зеркало из https://github.com/mozilla/gecko-dev.git
3f4202c5c0
If we get `MSG_CTRUNC` back from `recvmsg` in this context, it means
a file descriptor couldn't be received; because the sender will never
attach too many fds, the only reasonable cause is fd exhaustion in the
receiving process. Therefore, we should return `EMFILE` ("Too many open
files") instead of `EMSGSIZE` ("Message too long") to reduce confusion
when reading log messages.
Differential Revision: https://phabricator.services.mozilla.com/D129891
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