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#undef I3__FILE__
#define I3__FILE__ "main.c"
/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
*
* main.c: Initialization, main loop
*
*/
#include <ev.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include "all.h"
#include "sd-daemon.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;
static int xkb_event_base;
int xkb_current_group;
extern Con *focused;
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;
/* 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_visualid_t visual_id;
xcb_colormap_t colormap;
struct ev_loop *main_loop;
xcb_key_symbols_t *keysyms;
/* Those are our connections to X11 for use with libXcursor and XKB */
Display *xlibdpy, *xkbdpy;
/* The list of key bindings */
struct bindings_head *bindings;
/* 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 xcursor_supported = true;
bool xkb_supported = true;
/* This will be set to true when -C is used so that functions can behave
* slightly differently. We don’t want i3-nagbar to be started when validating
* the config, for example. */
bool only_check_config = false;
/*
* This callback is only a dummy, see xcb_prepare_cb and xcb_check_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 and xcb_check_cb are used */
}
/*
* Flush before blocking (and waiting for new events)
*
*/
static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
xcb_flush(conn);
}
/*
* Instead of polling the X connection socket we leave this to
* xcb_poll_for_event() which knows better than we can ever know.
*
*/
static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
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);
}
}
/*
* When using xmodmap to change the keyboard mapping, this event
* is only sent via XKB. Therefore, we need this special handler.
*
*/
static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
DLOG("Handling XKB event\n");
XkbEvent ev;
/* When using xmodmap, every change (!) gets an own event.
* Therefore, we just read all events and only handle the
* mapping_notify once. */
bool mapping_changed = false;
while (XPending(xkbdpy)) {
XNextEvent(xkbdpy, (XEvent*)&ev);
/* While we should never receive a non-XKB event,
* better do sanity checking */
if (ev.type != xkb_event_base)
continue;
if (ev.any.xkb_type == XkbMapNotify) {
mapping_changed = true;
continue;
}
if (ev.any.xkb_type != XkbStateNotify) {
ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
continue;
}
/* See The XKB Extension: Library Specification, section 14.1 */
/* We check if the current group (each group contains
* two levels) has been changed. Mode_switch activates
* group XkbGroup2Index */
if (xkb_current_group == ev.state.group)
continue;
xkb_current_group = ev.state.group;
if (ev.state.group == XkbGroup2Index) {
DLOG("Mode_switch enabled\n");
grab_all_keys(conn, true);
}
if (ev.state.group == XkbGroup1Index) {
DLOG("Mode_switch disabled\n");
ungrab_all_keys(conn);
grab_all_keys(conn, false);
}
}
if (!mapping_changed)
return;
DLOG("Keyboard mapping changed, updating keybindings\n");
xcb_key_symbols_free(keysyms);
keysyms = xcb_key_symbols_alloc(conn);
xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
ungrab_all_keys(conn);
DLOG("Re-grabbing...\n");
translate_keysyms();
grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
DLOG("Done\n");
}
/*
* Exit handler which destroys the main_loop. Will trigger cleanup handlers.
*
*/
static void i3_exit(void) {
/* 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
if (*shmlogname != '\0') {
fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
fflush(stderr);
shm_unlink(shmlogname);
}
}
/*
* (One-shot) Handler for all signals with default action "Term", see signal(7)
*
* Unlinks the SHM log and re-raises the signal.
*
*/
static void handle_signal(int sig, siginfo_t *info, void *data) {
fprintf(stderr, "Received signal %d, terminating\n", sig);
if (*shmlogname != '\0') {
fprintf(stderr, "Closing SHM log \"%s\"\n", shmlogname);
shm_unlink(shmlogname);
}
fflush(stderr);
raise(sig);
}
int main(int argc, char *argv[]) {
/* Keep a symbol pointing to the I3_VERSION string constant so that we have
* it in gdb backtraces. */
const char *i3_version __attribute__ ((unused)) = I3_VERSION;
char *override_configpath = NULL;
bool autostart = true;
char *layout_path = NULL;
bool delete_layout_path = false;
bool force_xinerama = false;
char *fake_outputs = NULL;
bool disable_signalhandler = 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-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},
{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 non-release builds, disable SHM logging by default. */
shmlog_size = (is_debug_build() ? 25 * 1024 * 1024 : 0);
start_argv = argv;
while ((opt = getopt_long(argc, argv, "c:CvmaL:hld:V", 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 " I3_VERSION " © 2009-2012 Michael Stapelberg and contributors\n");
exit(EXIT_SUCCESS);
break;
case 'm':
printf("Binary i3 version: " I3_VERSION " © 2009-2012 Michael Stapelberg and contributors\n");
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 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-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");
if (socket_path) {
printf("%s\n", 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;
}
/* 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"
"\tnvidia closed source driver which does not 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, "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(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 (!only_check_config && 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");
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);
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_COMMAND,
(uint8_t*)payload) == -1)
err(EXIT_FAILURE, "IPC: write()");
uint32_t reply_length;
uint8_t *reply;
int ret;
if ((ret = ipc_recv_message(sockfd, I3_IPC_MESSAGE_TYPE_COMMAND,
&reply_length, &reply)) != 0) {
if (ret == -1)
err(EXIT_FAILURE, "IPC: read()");
return 1;
}
printf("%.*s\n", reply_length, 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. */
char cwd[PATH_MAX];
LOG("CORE DUMPS: You are running a development version of i3, so coredumps were automatically enabled (ulimit -c unlimited).\n");
if (getcwd(cwd, sizeof(cwd)) != 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', sizeof(cwd));
if (read(patternfd, cwd, sizeof(cwd)) > 0)
/* a trailing newline is included in cwd */
LOG("CORE DUMPS: Your core_pattern is: %s", cwd);
close(patternfd);
}
}
LOG("i3 " I3_VERSION " starting\n");
conn = xcb_connect(NULL, &conn_screen);
if (xcb_connection_has_error(conn))
errx(EXIT_FAILURE, "Cannot open display\n");
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;
/* By default, we use the same depth and visual as the root window, which
* usually is TrueColor (24 bit depth) and the corresponding visual.
* However, we also check if a 32 bit depth and visual are available (for
* transparency) and use it if so. */
root_depth = root_screen->root_depth;
visual_id = root_screen->root_visual;
colormap = root_screen->default_colormap;
DLOG("root_depth = %d, visual_id = 0x%08x.\n", root_depth, visual_id);
xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
load_configuration(conn, override_configpath, false);
if (only_check_config) {
LOG("Done checking configuration file. Exiting.\n");
exit(0);
}
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);
}
uint32_t mask = XCB_CW_EVENT_MASK;
uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
projector), the root window gets a
ConfigureNotify */
XCB_EVENT_MASK_POINTER_MOTION |
XCB_EVENT_MASK_PROPERTY_CHANGE |
XCB_EVENT_MASK_ENTER_WINDOW };
xcb_void_cookie_t cookie;
cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
check_error(conn, cookie, "Another window manager seems to be running");
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);
/* 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);
#include "atoms.xmacro"
#undef xmacro
/* Initialize the Xlib connection */
xlibdpy = xkbdpy = XOpenDisplay(NULL);
/* Try to load the X cursors and initialize the XKB extension */
if (xlibdpy == NULL) {
ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
xcursor_supported = false;
xkb_supported = false;
} else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
return 1;
} else {
xcursor_load_cursors();
/*init_xkb();*/
}
/* Set a cursor for the root window (otherwise the root window will show no
cursor until the first client is launched). */
if (xcursor_supported)
xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
if (xkb_supported) {
int errBase,
major = XkbMajorVersion,
minor = XkbMinorVersion;
if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
return 1;
}
int i1;
if (!XkbQueryExtension(xkbdpy,&i1,&xkb_event_base,&errBase,&major,&minor)) {
fprintf(stderr, "XKB not supported by X-server\n");
return 1;
}
/* end of ugliness */
if (!XkbSelectEvents(xkbdpy, XkbUseCoreKbd,
XkbMapNotifyMask | XkbStateNotifyMask,
XkbMapNotifyMask | XkbStateNotifyMask)) {
fprintf(stderr, "Could not set XKB event mask\n");
return 1;
}
}
/* 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);
#include "atoms.xmacro"
#undef xmacro
property_handlers_init();
ewmh_setup_hints();
keysyms = xcb_key_symbols_alloc(conn);
xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
translate_keysyms();
grab_all_keys(conn, false);
bool needs_tree_init = true;
if (layout_path) {
LOG("Trying to restore the layout from %s...", layout_path);
needs_tree_init = !tree_restore(layout_path, greply);
if (delete_layout_path)
unlink(layout_path);
free(layout_path);
}
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 || config.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);
}
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);
output = get_first_output();
}
con_focus(con_descend_focused(output_get_content(output->con)));
}
tree_render();
/* Create the UNIX domain socket for IPC */
int ipc_socket = ipc_create_socket(config.ipc_socket_path);
if (ipc_socket == -1) {
ELOG("Could not create the IPC socket, IPC disabled\n");
} else {
free(config.ipc_socket_path);
struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
ev_io_init(ipc_io, ipc_new_client, ipc_socket, EV_READ);
ev_io_start(main_loop, ipc_io);
}
/* Also handle the UNIX domain sockets passed via socket activation. The
* parameter 1 means "remove the environment variables", we don’t want to
* pass these to child processes. */
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(sizeof(struct ev_io));
ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
ev_io_start(main_loop, ipc_io);
}
}
/* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
x_set_i3_atoms();
struct ev_io *xcb_watcher = scalloc(sizeof(struct ev_io));
struct ev_io *xkb = scalloc(sizeof(struct ev_io));
struct ev_check *xcb_check = scalloc(sizeof(struct ev_check));
struct ev_prepare *xcb_prepare = scalloc(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);
if (xkb_supported) {
ev_io_init(xkb, xkb_got_event, ConnectionNumber(xkbdpy), EV_READ);
ev_io_start(main_loop, xkb);
/* Flush the buffer so that libev can properly get new events */
XFlush(xkbdpy);
}
ev_check_init(xcb_check, xcb_check_cb);
ev_check_start(main_loop, xcb_check);
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) {
free(event);
}
manage_existing_windows(root);
}
xcb_ungrab_server(conn);
struct sigaction action;
action.sa_sigaction = handle_signal;
action.sa_flags = SA_NODEFER | SA_RESETHAND | SA_SIGINFO;
sigemptyset(&action.sa_mask);
if (!disable_signalhandler)
setup_signal_handler();
else {
/* 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");
}
/* Catch all signals with default action "Term", see signal(7) */
if (sigaction(SIGHUP, &action, NULL) == -1 ||
sigaction(SIGINT, &action, NULL) == -1 ||
sigaction(SIGALRM, &action, NULL) == -1 ||
sigaction(SIGUSR1, &action, NULL) == -1 ||
sigaction(SIGUSR2, &action, NULL) == -1)
ELOG("Could not setup signal handler");
/* Ignore SIGPIPE to survive errors when an IPC client disconnects
* while we are sending him a message */
signal(SIGPIPE, SIG_IGN);
/* Autostarting exec-lines */
if (autostart) {
struct Autostart *exec;
TAILQ_FOREACH(exec, &autostarts, autostarts) {
LOG("auto-starting %s\n", exec->command);
start_application(exec->command, exec->no_startup_id);
}
}
/* Autostarting exec_always-lines */
struct Autostart *exec_always;
TAILQ_FOREACH(exec_always, &autostarts_always, autostarts_always) {
LOG("auto-starting (always!) %s\n", exec_always->command);
start_application(exec_always->command, exec_always->no_startup_id);
}
/* Start i3bar processes for all configured bars */
Barconfig *barconfig;
TAILQ_FOREACH(barconfig, &barconfigs, configs) {
char *command = NULL;
sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
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 cleeanup callbacks
* when calling exit() */
atexit(i3_exit);
ev_loop(main_loop, 0);
}
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