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rehash: fix race condition in landlock writability check (#3483)

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Yo Takezawa 2026-06-27 03:04:33 +09:00 committed by GitHub
parent ebd788d08c
commit 3974647f0f
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1 changed files with 3 additions and 1 deletions
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libexec/pyenv-rehash
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@ -28,7 +28,9 @@ acquire_lock() {
# So check for writablity by trying to write to a different file, # So check for writablity by trying to write to a different file,
# in a way that taxes the usual use case as little as possible. # in a way that taxes the usual use case as little as possible.
if [[ -z $tested_for_other_write_errors ]]; then if [[ -z $tested_for_other_write_errors ]]; then
( t="$(TMPDIR="$SHIM_PATH" mktemp)" && rm "$t" ) \ # if lots of (50+) rehashes run concurrently, another concurrent rehash
# may delete the temporary file in remove_*_shims() before we do so
( t="$(TMPDIR="$SHIM_PATH" mktemp)" && rm -f "$t" ) \
&& tested_for_other_write_errors=1 \ && tested_for_other_write_errors=1 \
|| { echo "pyenv: cannot rehash: $SHIM_PATH isn't writable" >&2 || { echo "pyenv: cannot rehash: $SHIM_PATH isn't writable" >&2
set +o noclobber set +o noclobber