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