666 lines
24 KiB
C
666 lines
24 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* main.c: Initialization, main loop
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*
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*/
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#include <ev.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include "all.h"
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#include "sd-daemon.h"
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static int xkb_event_base;
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int xkb_current_group;
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extern Con *focused;
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char **start_argv;
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xcb_connection_t *conn;
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/* The screen (0 when you are using DISPLAY=:0) of the connection 'conn' */
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int conn_screen;
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/* Display handle for libstartup-notification */
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SnDisplay *sndisplay;
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/* The last timestamp we got from X11 (timestamps are included in some events
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* and are used for some things, like determining a unique ID in startup
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* notification). */
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xcb_timestamp_t last_timestamp = XCB_CURRENT_TIME;
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xcb_screen_t *root_screen;
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xcb_window_t root;
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uint8_t root_depth;
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struct ev_loop *main_loop;
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xcb_key_symbols_t *keysyms;
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/* Those are our connections to X11 for use with libXcursor and XKB */
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Display *xlibdpy, *xkbdpy;
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/* The list of key bindings */
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struct bindings_head *bindings;
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/* The list of exec-lines */
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struct autostarts_head autostarts = TAILQ_HEAD_INITIALIZER(autostarts);
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/* The list of exec_always lines */
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struct autostarts_always_head autostarts_always = TAILQ_HEAD_INITIALIZER(autostarts_always);
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/* The list of assignments */
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struct assignments_head assignments = TAILQ_HEAD_INITIALIZER(assignments);
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/* The list of workspace assignments (which workspace should end up on which
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* output) */
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struct ws_assignments_head ws_assignments = TAILQ_HEAD_INITIALIZER(ws_assignments);
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/* We hope that those are supported and set them to true */
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bool xcursor_supported = true;
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bool xkb_supported = true;
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/* This will be set to true when -C is used so that functions can behave
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* slightly differently. We don’t want i3-nagbar to be started when validating
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* the config, for example. */
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bool only_check_config = false;
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/*
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* This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
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* See also man libev(3): "ev_prepare" and "ev_check" - customise your event loop
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*
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*/
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static void xcb_got_event(EV_P_ struct ev_io *w, int revents) {
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/* empty, because xcb_prepare_cb and xcb_check_cb are used */
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}
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/*
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* Flush before blocking (and waiting for new events)
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*
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*/
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static void xcb_prepare_cb(EV_P_ ev_prepare *w, int revents) {
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xcb_flush(conn);
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}
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/*
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* Instead of polling the X connection socket we leave this to
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* xcb_poll_for_event() which knows better than we can ever know.
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*
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*/
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static void xcb_check_cb(EV_P_ ev_check *w, int revents) {
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xcb_generic_event_t *event;
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while ((event = xcb_poll_for_event(conn)) != NULL) {
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if (event->response_type == 0) {
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if (event_is_ignored(event->sequence, 0))
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DLOG("Expected X11 Error received for sequence %x\n", event->sequence);
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else {
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xcb_generic_error_t *error = (xcb_generic_error_t*)event;
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ELOG("X11 Error received! sequence 0x%x, error_code = %d\n",
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error->sequence, error->error_code);
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}
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free(event);
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continue;
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}
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/* Strip off the highest bit (set if the event is generated) */
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int type = (event->response_type & 0x7F);
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handle_event(type, event);
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free(event);
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}
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}
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/*
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* When using xmodmap to change the keyboard mapping, this event
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* is only sent via XKB. Therefore, we need this special handler.
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*
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*/
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static void xkb_got_event(EV_P_ struct ev_io *w, int revents) {
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DLOG("Handling XKB event\n");
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XkbEvent ev;
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/* When using xmodmap, every change (!) gets an own event.
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* Therefore, we just read all events and only handle the
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* mapping_notify once. */
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bool mapping_changed = false;
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while (XPending(xkbdpy)) {
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XNextEvent(xkbdpy, (XEvent*)&ev);
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/* While we should never receive a non-XKB event,
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* better do sanity checking */
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if (ev.type != xkb_event_base)
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continue;
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if (ev.any.xkb_type == XkbMapNotify) {
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mapping_changed = true;
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continue;
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}
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if (ev.any.xkb_type != XkbStateNotify) {
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ELOG("Unknown XKB event received (type %d)\n", ev.any.xkb_type);
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continue;
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}
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/* See The XKB Extension: Library Specification, section 14.1 */
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/* We check if the current group (each group contains
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* two levels) has been changed. Mode_switch activates
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* group XkbGroup2Index */
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if (xkb_current_group == ev.state.group)
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continue;
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xkb_current_group = ev.state.group;
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if (ev.state.group == XkbGroup2Index) {
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DLOG("Mode_switch enabled\n");
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grab_all_keys(conn, true);
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}
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if (ev.state.group == XkbGroup1Index) {
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DLOG("Mode_switch disabled\n");
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ungrab_all_keys(conn);
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grab_all_keys(conn, false);
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}
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}
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if (!mapping_changed)
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return;
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DLOG("Keyboard mapping changed, updating keybindings\n");
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xcb_key_symbols_free(keysyms);
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keysyms = xcb_key_symbols_alloc(conn);
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xcb_get_numlock_mask(conn);
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ungrab_all_keys(conn);
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DLOG("Re-grabbing...\n");
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translate_keysyms();
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grab_all_keys(conn, (xkb_current_group == XkbGroup2Index));
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DLOG("Done\n");
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}
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/*
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* Exit handler which destroys the main_loop. Will trigger cleanup handlers.
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*
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*/
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static void i3_exit() {
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/* We need ev >= 4 for the following code. Since it is not *that* important (it
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* only makes sure that there are no i3-nagbar instances left behind) we still
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* support old systems with libev 3. */
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#if EV_VERSION_MAJOR >= 4
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ev_loop_destroy(main_loop);
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#endif
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}
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int main(int argc, char *argv[]) {
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char *override_configpath = NULL;
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bool autostart = true;
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char *layout_path = NULL;
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bool delete_layout_path = false;
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bool force_xinerama = false;
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bool disable_signalhandler = false;
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static struct option long_options[] = {
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{"no-autostart", no_argument, 0, 'a'},
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{"config", required_argument, 0, 'c'},
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{"version", no_argument, 0, 'v'},
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{"help", no_argument, 0, 'h'},
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{"layout", required_argument, 0, 'L'},
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{"restart", required_argument, 0, 0},
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{"force-xinerama", no_argument, 0, 0},
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{"force_xinerama", no_argument, 0, 0},
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{"disable-signalhandler", no_argument, 0, 0},
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{"get-socketpath", no_argument, 0, 0},
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{"get_socketpath", no_argument, 0, 0},
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{0, 0, 0, 0}
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};
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int option_index = 0, opt;
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setlocale(LC_ALL, "");
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/* Disable output buffering to make redirects in .xsession actually useful for debugging */
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if (!isatty(fileno(stdout)))
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setbuf(stdout, NULL);
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srand(time(NULL));
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init_logging();
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start_argv = argv;
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while ((opt = getopt_long(argc, argv, "c:CvaL:hld:V", long_options, &option_index)) != -1) {
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switch (opt) {
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case 'a':
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LOG("Autostart disabled using -a\n");
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autostart = false;
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break;
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case 'L':
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FREE(layout_path);
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layout_path = sstrdup(optarg);
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delete_layout_path = false;
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break;
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case 'c':
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FREE(override_configpath);
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override_configpath = sstrdup(optarg);
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break;
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case 'C':
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LOG("Checking configuration file only (-C)\n");
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only_check_config = true;
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break;
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case 'v':
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printf("i3 version " I3_VERSION " © 2009-2011 Michael Stapelberg and contributors\n");
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exit(EXIT_SUCCESS);
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case 'V':
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set_verbosity(true);
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break;
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case 'd':
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LOG("Enabling debug loglevel %s\n", optarg);
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add_loglevel(optarg);
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break;
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case 'l':
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/* DEPRECATED, ignored for the next 3 versions (3.e, 3.f, 3.g) */
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break;
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case 0:
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if (strcmp(long_options[option_index].name, "force-xinerama") == 0 ||
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strcmp(long_options[option_index].name, "force_xinerama") == 0) {
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force_xinerama = true;
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ELOG("Using Xinerama instead of RandR. This option should be "
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"avoided at all cost because it does not refresh the list "
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"of screens, so you cannot configure displays at runtime. "
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"Please check if your driver really does not support RandR "
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"and disable this option as soon as you can.\n");
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break;
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} else if (strcmp(long_options[option_index].name, "disable-signalhandler") == 0) {
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disable_signalhandler = true;
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break;
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} else if (strcmp(long_options[option_index].name, "get-socketpath") == 0 ||
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strcmp(long_options[option_index].name, "get_socketpath") == 0) {
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char *socket_path = socket_path_from_x11();
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if (socket_path) {
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printf("%s\n", socket_path);
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return 0;
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}
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return 1;
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} else if (strcmp(long_options[option_index].name, "restart") == 0) {
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FREE(layout_path);
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layout_path = sstrdup(optarg);
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delete_layout_path = true;
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break;
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}
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/* fall-through */
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default:
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fprintf(stderr, "Usage: %s [-c configfile] [-d loglevel] [-a] [-v] [-V] [-C]\n", argv[0]);
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fprintf(stderr, "\n");
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fprintf(stderr, "\t-a disable autostart ('exec' lines in config)\n");
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fprintf(stderr, "\t-c <file> use the provided configfile instead\n");
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fprintf(stderr, "\t-C validate configuration file and exit\n");
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fprintf(stderr, "\t-d <level> enable debug output with the specified loglevel\n");
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fprintf(stderr, "\t-L <file> path to the serialized layout during restarts\n");
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fprintf(stderr, "\t-v display version and exit\n");
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fprintf(stderr, "\t-V enable verbose mode\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "\t--force-xinerama\n"
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"\tUse Xinerama instead of RandR.\n"
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"\tThis option should only be used if you are stuck with the\n"
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"\tnvidia closed source driver which does not support RandR.\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "\t--get-socketpath\n"
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"\tRetrieve the i3 IPC socket path from X11, print it, then exit.\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "If you pass plain text arguments, i3 will interpret them as a command\n"
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"to send to a currently running i3 (like i3-msg). This allows you to\n"
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"use nice and logical commands, such as:\n"
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"\n"
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"\ti3 border none\n"
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"\ti3 floating toggle\n"
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"\ti3 kill window\n"
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"\n");
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exit(EXIT_FAILURE);
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}
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}
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/* If the user passes more arguments, we act like i3-msg would: Just send
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* the arguments as an IPC message to i3. This allows for nice semantic
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* commands such as 'i3 border none'. */
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if (optind < argc) {
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/* We enable verbose mode so that the user knows what’s going on.
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* This should make it easier to find mistakes when the user passes
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* arguments by mistake. */
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set_verbosity(true);
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LOG("Additional arguments passed. Sending them as a command to i3.\n");
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char *payload = NULL;
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while (optind < argc) {
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if (!payload) {
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payload = sstrdup(argv[optind]);
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} else {
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char *both;
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sasprintf(&both, "%s %s", payload, argv[optind]);
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free(payload);
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payload = both;
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}
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optind++;
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}
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LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
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char *socket_path = socket_path_from_x11();
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if (!socket_path) {
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ELOG("Could not get i3 IPC socket path\n");
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return 1;
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}
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int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
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if (sockfd == -1)
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err(EXIT_FAILURE, "Could not create socket");
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struct sockaddr_un addr;
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memset(&addr, 0, sizeof(struct sockaddr_un));
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addr.sun_family = AF_LOCAL;
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strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
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if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
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err(EXIT_FAILURE, "Could not connect to i3");
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if (ipc_send_message(sockfd, strlen(payload), I3_IPC_MESSAGE_TYPE_COMMAND,
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(uint8_t*)payload) == -1)
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err(EXIT_FAILURE, "IPC: write()");
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uint32_t reply_length;
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uint8_t *reply;
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int ret;
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if ((ret = ipc_recv_message(sockfd, I3_IPC_MESSAGE_TYPE_COMMAND,
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&reply_length, &reply)) != 0) {
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if (ret == -1)
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err(EXIT_FAILURE, "IPC: read()");
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return 1;
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}
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printf("%.*s\n", reply_length, reply);
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return 0;
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}
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LOG("i3 (tree) version " I3_VERSION " starting\n");
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conn = xcb_connect(NULL, &conn_screen);
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if (xcb_connection_has_error(conn))
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errx(EXIT_FAILURE, "Cannot open display\n");
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sndisplay = sn_xcb_display_new(conn, NULL, NULL);
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/* Initialize the libev event loop. This needs to be done before loading
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* the config file because the parser will install an ev_child watcher
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* for the nagbar when config errors are found. */
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main_loop = EV_DEFAULT;
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if (main_loop == NULL)
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die("Could not initialize libev. Bad LIBEV_FLAGS?\n");
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root_screen = xcb_aux_get_screen(conn, conn_screen);
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root = root_screen->root;
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root_depth = root_screen->root_depth;
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xcb_get_geometry_cookie_t gcookie = xcb_get_geometry(conn, root);
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xcb_query_pointer_cookie_t pointercookie = xcb_query_pointer(conn, root);
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load_configuration(conn, override_configpath, false);
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if (only_check_config) {
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LOG("Done checking configuration file. Exiting.\n");
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exit(0);
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}
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if (config.ipc_socket_path == NULL) {
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/* Fall back to a file name in /tmp/ based on the PID */
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if ((config.ipc_socket_path = getenv("I3SOCK")) == NULL)
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config.ipc_socket_path = get_process_filename("ipc-socket");
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else
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config.ipc_socket_path = sstrdup(config.ipc_socket_path);
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}
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uint32_t mask = XCB_CW_EVENT_MASK;
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uint32_t values[] = { XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
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XCB_EVENT_MASK_STRUCTURE_NOTIFY | /* when the user adds a screen (e.g. video
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projector), the root window gets a
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ConfigureNotify */
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XCB_EVENT_MASK_POINTER_MOTION |
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XCB_EVENT_MASK_PROPERTY_CHANGE |
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XCB_EVENT_MASK_ENTER_WINDOW };
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xcb_void_cookie_t cookie;
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cookie = xcb_change_window_attributes_checked(conn, root, mask, values);
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check_error(conn, cookie, "Another window manager seems to be running");
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xcb_get_geometry_reply_t *greply = xcb_get_geometry_reply(conn, gcookie, NULL);
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if (greply == NULL) {
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ELOG("Could not get geometry of the root window, exiting\n");
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return 1;
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}
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DLOG("root geometry reply: (%d, %d) %d x %d\n", greply->x, greply->y, greply->width, greply->height);
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/* Place requests for the atoms we need as soon as possible */
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#define xmacro(atom) \
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xcb_intern_atom_cookie_t atom ## _cookie = xcb_intern_atom(conn, 0, strlen(#atom), #atom);
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#include "atoms.xmacro"
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#undef xmacro
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/* Initialize the Xlib connection */
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xlibdpy = xkbdpy = XOpenDisplay(NULL);
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/* Try to load the X cursors and initialize the XKB extension */
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if (xlibdpy == NULL) {
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ELOG("ERROR: XOpenDisplay() failed, disabling libXcursor/XKB support\n");
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xcursor_supported = false;
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xkb_supported = false;
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} else if (fcntl(ConnectionNumber(xlibdpy), F_SETFD, FD_CLOEXEC) == -1) {
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ELOG("Could not set FD_CLOEXEC on xkbdpy\n");
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return 1;
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} else {
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xcursor_load_cursors();
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/*init_xkb();*/
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}
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/* Set a cursor for the root window (otherwise the root window will show no
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cursor until the first client is launched). */
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if (xcursor_supported)
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xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
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else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
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if (xkb_supported) {
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int errBase,
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major = XkbMajorVersion,
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minor = XkbMinorVersion;
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if (fcntl(ConnectionNumber(xkbdpy), F_SETFD, FD_CLOEXEC) == -1) {
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fprintf(stderr, "Could not set FD_CLOEXEC on xkbdpy\n");
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return 1;
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}
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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();
|
||
|
||
/* Set up the atoms we support */
|
||
xcb_atom_t supported_atoms[] = {
|
||
#define xmacro(atom) A_ ## atom,
|
||
#include "atoms.xmacro"
|
||
#undef xmacro
|
||
};
|
||
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, XCB_ATOM_ATOM, 32, 16, supported_atoms);
|
||
/* Set up the window manager’s name */
|
||
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &root);
|
||
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
|
||
|
||
keysyms = xcb_key_symbols_alloc(conn);
|
||
|
||
xcb_get_numlock_mask(conn);
|
||
|
||
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);
|
||
|
||
/* 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 */
|
||
if (force_xinerama || config.force_xinerama) {
|
||
xinerama_init();
|
||
} else {
|
||
DLOG("Checking for XRandR...\n");
|
||
randr_init(&randr_base);
|
||
}
|
||
|
||
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");
|
||
output = get_first_output();
|
||
} 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 */
|
||
int fds = sd_listen_fds(1);
|
||
if (fds < 0)
|
||
ELOG("socket activation: Error in sd_listen_fds\n");
|
||
else if (fds == 0)
|
||
DLOG("socket activation: no sockets passed\n");
|
||
else {
|
||
for (int fd = SD_LISTEN_FDS_START; fd < (SD_LISTEN_FDS_START + fds); fd++) {
|
||
DLOG("socket activation: also listening 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);
|
||
|
||
manage_existing_windows(root);
|
||
|
||
if (!disable_signalhandler)
|
||
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);
|
||
}
|
||
}
|
||
|
||
/* 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);
|
||
}
|
||
|
||
/* Start i3bar processes for all configured bars */
|
||
Barconfig *barconfig;
|
||
TAILQ_FOREACH(barconfig, &barconfigs, configs) {
|
||
char *command = NULL;
|
||
sasprintf(&command, "i3bar --bar_id=%s --socket=\"%s\"",
|
||
barconfig->id, current_socketpath);
|
||
LOG("Starting bar process: %s\n", command);
|
||
start_application(command);
|
||
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);
|
||
}
|