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Centralize executable fixture creation to avoid Linux ETXTBSY races - #48727
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copyberry[bot] merged 1 commit intoSep 27, 2026
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…48727) ## Why Concurrent tests can inherit writable descriptors for executable fixtures, causing `ETXTBSY` when those fixtures launch on Linux. ## What changed Expose shared `write_executable` and `copy_executable` helpers from `codex_utils_cargo_bin` and adopt them in CLI, exec-server, and MCP tests. On Linux, writes and copies complete in separate processes so sibling test spawns cannot inherit the writable descriptors. Script fixtures receive mode `0o755`, and copied executables retain their source permissions. Remove the executable-busy retry loop from the program resolver test now that its script uses the shared helper. GitOrigin-RevId: 61624158190bb1e75c27d9eb9c87a2defc147fb7
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Centralize executable fixture creation to avoid Linux ETXTBSY races
Why
Concurrent tests can inherit writable descriptors for executable fixtures, causing
ETXTBSYwhen those fixtures launch on Linux.What changed
Expose shared
write_executableandcopy_executablehelpers fromcodex_utils_cargo_binand adopt them in CLI, exec-server, and MCP tests. On Linux, writes and copies complete in separate processes so sibling test spawns cannot inherit the writable descriptors. Script fixtures receive mode0o755, and copied executables retain their source permissions.Remove the executable-busy retry loop from the program resolver test now that its script uses the shared helper.