dwm

dynamic window manager
git clone git://git.suckless.org/dwm
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commit 6613d9f9a1a5630bab30bc2b70bdc793977073ee
parent 9bffa845faa181fb3afe05f3dc86ad79c80736be
Author: NRK <nrk@disroot.org>
Date:   Thu, 14 Jul 2022 07:26:40 +0600

do not call signal-unsafe function inside sighanlder

die() calls vprintf, fputc and exit; none of these are
async-signal-safe, see `man 7 signal-safety`.

Diffstat:
Mdwm.c | 4++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dwm.c b/dwm.c @@ -1541,6 +1541,8 @@ setup(void) Atom utf8string; /* clean up any zombies immediately */ + if (signal(SIGCHLD, sigchld) == SIG_ERR) + die("can't install SIGCHLD handler:"); sigchld(0); /* init screen */ @@ -1638,8 +1640,6 @@ showhide(Client *c) void sigchld(int unused) { - if (signal(SIGCHLD, sigchld) == SIG_ERR) - die("can't install SIGCHLD handler:"); while (0 < waitpid(-1, NULL, WNOHANG)); }