mirror of
https://github.com/swaywm/sway.git
synced 2026-04-22 06:46:27 -04:00
edcdb5552d
The size of IPC data is stored in an unsigned 32 bit data type within
the IPC message header. In order to terminate the received data with a
nul byte, one additional byte is allocated.
It is not checked if the transmitted size is 2^32 - 1. Adding one more
byte would overflow and lead to 0 byte allocation.
On 64 bit systems, the recv call with 2^32 - 1 does not fail instantly
but reads data from the server into unallocated memory.
Prevent override of unallocated memory by aborting communication.
Proof of Concept Python server (use 64 bit address sanitized client):
```
import os
import socket
os.remove('/tmp/sway-poc.socket')
server = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
server.bind('/tmp/sway-poc.socket')
server.listen(1)
print('waiting for client')
(client, address) = server.accept()
client.send(b'\x69\x33\x2D\x69\x70\x63\xFF\xFF\xFF\xFF\x00\x00\x00\x00\xFF\xFF\xFF\xFF\xFF')
input('sent reply, press enter')
client.close()
```
608 lines
19 KiB
C
608 lines
19 KiB
C
#define _POSIX_C_SOURCE 200809
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#include <limits.h>
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#include <poll.h>
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include <json.h>
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#include "swaybar/config.h"
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#include "swaybar/ipc.h"
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#include "swaybar/status_line.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 "config.h"
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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 "util.h"
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void ipc_send_workspace_command(struct swaybar *bar, const char *ws) {
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size_t size = strlen("workspace \"\"") + strlen(ws);
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for (size_t i = 0; i < strlen(ws); ++i) {
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if (ws[i] == '"' || ws[i] == '\\') {
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++size;
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}
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}
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char *command = malloc(size + 1);
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if (!command) {
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return;
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}
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strcpy(command, "workspace \"");
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strcpy(&command[size - 1], "\"");
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for (size_t i = 0, d = strlen("workspace \""); i < strlen(ws); ++i) {
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if (ws[i] == '"' || ws[i] == '\\') {
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command[d++] = '\\';
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}
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command[d++] = ws[i];
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}
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free(ipc_single_command(bar->ipc_socketfd, IPC_COMMAND, command, &size));
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free(command);
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}
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char *parse_font(const char *font) {
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char *new_font = NULL;
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if (strncmp("pango:", font, 6) == 0) {
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font += 6;
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}
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new_font = strdup(font);
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return new_font;
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}
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static void ipc_parse_colors(
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struct swaybar_config *config, json_object *colors) {
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struct {
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const char *name;
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uint32_t *color;
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} properties[] = {
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{ "background", &config->colors.background },
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{ "statusline", &config->colors.statusline },
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{ "separator", &config->colors.separator },
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{ "focused_background", &config->colors.focused_background },
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{ "focused_statusline", &config->colors.focused_statusline },
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{ "focused_separator", &config->colors.focused_separator },
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{ "focused_workspace_border", &config->colors.focused_workspace.border },
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{ "focused_workspace_bg", &config->colors.focused_workspace.background },
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{ "focused_workspace_text", &config->colors.focused_workspace.text },
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{ "active_workspace_border", &config->colors.active_workspace.border },
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{ "active_workspace_bg", &config->colors.active_workspace.background },
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{ "active_workspace_text", &config->colors.active_workspace.text },
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{ "inactive_workspace_border", &config->colors.inactive_workspace.border },
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{ "inactive_workspace_bg", &config->colors.inactive_workspace.background },
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{ "inactive_workspace_text", &config->colors.inactive_workspace.text },
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{ "urgent_workspace_border", &config->colors.urgent_workspace.border },
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{ "urgent_workspace_bg", &config->colors.urgent_workspace.background },
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{ "urgent_workspace_text", &config->colors.urgent_workspace.text },
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{ "binding_mode_border", &config->colors.binding_mode.border },
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{ "binding_mode_bg", &config->colors.binding_mode.background },
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{ "binding_mode_text", &config->colors.binding_mode.text },
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};
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for (size_t i = 0; i < sizeof(properties) / sizeof(properties[i]); i++) {
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json_object *object;
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if (json_object_object_get_ex(colors, properties[i].name, &object)) {
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const char *hexstring = json_object_get_string(object);
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if (!parse_color(hexstring, properties[i].color)) {
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sway_log(SWAY_ERROR, "Ignoring invalid %s: %s",
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properties[i].name, hexstring);
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}
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}
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}
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}
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static bool ipc_parse_config(
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struct swaybar_config *config, const char *payload) {
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json_object *bar_config = json_tokener_parse(payload);
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json_object *success;
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if (json_object_object_get_ex(bar_config, "success", &success)
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&& !json_object_get_boolean(success)) {
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sway_log(SWAY_ERROR, "No bar with that ID. Use 'swaymsg -t "
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"get_bar_config' to get the available bar configs.");
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json_object_put(bar_config);
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return false;
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}
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json_object *bar_height = json_object_object_get(bar_config, "bar_height");
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if (bar_height) {
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config->height = json_object_get_int(bar_height);
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}
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json_object *binding_mode_indicator =
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json_object_object_get(bar_config, "binding_mode_indicator");
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if (binding_mode_indicator) {
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config->binding_mode_indicator =
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json_object_get_boolean(binding_mode_indicator);
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}
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json_object *bindings = json_object_object_get(bar_config, "bindings");
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while (config->bindings->length) {
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struct swaybar_binding *binding = config->bindings->items[0];
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list_del(config->bindings, 0);
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free_binding(binding);
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}
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if (bindings) {
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int length = json_object_array_length(bindings);
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for (int i = 0; i < length; ++i) {
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json_object *bindobj = json_object_array_get_idx(bindings, i);
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struct swaybar_binding *binding =
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calloc(1, sizeof(struct swaybar_binding));
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binding->button = json_object_get_int(
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json_object_object_get(bindobj, "event_code"));
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binding->command = strdup(json_object_get_string(
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json_object_object_get(bindobj, "command")));
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binding->release = json_object_get_boolean(
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json_object_object_get(bindobj, "release"));
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list_add(config->bindings, binding);
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}
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}
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json_object *colors = json_object_object_get(bar_config, "colors");
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if (colors) {
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ipc_parse_colors(config, colors);
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}
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json_object *font = json_object_object_get(bar_config, "font");
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if (font) {
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free(config->font);
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config->font = parse_font(json_object_get_string(font));
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}
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json_object *gaps = json_object_object_get(bar_config, "gaps");
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if (gaps) {
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json_object *top = json_object_object_get(gaps, "top");
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if (top) {
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config->gaps.top = json_object_get_int(top);
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}
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json_object *right = json_object_object_get(gaps, "right");
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if (right) {
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config->gaps.right = json_object_get_int(right);
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}
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json_object *bottom = json_object_object_get(gaps, "bottom");
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if (bottom) {
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config->gaps.bottom = json_object_get_int(bottom);
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}
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json_object *left = json_object_object_get(gaps, "left");
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if (left) {
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config->gaps.left = json_object_get_int(left);
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}
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}
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json_object *hidden_state =
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json_object_object_get(bar_config, "hidden_state");
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if (hidden_state) {
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free(config->hidden_state);
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config->hidden_state = strdup(json_object_get_string(hidden_state));
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}
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json_object *mode = json_object_object_get(bar_config, "mode");
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if (mode) {
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free(config->mode);
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config->mode = strdup(json_object_get_string(mode));
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}
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json_object *outputs = json_object_object_get(bar_config, "outputs");
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struct config_output *output, *tmp;
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wl_list_for_each_safe(output, tmp, &config->outputs, link) {
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wl_list_remove(&output->link);
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free(output->name);
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free(output);
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}
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if (outputs) {
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int length = json_object_array_length(outputs);
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for (int i = 0; i < length; ++i) {
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json_object *output = json_object_array_get_idx(outputs, i);
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const char *name = json_object_get_string(output);
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if (strcmp("*", name) == 0) {
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struct config_output *coutput, *tmp;
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wl_list_for_each_safe(coutput, tmp, &config->outputs, link) {
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wl_list_remove(&coutput->link);
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free(coutput->name);
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free(coutput);
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}
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break;
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}
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struct config_output *coutput = calloc(
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1, sizeof(struct config_output));
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coutput->name = strdup(name);
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wl_list_insert(&config->outputs, &coutput->link);
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}
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}
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json_object *pango_markup =
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json_object_object_get(bar_config, "pango_markup");
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if (pango_markup) {
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config->pango_markup = json_object_get_boolean(pango_markup);
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}
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json_object *position = json_object_object_get(bar_config, "position");
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if (position) {
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config->position = parse_position(json_object_get_string(position));
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}
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json_object *separator_symbol =
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json_object_object_get(bar_config, "separator_symbol");
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if (separator_symbol) {
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free(config->sep_symbol);
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config->sep_symbol = strdup(json_object_get_string(separator_symbol));
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}
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json_object *status_command =
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json_object_object_get(bar_config, "status_command");
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if (status_command) {
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const char *command = json_object_get_string(status_command);
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free(config->status_command);
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config->status_command = strdup(command);
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}
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json_object *status_edge_padding =
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json_object_object_get(bar_config, "status_edge_padding");
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if (status_edge_padding) {
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config->status_edge_padding = json_object_get_int(status_edge_padding);
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}
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json_object *status_padding =
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json_object_object_get(bar_config, "status_padding");
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if (status_padding) {
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config->status_padding = json_object_get_int(status_padding);
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}
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json_object *strip_workspace_name =
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json_object_object_get(bar_config, "strip_workspace_name");
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if (strip_workspace_name) {
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config->strip_workspace_name =
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json_object_get_boolean(strip_workspace_name);
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}
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json_object *strip_workspace_numbers =
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json_object_object_get(bar_config, "strip_workspace_numbers");
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if (strip_workspace_numbers) {
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config->strip_workspace_numbers =
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json_object_get_boolean(strip_workspace_numbers);
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}
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json_object *workspace_buttons =
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json_object_object_get(bar_config, "workspace_buttons");
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if (workspace_buttons) {
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config->workspace_buttons = json_object_get_boolean(workspace_buttons);
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}
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json_object *workspace_min_width =
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json_object_object_get(bar_config, "workspace_min_width");
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if (workspace_min_width) {
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config->workspace_min_width = json_object_get_int(workspace_min_width);
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}
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json_object *wrap_scroll = json_object_object_get(bar_config, "wrap_scroll");
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if (wrap_scroll) {
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config->wrap_scroll = json_object_get_boolean(wrap_scroll);
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}
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#if HAVE_TRAY
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json_object *tray_outputs, *tray_padding, *tray_bindings, *icon_theme;
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if (config->tray_outputs && config->tray_outputs->length) {
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list_free_items_and_destroy(config->tray_outputs);
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}
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if ((json_object_object_get_ex(bar_config, "tray_outputs", &tray_outputs))) {
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config->tray_outputs = create_list();
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int length = json_object_array_length(tray_outputs);
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for (int i = 0; i < length; ++i) {
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json_object *output= json_object_array_get_idx(tray_outputs, i);
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const char *name = json_object_get_string(output);
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if (strcmp(name, "none") == 0) {
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config->tray_hidden = true;
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list_free_items_and_destroy(config->tray_outputs);
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config->tray_outputs = create_list();
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break;
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}
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list_add(config->tray_outputs, strdup(name));
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}
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}
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if ((json_object_object_get_ex(bar_config, "tray_padding", &tray_padding))) {
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config->tray_padding = json_object_get_int(tray_padding);
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}
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struct tray_binding *tray_bind = NULL, *tmp_tray_bind = NULL;
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wl_list_for_each_safe(tray_bind, tmp_tray_bind, &config->tray_bindings,
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link) {
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wl_list_remove(&tray_bind->link);
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free_tray_binding(tray_bind);
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}
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if ((json_object_object_get_ex(bar_config, "tray_bindings", &tray_bindings))) {
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int length = json_object_array_length(tray_bindings);
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for (int i = 0; i < length; ++i) {
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json_object *bind = json_object_array_get_idx(tray_bindings, i);
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struct tray_binding *binding =
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calloc(1, sizeof(struct tray_binding));
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binding->button = json_object_get_int(
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json_object_object_get(bind, "event_code"));
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binding->command = strdup(json_object_get_string(
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json_object_object_get(bind, "command")));
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wl_list_insert(&config->tray_bindings, &binding->link);
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}
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}
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if ((json_object_object_get_ex(bar_config, "icon_theme", &icon_theme))) {
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config->icon_theme = strdup(json_object_get_string(icon_theme));
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}
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#endif
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json_object_put(bar_config);
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return true;
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}
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bool ipc_get_workspaces(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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free_workspaces(&output->workspaces);
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output->focused = false;
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}
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size_t len = 0;
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char *res = ipc_single_command(bar->ipc_socketfd,
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IPC_GET_WORKSPACES, NULL, &len);
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json_object *results = json_tokener_parse(res);
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if (!results) {
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free(res);
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return false;
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}
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bar->visible_by_urgency = false;
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size_t length = json_object_array_length(results);
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json_object *ws_json;
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json_object *num, *name, *visible, *focused, *out, *urgent;
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for (size_t i = 0; i < length; ++i) {
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ws_json = json_object_array_get_idx(results, i);
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json_object_object_get_ex(ws_json, "num", &num);
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json_object_object_get_ex(ws_json, "name", &name);
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json_object_object_get_ex(ws_json, "visible", &visible);
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json_object_object_get_ex(ws_json, "focused", &focused);
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json_object_object_get_ex(ws_json, "output", &out);
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json_object_object_get_ex(ws_json, "urgent", &urgent);
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wl_list_for_each(output, &bar->outputs, link) {
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const char *ws_output = json_object_get_string(out);
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if (ws_output != NULL && strcmp(ws_output, output->name) == 0) {
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struct swaybar_workspace *ws =
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calloc(1, sizeof(struct swaybar_workspace));
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ws->num = json_object_get_int(num);
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ws->name = strdup(json_object_get_string(name));
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ws->label = strdup(ws->name);
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// ws->num will be -1 if workspace name doesn't begin with int.
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if (ws->num != -1) {
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size_t len_offset = snprintf(NULL, 0, "%d", ws->num);
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if (bar->config->strip_workspace_name) {
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free(ws->label);
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ws->label = malloc(len_offset + 1);
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snprintf(ws->label, len_offset + 1, "%d", ws->num);
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} else if (bar->config->strip_workspace_numbers) {
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len_offset += ws->label[len_offset] == ':';
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if (ws->name[len_offset] != '\0') {
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free(ws->label);
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// Strip number prefix [1-?:] using len_offset.
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ws->label = strdup(ws->name + len_offset);
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}
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}
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}
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ws->visible = json_object_get_boolean(visible);
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ws->focused = json_object_get_boolean(focused);
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if (ws->focused) {
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output->focused = true;
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}
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ws->urgent = json_object_get_boolean(urgent);
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if (ws->urgent) {
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bar->visible_by_urgency = true;
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}
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wl_list_insert(output->workspaces.prev, &ws->link);
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}
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}
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}
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json_object_put(results);
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free(res);
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return determine_bar_visibility(bar, false);
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}
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void ipc_execute_binding(struct swaybar *bar, struct swaybar_binding *bind) {
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sway_log(SWAY_DEBUG, "Executing binding for button %u (release=%d): `%s`",
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bind->button, bind->release, bind->command);
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size_t len = strlen(bind->command);
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free(ipc_single_command(bar->ipc_socketfd,
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IPC_COMMAND, bind->command, &len));
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}
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bool ipc_initialize(struct swaybar *bar) {
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size_t len = strlen(bar->id);
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char *res = ipc_single_command(bar->ipc_socketfd,
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IPC_GET_BAR_CONFIG, bar->id, &len);
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if (!ipc_parse_config(bar->config, res)) {
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free(res);
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return false;
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}
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free(res);
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struct swaybar_config *config = bar->config;
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char subscribe[128]; // suitably large buffer
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len = snprintf(subscribe, 128,
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"[ \"barconfig_update\" , \"bar_state_update\" %s %s ]",
|
|
config->binding_mode_indicator ? ", \"mode\"" : "",
|
|
config->workspace_buttons ? ", \"workspace\"" : "");
|
|
free(ipc_single_command(bar->ipc_event_socketfd,
|
|
IPC_SUBSCRIBE, subscribe, &len));
|
|
return true;
|
|
}
|
|
|
|
static bool handle_bar_state_update(struct swaybar *bar, json_object *event) {
|
|
json_object *json_id;
|
|
json_object_object_get_ex(event, "id", &json_id);
|
|
const char *id = json_object_get_string(json_id);
|
|
if (strcmp(id, bar->id) != 0) {
|
|
return false;
|
|
}
|
|
|
|
json_object *visible_by_modifier;
|
|
json_object_object_get_ex(event, "visible_by_modifier", &visible_by_modifier);
|
|
bar->visible_by_modifier = json_object_get_boolean(visible_by_modifier);
|
|
if (bar->visible_by_modifier) {
|
|
// If the bar is visible by modifier, clear both visible by mode and
|
|
// urgency as modifier has precedence and the bar should be hidden
|
|
// again when it is no longer visible by modifier.
|
|
bar->visible_by_mode = false;
|
|
bar->visible_by_urgency = false;
|
|
}
|
|
return determine_bar_visibility(bar, false);
|
|
}
|
|
|
|
static bool handle_barconfig_update(struct swaybar *bar, const char *payload,
|
|
json_object *json_config) {
|
|
json_object *json_id = json_object_object_get(json_config, "id");
|
|
const char *id = json_object_get_string(json_id);
|
|
if (strcmp(id, bar->id) != 0) {
|
|
return false;
|
|
}
|
|
|
|
struct swaybar_config *newcfg = init_config();
|
|
ipc_parse_config(newcfg, payload);
|
|
|
|
struct swaybar_config *oldcfg = bar->config;
|
|
bar->config = newcfg;
|
|
|
|
struct swaybar_output *output, *tmp_output;
|
|
wl_list_for_each_safe(output, tmp_output, &bar->outputs, link) {
|
|
bool found = wl_list_empty(&newcfg->outputs);
|
|
struct config_output *coutput;
|
|
wl_list_for_each(coutput, &newcfg->outputs, link) {
|
|
if (strcmp(coutput->name, output->name) == 0 ||
|
|
strcmp(coutput->name, output->identifier) == 0) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
destroy_layer_surface(output);
|
|
wl_list_remove(&output->link);
|
|
wl_list_insert(&bar->unused_outputs, &output->link);
|
|
} else if (!oldcfg->font || !newcfg->font ||
|
|
strcmp(oldcfg->font, newcfg->font) != 0) {
|
|
output->height = 0; // force update height
|
|
}
|
|
}
|
|
wl_list_for_each_safe(output, tmp_output, &bar->unused_outputs, link) {
|
|
bool found = wl_list_empty(&newcfg->outputs);
|
|
struct config_output *coutput;
|
|
wl_list_for_each(coutput, &newcfg->outputs, link) {
|
|
if (strcmp(coutput->name, output->name) == 0 ||
|
|
strcmp(coutput->name, output->identifier) == 0) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (found) {
|
|
wl_list_remove(&output->link);
|
|
wl_list_insert(&bar->outputs, &output->link);
|
|
}
|
|
}
|
|
|
|
if (bar->status && (!newcfg->status_command ||
|
|
strcmp(newcfg->status_command, oldcfg->status_command) != 0)) {
|
|
status_line_free(bar->status);
|
|
bar->status = NULL;
|
|
}
|
|
if (!bar->status && newcfg->status_command) {
|
|
bar->status = status_line_init(newcfg->status_command);
|
|
bar->status->bar = bar;
|
|
loop_add_fd(bar->eventloop, bar->status->read_fd, POLLIN,
|
|
status_in, bar);
|
|
}
|
|
|
|
#if HAVE_TRAY
|
|
if (oldcfg->tray_hidden && !newcfg->tray_hidden) {
|
|
bar->tray = create_tray(bar);
|
|
loop_add_fd(bar->eventloop, bar->tray->fd, POLLIN, tray_in,
|
|
bar->tray->bus);
|
|
} else if (bar->tray && newcfg->tray_hidden) {
|
|
loop_remove_fd(bar->eventloop, bar->tray->fd);
|
|
destroy_tray(bar->tray);
|
|
bar->tray = NULL;
|
|
}
|
|
#endif
|
|
|
|
if (newcfg->workspace_buttons) {
|
|
ipc_get_workspaces(bar);
|
|
}
|
|
|
|
bool moving_layer = strcmp(oldcfg->mode, newcfg->mode) != 0;
|
|
|
|
free_config(oldcfg);
|
|
determine_bar_visibility(bar, moving_layer);
|
|
return true;
|
|
}
|
|
|
|
bool handle_ipc_readable(struct swaybar *bar) {
|
|
struct ipc_response *resp = ipc_recv_response(bar->ipc_event_socketfd);
|
|
if (!resp) {
|
|
return false;
|
|
}
|
|
|
|
// The default depth of 32 is too small to represent some nested layouts, but
|
|
// we can't pass INT_MAX here because json-c (as of this writing) prefaults
|
|
// all the memory for its stack.
|
|
json_tokener *tok = json_tokener_new_ex(256);
|
|
if (!tok) {
|
|
sway_log_errno(SWAY_ERROR, "failed to create tokener");
|
|
free_ipc_response(resp);
|
|
return false;
|
|
}
|
|
|
|
json_object *result = json_tokener_parse_ex(tok, resp->payload, -1);
|
|
enum json_tokener_error err = json_tokener_get_error(tok);
|
|
json_tokener_free(tok);
|
|
|
|
if (err != json_tokener_success) {
|
|
sway_log(SWAY_ERROR, "failed to parse payload as json: %s",
|
|
json_tokener_error_desc(err));
|
|
free_ipc_response(resp);
|
|
return false;
|
|
}
|
|
|
|
bool bar_is_dirty = true;
|
|
switch (resp->type) {
|
|
case IPC_EVENT_WORKSPACE:
|
|
bar_is_dirty = ipc_get_workspaces(bar);
|
|
break;
|
|
case IPC_EVENT_MODE: {
|
|
json_object *json_change, *json_pango_markup;
|
|
if (json_object_object_get_ex(result, "change", &json_change)) {
|
|
const char *change = json_object_get_string(json_change);
|
|
free(bar->mode);
|
|
bar->mode = strcmp(change, "default") != 0 ? strdup(change) : NULL;
|
|
bar->visible_by_mode = bar->mode != NULL;
|
|
determine_bar_visibility(bar, false);
|
|
} else {
|
|
sway_log(SWAY_ERROR, "failed to parse response");
|
|
bar_is_dirty = false;
|
|
break;
|
|
}
|
|
if (json_object_object_get_ex(result,
|
|
"pango_markup", &json_pango_markup)) {
|
|
bar->mode_pango_markup = json_object_get_boolean(json_pango_markup);
|
|
}
|
|
break;
|
|
}
|
|
case IPC_EVENT_BARCONFIG_UPDATE:
|
|
bar_is_dirty = handle_barconfig_update(bar, resp->payload, result);
|
|
break;
|
|
case IPC_EVENT_BAR_STATE_UPDATE:
|
|
bar_is_dirty = handle_bar_state_update(bar, result);
|
|
break;
|
|
default:
|
|
bar_is_dirty = false;
|
|
break;
|
|
}
|
|
json_object_put(result);
|
|
free_ipc_response(resp);
|
|
return bar_is_dirty;
|
|
}
|