Signal handlers must preserve errno - #219
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If a signal handler executes a system call, the errno may be modified. After return to the main program, this new errno does not reflect the error of the previously failed system call in the main context. Common pattern for signal handlers is to save and restore the errno. Signed-off-by: Alexander Bluhm <bluhm@openbsd.org>
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If a signal handler executes a system call, the errno may be modified. After return to the main program, this new errno does not reflect the error of the previously failed system call in the main context. Common pattern for signal handlers is to save and restore the errno.