mirror of
https://github.com/swaywm/sway.git
synced 2024-11-10 20:44:01 +01:00
f627cd77d6
Make the status command a process group leader and change the kill(2)
calls to target the new process group. Signals sent by swaybar will then
be received by both the status command and its children, if any. While
here, check the result of fork(2).
Without this, children spawned by the status command may not receive the
signals sent by swaybar. As a result, these children may be orphaned on
reload.
The issue could be shown by setting the bar to
bar {
status_command i3status | tee /tmp/i3status.out
}
which would leave orphaned processes for each reload of sway
$ ps o pid,ppid,cmd | grep i3status | grep -v grep
43633 43624 sh -c i3status | tee /tmp/i3status.out
43634 43633 i3status
43635 43633 tee /tmp/i3status.out
$ swaymsg reload
$ ps o pid,ppid,cmd | grep i3status | grep -v grep
43634 1 i3status
43635 1 tee /tmp/i3status.out
43801 43788 sh -c i3status | tee /tmp/i3status.out
43802 43801 i3status
43803 43801 tee /tmp/i3status.out
This fixes #5584.
556 lines
15 KiB
C
556 lines
15 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <wayland-client.h>
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#include <wayland-cursor.h>
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#include "config.h"
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#include "swaybar/bar.h"
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#include "swaybar/config.h"
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#include "swaybar/i3bar.h"
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#include "swaybar/input.h"
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#include "swaybar/ipc.h"
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#include "swaybar/status_line.h"
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#include "swaybar/render.h"
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#if HAVE_TRAY
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#include "swaybar/tray/tray.h"
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#endif
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#include "ipc-client.h"
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#include "list.h"
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#include "log.h"
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#include "loop.h"
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#include "pool-buffer.h"
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#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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#include "xdg-output-unstable-v1-client-protocol.h"
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void free_workspaces(struct wl_list *list) {
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struct swaybar_workspace *ws, *tmp;
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wl_list_for_each_safe(ws, tmp, list, link) {
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wl_list_remove(&ws->link);
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free(ws->name);
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free(ws->label);
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free(ws);
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}
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}
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static void swaybar_output_free(struct swaybar_output *output) {
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if (!output) {
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return;
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}
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sway_log(SWAY_DEBUG, "Removing output %s", output->name);
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if (output->layer_surface != NULL) {
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zwlr_layer_surface_v1_destroy(output->layer_surface);
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}
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if (output->surface != NULL) {
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wl_surface_destroy(output->surface);
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}
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if (output->input_region != NULL) {
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wl_region_destroy(output->input_region);
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}
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zxdg_output_v1_destroy(output->xdg_output);
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wl_output_destroy(output->output);
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destroy_buffer(&output->buffers[0]);
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destroy_buffer(&output->buffers[1]);
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free_hotspots(&output->hotspots);
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free_workspaces(&output->workspaces);
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wl_list_remove(&output->link);
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free(output->name);
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free(output->identifier);
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free(output);
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}
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static void set_output_dirty(struct swaybar_output *output) {
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if (output->frame_scheduled) {
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output->dirty = true;
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} else if (output->surface) {
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render_frame(output);
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}
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}
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static void layer_surface_configure(void *data,
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struct zwlr_layer_surface_v1 *surface,
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uint32_t serial, uint32_t width, uint32_t height) {
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struct swaybar_output *output = data;
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output->width = width;
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output->height = height;
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zwlr_layer_surface_v1_ack_configure(surface, serial);
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set_output_dirty(output);
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}
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static void layer_surface_closed(void *_output,
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struct zwlr_layer_surface_v1 *surface) {
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struct swaybar_output *output = _output;
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swaybar_output_free(output);
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}
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static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
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.configure = layer_surface_configure,
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.closed = layer_surface_closed,
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};
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static void add_layer_surface(struct swaybar_output *output) {
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if (output->layer_surface) {
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return;
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}
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struct swaybar *bar = output->bar;
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struct swaybar_config *config = bar->config;
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bool hidden = strcmp(config->mode, "hide") == 0;
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bool overlay = !hidden && strcmp(config->mode, "overlay") == 0;
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output->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
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bar->layer_shell, output->surface, output->output,
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hidden || overlay ? ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY :
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ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, "panel");
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assert(output->layer_surface);
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zwlr_layer_surface_v1_add_listener(output->layer_surface,
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&layer_surface_listener, output);
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if (overlay) {
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// Empty input region
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output->input_region = wl_compositor_create_region(bar->compositor);
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assert(output->input_region);
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wl_surface_set_input_region(output->surface, output->input_region);
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}
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zwlr_layer_surface_v1_set_anchor(output->layer_surface, config->position);
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if (hidden || overlay) {
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zwlr_layer_surface_v1_set_exclusive_zone(output->layer_surface, -1);
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}
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}
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void destroy_layer_surface(struct swaybar_output *output) {
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if (!output->layer_surface) {
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return;
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}
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zwlr_layer_surface_v1_destroy(output->layer_surface);
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wl_surface_attach(output->surface, NULL, 0, 0); // detach buffer
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output->layer_surface = NULL;
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output->width = 0;
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output->frame_scheduled = false;
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}
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void set_bar_dirty(struct swaybar *bar) {
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struct swaybar_output *output;
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wl_list_for_each(output, &bar->outputs, link) {
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set_output_dirty(output);
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}
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}
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bool determine_bar_visibility(struct swaybar *bar, bool moving_layer) {
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struct swaybar_config *config = bar->config;
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bool visible = !(strcmp(config->mode, "invisible") == 0 ||
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(strcmp(config->mode, config->hidden_state) == 0 // both "hide"
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&& !bar->visible_by_modifier && !bar->visible_by_urgency
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&& !bar->visible_by_mode));
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// Create/destroy layer surfaces as needed
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struct swaybar_output *output;
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wl_list_for_each(output, &bar->outputs, link) {
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// When moving to a different layer, we need to destroy and re-create
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// the layer surface
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if (!visible || moving_layer) {
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destroy_layer_surface(output);
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}
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if (visible) {
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add_layer_surface(output);
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}
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}
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set_bar_dirty(bar);
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if (visible != bar->visible) {
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bar->visible = visible;
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if (bar->status) {
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sway_log(SWAY_DEBUG, "Sending %s signal to status command",
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visible ? "cont" : "stop");
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kill(-bar->status->pid, visible ?
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bar->status->cont_signal : bar->status->stop_signal);
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}
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}
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return visible;
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}
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static bool bar_uses_output(struct swaybar_output *output) {
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if (wl_list_empty(&output->bar->config->outputs)) {
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return true;
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}
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char *identifier = output->identifier;
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struct config_output *coutput;
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wl_list_for_each(coutput, &output->bar->config->outputs, link) {
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if (strcmp(coutput->name, output->name) == 0 ||
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(identifier && strcmp(coutput->name, identifier) == 0)) {
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return true;
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}
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}
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return false;
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}
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static void output_geometry(void *data, struct wl_output *wl_output, int32_t x,
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int32_t y, int32_t width_mm, int32_t height_mm, int32_t subpixel,
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const char *make, const char *model, int32_t transform) {
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struct swaybar_output *output = data;
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output->subpixel = subpixel;
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}
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static void output_mode(void *data, struct wl_output *wl_output, uint32_t flags,
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int32_t width, int32_t height, int32_t refresh) {
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// Who cares
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}
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static void output_done(void *data, struct wl_output *wl_output) {
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struct swaybar_output *output = data;
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set_output_dirty(output);
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}
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static void output_scale(void *data, struct wl_output *wl_output,
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int32_t factor) {
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struct swaybar_output *output = data;
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output->scale = factor;
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bool render = false;
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struct swaybar_seat *seat;
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wl_list_for_each(seat, &output->bar->seats, link) {
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if (output == seat->pointer.current) {
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update_cursor(seat);
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render = true;
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}
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};
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if (render) {
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render_frame(output);
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}
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}
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static const struct wl_output_listener output_listener = {
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.geometry = output_geometry,
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.mode = output_mode,
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.done = output_done,
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.scale = output_scale,
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};
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static void xdg_output_handle_logical_position(void *data,
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struct zxdg_output_v1 *xdg_output, int32_t x, int32_t y) {
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struct swaybar_output *output = data;
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output->output_x = x;
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output->output_y = y;
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}
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static void xdg_output_handle_logical_size(void *data,
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struct zxdg_output_v1 *xdg_output, int32_t width, int32_t height) {
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struct swaybar_output *output = data;
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output->output_height = height;
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output->output_width = width;
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}
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static void xdg_output_handle_done(void *data,
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struct zxdg_output_v1 *xdg_output) {
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struct swaybar_output *output = data;
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struct swaybar *bar = output->bar;
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if (!wl_list_empty(&output->link)) {
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return;
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}
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assert(output->name != NULL);
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if (!bar_uses_output(output)) {
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wl_list_remove(&output->link);
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wl_list_insert(&bar->unused_outputs, &output->link);
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return;
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}
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wl_list_remove(&output->link);
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wl_list_insert(&bar->outputs, &output->link);
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output->surface = wl_compositor_create_surface(bar->compositor);
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assert(output->surface);
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determine_bar_visibility(bar, false);
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if (bar->running && bar->config->workspace_buttons) {
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ipc_get_workspaces(bar);
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}
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}
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static void xdg_output_handle_name(void *data,
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struct zxdg_output_v1 *xdg_output, const char *name) {
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struct swaybar_output *output = data;
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free(output->name);
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output->name = strdup(name);
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}
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static void xdg_output_handle_description(void *data,
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struct zxdg_output_v1 *xdg_output, const char *description) {
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// wlroots currently sets the description to `make model serial (name)`
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// If this changes in the future, this will need to be modified.
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struct swaybar_output *output = data;
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free(output->identifier);
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output->identifier = NULL;
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char *paren = strrchr(description, '(');
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if (paren) {
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size_t length = paren - description;
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output->identifier = malloc(length);
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if (!output->identifier) {
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sway_log(SWAY_ERROR, "Failed to allocate output identifier");
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return;
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}
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strncpy(output->identifier, description, length);
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output->identifier[length - 1] = '\0';
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}
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}
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static const struct zxdg_output_v1_listener xdg_output_listener = {
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.logical_position = xdg_output_handle_logical_position,
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.logical_size = xdg_output_handle_logical_size,
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.done = xdg_output_handle_done,
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.name = xdg_output_handle_name,
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.description = xdg_output_handle_description,
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};
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static void add_xdg_output(struct swaybar_output *output) {
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if (output->xdg_output != NULL) {
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return;
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}
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assert(output->bar->xdg_output_manager != NULL);
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output->xdg_output = zxdg_output_manager_v1_get_xdg_output(
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output->bar->xdg_output_manager, output->output);
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zxdg_output_v1_add_listener(output->xdg_output, &xdg_output_listener,
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output);
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}
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static void handle_global(void *data, struct wl_registry *registry,
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uint32_t name, const char *interface, uint32_t version) {
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struct swaybar *bar = data;
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if (strcmp(interface, wl_compositor_interface.name) == 0) {
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bar->compositor = wl_registry_bind(registry, name,
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&wl_compositor_interface, 4);
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} else if (strcmp(interface, wl_seat_interface.name) == 0) {
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struct swaybar_seat *seat = calloc(1, sizeof(struct swaybar_seat));
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if (!seat) {
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sway_abort("Failed to allocate swaybar_seat");
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return;
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}
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seat->bar = bar;
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seat->wl_name = name;
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seat->wl_seat = wl_registry_bind(registry, name, &wl_seat_interface, 5);
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wl_seat_add_listener(seat->wl_seat, &seat_listener, seat);
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wl_list_insert(&bar->seats, &seat->link);
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} else if (strcmp(interface, wl_shm_interface.name) == 0) {
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bar->shm = wl_registry_bind(registry, name,
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&wl_shm_interface, 1);
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} else if (strcmp(interface, wl_output_interface.name) == 0) {
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struct swaybar_output *output =
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calloc(1, sizeof(struct swaybar_output));
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output->bar = bar;
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output->output = wl_registry_bind(registry, name,
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&wl_output_interface, 3);
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wl_output_add_listener(output->output, &output_listener, output);
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output->scale = 1;
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output->wl_name = name;
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wl_list_init(&output->workspaces);
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wl_list_init(&output->hotspots);
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wl_list_init(&output->link);
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if (bar->xdg_output_manager != NULL) {
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add_xdg_output(output);
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}
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} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
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bar->layer_shell = wl_registry_bind(
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registry, name, &zwlr_layer_shell_v1_interface, 1);
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} else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
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bar->xdg_output_manager = wl_registry_bind(registry, name,
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&zxdg_output_manager_v1_interface, 2);
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}
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}
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static void handle_global_remove(void *data, struct wl_registry *registry,
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uint32_t name) {
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struct swaybar *bar = data;
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struct swaybar_output *output, *tmp;
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wl_list_for_each_safe(output, tmp, &bar->outputs, link) {
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if (output->wl_name == name) {
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swaybar_output_free(output);
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return;
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}
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}
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wl_list_for_each_safe(output, tmp, &bar->unused_outputs, link) {
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if (output->wl_name == name) {
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swaybar_output_free(output);
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return;
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}
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}
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struct swaybar_seat *seat, *tmp_seat;
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wl_list_for_each_safe(seat, tmp_seat, &bar->seats, link) {
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if (seat->wl_name == name) {
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swaybar_seat_free(seat);
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return;
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}
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}
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}
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static const struct wl_registry_listener registry_listener = {
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.global = handle_global,
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.global_remove = handle_global_remove,
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};
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bool bar_setup(struct swaybar *bar, const char *socket_path) {
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bar->visible = true;
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bar->config = init_config();
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wl_list_init(&bar->outputs);
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wl_list_init(&bar->unused_outputs);
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wl_list_init(&bar->seats);
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bar->eventloop = loop_create();
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bar->ipc_socketfd = ipc_open_socket(socket_path);
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bar->ipc_event_socketfd = ipc_open_socket(socket_path);
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if (!ipc_initialize(bar)) {
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return false;
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}
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bar->display = wl_display_connect(NULL);
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if (!bar->display) {
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sway_abort("Unable to connect to the compositor. "
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"If your compositor is running, check or set the "
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"WAYLAND_DISPLAY environment variable.");
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}
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struct wl_registry *registry = wl_display_get_registry(bar->display);
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wl_registry_add_listener(registry, ®istry_listener, bar);
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wl_display_roundtrip(bar->display);
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assert(bar->compositor && bar->layer_shell && bar->shm &&
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bar->xdg_output_manager);
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// Second roundtrip for xdg-output
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wl_display_roundtrip(bar->display);
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struct swaybar_seat *seat;
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wl_list_for_each(seat, &bar->seats, link) {
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struct swaybar_pointer *pointer = &seat->pointer;
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if (!pointer) {
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continue;
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}
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pointer->cursor_surface =
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wl_compositor_create_surface(bar->compositor);
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assert(pointer->cursor_surface);
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}
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if (bar->config->status_command) {
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bar->status = status_line_init(bar->config->status_command);
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bar->status->bar = bar;
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}
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#if HAVE_TRAY
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if (!bar->config->tray_hidden) {
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bar->tray = create_tray(bar);
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}
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#endif
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if (bar->config->workspace_buttons) {
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ipc_get_workspaces(bar);
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}
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determine_bar_visibility(bar, false);
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return true;
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}
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static void display_in(int fd, short mask, void *data) {
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struct swaybar *bar = data;
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if (mask & (POLLHUP | POLLERR)) {
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if (mask & POLLERR) {
|
|
sway_log(SWAY_ERROR, "Wayland display poll error");
|
|
}
|
|
bar->running = false;
|
|
return;
|
|
}
|
|
if (wl_display_dispatch(bar->display) == -1) {
|
|
sway_log(SWAY_ERROR, "wl_display_dispatch failed");
|
|
bar->running = false;
|
|
}
|
|
}
|
|
|
|
static void ipc_in(int fd, short mask, void *data) {
|
|
struct swaybar *bar = data;
|
|
if (mask & (POLLHUP | POLLERR)) {
|
|
if (mask & POLLERR) {
|
|
sway_log(SWAY_ERROR, "IPC poll error");
|
|
}
|
|
bar->running = false;
|
|
return;
|
|
}
|
|
if (handle_ipc_readable(bar)) {
|
|
set_bar_dirty(bar);
|
|
}
|
|
}
|
|
|
|
void status_in(int fd, short mask, void *data) {
|
|
struct swaybar *bar = data;
|
|
if (mask & (POLLHUP | POLLERR)) {
|
|
status_error(bar->status, "[error reading from status command]");
|
|
set_bar_dirty(bar);
|
|
loop_remove_fd(bar->eventloop, fd);
|
|
} else if (status_handle_readable(bar->status)) {
|
|
set_bar_dirty(bar);
|
|
}
|
|
}
|
|
|
|
void bar_run(struct swaybar *bar) {
|
|
loop_add_fd(bar->eventloop, wl_display_get_fd(bar->display), POLLIN,
|
|
display_in, bar);
|
|
loop_add_fd(bar->eventloop, bar->ipc_event_socketfd, POLLIN, ipc_in, bar);
|
|
if (bar->status) {
|
|
loop_add_fd(bar->eventloop, bar->status->read_fd, POLLIN,
|
|
status_in, bar);
|
|
}
|
|
#if HAVE_TRAY
|
|
if (bar->tray) {
|
|
loop_add_fd(bar->eventloop, bar->tray->fd, POLLIN, tray_in, bar->tray->bus);
|
|
}
|
|
#endif
|
|
while (bar->running) {
|
|
errno = 0;
|
|
if (wl_display_flush(bar->display) == -1 && errno != EAGAIN) {
|
|
break;
|
|
}
|
|
loop_poll(bar->eventloop);
|
|
}
|
|
}
|
|
|
|
static void free_outputs(struct wl_list *list) {
|
|
struct swaybar_output *output, *tmp;
|
|
wl_list_for_each_safe(output, tmp, list, link) {
|
|
swaybar_output_free(output);
|
|
}
|
|
}
|
|
|
|
static void free_seats(struct wl_list *list) {
|
|
struct swaybar_seat *seat, *tmp;
|
|
wl_list_for_each_safe(seat, tmp, list, link) {
|
|
swaybar_seat_free(seat);
|
|
}
|
|
}
|
|
|
|
void bar_teardown(struct swaybar *bar) {
|
|
#if HAVE_TRAY
|
|
destroy_tray(bar->tray);
|
|
#endif
|
|
free_outputs(&bar->outputs);
|
|
free_outputs(&bar->unused_outputs);
|
|
free_seats(&bar->seats);
|
|
if (bar->config) {
|
|
free_config(bar->config);
|
|
}
|
|
close(bar->ipc_event_socketfd);
|
|
close(bar->ipc_socketfd);
|
|
if (bar->status) {
|
|
status_line_free(bar->status);
|
|
}
|
|
free(bar->id);
|
|
free(bar->mode);
|
|
}
|