sway/sway/main.c

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9.5 KiB
C
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#define _XOPEN_SOURCE 700
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#define _POSIX_C_SOURCE 200112L
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#include <getopt.h>
#include <pango/pangocairo.h>
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#include <signal.h>
#include <stdbool.h>
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
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#include <sys/types.h>
#include <sys/wait.h>
#include <sys/un.h>
#include <unistd.h>
#include <wlr/util/log.h>
#include "sway/commands.h"
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#include "sway/config.h"
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#include "sway/debug.h"
#include "sway/desktop/transaction.h"
#include "sway/server.h"
#include "sway/swaynag.h"
#include "sway/tree/root.h"
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#include "sway/ipc-server.h"
#include "ipc-client.h"
#include "log.h"
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#include "readline.h"
#include "stringop.h"
#include "util.h"
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static bool terminate_request = false;
static int exit_value = 0;
struct sway_server server;
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void sway_terminate(int exit_code) {
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terminate_request = true;
exit_value = exit_code;
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ipc_event_shutdown("exit");
wl_display_terminate(server.wl_display);
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}
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void sig_handler(int signal) {
sway_terminate(EXIT_SUCCESS);
}
void detect_raspi(void) {
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bool raspi = false;
FILE *f = fopen("/sys/firmware/devicetree/base/model", "r");
if (!f) {
return;
}
char *line;
while(!feof(f)) {
if (!(line = read_line(f))) {
break;
}
if (strstr(line, "Raspberry Pi")) {
raspi = true;
}
free(line);
}
fclose(f);
FILE *g = fopen("/proc/modules", "r");
if (!g) {
return;
}
bool vc4 = false;
while (!feof(g)) {
if (!(line = read_line(g))) {
break;
}
if (strstr(line, "vc4")) {
vc4 = true;
}
free(line);
}
fclose(g);
if (!vc4 && raspi) {
fprintf(stderr, "\x1B[1;31mWarning: You have a "
"Raspberry Pi, but the vc4 Module is "
"not loaded! Set 'dtoverlay=vc4-kms-v3d'"
"in /boot/config.txt and reboot.\x1B[0m\n");
}
}
void detect_proprietary(int allow_unsupported_gpu) {
FILE *f = fopen("/proc/modules", "r");
if (!f) {
return;
}
while (!feof(f)) {
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char *line;
if (!(line = read_line(f))) {
break;
}
if (strstr(line, "nvidia")) {
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free(line);
if (allow_unsupported_gpu) {
wlr_log(WLR_ERROR,
"!!! Proprietary Nvidia drivers are in use !!!");
} else {
wlr_log(WLR_ERROR,
"Proprietary Nvidia drivers are NOT supported. "
"Use Nouveau. To launch sway anyway, launch with "
"--my-next-gpu-wont-be-nvidia and DO NOT report issues.");
exit(EXIT_FAILURE);
}
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break;
}
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if (strstr(line, "fglrx")) {
free(line);
if (allow_unsupported_gpu) {
wlr_log(WLR_ERROR,
"!!! Proprietary AMD drivers are in use !!!");
} else {
wlr_log(WLR_ERROR, "Proprietary AMD drivers do NOT support "
"Wayland. Use radeon. To try anyway, launch sway with "
"--unsupported-gpu and DO NOT report issues.");
exit(EXIT_FAILURE);
}
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break;
}
free(line);
}
fclose(f);
}
void run_as_ipc_client(char *command, char *socket_path) {
int socketfd = ipc_open_socket(socket_path);
uint32_t len = strlen(command);
char *resp = ipc_single_command(socketfd, IPC_COMMAND, command, &len);
printf("%s\n", resp);
close(socketfd);
}
static void log_env(void) {
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const char *log_vars[] = {
"PATH",
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"LD_LIBRARY_PATH",
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"LD_PRELOAD_PATH",
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"LD_LIBRARY_PATH",
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"SWAY_CURSOR_THEME",
"SWAY_CURSOR_SIZE",
"SWAYSOCK"
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};
for (size_t i = 0; i < sizeof(log_vars) / sizeof(char *); ++i) {
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wlr_log(WLR_INFO, "%s=%s", log_vars[i], getenv(log_vars[i]));
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}
}
static void log_distro(void) {
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const char *paths[] = {
"/etc/lsb-release",
"/etc/os-release",
"/etc/debian_version",
"/etc/redhat-release",
"/etc/gentoo-release",
};
for (size_t i = 0; i < sizeof(paths) / sizeof(char *); ++i) {
FILE *f = fopen(paths[i], "r");
if (f) {
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wlr_log(WLR_INFO, "Contents of %s:", paths[i]);
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while (!feof(f)) {
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char *line;
if (!(line = read_line(f))) {
break;
}
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if (*line) {
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wlr_log(WLR_INFO, "%s", line);
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}
free(line);
}
fclose(f);
}
}
}
static void log_kernel(void) {
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FILE *f = popen("uname -a", "r");
if (!f) {
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wlr_log(WLR_INFO, "Unable to determine kernel version");
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return;
}
while (!feof(f)) {
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char *line;
if (!(line = read_line(f))) {
break;
}
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if (*line) {
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wlr_log(WLR_INFO, "%s", line);
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}
free(line);
}
pclose(f);
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}
static void drop_permissions(void) {
if (getuid() != geteuid() || getgid() != getegid()) {
if (setgid(getgid()) != 0) {
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wlr_log(WLR_ERROR, "Unable to drop root");
exit(EXIT_FAILURE);
}
if (setuid(getuid()) != 0) {
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wlr_log(WLR_ERROR, "Unable to drop root");
exit(EXIT_FAILURE);
}
}
if (setuid(0) != -1) {
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wlr_log(WLR_ERROR, "Root privileges can be restored.");
exit(EXIT_FAILURE);
}
}
void enable_debug_flag(const char *flag) {
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if (strcmp(flag, "damage=highlight") == 0) {
debug.damage = DAMAGE_HIGHLIGHT;
} else if (strcmp(flag, "damage=rerender") == 0) {
debug.damage = DAMAGE_RERENDER;
} else if (strcmp(flag, "noatomic") == 0) {
debug.noatomic = true;
} else if (strcmp(flag, "render-tree") == 0) {
debug.render_tree = true;
} else if (strcmp(flag, "txn-wait") == 0) {
debug.txn_wait = true;
} else if (strcmp(flag, "txn-timings") == 0) {
debug.txn_timings = true;
} else if (strncmp(flag, "txn-timeout=", 12) == 0) {
server.txn_timeout_ms = atoi(&flag[12]);
}
}
int main(int argc, char **argv) {
static int verbose = 0, debug = 0, validate = 0, allow_unsupported_gpu = 0;
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static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
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{"config", required_argument, NULL, 'c'},
{"validate", no_argument, NULL, 'C'},
{"debug", no_argument, NULL, 'd'},
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{"version", no_argument, NULL, 'v'},
{"verbose", no_argument, NULL, 'V'},
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{"get-socketpath", no_argument, NULL, 'p'},
{"unsupported-gpu", no_argument, NULL, 'u'},
{"my-next-gpu-wont-be-nvidia", no_argument, NULL, 'u'},
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{0, 0, 0, 0}
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};
char *config_path = NULL;
const char* usage =
"Usage: sway [options] [command]\n"
"\n"
" -h, --help Show help message and quit.\n"
" -c, --config <config> Specify a config file.\n"
" -C, --validate Check the validity of the config file, then exit.\n"
" -d, --debug Enables full logging, including debug information.\n"
" -v, --version Show the version number and quit.\n"
" -V, --verbose Enables more verbose logging.\n"
" --get-socketpath Gets the IPC socket path and prints it, then exits.\n"
"\n";
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int c;
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "hCdD:vVc:", long_options, &option_index);
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if (c == -1) {
break;
}
switch (c) {
case 'h': // help
fprintf(stdout, "%s", usage);
exit(EXIT_SUCCESS);
break;
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case 'c': // config
config_path = strdup(optarg);
break;
case 'C': // validate
validate = 1;
break;
case 'd': // debug
debug = 1;
break;
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case 'D': // extended debug options
enable_debug_flag(optarg);
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break;
case 'u':
allow_unsupported_gpu = 1;
break;
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case 'v': // version
fprintf(stdout, "sway version " SWAY_VERSION "\n");
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exit(EXIT_SUCCESS);
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break;
case 'V': // verbose
verbose = 1;
break;
case 'p': ; // --get-socketpath
if (getenv("SWAYSOCK")) {
fprintf(stdout, "%s\n", getenv("SWAYSOCK"));
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exit(EXIT_SUCCESS);
} else {
fprintf(stderr, "sway socket not detected.\n");
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exit(EXIT_FAILURE);
}
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break;
default:
fprintf(stderr, "%s", usage);
exit(EXIT_FAILURE);
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}
}
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if (debug) {
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wlr_log_init(WLR_DEBUG, NULL);
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} else if (verbose || validate) {
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wlr_log_init(WLR_INFO, NULL);
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} else {
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wlr_log_init(WLR_ERROR, NULL);
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}
if (optind < argc) { // Behave as IPC client
if(optind != 1) {
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wlr_log(WLR_ERROR, "Don't use options with the IPC client");
exit(EXIT_FAILURE);
}
drop_permissions();
char *socket_path = getenv("SWAYSOCK");
if (!socket_path) {
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wlr_log(WLR_ERROR, "Unable to retrieve socket path");
exit(EXIT_FAILURE);
}
char *command = join_args(argv + optind, argc - optind);
run_as_ipc_client(command, socket_path);
return 0;
}
if (!server_privileged_prepare(&server)) {
return 1;
}
log_kernel();
log_distro();
detect_proprietary(allow_unsupported_gpu);
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detect_raspi();
drop_permissions();
// handle SIGTERM signals
signal(SIGTERM, sig_handler);
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// prevent ipc from crashing sway
signal(SIGPIPE, SIG_IGN);
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wlr_log(WLR_INFO, "Starting sway version " SWAY_VERSION);
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Implement type safe arguments and demote sway_container This commit changes the meaning of sway_container so that it only refers to layout containers and view containers. Workspaces, outputs and the root are no longer known as containers. Instead, root, outputs, workspaces and containers are all a type of node, and containers come in two types: layout containers and view containers. In addition to the above, this implements type safe variables. This means we use specific types such as sway_output and sway_workspace instead of generic containers or nodes. However, it's worth noting that in a few places places (eg. seat focus and transactions) referring to them in a generic way is unavoidable which is why we still use nodes in some places. If you want a TL;DR, look at node.h, as well as the struct definitions for root, output, workspace and container. Note that sway_output now contains a workspaces list, and workspaces now contain a tiling and floating list, and containers now contain a pointer back to the workspace. There are now functions for seat_get_focused_workspace and seat_get_focused_container. The latter will return NULL if a workspace itself is focused. Most other seat functions like seat_get_focus and seat_set_focus now accept and return nodes. In the config->handler_context struct, current_container has been replaced with three pointers: node, container and workspace. node is the same as what current_container was, while workspace is the workspace that the node resides on and container is the actual container, which may be NULL if a workspace itself is focused. The global root_container variable has been replaced with one simply called root, which is a pointer to the sway_root instance. The way outputs are created, enabled, disabled and destroyed has changed. Previously we'd wrap the sway_output in a container when it is enabled, but as we don't have containers any more it needs a different approach. The output_create and output_destroy functions previously created/destroyed the container, but now they create/destroy the sway_output. There is a new function output_disable to disable an output without destroying it. Containers have a new view property. If this is populated then the container is a view container, otherwise it's a layout container. Like before, this property is immutable for the life of the container. Containers have both a `sway_container *parent` and `sway_workspace *workspace`. As we use specific types now, parent cannot point to a workspace so it'll be NULL for containers which are direct children of the workspace. The workspace property is set for all containers, except those which are hidden in the scratchpad as they have no workspace. In some cases we need to refer to workspaces in a container-like way. For example, workspaces have layout and children, but when using specific types this makes it difficult. Likewise, it's difficult for a container to get its parent's layout when the parent could be another container or a workspace. To make it easier, some helper functions have been created: container_parent_layout and container_get_siblings. container_remove_child has been renamed to container_detach and container_replace_child has been renamed to container_replace. `container_handle_fullscreen_reparent(con, old_parent)` has had the old_parent removed. We now unfullscreen the workspace when detaching the container, so this function is simplified and only needs one argument now. container_notify_subtree_changed has been renamed to container_update_representation. This is more descriptive of its purpose. I also wanted to be able to call it with whatever container was changed rather than the container's parent, which makes bubbling up to the workspace easier. There are now state structs per node thing. ie. sway_output_state, sway_workspace_state and sway_container_state. The focus, move and layout commands have been completely refactored to work with the specific types. I considered making these a separate PR, but I'd be backporting my changes only to replace them again, and it's easier just to test everything at once.
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root = root_create();
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if (!server_init(&server)) {
return 1;
}
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ipc_init(&server);
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log_env();
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if (validate) {
bool valid = load_main_config(config_path, false, true);
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return valid ? 0 : 1;
}
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setenv("WAYLAND_DISPLAY", server.socket, true);
if (!load_main_config(config_path, false, false)) {
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sway_terminate(EXIT_FAILURE);
}
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if (config_path) {
free(config_path);
}
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if (!terminate_request) {
if (!server_start_backend(&server)) {
sway_terminate(EXIT_FAILURE);
}
}
config->active = true;
load_swaybars();
// Execute commands until there are none left
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wlr_log(WLR_DEBUG, "Running deferred commands");
while (config->cmd_queue->length) {
char *line = config->cmd_queue->items[0];
struct cmd_results *res = execute_command(line, NULL, NULL);
if (res->status != CMD_SUCCESS) {
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wlr_log(WLR_ERROR, "Error on line '%s': %s", line, res->error);
}
free_cmd_results(res);
free(line);
list_del(config->cmd_queue, 0);
}
transaction_commit_dirty();
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if (config->swaynag_config_errors.pid > 0) {
swaynag_show(&config->swaynag_config_errors);
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}
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if (!terminate_request) {
server_run(&server);
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}
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wlr_log(WLR_INFO, "Shutting down sway");
server_fini(&server);
Implement type safe arguments and demote sway_container This commit changes the meaning of sway_container so that it only refers to layout containers and view containers. Workspaces, outputs and the root are no longer known as containers. Instead, root, outputs, workspaces and containers are all a type of node, and containers come in two types: layout containers and view containers. In addition to the above, this implements type safe variables. This means we use specific types such as sway_output and sway_workspace instead of generic containers or nodes. However, it's worth noting that in a few places places (eg. seat focus and transactions) referring to them in a generic way is unavoidable which is why we still use nodes in some places. If you want a TL;DR, look at node.h, as well as the struct definitions for root, output, workspace and container. Note that sway_output now contains a workspaces list, and workspaces now contain a tiling and floating list, and containers now contain a pointer back to the workspace. There are now functions for seat_get_focused_workspace and seat_get_focused_container. The latter will return NULL if a workspace itself is focused. Most other seat functions like seat_get_focus and seat_set_focus now accept and return nodes. In the config->handler_context struct, current_container has been replaced with three pointers: node, container and workspace. node is the same as what current_container was, while workspace is the workspace that the node resides on and container is the actual container, which may be NULL if a workspace itself is focused. The global root_container variable has been replaced with one simply called root, which is a pointer to the sway_root instance. The way outputs are created, enabled, disabled and destroyed has changed. Previously we'd wrap the sway_output in a container when it is enabled, but as we don't have containers any more it needs a different approach. The output_create and output_destroy functions previously created/destroyed the container, but now they create/destroy the sway_output. There is a new function output_disable to disable an output without destroying it. Containers have a new view property. If this is populated then the container is a view container, otherwise it's a layout container. Like before, this property is immutable for the life of the container. Containers have both a `sway_container *parent` and `sway_workspace *workspace`. As we use specific types now, parent cannot point to a workspace so it'll be NULL for containers which are direct children of the workspace. The workspace property is set for all containers, except those which are hidden in the scratchpad as they have no workspace. In some cases we need to refer to workspaces in a container-like way. For example, workspaces have layout and children, but when using specific types this makes it difficult. Likewise, it's difficult for a container to get its parent's layout when the parent could be another container or a workspace. To make it easier, some helper functions have been created: container_parent_layout and container_get_siblings. container_remove_child has been renamed to container_detach and container_replace_child has been renamed to container_replace. `container_handle_fullscreen_reparent(con, old_parent)` has had the old_parent removed. We now unfullscreen the workspace when detaching the container, so this function is simplified and only needs one argument now. container_notify_subtree_changed has been renamed to container_update_representation. This is more descriptive of its purpose. I also wanted to be able to call it with whatever container was changed rather than the container's parent, which makes bubbling up to the workspace easier. There are now state structs per node thing. ie. sway_output_state, sway_workspace_state and sway_container_state. The focus, move and layout commands have been completely refactored to work with the specific types. I considered making these a separate PR, but I'd be backporting my changes only to replace them again, and it's easier just to test everything at once.
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root_destroy(root);
root = NULL;
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if (config) {
free_config(config);
}
pango_cairo_font_map_set_default(NULL);
return exit_value;
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}