[hackers] [dwm] Revert "do not call signal-unsafe function inside sighanlder" || Hiltjo Posthuma

[git]

commit e03248a4d5feaaacb130416be6e467a04de81f78
Author:     Hiltjo Posthuma <hil...@codemadness.org>
AuthorDate: Fri Jul 22 09:18:52 2022 +0200
Commit:     Hiltjo Posthuma <hil...@codemadness.org>
CommitDate: Fri Jul 22 09:18:52 2022 +0200

    Revert "do not call signal-unsafe function inside sighanlder"
    
    This reverts commit 6613d9f9a1a5630bab30bc2b70bdc793977073ee.
    
    Discussed on the mailinglist:
    https://lists.suckless.org/hackers/2207/18405.html

diff --git a/dwm.c b/dwm.c
index 7c0f978..b3c43ee 100644
--- a/dwm.c
+++ b/dwm.c
@@ -1541,8 +1541,6 @@ 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 */
@@ -1640,6 +1638,8 @@ 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));
 }