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authorNRK <nrk@disroot.org>2022-07-14 07:26:40 +0600
committerHiltjo Posthuma <hiltjo@codemadness.org>2022-07-15 20:53:58 +0200
commit6613d9f9a1a5630bab30bc2b70bdc793977073ee (patch)
tree914cd55c1688ed675fab188ac562b17904471da1
parent9bffa845faa181fb3afe05f3dc86ad79c80736be (diff)
downloaddwm-6613d9f9a1a5630bab30bc2b70bdc793977073ee.tar.gz
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`.
-rw-r--r--dwm.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/dwm.c b/dwm.c
index b3c43ee..7c0f978 100644
--- 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));
}