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Mark both ends of self-pipe a nonblocking.

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While no deadlocks caused by the blocking write end have been reported
yet, marking both ends nonblocking is consistent and also recommended
in the GNU/Linux manpage of 'select'.

* src/process.c (child_signal_init): Mark write end of self-pipe as
nonblocking.
This commit is contained in:
Philipp Stephani 2021-01-23 17:24:34 +01:00
parent 6a6fde0375
commit aeff424c55
1 changed files with 2 additions and 0 deletions
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2
src/process.c
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@ -7195,6 +7195,8 @@ child_signal_init (void)
eassert (0 <= fds[1]);
if (fcntl (fds[0], F_SETFL, O_NONBLOCK) != 0)
emacs_perror ("fcntl");
if (fcntl (fds[1], F_SETFL, O_NONBLOCK) != 0)
emacs_perror ("fcntl");
add_read_fd (fds[0], child_signal_read, NULL);
fd_callback_info[fds[0]].flags &= ~KEYBOARD_FD;
child_signal_read_fd = fds[0];