2 #define I3__FILE__ "startup.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
9 * startup.c: Startup notification code. Ensures a startup notification context
10 * is setup when launching applications. We store the current
11 * workspace to open windows in that startup notification context on
12 * the appropriate workspace.
16 #include "sd-daemon.h"
18 #include <sys/types.h>
21 #define SN_API_NOT_YET_FROZEN 1
22 #include <libsn/sn-launcher.h>
24 static TAILQ_HEAD(startup_sequence_head, Startup_Sequence) startup_sequences =
25 TAILQ_HEAD_INITIALIZER(startup_sequences);
28 * After 60 seconds, a timeout will be triggered for each startup sequence.
30 * The timeout will just trigger completion of the sequence, so the normal
31 * completion process takes place (startup_monitor_event will free it).
34 static void startup_timeout(EV_P_ ev_timer *w, int revents) {
35 const char *id = sn_launcher_context_get_startup_id(w->data);
36 DLOG("Timeout for startup sequence %s\n", id);
38 struct Startup_Sequence *current, *sequence = NULL;
39 TAILQ_FOREACH(current, &startup_sequences, sequences) {
40 if (strcmp(current->id, id) != 0)
47 /* Unref the context (for the timeout itself, see start_application) */
48 sn_launcher_context_unref(w->data);
51 DLOG("Sequence already deleted, nevermind.\n");
55 /* Complete the startup sequence, will trigger its deletion. */
56 sn_launcher_context_complete(w->data);
61 * Some applications (such as Firefox) mark a startup sequence as completed
62 * *before* they even map a window. Therefore, we cannot entirely delete the
63 * startup sequence once it’s marked as complete. Instead, we’ll mark it for
64 * deletion in 30 seconds and use that chance to delete old sequences.
66 * This function returns the number of active (!) startup notifications, that
67 * is, those which are not marked for deletion yet. This is used for changing
68 * the root window cursor.
71 static int _prune_startup_sequences(void) {
72 time_t current_time = time(NULL);
73 int active_sequences = 0;
75 /* Traverse the list and delete everything which was marked for deletion 30
76 * seconds ago or earlier. */
77 struct Startup_Sequence *current, *next;
78 for (next = TAILQ_FIRST(&startup_sequences);
79 next != TAILQ_END(&startup_sequences);
82 next = TAILQ_NEXT(next, sequences);
84 if (current->delete_at == 0) {
89 if (current_time <= current->delete_at)
92 startup_sequence_delete(current);
95 return active_sequences;
100 * Deletes a startup sequence, ignoring whether its timeout has elapsed.
101 * Useful when e.g. a window is moved between workspaces and its children
102 * shouldn't spawn on the original workspace.
105 void startup_sequence_delete(struct Startup_Sequence *sequence) {
106 assert(sequence != NULL);
107 DLOG("Deleting startup sequence %s, delete_at = %ld, current_time = %ld\n",
108 sequence->id, sequence->delete_at, time(NULL));
110 /* Unref the context, will be free()d */
111 sn_launcher_context_unref(sequence->context);
113 /* Delete our internal sequence */
114 TAILQ_REMOVE(&startup_sequences, sequence, sequences);
117 free(sequence->workspace);
122 * Starts the given application by passing it through a shell. We use double fork
123 * to avoid zombie processes. As the started application’s parent exits (immediately),
124 * the application is reparented to init (process-id 1), which correctly handles
125 * childs, so we don’t have to do it :-).
127 * The shell is determined by looking for the SHELL environment variable. If it
128 * does not exist, /bin/sh is used.
130 * The no_startup_id flag determines whether a startup notification context
131 * (and ID) should be created, which is the default and encouraged behavior.
134 void start_application(const char *command, bool no_startup_id) {
135 SnLauncherContext *context;
137 if (!no_startup_id) {
138 /* Create a startup notification context to monitor the progress of this
140 context = sn_launcher_context_new(sndisplay, conn_screen);
141 sn_launcher_context_set_name(context, "i3");
142 sn_launcher_context_set_description(context, "exec command in i3");
143 /* Chop off everything starting from the first space (if there are any
144 * spaces in the command), since we don’t want the parameters. */
145 char *first_word = sstrdup(command);
146 char *space = strchr(first_word, ' ');
149 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
152 /* Trigger a timeout after 60 seconds */
153 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer));
154 ev_timer_init(timeout, startup_timeout, 60.0, 0.);
155 timeout->data = context;
156 ev_timer_start(main_loop, timeout);
158 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
160 /* Save the ID and current workspace in our internal list of startup
162 Con *ws = con_get_workspace(focused);
163 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence));
164 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context));
165 sequence->workspace = sstrdup(ws->name);
166 sequence->context = context;
167 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences);
169 /* Increase the refcount once (it starts with 1, so it will be 2 now) for
170 * the timeout. Even if the sequence gets completed, the timeout still
171 * needs the context (but will unref it then) */
172 sn_launcher_context_ref(context);
175 LOG("executing: %s\n", command);
179 setrlimit(RLIMIT_CORE, &original_rlimit_core);
180 /* Close all socket activation file descriptors explicitly, we disabled
181 * FD_CLOEXEC to keep them open when restarting i3. */
182 for (int fd = SD_LISTEN_FDS_START;
183 fd < (SD_LISTEN_FDS_START + listen_fds);
187 unsetenv("LISTEN_PID");
188 unsetenv("LISTEN_FDS");
190 /* Setup the environment variable(s) */
192 sn_launcher_context_setup_child_process(context);
194 /* Stores the path of the shell */
195 static const char *shell = NULL;
198 if ((shell = getenv("SHELL")) == NULL)
201 /* This is the child */
202 execl(shell, shell, "-c", command, (void*)NULL);
209 if (!no_startup_id) {
210 /* Change the pointer of the root window to indicate progress */
211 if (xcursor_supported)
212 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH);
213 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH);
218 * Called by libstartup-notification when something happens
221 void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
222 SnStartupSequence *snsequence;
224 snsequence = sn_monitor_event_get_startup_sequence(event);
226 /* Get the corresponding internal startup sequence */
227 const char *id = sn_startup_sequence_get_id(snsequence);
228 struct Startup_Sequence *current, *sequence = NULL;
229 TAILQ_FOREACH(current, &startup_sequences, sequences) {
230 if (strcmp(current->id, id) != 0)
238 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id);
242 switch (sn_monitor_event_get_type(event)) {
243 case SN_MONITOR_EVENT_COMPLETED:
244 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence));
246 /* Mark the given sequence for deletion in 30 seconds. */
247 time_t current_time = time(NULL);
248 sequence->delete_at = current_time + 30;
249 DLOG("Will delete startup sequence %s at timestamp %ld\n",
250 sequence->id, sequence->delete_at);
252 if (_prune_startup_sequences() == 0) {
253 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n");
254 /* Change the pointer of the root window to indicate progress */
255 if (xcursor_supported)
256 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
257 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
267 * Gets the stored startup sequence for the _NET_STARTUP_ID of a given window.
270 struct Startup_Sequence *startup_sequence_get(i3Window *cwindow,
271 xcb_get_property_reply_t *startup_id_reply, bool ignore_mapped_leader) {
272 /* The _NET_STARTUP_ID is only needed during this function, so we get it
273 * here and don’t save it in the 'cwindow'. */
274 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
275 FREE(startup_id_reply);
276 DLOG("No _NET_STARTUP_ID set on window 0x%08x\n", cwindow->id);
277 if (cwindow->leader == XCB_NONE)
280 /* This is a special case that causes the leader's startup sequence
281 * to only be returned if it has never been mapped, useful primarily
282 * when trying to delete a sequence.
284 * It's generally inappropriate to delete a leader's sequence when
285 * moving a child window, but if the leader has no container, it's
286 * likely permanently unmapped and the child is the "real" window. */
287 if (ignore_mapped_leader && con_by_window_id(cwindow->leader) != NULL) {
288 DLOG("Ignoring leader window 0x%08x\n", cwindow->leader);
292 DLOG("Checking leader window 0x%08x\n", cwindow->leader);
294 xcb_get_property_cookie_t cookie;
296 cookie = xcb_get_property(conn, false, cwindow->leader,
297 A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
298 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
300 if (startup_id_reply == NULL ||
301 xcb_get_property_value_length(startup_id_reply) == 0) {
302 FREE(startup_id_reply);
303 DLOG("No _NET_STARTUP_ID set on the leader either\n");
309 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply),
310 (char*)xcb_get_property_value(startup_id_reply)) == -1) {
311 perror("asprintf()");
312 DLOG("Could not get _NET_STARTUP_ID\n");
313 free(startup_id_reply);
317 struct Startup_Sequence *current, *sequence = NULL;
318 TAILQ_FOREACH(current, &startup_sequences, sequences) {
319 if (strcmp(current->id, startup_id) != 0)
327 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id);
329 free(startup_id_reply);
334 free(startup_id_reply);
340 * Checks if the given window belongs to a startup notification by checking if
341 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s
344 * If so, returns the workspace on which the startup was initiated.
345 * Returns NULL otherwise.
348 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) {
349 struct Startup_Sequence *sequence = startup_sequence_get(cwindow, startup_id_reply, false);
350 if (sequence == NULL)
353 /* If the startup sequence's time span has elapsed, delete it. */
354 time_t current_time = time(NULL);
355 if (sequence->delete_at > 0 && current_time > sequence->delete_at) {
356 DLOG("Deleting expired startup sequence %s\n", sequence->id);
357 startup_sequence_delete(sequence);
361 return sequence->workspace;