Public bug reported:
glibc version 2.28-0ubuntu1
If timezone is set to Dublin, strptime returns one hour less than it should.
Timezone set to London works fine, but Dublin and London are in the same time
zone. DST is not active.
mark@sotera:~/build-glibc$ TZ='Europe/Dublin'; ./test
t(orig)=1551972563
s=2019-03-07T15:29:23GMT+0000
calling strptime
t(new)=1551968963
s=2019-03-07T14:29:23
mark@sotera:~/build-glibc$ TZ='Europe/London'; ./test
t(orig)=1551972570
s=2019-03-07T15:29:30GMT+0000
calling strptime
t(new)=1551972570
s=2019-03-07T15:29:30
where test.c is the following:
#define _XOPEN_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
int main (void)
{
struct tm tms;
time_t t;
char s[100];
int sec;
t = time (NULL);
printf ("t(orig)=%d\n", (int) t);
gmtime_r (&t, &tms);
strftime (s, 90, "%Y-%m-%dT%H:%M:%S%Z%z", &tms);
printf ("s=%s\n", s);
memset (&tms, 0, sizeof (struct tm));
printf("calling strptime\n");
char *unproc = strptime (s, "%Y-%m-%dT%H:%M:%S%Z", &tms);
t = mktime(&tms);
printf ("t(new)=%d\n", (int) t);
gmtime_r (&t, &tms);
strftime (s, 90, "%Y-%m-%dT%H:%M:%S", &tms);
printf ("s=%s\n", s);
return 0;
}
** Affects: glibc (Ubuntu)
Importance: Undecided
Status: New
** Tags: glibc strptime
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https://bugs.launchpad.net/bugs/1819035
Title:
strptime loses one hour if TZ set to Dublin
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