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Revert "remove sigchld function"

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This reverts commit 1fa72b07728ebb396a9f236921b81c369bb12ccb.
Fixes #97.
This commit is contained in:
Devin J. Pohly 2021-03-13 10:42:33 -06:00
parent 1fa72b0772
commit 43b6e804cf
1 changed files with 17 additions and 3 deletions
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dwl.c
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@ -278,6 +278,7 @@ static void setlayout(const Arg *arg);
static void setmfact(const Arg *arg);
static void setmon(Client *c, Monitor *m, unsigned int newtags);
static void setup(void);
static void sigchld(int unused);
static void spawn(const Arg *arg);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
@ -1983,9 +1984,8 @@ setup(void)
* clients from the Unix socket, manging Wayland globals, and so on. */
dpy = wl_display_create();
/* Indicate explicitly to the OS that we are not interested in info
* about child processes (per POSIX.1-2001) */
signal(SIGCHLD, SIG_IGN);
/* clean up child processes immediately */
sigchld(0);
/* The backend is a wlroots feature which abstracts the underlying input and
* output hardware. The autocreate option will choose the most suitable
@ -2136,6 +2136,20 @@ setup(void)
#endif
}
void
sigchld(int unused)
{
/* We should be able to remove this function in favor of a simple
* signal(SIGCHLD, SIG_IGN);
* but the Xwayland implementation in wlroots currently prevents us from
* setting our own disposition for SIGCHLD.
*/
if (signal(SIGCHLD, sigchld) == SIG_ERR)
EBARF("can't install SIGCHLD handler");
while (0 < waitpid(-1, NULL, WNOHANG))
;
}
void
spawn(const Arg *arg)
{