From d615d3836c8a4091a9fc7f5313e517f04df48601 Mon Sep 17 00:00:00 2001 From: "Devin J. Pohly" Date: Tue, 18 Aug 2020 18:22:44 -0500 Subject: Use SIGCHLD handler from dwm Fixes #46. --- dwl.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/dwl.c b/dwl.c index c4af87e..18c2b33 100644 --- a/dwl.c +++ b/dwl.c @@ -224,6 +224,7 @@ 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); @@ -1458,6 +1459,9 @@ setsel(struct wl_listener *listener, void *data) void setup(void) { + /* 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 * backend based on the current environment, such as opening an X11 window @@ -1579,6 +1583,17 @@ setup(void) #endif } +void +sigchld(int unused) +{ + if (signal(SIGCHLD, sigchld) == SIG_ERR) { + perror("can't install SIGCHLD handler"); + exit(EXIT_FAILURE); + } + while (0 < waitpid(-1, NULL, WNOHANG)) + ; +} + void spawn(const Arg *arg) { -- cgit v1.2.3