Add a minimal commandline utility to poke GSettings

gio/Makefile.am

@@ -497,7 +497,7 @@ gio-2.0.lib: libgio-2.0.la gio.def
 	lib -machine:@LIB_EXE_MACHINE_FLAG@ -name:libgio-2.0-$(LT_CURRENT_MINUS_AGE).dll -def:gio.def -out:$@
 
 dist_bin_SCRIPTS = gsettings-schema-convert
-bin_PROGRAMS = gio-querymodules gschema-compile
+bin_PROGRAMS = gio-querymodules gschema-compile gsettings-tool
 
 gio_querymodules_SOURCES = gio-querymodules.c
 gio_querymodules_LDADD	 = \
@@ -514,6 +514,12 @@ gschema_compile_SOURCES = \
 	gvdb/gvdb-builder.c		\
 	gschema-compile.c
 
+gsettings_tool_LDADD = \
+	$(top_builddir)/glib/libglib-2.0.la		\
+	libgio-2.0.la
+gsettings_tool_SOURCES = gsettings-tool.c
+
+
 schemadir = $(datadir)/glib-2.0/schemas
 dist_schema_DATA = gschema.dtd
 

gio/gsettings-tool.c

@@ -0,0 +1,169 @@
+/* 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 <gio.h>
+
+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);
+}
+
+int
+main (int argc, char *argv[])
+{
+  gboolean do_get = FALSE;
+  gboolean do_set = FALSE;
+  gboolean do_writable = FALSE;
+  gboolean do_monitor = FALSE;
+
+  gchar *path = NULL;
+  gchar *schema;
+  gchar *key;
+  gchar *value;
+
+  GSettings *settings;
+  GVariant *v;
+
+  GOptionContext *context;
+  GOptionEntry entries[] = {
+    { "get", 'g', 0, G_OPTION_ARG_NONE, &do_get, "get a key", NULL },
+    { "set", 's', 0, G_OPTION_ARG_NONE, &do_set, "set a key", NULL },
+    { "writable", 'w', 0, G_OPTION_ARG_NONE, &do_writable, "check if key is writable", NULL },
+    { "monitor", 'm', 0, G_OPTION_ARG_NONE, &do_monitor, "monitor key for changes", NULL },
+    { "path", 'p', 0, G_OPTION_ARG_STRING, &path, "path for the schema" },
+    { NULL }
+  };
+  GError *error;
+
+  g_type_init ();
+
+  context = g_option_context_new ("SCHEMA KEY [VALUE]");
+
+  g_option_context_set_summary (context, "Manipulate GSettings configuration");
+
+  g_option_context_add_main_entries (context, entries, NULL);
+
+  error = NULL;
+  if (!g_option_context_parse (context, &argc, &argv, &error))
+    {
+      g_printerr ("%s\n", error->message);
+      return 1;
+    }
+
+  if (do_get + do_set + do_writable + do_monitor != 1)
+    {
+      g_printerr ("You must specify exactly one of --get, --set, --writable or --monitor\n");
+      return 1;
+    }
+
+  if (do_get || do_writable || do_monitor)
+    {
+      if (argc != 3)
+        {
+          g_printerr ("You must specify a schema and a key\n");
+          return 1;
+        }
+
+      schema = argv[1];
+      key = argv[2];
+    }
+  else if (do_set)
+    {
+      if (argc != 4)
+        {
+          g_printerr ("You must specify a schema, a key and a value\n");
+          return 1;
+        }
+
+      schema = argv[1];
+      key = argv[2];
+      value = argv[3];
+    }
+
+  settings = g_settings_new_with_path (schema, path);
+
+  if (do_get)
+    {
+      v = g_settings_get_value (settings, key);
+
+      g_print ("%s\n", g_variant_print (v, FALSE));
+
+      return 0;
+    }
+  else if (do_writable)
+    {
+      gboolean writable;
+
+      if (g_settings_is_writable (settings, key))
+        g_print ("true\n");
+      else
+        g_print ("false\n");
+
+      return 0;
+    }
+  else if (do_set)
+    {
+      const GVariantType *type;
+      GError *error;
+
+      v = g_settings_get_value (settings, key);
+      type = g_variant_get_type (v);
+      g_variant_unref (v);
+
+      error = NULL;
+      v = g_variant_parse (type, value, NULL, NULL, &error);
+      if (v == NULL)
+        {
+          g_printerr ("%s\n", error->message);
+          return 1;
+        }
+
+      if (!g_settings_set_value (settings, key, v))
+        {
+          g_printerr ("Key %s is not writable\n", key);
+          return 1;
+        }
+    }
+  else if (do_monitor)
+    {
+      gchar *detailed_signal;
+      GMainLoop *loop;
+
+      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);
+    }
+
+  return 0;
+}