wait: implement waitid() #1584
wait: implement waitid() #1584
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neocturne
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| /// Wait for a process to change status | ||
| /// | ||
| /// See also [waitid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/waitid.html) | ||
| #[cfg(any( |
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libc defines this function for almost all OSes. I think it might be everything except Redox. Any reason not to enable it for all of them in Nix?
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I started with the list of platforms for which WEXITED is defined in WaitPidFlag and then removed all that had some obvious issue:
- NetBSD has broken siginfo_t in libc (see issue linked in PR description)
- Apple/IOS are missing CLD_EXITED/KILLED/DUMPED in libc (and I don't really want to open another libc PR for a system that I do not use and that I'm not familiar with...)
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@NeoRaider can you rebase this? It isn't conflicting on GitHub, but local testing shows the changelog will merge into the |
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Rebased and updated commit message to reflect the current status of the mentioned qemu-user issue. |
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Hmm, seems I'll have to update the test code as well. |
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bors r+ |
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Merge conflict. |
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Another PR went in first and modified the changelog in the same spot. Can you rebase? |
waitid() has a number of additional features that waitpid() is missing: - WNOWAIT is only accepted for waitid() on Linux (and possibly other platforms) - Support for waiting on PID file descriptors on Linux For now support is added for all platforms with waitid() that have proper siginfo_t support in libc. NetBSD support is currently a work in progress [1]. Tests for the signal/exit code are currently skipped on MIPS platforms due to bugs in qemu-user's translation of siginfo_t (fixed in [2] and [3]; the second fix is not in a released qemu version yet). [1] rust-lang/libc#2476 [2] https://lists.nongnu.org/archive/html/qemu-devel/2021-01/msg04810.html [3] https://lists.nongnu.org/archive/html/qemu-devel/2021-10/msg05433.html
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bors r+ |
waitid() has a number of additional features that waitpid() is missing:
For now support is added for all platforms with waitid() that have proper siginfo_t support in libc. NetBSD support is currently a work in progress [1].
Tests for the signal/exit code are currently skipped on MIPS platforms due to multiple bugs in qemu-user in the translation of siginfo_t (one fixed in January [2], one currently under review [3]).
[1] rust-lang/libc#2476
[2] https://lists.nongnu.org/archive/html/qemu-devel/2021-01/msg04810.html
[3] https://lists.nongnu.org/archive/html/qemu-devel/2021-10/msg05433.html