From: Paul Eggert <eggert@cs.ucla.edu>
To: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>, emacs-devel@gnu.org
Subject: Re: SIGCHLD in vfork child context
Date: Tue, 16 May 2017 01:58:37 -0700 [thread overview]
Message-ID: <a8f4c9e7-e11f-a33d-e5a0-c4137932ff0b@cs.ucla.edu> (raw)
In-Reply-To: <wl4lwp5n4o.wl%mituharu@math.s.chiba-u.ac.jp>
YAMAMOTO Mitsuharu wrote:
> It seems that calling waitpid from the SIGCHLD handler results in
> ECHILD in the vfork child context
Why is the vfork child process getting a SIGCHLD signal? That process doesn't
have any children. Is the macOS kernel simply buggy? If so, I suggest adding a
short explanation of the situation to this comment:
> + /* Call the SIGCHLD handler in case we have received SIGCHLD in
> + the vfork child context. The signal mask is restored by
> + unblock_child_signal below. */
If not, then I don't understand the situation....
> + (*action.sa_handler) (SIGCHLD);
No need for the * and the first set of parens. I.e., this is OK:
action.sa_handler (SIGCHLD);
Otherwise, looks OK; thanks.
next prev parent reply other threads:[~2017-05-16 8:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-13 5:41 SIGCHLD in vfork child context YAMAMOTO Mitsuharu
2017-05-15 1:04 ` YAMAMOTO Mitsuharu
2017-05-16 8:58 ` Paul Eggert [this message]
2017-05-16 9:19 ` Andreas Schwab
2017-05-16 9:50 ` Paul Eggert
2017-05-16 10:22 ` Andreas Schwab
2017-05-19 7:16 ` Paul Eggert
2017-05-19 3:19 ` YAMAMOTO Mitsuharu
2017-05-19 7:18 ` Paul Eggert
2017-05-20 8:22 ` YAMAMOTO Mitsuharu
2017-05-21 8:49 ` Paul Eggert
2017-05-21 8:53 ` mituharu
2017-05-21 9:01 ` Paul Eggert
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