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 completede
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 _delete_startup_sequence(struct Startup_Sequence *sequence) {
72 time_t current_time = time(NULL);
73 int active_sequences = 0;
75 /* Mark the given sequence for deletion in 30 seconds. */
76 sequence->delete_at = current_time + 30;
77 DLOG("Will delete startup sequence %s at timestamp %d\n",
78 sequence->id, sequence->delete_at);
80 /* Traverse the list and delete everything which was marked for deletion 30
81 * seconds ago or earlier. */
82 struct Startup_Sequence *current, *next;
83 for (next = TAILQ_FIRST(&startup_sequences);
84 next != TAILQ_END(&startup_sequences);
87 next = TAILQ_NEXT(next, sequences);
89 if (current->delete_at == 0) {
94 if (current_time <= current->delete_at)
97 DLOG("Deleting startup sequence %s, delete_at = %d, current_time = %d\n",
98 current->id, current->delete_at, current_time);
100 /* Unref the context, will be free()d */
101 sn_launcher_context_unref(current->context);
103 /* Delete our internal sequence */
104 TAILQ_REMOVE(&startup_sequences, current, sequences);
107 return active_sequences;
112 * Starts the given application by passing it through a shell. We use double fork
113 * to avoid zombie processes. As the started application’s parent exits (immediately),
114 * the application is reparented to init (process-id 1), which correctly handles
115 * childs, so we don’t have to do it :-).
117 * The shell is determined by looking for the SHELL environment variable. If it
118 * does not exist, /bin/sh is used.
120 * The no_startup_id flag determines whether a startup notification context
121 * (and ID) should be created, which is the default and encouraged behavior.
124 void start_application(const char *command, bool no_startup_id) {
125 SnLauncherContext *context;
127 if (!no_startup_id) {
128 /* Create a startup notification context to monitor the progress of this
130 context = sn_launcher_context_new(sndisplay, conn_screen);
131 sn_launcher_context_set_name(context, "i3");
132 sn_launcher_context_set_description(context, "exec command in i3");
133 /* Chop off everything starting from the first space (if there are any
134 * spaces in the command), since we don’t want the parameters. */
135 char *first_word = sstrdup(command);
136 char *space = strchr(first_word, ' ');
139 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
142 /* Trigger a timeout after 60 seconds */
143 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer));
144 ev_timer_init(timeout, startup_timeout, 60.0, 0.);
145 timeout->data = context;
146 ev_timer_start(main_loop, timeout);
148 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
150 /* Save the ID and current workspace in our internal list of startup
152 Con *ws = con_get_workspace(focused);
153 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence));
154 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context));
155 sequence->workspace = sstrdup(ws->name);
156 sequence->context = context;
157 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences);
159 /* Increase the refcount once (it starts with 1, so it will be 2 now) for
160 * the timeout. Even if the sequence gets completed, the timeout still
161 * needs the context (but will unref it then) */
162 sn_launcher_context_ref(context);
165 LOG("executing: %s\n", command);
169 setrlimit(RLIMIT_CORE, &original_rlimit_core);
170 /* Close all socket activation file descriptors explicitly, we disabled
171 * FD_CLOEXEC to keep them open when restarting i3. */
172 for (int fd = SD_LISTEN_FDS_START;
173 fd < (SD_LISTEN_FDS_START + listen_fds);
177 unsetenv("LISTEN_PID");
178 unsetenv("LISTEN_FDS");
180 /* Setup the environment variable(s) */
182 sn_launcher_context_setup_child_process(context);
184 /* Stores the path of the shell */
185 static const char *shell = NULL;
188 if ((shell = getenv("SHELL")) == NULL)
191 /* This is the child */
192 execl(shell, shell, "-c", command, (void*)NULL);
199 if (!no_startup_id) {
200 /* Change the pointer of the root window to indicate progress */
201 if (xcursor_supported)
202 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH);
203 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH);
208 * Called by libstartup-notification when something happens
211 void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
212 SnStartupSequence *snsequence;
214 snsequence = sn_monitor_event_get_startup_sequence(event);
216 /* Get the corresponding internal startup sequence */
217 const char *id = sn_startup_sequence_get_id(snsequence);
218 struct Startup_Sequence *current, *sequence = NULL;
219 TAILQ_FOREACH(current, &startup_sequences, sequences) {
220 if (strcmp(current->id, id) != 0)
228 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id);
232 switch (sn_monitor_event_get_type(event)) {
233 case SN_MONITOR_EVENT_COMPLETED:
234 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence));
236 if (_delete_startup_sequence(sequence) == 0) {
237 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n");
238 /* Change the pointer of the root window to indicate progress */
239 if (xcursor_supported)
240 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
241 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
251 * Checks if the given window belongs to a startup notification by checking if
252 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s
255 * If so, returns the workspace on which the startup was initiated.
256 * Returns NULL otherwise.
259 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) {
260 /* The _NET_STARTUP_ID is only needed during this function, so we get it
261 * here and don’t save it in the 'cwindow'. */
262 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
263 FREE(startup_id_reply);
264 DLOG("No _NET_STARTUP_ID set on this window\n");
265 if (cwindow->leader == XCB_NONE)
268 xcb_get_property_cookie_t cookie;
269 cookie = xcb_get_property(conn, false, cwindow->leader, A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
270 DLOG("Checking leader window 0x%08x\n", cwindow->leader);
271 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
273 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
274 DLOG("No _NET_STARTUP_ID set on the leader either\n");
275 FREE(startup_id_reply);
281 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply),
282 (char*)xcb_get_property_value(startup_id_reply)) == -1) {
283 perror("asprintf()");
284 DLOG("Could not get _NET_STARTUP_ID\n");
285 free(startup_id_reply);
289 struct Startup_Sequence *current, *sequence = NULL;
290 TAILQ_FOREACH(current, &startup_sequences, sequences) {
291 if (strcmp(current->id, startup_id) != 0)
299 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id);
301 free(startup_id_reply);
306 free(startup_id_reply);
307 return sequence->workspace;