1059 lines
26 KiB
C
1059 lines
26 KiB
C
#undef I3__FILE__
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#define I3__FILE__ "ipc.c"
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/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* ipc.c: UNIX domain socket IPC (initialization, client handling, protocol).
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*
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*/
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#include "all.h"
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#include "yajl_utils.h"
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <ev.h>
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#include <yajl/yajl_gen.h>
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#include <yajl/yajl_parse.h>
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char *current_socketpath = NULL;
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TAILQ_HEAD(ipc_client_head, ipc_client) all_clients = TAILQ_HEAD_INITIALIZER(all_clients);
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/*
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* Puts the given socket file descriptor into non-blocking mode or dies if
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* setting O_NONBLOCK failed. Non-blocking sockets are a good idea for our
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* IPC model because we should by no means block the window manager.
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*
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*/
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static void set_nonblock(int sockfd) {
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int flags = fcntl(sockfd, F_GETFL, 0);
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flags |= O_NONBLOCK;
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if (fcntl(sockfd, F_SETFL, flags) < 0)
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err(-1, "Could not set O_NONBLOCK");
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}
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/*
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* Emulates mkdir -p (creates any missing folders)
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*
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*/
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static bool mkdirp(const char *path) {
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if (mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == 0)
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return true;
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if (errno != ENOENT) {
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ELOG("mkdir(%s) failed: %s\n", path, strerror(errno));
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return false;
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}
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char *copy = sstrdup(path);
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/* strip trailing slashes, if any */
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while (copy[strlen(copy)-1] == '/')
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copy[strlen(copy)-1] = '\0';
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char *sep = strrchr(copy, '/');
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if (sep == NULL) {
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FREE(copy);
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return false;
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}
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*sep = '\0';
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bool result = false;
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if (mkdirp(copy))
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result = mkdirp(path);
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free(copy);
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return result;
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}
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/*
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* Sends the specified event to all IPC clients which are currently connected
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* and subscribed to this kind of event.
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*
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*/
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void ipc_send_event(const char *event, uint32_t message_type, const char *payload) {
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ipc_client *current;
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TAILQ_FOREACH(current, &all_clients, clients) {
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/* see if this client is interested in this event */
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bool interested = false;
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for (int i = 0; i < current->num_events; i++) {
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if (strcasecmp(current->events[i], event) != 0)
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continue;
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interested = true;
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break;
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}
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if (!interested)
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continue;
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ipc_send_message(current->fd, strlen(payload), message_type, (const uint8_t*)payload);
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}
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}
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/*
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* Calls shutdown() on each socket and closes it. This function to be called
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* when exiting or restarting only!
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*
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*/
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void ipc_shutdown(void) {
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ipc_client *current;
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while (!TAILQ_EMPTY(&all_clients)) {
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current = TAILQ_FIRST(&all_clients);
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shutdown(current->fd, SHUT_RDWR);
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close(current->fd);
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TAILQ_REMOVE(&all_clients, current, clients);
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free(current);
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}
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}
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/*
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* Executes the command and returns whether it could be successfully parsed
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* or not (at the moment, always returns true).
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*
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*/
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IPC_HANDLER(command) {
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/* To get a properly terminated buffer, we copy
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* message_size bytes out of the buffer */
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char *command = scalloc(message_size + 1);
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strncpy(command, (const char*)message, message_size);
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LOG("IPC: received: *%s*\n", command);
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struct CommandResult *command_output = parse_command((const char*)command);
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free(command);
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if (command_output->needs_tree_render)
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tree_render();
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const unsigned char *reply;
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ylength length;
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yajl_gen_get_buf(command_output->json_gen, &reply, &length);
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ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_COMMAND,
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(const uint8_t*)reply);
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yajl_gen_free(command_output->json_gen);
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}
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static void dump_rect(yajl_gen gen, const char *name, Rect r) {
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ystr(name);
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y(map_open);
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ystr("x");
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y(integer, r.x);
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ystr("y");
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y(integer, r.y);
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ystr("width");
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y(integer, r.width);
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ystr("height");
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y(integer, r.height);
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y(map_close);
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}
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void dump_node(yajl_gen gen, struct Con *con, bool inplace_restart) {
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y(map_open);
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ystr("id");
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y(integer, (long int)con);
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ystr("type");
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switch (con->type) {
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case CT_ROOT:
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ystr("root");
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break;
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case CT_OUTPUT:
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ystr("output");
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break;
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case CT_CON:
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ystr("con");
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break;
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case CT_FLOATING_CON:
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ystr("floating_con");
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break;
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case CT_WORKSPACE:
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ystr("workspace");
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break;
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case CT_DOCKAREA:
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ystr("dockarea");
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break;
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default:
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DLOG("About to dump unknown container type=%d. This is a bug.\n", con->type);
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assert(false);
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break;
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}
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||
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/* provided for backwards compatibility only. */
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ystr("orientation");
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if (!con_is_split(con))
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ystr("none");
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else {
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if (con_orientation(con) == HORIZ)
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ystr("horizontal");
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else ystr("vertical");
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}
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ystr("scratchpad_state");
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switch (con->scratchpad_state) {
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case SCRATCHPAD_NONE:
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ystr("none");
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break;
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case SCRATCHPAD_FRESH:
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ystr("fresh");
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break;
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case SCRATCHPAD_CHANGED:
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ystr("changed");
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break;
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}
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ystr("percent");
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if (con->percent == 0.0)
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y(null);
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else y(double, con->percent);
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ystr("urgent");
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y(bool, con->urgent);
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if (con->mark != NULL) {
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ystr("mark");
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ystr(con->mark);
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}
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ystr("focused");
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y(bool, (con == focused));
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||
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ystr("layout");
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||
switch (con->layout) {
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||
case L_DEFAULT:
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DLOG("About to dump layout=default, this is a bug in the code.\n");
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assert(false);
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break;
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case L_SPLITV:
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ystr("splitv");
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break;
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case L_SPLITH:
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ystr("splith");
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break;
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case L_STACKED:
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ystr("stacked");
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break;
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case L_TABBED:
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ystr("tabbed");
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break;
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||
case L_DOCKAREA:
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ystr("dockarea");
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break;
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case L_OUTPUT:
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ystr("output");
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break;
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}
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ystr("workspace_layout");
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switch (con->workspace_layout) {
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case L_DEFAULT:
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ystr("default");
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break;
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case L_STACKED:
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ystr("stacked");
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break;
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case L_TABBED:
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ystr("tabbed");
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break;
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default:
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DLOG("About to dump workspace_layout=%d (none of default/stacked/tabbed), this is a bug.\n", con->workspace_layout);
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assert(false);
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break;
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}
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ystr("last_split_layout");
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switch (con->layout) {
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case L_SPLITV:
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ystr("splitv");
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break;
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default:
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ystr("splith");
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break;
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}
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ystr("border");
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switch (con->border_style) {
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case BS_NORMAL:
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ystr("normal");
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break;
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case BS_NONE:
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ystr("none");
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break;
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case BS_PIXEL:
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ystr("pixel");
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break;
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}
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ystr("current_border_width");
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y(integer, con->current_border_width);
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dump_rect(gen, "rect", con->rect);
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dump_rect(gen, "window_rect", con->window_rect);
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dump_rect(gen, "geometry", con->geometry);
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ystr("name");
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if (con->window && con->window->name)
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ystr(i3string_as_utf8(con->window->name));
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else
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ystr(con->name);
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if (con->type == CT_WORKSPACE) {
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ystr("num");
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y(integer, con->num);
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}
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ystr("window");
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if (con->window)
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y(integer, con->window->id);
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else y(null);
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if (con->window && !inplace_restart) {
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||
/* Window properties are useless to preserve when restarting because
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* they will be queried again anyway. However, for i3-save-tree(1),
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* they are very useful and save i3-save-tree dealing with X11. */
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ystr("window_properties");
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y(map_open);
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#define DUMP_PROPERTY(key, prop_name) do { \
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if (con->window->prop_name != NULL) { \
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ystr(key); \
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ystr(con->window->prop_name); \
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} \
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} while (0)
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DUMP_PROPERTY("class", class_class);
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DUMP_PROPERTY("instance", class_instance);
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DUMP_PROPERTY("window_role", role);
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|
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if (con->window->name != NULL) {
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ystr("title");
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ystr(i3string_as_utf8(con->window->name));
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}
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|
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y(map_close);
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}
|
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|
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ystr("nodes");
|
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y(array_open);
|
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Con *node;
|
||
if (con->type != CT_DOCKAREA || !inplace_restart) {
|
||
TAILQ_FOREACH(node, &(con->nodes_head), nodes) {
|
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dump_node(gen, node, inplace_restart);
|
||
}
|
||
}
|
||
y(array_close);
|
||
|
||
ystr("floating_nodes");
|
||
y(array_open);
|
||
TAILQ_FOREACH(node, &(con->floating_head), floating_windows) {
|
||
dump_node(gen, node, inplace_restart);
|
||
}
|
||
y(array_close);
|
||
|
||
ystr("focus");
|
||
y(array_open);
|
||
TAILQ_FOREACH(node, &(con->focus_head), focused) {
|
||
y(integer, (long int)node);
|
||
}
|
||
y(array_close);
|
||
|
||
ystr("fullscreen_mode");
|
||
y(integer, con->fullscreen_mode);
|
||
|
||
ystr("floating");
|
||
switch (con->floating) {
|
||
case FLOATING_AUTO_OFF:
|
||
ystr("auto_off");
|
||
break;
|
||
case FLOATING_AUTO_ON:
|
||
ystr("auto_on");
|
||
break;
|
||
case FLOATING_USER_OFF:
|
||
ystr("user_off");
|
||
break;
|
||
case FLOATING_USER_ON:
|
||
ystr("user_on");
|
||
break;
|
||
}
|
||
|
||
ystr("swallows");
|
||
y(array_open);
|
||
Match *match;
|
||
TAILQ_FOREACH(match, &(con->swallow_head), matches) {
|
||
y(map_open);
|
||
if (match->dock != -1) {
|
||
ystr("dock");
|
||
y(integer, match->dock);
|
||
ystr("insert_where");
|
||
y(integer, match->insert_where);
|
||
}
|
||
|
||
#define DUMP_REGEX(re_name) do { \
|
||
if (match->re_name != NULL) { \
|
||
ystr(# re_name); \
|
||
ystr(match->re_name->pattern); \
|
||
} \
|
||
} while (0)
|
||
|
||
DUMP_REGEX(class);
|
||
DUMP_REGEX(instance);
|
||
DUMP_REGEX(window_role);
|
||
DUMP_REGEX(title);
|
||
|
||
#undef DUMP_REGEX
|
||
y(map_close);
|
||
}
|
||
|
||
if (inplace_restart) {
|
||
if (con->window != NULL) {
|
||
y(map_open);
|
||
ystr("id");
|
||
y(integer, con->window->id);
|
||
ystr("restart_mode");
|
||
y(bool, true);
|
||
y(map_close);
|
||
}
|
||
}
|
||
y(array_close);
|
||
|
||
if (inplace_restart && con->window != NULL) {
|
||
ystr("depth");
|
||
y(integer, con->depth);
|
||
}
|
||
|
||
y(map_close);
|
||
}
|
||
|
||
IPC_HANDLER(tree) {
|
||
setlocale(LC_NUMERIC, "C");
|
||
yajl_gen gen = ygenalloc();
|
||
dump_node(gen, croot, false);
|
||
setlocale(LC_NUMERIC, "");
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_TREE, payload);
|
||
y(free);
|
||
}
|
||
|
||
|
||
/*
|
||
* Formats the reply message for a GET_WORKSPACES request and sends it to the
|
||
* client
|
||
*
|
||
*/
|
||
IPC_HANDLER(get_workspaces) {
|
||
yajl_gen gen = ygenalloc();
|
||
y(array_open);
|
||
|
||
Con *focused_ws = con_get_workspace(focused);
|
||
|
||
Con *output;
|
||
TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
|
||
if (con_is_internal(output))
|
||
continue;
|
||
Con *ws;
|
||
TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
|
||
assert(ws->type == CT_WORKSPACE);
|
||
y(map_open);
|
||
|
||
ystr("num");
|
||
if (ws->num == -1)
|
||
y(null);
|
||
else y(integer, ws->num);
|
||
|
||
ystr("name");
|
||
ystr(ws->name);
|
||
|
||
ystr("visible");
|
||
y(bool, workspace_is_visible(ws));
|
||
|
||
ystr("focused");
|
||
y(bool, ws == focused_ws);
|
||
|
||
ystr("rect");
|
||
y(map_open);
|
||
ystr("x");
|
||
y(integer, ws->rect.x);
|
||
ystr("y");
|
||
y(integer, ws->rect.y);
|
||
ystr("width");
|
||
y(integer, ws->rect.width);
|
||
ystr("height");
|
||
y(integer, ws->rect.height);
|
||
y(map_close);
|
||
|
||
ystr("output");
|
||
ystr(output->name);
|
||
|
||
ystr("urgent");
|
||
y(bool, ws->urgent);
|
||
|
||
y(map_close);
|
||
}
|
||
}
|
||
|
||
y(array_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_WORKSPACES, payload);
|
||
y(free);
|
||
}
|
||
|
||
/*
|
||
* Formats the reply message for a GET_OUTPUTS request and sends it to the
|
||
* client
|
||
*
|
||
*/
|
||
IPC_HANDLER(get_outputs) {
|
||
yajl_gen gen = ygenalloc();
|
||
y(array_open);
|
||
|
||
Output *output;
|
||
TAILQ_FOREACH(output, &outputs, outputs) {
|
||
y(map_open);
|
||
|
||
ystr("name");
|
||
ystr(output->name);
|
||
|
||
ystr("active");
|
||
y(bool, output->active);
|
||
|
||
ystr("primary");
|
||
y(bool, output->primary);
|
||
|
||
ystr("rect");
|
||
y(map_open);
|
||
ystr("x");
|
||
y(integer, output->rect.x);
|
||
ystr("y");
|
||
y(integer, output->rect.y);
|
||
ystr("width");
|
||
y(integer, output->rect.width);
|
||
ystr("height");
|
||
y(integer, output->rect.height);
|
||
y(map_close);
|
||
|
||
ystr("current_workspace");
|
||
Con *ws = NULL;
|
||
if (output->con && (ws = con_get_fullscreen_con(output->con, CF_OUTPUT)))
|
||
ystr(ws->name);
|
||
else y(null);
|
||
|
||
y(map_close);
|
||
}
|
||
|
||
y(array_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_OUTPUTS, payload);
|
||
y(free);
|
||
}
|
||
|
||
/*
|
||
* Formats the reply message for a GET_MARKS request and sends it to the
|
||
* client
|
||
*
|
||
*/
|
||
IPC_HANDLER(get_marks) {
|
||
yajl_gen gen = ygenalloc();
|
||
y(array_open);
|
||
|
||
Con *con;
|
||
TAILQ_FOREACH(con, &all_cons, all_cons)
|
||
if (con->mark != NULL)
|
||
ystr(con->mark);
|
||
|
||
y(array_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_MARKS, payload);
|
||
y(free);
|
||
}
|
||
|
||
/*
|
||
* Returns the version of i3
|
||
*
|
||
*/
|
||
IPC_HANDLER(get_version) {
|
||
yajl_gen gen = ygenalloc();
|
||
y(map_open);
|
||
|
||
ystr("major");
|
||
y(integer, MAJOR_VERSION);
|
||
|
||
ystr("minor");
|
||
y(integer, MINOR_VERSION);
|
||
|
||
ystr("patch");
|
||
y(integer, PATCH_VERSION);
|
||
|
||
ystr("human_readable");
|
||
ystr(I3_VERSION);
|
||
|
||
y(map_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_VERSION, payload);
|
||
y(free);
|
||
}
|
||
|
||
/*
|
||
* Formats the reply message for a GET_BAR_CONFIG request and sends it to the
|
||
* client.
|
||
*
|
||
*/
|
||
IPC_HANDLER(get_bar_config) {
|
||
yajl_gen gen = ygenalloc();
|
||
|
||
/* If no ID was passed, we return a JSON array with all IDs */
|
||
if (message_size == 0) {
|
||
y(array_open);
|
||
Barconfig *current;
|
||
TAILQ_FOREACH(current, &barconfigs, configs) {
|
||
ystr(current->id);
|
||
}
|
||
y(array_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_BAR_CONFIG, payload);
|
||
y(free);
|
||
return;
|
||
}
|
||
|
||
/* To get a properly terminated buffer, we copy
|
||
* message_size bytes out of the buffer */
|
||
char *bar_id = scalloc(message_size + 1);
|
||
strncpy(bar_id, (const char*)message, message_size);
|
||
LOG("IPC: looking for config for bar ID \"%s\"\n", bar_id);
|
||
Barconfig *current, *config = NULL;
|
||
TAILQ_FOREACH(current, &barconfigs, configs) {
|
||
if (strcmp(current->id, bar_id) != 0)
|
||
continue;
|
||
|
||
config = current;
|
||
break;
|
||
}
|
||
|
||
y(map_open);
|
||
|
||
if (!config) {
|
||
/* If we did not find a config for the given ID, the reply will contain
|
||
* a null 'id' field. */
|
||
ystr("id");
|
||
y(null);
|
||
} else {
|
||
ystr("id");
|
||
ystr(config->id);
|
||
|
||
if (config->num_outputs > 0) {
|
||
ystr("outputs");
|
||
y(array_open);
|
||
for (int c = 0; c < config->num_outputs; c++)
|
||
ystr(config->outputs[c]);
|
||
y(array_close);
|
||
}
|
||
|
||
#define YSTR_IF_SET(name) \
|
||
do { \
|
||
if (config->name) { \
|
||
ystr( # name); \
|
||
ystr(config->name); \
|
||
} \
|
||
} while (0)
|
||
|
||
YSTR_IF_SET(tray_output);
|
||
YSTR_IF_SET(socket_path);
|
||
|
||
ystr("mode");
|
||
switch (config->mode) {
|
||
case M_HIDE:
|
||
ystr("hide");
|
||
break;
|
||
case M_INVISIBLE:
|
||
ystr("invisible");
|
||
break;
|
||
case M_DOCK:
|
||
default:
|
||
ystr("dock");
|
||
break;
|
||
}
|
||
|
||
ystr("hidden_state");
|
||
switch (config->hidden_state) {
|
||
case S_SHOW:
|
||
ystr("show");
|
||
break;
|
||
case S_HIDE:
|
||
default:
|
||
ystr("hide");
|
||
break;
|
||
}
|
||
|
||
ystr("modifier");
|
||
switch (config->modifier) {
|
||
case M_CONTROL:
|
||
ystr("ctrl");
|
||
break;
|
||
case M_SHIFT:
|
||
ystr("shift");
|
||
break;
|
||
case M_MOD1:
|
||
ystr("Mod1");
|
||
break;
|
||
case M_MOD2:
|
||
ystr("Mod2");
|
||
break;
|
||
case M_MOD3:
|
||
ystr("Mod3");
|
||
break;
|
||
/*
|
||
case M_MOD4:
|
||
ystr("Mod4");
|
||
break;
|
||
*/
|
||
case M_MOD5:
|
||
ystr("Mod5");
|
||
break;
|
||
default:
|
||
ystr("Mod4");
|
||
break;
|
||
}
|
||
|
||
ystr("position");
|
||
if (config->position == P_BOTTOM)
|
||
ystr("bottom");
|
||
else ystr("top");
|
||
|
||
YSTR_IF_SET(status_command);
|
||
YSTR_IF_SET(font);
|
||
|
||
ystr("workspace_buttons");
|
||
y(bool, !config->hide_workspace_buttons);
|
||
|
||
ystr("binding_mode_indicator");
|
||
y(bool, !config->hide_binding_mode_indicator);
|
||
|
||
ystr("verbose");
|
||
y(bool, config->verbose);
|
||
|
||
#undef YSTR_IF_SET
|
||
#define YSTR_IF_SET(name) \
|
||
do { \
|
||
if (config->colors.name) { \
|
||
ystr( # name); \
|
||
ystr(config->colors.name); \
|
||
} \
|
||
} while (0)
|
||
|
||
ystr("colors");
|
||
y(map_open);
|
||
YSTR_IF_SET(background);
|
||
YSTR_IF_SET(statusline);
|
||
YSTR_IF_SET(separator);
|
||
YSTR_IF_SET(focused_workspace_border);
|
||
YSTR_IF_SET(focused_workspace_bg);
|
||
YSTR_IF_SET(focused_workspace_text);
|
||
YSTR_IF_SET(active_workspace_border);
|
||
YSTR_IF_SET(active_workspace_bg);
|
||
YSTR_IF_SET(active_workspace_text);
|
||
YSTR_IF_SET(inactive_workspace_border);
|
||
YSTR_IF_SET(inactive_workspace_bg);
|
||
YSTR_IF_SET(inactive_workspace_text);
|
||
YSTR_IF_SET(urgent_workspace_border);
|
||
YSTR_IF_SET(urgent_workspace_bg);
|
||
YSTR_IF_SET(urgent_workspace_text);
|
||
y(map_close);
|
||
|
||
#undef YSTR_IF_SET
|
||
}
|
||
|
||
y(map_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_BAR_CONFIG, payload);
|
||
y(free);
|
||
}
|
||
|
||
/*
|
||
* Callback for the YAJL parser (will be called when a string is parsed).
|
||
*
|
||
*/
|
||
static int add_subscription(void *extra, const unsigned char *s,
|
||
ylength len) {
|
||
ipc_client *client = extra;
|
||
|
||
DLOG("should add subscription to extra %p, sub %.*s\n", client, (int)len, s);
|
||
int event = client->num_events;
|
||
|
||
client->num_events++;
|
||
client->events = realloc(client->events, client->num_events * sizeof(char*));
|
||
/* We copy the string because it is not null-terminated and strndup()
|
||
* is missing on some BSD systems */
|
||
client->events[event] = scalloc(len+1);
|
||
memcpy(client->events[event], s, len);
|
||
|
||
DLOG("client is now subscribed to:\n");
|
||
for (int i = 0; i < client->num_events; i++)
|
||
DLOG("event %s\n", client->events[i]);
|
||
DLOG("(done)\n");
|
||
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
* Subscribes this connection to the event types which were given as a JSON
|
||
* serialized array in the payload field of the message.
|
||
*
|
||
*/
|
||
IPC_HANDLER(subscribe) {
|
||
yajl_handle p;
|
||
yajl_status stat;
|
||
ipc_client *current, *client = NULL;
|
||
|
||
/* Search the ipc_client structure for this connection */
|
||
TAILQ_FOREACH(current, &all_clients, clients) {
|
||
if (current->fd != fd)
|
||
continue;
|
||
|
||
client = current;
|
||
break;
|
||
}
|
||
|
||
if (client == NULL) {
|
||
ELOG("Could not find ipc_client data structure for fd %d\n", fd);
|
||
return;
|
||
}
|
||
|
||
/* Setup the JSON parser */
|
||
static yajl_callbacks callbacks = {
|
||
.yajl_string = add_subscription,
|
||
};
|
||
|
||
p = yalloc(&callbacks, (void*)client);
|
||
stat = yajl_parse(p, (const unsigned char*)message, message_size);
|
||
if (stat != yajl_status_ok) {
|
||
unsigned char *err;
|
||
err = yajl_get_error(p, true, (const unsigned char*)message,
|
||
message_size);
|
||
ELOG("YAJL parse error: %s\n", err);
|
||
yajl_free_error(p, err);
|
||
|
||
const char *reply = "{\"success\":false}";
|
||
ipc_send_message(fd, strlen(reply), I3_IPC_REPLY_TYPE_SUBSCRIBE, (const uint8_t*)reply);
|
||
yajl_free(p);
|
||
return;
|
||
}
|
||
yajl_free(p);
|
||
const char *reply = "{\"success\":true}";
|
||
ipc_send_message(fd, strlen(reply), I3_IPC_REPLY_TYPE_SUBSCRIBE, (const uint8_t*)reply);
|
||
}
|
||
|
||
/* The index of each callback function corresponds to the numeric
|
||
* value of the message type (see include/i3/ipc.h) */
|
||
handler_t handlers[8] = {
|
||
handle_command,
|
||
handle_get_workspaces,
|
||
handle_subscribe,
|
||
handle_get_outputs,
|
||
handle_tree,
|
||
handle_get_marks,
|
||
handle_get_bar_config,
|
||
handle_get_version,
|
||
};
|
||
|
||
/*
|
||
* Handler for activity on a client connection, receives a message from a
|
||
* client.
|
||
*
|
||
* For now, the maximum message size is 2048. I’m not sure for what the
|
||
* IPC interface will be used in the future, thus I’m not implementing a
|
||
* mechanism for arbitrarily long messages, as it seems like overkill
|
||
* at the moment.
|
||
*
|
||
*/
|
||
static void ipc_receive_message(EV_P_ struct ev_io *w, int revents) {
|
||
uint32_t message_type;
|
||
uint32_t message_length;
|
||
uint8_t *message;
|
||
|
||
int ret = ipc_recv_message(w->fd, &message_type, &message_length, &message);
|
||
/* EOF or other error */
|
||
if (ret < 0) {
|
||
/* Was this a spurious read? See ev(3) */
|
||
if (ret == -1 && errno == EAGAIN)
|
||
return;
|
||
|
||
/* If not, there was some kind of error. We don’t bother
|
||
* and close the connection */
|
||
close(w->fd);
|
||
|
||
/* Delete the client from the list of clients */
|
||
ipc_client *current;
|
||
TAILQ_FOREACH(current, &all_clients, clients) {
|
||
if (current->fd != w->fd)
|
||
continue;
|
||
|
||
for (int i = 0; i < current->num_events; i++)
|
||
free(current->events[i]);
|
||
/* We can call TAILQ_REMOVE because we break out of the
|
||
* TAILQ_FOREACH afterwards */
|
||
TAILQ_REMOVE(&all_clients, current, clients);
|
||
free(current);
|
||
break;
|
||
}
|
||
|
||
ev_io_stop(EV_A_ w);
|
||
free(w);
|
||
|
||
DLOG("IPC: client disconnected\n");
|
||
return;
|
||
}
|
||
|
||
if (message_type >= (sizeof(handlers) / sizeof(handler_t)))
|
||
DLOG("Unhandled message type: %d\n", message_type);
|
||
else {
|
||
handler_t h = handlers[message_type];
|
||
h(w->fd, message, 0, message_length, message_type);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Handler for activity on the listening socket, meaning that a new client
|
||
* has just connected and we should accept() him. Sets up the event handler
|
||
* for activity on the new connection and inserts the file descriptor into
|
||
* the list of clients.
|
||
*
|
||
*/
|
||
void ipc_new_client(EV_P_ struct ev_io *w, int revents) {
|
||
struct sockaddr_un peer;
|
||
socklen_t len = sizeof(struct sockaddr_un);
|
||
int client;
|
||
if ((client = accept(w->fd, (struct sockaddr*)&peer, &len)) < 0) {
|
||
if (errno == EINTR)
|
||
return;
|
||
else perror("accept()");
|
||
return;
|
||
}
|
||
|
||
/* Close this file descriptor on exec() */
|
||
(void)fcntl(client, F_SETFD, FD_CLOEXEC);
|
||
|
||
set_nonblock(client);
|
||
|
||
struct ev_io *package = scalloc(sizeof(struct ev_io));
|
||
ev_io_init(package, ipc_receive_message, client, EV_READ);
|
||
ev_io_start(EV_A_ package);
|
||
|
||
DLOG("IPC: new client connected on fd %d\n", w->fd);
|
||
|
||
ipc_client *new = scalloc(sizeof(ipc_client));
|
||
new->fd = client;
|
||
|
||
TAILQ_INSERT_TAIL(&all_clients, new, clients);
|
||
}
|
||
|
||
/*
|
||
* Creates the UNIX domain socket at the given path, sets it to non-blocking
|
||
* mode, bind()s and listen()s on it.
|
||
*
|
||
*/
|
||
int ipc_create_socket(const char *filename) {
|
||
int sockfd;
|
||
|
||
FREE(current_socketpath);
|
||
|
||
char *resolved = resolve_tilde(filename);
|
||
DLOG("Creating IPC-socket at %s\n", resolved);
|
||
char *copy = sstrdup(resolved);
|
||
const char *dir = dirname(copy);
|
||
if (!path_exists(dir))
|
||
mkdirp(dir);
|
||
free(copy);
|
||
|
||
/* Unlink the unix domain socket before */
|
||
unlink(resolved);
|
||
|
||
if ((sockfd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0) {
|
||
perror("socket()");
|
||
free(resolved);
|
||
return -1;
|
||
}
|
||
|
||
(void)fcntl(sockfd, F_SETFD, FD_CLOEXEC);
|
||
|
||
struct sockaddr_un addr;
|
||
memset(&addr, 0, sizeof(struct sockaddr_un));
|
||
addr.sun_family = AF_LOCAL;
|
||
strncpy(addr.sun_path, resolved, sizeof(addr.sun_path) - 1);
|
||
if (bind(sockfd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0) {
|
||
perror("bind()");
|
||
free(resolved);
|
||
return -1;
|
||
}
|
||
|
||
set_nonblock(sockfd);
|
||
|
||
if (listen(sockfd, 5) < 0) {
|
||
perror("listen()");
|
||
free(resolved);
|
||
return -1;
|
||
}
|
||
|
||
current_socketpath = resolved;
|
||
return sockfd;
|
||
}
|
||
|
||
/*
|
||
* For the workspace "focus" event we send, along the usual "change" field,
|
||
* also the current and previous workspace, in "current" and "old"
|
||
* respectively.
|
||
*/
|
||
void ipc_send_workspace_focus_event(Con *current, Con *old) {
|
||
setlocale(LC_NUMERIC, "C");
|
||
yajl_gen gen = ygenalloc();
|
||
|
||
y(map_open);
|
||
|
||
ystr("change");
|
||
ystr("focus");
|
||
|
||
ystr("current");
|
||
dump_node(gen, current, false);
|
||
|
||
ystr("old");
|
||
if (old == NULL)
|
||
y(null);
|
||
else
|
||
dump_node(gen, old, false);
|
||
|
||
y(map_close);
|
||
|
||
const unsigned char *payload;
|
||
ylength length;
|
||
y(get_buf, &payload, &length);
|
||
|
||
ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, (const char *)payload);
|
||
y(free);
|
||
setlocale(LC_NUMERIC, "");
|
||
}
|