#undef I3__FILE__ #define I3__FILE__ "startup.c" /* * vim:ts=4:sw=4:expandtab * * i3 - an improved dynamic tiling window manager * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE) * * startup.c: Startup notification code. Ensures a startup notification context * is setup when launching applications. We store the current * workspace to open windows in that startup notification context on * the appropriate workspace. * */ #include "all.h" #include "sd-daemon.h" #include #include #define SN_API_NOT_YET_FROZEN 1 #include static TAILQ_HEAD(startup_sequence_head, Startup_Sequence) startup_sequences = TAILQ_HEAD_INITIALIZER(startup_sequences); /* * After 60 seconds, a timeout will be triggered for each startup sequence. * * The timeout will just trigger completion of the sequence, so the normal * completion process takes place (startup_monitor_event will free it). * */ static void startup_timeout(EV_P_ ev_timer *w, int revents) { const char *id = sn_launcher_context_get_startup_id(w->data); DLOG("Timeout for startup sequence %s\n", id); struct Startup_Sequence *current, *sequence = NULL; TAILQ_FOREACH(current, &startup_sequences, sequences) { if (strcmp(current->id, id) != 0) continue; sequence = current; break; } /* Unref the context (for the timeout itself, see start_application) */ sn_launcher_context_unref(w->data); if (!sequence) { DLOG("Sequence already deleted, nevermind.\n"); return; } /* Complete the startup sequence, will trigger its deletion. */ sn_launcher_context_complete(w->data); free(w); } /* * Starts the given application by passing it through a shell. We use double fork * to avoid zombie processes. As the started application’s parent exits (immediately), * the application is reparented to init (process-id 1), which correctly handles * childs, so we don’t have to do it :-). * * The shell is determined by looking for the SHELL environment variable. If it * does not exist, /bin/sh is used. * * The no_startup_id flag determines whether a startup notification context * (and ID) should be created, which is the default and encouraged behavior. * */ void start_application(const char *command, bool no_startup_id) { SnLauncherContext *context; if (!no_startup_id) { /* Create a startup notification context to monitor the progress of this * startup. */ context = sn_launcher_context_new(sndisplay, conn_screen); sn_launcher_context_set_name(context, "i3"); sn_launcher_context_set_description(context, "exec command in i3"); /* Chop off everything starting from the first space (if there are any * spaces in the command), since we don’t want the parameters. */ char *first_word = sstrdup(command); char *space = strchr(first_word, ' '); if (space) *space = '\0'; sn_launcher_context_initiate(context, "i3", first_word, last_timestamp); free(first_word); /* Trigger a timeout after 60 seconds */ struct ev_timer *timeout = scalloc(sizeof(struct ev_timer)); ev_timer_init(timeout, startup_timeout, 60.0, 0.); timeout->data = context; ev_timer_start(main_loop, timeout); LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context)); /* Save the ID and current workspace in our internal list of startup * sequences */ Con *ws = con_get_workspace(focused); struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence)); sequence->id = sstrdup(sn_launcher_context_get_startup_id(context)); sequence->workspace = sstrdup(ws->name); sequence->context = context; TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences); /* Increase the refcount once (it starts with 1, so it will be 2 now) for * the timeout. Even if the sequence gets completed, the timeout still * needs the context (but will unref it then) */ sn_launcher_context_ref(context); } LOG("executing: %s\n", command); if (fork() == 0) { /* Child process */ setsid(); setrlimit(RLIMIT_CORE, &original_rlimit_core); /* Close all socket activation file descriptors explicitly, we disabled * FD_CLOEXEC to keep them open when restarting i3. */ for (int fd = SD_LISTEN_FDS_START; fd < (SD_LISTEN_FDS_START + listen_fds); fd++) { close(fd); } unsetenv("LISTEN_PID"); unsetenv("LISTEN_FDS"); if (fork() == 0) { /* Setup the environment variable(s) */ if (!no_startup_id) sn_launcher_context_setup_child_process(context); /* Stores the path of the shell */ static const char *shell = NULL; if (shell == NULL) if ((shell = getenv("SHELL")) == NULL) shell = "/bin/sh"; /* This is the child */ execl(shell, shell, "-c", command, (void*)NULL); /* not reached */ } _exit(0); } wait(0); if (!no_startup_id) { /* Change the pointer of the root window to indicate progress */ if (xcursor_supported) xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH); else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH); } } /* * Called by libstartup-notification when something happens * */ void startup_monitor_event(SnMonitorEvent *event, void *userdata) { SnStartupSequence *snsequence; snsequence = sn_monitor_event_get_startup_sequence(event); /* Get the corresponding internal startup sequence */ const char *id = sn_startup_sequence_get_id(snsequence); struct Startup_Sequence *current, *sequence = NULL; TAILQ_FOREACH(current, &startup_sequences, sequences) { if (strcmp(current->id, id) != 0) continue; sequence = current; break; } if (!sequence) { DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id); return; } switch (sn_monitor_event_get_type(event)) { case SN_MONITOR_EVENT_COMPLETED: DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence)); /* Unref the context, will be free()d */ sn_launcher_context_unref(sequence->context); /* Delete our internal sequence */ TAILQ_REMOVE(&startup_sequences, sequence, sequences); if (TAILQ_EMPTY(&startup_sequences)) { DLOG("No more startup sequences running, changing root window cursor to default pointer.\n"); /* Change the pointer of the root window to indicate progress */ if (xcursor_supported) xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER); else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER); } break; default: /* ignore */ break; } } /* * Checks if the given window belongs to a startup notification by checking if * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s * unset). * * If so, returns the workspace on which the startup was initiated. * Returns NULL otherwise. * */ char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) { /* The _NET_STARTUP_ID is only needed during this function, so we get it * here and don’t save it in the 'cwindow'. */ if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) { FREE(startup_id_reply); DLOG("No _NET_STARTUP_ID set on this window\n"); if (cwindow->leader == XCB_NONE) return NULL; xcb_get_property_cookie_t cookie; cookie = xcb_get_property(conn, false, cwindow->leader, A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512); DLOG("Checking leader window 0x%08x\n", cwindow->leader); startup_id_reply = xcb_get_property_reply(conn, cookie, NULL); if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) { DLOG("No _NET_STARTUP_ID set on the leader either\n"); FREE(startup_id_reply); return NULL; } } char *startup_id; if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply), (char*)xcb_get_property_value(startup_id_reply)) == -1) { perror("asprintf()"); DLOG("Could not get _NET_STARTUP_ID\n"); free(startup_id_reply); return NULL; } struct Startup_Sequence *current, *sequence = NULL; TAILQ_FOREACH(current, &startup_sequences, sequences) { if (strcmp(current->id, startup_id) != 0) continue; sequence = current; break; } free(startup_id); free(startup_id_reply); if (!sequence) { DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id); return NULL; } return sequence->workspace; }