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glib/gio/gsettings-tool.c
Ryan Lortie d5bd531d96 Cleanup the GSettingsBackend API 
This is a substantial ABI break.  Rebuild dconf.
2010-07-22 18:39:50 -04:00

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20 KiB
C
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/* GLIB - Library of useful routines for C programming
* Copyright (C) 2010 Red Hat, Inc.
*
* 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 License, 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: Matthias Clasen
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <locale.h>
#include <gi18n.h>
#include <gio.h>
static gchar *
pick_word_at (const gchar *s,
gint cursor,
gint *out_word_begins_at)
{
gint begin;
gint end;
if (s[0] == '\0')
{
if (out_word_begins_at != NULL)
*out_word_begins_at = -1;
return NULL;
}
if (g_ascii_isspace (s[cursor]) &&
((cursor > 0 && g_ascii_isspace (s[cursor-1])) || cursor == 0))
{
if (out_word_begins_at != NULL)
*out_word_begins_at = cursor;
return g_strdup ("");
}
while (!g_ascii_isspace (s[cursor - 1]) && cursor > 0)
cursor--;
begin = cursor;
end = begin;
while (!g_ascii_isspace (s[end]) && s[end] != '\0')
end++;
if (out_word_begins_at != NULL)
*out_word_begins_at = begin;
return g_strndup (s + begin, end - begin);
}
static gint
usage (gint *argc,
gchar **argv[],
gboolean use_stdout)
{
GOptionContext *context;
gchar *s;
g_set_prgname (g_path_get_basename ((*argv)[0]));
context = g_option_context_new (_("COMMAND"));
g_option_context_set_help_enabled (context, FALSE);
s = g_strdup_printf (
_("Commands:\n"
" help Show this information\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"
" monitor Monitor a key for changes\n"
" writable Check if a key is writable\n"
"\n"
"Use '%s COMMAND --help' to get help for individual commands.\n"),
g_get_prgname ());
g_option_context_set_description (context, s);
g_free (s);
s = g_option_context_get_help (context, FALSE, NULL);
if (use_stdout)
g_print ("%s", s);
else
g_printerr ("%s", s);
g_free (s);
g_option_context_free (context);
return use_stdout ? 0 : 1;
}
static void
remove_arg (gint num, gint *argc, gchar **argv[])
{
gint n;
g_assert (num <= (*argc));
for (n = num; (*argv)[n] != NULL; n++)
(*argv)[n] = (*argv)[n+1];
(*argv)[n] = NULL;
(*argc) = (*argc) - 1;
}
static void
modify_argv0_for_command (gint *argc,
gchar **argv[],
const gchar *command)
{
gchar *s;
g_assert (g_strcmp0 ((*argv)[1], command) == 0);
remove_arg (1, argc, argv);
s = g_strdup_printf ("%s %s", (*argv)[0], command);
(*argv)[0] = s;
}
static gboolean
schema_exists (const gchar *name)
{
const gchar * const *schemas;
gint i;
schemas = g_settings_list_schemas ();
for (i = 0; schemas[i]; i++)
if (g_strcmp0 (name, schemas[i]) == 0)
return TRUE;
return FALSE;
}
static void
list_schemas (const gchar *prefix)
{
const gchar * const *schemas;
gint i;
schemas = g_settings_list_schemas ();
for (i = 0; schemas[i]; i++)
if (prefix == NULL || g_str_has_prefix (schemas[i], prefix))
g_print ("%s \n", schemas[i]);
}
static gboolean
key_exists (GSettings *settings,
const gchar *name)
{
const gchar **keys;
gint i;
gboolean ret;
ret = FALSE;
keys = g_settings_list_items (settings);
for (i = 0; keys[i]; i++)
if (!g_str_has_suffix (keys[i], "/") &&
g_strcmp0 (keys[i], name) == 0)
{
ret = TRUE;
break;
}
g_free (keys);
return ret;
}
static void
list_keys (GSettings *settings,
const gchar *prefix)
{
const gchar **keys;
gint i;
keys = g_settings_list_items (settings);
for (i = 0; keys[i]; i++)
{
if (!g_str_has_suffix (keys[i], "/") &&
(prefix == NULL || g_str_has_prefix (keys[i], prefix)))
g_print ("%s \n", keys[i]);
}
g_free (keys);
}
static void
list_options (GOptionContext *context,
const gchar *prefix)
{
/* FIXME extract options from context */
const gchar *options[] = { "--help", "--path", NULL };
gint i;
for (i = 0; options[i]; i++)
if (g_str_has_prefix (options[i], prefix))
g_print ("%s \n", options[i]);
}
static gint
handle_get (gint *argc,
gchar **argv[],
gboolean request_completion,
gchar *completion_cur,
gchar *completion_prev)
{
gchar *schema;
gchar *path;
gchar *key;
GSettings *settings;
GVariant *v;
GOptionContext *context;
GOptionEntry entries[] = {
{ "path", 'p', 0, G_OPTION_ARG_STRING, &path, N_("Specify the path for the schema"), N_("PATH") },
{ NULL }
};
GError *error;
gint ret = 1;
modify_argv0_for_command (argc, argv, "get");
context = g_option_context_new (_("SCHEMA KEY"));
g_option_context_set_help_enabled (context, FALSE);
g_option_context_set_summary (context, _("Get the value of KEY"));
g_option_context_set_description (context,
_("Arguments:\n"
" SCHEMA The id of the schema\n"
" KEY The name of the key\n"));
g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
settings = NULL;
path = NULL;
schema = NULL;
key = NULL;
error = NULL;
if (!g_option_context_parse (context, argc, argv, NULL))
{
if (!request_completion)
{
gchar *s;
s = g_option_context_get_help (context, FALSE, NULL);
g_printerr ("%s", s);
g_free (s);
goto out;
}
}
if (*argc > 1)
schema = (*argv)[1];
if (*argc > 2)
key = (*argv)[2];
if (request_completion && completion_cur[0] == '-')
{
list_options (context, completion_cur);
ret = 0;
goto out;
}
if (request_completion && !schema_exists (schema))
{
list_schemas (schema);
ret = 0;
goto out;
}
if (path)
settings = g_settings_new_with_path (schema, path);
else
settings = g_settings_new (schema);
if (request_completion && !key_exists (settings, key))
{
list_keys (settings, key);
ret = 0;
goto out;
}
if (!request_completion)
{
v = g_settings_get_value (settings, key);
g_print ("%s\n", g_variant_print (v, FALSE));
g_variant_unref (v);
ret = 0;
}
out:
if (settings)
g_object_unref (settings);
g_option_context_free (context);
return ret;
}
static gint
handle_set (gint *argc,
gchar **argv[],
gboolean request_completion,
gchar *completion_cur,
gchar *completion_prev)
{
gchar *schema;
gchar *path;
gchar *key;
gchar *value;
GSettings *settings;
GVariant *v, *default_v;
const GVariantType *type;
GOptionContext *context;
GOptionEntry entries[] = {
{ "path", 'p', 0, G_OPTION_ARG_STRING, &path, N_("Specify the path for the schema"), N_("PATH") },
{ NULL }
};
GError *error;
gint ret = 1;
modify_argv0_for_command (argc, argv, "set");
context = g_option_context_new (_("SCHEMA KEY VALUE"));
g_option_context_set_help_enabled (context, FALSE);
g_option_context_set_summary (context, _("Set the value of KEY"));
g_option_context_set_description (context,
_("Arguments:\n"
" SCHEMA The id of the schema\n"
" KEY The name of the key\n"
" VALUE The value to set key to, as a serialized GVariant\n"));
g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
settings = NULL;
path = NULL;
schema = NULL;
key = NULL;
error = NULL;
if (!g_option_context_parse (context, argc, argv, NULL))
{
if (!request_completion)
{
gchar *s;
s = g_option_context_get_help (context, FALSE, NULL);
g_printerr ("%s", s);
g_free (s);
goto out;
}
}
if (*argc > 1)
schema = (*argv)[1];
if (*argc > 2)
key = (*argv)[2];
if (*argc > 3)
value = (*argv)[3];
if (request_completion && completion_cur[0] == '-')
{
list_options (context, completion_cur);
ret = 0;
goto out;
}
if (request_completion && !schema_exists (schema))
{
list_schemas (schema);
ret = 0;
goto out;
}
if (path)
settings = g_settings_new_with_path (schema, path);
else
settings = g_settings_new (schema);
if (request_completion && !key_exists (settings, key))
{
list_keys (settings, key);
ret = 0;
goto out;
}
if (!request_completion)
{
default_v = g_settings_get_value (settings, key);
type = g_variant_get_type (default_v);
error = NULL;
v = g_variant_parse (type, value, NULL, NULL, &error);
g_variant_unref (default_v);
if (v == NULL)
{
g_printerr ("%s\n", error->message);
goto out;
}
if (!g_settings_set_value (settings, key, v))
{
g_printerr (_("Key %s is not writable\n"), key);
goto out;
}
g_settings_sync ();
ret = 0;
}
out:
if (settings)
g_object_unref (settings);
g_option_context_free (context);
return ret;
}
static gint
handle_reset (gint *argc,
gchar **argv[],
gboolean request_completion,
gchar *completion_cur,
gchar *completion_prev)
{
gchar *schema;
gchar *path;
gchar *key;
GSettings *settings;
GOptionContext *context;
GOptionEntry entries[] = {
{ "path", 'p', 0, G_OPTION_ARG_STRING, &path, N_("Specify the path for the schema"), N_("PATH") },
{ NULL }
};
GError *error;
gint ret = 1;
modify_argv0_for_command (argc, argv, "reset");
context = g_option_context_new (_("SCHEMA KEY VALUE"));
g_option_context_set_help_enabled (context, FALSE);
g_option_context_set_summary (context, _("Sets KEY to its default value"));
g_option_context_set_description (context,
_("Arguments:\n"
" SCHEMA The id of the schema\n"
" KEY The name of the key\n"));
g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
settings = NULL;
path = NULL;
schema = NULL;
key = NULL;
error = NULL;
if (!g_option_context_parse (context, argc, argv, NULL))
{
if (!request_completion)
{
gchar *s;
s = g_option_context_get_help (context, FALSE, NULL);
g_printerr ("%s", s);
g_free (s);
goto out;
}
}
if (*argc > 1)
schema = (*argv)[1];
if (*argc > 2)
key = (*argv)[2];
if (request_completion && completion_cur[0] == '-')
{
list_options (context, completion_cur);
ret = 0;
goto out;
}
if (request_completion && !schema_exists (schema))
{
list_schemas (schema);
ret = 0;
goto out;
}
if (path)
settings = g_settings_new_with_path (schema, path);
else
settings = g_settings_new (schema);
if (request_completion && !key_exists (settings, key))
{
list_keys (settings, key);
ret = 0;
goto out;
}
if (!request_completion)
{
g_settings_reset (settings, key);
g_settings_sync ();
ret = 0;
}
out:
if (settings)
g_object_unref (settings);
g_option_context_free (context);
return ret;
}
static gint
handle_writable (gint *argc,
gchar **argv[],
gboolean request_completion,
gchar *completion_cur,
gchar *completion_prev)
{
gchar *schema;
gchar *path;
gchar *key;
GSettings *settings;
GOptionContext *context;
GOptionEntry entries[] = {
{ "path", 'p', 0, G_OPTION_ARG_STRING, &path, N_("Specify the path for the schema"), N_("PATH") },
{ NULL }
};
GError *error;
gint ret = 1;
modify_argv0_for_command (argc, argv, "writable");
context = g_option_context_new (_("SCHEMA KEY"));
g_option_context_set_help_enabled (context, FALSE);
g_option_context_set_summary (context, _("Find out whether KEY is writable"));
g_option_context_set_description (context,
_("Arguments:\n"
" SCHEMA The id of the schema\n"
" KEY The name of the key\n"));
g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
settings = NULL;
path = NULL;
schema = NULL;
key = NULL;
error = NULL;
if (!g_option_context_parse (context, argc, argv, NULL))
{
if (!request_completion)
{
gchar *s;
s = g_option_context_get_help (context, FALSE, NULL);
g_printerr ("%s", s);
g_free (s);
goto out;
}
}
if (*argc > 1)
schema = (*argv)[1];
if (*argc > 2)
key = (*argv)[2];
if (request_completion && completion_cur[0] == '-')
{
list_options (context, completion_cur);
ret = 0;
goto out;
}
if (request_completion && !schema_exists (schema))
{
list_schemas (schema);
ret = 0;
goto out;
}
if (path)
settings = g_settings_new_with_path (schema, path);
else
settings = g_settings_new (schema);
if (request_completion && !key_exists (settings, key))
{
list_keys (settings, key);
ret = 0;
goto out;
}
if (!request_completion)
{
if (g_settings_is_writable (settings, key))
g_print ("true\n");
else
g_print ("false\n");
ret = 0;
}
out:
if (settings)
g_object_unref (settings);
g_option_context_free (context);
return ret;
}
static void
key_changed (GSettings *settings,
const gchar *key)
{
GVariant *v;
gchar *value;
v = g_settings_get_value (settings, key);
value = g_variant_print (v, FALSE);
g_print ("%s\n", value);
g_free (value);
g_variant_unref (v);
}
static gint
handle_monitor (gint *argc,
gchar **argv[],
gboolean request_completion,
gchar *completion_cur,
gchar *completion_prev)
{
gchar *schema;
gchar *path;
gchar *key;
GSettings *settings;
gchar *detailed_signal;
GMainLoop *loop;
GOptionContext *context;
GOptionEntry entries[] = {
{ "path", 'p', 0, G_OPTION_ARG_STRING, &path, N_("Specify the path for the schema"), N_("PATH") },
{ NULL }
};
GError *error;
gint ret = 1;
modify_argv0_for_command (argc, argv, "monitor");
context = g_option_context_new (_("SCHEMA KEY"));
g_option_context_set_help_enabled (context, FALSE);
g_option_context_set_summary (context,
_("Monitor KEY for changes and print the changed values.\n"
"Monitoring will continue until the process is terminated."));
g_option_context_set_description (context,
_("Arguments:\n"
" SCHEMA The id of the schema\n"
" KEY The name of the key\n"));
g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
settings = NULL;
path = NULL;
schema = NULL;
key = NULL;
error = NULL;
if (!g_option_context_parse (context, argc, argv, NULL))
{
if (!request_completion)
{
gchar *s;
s = g_option_context_get_help (context, FALSE, NULL);
g_printerr ("%s", s);
g_free (s);
goto out;
}
}
if (*argc > 1)
schema = (*argv)[1];
if (*argc > 2)
key = (*argv)[2];
if (request_completion && completion_cur[0] == '-')
{
list_options (context, completion_cur);
ret = 0;
goto out;
}
if (request_completion && !schema_exists (schema))
{
list_schemas (schema);
ret = 0;
goto out;
}
if (path)
settings = g_settings_new_with_path (schema, path);
else
settings = g_settings_new (schema);
if (request_completion && !key_exists (settings, key))
{
list_keys (settings, key);
ret = 0;
goto out;
}
if (!request_completion)
{
detailed_signal = g_strdup_printf ("changed::%s", key);
g_signal_connect (settings, detailed_signal,
G_CALLBACK (key_changed), NULL);
loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (loop);
g_main_loop_unref (loop);
ret = 0;
}
out:
if (settings)
g_object_unref (settings);
g_option_context_free (context);
return ret;
}
int
main (int argc, char *argv[])
{
gboolean ret;
gchar *command;
gboolean request_completion;
gchar *completion_cur;
gchar *completion_prev;
setlocale (LC_ALL, "");
g_type_init ();
ret = 1;
completion_cur = NULL;
completion_prev = NULL;
request_completion = FALSE;
if (argc < 2)
{
ret = usage (&argc, &argv, FALSE);
goto out;
}
again:
command = argv[1];
if (g_strcmp0 (command, "help") == 0)
{
if (!request_completion)
ret = usage (&argc, &argv, TRUE);
}
else if (g_strcmp0 (command, "get") == 0)
ret = handle_get (&argc, &argv, request_completion, completion_cur, completion_prev);
else if (g_strcmp0 (command, "set") == 0)
ret = handle_set (&argc, &argv, request_completion, completion_cur, completion_prev);
else if (g_strcmp0 (command, "reset") == 0)
ret = handle_reset (&argc, &argv, request_completion, completion_cur, completion_prev);
else if (g_strcmp0 (command, "monitor") == 0)
ret = handle_monitor (&argc, &argv, request_completion, completion_cur, completion_prev);
else if (g_strcmp0 (command, "writable") == 0)
ret = handle_writable (&argc, &argv, request_completion, completion_cur, completion_prev);
else if (g_strcmp0 (command, "complete") == 0 && argc == 4 && !request_completion)
{
gchar *completion_line;
gint completion_point;
gchar *endp;
gchar **completion_argv;
gint completion_argc;
gint cur_begin;
request_completion = TRUE;
completion_line = argv[2];
completion_point = strtol (argv[3], &endp, 10);
if (endp == argv[3] || *endp != '\0')
goto out;
if (!g_shell_parse_argv (completion_line,
&completion_argc,
&completion_argv,
NULL))
{
/* can't parse partical cmdline, don't attempt completion */
goto out;
}
completion_prev = NULL;
completion_cur = pick_word_at (completion_line, completion_point, &cur_begin);
if (cur_begin > 0)
{
gint prev_end;
for (prev_end = cur_begin - 1; prev_end >= 0; prev_end--)
{
if (!g_ascii_isspace (completion_line[prev_end]))
{
completion_prev = pick_word_at (completion_line, prev_end, NULL);
break;
}
}
}
argc = completion_argc;
argv = completion_argv;
ret = 0;
goto again;
}
else
{
if (request_completion)
{
g_print ("help \nget \nmonitor \nwritable \nset \nreset \n");
ret = 0;
}
else
{
g_printerr (_("Unknown command '%s'\n"), argv[1]);
ret = usage (&argc, &argv, FALSE);
}
}
out:
g_free (completion_cur);
g_free (completion_prev);
return ret;
}
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