime(), mktime(), strftime(), and strftime_l()
    functions are required to set timezone information as if by calling
    tzset()

ctime is excluded here because it invokes localtime, so there's no need
to invoke tzset twice.
This commit is contained in:
Timothy Flynn 2022-01-24 15:08:10 -05:00 • committed by Linus Groh
parent b1ea585149
commit 11f1f04a4c
1 changed files with 5 additions and 0 deletions
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5
Userland/Libraries/LibC/time.cpp
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@ -145,11 +145,14 @@ static time_t tm_to_time(struct tm* tm, long timezone_adjust_seconds)
time_t mktime(struct tm* tm)
{
tzset();
return tm_to_time(tm, timezone);
}
struct tm* localtime(const time_t* t)
{
tzset();
static struct tm tm_buf;
return localtime_r(t, &tm_buf);
}
@ -209,6 +212,8 @@ char* asctime_r(const struct tm* tm, char* buffer)
// FIXME: Some formats are not supported.
size_t strftime(char* destination, size_t max_size, const char* format, const struct tm* tm)
{
tzset();
const char wday_short_names[7][4] = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};