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https://github.com/swaywm/sway.git
synced 2025-11-02 09:01:40 -05:00
eb527ac01a
If there are no arguments or invalid arguments given, swaynag will free `swaynag.details.button_details` under the `cleanup` label in main. It then called `swaynag_destroy`, which would attempt to free it again. Since `swaynag.details.button_details` is either freed on line 106 of main (when there is no detailed message) or added to `swaynag.buttons` on line 103 of main, there is no reason to manually free it in `swaynag_destroy`. Although I cannot reproduce a double free on my system, for some reason, it should have actually resulted in a double free in all code paths.
464 lines
14 KiB
C
464 lines
14 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <stdlib.h>
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#include <assert.h>
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#include <sys/stat.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 "log.h"
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#include "list.h"
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#include "swaynag/render.h"
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#include "swaynag/swaynag.h"
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#include "swaynag/types.h"
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#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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static void nop() {
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// Intentionally left blank
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}
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static bool terminal_execute(char *terminal, char *command) {
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char fname[] = "/tmp/swaynagXXXXXX";
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FILE *tmp= fdopen(mkstemp(fname), "w");
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if (!tmp) {
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wlr_log(WLR_ERROR, "Failed to create temp script");
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return false;
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}
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wlr_log(WLR_DEBUG, "Created temp script: %s", fname);
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fprintf(tmp, "#!/bin/sh\nrm %s\n%s", fname, command);
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fclose(tmp);
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chmod(fname, S_IRUSR | S_IWUSR | S_IXUSR);
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char cmd[strlen(terminal) + strlen(" -e ") + strlen(fname) + 1];
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sprintf(cmd, "%s -e %s", terminal, fname);
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execl("/bin/sh", "/bin/sh", "-c", cmd, NULL);
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return true;
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}
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static void swaynag_button_execute(struct swaynag *swaynag,
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struct swaynag_button *button) {
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wlr_log(WLR_DEBUG, "Executing [%s]: %s", button->text, button->action);
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if (button->type == SWAYNAG_ACTION_DISMISS) {
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swaynag->run_display = false;
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} else if (button->type == SWAYNAG_ACTION_EXPAND) {
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swaynag->details.visible = !swaynag->details.visible;
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render_frame(swaynag);
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} else {
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if (fork() == 0) {
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// Child process. Will be used to prevent zombie processes
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setsid();
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if (fork() == 0) {
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// Child of the child. Will be reparented to the init process
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char *terminal = getenv("TERMINAL");
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if (button->terminal && terminal && strlen(terminal)) {
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wlr_log(WLR_DEBUG, "Found $TERMINAL: %s", terminal);
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if (!terminal_execute(terminal, button->action)) {
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swaynag_destroy(swaynag);
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exit(EXIT_FAILURE);
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}
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} else {
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if (button->terminal) {
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wlr_log(WLR_DEBUG,
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"$TERMINAL not found. Running directly");
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}
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execl("/bin/sh", "/bin/sh", "-c", button->action, NULL);
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}
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}
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exit(EXIT_SUCCESS);
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}
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}
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wait(0);
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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 swaynag *swaynag = data;
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swaynag->width = width;
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swaynag->height = height;
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zwlr_layer_surface_v1_ack_configure(surface, serial);
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render_frame(swaynag);
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}
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static void layer_surface_closed(void *data,
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struct zwlr_layer_surface_v1 *surface) {
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struct swaynag *swaynag = data;
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swaynag_destroy(swaynag);
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}
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static 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 surface_enter(void *data, struct wl_surface *surface,
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struct wl_output *output) {
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struct swaynag *swaynag = data;
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struct swaynag_output *swaynag_output;
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wl_list_for_each(swaynag_output, &swaynag->outputs, link) {
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if (swaynag_output->wl_output == output) {
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wlr_log(WLR_DEBUG, "Surface enter on output %s",
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swaynag_output->name);
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swaynag->output = swaynag_output;
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swaynag->scale = swaynag->output->scale;
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render_frame(swaynag);
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break;
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}
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};
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}
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static struct wl_surface_listener surface_listener = {
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.enter = surface_enter,
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.leave = nop,
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};
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static void update_cursor(struct swaynag *swaynag) {
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struct swaynag_pointer *pointer = &swaynag->pointer;
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if (swaynag->pointer.cursor_theme) {
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wl_cursor_theme_destroy(swaynag->pointer.cursor_theme);
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}
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pointer->cursor_theme = wl_cursor_theme_load(NULL, 24 * swaynag->scale,
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swaynag->shm);
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struct wl_cursor *cursor =
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wl_cursor_theme_get_cursor(pointer->cursor_theme, "left_ptr");
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pointer->cursor_image = cursor->images[0];
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wl_surface_set_buffer_scale(pointer->cursor_surface,
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swaynag->scale);
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wl_surface_attach(pointer->cursor_surface,
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wl_cursor_image_get_buffer(pointer->cursor_image), 0, 0);
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wl_pointer_set_cursor(pointer->pointer, pointer->serial,
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pointer->cursor_surface,
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pointer->cursor_image->hotspot_x / swaynag->scale,
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pointer->cursor_image->hotspot_y / swaynag->scale);
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wl_surface_damage_buffer(pointer->cursor_surface, 0, 0,
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INT32_MAX, INT32_MAX);
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wl_surface_commit(pointer->cursor_surface);
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}
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static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
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uint32_t serial, struct wl_surface *surface,
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wl_fixed_t surface_x, wl_fixed_t surface_y) {
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struct swaynag *swaynag = data;
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struct swaynag_pointer *pointer = &swaynag->pointer;
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pointer->serial = serial;
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update_cursor(swaynag);
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}
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static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
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uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
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struct swaynag *swaynag = data;
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swaynag->pointer.x = wl_fixed_to_int(surface_x);
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swaynag->pointer.y = wl_fixed_to_int(surface_y);
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}
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static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
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uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
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struct swaynag *swaynag = data;
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if (state != WL_POINTER_BUTTON_STATE_PRESSED) {
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return;
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}
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double x = swaynag->pointer.x * swaynag->scale;
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double y = swaynag->pointer.y * swaynag->scale;
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for (int i = 0; i < swaynag->buttons->length; i++) {
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struct swaynag_button *nagbutton = swaynag->buttons->items[i];
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if (x >= nagbutton->x
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&& y >= nagbutton->y
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&& x < nagbutton->x + nagbutton->width
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&& y < nagbutton->y + nagbutton->height) {
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swaynag_button_execute(swaynag, nagbutton);
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return;
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}
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}
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if (swaynag->details.visible &&
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swaynag->details.total_lines != swaynag->details.visible_lines) {
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struct swaynag_button button_up = swaynag->details.button_up;
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if (x >= button_up.x
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&& y >= button_up.y
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&& x < button_up.x + button_up.width
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&& y < button_up.y + button_up.height
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&& swaynag->details.offset > 0) {
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swaynag->details.offset--;
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render_frame(swaynag);
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return;
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}
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struct swaynag_button button_down = swaynag->details.button_down;
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int bot = swaynag->details.total_lines;
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bot -= swaynag->details.visible_lines;
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if (x >= button_down.x
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&& y >= button_down.y
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&& x < button_down.x + button_down.width
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&& y < button_down.y + button_down.height
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&& swaynag->details.offset < bot) {
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swaynag->details.offset++;
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render_frame(swaynag);
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return;
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}
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}
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}
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static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
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uint32_t time, uint32_t axis, wl_fixed_t value) {
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struct swaynag *swaynag = data;
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if (!swaynag->details.visible
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|| swaynag->pointer.x < swaynag->details.x
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|| swaynag->pointer.y < swaynag->details.y
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|| swaynag->pointer.x >= swaynag->details.x + swaynag->details.width
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|| swaynag->pointer.y >= swaynag->details.y + swaynag->details.height
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|| swaynag->details.total_lines == swaynag->details.visible_lines) {
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return;
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}
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int direction = wl_fixed_to_int(value);
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int bot = swaynag->details.total_lines - swaynag->details.visible_lines;
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if (direction < 0 && swaynag->details.offset > 0) {
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swaynag->details.offset--;
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} else if (direction > 0 && swaynag->details.offset < bot) {
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swaynag->details.offset++;
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}
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render_frame(swaynag);
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}
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static struct wl_pointer_listener pointer_listener = {
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.enter = wl_pointer_enter,
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.leave = nop,
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.motion = wl_pointer_motion,
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.button = wl_pointer_button,
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.axis = wl_pointer_axis,
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.frame = nop,
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.axis_source = nop,
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.axis_stop = nop,
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.axis_discrete = nop,
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};
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static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
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enum wl_seat_capability caps) {
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struct swaynag *swaynag = data;
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if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
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swaynag->pointer.pointer = wl_seat_get_pointer(wl_seat);
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wl_pointer_add_listener(swaynag->pointer.pointer, &pointer_listener,
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swaynag);
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}
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}
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const struct wl_seat_listener seat_listener = {
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.capabilities = seat_handle_capabilities,
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.name = nop,
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};
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static void output_scale(void *data, struct wl_output *output,
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int32_t factor) {
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struct swaynag_output *swaynag_output = data;
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swaynag_output->scale = factor;
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if (swaynag_output->swaynag->output == swaynag_output) {
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swaynag_output->swaynag->scale = swaynag_output->scale;
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update_cursor(swaynag_output->swaynag);
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render_frame(swaynag_output->swaynag);
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}
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}
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static struct wl_output_listener output_listener = {
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.geometry = nop,
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.mode = nop,
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.done = nop,
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.scale = output_scale,
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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 swaynag_output *swaynag_output = data;
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char *outname = swaynag_output->swaynag->type->output;
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wlr_log(WLR_DEBUG, "Checking against output %s for %s", name, outname);
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if (!swaynag_output->swaynag->output && outname && name
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&& strcmp(outname, name) == 0) {
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wlr_log(WLR_DEBUG, "Using output %s", name);
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swaynag_output->swaynag->output = swaynag_output;
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}
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swaynag_output->name = strdup(name);
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zxdg_output_v1_destroy(xdg_output);
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swaynag_output->swaynag->querying_outputs--;
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}
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static struct zxdg_output_v1_listener xdg_output_listener = {
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.logical_position = nop,
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.logical_size = nop,
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.done = nop,
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.name = xdg_output_handle_name,
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.description = nop,
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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 swaynag *swaynag = data;
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if (strcmp(interface, wl_compositor_interface.name) == 0) {
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swaynag->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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swaynag->seat = wl_registry_bind(registry, name, &wl_seat_interface, 1);
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wl_seat_add_listener(swaynag->seat, &seat_listener, swaynag);
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} else if (strcmp(interface, wl_shm_interface.name) == 0) {
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swaynag->shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
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} else if (strcmp(interface, wl_output_interface.name) == 0) {
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if (!swaynag->output && swaynag->xdg_output_manager) {
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swaynag->querying_outputs++;
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struct swaynag_output *output =
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calloc(1, sizeof(struct swaynag_output));
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output->wl_output = wl_registry_bind(registry, name,
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&wl_output_interface, 3);
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output->wl_name = name;
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output->scale = 1;
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output->swaynag = swaynag;
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wl_list_insert(&swaynag->outputs, &output->link);
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wl_output_add_listener(output->wl_output,
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&output_listener, output);
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struct zxdg_output_v1 *xdg_output;
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xdg_output = zxdg_output_manager_v1_get_xdg_output(
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swaynag->xdg_output_manager, output->wl_output);
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zxdg_output_v1_add_listener(xdg_output,
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&xdg_output_listener, output);
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}
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} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
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swaynag->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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&& version >= ZXDG_OUTPUT_V1_NAME_SINCE_VERSION) {
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swaynag->xdg_output_manager = wl_registry_bind(registry, name,
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&zxdg_output_manager_v1_interface,
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ZXDG_OUTPUT_V1_NAME_SINCE_VERSION);
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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 swaynag *swaynag = data;
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if (swaynag->output->wl_name == name) {
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swaynag->run_display = false;
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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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void swaynag_setup(struct swaynag *swaynag) {
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swaynag->display = wl_display_connect(NULL);
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if (!swaynag->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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swaynag->scale = 1;
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wl_list_init(&swaynag->outputs);
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struct wl_registry *registry = wl_display_get_registry(swaynag->display);
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wl_registry_add_listener(registry, ®istry_listener, swaynag);
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wl_display_roundtrip(swaynag->display);
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assert(swaynag->compositor && swaynag->layer_shell && swaynag->shm);
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while (swaynag->querying_outputs > 0) {
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wl_display_roundtrip(swaynag->display);
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}
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if (!swaynag->output && swaynag->type->output) {
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wlr_log(WLR_ERROR, "Output '%s' not found", swaynag->type->output);
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swaynag_destroy(swaynag);
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exit(EXIT_FAILURE);
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}
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struct swaynag_pointer *pointer = &swaynag->pointer;
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pointer->cursor_surface = wl_compositor_create_surface(swaynag->compositor);
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assert(pointer->cursor_surface);
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swaynag->surface = wl_compositor_create_surface(swaynag->compositor);
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assert(swaynag->surface);
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wl_surface_add_listener(swaynag->surface, &surface_listener, swaynag);
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swaynag->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
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swaynag->layer_shell, swaynag->surface,
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swaynag->output ? swaynag->output->wl_output : NULL,
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ZWLR_LAYER_SHELL_V1_LAYER_TOP, "swaynag");
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assert(swaynag->layer_surface);
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zwlr_layer_surface_v1_add_listener(swaynag->layer_surface,
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&layer_surface_listener, swaynag);
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zwlr_layer_surface_v1_set_anchor(swaynag->layer_surface,
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swaynag->type->anchors);
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wl_registry_destroy(registry);
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}
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void swaynag_run(struct swaynag *swaynag) {
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swaynag->run_display = true;
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render_frame(swaynag);
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while (swaynag->run_display
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&& wl_display_dispatch(swaynag->display) != -1) {
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// This is intentionally left blank
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}
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if (swaynag->display) {
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wl_display_disconnect(swaynag->display);
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}
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}
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void swaynag_destroy(struct swaynag *swaynag) {
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swaynag->run_display = false;
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free(swaynag->message);
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for (int i = 0; i < swaynag->buttons->length; ++i) {
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struct swaynag_button *button = swaynag->buttons->items[i];
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free(button->text);
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free(button->action);
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free(button);
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}
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list_free(swaynag->buttons);
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free(swaynag->details.message);
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free(swaynag->details.button_up.text);
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free(swaynag->details.button_down.text);
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if (swaynag->type) {
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swaynag_type_free(swaynag->type);
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}
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if (swaynag->layer_surface) {
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zwlr_layer_surface_v1_destroy(swaynag->layer_surface);
|
|
}
|
|
|
|
if (swaynag->surface) {
|
|
wl_surface_destroy(swaynag->surface);
|
|
}
|
|
|
|
if (swaynag->pointer.cursor_theme) {
|
|
wl_cursor_theme_destroy(swaynag->pointer.cursor_theme);
|
|
}
|
|
|
|
if (&swaynag->buffers[0]) {
|
|
destroy_buffer(&swaynag->buffers[0]);
|
|
}
|
|
|
|
if (&swaynag->buffers[1]) {
|
|
destroy_buffer(&swaynag->buffers[1]);
|
|
}
|
|
|
|
if (swaynag->outputs.prev || swaynag->outputs.next) {
|
|
struct swaynag_output *output, *temp;
|
|
wl_list_for_each_safe(output, temp, &swaynag->outputs, link) {
|
|
wl_output_destroy(output->wl_output);
|
|
free(output->name);
|
|
wl_list_remove(&output->link);
|
|
free(output);
|
|
};
|
|
}
|
|
|
|
if (swaynag->compositor) {
|
|
wl_compositor_destroy(swaynag->compositor);
|
|
}
|
|
|
|
if (swaynag->shm) {
|
|
wl_shm_destroy(swaynag->shm);
|
|
}
|
|
}
|