setenv is declared as:
extern int setenv (const char *__name, const char *__value, int __replace)
__THROW __nonnull ((2));
And i->timezone can be NULL, if for example /etc/localtime is
missing. Previously that worked, but now result in a libc dumping
core, as seen with gcc 2.22, due to:
https://sourceware.org/ml/glibc-cvs/2015-q2/msg00075.html
old_tz = strdupa(tz);
/* Set the new $TZ */
- if (setenv("TZ", i->timezone, true) < 0)
+ if (i->timezone && setenv("TZ", i->timezone, true) < 0)
log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m");
else
tzset();