X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=i3-msg%2Fmain.c;h=a1428fb8f5f89aac9e35f68420f983b808ee7303;hb=d5358a749e3f4eed45144a2c78032c4163ea2367;hp=2d7cef0e907eb3005b52798f46f4ca39e3d88af8;hpb=de7c2841ed362531f52e258bd36554d4a5fde07b;p=i3%2Fi3 diff --git a/i3-msg/main.c b/i3-msg/main.c index 2d7cef0e..a1428fb8 100644 --- a/i3-msg/main.c +++ b/i3-msg/main.c @@ -2,19 +2,18 @@ * 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 #include #include #include @@ -29,125 +28,110 @@ #include #include +#include +#include + #include #include +#include "libi3.h" #include static char *socket_path; /* - * Try to get the socket path from X11 and return NULL if it doesn’t work. - * As i3-msg is a short-running tool, we don’t bother with cleaning up the - * connection and leave it up to the operating system on exit. + * Having verboselog() and errorlog() is necessary when using libi3. * */ -static char *socket_path_from_x11() { - xcb_connection_t *conn; - int screen; - if ((conn = xcb_connect(NULL, &screen)) == NULL || - xcb_connection_has_error(conn)) - return NULL; - xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screen); - xcb_window_t root = root_screen->root; - - xcb_intern_atom_cookie_t atom_cookie; - xcb_intern_atom_reply_t *atom_reply; - - atom_cookie = xcb_intern_atom(conn, 0, strlen("I3_SOCKET_PATH"), "I3_SOCKET_PATH"); - atom_reply = xcb_intern_atom_reply(conn, atom_cookie, NULL); - if (atom_reply == NULL) - return NULL; - - xcb_get_property_cookie_t prop_cookie; - xcb_get_property_reply_t *prop_reply; - prop_cookie = xcb_get_property_unchecked(conn, false, root, atom_reply->atom, - XCB_GET_PROPERTY_TYPE_ANY, 0, PATH_MAX); - prop_reply = xcb_get_property_reply(conn, prop_cookie, NULL); - if (prop_reply == NULL || xcb_get_property_value_length(prop_reply) == 0) - return NULL; - if (asprintf(&socket_path, "%.*s", xcb_get_property_value_length(prop_reply), - (char*)xcb_get_property_value(prop_reply)) == -1) - return NULL; - return socket_path; +void verboselog(char *fmt, ...) { + va_list args; + + va_start(args, fmt); + vfprintf(stdout, fmt, args); + va_end(args); } -/* - * Formats a message (payload) of the given size and type and sends it to i3 via - * the given socket file descriptor. - * - */ -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 errorlog(char *fmt, ...) { + va_list args; + + va_start(args, fmt); + vfprintf(stderr, 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; - } +static char *last_key = NULL; - if (memcmp(walk, I3_IPC_MAGIC, strlen(I3_IPC_MAGIC)) != 0) - errx(EXIT_FAILURE, "invalid magic in reply"); - - 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); - - *reply = malloc(*reply_length); - if ((*reply) == NULL) - err(EXIT_FAILURE, "malloc() failed"); - - 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"); - - read_bytes += n; - to_read -= n; +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[]) { socket_path = getenv("I3SOCK"); int o, option_index = 0; @@ -170,7 +154,7 @@ int main(int argc, char *argv[]) { if (o == 's') { if (socket_path != NULL) free(socket_path); - socket_path = strdup(optarg); + socket_path = sstrdup(optarg); } else if (o == 't') { if (strcasecmp(optarg, "command") == 0) message_type = I3_IPC_MESSAGE_TYPE_COMMAND; @@ -182,9 +166,13 @@ int main(int argc, char *argv[]) { 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') { @@ -200,19 +188,18 @@ int main(int argc, char *argv[]) { } 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) - socket_path = strdup("/tmp/i3-ipc.sock"); + 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) { - if (!(payload = strdup(argv[optind]))) - err(EXIT_FAILURE, "strdup(argv[optind])"); + payload = sstrdup(argv[optind]); } else { char *both; if (asprintf(&both, "%s %s", payload, argv[optind]) == -1) @@ -235,16 +222,51 @@ int main(int argc, char *argv[]) { 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);