gniibe at fsij.org
Tue Jan 15 04:06:22 CET 2013
I am bitten by my own change of:
Author: NIIBE Yutaka <gniibe at fsij.org>
Date: Fri Dec 16 09:07:56 2011 +0900
Don't kill pinentry by SIGKILL but let it quit by SIGINT.
* agent/call-pinentry.c (agent_popup_message_stop): To pinentry, send
SIGINT (was: SIGKILL).
The window of pinentry doesn't pop down, now.
This change was done because of pinentry-curses. With
pinentry-curses, when it is killed by SIGINT, terminal gets confused.
I figured out that the problem here is signal mask. To handle
signals, GPG-Agent has signal mask for SIGHUP, SIGUSR1, SIGUSR2,
SIGINT and SIGTERM. Then, pinentry will be fork/exec-ed with this
signal mask, and SIGINT will not be delivered because of this mask.
We need to call pthread_atfork to unmask signals for child processes
I'm not sure where to implement unmasking signals.
It should be GnuPG which calls pthread_atfork for 2.0 branch. But
it's common things among applications, it would be npth_sigev_fini
which calls pthread_atfork for master branch.
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