Commits on Mar 9, 2022

1. wait: implement waitid() …

   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

   

   neocturne committed Mar 9, 2022
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