Minimal multi-process support (fork/exec/waitpid/pipe)#816

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wdcui wants to merge 23 commits into

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wdcui/multiproc-minimal

Commits on Apr 26, 2026

Implement minimal multi-process support (fork/exec/waitpid/pipe)
wdcui
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Phase 5-6: Fork-aware FD lifecycle, cross-process signals, SIGPIPE
wdcui
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Close-on-exec: close FD_CLOEXEC file descriptors during execve
wdcui
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Orphan reparenting: reparent children to init (pid 1) on parent exit
wdcui
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Process groups: setpgid/getpgid/getpgrp/setsid syscalls, kill to pgid
wdcui
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execve PATH resolution: search $PATH for binaries without '/'
wdcui
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Multi-threaded fork guard: reject fork when process has >1 threads
wdcui
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waitpid: support specific PID, process group, and own-group waits
wdcui
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Pipe readv/writev: implement pipe paths for scatter/gather I/O
wdcui
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Tests for kill/signal, waitpid WNOHANG, and PATH resolution
wdcui
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Fix review issues: fork bomb protection, signal mailbox cap, error handling hardening
wdcui
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Fix review round 2: wait4 race, PID/TID collision, error handling
wdcui
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Fix review round 3: vfork_done on detach failure, double cloexec, lock ordering
wdcui
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fix: resolve all clippy errors for CI (-Dwarnings)
wdcui
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fix: CI failures — fmt, if-let match guard, Windows AddressSpaceProvider
wdcui
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fix: CI failures — Windows AddressSpaceKind path, let_needless_return, test PID mismatch
wdcui
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fix: make exit_process graceful when PID not in registry, fix Windows test PID
wdcui
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Commits on May 1, 2026