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glib/gio/gsettings-tool.c
Giovanni Campagna 466432830c gsettings-tool: allow specifying custom schema dirs 
It happens that one wants to customize settings for plugins or
shell extensions, that installing schemas in nonstandard locations.
This patch adds the --schemadir option to gsettings, and ensure
that the appropriate schema is found.

https://bugzilla.gnome.org/show_bug.cgi?id=666415
2011-12-19 10:33:55 -05:00

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/*
* Copyright © 2010 Codethink Limited
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include <gio/gio.h>
#include <gi18n.h>
#include <locale.h>
#include <string.h>
#include <stdlib.h>
static gboolean
contained (const gchar * const *items,
const gchar *item)
{
while (*items)
if (strcmp (*items++, item) == 0)
return TRUE;
return FALSE;
}
static gboolean
is_relocatable_schema (GSettingsSchema *schema)
{
return g_settings_schema_get_path (schema) == NULL;
}
static gboolean
check_relocatable_schema (GSettingsSchema *schema,
const gchar *schema_id)
{
if (schema == NULL)
{
g_printerr (_("No such schema '%s'\n"), schema_id);
return FALSE;
}
if (!is_relocatable_schema (schema))
{
g_printerr (_("Schema '%s' is not relocatable "
"(path must not be specified)\n"),
schema_id);
return FALSE;
}
return TRUE;
}
static gboolean
check_schema (GSettingsSchema *schema,
const gchar *schema_id)
{
if (schema == NULL)
{
g_printerr (_("No such schema '%s'\n"), schema_id);
return FALSE;
}
if (is_relocatable_schema (schema))
{
g_printerr (_("Schema '%s' is relocatable "
"(path must be specified)\n"),
schema_id);
return FALSE;
}
return TRUE;
}
static gboolean
check_path (const gchar *path)
{
if (path[0] == '\0')
{
g_printerr (_("Empty path given.\n"));
return FALSE;
}
if (path[0] != '/')
{
g_printerr (_("Path must begin with a slash (/)\n"));
return FALSE;
}
if (!g_str_has_suffix (path, "/"))
{
g_printerr (_("Path must end with a slash (/)\n"));
return FALSE;
}
if (strstr (path, "//"))
{
g_printerr (_("Path must not contain two adjacent slashes (//)\n"));
return FALSE;
}
return TRUE;
}
static gboolean
check_key (GSettings *settings,
const gchar *key)
{
gboolean good;
gchar **keys;
keys = g_settings_list_keys (settings);
good = contained ((const gchar **) keys, key);
g_strfreev (keys);
if (good)
return TRUE;
g_printerr (_("No such key '%s'\n"), key);
return FALSE;
}
static void
output_list (const gchar * const *list)
{
gint i;
for (i = 0; list[i]; i++)
g_print ("%s\n", list[i]);
}
static void
gsettings_list_schemas (GSettings *settings,
const gchar *key,
const gchar *value)
{
output_list (g_settings_list_schemas ());
}
static void
gsettings_list_relocatable_schemas (GSettings *settings,
const gchar *key,
const gchar *value)
{
output_list (g_settings_list_relocatable_schemas ());
}
static void
gsettings_list_keys (GSettings *settings,
const gchar *key,
const gchar *value)
{
gchar **keys;
keys = g_settings_list_keys (settings);
output_list ((const gchar **) keys);
g_strfreev (keys);
}
static void
gsettings_list_children (GSettings *settings,
const gchar *key,
const gchar *value)
{
gchar **children;
gint max = 0;
gint i;
children = g_settings_list_children (settings);
for (i = 0; children[i]; i++)
if (strlen (children[i]) > max)
max = strlen (children[i]);
for (i = 0; children[i]; i++)
{
GSettings *child;
GSettingsSchema *schema;
gchar *path;
child = g_settings_get_child (settings, children[i]);
g_object_get (child,
"settings-schema", &schema,
"path", &path,
NULL);
if (g_settings_schema_get_path (schema) != NULL)
g_print ("%-*s %s\n", max, children[i], g_settings_schema_get_id (schema));
else
g_print ("%-*s %s:%s\n", max, children[i], g_settings_schema_get_id (schema), path);
g_object_unref (child);
g_settings_schema_unref (schema);
g_free (path);
}
g_strfreev (children);
}
static void
enumerate (GSettings *settings)
{
gchar **keys;
gchar *schema;
gint i;
g_object_get (settings, "schema", &schema, NULL);
keys = g_settings_list_keys (settings);
for (i = 0; keys[i]; i++)
{
GVariant *value;
gchar *printed;
value = g_settings_get_value (settings, keys[i]);
printed = g_variant_print (value, TRUE);
g_print ("%s %s %s\n", schema, keys[i], printed);
g_variant_unref (value);
g_free (printed);
}
g_free (schema);
g_strfreev (keys);
}
static void
gsettings_list_recursively (GSettings *settings,
const gchar *key,
const gchar *value)
{
if (settings)
{
gchar **children;
gint i;
enumerate (settings);
children = g_settings_list_children (settings);
for (i = 0; children[i]; i++)
{
GSettings *child;
GSettingsSchema *schema;
child = g_settings_get_child (settings, children[i]);
g_object_get (child, "settings-schema", &schema, NULL);
enumerate (child);
g_object_unref (child);
g_settings_schema_unref (schema);
}
g_strfreev (children);
}
else
{
const gchar * const *schemas;
gint i;
schemas = g_settings_list_schemas ();
for (i = 0; schemas[i]; i++)
{
settings = g_settings_new (schemas[i]);
enumerate (settings);
g_object_unref (settings);
}
}
}
static void
gsettings_range (GSettings *settings,
const gchar *key,
const gchar *value)
{
GVariant *range, *detail;
const gchar *type;
range = g_settings_get_range (settings, key);
g_variant_get (range, "(&sv)", &type, &detail);
if (strcmp (type, "type") == 0)
g_print ("type %s\n", g_variant_get_type_string (detail) + 1);
else if (strcmp (type, "range") == 0)
{
GVariant *min, *max;
gchar *smin, *smax;
g_variant_get (detail, "(**)", &min, &max);
smin = g_variant_print (min, FALSE);
smax = g_variant_print (max, FALSE);
g_print ("range %s %s %s\n",
g_variant_get_type_string (min), smin, smax);
g_variant_unref (min);
g_variant_unref (max);
g_free (smin);
g_free (smax);
}
else if (strcmp (type, "enum") == 0 || strcmp (type, "flags") == 0)
{
GVariantIter iter;
GVariant *item;
g_print ("%s\n", type);
g_variant_iter_init (&iter, detail);
while (g_variant_iter_loop (&iter, "*", &item))
{
gchar *printed;
printed = g_variant_print (item, FALSE);
g_print ("%s\n", printed);
g_free (printed);
}
}
g_variant_unref (detail);
g_variant_unref (range);
}
static void
gsettings_get (GSettings *settings,
const gchar *key,
const gchar *value_)
{
GVariant *value;
gchar *printed;
value = g_settings_get_value (settings, key);
printed = g_variant_print (value, TRUE);
g_print ("%s\n", printed);
g_variant_unref (value);
g_free (printed);
}
static void
gsettings_reset (GSettings *settings,
const gchar *key,
const gchar *value)
{
g_settings_reset (settings, key);
g_settings_sync ();
}
static void
reset_all_keys (GSettings *settings)
{
gchar **keys;
gint i;
keys = g_settings_list_keys (settings);
for (i = 0; keys[i]; i++)
{
g_settings_reset (settings, keys[i]);
}
g_strfreev (keys);
}
static void
gsettings_reset_recursively (GSettings *settings,
const gchar *key,
const gchar *value)
{
gchar **children;
gint i;
g_settings_delay (settings);
reset_all_keys (settings);
children = g_settings_list_children (settings);
for (i = 0; children[i]; i++)
{
GSettings *child;
child = g_settings_get_child (settings, children[i]);
reset_all_keys (child);
g_object_unref (child);
}
g_strfreev (children);
g_settings_apply (settings);
g_settings_sync ();
}
static void
gsettings_writable (GSettings *settings,
const gchar *key,
const gchar *value)
{
g_print ("%s\n",
g_settings_is_writable (settings, key) ?
"true" : "false");
}
static void
value_changed (GSettings *settings,
const gchar *key,
gpointer user_data)
{
GVariant *value;
gchar *printed;
value = g_settings_get_value (settings, key);
printed = g_variant_print (value, TRUE);
g_print ("%s: %s\n", key, printed);
g_variant_unref (value);
g_free (printed);
}
static void
gsettings_monitor (GSettings *settings,
const gchar *key,
const gchar *value)
{
if (key)
{
gchar *name;
name = g_strdup_printf ("changed::%s", key);
g_signal_connect (settings, name, G_CALLBACK (value_changed), NULL);
}
else
g_signal_connect (settings, "changed", G_CALLBACK (value_changed), NULL);
g_main_loop_run (g_main_loop_new (NULL, FALSE));
}
static void
gsettings_set (GSettings *settings,
const gchar *key,
const gchar *value)
{
const GVariantType *type;
GError *error = NULL;
GVariant *existing;
GVariant *new;
gchar *freeme = NULL;
existing = g_settings_get_value (settings, key);
type = g_variant_get_type (existing);
new = g_variant_parse (type, value, NULL, NULL, &error);
/* If that didn't work and the type is string then we should assume
* that the user is just trying to set a string directly and forgot
* the quotes (or had them consumed by the shell).
*
* If the user started with a quote then we assume that some deeper
* problem is at play and we want the failure in that case.
*
* Consider:
*
* gsettings set x.y.z key "'i don't expect this to work'"
*
* Note that we should not just add quotes and try parsing again, but
* rather assume that the user is providing us with a bare string.
* Assume we added single quotes, then consider this case:
*
* gsettings set x.y.z key "i'd expect this to work"
*
* A similar example could be given for double quotes.
*
* Avoid that whole mess by just using g_variant_new_string().
*/
if (new == NULL &&
g_variant_type_equal (type, G_VARIANT_TYPE_STRING) &&
value[0] != '\'' && value[0] != '"')
{
g_clear_error (&error);
new = g_variant_new_string (value);
}
if (new == NULL)
{
g_printerr ("%s\n", error->message);
exit (1);
}
if (!g_settings_range_check (settings, key, new))
{
g_printerr (_("The provided value is outside of the valid range\n"));
g_variant_unref (new);
exit (1);
}
g_settings_set_value (settings, key, new);
g_variant_unref (existing);
g_variant_unref (new);
g_settings_sync ();
g_free (freeme);
}
static int
gsettings_help (gboolean requested,
const gchar *command)
{
const gchar *description;
const gchar *synopsis;
GString *string;
string = g_string_new (NULL);
if (command == NULL)
;
else if (strcmp (command, "help") == 0)
{
description = _("Print help");
synopsis = "[COMMAND]";
}
else if (strcmp (command, "list-schemas") == 0)
{
description = _("List the installed (non-relocatable) schemas");
synopsis = "";
}
else if (strcmp (command, "list-relocatable-schemas") == 0)
{
description = _("List the installed relocatable schemas");
synopsis = "";
}
else if (strcmp (command, "list-keys") == 0)
{
description = _("List the keys in SCHEMA");
synopsis = N_("SCHEMA[:PATH]");
}
else if (strcmp (command, "list-children") == 0)
{
description = _("List the children of SCHEMA");
synopsis = N_("SCHEMA[:PATH]");
}
else if (strcmp (command, "list-recursively") == 0)
{
description = _("List keys and values, recursively\n"
"If no SCHEMA is given, list all keys\n");
synopsis = N_("[SCHEMA[:PATH]]");
}
else if (strcmp (command, "get") == 0)
{
description = _("Get the value of KEY");
synopsis = N_("SCHEMA[:PATH] KEY");
}
else if (strcmp (command, "range") == 0)
{
description = _("Query the range of valid values for KEY");
synopsis = N_("SCHEMA[:PATH] KEY");
}
else if (strcmp (command, "set") == 0)
{
description = _("Set the value of KEY to VALUE");
synopsis = N_("SCHEMA[:PATH] KEY VALUE");
}
else if (strcmp (command, "reset") == 0)
{
description = _("Reset KEY to its default value");
synopsis = N_("SCHEMA[:PATH] KEY");
}
else if (strcmp (command, "reset-recursively") == 0)
{
description = _("Reset all keys in SCHEMA to their defaults");
synopsis = N_("SCHEMA[:PATH]");
}
else if (strcmp (command, "writable") == 0)
{
description = _("Check if KEY is writable");
synopsis = N_("SCHEMA[:PATH] KEY");
}
else if (strcmp (command, "monitor") == 0)
{
description = _("Monitor KEY for changes.\n"
"If no KEY is specified, monitor all keys in SCHEMA.\n"
"Use ^C to stop monitoring.\n");
synopsis = N_("SCHEMA[:PATH] [KEY]");
}
else
{
g_string_printf (string, _("Unknown command %s\n\n"), command);
requested = FALSE;
command = NULL;
}
if (command == NULL)
{
g_string_append (string,
_("Usage:\n"
" gsettings [--schemadir SCHEMADIR] COMMAND [ARGS...]\n"
"\n"
"Commands:\n"
" help Show this information\n"
" list-schemas List installed schemas\n"
" list-relocatable-schemas List relocatable schemas\n"
" list-keys List keys in a schema\n"
" list-children List children of a schema\n"
" list-recursively List keys and values, recursively\n"
" range Queries the range of a key\n"
" get Get the value of a key\n"
" set Set the value of a key\n"
" reset Reset the value of a key\n"
" reset-recursively Reset all values in a given schema\n"
" writable Check if a key is writable\n"
" monitor Watch for changes\n"
"\n"
"Use 'gsettings help COMMAND' to get detailed help.\n\n"));
}
else
{
g_string_append_printf (string, _("Usage:\n gsettings [--schemadir SCHEMADIR] %s %s\n\n%s\n\n"),
command, synopsis[0] ? _(synopsis) : "", description);
g_string_append (string, _("Arguments:\n"));
g_string_append (string,
_(" SCHEMADIR A directory to search for additional schemas\n"));
if (strstr (synopsis, "[COMMAND]"))
g_string_append (string,
_(" COMMAND The (optional) command to explain\n"));
else if (strstr (synopsis, "SCHEMA"))
g_string_append (string,
_(" SCHEMA The name of the schema\n"
" PATH The path, for relocatable schemas\n"));
if (strstr (synopsis, "[KEY]"))
g_string_append (string,
_(" KEY The (optional) key within the schema\n"));
else if (strstr (synopsis, "KEY"))
g_string_append (string,
_(" KEY The key within the schema\n"));
if (strstr (synopsis, "VALUE"))
g_string_append (string,
_(" VALUE The value to set\n"));
g_string_append (string, "\n");
}
if (requested)
g_print ("%s", string->str);
else
g_printerr ("%s\n", string->str);
g_string_free (string, TRUE);
return requested ? 0 : 1;
}
int
main (int argc, char **argv)
{
void (* function) (GSettings *, const gchar *, const gchar *);
GSettingsSchemaSource *schema_source;
GSettingsSchema *schema;
GSettings *settings;
const gchar *key;
#ifdef G_OS_WIN32
extern gchar *_glib_get_locale_dir (void);
gchar *tmp;
#endif
setlocale (LC_ALL, "");
textdomain (GETTEXT_PACKAGE);
#ifdef G_OS_WIN32
tmp = _glib_get_locale_dir ();
bindtextdomain (GETTEXT_PACKAGE, tmp);
g_free (tmp);
#else
bindtextdomain (GETTEXT_PACKAGE, GLIB_LOCALE_DIR);
#endif
#ifdef HAVE_BIND_TEXTDOMAIN_CODESET
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif
if (argc < 2)
return gsettings_help (FALSE, NULL);
schema_source = g_settings_schema_source_ref (g_settings_schema_source_get_default ());
if (argc > 3 && g_str_equal (argv[1], "--schemadir"))
{
GSettingsSchemaSource *parent = schema_source;
GError *error = NULL;
schema_source = g_settings_schema_source_new_from_directory (argv[2], parent, FALSE, &error);
g_settings_schema_source_unref (parent);
if (schema_source == NULL)
{
g_printerr ("Could not load schemas from %s: %s\n", argv[2], error->message);
g_clear_error (&error);
return 1;
}
/* shift remaining arguments (not correct wrt argv[0], but doesn't matter) */
argv = argv + 2;
argc -= 2;
}
if (strcmp (argv[1], "help") == 0)
return gsettings_help (TRUE, argv[2]);
else if (argc == 2 && strcmp (argv[1], "list-schemas") == 0)
function = gsettings_list_schemas;
else if (argc == 2 && strcmp (argv[1], "list-relocatable-schemas") == 0)
function = gsettings_list_relocatable_schemas;
else if (argc == 3 && strcmp (argv[1], "list-keys") == 0)
function = gsettings_list_keys;
else if (argc == 3 && strcmp (argv[1], "list-children") == 0)
function = gsettings_list_children;
else if ((argc == 2 || argc == 3) && strcmp (argv[1], "list-recursively") == 0)
function = gsettings_list_recursively;
else if (argc == 4 && strcmp (argv[1], "range") == 0)
function = gsettings_range;
else if (argc == 4 && strcmp (argv[1], "get") == 0)
function = gsettings_get;
else if (argc == 5 && strcmp (argv[1], "set") == 0)
function = gsettings_set;
else if (argc == 4 && strcmp (argv[1], "reset") == 0)
function = gsettings_reset;
else if (argc == 3 && strcmp (argv[1], "reset-recursively") == 0)
function = gsettings_reset_recursively;
else if (argc == 4 && strcmp (argv[1], "writable") == 0)
function = gsettings_writable;
else if ((argc == 3 || argc == 4) && strcmp (argv[1], "monitor") == 0)
function = gsettings_monitor;
else
return gsettings_help (FALSE, argv[1]);
g_type_init ();
if (argc > 2)
{
gchar **parts;
if (argv[2][0] == '\0')
{
g_printerr (_("Empty schema name given\n"));
return 1;
}
parts = g_strsplit (argv[2], ":", 2);
schema = g_settings_schema_source_lookup (schema_source, parts[0], TRUE);
if (parts[1])
{
if (!check_relocatable_schema (schema, parts[0]) || !check_path (parts[1]))
return 1;
settings = g_settings_new_full (schema, NULL, parts[1]);
}
else
{
if (!check_schema (schema, parts[0]))
return 1;
settings = g_settings_new_full (schema, NULL, NULL);
}
g_strfreev (parts);
}
else
{
settings = NULL;
schema = NULL;
}
if (argc > 3)
{
if (!check_key (settings, argv[3]))
return 1;
key = argv[3];
}
else
key = NULL;
(* function) (settings, key, argc > 4 ? argv[4] : NULL);
if (settings != NULL)
g_object_unref (settings);
if (schema != NULL)
g_settings_schema_unref (schema);
g_settings_schema_source_unref (schema_source);
return 0;
}
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