2 #define I3__FILE__ "key_press.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
9 * display_version.c: displays the running i3 version, runs as part of
13 #include <sys/types.h>
16 #include <sys/socket.h>
22 static bool human_readable_key, loaded_config_file_name_key;
23 static char *human_readable_version, *loaded_config_file_name;
25 static int version_string(void *ctx, const unsigned char *val, size_t len) {
26 if (human_readable_key)
27 sasprintf(&human_readable_version, "%.*s", (int)len, val);
28 if (loaded_config_file_name_key)
29 sasprintf(&loaded_config_file_name, "%.*s", (int)len, val);
33 static int version_map_key(void *ctx, const unsigned char *stringval, size_t stringlen) {
34 human_readable_key = (stringlen == strlen("human_readable") &&
35 strncmp((const char *)stringval, "human_readable", strlen("human_readable")) == 0);
36 loaded_config_file_name_key = (stringlen == strlen("loaded_config_file_name") &&
37 strncmp((const char *)stringval, "loaded_config_file_name", strlen("loaded_config_file_name")) == 0);
41 static yajl_callbacks version_callbacks = {
42 .yajl_string = version_string,
43 .yajl_map_key = version_map_key,
47 * Connects to i3 to find out the currently running version. Useful since it
48 * might be different from the version compiled into this binary (maybe the
49 * user didn’t correctly install i3 or forgot te restart it).
51 * The output looks like this:
52 * Running i3 version: 4.2-202-gb8e782c (2012-08-12, branch "next") (pid 14804)
54 * The i3 binary you just called: /home/michael/i3/i3
55 * The i3 binary you are running: /home/michael/i3/i3
58 void display_running_version(void) {
59 char *socket_path = root_atom_contents("I3_SOCKET_PATH", conn, conn_screen);
60 if (socket_path == NULL)
63 char *pid_from_atom = root_atom_contents("I3_PID", conn, conn_screen);
64 if (pid_from_atom == NULL) {
65 /* If I3_PID is not set, the running version is older than 4.2-200. */
66 printf("\nRunning version: < 4.2-200\n");
70 /* Inform the user of what we are doing. While a single IPC request is
71 * really fast normally, in case i3 hangs, this will not terminate. */
72 printf("(Getting version from running i3, press ctrl-c to abort…)");
75 /* TODO: refactor this with the code for sending commands */
76 int sockfd = socket(AF_LOCAL, SOCK_STREAM, 0);
78 err(EXIT_FAILURE, "Could not create socket");
80 struct sockaddr_un addr;
81 memset(&addr, 0, sizeof(struct sockaddr_un));
82 addr.sun_family = AF_LOCAL;
83 strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
84 if (connect(sockfd, (const struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0)
85 err(EXIT_FAILURE, "Could not connect to i3");
87 if (ipc_send_message(sockfd, 0, I3_IPC_MESSAGE_TYPE_GET_VERSION,
89 err(EXIT_FAILURE, "IPC: write()");
91 uint32_t reply_length;
95 if ((ret = ipc_recv_message(sockfd, &reply_type, &reply_length, &reply)) != 0) {
97 err(EXIT_FAILURE, "IPC: read()");
101 if (reply_type != I3_IPC_MESSAGE_TYPE_GET_VERSION)
102 errx(EXIT_FAILURE, "Got reply type %d, but expected %d (GET_VERSION)", reply_type, I3_IPC_MESSAGE_TYPE_GET_VERSION);
104 yajl_handle handle = yajl_alloc(&version_callbacks, NULL, NULL);
106 yajl_status state = yajl_parse(handle, (const unsigned char *)reply, (int)reply_length);
107 if (state != yajl_status_ok)
108 errx(EXIT_FAILURE, "Could not parse my own reply. That's weird. reply is %.*s", (int)reply_length, reply);
110 printf("\rRunning i3 version: %s (pid %s)\n", human_readable_version, pid_from_atom);
112 if (loaded_config_file_name) {
116 printf("Loaded i3 config: %s", loaded_config_file_name);
117 if (stat(loaded_config_file_name, &sb) == -1) {
119 ELOG("Cannot stat config file \"%s\"\n", loaded_config_file_name);
121 strftime(mtime, sizeof(mtime), "%c", localtime(&(sb.st_mtime)));
123 printf(" (Last modified: %s, %.f seconds ago)\n", mtime, difftime(now, sb.st_mtime));
128 size_t destpath_size = 1024;
131 char *destpath = smalloc(destpath_size);
133 sasprintf(&exepath, "/proc/%d/exe", getpid());
135 while ((linksize = readlink(exepath, destpath, destpath_size)) == (ssize_t)destpath_size) {
136 destpath_size = destpath_size * 2;
137 destpath = srealloc(destpath, destpath_size);
140 err(EXIT_FAILURE, "readlink(%s)", exepath);
142 /* readlink() does not NULL-terminate strings, so we have to. */
143 destpath[linksize] = '\0';
146 printf("The i3 binary you just called: %s\n", destpath);
149 sasprintf(&exepath, "/proc/%s/exe", pid_from_atom);
151 while ((linksize = readlink(exepath, destpath, destpath_size)) == (ssize_t)destpath_size) {
152 destpath_size = destpath_size * 2;
153 destpath = srealloc(destpath, destpath_size);
156 err(EXIT_FAILURE, "readlink(%s)", exepath);
158 /* readlink() does not NULL-terminate strings, so we have to. */
159 destpath[linksize] = '\0';
161 /* Check if "(deleted)" is the readlink result. If so, the running version
162 * does not match the file on disk. */
163 if (strstr(destpath, "(deleted)") != NULL)
164 printf("RUNNING BINARY DIFFERENT FROM BINARY ON DISK!\n");
166 /* Since readlink() might put a "(deleted)" somewhere in the buffer and
167 * stripping that out seems hackish and ugly, we read the process’s argv[0]
170 sasprintf(&exepath, "/proc/%s/cmdline", pid_from_atom);
173 if ((fd = open(exepath, O_RDONLY)) == -1)
174 err(EXIT_FAILURE, "open(%s)", exepath);
175 if (read(fd, destpath, sizeof(destpath)) == -1)
176 err(EXIT_FAILURE, "read(%s)", exepath);
179 printf("The i3 binary you are running: %s\n", destpath);