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 * Starts the given application by passing it through a shell. We use double fork
62 * to avoid zombie processes. As the started application’s parent exits (immediately),
63 * the application is reparented to init (process-id 1), which correctly handles
64 * childs, so we don’t have to do it :-).
66 * The shell is determined by looking for the SHELL environment variable. If it
67 * does not exist, /bin/sh is used.
69 * The no_startup_id flag determines whether a startup notification context
70 * (and ID) should be created, which is the default and encouraged behavior.
73 void start_application(const char *command, bool no_startup_id) {
74 SnLauncherContext *context;
77 /* Create a startup notification context to monitor the progress of this
79 context = sn_launcher_context_new(sndisplay, conn_screen);
80 sn_launcher_context_set_name(context, "i3");
81 sn_launcher_context_set_description(context, "exec command in i3");
82 /* Chop off everything starting from the first space (if there are any
83 * spaces in the command), since we don’t want the parameters. */
84 char *first_word = sstrdup(command);
85 char *space = strchr(first_word, ' ');
88 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp);
91 /* Trigger a timeout after 60 seconds */
92 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer));
93 ev_timer_init(timeout, startup_timeout, 60.0, 0.);
94 timeout->data = context;
95 ev_timer_start(main_loop, timeout);
97 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context));
99 /* Save the ID and current workspace in our internal list of startup
101 Con *ws = con_get_workspace(focused);
102 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence));
103 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context));
104 sequence->workspace = sstrdup(ws->name);
105 sequence->context = context;
106 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences);
108 /* Increase the refcount once (it starts with 1, so it will be 2 now) for
109 * the timeout. Even if the sequence gets completed, the timeout still
110 * needs the context (but will unref it then) */
111 sn_launcher_context_ref(context);
114 LOG("executing: %s\n", command);
118 setrlimit(RLIMIT_CORE, &original_rlimit_core);
119 /* Close all socket activation file descriptors explicitly, we disabled
120 * FD_CLOEXEC to keep them open when restarting i3. */
121 for (int fd = SD_LISTEN_FDS_START;
122 fd < (SD_LISTEN_FDS_START + listen_fds);
126 unsetenv("LISTEN_PID");
127 unsetenv("LISTEN_FDS");
129 /* Setup the environment variable(s) */
131 sn_launcher_context_setup_child_process(context);
133 /* Stores the path of the shell */
134 static const char *shell = NULL;
137 if ((shell = getenv("SHELL")) == NULL)
140 /* This is the child */
141 execl(shell, shell, "-c", command, (void*)NULL);
148 if (!no_startup_id) {
149 /* Change the pointer of the root window to indicate progress */
150 if (xcursor_supported)
151 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH);
152 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH);
157 * Called by libstartup-notification when something happens
160 void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
161 SnStartupSequence *snsequence;
163 snsequence = sn_monitor_event_get_startup_sequence(event);
165 /* Get the corresponding internal startup sequence */
166 const char *id = sn_startup_sequence_get_id(snsequence);
167 struct Startup_Sequence *current, *sequence = NULL;
168 TAILQ_FOREACH(current, &startup_sequences, sequences) {
169 if (strcmp(current->id, id) != 0)
177 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id);
181 switch (sn_monitor_event_get_type(event)) {
182 case SN_MONITOR_EVENT_COMPLETED:
183 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence));
185 /* Unref the context, will be free()d */
186 sn_launcher_context_unref(sequence->context);
188 /* Delete our internal sequence */
189 TAILQ_REMOVE(&startup_sequences, sequence, sequences);
191 if (TAILQ_EMPTY(&startup_sequences)) {
192 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n");
193 /* Change the pointer of the root window to indicate progress */
194 if (xcursor_supported)
195 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER);
196 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER);
206 * Checks if the given window belongs to a startup notification by checking if
207 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s
210 * If so, returns the workspace on which the startup was initiated.
211 * Returns NULL otherwise.
214 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) {
215 /* The _NET_STARTUP_ID is only needed during this function, so we get it
216 * here and don’t save it in the 'cwindow'. */
217 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
218 FREE(startup_id_reply);
219 DLOG("No _NET_STARTUP_ID set on this window\n");
220 if (cwindow->leader == XCB_NONE)
223 xcb_get_property_cookie_t cookie;
224 cookie = xcb_get_property(conn, false, cwindow->leader, A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
225 DLOG("Checking leader window 0x%08x\n", cwindow->leader);
226 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
228 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) {
229 DLOG("No _NET_STARTUP_ID set on the leader either\n");
230 FREE(startup_id_reply);
236 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply),
237 (char*)xcb_get_property_value(startup_id_reply)) == -1) {
238 perror("asprintf()");
239 DLOG("Could not get _NET_STARTUP_ID\n");
240 free(startup_id_reply);
244 struct Startup_Sequence *current, *sequence = NULL;
245 TAILQ_FOREACH(current, &startup_sequences, sequences) {
246 if (strcmp(current->id, startup_id) != 0)
254 free(startup_id_reply);
257 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id);
261 return sequence->workspace;