0eb38598-e957-4014-b302-de8994feaebf
86%

Ran 11 Aug 2026 07:22PM UTC

Jobs 1

Files 5

Run time 1min

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Committed 11 Aug 2026 07:21PM UTC coverage: 86.38%. Remained the same

Build # 0eb38598-e957-4014-b302-de8994feaebf

Build Type

push

circleci

Committed by

fhunleth

Commit Message

Fix truncated output when a command exits

process_stdio() only forwards as much as the flow control window allows,
and child_wait_loop() stops polling the output fds once that window is
empty. Reaping the child returns immediately, so whatever is still in
the pipes is dropped, which is why the loss comes in whole windows.

Nothing surfaces this: cmd/3 returns a short binary next to a successful
exit status. A command writing 66890 bytes lost output in 40 of 40 runs
here, keeping as little as 10240 of them.

Everything the child wrote is in the pipe by the time it exits, so drain
before returning. A zero-timeout poll recognizes an already-empty pipe
for the cost of one syscall, and the window is refilled by waiting for
acks the way the exit path already does.

Coverage Stats

241 of 279 relevant lines covered (86.38%)

1777.78 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	0eb38598-e957-4014-b302-de8994feaebf.1	11 Aug 2026 07:22PM UTC	5	86.38	CircleCI Job

fhunleth / muontrap / 0eb38598-e957-4014-b302-de8994feaebf
86%

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fhunleth / muontrap / 0eb38598-e957-4014-b302-de8994feaebf 86%

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fhunleth / muontrap / 0eb38598-e957-4014-b302-de8994feaebf
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