3 * vim:ts=4:sw=4:expandtab
5 * i3 - an improved dynamic tiling window manager
6 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
8 * startup.c: Startup notification code. Ensures a startup notification context
9 * is setup when launching applications. We store the current
10 * workspace to open windows in that startup notification context on
11 * the appropriate workspace.
15 #include "sd-daemon.h"
17 #include <sys/types.h>
20 #define SN_API_NOT_YET_FROZEN 1
21 #include <libsn/sn-launcher.h>
23 static TAILQ_HEAD(startup_sequence_head, Startup_Sequence) startup_sequences =
24 TAILQ_HEAD_INITIALIZER(startup_sequences);
27 * After 60 seconds, a timeout will be triggered for each startup sequence.
29 * The timeout will just trigger completion of the sequence, so the normal
30 * completion process takes place (startup_monitor_event will free it).
33 static void startup_timeout(EV_P_ ev_timer *w, int revents) {
34 const char *id = sn_launcher_context_get_startup_id(w->data);
35 DLOG("Timeout for startup sequence %s\n", id);
37 struct Startup_Sequence *current, *sequence = NULL;
38 TAILQ_FOREACH(current, &startup_sequences, sequences) {
39 if (strcmp(current->id, id) != 0)
46 /* Unref the context (for the timeout itself, see start_application) */
47 sn_launcher_context_unref(w->data);
50 DLOG("Sequence already deleted, nevermind.\n");
54 /* Complete the startup sequence, will trigger its deletion. */
55 sn_launcher_context_complete(w->data);
60 * Starts the given application by passing it through a shell. We use double fork
61 * to avoid zombie processes. As the started application’s parent exits (immediately),
62 * the application is reparented to init (process-id 1), which correctly handles
63 * childs, so we don’t have to do it :-).
65 * The shell is determined by looking for the SHELL environment variable. If it
66 * does not exist, /bin/sh is used.
68 * The no_startup_id flag determines whether a startup notification context
69 * (and ID) should be created, which is the default and encouraged behavior.
72 void start_application(const char *command, bool no_startup_id) {
73 SnLauncherContext *context;
76 /* Create a startup notification context to monitor the progress of this
78 context = sn_launcher_context_new(sndisplay, conn_screen);
79 sn_launcher_context_set_name(context, "i3");
80 sn_launcher_context_set_description(context, "exec command in i3");
81 /* Chop off everything starting from the first space (if there are any
82 * spaces in the command), since we don’t want the parameters. */
83 char *first_word = sstrdup(command);
84 char *space = strchr(first_word, ' ');
87 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
90 /* Trigger a timeout after 60 seconds */
91 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer));
92 ev_timer_init(timeout, startup_timeout, 60.0, 0.);
93 timeout->data = context;
94 ev_timer_start(main_loop, timeout);
96 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
98 /* Save the ID and current workspace in our internal list of startup
100 Con *ws = con_get_workspace(focused);
101 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence));
102 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context));
103 sequence->workspace = sstrdup(ws->name);
104 sequence->context = context;
105 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences);
107 /* Increase the refcount once (it starts with 1, so it will be 2 now) for
108 * the timeout. Even if the sequence gets completed, the timeout still
109 * needs the context (but will unref it then) */
110 sn_launcher_context_ref(context);
113 LOG("executing: %s\n", command);
117 setrlimit(RLIMIT_CORE, &original_rlimit_core);
118 /* Close all socket activation file descriptors explicitly, we disabled
119 * FD_CLOEXEC to keep them open when restarting i3. */
120 for (int fd = SD_LISTEN_FDS_START;
121 fd < (SD_LISTEN_FDS_START + listen_fds);
125 unsetenv("LISTEN_PID");
126 unsetenv("LISTEN_FDS");
128 /* Setup the environment variable(s) */
130 sn_launcher_context_setup_child_process(context);
132 /* Stores the path of the shell */
133 static const char *shell = NULL;
136 if ((shell = getenv("SHELL")) == NULL)
139 /* This is the child */
140 execl(shell, shell, "-c", command, (void*)NULL);
147 if (!no_startup_id) {
148 /* Change the pointer of the root window to indicate progress */
149 if (xcursor_supported)
150 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH);
151 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH);
156 * Called by libstartup-notification when something happens
159 void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
160 SnStartupSequence *snsequence;
162 snsequence = sn_monitor_event_get_startup_sequence(event);
164 /* Get the corresponding internal startup sequence */
165 const char *id = sn_startup_sequence_get_id(snsequence);
166 struct Startup_Sequence *current, *sequence = NULL;
167 TAILQ_FOREACH(current, &startup_sequences, sequences) {
168 if (strcmp(current->id, id) != 0)
176 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id);
180 switch (sn_monitor_event_get_type(event)) {
181 case SN_MONITOR_EVENT_COMPLETED:
182 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence));
184 /* Unref the context, will be free()d */
185 sn_launcher_context_unref(sequence->context);
187 /* Delete our internal sequence */
188 TAILQ_REMOVE(&startup_sequences, sequence, sequences);
190 if (TAILQ_EMPTY(&startup_sequences)) {
191 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n");
192 /* Change the pointer of the root window to indicate progress */
193 if (xcursor_supported)
194 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
195 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
205 * Checks if the given window belongs to a startup notification by checking if
206 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s
209 * If so, returns the workspace on which the startup was initiated.
210 * Returns NULL otherwise.
213 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) {
214 /* The _NET_STARTUP_ID is only needed during this function, so we get it
215 * here and don’t save it in the 'cwindow'. */
216 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
217 FREE(startup_id_reply);
218 DLOG("No _NET_STARTUP_ID set on this window\n");
219 if (cwindow->leader == XCB_NONE)
222 xcb_get_property_cookie_t cookie;
223 cookie = xcb_get_property(conn, false, cwindow->leader, A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
224 DLOG("Checking leader window 0x%08x\n", cwindow->leader);
225 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
227 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
228 DLOG("No _NET_STARTUP_ID set on the leader either\n");
229 FREE(startup_id_reply);
235 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply),
236 (char*)xcb_get_property_value(startup_id_reply)) == -1) {
237 perror("asprintf()");
238 DLOG("Could not get _NET_STARTUP_ID\n");
239 free(startup_id_reply);
243 struct Startup_Sequence *current, *sequence = NULL;
244 TAILQ_FOREACH(current, &startup_sequences, sequences) {
245 if (strcmp(current->id, startup_id) != 0)
253 free(startup_id_reply);
256 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id);
260 return sequence->workspace;