dwm

personal fork of dwm (rnpnr branch)
git clone anongit@rnpnr.xyz:dwm.git
Log | Files | Refs | Feed | README | LICENSE

Commit: e81f17d4c196aaed6893fd4beed49991caa3e2a4
Parent: 348f6559ab0d4793db196ffa56ba96ab95a594a6
Author: Hiltjo Posthuma
Date:   Sun,  9 Apr 2023 12:37:14 +0200

restore SIGCHLD sighandler to default before spawning a program

From sigaction(2):
A child created via fork(2) inherits a copy of its parent's signal dispositions.
During an execve(2), the dispositions of handled signals are reset to the default;
the dispositions of ignored signals are left unchanged.

This refused to start directly some programs from configuring in config.h:

static Key keys[] = {
	MODKEY,                       XK_o,      spawn,          {.v = cmd } },
};

Some reported programs that didn't start were: mpv, anki, dmenu_extended.

Reported by pfx.
Initial patch suggestion by Storkman.

Diffstat:
Mdwm.c | 8++++++++
1 file changed, 8 insertions(+), 0 deletions(-)

diff --git a/dwm.c b/dwm.c @@ -1647,12 +1647,20 @@ showhide(Client *c) void spawn(const Arg *arg) { + struct sigaction sa; + if (arg->v == dmenucmd) dmenumon[0] = '0' + selmon->num; if (fork() == 0) { if (dpy) close(ConnectionNumber(dpy)); setsid(); + + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + sa.sa_handler = SIG_DFL; + sigaction(SIGCHLD, &sa, NULL); + execvp(((char **)arg->v)[0], (char **)arg->v); die("dwm: execvp '%s' failed:", ((char **)arg->v)[0]); }