* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
- *
- * © 2009-2010 Michael Stapelberg and contributors
- *
- * See file LICENSE for license information.
+ * © 2009-2010 Michael Stapelberg and contributors (see also: LICENSE)
*
* i3-msg/main.c: Utility which sends messages to a running i3-instance using
* IPC via UNIX domain sockets.
*
- * This serves as an example for how to send your own messages to i3.
+ * This (in combination with libi3/ipc_send_message.c and
+ * libi3/ipc_recv_message.c) serves as an example for how to send your own
+ * messages to i3.
+ *
* Additionally, it’s even useful sometimes :-).
*
*/
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
+#include "libi3.h"
#include <i3/ipc.h>
static char *socket_path;
-/*
- * Try to get the socket path from X11 and return NULL if it doesn’t work.
- * As i3-msg is a short-running tool, we don’t bother with cleaning up the
- * connection and leave it up to the operating system on exit.
- *
- */
-static char *socket_path_from_x11() {
- xcb_connection_t *conn;
- int screen;
- if ((conn = xcb_connect(NULL, &screen)) == NULL ||
- xcb_connection_has_error(conn))
- return NULL;
- xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screen);
- xcb_window_t root = root_screen->root;
-
- xcb_intern_atom_cookie_t atom_cookie;
- xcb_intern_atom_reply_t *atom_reply;
-
- atom_cookie = xcb_intern_atom(conn, 0, strlen("I3_SOCKET_PATH"), "I3_SOCKET_PATH");
- atom_reply = xcb_intern_atom_reply(conn, atom_cookie, NULL);
- if (atom_reply == NULL)
- return NULL;
-
- xcb_get_property_cookie_t prop_cookie;
- xcb_get_property_reply_t *prop_reply;
- prop_cookie = xcb_get_property_unchecked(conn, false, root, atom_reply->atom,
- XCB_GET_PROPERTY_TYPE_ANY, 0, PATH_MAX);
- prop_reply = xcb_get_property_reply(conn, prop_cookie, NULL);
- if (prop_reply == NULL || xcb_get_property_value_length(prop_reply) == 0)
- return NULL;
- if (asprintf(&socket_path, "%.*s", xcb_get_property_value_length(prop_reply),
- (char*)xcb_get_property_value(prop_reply)) == -1)
- return NULL;
- return socket_path;
-}
-
-/*
- * Formats a message (payload) of the given size and type and sends it to i3 via
- * the given socket file descriptor.
- *
- */
-static void ipc_send_message(int sockfd, uint32_t message_size,
- uint32_t message_type, uint8_t *payload) {
- int buffer_size = strlen(I3_IPC_MAGIC) + sizeof(uint32_t) + sizeof(uint32_t) + message_size;
- char msg[buffer_size];
- char *walk = msg;
-
- strcpy(walk, I3_IPC_MAGIC);
- walk += strlen(I3_IPC_MAGIC);
- memcpy(walk, &message_size, sizeof(uint32_t));
- walk += sizeof(uint32_t);
- memcpy(walk, &message_type, sizeof(uint32_t));
- walk += sizeof(uint32_t);
- memcpy(walk, payload, message_size);
-
- int sent_bytes = 0;
- int bytes_to_go = buffer_size;
- while (sent_bytes < bytes_to_go) {
- int n = write(sockfd, msg + sent_bytes, bytes_to_go);
- if (n == -1)
- err(EXIT_FAILURE, "write() failed");
-
- sent_bytes += n;
- bytes_to_go -= n;
- }
-}
-
-static void ipc_recv_message(int sockfd, uint32_t message_type,
- uint32_t *reply_length, uint8_t **reply) {
- /* Read the message header first */
- uint32_t to_read = strlen(I3_IPC_MAGIC) + sizeof(uint32_t) + sizeof(uint32_t);
- char msg[to_read];
- char *walk = msg;
-
- uint32_t read_bytes = 0;
- while (read_bytes < to_read) {
- int n = read(sockfd, msg + read_bytes, to_read);
- if (n == -1)
- err(EXIT_FAILURE, "read() failed");
- if (n == 0)
- errx(EXIT_FAILURE, "received EOF instead of reply");
-
- read_bytes += n;
- to_read -= n;
- }
-
- if (memcmp(walk, I3_IPC_MAGIC, strlen(I3_IPC_MAGIC)) != 0)
- errx(EXIT_FAILURE, "invalid magic in reply");
-
- walk += strlen(I3_IPC_MAGIC);
- *reply_length = *((uint32_t*)walk);
- walk += sizeof(uint32_t);
- if (*((uint32_t*)walk) != message_type)
- errx(EXIT_FAILURE, "unexpected reply type (got %d, expected %d)", *((uint32_t*)walk), message_type);
- walk += sizeof(uint32_t);
-
- *reply = malloc(*reply_length);
- if ((*reply) == NULL)
- err(EXIT_FAILURE, "malloc() failed");
-
- to_read = *reply_length;
- read_bytes = 0;
- while (read_bytes < to_read) {
- int n = read(sockfd, *reply + read_bytes, to_read);
- if (n == -1)
- err(EXIT_FAILURE, "read() failed");
-
- read_bytes += n;
- to_read -= n;
- }
-}
-
int main(int argc, char *argv[]) {
socket_path = getenv("I3SOCK");
int o, option_index = 0;
if (o == 's') {
if (socket_path != NULL)
free(socket_path);
- socket_path = strdup(optarg);
+ socket_path = sstrdup(optarg);
} else if (o == 't') {
if (strcasecmp(optarg, "command") == 0)
message_type = I3_IPC_MESSAGE_TYPE_COMMAND;
message_type = I3_IPC_MESSAGE_TYPE_GET_TREE;
else if (strcasecmp(optarg, "get_marks") == 0)
message_type = I3_IPC_MESSAGE_TYPE_GET_MARKS;
+ else if (strcasecmp(optarg, "get_bar_config") == 0)
+ message_type = I3_IPC_MESSAGE_TYPE_GET_BAR_CONFIG;
else {
printf("Unknown message type\n");
- printf("Known types: command, get_workspaces, get_outputs, get_tree, get_marks\n");
+ printf("Known types: command, get_workspaces, get_outputs, get_tree, get_marks, get_bar_config\n");
exit(EXIT_FAILURE);
}
} else if (o == 'q') {
}
if (socket_path == NULL)
- socket_path = socket_path_from_x11();
+ socket_path = root_atom_contents("I3_SOCKET_PATH");
/* Fall back to the default socket path */
if (socket_path == NULL)
- socket_path = strdup("/tmp/i3-ipc.sock");
+ socket_path = sstrdup("/tmp/i3-ipc.sock");
/* Use all arguments, separated by whitespace, as payload.
* This way, you don’t have to do i3-msg 'mark foo', you can use
* i3-msg mark foo */
while (optind < argc) {
if (!payload) {
- if (!(payload = strdup(argv[optind])))
- err(EXIT_FAILURE, "strdup(argv[optind])");
+ payload = sstrdup(argv[optind]);
} else {
char *both;
if (asprintf(&both, "%s %s", payload, argv[optind]) == -1)
if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
err(EXIT_FAILURE, "Could not connect to i3");
- ipc_send_message(sockfd, strlen(payload), message_type, (uint8_t*)payload);
+ if (ipc_send_message(sockfd, strlen(payload), message_type, (uint8_t*)payload) == -1)
+ err(EXIT_FAILURE, "IPC: write()");
if (quiet)
return 0;
uint32_t reply_length;
uint8_t *reply;
- ipc_recv_message(sockfd, message_type, &reply_length, &reply);
- printf("%.*s", reply_length, reply);
+ int ret;
+ if ((ret = ipc_recv_message(sockfd, message_type, &reply_length, &reply)) != 0) {
+ if (ret == -1)
+ err(EXIT_FAILURE, "IPC: read()");
+ exit(1);
+ }
+ printf("%.*s\n", reply_length, reply);
free(reply);
close(sockfd);
projects / i3 / i3 / blobdiff