* 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.
+ * © 2009-2012 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 <getopt.h>
#include <limits.h>
+#include <yajl/yajl_parse.h>
+#include <yajl/yajl_version.h>
+
#include <xcb/xcb.h>
#include <xcb/xcb_aux.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_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;
- }
+void verboselog(char *fmt, ...) {
+ va_list args;
+
+ va_start(args, fmt);
+ vfprintf(stdout, fmt, args);
+ va_end(args);
}
-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;
- }
+void errorlog(char *fmt, ...) {
+ va_list args;
+
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+}
- if (memcmp(walk, I3_IPC_MAGIC, strlen(I3_IPC_MAGIC)) != 0)
- errx(EXIT_FAILURE, "invalid magic in reply");
+static char *last_key = NULL;
- 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);
+typedef struct reply_t {
+ bool success;
+ char *error;
+ char *input;
+ char *errorposition;
+} reply_t;
- *reply = smalloc(*reply_length);
+static reply_t last_reply;
- 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");
+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;
+}
- read_bytes += n;
- to_read -= n;
+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[]) {
socket_path = getenv("I3SOCK");
int o, option_index = 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\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') {
}
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)
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");
+ err(EXIT_FAILURE, "Could not connect to i3 on socket \"%s\"", socket_path);
- 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;
+ uint32_t reply_type;
uint8_t *reply;
- ipc_recv_message(sockfd, message_type, &reply_length, &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);
projects / i3 / i3 / blobdiff