2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
7 * startup.c: Startup notification code. Ensures a startup notification context
8 * is setup when launching applications. We store the current
9 * workspace to open windows in that startup notification context on
10 * the appropriate workspace.
14 #include "sd-daemon.h"
16 #include <sys/types.h>
19 #define SN_API_NOT_YET_FROZEN 1
20 #include <libsn/sn-launcher.h>
22 static TAILQ_HEAD(startup_sequence_head, Startup_Sequence) startup_sequences =
23 TAILQ_HEAD_INITIALIZER(startup_sequences);
26 * After 60 seconds, a timeout will be triggered for each startup sequence.
28 * The timeout will just trigger completion of the sequence, so the normal
29 * completion process takes place (startup_monitor_event will free it).
32 static void startup_timeout(EV_P_ ev_timer *w, int revents) {
33 const char *id = sn_launcher_context_get_startup_id(w->data);
34 DLOG("Timeout for startup sequence %s\n", id);
36 struct Startup_Sequence *current, *sequence = NULL;
37 TAILQ_FOREACH(current, &startup_sequences, sequences) {
38 if (strcmp(current->id, id) != 0)
45 /* Unref the context (for the timeout itself, see start_application) */
46 sn_launcher_context_unref(w->data);
49 DLOG("Sequence already deleted, nevermind.\n");
53 /* Complete the startup sequence, will trigger its deletion. */
54 sn_launcher_context_complete(w->data);
59 * Starts the given application by passing it through a shell. We use double fork
60 * to avoid zombie processes. As the started application’s parent exits (immediately),
61 * the application is reparented to init (process-id 1), which correctly handles
62 * childs, so we don’t have to do it :-).
64 * The shell is determined by looking for the SHELL environment variable. If it
65 * does not exist, /bin/sh is used.
67 * The no_startup_id flag determines whether a startup notification context
68 * (and ID) should be created, which is the default and encouraged behavior.
71 void start_application(const char *command, bool no_startup_id) {
72 SnLauncherContext *context;
75 /* Create a startup notification context to monitor the progress of this
77 context = sn_launcher_context_new(sndisplay, conn_screen);
78 sn_launcher_context_set_name(context, "i3");
79 sn_launcher_context_set_description(context, "exec command in i3");
80 /* Chop off everything starting from the first space (if there are any
81 * spaces in the command), since we don’t want the parameters. */
82 char *first_word = sstrdup(command);
83 char *space = strchr(first_word, ' ');
86 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
89 /* Trigger a timeout after 60 seconds */
90 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer));
91 ev_timer_init(timeout, startup_timeout, 60.0, 0.);
92 timeout->data = context;
93 ev_timer_start(main_loop, timeout);
95 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
97 /* Save the ID and current workspace in our internal list of startup
99 Con *ws = con_get_workspace(focused);
100 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence));
101 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context));
102 sequence->workspace = sstrdup(ws->name);
103 sequence->context = context;
104 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences);
106 /* Increase the refcount once (it starts with 1, so it will be 2 now) for
107 * the timeout. Even if the sequence gets completed, the timeout still
108 * needs the context (but will unref it then) */
109 sn_launcher_context_ref(context);
112 LOG("executing: %s\n", command);
116 setrlimit(RLIMIT_CORE, &original_rlimit_core);
117 /* Close all socket activation file descriptors explicitly, we disabled
118 * FD_CLOEXEC to keep them open when restarting i3. */
119 for (int fd = SD_LISTEN_FDS_START;
120 fd < (SD_LISTEN_FDS_START + listen_fds);
124 unsetenv("LISTEN_PID");
125 unsetenv("LISTEN_FDS");
127 /* Setup the environment variable(s) */
129 sn_launcher_context_setup_child_process(context);
131 /* Stores the path of the shell */
132 static const char *shell = NULL;
135 if ((shell = getenv("SHELL")) == NULL)
138 /* This is the child */
139 execl(shell, shell, "-c", command, (void*)NULL);
146 if (!no_startup_id) {
147 /* Change the pointer of the root window to indicate progress */
148 if (xcursor_supported)
149 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH);
150 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH);
155 * Called by libstartup-notification when something happens
158 void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
159 SnStartupSequence *snsequence;
161 snsequence = sn_monitor_event_get_startup_sequence(event);
163 /* Get the corresponding internal startup sequence */
164 const char *id = sn_startup_sequence_get_id(snsequence);
165 struct Startup_Sequence *current, *sequence = NULL;
166 TAILQ_FOREACH(current, &startup_sequences, sequences) {
167 if (strcmp(current->id, id) != 0)
175 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id);
179 switch (sn_monitor_event_get_type(event)) {
180 case SN_MONITOR_EVENT_COMPLETED:
181 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence));
183 /* Unref the context, will be free()d */
184 sn_launcher_context_unref(sequence->context);
186 /* Delete our internal sequence */
187 TAILQ_REMOVE(&startup_sequences, sequence, sequences);
189 if (TAILQ_EMPTY(&startup_sequences)) {
190 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n");
191 /* Change the pointer of the root window to indicate progress */
192 if (xcursor_supported)
193 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
194 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
204 * Checks if the given window belongs to a startup notification by checking if
205 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s
208 * If so, returns the workspace on which the startup was initiated.
209 * Returns NULL otherwise.
212 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) {
213 /* The _NET_STARTUP_ID is only needed during this function, so we get it
214 * here and don’t save it in the 'cwindow'. */
215 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
216 FREE(startup_id_reply);
217 DLOG("No _NET_STARTUP_ID set on this window\n");
218 if (cwindow->leader == XCB_NONE)
221 xcb_get_property_cookie_t cookie;
222 cookie = xcb_get_property(conn, false, cwindow->leader, A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
223 DLOG("Checking leader window 0x%08x\n", cwindow->leader);
224 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
226 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
227 DLOG("No _NET_STARTUP_ID set on the leader either\n");
228 FREE(startup_id_reply);
234 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply),
235 (char*)xcb_get_property_value(startup_id_reply)) == -1) {
236 perror("asprintf()");
237 DLOG("Could not get _NET_STARTUP_ID\n");
238 free(startup_id_reply);
242 struct Startup_Sequence *current, *sequence = NULL;
243 TAILQ_FOREACH(current, &startup_sequences, sequences) {
244 if (strcmp(current->id, startup_id) != 0)
252 free(startup_id_reply);
255 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id);
259 return sequence->workspace;