Sergey,

thanks for the patch, LGTM.

Sergey

2 июля 2026 г. 22:21:03 GMT+03:00, Sergey Kaplun <skaplun@tarantool.org> пишет:
>`os.time()` uses `mktime()` to specify time by the given table.
>`mktime()` produces the call to `tzset()` to determine the system's
>timezone. If the TZ variable does not appear in the environment, the
>system timezone is used. The system timezone is configured by copying,
>or linking, a file in the tzfile(5) format to /etc/localtime. So, if
>this file is omitted (like in RED OS), the errno is set to a non-zero
>value. This leads to the nil returned by the `os.time()` for -1 time
>value.
>
>This patch skips the test if this file is missed to be sure that we
>don't obtain any false positive failures due to system
>misconfigurations.
>---
>
>Branch: https://github.com/tarantool/luajit/tree/skaplun/fix-os-time-test-redos
>Failed workflow: https://github.com/tarantool/tarantool/actions/runs/28585213455/job/84775371860?pr=12886#step:5:20692
>
>Tested inside the following Docker:
>
>===================================================================
>FROM registry.red-soft.ru/ubi8/ubi-minimal:latest
>
>RUN dnf update -y && \
>    dnf install -y cmake vim make git curl gcc g++ gdb man && \
>    dnf clean all
>===================================================================
>
>| docker build . --tag redos
>| docker run --network=host -ti redos bash
>
>Then clone LuaJIT and proceed as usual.
>
>With the patch the test skipped:
>| 1..0 # SKIP Unconfigured timezone rules
>
>Changes in v2:
>
>* Skip patch not for RED OS but for all distributions with unconfigured
>  timezones (i.e. missing '/etc/localtime').
>
> .../lj-1470-os-time-epoch-minus-1s.test.lua   | 20 ++++++++++++++++++-
> 1 file changed, 19 insertions(+), 1 deletion(-)
>
>diff --git a/test/tarantool-tests/lj-1470-os-time-epoch-minus-1s.test.lua b/test/tarantool-tests/lj-1470-os-time-epoch-minus-1s.test.lua
>index dfe1ee11..48c6c3a3 100644
>--- a/test/tarantool-tests/lj-1470-os-time-epoch-minus-1s.test.lua
>+++ b/test/tarantool-tests/lj-1470-os-time-epoch-minus-1s.test.lua
>@@ -1,9 +1,27 @@
> local tap = require('tap')
> 
>+local function unconfigured_timezone()
>+  -- `os.time()` uses `mktime()` to specify time by the given
>+  -- table. `mktime()` produces the call to `tzset()` to determine
>+  -- the system's timezone.
>+  -- If the TZ variable does not appear in the environment, the
>+  -- system timezone is used. The system timezone is configured by
>+  -- copying, or linking, a file in the tzfile(5) format to
>+  -- /etc/localtime. So, if this file is omitted, the errno is
>+  -- set to a non-zero value. This leads to the nil returned by
>+  -- the `os.time()` for -1 time value. Let's skip the test if
>+  -- this file is missed to be sure that we don't obtain any false
>+  -- positive failures due to system misconfigurations.
>+  local f = io.open('/etc/localtime', 'r')
>+  return not f
>+end
>+
> -- The test file demonstrates os.time() fail to return -1 time
> -- value.
> -- See also: https://github.com/LuaJIT/LuaJIT/issues/1470.
>-local test = tap.test('lj-1470-os-time-epoch-minus-1s')
>+local test = tap.test('lj-1470-os-time-epoch-minus-1s'):skipcond({
>+  ['Unconfigured timezone rules'] = unconfigured_timezone(),
>+})
> 
> test:plan(1)
> 
>-- 
>2.54.0
>