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scd: Fix for GNU/Linux suspend/resume.

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* configure.ac (require_pipe_to_unblock_pselect): Default is "yes".
* scd/scdaemon.c (scd_kick_the_loop): Minor clean up.

--

Normally SIGCONT or SIGUSR2 works for unblocking pselect.  But on my
machine with GNU/Linux, when a machine is suspend/resume-ed, pselect
keeps blocked, while signal itself is delivered.

It's better to use pipe.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2018-03-13 12:05:57 +09:00
parent 655f0b9ad0
commit 71e5282c25
2 changed files with 4 additions and 5 deletions
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6
scd/scdaemon.c
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@ -1206,18 +1206,16 @@ start_connection_thread (void *arg)
void
scd_kick_the_loop (void)
{
int ret;
/* Kick the select loop. */
#ifdef HAVE_W32_SYSTEM
ret = SetEvent (the_event);
int ret = SetEvent (the_event);
if (ret == 0)
log_error ("SetEvent for scd_kick_the_loop failed: %s\n",
w32_strerror (-1));
#elif defined(HAVE_PSELECT_NO_EINTR)
write (notify_fd, "", 1);
#else
ret = kill (main_thread_pid, SIGCONT);
int ret = kill (main_thread_pid, SIGCONT);
if (ret < 0)
log_error ("SetEvent for scd_kick_the_loop failed: %s\n",
gpg_strerror (gpg_error_from_syserror ()));