fix race condition between sigwinch and sigchld - scroll - scrollbackbuffer program for st
HTML git clone git://git.suckless.org/scroll
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit 1dbf2dce08892df710645ddbd2ce12759ec95078
DIR parent 58c58743d8f391ef0e4776fc46d92c824795d162
HTML Author: Jan Klemkow <j.klemkow@wemelug.de>
Date: Thu, 30 Apr 2020 22:12:50 +0200
fix race condition between sigwinch and sigchld
sigwinch died if it tries to set the window size
to a file descriptor of an exited child. Thus,
we just ignore this error in that situation.
Diffstat:
M scroll.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
---
DIR diff --git a/scroll.c b/scroll.c
@@ -96,8 +96,11 @@ sigwinch(int sig)
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
die("ioctl:");
- if (ioctl(mfd, TIOCSWINSZ, &ws) == -1)
+ if (ioctl(mfd, TIOCSWINSZ, &ws) == -1) {
+ if (errno == EBADF) /* child already exited */
+ return;
die("ioctl:");
+ }
kill(-child, SIGWINCH);
doredraw = true;
}