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main.c
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main.c
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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 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 (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 <stdio.h>
#include <stdbool.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>
#include <limits.h>
#include <yajl/yajl_parse.h>
#include <yajl/yajl_version.h>
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
#include "libi3.h"
#include <i3/ipc.h>
static char *socket_path;
/*
* Having verboselog() and errorlog() is necessary when using libi3.
*
*/
void verboselog(char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stdout, fmt, args);
va_end(args);
}
void errorlog(char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
}
static char *last_key = NULL;
typedef struct reply_t {
bool success;
char *error;
char *input;
char *errorposition;
} reply_t;
static reply_t last_reply;
static int reply_boolean_cb(void *params, int val) {
if (strcmp(last_key, "success") == 0)
last_reply.success = val;
return 1;
}
static int reply_string_cb(void *params, const unsigned char *val, size_t len) {
char *str = scalloc(len + 1);
strncpy(str, (const char *)val, len);
if (strcmp(last_key, "error") == 0)
last_reply.error = str;
else if (strcmp(last_key, "input") == 0)
last_reply.input = str;
else if (strcmp(last_key, "errorposition") == 0)
last_reply.errorposition = str;
else
free(str);
return 1;
}
static int reply_start_map_cb(void *params) {
return 1;
}
static int reply_end_map_cb(void *params) {
if (!last_reply.success) {
fprintf(stderr, "ERROR: Your command: %s\n", last_reply.input);
fprintf(stderr, "ERROR: %s\n", last_reply.errorposition);
fprintf(stderr, "ERROR: %s\n", last_reply.error);
}
return 1;
}
static int reply_map_key_cb(void *params, const unsigned char *keyVal, size_t keyLen) {
free(last_key);
last_key = scalloc(keyLen + 1);
strncpy(last_key, (const char *)keyVal, keyLen);
return 1;
}
static yajl_callbacks reply_callbacks = {
.yajl_boolean = reply_boolean_cb,
.yajl_string = reply_string_cb,
.yajl_start_map = reply_start_map_cb,
.yajl_map_key = reply_map_key_cb,
.yajl_end_map = reply_end_map_cb,
};
int main(int argc, char *argv[]) {
socket_path = getenv("I3SOCK");
int o, option_index = 0;
uint32_t message_type = I3_IPC_MESSAGE_TYPE_COMMAND;
char *payload = NULL;
bool quiet = false;
static struct option long_options[] = {
{"socket", required_argument, 0, 's'},
{"type", required_argument, 0, 't'},
{"version", no_argument, 0, 'v'},
{"quiet", no_argument, 0, 'q'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}};
char *options_string = "s:t:vhq";
while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
if (o == 's') {
if (socket_path != NULL)
free(socket_path);
socket_path = sstrdup(optarg);
} else if (o == 't') {
if (strcasecmp(optarg, "command") == 0)
message_type = I3_IPC_MESSAGE_TYPE_COMMAND;
else if (strcasecmp(optarg, "get_workspaces") == 0)
message_type = I3_IPC_MESSAGE_TYPE_GET_WORKSPACES;
else if (strcasecmp(optarg, "get_outputs") == 0)
message_type = I3_IPC_MESSAGE_TYPE_GET_OUTPUTS;
else if (strcasecmp(optarg, "get_tree") == 0)
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 if (strcasecmp(optarg, "get_version") == 0)
message_type = I3_IPC_MESSAGE_TYPE_GET_VERSION;
else {
printf("Unknown message type\n");
printf("Known types: command, get_workspaces, get_outputs, get_tree, get_marks, get_bar_config, get_version\n");
exit(EXIT_FAILURE);
}
} else if (o == 'q') {
quiet = true;
} else if (o == 'v') {
printf("i3-msg " I3_VERSION "\n");
return 0;
} else if (o == 'h') {
printf("i3-msg " I3_VERSION "\n");
printf("i3-msg [-s <socket>] [-t <type>] <message>\n");
return 0;
}
}
if (socket_path == NULL)
socket_path = root_atom_contents("I3_SOCKET_PATH", NULL, 0);
/* Fall back to the default socket path */
if (socket_path == NULL)
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) {
payload = sstrdup(argv[optind]);
} else {
char *both;
if (asprintf(&both, "%s %s", payload, argv[optind]) == -1)
err(EXIT_FAILURE, "asprintf");
free(payload);
payload = both;
}
optind++;
}
if (!payload)
payload = "";
int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
if (sockfd == -1)
err(EXIT_FAILURE, "Could not create socket");
struct sockaddr_un addr;
memset(&addr, 0, sizeof(struct sockaddr_un));
addr.sun_family = AF_LOCAL;
strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
err(EXIT_FAILURE, "Could not connect to i3 on socket \"%s\"", socket_path);
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;
uint32_t reply_type;
uint8_t *reply;
int ret;
if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
if (ret == -1)
err(EXIT_FAILURE, "IPC: read()");
exit(1);
}
if (reply_type != message_type)
errx(EXIT_FAILURE, "IPC: Received reply of type %d but expected %d", reply_type, message_type);
/* For the reply of commands, have a look if that command was successful.
* If not, nicely format the error message. */
if (reply_type == I3_IPC_MESSAGE_TYPE_COMMAND) {
yajl_handle handle;
handle = yajl_alloc(&reply_callbacks, NULL, NULL);
yajl_status state = yajl_parse(handle, (const unsigned char *)reply, reply_length);
switch (state) {
case yajl_status_ok:
break;
case yajl_status_client_canceled:
case yajl_status_error:
errx(EXIT_FAILURE, "IPC: Could not parse JSON reply.");
}
/* NB: We still fall-through and print the reply, because even if one
* command failed, that doesn’t mean that all commands failed. */
}
printf("%.*s\n", reply_length, reply);
free(reply);
close(sockfd);
return 0;
}