forkfd: Restore errno on exit from the SIGCHLD handler

I'd never thought about it, but it is a requirement: a signal handler
must leave the global state as it found it (except for those bits that
it intended to change, and those must be done in an async-signal-safe
way). Otherwise, errno could change from one line to the next in the
middle of some code.

[ChangeLog][QtCore][QProcess] On Unix, the QProcess SIGCHLD handler now
restores errno on exit.

Task-number: QTBUG-68472
Change-Id: If025d476890745368955fffd1531e7126f1436d9
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

0 files changed, 0 insertions, 0 deletions