fix: close inherited file descriptors in child process on Linux - #867
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Prevents leaking file descriptors (pty master FDs, sockets, etc.) to child processes spawned via forkpty(). Uses close_range() syscall on Linux 5.9+, falling back to /proc/self/fd iteration, then brute force. macOS already handles this via POSIX_SPAWN_CLOEXEC_DEFAULT flag. Fixes #657 Part of microsoft/vscode#58814
Co-authored-by: Robo <hop2deep@gmail.com>
Co-authored-by: Robo <hop2deep@gmail.com>
Daniel Imms (Tyriar)
enabled auto-merge
January 13, 2026 15:23
Robo (deepak1556)
approved these changes
Jan 13, 2026
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Prevents leaking file descriptors (pty master FDs, sockets, etc.) to child processes spawned via forkpty(). Uses close_range() syscall on Linux 5.9+, falling back to /proc/self/fd iteration, then brute force.
macOS already handles this via POSIX_SPAWN_CLOEXEC_DEFAULT flag.
Fixes #657
Part of microsoft/vscode#58814