d3beff2339
This removes code duplication, which will be useful for a subsequent commit. Furthermore, we now don’t open X11 connections unnecessarily in some corner cases.
277 lines
8.0 KiB
C
277 lines
8.0 KiB
C
/*
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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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* i3-msg/main.c: Utility which sends messages to a running i3-instance using
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* IPC via UNIX domain sockets.
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*
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* This (in combination with libi3/ipc_send_message.c and
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* libi3/ipc_recv_message.c) serves as an example for how to send your own
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* messages to i3.
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*
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* Additionally, it’s even useful sometimes :-).
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*
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <err.h>
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#include <stdint.h>
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#include <getopt.h>
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#include <limits.h>
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#include <yajl/yajl_parse.h>
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#include <yajl/yajl_version.h>
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#include <xcb/xcb.h>
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#include <xcb/xcb_aux.h>
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#include "libi3.h"
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#include <i3/ipc.h>
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static char *socket_path;
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/*
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* Having verboselog() and errorlog() is necessary when using libi3.
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*
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*/
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void verboselog(char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stdout, fmt, args);
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va_end(args);
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}
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void errorlog(char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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}
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static char *last_key = NULL;
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typedef struct reply_t {
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bool success;
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char *error;
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char *input;
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char *errorposition;
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} reply_t;
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static reply_t last_reply;
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static int reply_boolean_cb(void *params, int val) {
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if (strcmp(last_key, "success") == 0)
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last_reply.success = val;
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return 1;
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}
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#if YAJL_MAJOR >= 2
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static int reply_string_cb(void *params, const unsigned char *val, size_t len) {
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#else
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static int reply_string_cb(void *params, const unsigned char *val, unsigned int len) {
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#endif
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char *str = scalloc(len + 1);
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strncpy(str, (const char*)val, len);
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if (strcmp(last_key, "error") == 0)
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last_reply.error = str;
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else if (strcmp(last_key, "input") == 0)
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last_reply.input = str;
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else if (strcmp(last_key, "errorposition") == 0)
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last_reply.errorposition = str;
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else free(str);
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return 1;
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}
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static int reply_start_map_cb(void *params) {
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return 1;
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}
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static int reply_end_map_cb(void *params) {
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if (!last_reply.success) {
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fprintf(stderr, "ERROR: Your command: %s\n", last_reply.input);
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fprintf(stderr, "ERROR: %s\n", last_reply.errorposition);
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fprintf(stderr, "ERROR: %s\n", last_reply.error);
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}
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return 1;
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}
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#if YAJL_MAJOR >= 2
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static int reply_map_key_cb(void *params, const unsigned char *keyVal, size_t keyLen) {
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#else
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static int reply_map_key_cb(void *params, const unsigned char *keyVal, unsigned keyLen) {
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#endif
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free(last_key);
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last_key = scalloc(keyLen + 1);
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strncpy(last_key, (const char*)keyVal, keyLen);
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return 1;
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}
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yajl_callbacks reply_callbacks = {
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NULL,
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&reply_boolean_cb,
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NULL,
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NULL,
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NULL,
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&reply_string_cb,
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&reply_start_map_cb,
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&reply_map_key_cb,
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&reply_end_map_cb,
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NULL,
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NULL
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};
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int main(int argc, char *argv[]) {
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socket_path = getenv("I3SOCK");
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int o, option_index = 0;
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int message_type = I3_IPC_MESSAGE_TYPE_COMMAND;
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char *payload = NULL;
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bool quiet = false;
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static struct option long_options[] = {
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{"socket", required_argument, 0, 's'},
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{"type", required_argument, 0, 't'},
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{"version", no_argument, 0, 'v'},
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{"quiet", no_argument, 0, 'q'},
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{"help", no_argument, 0, 'h'},
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{0, 0, 0, 0}
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};
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char *options_string = "s:t:vhq";
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while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
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if (o == 's') {
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if (socket_path != NULL)
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free(socket_path);
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socket_path = sstrdup(optarg);
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} else if (o == 't') {
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if (strcasecmp(optarg, "command") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_COMMAND;
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else if (strcasecmp(optarg, "get_workspaces") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_GET_WORKSPACES;
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else if (strcasecmp(optarg, "get_outputs") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_GET_OUTPUTS;
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else if (strcasecmp(optarg, "get_tree") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_GET_TREE;
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else if (strcasecmp(optarg, "get_marks") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_GET_MARKS;
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else if (strcasecmp(optarg, "get_bar_config") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_GET_BAR_CONFIG;
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else if (strcasecmp(optarg, "get_version") == 0)
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message_type = I3_IPC_MESSAGE_TYPE_GET_VERSION;
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else {
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printf("Unknown message type\n");
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printf("Known types: command, get_workspaces, get_outputs, get_tree, get_marks, get_bar_config, get_version\n");
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exit(EXIT_FAILURE);
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}
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} else if (o == 'q') {
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quiet = true;
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} else if (o == 'v') {
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printf("i3-msg " I3_VERSION "\n");
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return 0;
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} else if (o == 'h') {
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printf("i3-msg " I3_VERSION "\n");
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printf("i3-msg [-s <socket>] [-t <type>] <message>\n");
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return 0;
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}
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}
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if (socket_path == NULL)
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socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
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/* Fall back to the default socket path */
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if (socket_path == NULL)
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socket_path = sstrdup("/tmp/i3-ipc.sock");
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/* Use all arguments, separated by whitespace, as payload.
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* This way, you don’t have to do i3-msg 'mark foo', you can use
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* i3-msg mark foo */
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while (optind < argc) {
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if (!payload) {
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payload = sstrdup(argv[optind]);
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} else {
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char *both;
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if (asprintf(&both, "%s %s", payload, argv[optind]) == -1)
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err(EXIT_FAILURE, "asprintf");
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free(payload);
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payload = both;
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}
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optind++;
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}
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if (!payload)
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payload = "";
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int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
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if (sockfd == -1)
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err(EXIT_FAILURE, "Could not create socket");
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struct sockaddr_un addr;
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memset(&addr, 0, sizeof(struct sockaddr_un));
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addr.sun_family = AF_LOCAL;
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strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
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if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
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err(EXIT_FAILURE, "Could not connect to i3 on socket \"%s\"", socket_path);
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if (ipc_send_message(sockfd, strlen(payload), message_type, (uint8_t*)payload) == -1)
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err(EXIT_FAILURE, "IPC: write()");
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if (quiet)
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return 0;
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uint32_t reply_length;
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uint32_t reply_type;
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uint8_t *reply;
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int ret;
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if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
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if (ret == -1)
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err(EXIT_FAILURE, "IPC: read()");
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exit(1);
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}
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if (reply_type != message_type)
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errx(EXIT_FAILURE, "IPC: Received reply of type %d but expected %d", reply_type, message_type);
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/* For the reply of commands, have a look if that command was successful.
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* If not, nicely format the error message. */
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if (reply_type == I3_IPC_MESSAGE_TYPE_COMMAND) {
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yajl_handle handle;
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#if YAJL_MAJOR < 2
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yajl_parser_config parse_conf = { 0, 0 };
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handle = yajl_alloc(&reply_callbacks, &parse_conf, NULL, NULL);
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#else
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handle = yajl_alloc(&reply_callbacks, NULL, NULL);
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#endif
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yajl_status state = yajl_parse(handle, (const unsigned char*)reply, reply_length);
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switch (state) {
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case yajl_status_ok:
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break;
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case yajl_status_client_canceled:
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#if YAJL_MAJOR < 2
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case yajl_status_insufficient_data:
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#endif
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case yajl_status_error:
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errx(EXIT_FAILURE, "IPC: Could not parse JSON reply.");
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}
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/* NB: We still fall-through and print the reply, because even if one
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* command failed, that doesn’t mean that all commands failed. */
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}
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printf("%.*s\n", reply_length, reply);
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free(reply);
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close(sockfd);
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return 0;
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}
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