src/socket.c

   1 /*
   2  *      socket.c - this file is part of Geany, a fast and lightweight IDE
   3  *
   4  *      Copyright 2006-2012 Enrico Tröger <enrico(dot)troeger(at)uvena(dot)de>
   5  *      Copyright 2006-2012 Nick Treleaven <nick(dot)treleaven(at)btinternet(dot)com>
   6  *      Copyright 2006 Hiroyuki Yamamoto (author of Sylpheed)
   7  *
   8  *      This program is free software; you can redistribute it and/or modify
   9  *      it under the terms of the GNU General Public License as published by
  10  *      the Free Software Foundation; either version 2 of the License, or
  11  *      (at your option) any later version.
  12  *
  13  *      This program is distributed in the hope that it will be useful,
  14  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *      GNU General Public License for more details.
  17  *
  18  *      You should have received a copy of the GNU General Public License along
  19  *      with this program; if not, write to the Free Software Foundation, Inc.,
  20  *      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 /*
  24  * Socket setup and messages handling.
  25  * The socket allows detection and messages to be sent to the first running instance of Geany.
  26  * Only the first instance loads session files at startup, and opens files from the command-line.
  27  */
  28
  29 /*
  30  * Little dev doc:
  31  * Each command which is sent between two instances (see send_open_command and
  32  * socket_lock_input_cb) should have the following scheme:
  33  * command name\n
  34  * data\n
  35  * data\n
  36  * ...
  37  * .\n
  38  * The first thing should be the command name followed by the data belonging to the command and
  39  * to mark the end of data send a single '.'. Each message should be ended with \n.
  40  * The command window is only available on Windows and takes no additional data, instead it
  41  * writes back a Windows handle (HWND) for the main window to set it to the foreground (focus).
  42  *
  43  * At the moment the commands window, doclist, open, openro, line and column are available.
  44  *
  45  * About the socket files on Unix-like systems:
  46  * Geany creates a socket in /tmp (or any other directory returned by g_get_tmp_dir()) and
  47  * a symlink in the current configuration to the created socket file. The symlink is named
  48  * geany_socket_<hostname>_<displayname> (displayname is the name of the active X display).
  49  * If the socket file cannot be created in the temporary directory, Geany creates the socket file
  50  * directly in the configuration directory as a fallback.
  51  *
  52  */
  53
  54 #ifdef HAVE_CONFIG_H
  55 # include "config.h"
  56 #endif
  57
  58 #ifdef HAVE_SOCKET
  59
  60 #include "socket.h"
  61
  62 #include "app.h"
  63 #include "dialogs.h"
  64 #include "document.h"
  65 #include "encodings.h"
  66 #include "main.h"
  67 #include "support.h"
  68 #include "utils.h"
  69 #include "win32.h"
  70
  71 #include "gtkcompat.h"
  72
  73
  74 #ifndef G_OS_WIN32
  75 # include <sys/time.h>
  76 # include <sys/types.h>
  77 # include <sys/socket.h>
  78 # include <sys/un.h>
  79 # include <netinet/in.h>
  80 # include <glib/gstdio.h>
  81 #else
  82 # include "win32defines.h"
  83 # include <winsock2.h>
  84 # include <windows.h>
  85 # include <gdk/gdkwin32.h>
  86 # include <ws2tcpip.h>
  87 #endif
  88 #include <string.h>
  89 #include <stdlib.h>
  90 #include <unistd.h>
  91 #include <fcntl.h>
  92
  93 #ifdef GDK_WINDOWING_X11
  94 #include <gdk/gdkx.h>
  95 #endif
  96
  97
  98 #ifdef G_OS_WIN32
  99 #define REMOTE_CMD_PORT         49876
 100 #define SOCKET_IS_VALID(s)      ((s) != INVALID_SOCKET)
 101 #else
 102 #define SOCKET_IS_VALID(s)      ((s) >= 0)
 103 #define INVALID_SOCKET          (-1)
 104 #endif
 105 #define BUFFER_LENGTH 4096
 106
 107 struct socket_info_struct socket_info;
 108
 109
 110 #ifdef G_OS_WIN32
 111 static gint socket_fd_connect_inet      (gushort port);
 112 static gint socket_fd_open_inet         (gushort port);
 113 static void socket_init_win32           (void);
 114 #else
 115 static gint socket_fd_connect_unix      (const gchar *path);
 116 static gint socket_fd_open_unix         (const gchar *path);
 117 #endif
 118
 119 static gint socket_fd_write                     (gint sock, const gchar *buf, gint len);
 120 static gint socket_fd_write_all         (gint sock, const gchar *buf, gint len);
 121 static gint socket_fd_gets                      (gint sock, gchar *buf, gint len);
 122 static gint socket_fd_check_io          (gint fd, GIOCondition cond);
 123 static gint socket_fd_read                      (gint sock, gchar *buf, gint len);
 124 static gint socket_fd_recv                      (gint fd, gchar *buf, gint len, gint flags);
 125 static gint socket_fd_close                     (gint sock);
 126
 127
 128
 129 static void send_open_command(gint sock, gint argc, gchar **argv)
 130 {
 131         gint i;
 132         gchar *filename;
 133
 134         g_return_if_fail(argc > 1);
 135         geany_debug("using running instance of Geany");
 136
 137         if (cl_options.goto_line >= 0)
 138         {
 139                 gchar *line = g_strdup_printf("%d\n", cl_options.goto_line);
 140                 socket_fd_write_all(sock, "line\n", 5);
 141                 socket_fd_write_all(sock, line, strlen(line));
 142                 socket_fd_write_all(sock, ".\n", 2);
 143                 g_free(line);
 144         }
 145
 146         if (cl_options.goto_column >= 0)
 147         {
 148                 gchar *col = g_strdup_printf("%d\n", cl_options.goto_column);
 149                 socket_fd_write_all(sock, "column\n", 7);
 150                 socket_fd_write_all(sock, col, strlen(col));
 151                 socket_fd_write_all(sock, ".\n", 2);
 152                 g_free(col);
 153         }
 154
 155         if (cl_options.readonly) /* append "ro" to denote readonly status for new docs */
 156                 socket_fd_write_all(sock, "openro\n", 7);
 157         else
 158                 socket_fd_write_all(sock, "open\n", 5);
 159
 160         for (i = 1; i < argc && argv[i] != NULL; i++)
 161         {
 162                 filename = main_get_argv_filename(argv[i]);
 163
 164                 /* if the filename is valid or if a new file should be opened is check on the other side */
 165                 if (filename != NULL)
 166                 {
 167                         socket_fd_write_all(sock, filename, strlen(filename));
 168                         socket_fd_write_all(sock, "\n", 1);
 169                 }
 170                 else
 171                 {
 172                         g_printerr(_("Could not find file '%s'."), filename);
 173                         g_printerr("\n");       /* keep translation from open_cl_files() in main.c. */
 174                 }
 175                 g_free(filename);
 176         }
 177         socket_fd_write_all(sock, ".\n", 2);
 178 }
 179
 180
 181 #ifndef G_OS_WIN32
 182 static void remove_socket_link_full(void)
 183 {
 184         gchar real_path[512];
 185         gsize len;
 186
 187         real_path[0] = '\0';
 188
 189         /* read the contents of the symbolic link socket_info.file_name and delete it
 190          * readlink should return something like "/tmp/geany_socket.499602d2" */
 191         len = readlink(socket_info.file_name, real_path, sizeof(real_path) - 1);
 192         if ((gint) len > 0)
 193         {
 194                 real_path[len] = '\0';
 195                 g_unlink(real_path);
 196         }
 197         g_unlink(socket_info.file_name);
 198 }
 199 #endif
 200
 201
 202 static void socket_get_document_list(gint sock)
 203 {
 204         gchar buf[BUFFER_LENGTH];
 205         gint n_read;
 206
 207         if (sock < 0)
 208                 return;
 209
 210         socket_fd_write_all(sock, "doclist\n", 8);
 211
 212         do
 213         {
 214                 n_read = socket_fd_read(sock, buf, BUFFER_LENGTH);
 215                 /* if we received ETX (end-of-text), there is nothing else to read, so cut that
 216                  * byte not to output it and to be sure not to validate the loop condition */
 217                 if (n_read > 0 && buf[n_read - 1] == '\3')
 218                         n_read--;
 219                 if (n_read > 0)
 220                         fwrite(buf, 1, n_read, stdout);
 221         }
 222         while (n_read >= BUFFER_LENGTH);
 223 }
 224
 225
 226 #ifndef G_OS_WIN32
 227 static void check_socket_permissions(void)
 228 {
 229         struct stat socket_stat;
 230
 231         if (g_lstat(socket_info.file_name, &socket_stat) == 0)
 232         {       /* If the user id of the process is not the same as the owner of the socket
 233                  * file, then ignore this socket and start a new session. */
 234                 if (socket_stat.st_uid != getuid())
 235                 {
 236                         const gchar *msg = _(
 237         /* TODO maybe this message needs a rewording */
 238         "Geany tried to access the Unix Domain socket of another instance running as another user.\n"
 239         "This is a fatal error and Geany will now quit.");
 240                         g_warning("%s", msg);
 241                         dialogs_show_msgbox(GTK_MESSAGE_ERROR, "%s", msg);
 242                         exit(1);
 243                 }
 244         }
 245 }
 246 #endif
 247
 248
 249 /* (Unix domain) socket support to replace the old FIFO code
 250  * (taken from Sylpheed, thanks)
 251  * Returns the created socket, -1 if an error occurred or -2 if another socket exists and files
 252  * were sent to it. */
 253 gint socket_init(gint argc, gchar **argv)
 254 {
 255         gint sock;
 256 #ifdef G_OS_WIN32
 257         HANDLE hmutex;
 258         HWND hwnd;
 259         socket_init_win32();
 260         hmutex = CreateMutexA(NULL, FALSE, "Geany");
 261         if (! hmutex)
 262         {
 263                 geany_debug("cannot create Mutex\n");
 264                 return -1;
 265         }
 266         if (GetLastError() != ERROR_ALREADY_EXISTS)
 267         {
 268                 /* To support multiple instances with different configuration directories (as we do on
 269                  * non-Windows systems) we would need to use different port number s but it might be
 270                  * difficult to get a port number which is unique for a configuration directory (path)
 271                  * and which is unused. This port number has to be guessed by the first and new instance
 272                  * and the only data is the configuration directory path.
 273                  * For now we use one port number, that is we support only one instance at all. */
 274                 sock = socket_fd_open_inet(REMOTE_CMD_PORT);
 275                 if (sock < 0)
 276                         return 0;
 277                 return sock;
 278         }
 279
 280         sock = socket_fd_connect_inet(REMOTE_CMD_PORT);
 281         if (sock < 0)
 282                 return -1;
 283 #else
 284         gchar *display_name = NULL;
 285         const gchar *hostname = g_get_host_name();
 286         GdkDisplay *display = gdk_display_get_default();
 287         gchar *p;
 288
 289         if (display != NULL)
 290                 display_name = g_strdup(gdk_display_get_name(display));
 291         if (display_name == NULL)
 292                 display_name = g_strdup("NODISPLAY");
 293
 294         /* these lines are taken from dcopc.c in kdelibs */
 295         if ((p = strrchr(display_name, '.')) > strrchr(display_name, ':') && p != NULL)
 296                 *p = '\0';
 297         /* remove characters that may not be acceptable in a filename */
 298         for (p = display_name; *p; p++)
 299         {
 300                 if (*p == ':' || *p == '/')
 301                         *p = '_';
 302         }
 303
 304         if (socket_info.file_name == NULL)
 305                 socket_info.file_name = g_strdup_printf("%s%cgeany_socket_%s_%s",
 306                         app->configdir, G_DIR_SEPARATOR, hostname, display_name);
 307
 308         g_free(display_name);
 309
 310         /* check whether the real user id is the same as this of the socket file */
 311         check_socket_permissions();
 312
 313         sock = socket_fd_connect_unix(socket_info.file_name);
 314         if (sock < 0)
 315         {
 316                 remove_socket_link_full(); /* deletes the socket file and the symlink */
 317                 return socket_fd_open_unix(socket_info.file_name);
 318         }
 319 #endif
 320
 321         /* remote command mode, here we have another running instance and want to use it */
 322
 323 #ifdef G_OS_WIN32
 324         /* first we send a request to retrieve the window handle and focus the window */
 325         socket_fd_write_all(sock, "window\n", 7);
 326         if (socket_fd_read(sock, (gchar *)&hwnd, sizeof(hwnd)) == sizeof(hwnd))
 327                 SetForegroundWindow(hwnd);
 328 #endif
 329         /* now we send the command line args */
 330         if (argc > 1)
 331         {
 332                 send_open_command(sock, argc, argv);
 333         }
 334
 335         if (cl_options.list_documents)
 336         {
 337                 socket_get_document_list(sock);
 338         }
 339
 340         socket_fd_close(sock);
 341         return -2;
 342 }
 343
 344
 345 gint socket_finalize(void)
 346 {
 347         if (socket_info.lock_socket < 0)
 348                 return -1;
 349
 350         if (socket_info.lock_socket_tag > 0)
 351                 g_source_remove(socket_info.lock_socket_tag);
 352         if (socket_info.read_ioc)
 353         {
 354                 g_io_channel_shutdown(socket_info.read_ioc, FALSE, NULL);
 355                 g_io_channel_unref(socket_info.read_ioc);
 356                 socket_info.read_ioc = NULL;
 357         }
 358
 359 #ifdef G_OS_WIN32
 360         WSACleanup();
 361 #else
 362         if (socket_info.file_name != NULL)
 363         {
 364                 remove_socket_link_full(); /* deletes the socket file and the symlink */
 365                 g_free(socket_info.file_name);
 366         }
 367 #endif
 368
 369         return 0;
 370 }
 371
 372
 373 #ifdef G_OS_UNIX
 374 static gint socket_fd_connect_unix(const gchar *path)
 375 {
 376         gint sock;
 377         struct sockaddr_un addr;
 378
 379         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 380         if (sock < 0)
 381         {
 382                 perror("fd_connect_unix(): socket");
 383                 return -1;
 384         }
 385
 386         memset(&addr, 0, sizeof(addr));
 387         addr.sun_family = AF_UNIX;
 388         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 389
 390         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 391         {
 392                 socket_fd_close(sock);
 393                 return -1;
 394         }
 395
 396         return sock;
 397 }
 398
 399
 400 static gint socket_fd_open_unix(const gchar *path)
 401 {
 402         gint sock;
 403         struct sockaddr_un addr;
 404         gint val;
 405         gchar *real_path;
 406
 407         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 408
 409         if (sock < 0)
 410         {
 411                 perror("sock_open_unix(): socket");
 412                 return -1;
 413         }
 414
 415         val = 1;
 416         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0)
 417         {
 418                 perror("setsockopt");
 419                 socket_fd_close(sock);
 420                 return -1;
 421         }
 422
 423         /* fix for #1888561:
 424          * in case the configuration directory is located on a network file system or any other
 425          * file system which doesn't support sockets, we just link the socket there and create the
 426          * real socket in the system's tmp directory assuming it supports sockets */
 427         real_path = g_strdup_printf("%s%cgeany_socket.%08x",
 428                 g_get_tmp_dir(), G_DIR_SEPARATOR, g_random_int());
 429
 430         if (utils_is_file_writable(real_path) != 0)
 431         {       /* if real_path is not writable for us, fall back to ~/.config/geany/geany_socket_*_* */
 432                 /* instead of creating a symlink and print a warning */
 433                 g_warning("Socket %s could not be written, using %s as fallback.", real_path, path);
 434                 SETPTR(real_path, g_strdup(path));
 435         }
 436         /* create a symlink in e.g. ~/.config/geany/geany_socket_hostname__0 to /tmp/geany_socket.499602d2 */
 437         else if (symlink(real_path, path) != 0)
 438         {
 439                 perror("symlink");
 440                 socket_fd_close(sock);
 441                 return -1;
 442         }
 443
 444         memset(&addr, 0, sizeof(addr));
 445         addr.sun_family = AF_UNIX;
 446         strncpy(addr.sun_path, real_path, sizeof(addr.sun_path) - 1);
 447
 448         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 449         {
 450                 perror("bind");
 451                 socket_fd_close(sock);
 452                 return -1;
 453         }
 454
 455         if (listen(sock, 1) < 0)
 456         {
 457                 perror("listen");
 458                 socket_fd_close(sock);
 459                 return -1;
 460         }
 461
 462         g_chmod(real_path, 0600);
 463
 464         g_free(real_path);
 465
 466         return sock;
 467 }
 468 #endif
 469
 470 static gint socket_fd_close(gint fd)
 471 {
 472 #ifdef G_OS_WIN32
 473         return closesocket(fd);
 474 #else
 475         return close(fd);
 476 #endif
 477 }
 478
 479
 480 #ifdef G_OS_WIN32
 481 static gint socket_fd_open_inet(gushort port)
 482 {
 483         SOCKET sock;
 484         struct sockaddr_in addr;
 485         gchar val;
 486
 487         sock = socket(AF_INET, SOCK_STREAM, 0);
 488         if (G_UNLIKELY(! SOCKET_IS_VALID(sock)))
 489         {
 490                 geany_debug("fd_open_inet(): socket() failed: %d\n", WSAGetLastError());
 491                 return -1;
 492         }
 493
 494         val = 1;
 495         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0)
 496         {
 497                 perror("setsockopt");
 498                 socket_fd_close(sock);
 499                 return -1;
 500         }
 501
 502         memset(&addr, 0, sizeof(addr));
 503         addr.sin_family = AF_INET;
 504         addr.sin_port = htons(port);
 505         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 506
 507         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 508         {
 509                 perror("bind");
 510                 socket_fd_close(sock);
 511                 return -1;
 512         }
 513
 514         if (listen(sock, 1) < 0)
 515         {
 516                 perror("listen");
 517                 socket_fd_close(sock);
 518                 return -1;
 519         }
 520
 521         return sock;
 522 }
 523
 524
 525 static gint socket_fd_connect_inet(gushort port)
 526 {
 527         SOCKET sock;
 528         struct sockaddr_in addr;
 529
 530         sock = socket(AF_INET, SOCK_STREAM, 0);
 531         if (G_UNLIKELY(! SOCKET_IS_VALID(sock)))
 532         {
 533                 geany_debug("fd_connect_inet(): socket() failed: %d\n", WSAGetLastError());
 534                 return -1;
 535         }
 536
 537         memset(&addr, 0, sizeof(addr));
 538         addr.sin_family = AF_INET;
 539         addr.sin_port = htons(port);
 540         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 541
 542         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 543         {
 544                 socket_fd_close(sock);
 545                 return -1;
 546         }
 547
 548         return sock;
 549 }
 550
 551
 552 static void socket_init_win32(void)
 553 {
 554         WSADATA wsadata;
 555
 556         if (WSAStartup(MAKEWORD(2, 2), &wsadata) != NO_ERROR)
 557                 geany_debug("WSAStartup() failed\n");
 558
 559         return;
 560 }
 561 #endif
 562
 563
 564 static void handle_input_filename(const gchar *buf)
 565 {
 566         gchar *utf8_filename, *locale_filename;
 567
 568         /* we never know how the input is encoded, so do the best auto detection we can */
 569         if (! g_utf8_validate(buf, -1, NULL))
 570                 utf8_filename = encodings_convert_to_utf8(buf, -1, NULL);
 571         else
 572                 utf8_filename = g_strdup(buf);
 573
 574         locale_filename = utils_get_locale_from_utf8(utf8_filename);
 575         if (locale_filename)
 576         {
 577                 if (g_str_has_suffix(locale_filename, ".geany"))
 578                 {
 579                         if (project_ask_close())
 580                                 main_load_project_from_command_line(locale_filename, TRUE);
 581                 }
 582                 else
 583                         main_handle_filename(locale_filename);
 584         }
 585         g_free(utf8_filename);
 586         g_free(locale_filename);
 587 }
 588
 589
 590 static gchar *build_document_list(void)
 591 {
 592         GString *doc_list = g_string_new(NULL);
 593         guint i;
 594         const gchar *filename;
 595
 596         foreach_document(i)
 597         {
 598                 filename = DOC_FILENAME(documents[i]);
 599                 g_string_append(doc_list, filename);
 600                 g_string_append_c(doc_list, '\n');
 601         }
 602         return g_string_free(doc_list, FALSE);
 603 }
 604
 605
 606 gboolean socket_lock_input_cb(GIOChannel *source, GIOCondition condition, gpointer data)
 607 {
 608         gint fd, sock;
 609         gchar buf[BUFFER_LENGTH];
 610         struct sockaddr_in caddr;
 611         socklen_t caddr_len = sizeof(caddr);
 612         GtkWidget *window = data;
 613         gboolean popup = FALSE;
 614
 615         fd = g_io_channel_unix_get_fd(source);
 616         sock = accept(fd, (struct sockaddr *)&caddr, &caddr_len);
 617
 618         /* first get the command */
 619         while (socket_fd_gets(sock, buf, sizeof(buf)) != -1)
 620         {
 621                 if (strncmp(buf, "open", 4) == 0)
 622                 {
 623                         cl_options.readonly = strncmp(buf+4, "ro", 2) == 0; /* open in readonly? */
 624                         while (socket_fd_gets(sock, buf, sizeof(buf)) != -1 && *buf != '.')
 625                         {
 626                                 gsize buf_len = strlen(buf);
 627
 628                                 /* remove trailing newline */
 629                                 if (buf_len > 0 && buf[buf_len - 1] == '\n')
 630                                         buf[buf_len - 1] = '\0';
 631
 632                                 handle_input_filename(buf);
 633                         }
 634                         popup = TRUE;
 635                 }
 636                 else if (strncmp(buf, "doclist", 7) == 0)
 637                 {
 638                         gchar *doc_list = build_document_list();
 639                         if (!EMPTY(doc_list))
 640                                 socket_fd_write_all(sock, doc_list, strlen(doc_list));
 641                         /* send ETX (end-of-text) so reader knows to stop reading */
 642                         socket_fd_write_all(sock, "\3", 1);
 643                         g_free(doc_list);
 644                 }
 645                 else if (strncmp(buf, "line", 4) == 0)
 646                 {
 647                         while (socket_fd_gets(sock, buf, sizeof(buf)) != -1 && *buf != '.')
 648                         {
 649                                 g_strstrip(buf); /* remove \n char */
 650                                 /* on any error we get 0 which should be safe enough as fallback */
 651                                 cl_options.goto_line = atoi(buf);
 652                         }
 653                 }
 654                 else if (strncmp(buf, "column", 6) == 0)
 655                 {
 656                         while (socket_fd_gets(sock, buf, sizeof(buf)) != -1 && *buf != '.')
 657                         {
 658                                 g_strstrip(buf); /* remove \n char */
 659                                 /* on any error we get 0 which should be safe enough as fallback */
 660                                 cl_options.goto_column = atoi(buf);
 661                         }
 662                 }
 663 #ifdef G_OS_WIN32
 664                 else if (strncmp(buf, "window", 6) == 0)
 665                 {
 666 #       if GTK_CHECK_VERSION(3, 0, 0)
 667                         HWND hwnd = (HWND) gdk_win32_window_get_handle(gtk_widget_get_window(window));
 668 #       else
 669                         HWND hwnd = (HWND) gdk_win32_drawable_get_handle(
 670                                 GDK_DRAWABLE(gtk_widget_get_window(window)));
 671 #       endif
 672                         socket_fd_write(sock, (gchar *)&hwnd, sizeof(hwnd));
 673                 }
 674 #endif
 675         }
 676
 677         if (popup)
 678         {
 679 #ifdef GDK_WINDOWING_X11
 680                 GdkWindow *x11_window = gtk_widget_get_window(window);
 681
 682                 /* Set the proper interaction time on the window. This seems necessary to make
 683                  * gtk_window_present() really bring the main window into the foreground on some
 684                  * window managers like Gnome's metacity.
 685                  * Code taken from Gedit. */
 686 #       if GTK_CHECK_VERSION(3, 0, 0)
 687                 if (GDK_IS_X11_WINDOW(x11_window))
 688 #       endif
 689                 {
 690                         gdk_x11_window_set_user_time(x11_window, gdk_x11_get_server_time(x11_window));
 691                 }
 692 #endif
 693                 gtk_window_present(GTK_WINDOW(window));
 694 #ifdef G_OS_WIN32
 695                 gdk_window_show(gtk_widget_get_window(window));
 696 #endif
 697         }
 698
 699         socket_fd_close(sock);
 700
 701         return TRUE;
 702 }
 703
 704
 705 static gint socket_fd_gets(gint fd, gchar *buf, gint len)
 706 {
 707         gchar *newline, *bp = buf;
 708         gint n;
 709
 710         if (--len < 1)
 711                 return -1;
 712         do
 713         {
 714                 if ((n = socket_fd_recv(fd, bp, len, MSG_PEEK)) <= 0)
 715                         return -1;
 716                 if ((newline = memchr(bp, '\n', n)) != NULL)
 717                         n = newline - bp + 1;
 718                 if ((n = socket_fd_read(fd, bp, n)) < 0)
 719                         return -1;
 720                 bp += n;
 721                 len -= n;
 722         } while (! newline && len);
 723
 724         *bp = '\0';
 725         return bp - buf;
 726 }
 727
 728
 729 static gint socket_fd_recv(gint fd, gchar *buf, gint len, gint flags)
 730 {
 731         if (socket_fd_check_io(fd, G_IO_IN) < 0)
 732                 return -1;
 733
 734         return recv(fd, buf, len, flags);
 735 }
 736
 737
 738 static gint socket_fd_read(gint fd, gchar *buf, gint len)
 739 {
 740         if (socket_fd_check_io(fd, G_IO_IN) < 0)
 741                 return -1;
 742
 743 #ifdef G_OS_WIN32
 744         return recv(fd, buf, len, 0);
 745 #else
 746         return read(fd, buf, len);
 747 #endif
 748 }
 749
 750
 751 static gint socket_fd_check_io(gint fd, GIOCondition cond)
 752 {
 753         struct timeval timeout;
 754         fd_set fds;
 755 #ifdef G_OS_UNIX
 756         gint flags;
 757 #endif
 758
 759         timeout.tv_sec  = 60;
 760         timeout.tv_usec = 0;
 761
 762 #ifdef G_OS_UNIX
 763         /* checking for non-blocking mode */
 764         flags = fcntl(fd, F_GETFL, 0);
 765         if (flags < 0)
 766         {
 767                 perror("fcntl");
 768                 return 0;
 769         }
 770         if ((flags & O_NONBLOCK) != 0)
 771                 return 0;
 772 #endif
 773
 774         FD_ZERO(&fds);
 775 #ifdef G_OS_WIN32
 776         FD_SET((SOCKET)fd, &fds);
 777 #else
 778         FD_SET(fd, &fds);
 779 #endif
 780
 781         if (cond == G_IO_IN)
 782         {
 783                 select(fd + 1, &fds, NULL, NULL, &timeout);
 784         }
 785         else
 786         {
 787                 select(fd + 1, NULL, &fds, NULL, &timeout);
 788         }
 789
 790         if (FD_ISSET(fd, &fds))
 791         {
 792                 return 0;
 793         }
 794         else
 795         {
 796                 geany_debug("Socket IO timeout");
 797                 return -1;
 798         }
 799 }
 800
 801
 802 static gint socket_fd_write_all(gint fd, const gchar *buf, gint len)
 803 {
 804         gint n, wrlen = 0;
 805
 806         while (len)
 807         {
 808                 n = socket_fd_write(fd, buf, len);
 809                 if (n <= 0)
 810                         return -1;
 811                 len -= n;
 812                 wrlen += n;
 813                 buf += n;
 814         }
 815
 816         return wrlen;
 817 }
 818
 819
 820 gint socket_fd_write(gint fd, const gchar *buf, gint len)
 821 {
 822         if (socket_fd_check_io(fd, G_IO_OUT) < 0)
 823                 return -1;
 824
 825 #ifdef G_OS_WIN32
 826         return send(fd, buf, len, 0);
 827 #else
 828         return write(fd, buf, len);
 829 #endif
 830 }
 831
 832
 833 #endif