i3
|
00001 /* 00002 * vim:ts=4:sw=4:expandtab 00003 * 00004 * i3 - an improved dynamic tiling window manager 00005 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE) 00006 * 00007 * startup.c: Startup notification code. Ensures a startup notification context 00008 * is setup when launching applications. We store the current 00009 * workspace to open windows in that startup notification context on 00010 * the appropriate workspace. 00011 * 00012 */ 00013 #include "all.h" 00014 00015 #include <sys/types.h> 00016 #include <sys/wait.h> 00017 00018 #define SN_API_NOT_YET_FROZEN 1 00019 #include <libsn/sn-launcher.h> 00020 00021 static TAILQ_HEAD(startup_sequence_head, Startup_Sequence) startup_sequences = 00022 TAILQ_HEAD_INITIALIZER(startup_sequences); 00023 00024 /* 00025 * After 60 seconds, a timeout will be triggered for each startup sequence. 00026 * 00027 * The timeout will just trigger completion of the sequence, so the normal 00028 * completion process takes place (startup_monitor_event will free it). 00029 * 00030 */ 00031 static void startup_timeout(EV_P_ ev_timer *w, int revents) { 00032 const char *id = sn_launcher_context_get_startup_id(w->data); 00033 DLOG("Timeout for startup sequence %s\n", id); 00034 00035 struct Startup_Sequence *current, *sequence = NULL; 00036 TAILQ_FOREACH(current, &startup_sequences, sequences) { 00037 if (strcmp(current->id, id) != 0) 00038 continue; 00039 00040 sequence = current; 00041 break; 00042 } 00043 00044 /* Unref the context (for the timeout itself, see start_application) */ 00045 sn_launcher_context_unref(w->data); 00046 00047 if (!sequence) { 00048 DLOG("Sequence already deleted, nevermind.\n"); 00049 return; 00050 } 00051 00052 /* Complete the startup sequence, will trigger its deletion. */ 00053 sn_launcher_context_complete(w->data); 00054 free(w); 00055 } 00056 00057 /* 00058 * Starts the given application by passing it through a shell. We use double fork 00059 * to avoid zombie processes. As the started application’s parent exits (immediately), 00060 * the application is reparented to init (process-id 1), which correctly handles 00061 * childs, so we don’t have to do it :-). 00062 * 00063 * The shell is determined by looking for the SHELL environment variable. If it 00064 * does not exist, /bin/sh is used. 00065 * 00066 * The no_startup_id flag determines whether a startup notification context 00067 * (and ID) should be created, which is the default and encouraged behavior. 00068 * 00069 */ 00070 void start_application(const char *command, bool no_startup_id) { 00071 SnLauncherContext *context; 00072 00073 if (!no_startup_id) { 00074 /* Create a startup notification context to monitor the progress of this 00075 * startup. */ 00076 context = sn_launcher_context_new(sndisplay, conn_screen); 00077 sn_launcher_context_set_name(context, "i3"); 00078 sn_launcher_context_set_description(context, "exec command in i3"); 00079 /* Chop off everything starting from the first space (if there are any 00080 * spaces in the command), since we don’t want the parameters. */ 00081 char *first_word = sstrdup(command); 00082 char *space = strchr(first_word, ' '); 00083 if (space) 00084 *space = '\0'; 00085 sn_launcher_context_initiate(context, "i3", first_word, last_timestamp); 00086 free(first_word); 00087 00088 /* Trigger a timeout after 60 seconds */ 00089 struct ev_timer *timeout = scalloc(sizeof(struct ev_timer)); 00090 ev_timer_init(timeout, startup_timeout, 60.0, 0.); 00091 timeout->data = context; 00092 ev_timer_start(main_loop, timeout); 00093 00094 LOG("startup id = %s\n", sn_launcher_context_get_startup_id(context)); 00095 00096 /* Save the ID and current workspace in our internal list of startup 00097 * sequences */ 00098 Con *ws = con_get_workspace(focused); 00099 struct Startup_Sequence *sequence = scalloc(sizeof(struct Startup_Sequence)); 00100 sequence->id = sstrdup(sn_launcher_context_get_startup_id(context)); 00101 sequence->workspace = sstrdup(ws->name); 00102 sequence->context = context; 00103 TAILQ_INSERT_TAIL(&startup_sequences, sequence, sequences); 00104 00105 /* Increase the refcount once (it starts with 1, so it will be 2 now) for 00106 * the timeout. Even if the sequence gets completed, the timeout still 00107 * needs the context (but will unref it then) */ 00108 sn_launcher_context_ref(context); 00109 } 00110 00111 LOG("executing: %s\n", command); 00112 if (fork() == 0) { 00113 /* Child process */ 00114 setsid(); 00115 setrlimit(RLIMIT_CORE, &original_rlimit_core); 00116 if (fork() == 0) { 00117 /* Setup the environment variable(s) */ 00118 if (!no_startup_id) 00119 sn_launcher_context_setup_child_process(context); 00120 00121 /* Stores the path of the shell */ 00122 static const char *shell = NULL; 00123 00124 if (shell == NULL) 00125 if ((shell = getenv("SHELL")) == NULL) 00126 shell = "/bin/sh"; 00127 00128 /* This is the child */ 00129 execl(shell, shell, "-c", command, (void*)NULL); 00130 /* not reached */ 00131 } 00132 _exit(0); 00133 } 00134 wait(0); 00135 00136 if (!no_startup_id) { 00137 /* Change the pointer of the root window to indicate progress */ 00138 if (xcursor_supported) 00139 xcursor_set_root_cursor(XCURSOR_CURSOR_WATCH); 00140 else xcb_set_root_cursor(XCURSOR_CURSOR_WATCH); 00141 } 00142 } 00143 00144 /* 00145 * Called by libstartup-notification when something happens 00146 * 00147 */ 00148 void startup_monitor_event(SnMonitorEvent *event, void *userdata) { 00149 SnStartupSequence *snsequence; 00150 00151 snsequence = sn_monitor_event_get_startup_sequence(event); 00152 00153 /* Get the corresponding internal startup sequence */ 00154 const char *id = sn_startup_sequence_get_id(snsequence); 00155 struct Startup_Sequence *current, *sequence = NULL; 00156 TAILQ_FOREACH(current, &startup_sequences, sequences) { 00157 if (strcmp(current->id, id) != 0) 00158 continue; 00159 00160 sequence = current; 00161 break; 00162 } 00163 00164 if (!sequence) { 00165 DLOG("Got event for startup sequence that we did not initiate (ID = %s). Ignoring.\n", id); 00166 return; 00167 } 00168 00169 switch (sn_monitor_event_get_type(event)) { 00170 case SN_MONITOR_EVENT_COMPLETED: 00171 DLOG("startup sequence %s completed\n", sn_startup_sequence_get_id(snsequence)); 00172 00173 /* Unref the context, will be free()d */ 00174 sn_launcher_context_unref(sequence->context); 00175 00176 /* Delete our internal sequence */ 00177 TAILQ_REMOVE(&startup_sequences, sequence, sequences); 00178 00179 if (TAILQ_EMPTY(&startup_sequences)) { 00180 DLOG("No more startup sequences running, changing root window cursor to default pointer.\n"); 00181 /* Change the pointer of the root window to indicate progress */ 00182 if (xcursor_supported) 00183 xcursor_set_root_cursor(XCURSOR_CURSOR_POINTER); 00184 else xcb_set_root_cursor(XCURSOR_CURSOR_POINTER); 00185 } 00186 break; 00187 default: 00188 /* ignore */ 00189 break; 00190 } 00191 } 00192 00193 /* 00194 * Checks if the given window belongs to a startup notification by checking if 00195 * the _NET_STARTUP_ID property is set on the window (or on its leader, if it’s 00196 * unset). 00197 * 00198 * If so, returns the workspace on which the startup was initiated. 00199 * Returns NULL otherwise. 00200 * 00201 */ 00202 char *startup_workspace_for_window(i3Window *cwindow, xcb_get_property_reply_t *startup_id_reply) { 00203 /* The _NET_STARTUP_ID is only needed during this function, so we get it 00204 * here and don’t save it in the 'cwindow'. */ 00205 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) { 00206 FREE(startup_id_reply); 00207 DLOG("No _NET_STARTUP_ID set on this window\n"); 00208 if (cwindow->leader == XCB_NONE) 00209 return NULL; 00210 00211 xcb_get_property_cookie_t cookie; 00212 cookie = xcb_get_property(conn, false, cwindow->leader, A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512); 00213 DLOG("Checking leader window 0x%08x\n", cwindow->leader); 00214 startup_id_reply = xcb_get_property_reply(conn, cookie, NULL); 00215 00216 if (startup_id_reply == NULL || xcb_get_property_value_length(startup_id_reply) == 0) { 00217 DLOG("No _NET_STARTUP_ID set on the leader either\n"); 00218 FREE(startup_id_reply); 00219 return NULL; 00220 } 00221 } 00222 00223 char *startup_id; 00224 if (asprintf(&startup_id, "%.*s", xcb_get_property_value_length(startup_id_reply), 00225 (char*)xcb_get_property_value(startup_id_reply)) == -1) { 00226 perror("asprintf()"); 00227 DLOG("Could not get _NET_STARTUP_ID\n"); 00228 free(startup_id_reply); 00229 return NULL; 00230 } 00231 00232 struct Startup_Sequence *current, *sequence = NULL; 00233 TAILQ_FOREACH(current, &startup_sequences, sequences) { 00234 if (strcmp(current->id, startup_id) != 0) 00235 continue; 00236 00237 sequence = current; 00238 break; 00239 } 00240 00241 free(startup_id); 00242 free(startup_id_reply); 00243 00244 if (!sequence) { 00245 DLOG("WARNING: This sequence (ID %s) was not found\n", startup_id); 00246 return NULL; 00247 } 00248 00249 return sequence->workspace; 00250 }