gio/gio-tool-monitor.c - third_party/glib - Git at Google

 /*
  * Copyright 2015 Red Hat, Inc.
  *
  * SPDX-License-Identifier: LGPL-2.1-or-later
  *
  * 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 2.1 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, see <http://www.gnu.org/licenses/>.
  *
  * Author: Matthias Clasen <mclasen@redhat.com>
  */

 #include "config.h"

 #include <gio/gio.h>
 #include <gi18n.h>

 #include "gio-tool.h"

 static gchar **watch_dirs;
 static gchar **watch_files;
 static gchar **watch_direct;
 static gchar **watch_silent;
 static gchar **watch_default;
 static gboolean no_moves;
 static gboolean mounts;

 static const GOptionEntry entries[] = {
   { "dir", 'd', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_dirs,
       N_("Monitor a directory (default: depends on type)"), N_("LOCATION") },
   { "file", 'f', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_files,
       N_("Monitor a file (default: depends on type)"), N_("LOCATION") },
   { "direct", 'D', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_direct,
       N_("Monitor a file directly (notices changes made via hardlinks)"), N_("LOCATION") },
   { "silent", 's', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_silent,
       N_("Monitors a file directly, but doesn’t report changes"), N_("LOCATION") },
   { "no-moves", 'n', 0, G_OPTION_ARG_NONE, &no_moves,
       N_("Report moves and renames as simple deleted/created events"), NULL },
   { "mounts", 'm', 0, G_OPTION_ARG_NONE, &mounts,
       N_("Watch for mount events"), NULL },
   { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_default,
       NULL, NULL },
   G_OPTION_ENTRY_NULL
 };

 static void
 watch_callback (GFileMonitor      *monitor,
                 GFile             *child,
                 GFile             *other,
                 GFileMonitorEvent  event_type,
                 gpointer           user_data)
 {
   gchar *child_str;
   gchar *other_str;

   g_assert (child);

   if (g_file_is_native (child))
     child_str = g_file_get_path (child);
   else
     child_str = g_file_get_uri (child);

   if (other)
     {
       if (g_file_is_native (other))
         other_str = g_file_get_path (other);
       else
         other_str = g_file_get_uri (other);
     }
   else
     other_str = g_strdup ("(none)");

   g_print ("%s: ", (gchar *) user_data);
   switch (event_type)
     {
     case G_FILE_MONITOR_EVENT_CHANGED:
       g_assert (!other);
       g_print ("%s: changed", child_str);
       break;
     case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
       g_assert (!other);
       g_print ("%s: changes done", child_str);
       break;
     case G_FILE_MONITOR_EVENT_DELETED:
       g_assert (!other);
       g_print ("%s: deleted", child_str);
       break;
     case G_FILE_MONITOR_EVENT_CREATED:
       g_assert (!other);
       g_print ("%s: created", child_str);
       break;
     case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
       g_assert (!other);
       g_print ("%s: attributes changed", child_str);
       break;
     case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
       g_assert (!other);
       g_print ("%s: pre-unmount", child_str);
       break;
     case G_FILE_MONITOR_EVENT_UNMOUNTED:
       g_assert (!other);
       g_print ("%s: unmounted", child_str);
       break;
     case G_FILE_MONITOR_EVENT_MOVED_IN:
       g_print ("%s: moved in", child_str);
       if (other)
         g_print (" (from %s)", other_str);
       break;
     case G_FILE_MONITOR_EVENT_MOVED_OUT:
       g_print ("%s: moved out", child_str);
       if (other)
         g_print (" (to %s)", other_str);
       break;
     case G_FILE_MONITOR_EVENT_RENAMED:
       g_assert (other);
       g_print ("%s: renamed to %s\n", child_str, other_str);
       break;

     case G_FILE_MONITOR_EVENT_MOVED:
     default:
       g_assert_not_reached ();
     }

   g_free (child_str);
   g_free (other_str);
   g_print ("\n");
 }

 typedef enum
 {
   WATCH_DIR,
   WATCH_FILE,
   WATCH_AUTO
 } WatchType;

 static gboolean
 add_watch (const gchar       *cmdline,
            WatchType          watch_type,
            GFileMonitorFlags  flags,
            gboolean           connect_handler)
 {
   GFileMonitor *monitor = NULL;
   GError *error = NULL;
   GFile *file;

   file = g_file_new_for_commandline_arg (cmdline);

   if (watch_type == WATCH_AUTO)
     {
       GFileInfo *info;
       guint32 type;

       info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TYPE, G_FILE_QUERY_INFO_NONE, NULL, &error);
       if (!info)
         goto err;

       type = g_file_info_get_attribute_uint32 (info, G_FILE_ATTRIBUTE_STANDARD_TYPE);
       watch_type = (type == G_FILE_TYPE_DIRECTORY) ? WATCH_DIR : WATCH_FILE;
     }

   if (watch_type == WATCH_DIR)
     monitor = g_file_monitor_directory (file, flags, NULL, &error);
   else
     monitor = g_file_monitor (file, flags, NULL, &error);

   if (!monitor)
     goto err;

   if (connect_handler)
     g_signal_connect (monitor, "changed", G_CALLBACK (watch_callback), g_strdup (cmdline));

   monitor = NULL; /* leak */
   g_object_unref (file);

   return TRUE;

 err:
   print_file_error (file, error->message);
   g_error_free (error);
   g_object_unref (file);

   return FALSE;
 }

 int
 handle_monitor (int argc, gchar *argv[], gboolean do_help)
 {
   GOptionContext *context;
   gchar *param;
   GError *error = NULL;
   GFileMonitorFlags flags;
   guint i;

   g_set_prgname ("gio monitor");

   /* Translators: commandline placeholder */
   param = g_strdup_printf ("%s…", _("LOCATION"));
   context = g_option_context_new (param);
   g_free (param);
   g_option_context_set_help_enabled (context, FALSE);
   g_option_context_set_summary (context,
     _("Monitor files or directories for changes."));
   g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);

   if (do_help)
     {
       show_help (context, NULL);
       g_option_context_free (context);
       return 0;
     }

   if (!g_option_context_parse (context, &argc, &argv, &error))
     {
       show_help (context, error->message);
       g_error_free (error);
       g_option_context_free (context);
       return 1;
     }

   if (!watch_dirs && !watch_files && !watch_direct && !watch_silent && !watch_default)
     {
       show_help (context, _("No locations given"));
       g_option_context_free (context);
       return 1;
     }

   g_option_context_free (context);

   flags = (no_moves ? 0 : G_FILE_MONITOR_WATCH_MOVES) |
           (mounts ? G_FILE_MONITOR_WATCH_MOUNTS : 0);

   if (watch_dirs)
     {
       for (i = 0; watch_dirs[i]; i++)
         if (!add_watch (watch_dirs[i], WATCH_DIR, flags, TRUE))
           return 1;
     }

   if (watch_files)
     {
       for (i = 0; watch_files[i]; i++)
         if (!add_watch (watch_files[i], WATCH_FILE, flags, TRUE))
           return 1;
     }

   if (watch_direct)
     {
       for (i = 0; watch_direct[i]; i++)
         if (!add_watch (watch_direct[i], WATCH_FILE, flags | G_FILE_MONITOR_WATCH_HARD_LINKS, TRUE))
           return 1;
     }

   if (watch_silent)
     {
       for (i = 0; watch_silent[i]; i++)
         if (!add_watch (watch_silent[i], WATCH_FILE, flags | G_FILE_MONITOR_WATCH_HARD_LINKS, FALSE))
           return 1;
     }

   if (watch_default)
     {
       for (i = 0; watch_default[i]; i++)
         if (!add_watch (watch_default[i], WATCH_AUTO, flags, TRUE))
           return 1;
     }

   while (TRUE)
     g_main_context_iteration (NULL, TRUE);

   return 0;
 }
	/*
	* Copyright 2015 Red Hat, Inc.
	*
	* SPDX-License-Identifier: LGPL-2.1-or-later
	*
	* 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 2.1 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, see <http://www.gnu.org/licenses/>.
	*
	* Author: Matthias Clasen <mclasen@redhat.com>
	*/

	#include "config.h"

	#include <gio/gio.h>
	#include <gi18n.h>

	#include "gio-tool.h"

	static gchar **watch_dirs;
	static gchar **watch_files;
	static gchar **watch_direct;
	static gchar **watch_silent;
	static gchar **watch_default;
	static gboolean no_moves;
	static gboolean mounts;

	static const GOptionEntry entries[] = {
	{ "dir", 'd', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_dirs,
	N_("Monitor a directory (default: depends on type)"), N_("LOCATION") },
	{ "file", 'f', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_files,
	N_("Monitor a file (default: depends on type)"), N_("LOCATION") },
	{ "direct", 'D', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_direct,
	N_("Monitor a file directly (notices changes made via hardlinks)"), N_("LOCATION") },
	{ "silent", 's', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_silent,
	N_("Monitors a file directly, but doesn’t report changes"), N_("LOCATION") },
	{ "no-moves", 'n', 0, G_OPTION_ARG_NONE, &no_moves,
	N_("Report moves and renames as simple deleted/created events"), NULL },
	{ "mounts", 'm', 0, G_OPTION_ARG_NONE, &mounts,
	N_("Watch for mount events"), NULL },
	{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_default,
	NULL, NULL },
	G_OPTION_ENTRY_NULL
	};

	static void
	watch_callback (GFileMonitor *monitor,
	GFile *child,
	GFile *other,
	GFileMonitorEvent event_type,
	gpointer user_data)
	{
	gchar *child_str;
	gchar *other_str;

	g_assert (child);

	if (g_file_is_native (child))
	child_str = g_file_get_path (child);
	else
	child_str = g_file_get_uri (child);

	if (other)
	{
	if (g_file_is_native (other))
	other_str = g_file_get_path (other);
	else
	other_str = g_file_get_uri (other);
	}
	else
	other_str = g_strdup ("(none)");

	g_print ("%s: ", (gchar *) user_data);
	switch (event_type)
	{
	case G_FILE_MONITOR_EVENT_CHANGED:
	g_assert (!other);
	g_print ("%s: changed", child_str);
	break;
	case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
	g_assert (!other);
	g_print ("%s: changes done", child_str);
	break;
	case G_FILE_MONITOR_EVENT_DELETED:
	g_assert (!other);
	g_print ("%s: deleted", child_str);
	break;
	case G_FILE_MONITOR_EVENT_CREATED:
	g_assert (!other);
	g_print ("%s: created", child_str);
	break;
	case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
	g_assert (!other);
	g_print ("%s: attributes changed", child_str);
	break;
	case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
	g_assert (!other);
	g_print ("%s: pre-unmount", child_str);
	break;
	case G_FILE_MONITOR_EVENT_UNMOUNTED:
	g_assert (!other);
	g_print ("%s: unmounted", child_str);
	break;
	case G_FILE_MONITOR_EVENT_MOVED_IN:
	g_print ("%s: moved in", child_str);
	if (other)
	g_print (" (from %s)", other_str);
	break;
	case G_FILE_MONITOR_EVENT_MOVED_OUT:
	g_print ("%s: moved out", child_str);
	if (other)
	g_print (" (to %s)", other_str);
	break;
	case G_FILE_MONITOR_EVENT_RENAMED:
	g_assert (other);
	g_print ("%s: renamed to %s\n", child_str, other_str);
	break;

	case G_FILE_MONITOR_EVENT_MOVED:
	default:
	g_assert_not_reached ();
	}

	g_free (child_str);
	g_free (other_str);
	g_print ("\n");
	}

	typedef enum
	{
	WATCH_DIR,
	WATCH_FILE,
	WATCH_AUTO
	} WatchType;

	static gboolean
	add_watch (const gchar *cmdline,
	WatchType watch_type,
	GFileMonitorFlags flags,
	gboolean connect_handler)
	{
	GFileMonitor *monitor = NULL;
	GError *error = NULL;
	GFile *file;

	file = g_file_new_for_commandline_arg (cmdline);

	if (watch_type == WATCH_AUTO)
	{
	GFileInfo *info;
	guint32 type;

	info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TYPE, G_FILE_QUERY_INFO_NONE, NULL, &error);
	if (!info)
	goto err;

	type = g_file_info_get_attribute_uint32 (info, G_FILE_ATTRIBUTE_STANDARD_TYPE);
	watch_type = (type == G_FILE_TYPE_DIRECTORY) ? WATCH_DIR : WATCH_FILE;
	}

	if (watch_type == WATCH_DIR)
	monitor = g_file_monitor_directory (file, flags, NULL, &error);
	else
	monitor = g_file_monitor (file, flags, NULL, &error);

	if (!monitor)
	goto err;

	if (connect_handler)
	g_signal_connect (monitor, "changed", G_CALLBACK (watch_callback), g_strdup (cmdline));

	monitor = NULL; /* leak */
	g_object_unref (file);

	return TRUE;

	err:
	print_file_error (file, error->message);
	g_error_free (error);
	g_object_unref (file);

	return FALSE;
	}

	int
	handle_monitor (int argc, gchar *argv[], gboolean do_help)
	{
	GOptionContext *context;
	gchar *param;
	GError *error = NULL;
	GFileMonitorFlags flags;
	guint i;

	g_set_prgname ("gio monitor");

	/* Translators: commandline placeholder */
	param = g_strdup_printf ("%s…", _("LOCATION"));
	context = g_option_context_new (param);
	g_free (param);
	g_option_context_set_help_enabled (context, FALSE);
	g_option_context_set_summary (context,
	_("Monitor files or directories for changes."));
	g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);

	if (do_help)
	{
	show_help (context, NULL);
	g_option_context_free (context);
	return 0;
	}

	if (!g_option_context_parse (context, &argc, &argv, &error))
	{
	show_help (context, error->message);
	g_error_free (error);
	g_option_context_free (context);
	return 1;
	}

	if (!watch_dirs && !watch_files && !watch_direct && !watch_silent && !watch_default)
	{
	show_help (context, _("No locations given"));
	g_option_context_free (context);
	return 1;
	}

	g_option_context_free (context);

	flags = (no_moves ? 0 : G_FILE_MONITOR_WATCH_MOVES) \|
	(mounts ? G_FILE_MONITOR_WATCH_MOUNTS : 0);

	if (watch_dirs)
	{
	for (i = 0; watch_dirs[i]; i++)
	if (!add_watch (watch_dirs[i], WATCH_DIR, flags, TRUE))
	return 1;
	}

	if (watch_files)
	{
	for (i = 0; watch_files[i]; i++)
	if (!add_watch (watch_files[i], WATCH_FILE, flags, TRUE))
	return 1;
	}

	if (watch_direct)
	{
	for (i = 0; watch_direct[i]; i++)
	if (!add_watch (watch_direct[i], WATCH_FILE, flags \| G_FILE_MONITOR_WATCH_HARD_LINKS, TRUE))
	return 1;
	}

	if (watch_silent)
	{
	for (i = 0; watch_silent[i]; i++)
	if (!add_watch (watch_silent[i], WATCH_FILE, flags \| G_FILE_MONITOR_WATCH_HARD_LINKS, FALSE))
	return 1;
	}

	if (watch_default)
	{
	for (i = 0; watch_default[i]; i++)
	if (!add_watch (watch_default[i], WATCH_AUTO, flags, TRUE))
	return 1;
	}

	while (TRUE)
	g_main_context_iteration (NULL, TRUE);

	return 0;
	}