/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* main.c: Initialization, main loop
*
*/
#include "all.h"
#include "shmlog.h"
#include <ev.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <locale.h>
#include <signal.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>
#include <unistd.h>
#include <xcb/xcb_atom.h>
#include <xcb/xinerama.h>
#include <xcb/bigreq.h>
#ifdef I3_ASAN_ENABLED
#include <sanitizer/lsan_interface.h>
#endif
#include "sd-daemon.h"
#include "i3-atoms_NET_SUPPORTED.xmacro.h"
#include "i3-atoms_rest.xmacro.h"
/* The original value of RLIMIT_CORE when i3 was started. We need to restore
* this before starting any other process, since we set RLIMIT_CORE to
* RLIM_INFINITY for i3 debugging versions. */
struct rlimit original_rlimit_core;
/* The number of file descriptors passed via socket activation. */
int listen_fds;
/* We keep the xcb_prepare watcher around to be able to enable and disable it
* temporarily for drag_pointer(). */
static struct ev_prepare *xcb_prepare;
char **start_argv;
xcb_connection_t *conn;
/* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
int conn_screen;
/* Display handle for libstartup-notification */
SnDisplay *sndisplay;
/* The last timestamp we got from X11 (timestamps are included in some events
* and are used for some things, like determining a unique ID in startup
* notification). */
xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
xcb_screen_t *root_screen;
xcb_window_t root;
xcb_window_t wm_sn_selection_owner;
xcb_atom_t wm_sn;
/* Color depth, visual id and colormap to use when creating windows and
* pixmaps. Will use 32 bit depth and an appropriate visual, if available,
* otherwise the root window’s default (usually 24 bit TrueColor). */
uint8_t root_depth;
xcb_visualtype_t *visual_type;
xcb_colormap_t colormap;
struct ev_loop *main_loop;
xcb_key_symbols_t *keysyms;
/* Default shmlog size if not set by user. */
const int default_shmlog_size = 25 * 1024 * 1024;
/* The list of key bindings */
struct bindings_head *bindings;
const char *current_binding_mode = NULL;
/* The list of exec-lines */
struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
/* The list of exec_always lines */
struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
/* The list of assignments */
struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
/* The list of workspace assignments (which workspace should end up on which
* output) */
struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
/* We hope that those are supported and set them to true */
bool xkb_supported = true;
bool shape_supported = true;
bool force_xinerama = false;
/* Define all atoms as global variables */
#define xmacro(atom) xcb_atom_t A_##atom;
I3_NET_SUPPORTED_ATOMS_XMACRO
I3_REST_ATOMS_XMACRO
#undef xmacro
/*
* This callback is only a dummy, see xcb_prepare_cb.
* See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
*
*/
static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
/* empty, because xcb_prepare_cb are used */
}
/*
* Called just before the event loop sleeps. Ensures xcb’s incoming and outgoing
* queues are empty so that any activity will trigger another event loop
* iteration, and hence another xcb_prepare_cb invocation.
*
*/
static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
/* Process all queued (and possibly new) events before the event loop
sleeps. */
xcb_generic_event_t *event;
while ((event = xcb_poll_for_event(conn)) != NULL) {
if (event->response_type == 0) {
if (event_is_ignored(event->sequence, 0))
DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
else {
xcb_generic_error_t *error = (xcb_generic_error_t *)event;
DLOG("X11 Error received (probably harmless)! sequence 0x%x, error_code = %d\n",
error->sequence, error->error_code);
}
free(event);
continue;
}
/* Strip off the highest bit (set if the event is generated) */
int type = (event->response_type & 0x7F);
handle_event(type, event);
free(event);
}
/* Flush all queued events to X11. */
xcb_flush(conn);
}
/*
* Enable or disable the main X11 event handling function.
* This is used by drag_pointer() which has its own, modal event handler, which
* takes precedence over the normal event handler.
*
*/
void main_set_x11_cb(bool enable) {
DLOG("Setting main X11 callback to enabled=%d\n", enable);
if (enable) {
ev_prepare_start(main_loop, xcb_prepare);
/* Trigger the watcher explicitly to handle all remaining X11 events.
* drag_pointer()’s event handler exits in the middle of the loop. */
ev_feed_event(main_loop, xcb_prepare, 0);
} else {
ev_prepare_stop(main_loop, xcb_prepare);
}
}
/*
* Exit handler which destroys the main_loop. Will trigger cleanup handlers.
*
*/
static void i3_exit(void) {
if (*shmlogname != '\0') {
fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
fflush(stderr);
shm_unlink(shmlogname);
}
ipc_shutdown(SHUTDOWN_REASON_EXIT, -1);
unlink(config.ipc_socket_path);
if (current_log_stream_socket_path != NULL) {
unlink(current_log_stream_socket_path);
}
xcb_disconnect(conn);
/* If a nagbar is active, kill it */
kill_nagbar(config_error_nagbar_pid, false);
kill_nagbar(command_error_nagbar_pid, false);
/* We need ev >= 4 for the following code. Since it is not *that* important (it
* only makes sure that there are no i3-nagbar instances left behind) we still
* support old systems with libev 3. */
#if EV_VERSION_MAJOR >= 4
ev_loop_destroy(main_loop);
#endif
#ifdef I3_ASAN_ENABLED
__lsan_do_leak_check();
#endif
}
/*
* (One-shot) Handler for all signals with default action "Core", see signal(7)
*
* Unlinks the SHM log and re-raises the signal.
*
*/
static void handle_core_signal(int sig, siginfo_t *info, void *data) {
if (*shmlogname != '\0') {
shm_unlink(shmlogname);
}
raise(sig);
}
/*
* (One-shot) Handler for all signals with default action "Term", see signal(7)
*
* Exits the program gracefully.
*
*/
static void handle_term_signal(struct ev_loop *loop, ev_signal *signal, int revents) {
/* We exit gracefully here in the sense that cleanup handlers
* installed via atexit are invoked. */
exit(128 + signal->signum);
}
/*
* Set up handlers for all signals with default action "Term", see signal(7)
*
*/
static void setup_term_handlers(void) {
static struct ev_signal signal_watchers[6];
size_t num_watchers = sizeof(signal_watchers) / sizeof(signal_watchers[0]);
/* We have to rely on libev functionality here and should not use
* sigaction handlers because we need to invoke the exit handlers
* and cannot do so from an asynchronous signal handling context as
* not all code triggered during exit is signal safe (and exiting
* the main loop from said handler is not easily possible). libev's
* signal handlers does not impose such a constraint on us. */
ev_signal_init(&signal_watchers[0], handle_term_signal, SIGHUP);
ev_signal_init(&signal_watchers[1], handle_term_signal, SIGINT);
ev_signal_init(&signal_watchers[2], handle_term_signal, SIGALRM);
ev_signal_init(&signal_watchers[3], handle_term_signal, SIGTERM);
ev_signal_init(&signal_watchers[4], handle_term_signal, SIGUSR1);
ev_signal_init(&signal_watchers[5], handle_term_signal, SIGUSR1);
for (size_t i = 0; i < num_watchers; i++) {
ev_signal_start(main_loop, &signal_watchers[i]);
/* The signal handlers should not block ev_run from returning
* and so none of the signal handlers should hold a reference to
* the main loop. */
ev_unref(main_loop);
}
}
static int parse_restart_fd(void) {
const char *restart_fd = getenv("_I3_RESTART_FD");
if (restart_fd == NULL) {
return -1;
}
long int fd = -1;
if (!parse_long(restart_fd, &fd, 10)) {
ELOG("Malformed _I3_RESTART_FD \"%s\"\n", restart_fd);
return -1;
}
return fd;
}
int main(int argc, char *argv[]) {
/* Keep a symbol pointing to the I3_VERSION string constant so that we have
* it in gdb backtraces. */
static const char *_i3_version __attribute__((used)) = I3_VERSION;
char *override_configpath = NULL;
bool autostart = true;
char *layout_path = NULL;
bool delete_layout_path = false;
bool disable_randr15 = false;
char *fake_outputs = NULL;
bool disable_signalhandler = false;
bool only_check_config = false;
bool replace_wm = false;
static struct option long_options[] = {
{"no-autostart", no_argument, 0, 'a'},
{"config", required_argument, 0, 'c'},
{"version", no_argument, 0, 'v'},
{"moreversion", no_argument, 0, 'm'},
{"more-version", no_argument, 0, 'm'},
{"more_version", no_argument, 0, 'm'},
{"help", no_argument, 0, 'h'},
{"layout", required_argument, 0, 'L'},
{"restart", required_argument, 0, 0},
{"force-xinerama", no_argument, 0, 0},
{"force_xinerama", no_argument, 0, 0},
{"disable-randr15", no_argument, 0, 0},
{"disable_randr15", no_argument, 0, 0},
{"disable-signalhandler", no_argument, 0, 0},
{"shmlog-size", required_argument, 0, 0},
{"shmlog_size", required_argument, 0, 0},
{"get-socketpath", no_argument, 0, 0},
{"get_socketpath", no_argument, 0, 0},
{"fake_outputs", required_argument, 0, 0},
{"fake-outputs", required_argument, 0, 0},
{"force-old-config-parser-v4.4-only", no_argument, 0, 0},
{"replace", no_argument, 0, 'r'},
{0, 0, 0, 0}};
int option_index = 0, opt;
setlocale(LC_ALL, "");
/* Get the RLIMIT_CORE limit at startup time to restore this before
* starting processes. */
getrlimit(RLIMIT_CORE, &original_rlimit_core);
/* Disable output buffering to make redirects in .xsession actually useful for debugging */
if (!isatty(fileno(stdout)))
setbuf(stdout, NULL);
srand(time(NULL));
/* Init logging *before* initializing debug_build to guarantee early
* (file) logging. */
init_logging();
/* On release builds, disable SHM logging by default. */
shmlog_size = (is_debug_build() || strstr(argv[0], "i3-with-shmlog") != NULL ? default_shmlog_size : 0);
start_argv = argv;
while ((opt = getopt_long(argc, argv, "c:CvmaL:hld:Vr", long_options, &option_index)) != -1) {
switch (opt) {
case 'a':
LOG("Autostart disabled using -a\n");
autostart = false;
break;
case 'L':
FREE(layout_path);
layout_path = sstrdup(optarg);
delete_layout_path = false;
break;
case 'c':
FREE(override_configpath);
override_configpath = sstrdup(optarg);
break;
case 'C':
LOG("Checking configuration file only (-C)\n");
only_check_config = true;
break;
case 'v':
printf("i3 version %s © 2009 Michael Stapelberg and contributors\n", i3_version);
exit(EXIT_SUCCESS);
break;
case 'm':
printf("Binary i3 version: %s © 2009 Michael Stapelberg and contributors\n", i3_version);
display_running_version();
exit(EXIT_SUCCESS);
break;
case 'V':
set_verbosity(true);
break;
case 'd':
LOG("Enabling debug logging\n");
set_debug_logging(true);
break;
case 'l':
/* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
break;
case 'r':
replace_wm = true;
break;
case 0:
if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
strcmp(long_options[option_index].name, "force_xinerama") == 0) {
force_xinerama = true;
ELOG("Using Xinerama instead of RandR. This option should be "
"avoided at all cost because it does not refresh the list "
"of screens, so you cannot configure displays at runtime. "
"Please check if your driver really does not support RandR "
"and disable this option as soon as you can.\n");
break;
} else if (strcmp(long_options[option_index].name, "disable-randr15") == 0 ||
strcmp(long_options[option_index].name, "disable_randr15") == 0) {
disable_randr15 = true;
break;
} else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
disable_signalhandler = true;
break;
} else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
strcmp(long_options[option_index].name, "get_socketpath") == 0) {
char *socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
if (socket_path) {
printf("%s\n", socket_path);
/* With -O2 (i.e. the buildtype=debugoptimized meson
* option, which we set by default), gcc 9.2.1 optimizes
* away socket_path at this point, resulting in a Leak
* Sanitizer report. An explicit free helps: */
free(socket_path);
exit(EXIT_SUCCESS);
}
exit(EXIT_FAILURE);
} else if (strcmp(long_options[option_index].name, "shmlog-size") == 0 ||
strcmp(long_options[option_index].name, "shmlog_size") == 0) {
shmlog_size = atoi(optarg);
/* Re-initialize logging immediately to get as many
* logmessages as possible into the SHM log. */
init_logging();
LOG("Limiting SHM log size to %d bytes\n", shmlog_size);
break;
} else if (strcmp(long_options[option_index].name, "restart") == 0) {
FREE(layout_path);
layout_path = sstrdup(optarg);
delete_layout_path = true;
break;
} else if (strcmp(long_options[option_index].name, "fake-outputs") == 0 ||
strcmp(long_options[option_index].name, "fake_outputs") == 0) {
LOG("Initializing fake outputs: %s\n", optarg);
fake_outputs = sstrdup(optarg);
break;
} else if (strcmp(long_options[option_index].name, "force-old-config-parser-v4.4-only") == 0) {
ELOG("You are passing --force-old-config-parser-v4.4-only, but that flag was removed by now.\n");
break;
}
/* fall-through */
default:
fprintf(stderr, "Usage: %s [-c configfile] [-d all] [-a] [-v] [-V] [-C]\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
fprintf(stderr, "\t-C validate configuration file and exit\n");
fprintf(stderr, "\t-d all enable debug output\n");
fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
fprintf(stderr, "\t-v display version and exit\n");
fprintf(stderr, "\t-V enable verbose mode\n");
fprintf(stderr, "\n");
fprintf(stderr, "\t--force-xinerama\n"
"\tUse Xinerama instead of RandR.\n"
"\tThis option should only be used if you are stuck with the\n"
"\told nVidia closed source driver (older than 302.17), which does\n"
"\tnot support RandR.\n");
fprintf(stderr, "\n");
fprintf(stderr, "\t--get-socketpath\n"
"\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
fprintf(stderr, "\n");
fprintf(stderr, "\t--shmlog-size <limit>\n"
"\tLimits the size of the i3 SHM log to <limit> bytes. Setting this\n"
"\tto 0 disables SHM logging entirely.\n"
"\tThe default is %d bytes.\n",
shmlog_size);
fprintf(stderr, "\n");
fprintf(stderr, "\t--replace\n"
"\tReplace an existing window manager.\n");
fprintf(stderr, "\n");
fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
"to send to a currently running i3 (like i3-msg). This allows you to\n"
"use nice and logical commands, such as:\n"
"\n"
"\ti3 border none\n"
"\ti3 floating toggle\n"
"\ti3 kill window\n"
"\n");
exit(opt == 'h' ? EXIT_SUCCESS : EXIT_FAILURE);
}
}
if (only_check_config) {
exit(load_configuration(override_configpath, C_VALIDATE) ? EXIT_SUCCESS : EXIT_FAILURE);
}
/* If the user passes more arguments, we act like i3-msg would: Just send
* the arguments as an IPC message to i3. This allows for nice semantic
* commands such as 'i3 border none'. */
if (optind < argc) {
/* We enable verbose mode so that the user knows what’s going on.
* This should make it easier to find mistakes when the user passes
* arguments by mistake. */
set_verbosity(true);
LOG("Additional arguments passed. Sending them as a command to i3.\n");
char *payload = NULL;
while (optind < argc) {
if (!payload) {
payload = sstrdup(argv[optind]);
} else {
char *both;
sasprintf(&both, "%s %s", payload, argv[optind]);
free(payload);
payload = both;
}
optind++;
}
DLOG("Command is: %s (%zd bytes)\n", payload, strlen(payload));
char *socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
if (!socket_path) {
ELOG("Could not get i3 IPC socket path\n");
return 1;
}
int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
if (sockfd == -1)
err(EXIT_FAILURE, "Could not create socket");
struct sockaddr_un addr;
memset(&addr, 0, sizeof(struct sockaddr_un));
addr.sun_family = AF_LOCAL;
strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
FREE(socket_path);
if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
err(EXIT_FAILURE, "Could not connect to i3");
if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_RUN_COMMAND,
(uint8_t *)payload) == -1)
err(EXIT_FAILURE, "IPC: write()");
FREE(payload);
uint32_t reply_length;
uint32_t reply_type;
uint8_t *reply;
int ret;
if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
if (ret == -1)
err(EXIT_FAILURE, "IPC: read()");
return 1;
}
if (reply_type != I3_IPC_REPLY_TYPE_COMMAND)
errx(EXIT_FAILURE, "IPC: received reply of type %d but expected %d (COMMAND)", reply_type, I3_IPC_REPLY_TYPE_COMMAND);
printf("%.*s\n", reply_length, reply);
FREE(reply);
return 0;
}
/* Enable logging to handle the case when the user did not specify --shmlog-size */
init_logging();
/* Try to enable core dumps by default when running a debug build */
if (is_debug_build()) {
struct rlimit limit = {RLIM_INFINITY, RLIM_INFINITY};
setrlimit(RLIMIT_CORE, &limit);
/* The following code is helpful, but not required. We thus don’t pay
* much attention to error handling, non-linux or other edge cases. */
LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
size_t cwd_size = 1024;
char *cwd = smalloc(cwd_size);
char *cwd_ret;
while ((cwd_ret = getcwd(cwd, cwd_size)) == NULL && errno == ERANGE) {
cwd_size = cwd_size * 2;
cwd = srealloc(cwd, cwd_size);
}
if (cwd_ret != NULL)
LOG("CORE DUMPS: Your current working directory is \"%s\".\n", cwd);
int patternfd;
if ((patternfd = open("/proc/sys/kernel/core_pattern", O_RDONLY)) >= 0) {
memset(cwd, '\0', cwd_size);
if (read(patternfd, cwd, cwd_size) > 0)
/* a trailing newline is included in cwd */
LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
close(patternfd);
}
free(cwd);
}
LOG("i3 %s starting\n", i3_version);
conn = xcb_connect(NULL, &conn_screen);
if (xcb_connection_has_error(conn))
errx(EXIT_FAILURE, "Cannot open display");
sndisplay = sn_xcb_display_new(conn, NULL, NULL);
/* Initialize the libev event loop. This needs to be done before loading
* the config file because the parser will install an ev_child watcher
* for the nagbar when config errors are found. */
main_loop = EV_DEFAULT;
if (main_loop == NULL)
die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
root_screen = xcb_aux_get_screen(conn, conn_screen);
root = root_screen->root;
/* Prefetch X11 extensions that we are interested in. */
xcb_prefetch_extension_data(conn, &xcb_xkb_id);
xcb_prefetch_extension_data(conn, &xcb_shape_id);
/* BIG-REQUESTS is used by libxcb internally. */
xcb_prefetch_extension_data(conn, &xcb_big_requests_id);
if (force_xinerama) {
xcb_prefetch_extension_data(conn, &xcb_xinerama_id);
} else {
xcb_prefetch_extension_data(conn, &xcb_randr_id);
}
/* Prepare for us to get a current timestamp as recommended by ICCCM */
xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){XCB_EVENT_MASK_PROPERTY_CHANGE});
xcb_change_property(conn, XCB_PROP_MODE_APPEND, root, XCB_ATOM_SUPERSCRIPT_X, XCB_ATOM_CARDINAL, 32, 0, "");
/* Place requests for the atoms we need as soon as possible */
#define xmacro(atom) \
xcb_intern_atom_cookie_t atom##_cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
I3_NET_SUPPORTED_ATOMS_XMACRO
I3_REST_ATOMS_XMACRO
#undef xmacro
root_depth = root_screen->root_depth;
colormap = root_screen->default_colormap;
visual_type = xcb_aux_find_visual_by_attrs(root_screen, -1, 32);
if (visual_type != NULL) {
root_depth = xcb_aux_get_depth_of_visual(root_screen, visual_type->visual_id);
colormap = xcb_generate_id(conn);
xcb_void_cookie_t cm_cookie = xcb_create_colormap_checked(conn,
XCB_COLORMAP_ALLOC_NONE,
colormap,
root,
visual_type->visual_id);
xcb_generic_error_t *error = xcb_request_check(conn, cm_cookie);
if (error != NULL) {
ELOG("Could not create colormap. Error code: %d\n", error->error_code);
exit(EXIT_FAILURE);
}
} else {
visual_type = get_visualtype(root_screen);
}
xcb_prefetch_maximum_request_length(conn);
init_dpi();
DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_type->visual_id);
DLOG("root_screen->height_in_pixels = %d, root_screen->height_in_millimeters = %d\n",
root_screen->height_in_pixels, root_screen->height_in_millimeters);
DLOG("One logical pixel corresponds to %d physical pixels on this display.\n", logical_px(1));
xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
/* Get the PropertyNotify event we caused above */
xcb_flush(conn);
{
xcb_generic_event_t *event;
DLOG("waiting for PropertyNotify event\n");
while ((event = xcb_wait_for_event(conn)) != NULL) {
if (event->response_type == XCB_PROPERTY_NOTIFY) {
last_timestamp = ((xcb_property_notify_event_t *)event)->time;
free(event);
break;
}
free(event);
}
DLOG("got timestamp %d\n", last_timestamp);
}
/* Setup NetWM atoms */
#define xmacro(name) \
do { \
xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(conn, name##_cookie, NULL); \
if (!reply) { \
ELOG("Could not get atom " #name "\n"); \
exit(-1); \
} \
A_##name = reply->atom; \
free(reply); \
} while (0);
I3_NET_SUPPORTED_ATOMS_XMACRO
I3_REST_ATOMS_XMACRO
#undef xmacro
load_configuration(override_configpath, C_LOAD);
if (config.ipc_socket_path == NULL) {
/* Fall back to a file name in /tmp/ based on the PID */
if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
config.ipc_socket_path = get_process_filename("ipc-socket");
else
config.ipc_socket_path = sstrdup(config.ipc_socket_path);
}
/* Create the UNIX domain socket for IPC */
int ipc_socket = create_socket(config.ipc_socket_path, ¤t_socketpath);
if (ipc_socket == -1) {
die("Could not create the IPC socket: %s", config.ipc_socket_path);
}
if (config.force_xinerama) {
force_xinerama = true;
}
/* Acquire the WM_Sn selection. */
{
/* Get the WM_Sn atom */
char *atom_name = xcb_atom_name_by_screen("WM", conn_screen);
wm_sn_selection_owner = xcb_generate_id(conn);
if (atom_name == NULL) {
ELOG("xcb_atom_name_by_screen(\"WM\", %d) failed, exiting\n", conn_screen);
return 1;
}
xcb_intern_atom_reply_t *atom_reply;
atom_reply = xcb_intern_atom_reply(conn,
xcb_intern_atom_unchecked(conn,
0,
strlen(atom_name),
atom_name),
NULL);
free(atom_name);
if (atom_reply == NULL) {
ELOG("Failed to intern the WM_Sn atom, exiting\n");
return 1;
}
wm_sn = atom_reply->atom;
free(atom_reply);
/* Check if the selection is already owned */
xcb_get_selection_owner_reply_t *selection_reply =
xcb_get_selection_owner_reply(conn,
xcb_get_selection_owner(conn, wm_sn),
NULL);
if (selection_reply && selection_reply->owner != XCB_NONE && !replace_wm) {
ELOG("Another window manager is already running (WM_Sn is owned)");
return 1;
}
/* Become the selection owner */
xcb_create_window(conn,
root_screen->root_depth,
wm_sn_selection_owner, /* window id */
root_screen->root, /* parent */
-1, -1, 1, 1, /* geometry */
0, /* border width */
XCB_WINDOW_CLASS_INPUT_OUTPUT,
root_screen->root_visual,
0, NULL);
xcb_change_property(conn,
XCB_PROP_MODE_REPLACE,
wm_sn_selection_owner,
XCB_ATOM_WM_CLASS,
XCB_ATOM_STRING,
8,
(strlen("i3-WM_Sn") + 1) * 2,
"i3-WM_Sn\0i3-WM_Sn\0");
xcb_set_selection_owner(conn, wm_sn_selection_owner, wm_sn, last_timestamp);
if (selection_reply && selection_reply->owner != XCB_NONE) {
unsigned int usleep_time = 100000; /* 0.1 seconds */
int check_rounds = 150; /* Wait for a maximum of 15 seconds */
xcb_get_geometry_reply_t *geom_reply = NULL;
DLOG("waiting for old WM_Sn selection owner to exit");
do {
free(geom_reply);
usleep(usleep_time);
if (check_rounds-- == 0) {
ELOG("The old window manager is not exiting");
return 1;
}
geom_reply = xcb_get_geometry_reply(conn,
xcb_get_geometry(conn, selection_reply->owner),
NULL);
} while (geom_reply != NULL);
}
free(selection_reply);
/* Announce that we are the new owner */
/* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
* In order to properly initialize these bytes, we allocate 32 bytes even
* though we only need less for an xcb_client_message_event_t */
union {
xcb_client_message_event_t message;
char storage[32];
} event;
memset(&event, 0, sizeof(event));
event.message.response_type = XCB_CLIENT_MESSAGE;
event.message.window = root_screen->root;
event.message.format = 32;
event.message.type = A_MANAGER;
event.message.data.data32[0] = last_timestamp;
event.message.data.data32[1] = wm_sn;
event.message.data.data32[2] = wm_sn_selection_owner;
xcb_send_event(conn, 0, root_screen->root, XCB_EVENT_MASK_STRUCTURE_NOTIFY, event.storage);
}
xcb_void_cookie_t cookie;
cookie = xcb_change_window_attributes_checked(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK});
xcb_generic_error_t *error = xcb_request_check(conn, cookie);
if (error != NULL) {
ELOG("Another window manager seems to be running (X error %d)\n", error->error_code);
#ifdef I3_ASAN_ENABLED
__lsan_do_leak_check();
#endif
return 1;
}
xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
if (greply == NULL) {
ELOG("Could not get geometry of the root window, exiting\n");
return 1;
}
DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
xcursor_load_cursors();
/* Set a cursor for the root window (otherwise the root window will show no
cursor until the first client is launched). */
xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
const xcb_query_extension_reply_t *extreply;
extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
xkb_supported = extreply->present;
if (!extreply->present) {
DLOG("xkb is not present on this server\n");
} else {
DLOG("initializing xcb-xkb\n");
xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
xcb_xkb_select_events(conn,
XCB_XKB_ID_USE_CORE_KBD,
XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
0,
XCB_XKB_EVENT_TYPE_STATE_NOTIFY | XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_NEW_KEYBOARD_NOTIFY,
0xff,
0xff,
NULL);
/* Setting both, XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE and
* XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED, will lead to the
* X server sending us the full XKB state in KeyPress and KeyRelease:
* https://cgit.freedesktop.org/xorg/xserver/tree/xkb/xkbEvents.c?h=xorg-server-1.20.0#n927
*
* XCB_XKB_PER_CLIENT_FLAG_DETECTABLE_AUTO_REPEAT enable detectable autorepeat:
* https://www.x.org/releases/current/doc/kbproto/xkbproto.html#Detectable_Autorepeat
* This affects bindings using the --release flag: instead of getting multiple KeyRelease
* events we get only one event when the key is physically released by the user.
*/
const uint32_t mask = XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE |
XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED |
XCB_XKB_PER_CLIENT_FLAG_DETECTABLE_AUTO_REPEAT;
xcb_xkb_per_client_flags_reply_t *pcf_reply;
/* The last three parameters are unset because they are only relevant
* when using a feature called “automatic reset of boolean controls”:
* https://www.x.org/releases/X11R7.7/doc/kbproto/xkbproto.html#Automatic_Reset_of_Boolean_Controls
* */
pcf_reply = xcb_xkb_per_client_flags_reply(
conn,
xcb_xkb_per_client_flags(
conn,
XCB_XKB_ID_USE_CORE_KBD,
mask,
mask,
0 /* uint32_t ctrlsToChange */,
0 /* uint32_t autoCtrls */,
0 /* uint32_t autoCtrlsValues */),
NULL);
#define PCF_REPLY_ERROR(_value) \
do { \
if (pcf_reply == NULL || !(pcf_reply->value & (_value))) { \
ELOG("Could not set " #_value "\n"); \
} \
} while (0)
PCF_REPLY_ERROR(XCB_XKB_PER_CLIENT_FLAG_GRABS_USE_XKB_STATE);
PCF_REPLY_ERROR(XCB_XKB_PER_CLIENT_FLAG_LOOKUP_STATE_WHEN_GRABBED);
PCF_REPLY_ERROR(XCB_XKB_PER_CLIENT_FLAG_DETECTABLE_AUTO_REPEAT);
free(pcf_reply);
xkb_base = extreply->first_event;
}
/* Check for Shape extension. We want to handle input shapes which is
* introduced in 1.1. */
extreply = xcb_get_extension_data(conn, &xcb_shape_id);
if (extreply->present) {
shape_base = extreply->first_event;
xcb_shape_query_version_cookie_t cookie = xcb_shape_query_version(conn);
xcb_shape_query_version_reply_t *version =
xcb_shape_query_version_reply(conn, cookie, NULL);
shape_supported = version && version->minor_version >= 1;
free(version);
} else {
shape_supported = false;
}
if (!shape_supported) {
DLOG("shape 1.1 is not present on this server\n");
}
restore_connect();
property_handlers_init();
ewmh_setup_hints();
keysyms = xcb_key_symbols_alloc(conn);
xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
if (!load_keymap())
die("Could not load keymap\n");
translate_keysyms();
grab_all_keys(conn);
bool needs_tree_init = true;
if (layout_path != NULL) {
LOG("Trying to restore the layout from \"%s\".\n", layout_path);
needs_tree_init = !tree_restore(layout_path, greply);
if (delete_layout_path) {
unlink(layout_path);
const char *dir = dirname(layout_path);
/* possibly fails with ENOTEMPTY if there are files (or
* sockets) left. */
rmdir(dir);
}
}
if (needs_tree_init)
tree_init(greply);
free(greply);
/* Setup fake outputs for testing */
if (fake_outputs == NULL && config.fake_outputs != NULL)
fake_outputs = config.fake_outputs;
if (fake_outputs != NULL) {
fake_outputs_init(fake_outputs);
FREE(fake_outputs);
config.fake_outputs = NULL;
} else if (force_xinerama) {
/* Force Xinerama (for drivers which don't support RandR yet, esp. the
* nVidia binary graphics driver), when specified either in the config
* file or on command-line */
xinerama_init();
} else {
DLOG("Checking for XRandR...\n");
randr_init(&randr_base, disable_randr15 || config.disable_randr15);
}
/* We need to force disabling outputs which have been loaded from the
* layout file but are no longer active. This can happen if the output has
* been disabled in the short time between writing the restart layout file
* and restarting i3. See #2326. */
if (layout_path != NULL && randr_base > -1) {
Con *con;
TAILQ_FOREACH (con, &(croot->nodes_head), nodes) {
Output *output;
TAILQ_FOREACH (output, &outputs, outputs) {
if (output->active || strcmp(con->name, output_primary_name(output)) != 0)
continue;
/* This will correctly correlate the output with its content
* container. We need to make the connection to properly
* disable the output. */
if (output->con == NULL) {
output_init_con(output);
output->changed = false;
}
output->to_be_disabled = true;
randr_disable_output(output);
}
}
}
FREE(layout_path);
scratchpad_fix_resolution();
xcb_query_pointer_reply_t *pointerreply;
Output *output = NULL;
if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
ELOG("Could not query pointer position, using first screen\n");
} else {
DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
output = get_output_containing(pointerreply->root_x, pointerreply->root_y);
if (!output) {
ELOG("ERROR: No screen at (%d, %d), starting on the first screen\n",
pointerreply->root_x, pointerreply->root_y);
}
}
if (!output) {
output = get_first_output();
}
con_activate(con_descend_focused(output_get_content(output->con)));
free(pointerreply);
tree_render();
/* Listen to the IPC socket for clients */
struct ev_io *ipc_io = scalloc(1, sizeof(struct ev_io));
ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
ev_io_start(main_loop, ipc_io);
/* Chose a file name in /tmp/ based on the PID */
char *log_stream_socket_path = get_process_filename("log-stream-socket");
int log_socket = create_socket(log_stream_socket_path, ¤t_log_stream_socket_path);
free(log_stream_socket_path);
if (log_socket == -1) {
ELOG("Could not create the log socket, i3-dump-log -f will not work\n");
} else {
struct ev_io *log_io = scalloc(1, sizeof(struct ev_io));
ev_io_init(log_io, log_new_client, log_socket, EV_READ);
ev_io_start(main_loop, log_io);
}
/* Also handle the UNIX domain sockets passed via socket
* activation. The parameter 0 means "do not remove the
* environment variables", we need to be able to reexec. */
listen_fds = sd_listen_fds(0);
if (listen_fds < 0)
ELOG("socket activation: Error in sd_listen_fds\n");
else if (listen_fds == 0)
DLOG("socket activation: no sockets passed\n");
else {
int flags;
for (int fd = SD_LISTEN_FDS_START;
fd < (SD_LISTEN_FDS_START + listen_fds);
fd++) {
DLOG("socket activation: also listening on fd %d\n", fd);
/* sd_listen_fds() enables FD_CLOEXEC by default.
* However, we need to keep the file descriptors open for in-place
* restarting, therefore we explicitly disable FD_CLOEXEC. */
if ((flags = fcntl(fd, F_GETFD)) < 0 ||
fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
}
struct ev_io *ipc_io = scalloc(1, sizeof(struct ev_io));
ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
ev_io_start(main_loop, ipc_io);
}
}
{
const int restart_fd = parse_restart_fd();
if (restart_fd != -1) {
DLOG("serving restart fd %d", restart_fd);
ipc_client *client = ipc_new_client_on_fd(main_loop, restart_fd);
ipc_confirm_restart(client);
unsetenv("_I3_RESTART_FD");
}
}
/* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
x_set_i3_atoms();
ewmh_update_workarea();
/* Set the ewmh desktop properties. */
ewmh_update_desktop_properties();
struct ev_io *xcb_watcher = scalloc(1, sizeof(struct ev_io));
xcb_prepare = scalloc(1, sizeof(struct ev_prepare));
ev_io_init(xcb_watcher, xcb_got_event, xcb_get_file_descriptor(conn), EV_READ);
ev_io_start(main_loop, xcb_watcher);
ev_prepare_init(xcb_prepare, xcb_prepare_cb);
ev_prepare_start(main_loop, xcb_prepare);
xcb_flush(conn);
/* What follows is a fugly consequence of X11 protocol race conditions like
* the following: In an i3 in-place restart, i3 will reparent all windows
* to the root window, then exec() itself. In the new process, it calls
* manage_existing_windows. However, in case any application sent a
* generated UnmapNotify message to the WM (as GIMP does), this message
* will be handled by i3 *after* managing the window, thus i3 thinks the
* window just closed itself. In reality, the message was sent in the time
* period where i3 wasn’t running yet.
*
* To prevent this, we grab the server (disables processing of any other
* connections), then discard all pending events (since we didn’t do
* anything, there cannot be any meaningful responses), then ungrab the
* server. */
xcb_grab_server(conn);
{
xcb_aux_sync(conn);
xcb_generic_event_t *event;
while ((event = xcb_poll_for_event(conn)) != NULL) {
if (event->response_type == 0) {
free(event);
continue;
}
/* Strip off the highest bit (set if the event is generated) */
int type = (event->response_type & 0x7F);
/* We still need to handle MapRequests which are sent in the
* timespan starting from when we register as a window manager and
* this piece of code which drops events. */
if (type == XCB_MAP_REQUEST)
handle_event(type, event);
free(event);
}
manage_existing_windows(root);
}
xcb_ungrab_server(conn);
if (autostart) {
/* When the root's window background is set to NONE, that might mean
* that old content stays visible when a window is closed. That has
* unpleasant effect of "my terminal (does not seem to) close!".
*
* There does not seem to be an easy way to query for this problem, so
* we test for it: Open & close a window and check if the background is
* redrawn or the window contents stay visible.
*/
LOG("This is not an in-place restart, checking if a wallpaper is set.\n");
xcb_screen_t *root = xcb_aux_get_screen(conn, conn_screen);
if (is_background_set(conn, root)) {
LOG("A wallpaper is set, so no screenshot is necessary.\n");
} else {
LOG("No wallpaper set, copying root window contents to a pixmap\n");
set_screenshot_as_wallpaper(conn, root);
}
}
#if defined(__OpenBSD__)
if (pledge("stdio rpath wpath cpath proc exec unix", NULL) == -1)
err(EXIT_FAILURE, "pledge");
#endif
if (!disable_signalhandler)
setup_signal_handler();
else {
struct sigaction action;
action.sa_sigaction = handle_core_signal;
action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
sigemptyset(&action.sa_mask);
/* Catch all signals with default action "Core", see signal(7) */
if (sigaction(SIGQUIT, &action, NULL) == -1 ||
sigaction(SIGILL, &action, NULL) == -1 ||
sigaction(SIGABRT, &action, NULL) == -1 ||
sigaction(SIGFPE, &action, NULL) == -1 ||
sigaction(SIGSEGV, &action, NULL) == -1)
ELOG("Could not setup signal handler.\n");
}
setup_term_handlers();
/* Ignore SIGPIPE to survive errors when an IPC client disconnects
* while we are sending them a message */
signal(SIGPIPE, SIG_IGN);
/* Autostarting exec-lines */
if (autostart) {
while (!TAILQ_EMPTY(&autostarts)) {
struct Autostart *exec = TAILQ_FIRST(&autostarts);
LOG("auto-starting %s\n", exec->command);
start_application(exec->command, exec->no_startup_id);
FREE(exec->command);
TAILQ_REMOVE(&autostarts, exec, autostarts);
FREE(exec);
}
}
/* Autostarting exec_always-lines */
while (!TAILQ_EMPTY(&autostarts_always)) {
struct Autostart *exec_always = TAILQ_FIRST(&autostarts_always);
LOG("auto-starting (always!) %s\n", exec_always->command);
start_application(exec_always->command, exec_always->no_startup_id);
FREE(exec_always->command);
TAILQ_REMOVE(&autostarts_always, exec_always, autostarts_always);
FREE(exec_always);
}
/* Start i3bar processes for all configured bars */
Barconfig *barconfig;
TAILQ_FOREACH (barconfig, &barconfigs, configs) {
char *command = NULL;
sasprintf(&command, "%s %s --bar_id=%s --socket=\"%s\"",
barconfig->i3bar_command ? barconfig->i3bar_command : "exec i3bar",
barconfig->verbose ? "-V" : "",
barconfig->id, current_socketpath);
LOG("Starting bar process: %s\n", command);
start_application(command, true);
free(command);
}
/* Make sure to destroy the event loop to invoke the cleanup callbacks
* when calling exit() */
atexit(i3_exit);
sd_notify(1, "READY=1");
ev_loop(main_loop, 0);
}