/*
- * vim:ts=8:expandtab
+ * vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
- *
- * © 2009 Michael Stapelberg and contributors
- *
- * See file LICENSE for license information.
+ * © 2009-2012 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 <ev.h>
#include <stdio.h>
+#include <stdbool.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.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;
/*
- * Formats a message (payload) of the given size and type and sends it to i3 via
- * the given socket file descriptor.
+ * Having verboselog() and errorlog() is necessary when using libi3.
*
*/
-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;
- }
+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;
+}
+
+#if YAJL_MAJOR >= 2
+static int reply_string_cb(void *params, const unsigned char *val, size_t len) {
+#else
+static int reply_string_cb(void *params, const unsigned char *val, unsigned int len) {
+#endif
+ 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;
+}
+
+
+#if YAJL_MAJOR >= 2
+static int reply_map_key_cb(void *params, const unsigned char *keyVal, size_t keyLen) {
+#else
+static int reply_map_key_cb(void *params, const unsigned char *keyVal, unsigned keyLen) {
+#endif
+ free(last_key);
+ last_key = scalloc(keyLen + 1);
+ strncpy(last_key, (const char*)keyVal, keyLen);
+ return 1;
+}
+
+yajl_callbacks reply_callbacks = {
+ NULL,
+ &reply_boolean_cb,
+ NULL,
+ NULL,
+ NULL,
+ &reply_string_cb,
+ &reply_start_map_cb,
+ &reply_map_key_cb,
+ &reply_end_map_cb,
+ NULL,
+ NULL
+};
+
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;
- }
+ socket_path = getenv("I3SOCK");
+ int o, option_index = 0;
+ int 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");
+
+ /* Fall back to the default socket path */
+ if (socket_path == NULL)
+ socket_path = sstrdup("/tmp/i3-ipc.sock");
- if (optind >= argc) {
- fprintf(stderr, "Error: missing message\n");
- fprintf(stderr, "i3-msg [-s <socket>] [-t <type>] <message>\n");
- return 1;
+ /* 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++;
+ }
- int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
- if (sockfd == -1)
- err(EXIT_FAILURE, "Could not create socket");
+ if (!payload)
+ payload = "";
- 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, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
- err(EXIT_FAILURE, "Could not connect to i3");
+ int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
+ if (sockfd == -1)
+ err(EXIT_FAILURE, "Could not create socket");
- ipc_send_message(sockfd, strlen(argv[optind]), 0, (uint8_t*)argv[optind]);
+ 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);
- close(sockfd);
+ 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;
+#if YAJL_MAJOR < 2
+ yajl_parser_config parse_conf = { 0, 0 };
+
+ handle = yajl_alloc(&reply_callbacks, &parse_conf, NULL, NULL);
+#else
+ handle = yajl_alloc(&reply_callbacks, NULL, NULL);
+#endif
+ yajl_status state = yajl_parse(handle, (const unsigned char*)reply, reply_length);
+ switch (state) {
+ case yajl_status_ok:
+ break;
+ case yajl_status_client_canceled:
+#if YAJL_MAJOR < 2
+ case yajl_status_insufficient_data:
+#endif
+ 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;
}
projects / i3 / i3 / blobdiff