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00013 #include <sys/types.h>
00014 #include <sys/socket.h>
00015 #include <sys/stat.h>
00016 #include <sys/un.h>
00017 #include <fcntl.h>
00018 #include <unistd.h>
00019 #include <string.h>
00020 #include <errno.h>
00021 #include <err.h>
00022 #include <stdlib.h>
00023 #include <stdint.h>
00024 #include <stdio.h>
00025 #include <libgen.h>
00026 #include <ev.h>
00027 #include <yajl/yajl_gen.h>
00028 #include <yajl/yajl_parse.h>
00029
00030 #include "queue.h"
00031 #include "ipc.h"
00032 #include "i3.h"
00033 #include "util.h"
00034 #include "commands.h"
00035 #include "log.h"
00036 #include "table.h"
00037 #include "randr.h"
00038 #include "config.h"
00039
00040
00041 #define y(x, ...) yajl_gen_ ## x (gen, ##__VA_ARGS__)
00042 #define ystr(str) yajl_gen_string(gen, (unsigned char*)str, strlen(str))
00043
00044 TAILQ_HEAD(ipc_client_head, ipc_client) all_clients = TAILQ_HEAD_INITIALIZER(all_clients);
00045
00046
00047
00048
00049
00050
00051
00052 static void set_nonblock(int sockfd) {
00053 int flags = fcntl(sockfd, F_GETFL, 0);
00054 flags |= O_NONBLOCK;
00055 if (fcntl(sockfd, F_SETFL, flags) < 0)
00056 err(-1, "Could not set O_NONBLOCK");
00057 }
00058
00059
00060
00061
00062
00063 static bool mkdirp(const char *path) {
00064 if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == 0)
00065 return true;
00066 if (errno != ENOENT) {
00067 ELOG("mkdir(%s) failed: %s\n", path, strerror(errno));
00068 return false;
00069 }
00070 char *copy = strdup(path);
00071
00072 while (copy[strlen(copy)-1] == '/')
00073 copy[strlen(copy)-1] = '\0';
00074
00075 char *sep = strrchr(copy, '/');
00076 if (sep == NULL)
00077 return false;
00078 *sep = '\0';
00079 bool result = false;
00080 if (mkdirp(copy))
00081 result = mkdirp(path);
00082 free(copy);
00083
00084 return result;
00085 }
00086
00087 static void ipc_send_message(int fd, const unsigned char *payload,
00088 int message_type, int message_size) {
00089 int buffer_size = strlen("i3-ipc") + sizeof(uint32_t) +
00090 sizeof(uint32_t) + message_size;
00091 char msg[buffer_size];
00092 char *walk = msg;
00093
00094 strcpy(walk, "i3-ipc");
00095 walk += strlen("i3-ipc");
00096 memcpy(walk, &message_size, sizeof(uint32_t));
00097 walk += sizeof(uint32_t);
00098 memcpy(walk, &message_type, sizeof(uint32_t));
00099 walk += sizeof(uint32_t);
00100 memcpy(walk, payload, message_size);
00101
00102 int sent_bytes = 0;
00103 int bytes_to_go = buffer_size;
00104 while (sent_bytes < bytes_to_go) {
00105 int n = write(fd, msg + sent_bytes, bytes_to_go);
00106 if (n == -1) {
00107 DLOG("write() failed: %s\n", strerror(errno));
00108 return;
00109 }
00110
00111 sent_bytes += n;
00112 bytes_to_go -= n;
00113 }
00114 }
00115
00116
00117
00118
00119
00120
00121 void ipc_send_event(const char *event, uint32_t message_type, const char *payload) {
00122 ipc_client *current;
00123 TAILQ_FOREACH(current, &all_clients, clients) {
00124
00125 bool interested = false;
00126 for (int i = 0; i < current->num_events; i++) {
00127 if (strcasecmp(current->events[i], event) != 0)
00128 continue;
00129 interested = true;
00130 break;
00131 }
00132 if (!interested)
00133 continue;
00134
00135 ipc_send_message(current->fd, (const unsigned char*)payload,
00136 message_type, strlen(payload));
00137 }
00138 }
00139
00140
00141
00142
00143
00144
00145 void ipc_shutdown() {
00146 ipc_client *current;
00147 TAILQ_FOREACH(current, &all_clients, clients) {
00148 shutdown(current->fd, SHUT_RDWR);
00149 close(current->fd);
00150 }
00151 }
00152
00153
00154
00155
00156
00157
00158 IPC_HANDLER(command) {
00159
00160
00161 char *command = scalloc(message_size);
00162 strncpy(command, (const char*)message, message_size);
00163 parse_command(global_conn, (const char*)command);
00164 free(command);
00165
00166
00167
00168 const char *reply = "{\"success\":true}";
00169 ipc_send_message(fd, (const unsigned char*)reply,
00170 I3_IPC_REPLY_TYPE_COMMAND, strlen(reply));
00171 }
00172
00173
00174
00175
00176
00177
00178 IPC_HANDLER(get_workspaces) {
00179 Workspace *ws;
00180
00181 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
00182 if (last_focused == SLIST_END(&(c_ws->focus_stack)))
00183 last_focused = NULL;
00184
00185 yajl_gen gen = yajl_gen_alloc(NULL, NULL);
00186 y(array_open);
00187
00188 TAILQ_FOREACH(ws, workspaces, workspaces) {
00189 if (ws->output == NULL)
00190 continue;
00191
00192 y(map_open);
00193 ystr("num");
00194 y(integer, ws->num + 1);
00195
00196 ystr("name");
00197 ystr(ws->utf8_name);
00198
00199 ystr("visible");
00200 y(bool, ws->output->current_workspace == ws);
00201
00202 ystr("focused");
00203 y(bool, c_ws == ws);
00204
00205 ystr("rect");
00206 y(map_open);
00207 ystr("x");
00208 y(integer, ws->rect.x);
00209 ystr("y");
00210 y(integer, ws->rect.y);
00211 ystr("width");
00212 y(integer, ws->rect.width);
00213 ystr("height");
00214 y(integer, ws->rect.height);
00215 y(map_close);
00216
00217 ystr("output");
00218 ystr(ws->output->name);
00219
00220 ystr("urgent");
00221 y(bool, ws->urgent);
00222
00223 y(map_close);
00224 }
00225
00226 y(array_close);
00227
00228 const unsigned char *payload;
00229 unsigned int length;
00230 y(get_buf, &payload, &length);
00231
00232 ipc_send_message(fd, payload, I3_IPC_REPLY_TYPE_WORKSPACES, length);
00233 y(free);
00234 }
00235
00236
00237
00238
00239
00240
00241 IPC_HANDLER(get_outputs) {
00242 Output *output;
00243
00244 yajl_gen gen = yajl_gen_alloc(NULL, NULL);
00245 y(array_open);
00246
00247 TAILQ_FOREACH(output, &outputs, outputs) {
00248 y(map_open);
00249
00250 ystr("name");
00251 ystr(output->name);
00252
00253 ystr("active");
00254 y(bool, output->active);
00255
00256 ystr("rect");
00257 y(map_open);
00258 ystr("x");
00259 y(integer, output->rect.x);
00260 ystr("y");
00261 y(integer, output->rect.y);
00262 ystr("width");
00263 y(integer, output->rect.width);
00264 ystr("height");
00265 y(integer, output->rect.height);
00266 y(map_close);
00267
00268 ystr("current_workspace");
00269 if (output->current_workspace == NULL)
00270 y(null);
00271 else y(integer, output->current_workspace->num + 1);
00272
00273 y(map_close);
00274 }
00275
00276 y(array_close);
00277
00278 const unsigned char *payload;
00279 unsigned int length;
00280 y(get_buf, &payload, &length);
00281
00282 ipc_send_message(fd, payload, I3_IPC_REPLY_TYPE_OUTPUTS, length);
00283 y(free);
00284 }
00285
00286
00287
00288
00289
00290 static int add_subscription(void *extra, const unsigned char *s,
00291 unsigned int len) {
00292 ipc_client *client = extra;
00293
00294 DLOG("should add subscription to extra %p, sub %.*s\n", client, len, s);
00295 int event = client->num_events;
00296
00297 client->num_events++;
00298 client->events = realloc(client->events, client->num_events * sizeof(char*));
00299
00300
00301 client->events[event] = scalloc(len+1);
00302 memcpy(client->events[event], s, len);
00303
00304 DLOG("client is now subscribed to:\n");
00305 for (int i = 0; i < client->num_events; i++)
00306 DLOG("event %s\n", client->events[i]);
00307 DLOG("(done)\n");
00308
00309 return 1;
00310 }
00311
00312
00313
00314
00315
00316
00317 IPC_HANDLER(subscribe) {
00318 yajl_handle p;
00319 yajl_callbacks callbacks;
00320 yajl_status stat;
00321 ipc_client *current, *client = NULL;
00322
00323
00324 TAILQ_FOREACH(current, &all_clients, clients) {
00325 if (current->fd != fd)
00326 continue;
00327
00328 client = current;
00329 break;
00330 }
00331
00332 if (client == NULL) {
00333 ELOG("Could not find ipc_client data structure for fd %d\n", fd);
00334 return;
00335 }
00336
00337
00338 memset(&callbacks, 0, sizeof(yajl_callbacks));
00339 callbacks.yajl_string = add_subscription;
00340
00341 p = yajl_alloc(&callbacks, NULL, NULL, (void*)client);
00342 stat = yajl_parse(p, (const unsigned char*)message, message_size);
00343 if (stat != yajl_status_ok) {
00344 unsigned char *err;
00345 err = yajl_get_error(p, true, (const unsigned char*)message,
00346 message_size);
00347 ELOG("YAJL parse error: %s\n", err);
00348 yajl_free_error(p, err);
00349
00350 const char *reply = "{\"success\":false}";
00351 ipc_send_message(fd, (const unsigned char*)reply,
00352 I3_IPC_REPLY_TYPE_SUBSCRIBE, strlen(reply));
00353 yajl_free(p);
00354 return;
00355 }
00356 yajl_free(p);
00357 const char *reply = "{\"success\":true}";
00358 ipc_send_message(fd, (const unsigned char*)reply,
00359 I3_IPC_REPLY_TYPE_SUBSCRIBE, strlen(reply));
00360 }
00361
00362
00363
00364 handler_t handlers[4] = {
00365 handle_command,
00366 handle_get_workspaces,
00367 handle_subscribe,
00368 handle_get_outputs
00369 };
00370
00371
00372
00373
00374
00375
00376
00377
00378
00379
00380
00381 static void ipc_receive_message(EV_P_ struct ev_io *w, int revents) {
00382 char buf[2048];
00383 int n = read(w->fd, buf, sizeof(buf));
00384
00385
00386 if (n <= 0) {
00387 #if 0
00388
00389
00390
00391 if (errno == EAGAIN || errno == EWOULDBLOCK)
00392 return;
00393 #endif
00394
00395
00396
00397 close(w->fd);
00398
00399
00400 ipc_client *current;
00401 TAILQ_FOREACH(current, &all_clients, clients) {
00402 if (current->fd != w->fd)
00403 continue;
00404
00405 for (int i = 0; i < current->num_events; i++)
00406 free(current->events[i]);
00407
00408
00409 TAILQ_REMOVE(&all_clients, current, clients);
00410 break;
00411 }
00412
00413 ev_io_stop(EV_A_ w);
00414
00415 DLOG("IPC: client disconnected\n");
00416 return;
00417 }
00418
00419
00420 buf[n] = '\0';
00421
00422
00423 if (n < strlen(I3_IPC_MAGIC)) {
00424 DLOG("IPC: message too short, ignoring\n");
00425 return;
00426 }
00427
00428 if (strncmp(buf, I3_IPC_MAGIC, strlen(I3_IPC_MAGIC)) != 0) {
00429 DLOG("IPC: message does not start with the IPC magic\n");
00430 return;
00431 }
00432
00433 uint8_t *message = (uint8_t*)buf;
00434 while (n > 0) {
00435 DLOG("IPC: n = %d\n", n);
00436 message += strlen(I3_IPC_MAGIC);
00437 n -= strlen(I3_IPC_MAGIC);
00438
00439
00440 uint32_t message_size = *((uint32_t*)message);
00441 message += sizeof(uint32_t);
00442 n -= sizeof(uint32_t);
00443
00444 if (message_size > n) {
00445 DLOG("IPC: Either the message size was wrong or the message was not read completely, dropping\n");
00446 return;
00447 }
00448
00449
00450 uint32_t message_type = *((uint32_t*)message);
00451 message += sizeof(uint32_t);
00452 n -= sizeof(uint32_t);
00453
00454 if (message_type >= (sizeof(handlers) / sizeof(handler_t)))
00455 DLOG("Unhandled message type: %d\n", message_type);
00456 else {
00457 handler_t h = handlers[message_type];
00458 h(w->fd, message, n, message_size, message_type);
00459 }
00460 n -= message_size;
00461 message += message_size;
00462 }
00463 }
00464
00465
00466
00467
00468
00469
00470
00471
00472 void ipc_new_client(EV_P_ struct ev_io *w, int revents) {
00473 struct sockaddr_un peer;
00474 socklen_t len = sizeof(struct sockaddr_un);
00475 int client;
00476 if ((client = accept(w->fd, (struct sockaddr*)&peer, &len)) < 0) {
00477 if (errno == EINTR)
00478 return;
00479 else perror("accept()");
00480 return;
00481 }
00482
00483 set_nonblock(client);
00484
00485 struct ev_io *package = scalloc(sizeof(struct ev_io));
00486 ev_io_init(package, ipc_receive_message, client, EV_READ);
00487 ev_io_start(EV_A_ package);
00488
00489 DLOG("IPC: new client connected\n");
00490
00491 ipc_client *new = scalloc(sizeof(ipc_client));
00492 new->fd = client;
00493
00494 TAILQ_INSERT_TAIL(&all_clients, new, clients);
00495 }
00496
00497
00498
00499
00500
00501
00502 int ipc_create_socket(const char *filename) {
00503 int sockfd;
00504
00505 char *globbed = glob_path(filename);
00506 DLOG("Creating IPC-socket at %s\n", globbed);
00507 char *copy = sstrdup(globbed);
00508 const char *dir = dirname(copy);
00509 if (!path_exists(dir))
00510 mkdirp(dir);
00511 free(copy);
00512
00513
00514 unlink(globbed);
00515
00516 if ((sockfd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0) {
00517 perror("socket()");
00518 free(globbed);
00519 return -1;
00520 }
00521
00522 (void)fcntl(sockfd, F_SETFD, FD_CLOEXEC);
00523
00524 struct sockaddr_un addr;
00525 memset(&addr, 0, sizeof(struct sockaddr_un));
00526 addr.sun_family = AF_LOCAL;
00527 strcpy(addr.sun_path, globbed);
00528 if (bind(sockfd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0) {
00529 perror("bind()");
00530 free(globbed);
00531 return -1;
00532 }
00533
00534 free(globbed);
00535 set_nonblock(sockfd);
00536
00537 if (listen(sockfd, 5) < 0) {
00538 perror("listen()");
00539 return -1;
00540 }
00541
00542 return sockfd;
00543 }