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restore SIGCHLD sighandler to default before spawning a program - dwm - dynamic… |
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git clone git://git.suckless.org/dwm |
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commit e81f17d4c196aaed6893fd4beed49991caa3e2a4 |
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parent 348f6559ab0d4793db196ffa56ba96ab95a594a6 |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Sun, 9 Apr 2023 12:37:14 +0200 |
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restore SIGCHLD sighandler to default before spawning a program |
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From sigaction(2): |
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A child created via fork(2) inherits a copy of its parent's signal dispositions. |
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During an execve(2), the dispositions of handled signals are reset to the defau… |
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the dispositions of ignored signals are left unchanged. |
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This refused to start directly some programs from configuring in config.h: |
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static Key keys[] = { |
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MODKEY, XK_o, spawn, {.v = cmd } }, |
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}; |
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Some reported programs that didn't start were: mpv, anki, dmenu_extended. |
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Reported by pfx. |
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Initial patch suggestion by Storkman. |
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Diffstat: |
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M dwm.c | 8 ++++++++ |
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1 file changed, 8 insertions(+), 0 deletions(-) |
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--- |
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diff --git a/dwm.c b/dwm.c |
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@@ -1647,12 +1647,20 @@ showhide(Client *c) |
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void |
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spawn(const Arg *arg) |
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{ |
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+ struct sigaction sa; |
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+ |
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if (arg->v == dmenucmd) |
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dmenumon[0] = '0' + selmon->num; |
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if (fork() == 0) { |
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if (dpy) |
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close(ConnectionNumber(dpy)); |
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setsid(); |
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+ |
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+ sigemptyset(&sa.sa_mask); |
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+ sa.sa_flags = 0; |
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+ sa.sa_handler = SIG_DFL; |
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+ sigaction(SIGCHLD, &sa, NULL); |
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+ |
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execvp(((char **)arg->v)[0], (char **)arg->v); |
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die("dwm: execvp '%s' failed:", ((char **)arg->v)[0]); |
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} |
