fix(darwin): reap DNS cache flush process - #17
Open
kvvipa0028 wants to merge 1 commit into
Open
Conversation
kvvipa0028
marked this pull request as ready for review
August 24, 2026 06:16
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Why
On Darwin,
flushDNSCachestartsdscacheutil -flushcachewithCmd.Startand then discards the command. A successfully startedos/exec.Cmdmust be followed byWait; otherwise completed children can remain as zombies until the long-running parent exits. Repeated TUN create/close cycles can therefore accumulate zombiedscacheutilprocesses.What changed
Use
Cmd.Runfor the DNS cache flush so the child is waited for and reaped after it exits. The existing best-effort behavior is retained by ignoring the returned error.Verification
make testgo test .go vet .git diff --check