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https://codeberg.org/dwl/dwl.git
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Unify signal handling under wl_event_loop
Merge our signal handlers into a single function and let Wayland deal with all the struct sigaction stuff. ΔSLOC: -3
This commit is contained in:
Devin J. Pohly
Leonardo Hernández
parent
eda0613cc4
commit
fbd84aca4a
1 changed files with 35 additions and 48 deletions
83
dwl.c
83
dwl.c
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@ -260,6 +260,7 @@ static void focusmon(const Arg *arg);
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static void focusstack(const Arg *arg);
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static Client *focustop(Monitor *m);
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static void fullscreennotify(struct wl_listener *listener, void *data);
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static int handlesig(int signo, void *data);
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static void incnmaster(const Arg *arg);
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static void inputdevice(struct wl_listener *listener, void *data);
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static int keybinding(uint32_t mods, xkb_keysym_t sym);
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@ -283,7 +284,6 @@ static void pointerfocus(Client *c, struct wlr_surface *surface,
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double sx, double sy, uint32_t time);
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static void printstatus(void);
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static void quit(const Arg *arg);
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static void quitsignal(int signo);
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static void rendermon(struct wl_listener *listener, void *data);
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static void requeststartdrag(struct wl_listener *listener, void *data);
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static void resize(Client *c, struct wlr_box geo, int interact);
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@ -297,7 +297,6 @@ static void setmon(Client *c, Monitor *m, uint32_t newtags);
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static void setpsel(struct wl_listener *listener, void *data);
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static void setsel(struct wl_listener *listener, void *data);
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static void setup(void);
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static void sigchld(int unused);
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static void spawn(const Arg *arg);
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static void startdrag(struct wl_listener *listener, void *data);
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static void tag(const Arg *arg);
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@ -327,6 +326,8 @@ static pid_t child_pid = -1;
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static int locked;
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static void *exclusive_focus;
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static struct wl_display *dpy;
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static struct wl_event_loop *eventloop;
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static struct wl_event_source *sighandler[4];
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static struct wlr_backend *backend;
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static struct wlr_scene *scene;
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static struct wlr_scene_tree *layers[NUM_LAYERS];
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@ -652,6 +653,7 @@ checkidleinhibitor(struct wlr_surface *exclude)
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void
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cleanup(void)
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{
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int i;
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#ifdef XWAYLAND
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wlr_xwayland_destroy(xwayland);
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#endif
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@ -667,6 +669,8 @@ cleanup(void)
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wlr_cursor_destroy(cursor);
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wlr_output_layout_destroy(output_layout);
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wlr_seat_destroy(seat);
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for (i = 0; i < LENGTH(sighandler); i++)
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wl_event_source_remove(sighandler[i]);
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wl_display_destroy(dpy);
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}
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@ -820,8 +824,7 @@ createkeyboard(struct wlr_keyboard *keyboard)
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wlr_seat_set_keyboard(seat, keyboard);
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kb->key_repeat_source = wl_event_loop_add_timer(
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wl_display_get_event_loop(dpy), keyrepeat, kb);
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kb->key_repeat_source = wl_event_loop_add_timer(eventloop, keyrepeat, kb);
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/* And add the keyboard to our list of keyboards */
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wl_list_insert(&keyboards, &kb->link);
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@ -1333,6 +1336,28 @@ fullscreennotify(struct wl_listener *listener, void *data)
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setfullscreen(c, client_wants_fullscreen(c));
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}
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int
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handlesig(int signo, void *data)
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{
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if (signo == SIGCHLD) {
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#ifdef XWAYLAND
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siginfo_t in;
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/* wlroots expects to reap the XWayland process itself, so we
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* use WNOWAIT to keep the child waitable until we know it's not
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* XWayland.
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*/
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while (!waitid(P_ALL, 0, &in, WEXITED|WNOHANG|WNOWAIT) && in.si_pid
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&& (!xwayland || in.si_pid != xwayland->server->pid))
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waitpid(in.si_pid, NULL, 0);
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#else
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while (waitpid(-1, NULL, WNOHANG) > 0);
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#endif
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} else if (signo == SIGINT || signo == SIGTERM) {
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quit(NULL);
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}
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return 0;
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}
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void
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incnmaster(const Arg *arg)
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{
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@ -1875,12 +1900,6 @@ quit(const Arg *arg)
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wl_display_terminate(dpy);
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}
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void
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quitsignal(int signo)
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{
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quit(NULL);
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}
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void
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rendermon(struct wl_listener *listener, void *data)
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{
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@ -1944,8 +1963,6 @@ run(char *startup_cmd)
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{
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/* Add a Unix socket to the Wayland display. */
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const char *socket = wl_display_add_socket_auto(dpy);
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struct sigaction sa = {.sa_flags = SA_RESTART, .sa_handler = SIG_IGN};
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sigemptyset(&sa.sa_mask);
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if (!socket)
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die("startup: display_add_socket_auto");
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setenv("WAYLAND_DISPLAY", socket, 1);
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@ -1973,8 +1990,6 @@ run(char *startup_cmd)
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close(piperw[1]);
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close(piperw[0]);
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}
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/* If nobody is reading the status output, don't terminate */
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sigaction(SIGPIPE, &sa, NULL);
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printstatus();
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/* At this point the outputs are initialized, choose initial selmon based on
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@ -2127,20 +2142,14 @@ setsel(struct wl_listener *listener, void *data)
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void
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setup(void)
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{
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int layer;
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/* Set up signal handlers */
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struct sigaction sa = {.sa_flags = SA_RESTART, .sa_handler = sigchld};
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sigemptyset(&sa.sa_mask);
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sigaction(SIGCHLD, &sa, NULL);
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sa.sa_handler = quitsignal;
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sigaction(SIGINT, &sa, NULL);
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sigaction(SIGTERM, &sa, NULL);
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int i, sig[] = {SIGCHLD, SIGINT, SIGTERM, SIGPIPE};
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/* The Wayland display is managed by libwayland. It handles accepting
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* clients from the Unix socket, manging Wayland globals, and so on. */
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dpy = wl_display_create();
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eventloop = wl_display_get_event_loop(dpy);
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for (i = 0; i < LENGTH(sighandler); i++)
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sighandler[i] = wl_event_loop_add_signal(eventloop, sig[i], handlesig, NULL);
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/* The backend is a wlroots feature which abstracts the underlying input and
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* output hardware. The autocreate option will choose the most suitable
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@ -2155,8 +2164,8 @@ setup(void)
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/* Initialize the scene graph used to lay out windows */
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scene = wlr_scene_create();
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for (layer = 0; layer < NUM_LAYERS; layer++)
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layers[layer] = wlr_scene_tree_create(&scene->tree);
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for (i = 0; i < NUM_LAYERS; i++)
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layers[i] = wlr_scene_tree_create(&scene->tree);
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/* Create a renderer with the default implementation */
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if (!(drw = wlr_renderer_autocreate(backend)))
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@ -2308,28 +2317,6 @@ setup(void)
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#endif
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}
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void
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sigchld(int unused)
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{
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#ifdef XWAYLAND
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siginfo_t in;
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/* We should be able to remove this function in favor of a simple
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* struct sigaction sa = {.sa_handler = SIG_IGN};
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* sigaction(SIGCHLD, &sa, NULL);
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* but the Xwayland implementation in wlroots currently prevents us from
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* setting our own disposition for SIGCHLD.
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*/
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/* WNOWAIT leaves the child in a waitable state, in case this is the
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* XWayland process
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*/
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while (!waitid(P_ALL, 0, &in, WEXITED|WNOHANG|WNOWAIT) && in.si_pid
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&& (!xwayland || in.si_pid != xwayland->server->pid))
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waitpid(in.si_pid, NULL, 0);
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#else
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while (waitpid(-1, NULL, WNOHANG) > 0);
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#endif
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}
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void
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spawn(const Arg *arg)
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{
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