Hello. Below is a patch for changing "UTC" into "UTC0" for TZ assignments. The former is not POSIX compliant. From /usr/src/lib/libc/time/Theory:
The POSIX TZ string takes the following form: stdoffset[dst[offset],date[/time],date[/time]] where: std and dst are 3 or more characters specifying the standard and daylight saving time (DST) zone names. Starting with POSIX.1-2001, std and dst may also be in a quoted form like "<UTC+10>"; this allows "+" and "-" in the names. offset is of the form `[-]hh:[mm[:ss]]' and specifies the ^ [This is wrong, the colon is optional in POSIX docs] offset west of UTC. The default DST offset is one hour ahead of standard time. While it makes no difference on OpenBSD, rpki-client-portable pulls from the OpenBSD tree. There are no other portable OpenBSD subprojects that need this change from what I could find. Also, it might be a good idea to check for time() and setenv() errors in these files. Index: output-json.c =================================================================== RCS file: /cvs/src/usr.sbin/rpki-client/output-json.c,v retrieving revision 1.13 diff -u -p -r1.13 output-json.c --- output-json.c 12 Sep 2020 15:46:48 -0000 1.13 +++ output-json.c 16 Sep 2020 07:00:00 -0000 @@ -30,7 +30,7 @@ outputheader_json(FILE *out, struct stat time_t t; time(&t); - setenv("TZ", "UTC", 1); + setenv("TZ", "UTC0", 1); tp = localtime(&t); strftime(tbuf, sizeof tbuf, "%FT%TZ", tp); Index: output.c =================================================================== RCS file: /cvs/src/usr.sbin/rpki-client/output.c,v retrieving revision 1.17 diff -u -p -r1.17 output.c --- output.c 12 Sep 2020 15:46:48 -0000 1.17 +++ output.c 16 Sep 2020 07:00:00 -0000 @@ -177,7 +177,7 @@ outputheader(FILE *out, struct stats *st time_t t; time(&t); - setenv("TZ", "UTC", 1); + setenv("TZ", "UTC0", 1); tp = localtime(&t); strftime(tbuf, sizeof tbuf, "%a %b %e %H:%M:%S %Z %Y", tp);