Mike Gilbert
ff94426f8a
Setting this flag is a noop without a corresponding call to posix_spawnattr_setsigdefault. If we call posix_spawnattr_setsigdefault with a full signal set, it causes glibc's posix_spawn implementation to call sigaction 63 times, once for each signal. That seems wasteful. This feature is really only useful for signals which have their disposition set to SIG_IGN. Otherwise the dispostion gets set to SIG_DFL automatically, either by clone(CLONE_CLEAR_SIGHAND) or the subsequent execve. As far as I can tell, systemd does not have any signals set to SIG_IGN under normal operating conditions.
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