gio/gsettings-tool.c

   1 /*
   2  * Copyright © 2010 Codethink Limited
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the licence, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 #include "config.h"
  23
  24 #include <gio/gio.h>
  25 #include <gi18n.h>
  26 #include <locale.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29
  30 static gboolean
  31 contained (const gchar * const *items,
  32            const gchar         *item)
  33 {
  34   while (*items)
  35     if (strcmp (*items++, item) == 0)
  36       return TRUE;
  37
  38   return FALSE;
  39 }
  40
  41 static gboolean
  42 is_schema (const gchar *schema)
  43 {
  44   return contained (g_settings_list_schemas (), schema);
  45 }
  46
  47 static gboolean
  48 is_relocatable_schema (const gchar *schema)
  49 {
  50   return contained (g_settings_list_relocatable_schemas (), schema);
  51 }
  52
  53 static gboolean
  54 check_relocatable_schema (const gchar *schema)
  55 {
  56   if (is_relocatable_schema (schema))
  57     return TRUE;
  58
  59   if (is_schema (schema))
  60     g_printerr (_("Schema '%s' is not relocatable "
  61                   "(path must not be specified)\n"),
  62                 schema);
  63
  64   else
  65     g_printerr (_("No such schema '%s'\n"), schema);
  66
  67   return FALSE;
  68 }
  69
  70 static gboolean
  71 check_schema (const gchar *schema)
  72 {
  73   if (is_schema (schema))
  74     return TRUE;
  75
  76   if (is_relocatable_schema (schema))
  77     g_printerr (_("Schema '%s' is relocatable "
  78                   "(path must be specified)\n"),
  79                 schema);
  80
  81   else
  82     g_printerr (_("No such schema '%s'\n"), schema);
  83
  84   return FALSE;
  85 }
  86
  87 static gboolean
  88 check_path (const gchar *path)
  89 {
  90   if (path[0] == '\0')
  91     {
  92       g_printerr (_("Empty path given.\n"));
  93       return FALSE;
  94     }
  95
  96   if (path[0] != '/')
  97     {
  98       g_printerr (_("Path must begin with a slash (/)\n"));
  99       return FALSE;
 100     }
 101
 102   if (!g_str_has_suffix (path, "/"))
 103     {
 104       g_printerr (_("Path must end with a slash (/)\n"));
 105       return FALSE;
 106     }
 107
 108   if (strstr (path, "//"))
 109     {
 110       g_printerr (_("Path must not contain two adjacent slashes (//)\n"));
 111       return FALSE;
 112     }
 113
 114   return TRUE;
 115 }
 116
 117 static gboolean
 118 check_key (GSettings   *settings,
 119            const gchar *key)
 120 {
 121   gboolean good;
 122   gchar **keys;
 123
 124   keys = g_settings_list_keys (settings);
 125   good = contained ((const gchar **) keys, key);
 126   g_strfreev (keys);
 127
 128   if (good)
 129     return TRUE;
 130
 131   g_printerr (_("No such key '%s'\n"), key);
 132
 133   return FALSE;
 134 }
 135
 136 static void
 137 output_list (const gchar * const *list)
 138 {
 139   gint i;
 140
 141   for (i = 0; list[i]; i++)
 142     g_print ("%s\n", list[i]);
 143 }
 144
 145 static void
 146 gsettings_list_schemas (GSettings   *settings,
 147                         const gchar *key,
 148                         const gchar *value)
 149 {
 150   output_list (g_settings_list_schemas ());
 151 }
 152
 153 static void
 154 gsettings_list_relocatable_schemas (GSettings   *settings,
 155                                     const gchar *key,
 156                                     const gchar *value)
 157 {
 158   output_list (g_settings_list_relocatable_schemas ());
 159 }
 160
 161 static void
 162 gsettings_list_keys (GSettings   *settings,
 163                      const gchar *key,
 164                      const gchar *value)
 165 {
 166   gchar **keys;
 167
 168   keys = g_settings_list_keys (settings);
 169   output_list ((const gchar **) keys);
 170   g_strfreev (keys);
 171 }
 172
 173 static void
 174 gsettings_list_children (GSettings   *settings,
 175                          const gchar *key,
 176                          const gchar *value)
 177 {
 178   gchar **children;
 179   gint max = 0;
 180   gint i;
 181
 182   children = g_settings_list_children (settings);
 183   for (i = 0; children[i]; i++)
 184     if (strlen (children[i]) > max)
 185       max = strlen (children[i]);
 186
 187   for (i = 0; children[i]; i++)
 188     {
 189       GSettings *child;
 190       gchar *schema;
 191       gchar *path;
 192
 193       child = g_settings_get_child (settings, children[i]);
 194       g_object_get (child,
 195                     "schema", &schema,
 196                     "path", &path,
 197                     NULL);
 198
 199       if (is_schema (schema))
 200         g_print ("%-*s   %s\n", max, children[i], schema);
 201       else
 202         g_print ("%-*s   %s:%s\n", max, children[i], schema, path);
 203
 204       g_object_unref (child);
 205       g_free (schema);
 206       g_free (path);
 207     }
 208
 209   g_strfreev (children);
 210 }
 211
 212 static void
 213 enumerate (GSettings *settings)
 214 {
 215   gchar **keys;
 216   gchar *schema;
 217   gint i;
 218
 219   g_object_get (settings, "schema", &schema, NULL);
 220
 221   keys = g_settings_list_keys (settings);
 222   for (i = 0; keys[i]; i++)
 223     {
 224       GVariant *value;
 225       gchar *printed;
 226
 227       value = g_settings_get_value (settings, keys[i]);
 228       printed = g_variant_print (value, TRUE);
 229       g_print ("%s %s %s\n", schema, keys[i], printed);
 230       g_variant_unref (value);
 231       g_free (printed);
 232     }
 233
 234   g_free (schema);
 235   g_strfreev (keys);
 236 }
 237
 238 static void
 239 gsettings_list_recursively (GSettings   *settings,
 240                             const gchar *key,
 241                             const gchar *value)
 242 {
 243   if (settings)
 244     {
 245       gchar **children;
 246       gint i;
 247
 248       enumerate (settings);
 249       children = g_settings_list_children (settings);
 250       for (i = 0; children[i]; i++)
 251         {
 252           GSettings *child;
 253           gchar *schema;
 254
 255           child = g_settings_get_child (settings, children[i]);
 256           g_object_get (child, "schema", &schema, NULL);
 257
 258           if (is_schema (schema))
 259             enumerate (child);
 260
 261           g_object_unref (child);
 262           g_free (schema);
 263         }
 264
 265       g_strfreev (children);
 266     }
 267   else
 268     {
 269       const gchar * const *schemas;
 270       gint i;
 271
 272       schemas = g_settings_list_schemas ();
 273
 274       for (i = 0; schemas[i]; i++)
 275         {
 276           settings = g_settings_new (schemas[i]);
 277           enumerate (settings);
 278           g_object_unref (settings);
 279         }
 280     }
 281 }
 282
 283 static void
 284 gsettings_range (GSettings   *settings,
 285                  const gchar *key,
 286                  const gchar *value)
 287 {
 288   GVariant *range, *detail;
 289   const gchar *type;
 290
 291   range = g_settings_get_range (settings, key);
 292   g_variant_get (range, "(&sv)", &type, &detail);
 293
 294   if (strcmp (type, "type") == 0)
 295     g_print ("type %s\n", g_variant_get_type_string (detail) + 1);
 296
 297   else if (strcmp (type, "range") == 0)
 298     {
 299       GVariant *min, *max;
 300       gchar *smin, *smax;
 301
 302       g_variant_get (detail, "(**)", &min, &max);
 303       smin = g_variant_print (min, FALSE);
 304       smax = g_variant_print (max, FALSE);
 305
 306       g_print ("range %s %s %s\n",
 307                g_variant_get_type_string (min), smin, smax);
 308       g_variant_unref (min);
 309       g_variant_unref (max);
 310       g_free (smin);
 311       g_free (smax);
 312     }
 313
 314   else if (strcmp (type, "enum") == 0 || strcmp (type, "flags") == 0)
 315     {
 316       GVariantIter iter;
 317       GVariant *item;
 318
 319       g_print ("%s\n", type);
 320
 321       g_variant_iter_init (&iter, detail);
 322       while (g_variant_iter_loop (&iter, "*", &item))
 323         {
 324           gchar *printed;
 325
 326           printed = g_variant_print (item, FALSE);
 327           g_print ("%s\n", printed);
 328           g_free (printed);
 329         }
 330     }
 331
 332   g_variant_unref (detail);
 333   g_variant_unref (range);
 334 }
 335
 336 static void
 337 gsettings_get (GSettings   *settings,
 338                const gchar *key,
 339                const gchar *value_)
 340 {
 341   GVariant *value;
 342   gchar *printed;
 343
 344   value = g_settings_get_value (settings, key);
 345   printed = g_variant_print (value, TRUE);
 346   g_print ("%s\n", printed);
 347   g_variant_unref (value);
 348   g_free (printed);
 349 }
 350
 351 static void
 352 gsettings_reset (GSettings   *settings,
 353                  const gchar *key,
 354                  const gchar *value)
 355 {
 356   g_settings_reset (settings, key);
 357   g_settings_sync ();
 358 }
 359
 360 static void
 361 reset_all_keys (GSettings   *settings)
 362 {
 363   gchar **keys;
 364   gint i;
 365
 366   keys = g_settings_list_keys (settings);
 367   for (i = 0; keys[i]; i++)
 368     {
 369       g_settings_reset (settings, keys[i]);
 370     }
 371
 372   g_strfreev (keys);
 373 }
 374
 375 static void
 376 gsettings_reset_recursively (GSettings   *settings,
 377                              const gchar *key,
 378                              const gchar *value)
 379 {
 380   gchar **children;
 381   gint i;
 382
 383   g_settings_delay (settings);
 384
 385   reset_all_keys (settings);
 386   children = g_settings_list_children (settings);
 387   for (i = 0; children[i]; i++)
 388     {
 389       GSettings *child;
 390       gchar *schema;
 391
 392       child = g_settings_get_child (settings, children[i]);
 393       g_object_get (child, "schema", &schema, NULL);
 394
 395       if (is_schema (schema))
 396         reset_all_keys (child);
 397
 398       g_object_unref (child);
 399       g_free (schema);
 400     }
 401
 402   g_strfreev (children);
 403
 404   g_settings_apply (settings);
 405   g_settings_sync ();
 406 }
 407
 408 static void
 409 gsettings_writable (GSettings   *settings,
 410                     const gchar *key,
 411                     const gchar *value)
 412 {
 413   g_print ("%s\n",
 414            g_settings_is_writable (settings, key) ?
 415            "true" : "false");
 416 }
 417
 418 static void
 419 value_changed (GSettings   *settings,
 420                const gchar *key,
 421                gpointer     user_data)
 422 {
 423   GVariant *value;
 424   gchar *printed;
 425
 426   value = g_settings_get_value (settings, key);
 427   printed = g_variant_print (value, TRUE);
 428   g_print ("%s: %s\n", key, printed);
 429   g_variant_unref (value);
 430   g_free (printed);
 431 }
 432
 433 static void
 434 gsettings_monitor (GSettings   *settings,
 435                    const gchar *key,
 436                    const gchar *value)
 437 {
 438   if (key)
 439     {
 440       gchar *name;
 441
 442       name = g_strdup_printf ("changed::%s", key);
 443       g_signal_connect (settings, name, G_CALLBACK (value_changed), NULL);
 444     }
 445   else
 446     g_signal_connect (settings, "changed", G_CALLBACK (value_changed), NULL);
 447
 448   g_main_loop_run (g_main_loop_new (NULL, FALSE));
 449 }
 450
 451 static void
 452 gsettings_set (GSettings   *settings,
 453                const gchar *key,
 454                const gchar *value)
 455 {
 456   const GVariantType *type;
 457   GError *error = NULL;
 458   GVariant *existing;
 459   GVariant *new;
 460   gchar *freeme = NULL;
 461
 462   existing = g_settings_get_value (settings, key);
 463   type = g_variant_get_type (existing);
 464
 465   new = g_variant_parse (type, value, NULL, NULL, &error);
 466
 467   /* If that didn't work and the type is string then we should assume
 468    * that the user is just trying to set a string directly and forgot
 469    * the quotes (or had them consumed by the shell).
 470    *
 471    * If the user started with a quote then we assume that some deeper
 472    * problem is at play and we want the failure in that case.
 473    *
 474    * Consider:
 475    *
 476    *   gsettings set x.y.z key "'i don't expect this to work'"
 477    *
 478    * Note that we should not just add quotes and try parsing again, but
 479    * rather assume that the user is providing us with a bare string.
 480    * Assume we added single quotes, then consider this case:
 481    *
 482    *   gsettings set x.y.z key "i'd expect this to work"
 483    *
 484    * A similar example could be given for double quotes.
 485    *
 486    * Avoid that whole mess by just using g_variant_new_string().
 487    */
 488   if (new == NULL &&
 489       g_variant_type_equal (type, G_VARIANT_TYPE_STRING) &&
 490       value[0] != '\'' && value[0] != '"')
 491     {
 492       g_clear_error (&error);
 493       new = g_variant_new_string (value);
 494     }
 495
 496   if (new == NULL)
 497     {
 498       g_printerr ("%s\n", error->message);
 499       exit (1);
 500     }
 501
 502   if (!g_settings_range_check (settings, key, new))
 503     {
 504       g_printerr (_("The provided value is outside of the valid range\n"));
 505       g_variant_unref (new);
 506       exit (1);
 507     }
 508
 509   g_settings_set_value (settings, key, new);
 510   g_variant_unref (existing);
 511   g_variant_unref (new);
 512
 513   g_settings_sync ();
 514
 515   g_free (freeme);
 516 }
 517
 518 static int
 519 gsettings_help (gboolean     requested,
 520                 const gchar *command)
 521 {
 522   const gchar *description;
 523   const gchar *synopsis;
 524   GString *string;
 525
 526   string = g_string_new (NULL);
 527
 528   if (command == NULL)
 529     ;
 530
 531   else if (strcmp (command, "help") == 0)
 532     {
 533       description = _("Print help");
 534       synopsis = "[COMMAND]";
 535     }
 536
 537   else if (strcmp (command, "list-schemas") == 0)
 538     {
 539       description = _("List the installed (non-relocatable) schemas");
 540       synopsis = "";
 541     }
 542
 543   else if (strcmp (command, "list-relocatable-schemas") == 0)
 544     {
 545       description = _("List the installed relocatable schemas");
 546       synopsis = "";
 547     }
 548
 549   else if (strcmp (command, "list-keys") == 0)
 550     {
 551       description = _("List the keys in SCHEMA");
 552       synopsis = N_("SCHEMA[:PATH]");
 553     }
 554
 555   else if (strcmp (command, "list-children") == 0)
 556     {
 557       description = _("List the children of SCHEMA");
 558       synopsis = N_("SCHEMA[:PATH]");
 559     }
 560
 561   else if (strcmp (command, "list-recursively") == 0)
 562     {
 563       description = _("List keys and values, recursively\n"
 564                       "If no SCHEMA is given, list all keys\n");
 565       synopsis = N_("[SCHEMA[:PATH]]");
 566     }
 567
 568   else if (strcmp (command, "get") == 0)
 569     {
 570       description = _("Get the value of KEY");
 571       synopsis = N_("SCHEMA[:PATH] KEY");
 572     }
 573
 574   else if (strcmp (command, "range") == 0)
 575     {
 576       description = _("Query the range of valid values for KEY");
 577       synopsis = N_("SCHEMA[:PATH] KEY");
 578     }
 579
 580   else if (strcmp (command, "set") == 0)
 581     {
 582       description = _("Set the value of KEY to VALUE");
 583       synopsis = N_("SCHEMA[:PATH] KEY VALUE");
 584     }
 585
 586   else if (strcmp (command, "reset") == 0)
 587     {
 588       description = _("Reset KEY to its default value");
 589       synopsis = N_("SCHEMA[:PATH] KEY");
 590     }
 591
 592   else if (strcmp (command, "reset-recursively") == 0)
 593     {
 594       description = _("Reset all keys in SCHEMA to their defaults");
 595       synopsis = N_("SCHEMA[:PATH]");
 596     }
 597
 598   else if (strcmp (command, "writable") == 0)
 599     {
 600       description = _("Check if KEY is writable");
 601       synopsis = N_("SCHEMA[:PATH] KEY");
 602     }
 603
 604   else if (strcmp (command, "monitor") == 0)
 605     {
 606       description = _("Monitor KEY for changes.\n"
 607                     "If no KEY is specified, monitor all keys in SCHEMA.\n"
 608                     "Use ^C to stop monitoring.\n");
 609       synopsis = N_("SCHEMA[:PATH] [KEY]");
 610     }
 611   else
 612     {
 613       g_string_printf (string, _("Unknown command %s\n\n"), command);
 614       requested = FALSE;
 615       command = NULL;
 616     }
 617
 618   if (command == NULL)
 619     {
 620       g_string_append (string,
 621       _("Usage:\n"
 622         "  gsettings COMMAND [ARGS...]\n"
 623         "\n"
 624         "Commands:\n"
 625         "  help                      Show this information\n"
 626         "  list-schemas              List installed schemas\n"
 627         "  list-relocatable-schemas  List relocatable schemas\n"
 628         "  list-keys                 List keys in a schema\n"
 629         "  list-children             List children of a schema\n"
 630         "  list-recursively          List keys and values, recursively\n"
 631         "  range                     Queries the range of a key\n"
 632         "  get                       Get the value of a key\n"
 633         "  set                       Set the value of a key\n"
 634         "  reset                     Reset the value of a key\n"
 635         "  reset-recursively         Reset all values in a given schema\n"
 636         "  writable                  Check if a key is writable\n"
 637         "  monitor                   Watch for changes\n"
 638         "\n"
 639         "Use 'gsettings help COMMAND' to get detailed help.\n\n"));
 640     }
 641   else
 642     {
 643       g_string_append_printf (string, _("Usage:\n  gsettings %s %s\n\n%s\n\n"),
 644                               command, synopsis[0] ? _(synopsis) : "", description);
 645
 646       if (synopsis[0])
 647         {
 648           g_string_append (string, _("Arguments:\n"));
 649
 650           if (strstr (synopsis, "[COMMAND]"))
 651             g_string_append (string,
 652                            _("  COMMAND   The (optional) command to explain\n"));
 653
 654           else if (strstr (synopsis, "SCHEMA"))
 655             g_string_append (string,
 656                            _("  SCHEMA    The name of the schema\n"
 657                              "  PATH      The path, for relocatable schemas\n"));
 658
 659           if (strstr (synopsis, "[KEY]"))
 660             g_string_append (string,
 661                            _("  KEY       The (optional) key within the schema\n"));
 662
 663           else if (strstr (synopsis, "KEY"))
 664             g_string_append (string,
 665                            _("  KEY       The key within the schema\n"));
 666
 667           if (strstr (synopsis, "VALUE"))
 668             g_string_append (string,
 669                            _("  VALUE     The value to set\n"));
 670
 671           g_string_append (string, "\n");
 672         }
 673     }
 674
 675   if (requested)
 676     g_print ("%s", string->str);
 677   else
 678     g_printerr ("%s\n", string->str);
 679
 680   g_string_free (string, TRUE);
 681
 682   return requested ? 0 : 1;
 683 }
 684
 685
 686 int
 687 main (int argc, char **argv)
 688 {
 689   void (* function) (GSettings *, const gchar *, const gchar *);
 690   GSettings *settings;
 691   const gchar *key;
 692
 693 #ifdef G_OS_WIN32
 694   extern gchar *_glib_get_locale_dir (void);
 695   gchar *tmp;
 696 #endif
 697
 698   setlocale (LC_ALL, "");
 699   textdomain (GETTEXT_PACKAGE);
 700
 701 #ifdef G_OS_WIN32
 702   tmp = _glib_get_locale_dir ();
 703   bindtextdomain (GETTEXT_PACKAGE, tmp);
 704   g_free (tmp);
 705 #else
 706   bindtextdomain (GETTEXT_PACKAGE, GLIB_LOCALE_DIR);
 707 #endif
 708
 709 #ifdef HAVE_BIND_TEXTDOMAIN_CODESET
 710   bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
 711 #endif
 712
 713   if (argc < 2)
 714     return gsettings_help (FALSE, NULL);
 715
 716   else if (strcmp (argv[1], "help") == 0)
 717     return gsettings_help (TRUE, argv[2]);
 718
 719   else if (argc == 2 && strcmp (argv[1], "list-schemas") == 0)
 720     function = gsettings_list_schemas;
 721
 722   else if (argc == 2 && strcmp (argv[1], "list-relocatable-schemas") == 0)
 723     function = gsettings_list_relocatable_schemas;
 724
 725   else if (argc == 3 && strcmp (argv[1], "list-keys") == 0)
 726     function = gsettings_list_keys;
 727
 728   else if (argc == 3 && strcmp (argv[1], "list-children") == 0)
 729     function = gsettings_list_children;
 730
 731   else if ((argc == 2 || argc == 3) && strcmp (argv[1], "list-recursively") == 0)
 732     function = gsettings_list_recursively;
 733
 734   else if (argc == 4 && strcmp (argv[1], "range") == 0)
 735     function = gsettings_range;
 736
 737   else if (argc == 4 && strcmp (argv[1], "get") == 0)
 738     function = gsettings_get;
 739
 740   else if (argc == 5 && strcmp (argv[1], "set") == 0)
 741     function = gsettings_set;
 742
 743   else if (argc == 4 && strcmp (argv[1], "reset") == 0)
 744     function = gsettings_reset;
 745
 746   else if (argc == 3 && strcmp (argv[1], "reset-recursively") == 0)
 747     function = gsettings_reset_recursively;
 748
 749   else if (argc == 4 && strcmp (argv[1], "writable") == 0)
 750     function = gsettings_writable;
 751
 752   else if ((argc == 3 || argc == 4) && strcmp (argv[1], "monitor") == 0)
 753     function = gsettings_monitor;
 754
 755   else
 756     return gsettings_help (FALSE, argv[1]);
 757
 758   g_type_init ();
 759
 760   if (argc > 2)
 761     {
 762       gchar **parts;
 763
 764       if (argv[2][0] == '\0')
 765         {
 766           g_printerr (_("Empty schema name given\n"));
 767           return 1;
 768         }
 769
 770       parts = g_strsplit (argv[2], ":", 2);
 771
 772       if (parts[1])
 773         {
 774           if (!check_relocatable_schema (parts[0]) || !check_path (parts[1]))
 775             return 1;
 776
 777           settings = g_settings_new_with_path (parts[0], parts[1]);
 778         }
 779       else
 780         {
 781           if (!check_schema (parts[0]))
 782             return 1;
 783
 784           settings = g_settings_new (parts[0]);
 785         }
 786
 787       g_strfreev (parts);
 788     }
 789   else
 790     settings = NULL;
 791
 792   if (argc > 3)
 793     {
 794       if (!check_key (settings, argv[3]))
 795         return 1;
 796
 797       key = argv[3];
 798     }
 799   else
 800     key = NULL;
 801
 802   (* function) (settings, key, argc > 4 ? argv[4] : NULL);
 803
 804   if (settings != NULL)
 805     g_object_unref (settings);
 806
 807   return 0;
 808 }