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child_process: add subprocess.timedOut - #66639
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When the timeout option of spawn(), exec(), execFile() or fork() expires, the child is sent the kill signal and exits with that signal. Nothing told the caller that the timeout was the reason. Set subprocess.timedOut to true when the kill signal is sent because of the timeout, and add the same flag to the error passed to the exec() and execFile() callback. Fixes: nodejs#51561 Refs: nodejs#51608 Signed-off-by: marcopiraccini <marco.piraccini@gmail.com>
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October 10, 2026 09:25
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #66639 +/- ##
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- Coverage 92.78% 90.47% -2.31%
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Files 422 791 +369
Lines 193692 277097 +83405
Branches 29881 53279 +23398
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+ Hits 179718 250709 +70991
- Misses 13645 16813 +3168
- Partials 329 9575 +9246
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#66639 (comment) |
The cases where the timeout expires after the child exited gave the child 500 ms to start, spawn a descendant and exit, which a loaded macOS worker did not meet, so the timer killed the child instead. Let the child print the pid of the descendant and end it from the test once the timer has fired, with a timeout of three seconds. Signed-off-by: marcopiraccini <marco.piraccini@gmail.com>
The cases where the timeout expires after the child exited gave the child 500 ms to start, spawn a descendant and exit, which a loaded macOS worker did not meet, so the timer killed the child instead. Let the child print the pid of the descendant and end it from the test once the timer has fired, with a timeout of five seconds. Signed-off-by: marcopiraccini <marco.piraccini@gmail.com>
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When a child process receives its kill signal because
timeoutexpired, callers cannot distinguish that from a signal sent for another reason.Add
subprocess.timedOutforspawn(),exec(),execFile()andfork(), anderror.timedOuton errors returned byexec()andexecFile(). The flag becomestrueonly when the timeout successfully sends the signal; it does not guarantee that the process has terminated.This revisits #51608, which proposed the same property for #51561 but closed without landing. That review requested documentation and noted failing CI. This PR includes API documentation and regression tests for timeout expiry, normal exit, manual termination, non-timeout errors, and descendants keeping stdio open after the child exits.
Fixes: #51561
Refs: #51608