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MonitorFdHup: raise explicit SysError rather unreachable

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Syscalls can fail for many reasons and we don't want to loose the errno
and error context.
This commit is contained in:
Jörg Thalheim 2025-03-21 16:23:31 +01:00 • committed by John Ericson
parent 041394b741
commit 8e0bc2c3a8
1 changed files with 5 additions and 2 deletions
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7
src/libutil/unix/monitor-fd.hh
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@ -39,8 +39,11 @@ public:
#endif
;
auto count = poll(fds, 1, -1);
if (count == -1)
unreachable();
if (count == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
throw SysError("failed to poll() in MonitorFdHup");
}
/* This shouldn't happen, but can on macOS due to a bug.
See rdar://37550628.