+/*
+ * vim:ts=8:expandtab
+ *
+ * i3 - an improved dynamic tiling window manager
+ *
+ * © 2009 Michael Stapelberg and contributors
+ *
+ * See file LICENSE for license information.
+ *
+ * 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.
+ * Additionally, it’s even useful sometimes :-).
+ *
+ */
+#include <ev.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <err.h>
+#include <stdint.h>
+#include <getopt.h>
+
+static void ipc_send_message(int sockfd, uint32_t message_size,
+ uint32_t message_type, uint8_t *payload) {
+ int buffer_size = strlen("i3-ipc") + sizeof(uint32_t) + sizeof(uint32_t) + message_size;
+ char msg[buffer_size];
+ char *walk = msg;
+
+ strcpy(walk, "i3-ipc");
+ walk += strlen("i3-ipc");
+ 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;
+ }
+}
+
+int main(int argc, char *argv[]) {
+ char *socket_path = "/tmp/i3-ipc.sock";
+ int o, option_index = 0;
+
+ static struct option long_options[] = {
+ {"socket", required_argument, 0, 's'},
+ {"type", required_argument, 0, 't'},
+ {"version", no_argument, 0, 'v'},
+ {"help", no_argument, 0, 'h'},
+ {0, 0, 0, 0}
+ };
+
+ char *options_string = "s:t:vh";
+
+ while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
+ if (o == 's') {
+ socket_path = strdup(optarg);
+ break;
+ } else if (o == 't') {
+ printf("currently only commands are implemented\n");
+ } else if (o == 'v') {
+ printf("i3-msg " I3_VERSION);
+ return 0;
+ } else if (o == 'h') {
+ printf("i3-msg " I3_VERSION);
+ printf("i3-msg [-s <socket>] [-t <type>] <message>\n");
+ return 0;
+ }
+ }
+
+ if (optind >= argc) {
+ fprintf(stderr, "Error: missing message\n");
+ fprintf(stderr, "i3-msg [-s <socket>] [-t <type>] <message>\n");
+ return 1;
+ }
+
+ int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
+ struct sockaddr_un addr;
+ memset(&addr, 0, sizeof(struct sockaddr_un));
+ addr.sun_family = AF_LOCAL;
+ strcpy(addr.sun_path, socket_path);
+ if (connect(sockfd, &addr, sizeof(struct sockaddr_un)) < 0)
+ err(-1, "Could not connect to i3");
+
+ ipc_send_message(sockfd, strlen(argv[optind]), 0, (uint8_t*)argv[optind]);
+
+ close(sockfd);
+
+ return 0;
+}