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Support setting signal masks for child processes on Unix #100737

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Closed

Support setting signal masks for child processes on Unix #100737

wants to merge 2 commits into from
+238 −26

Commits on Aug 27, 2022

  1. Implement sigdelset and sigismember for Android 

    We're going to need this for upcoming signal mask support.
    @sunshowers
    sunshowers committed Aug 27, 2022
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  2. Support blocking and unblocking signals for child processes on Unix 

    This commit implements basic support for setting signal masks during process spawning.

* With the `posix_spawn` code path, this means setting `posix_spawnattr_setsigmask`.
* With the `fork/exec` path, this means calling `pthread_sigmask` in the child before executing it.

This also fixes a bug: previously, we were always setting the signal mask to
the empty set, breaking tools like `nohup`. With this change, we inherit
the signal mask from the parent by default.
    @sunshowers
    sunshowers committed Aug 27, 2022
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