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always reset DST rules during tzset

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do_tzset() did't always reset the DST transition rules r0 and r1. That
means the rules from older TZ settings could leak into newer ones.
This commit is contained in:
Benjamin Peterson 2018-09-15 10:05:24 -07:00 committed by Rich Felker
parent d6c855caa8
commit dbcfb16e43
1 changed files with 2 additions and 1 deletions
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3
src/time/__tz.c
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@ -130,6 +130,8 @@ static void do_tzset()
if (old_tz && !strcmp(s, old_tz)) return;
for (i=0; i<5; i++) r0[i] = r1[i] = 0;
if (zi) __munmap((void *)zi, map_size);
/* Cache the old value of TZ to check if it has changed. Avoid
@ -194,7 +196,6 @@ static void do_tzset()
const unsigned char *p;
__tzname[0] = __tzname[1] = 0;
__daylight = __timezone = dst_off = 0;
for (i=0; i<5; i++) r0[i] = r1[i] = 0;
for (p=types; p<abbrevs; p+=6) {
if (!p[4] && !__tzname[0]) {
__tzname[0] = (char *)abbrevs + p[5];