gio/gio-tool-monitor.c

   1 /*
   2  * Copyright 2015 Red Hat, Inc.
   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, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Author: Matthias Clasen <mclasen@redhat.com>
  18  */
  19
  20 #include "config.h"
  21
  22 #include <gio/gio.h>
  23 #include <gi18n.h>
  24
  25 #include "gio-tool.h"
  26
  27 static gchar **watch_dirs;
  28 static gchar **watch_files;
  29 static gchar **watch_direct;
  30 static gchar **watch_silent;
  31 static gchar **watch_default;
  32 static gboolean no_moves;
  33 static gboolean mounts;
  34
  35 static const GOptionEntry entries[] = {
  36   { "dir", 'd', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_dirs,
  37       N_("Monitor a directory (default: depends on type)"), N_("LOCATION") },
  38   { "file", 'f', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_files,
  39       N_("Monitor a file (default: depends on type)"), N_("LOCATION") },
  40   { "direct", 'D', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_direct,
  41       N_("Monitor a file directly (notices changes made via hardlinks)"), N_("LOCATION") },
  42   { "silent", 's', 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_silent,
  43       N_("Monitors a file directly, but doesn’t report changes"), N_("LOCATION") },
  44   { "no-moves", 'n', 0, G_OPTION_ARG_NONE, &no_moves,
  45       N_("Report moves and renames as simple deleted/created events"), NULL },
  46   { "mounts", 'm', 0, G_OPTION_ARG_NONE, &mounts,
  47       N_("Watch for mount events"), NULL },
  48   { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &watch_default },
  49   { NULL }
  50 };
  51
  52 static void
  53 watch_callback (GFileMonitor      *monitor,
  54                 GFile             *child,
  55                 GFile             *other,
  56                 GFileMonitorEvent  event_type,
  57                 gpointer           user_data)
  58 {
  59   gchar *child_str;
  60   gchar *other_str;
  61
  62   g_assert (child);
  63
  64   if (g_file_is_native (child))
  65     child_str = g_file_get_path (child);
  66   else
  67     child_str = g_file_get_uri (child);
  68
  69   if (other)
  70     {
  71       if (g_file_is_native (other))
  72         other_str = g_file_get_path (other);
  73       else
  74         other_str = g_file_get_uri (other);
  75     }
  76   else
  77     other_str = g_strdup ("(none)");
  78
  79   g_print ("%s: ", (gchar *) user_data);
  80   switch (event_type)
  81     {
  82     case G_FILE_MONITOR_EVENT_CHANGED:
  83       g_assert (!other);
  84       g_print ("%s: changed", child_str);
  85       break;
  86     case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
  87       g_assert (!other);
  88       g_print ("%s: changes done", child_str);
  89       break;
  90     case G_FILE_MONITOR_EVENT_DELETED:
  91       g_assert (!other);
  92       g_print ("%s: deleted", child_str);
  93       break;
  94     case G_FILE_MONITOR_EVENT_CREATED:
  95       g_assert (!other);
  96       g_print ("%s: created", child_str);
  97       break;
  98     case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
  99       g_assert (!other);
 100       g_print ("%s: attributes changed", child_str);
 101       break;
 102     case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
 103       g_assert (!other);
 104       g_print ("%s: pre-unmount", child_str);
 105       break;
 106     case G_FILE_MONITOR_EVENT_UNMOUNTED:
 107       g_assert (!other);
 108       g_print ("%s: unmounted", child_str);
 109       break;
 110     case G_FILE_MONITOR_EVENT_MOVED_IN:
 111       g_print ("%s: moved in", child_str);
 112       if (other)
 113         g_print (" (from %s)", other_str);
 114       break;
 115     case G_FILE_MONITOR_EVENT_MOVED_OUT:
 116       g_print ("%s: moved out", child_str);
 117       if (other)
 118         g_print (" (to %s)", other_str);
 119       break;
 120     case G_FILE_MONITOR_EVENT_RENAMED:
 121       g_assert (other);
 122       g_print ("%s: renamed to %s\n", child_str, other_str);
 123       break;
 124
 125     case G_FILE_MONITOR_EVENT_MOVED:
 126     default:
 127       g_assert_not_reached ();
 128     }
 129
 130   g_free (child_str);
 131   g_free (other_str);
 132   g_print ("\n");
 133 }
 134
 135 typedef enum
 136 {
 137   WATCH_DIR,
 138   WATCH_FILE,
 139   WATCH_AUTO
 140 } WatchType;
 141
 142 static gboolean
 143 add_watch (const gchar       *cmdline,
 144            WatchType          watch_type,
 145            GFileMonitorFlags  flags,
 146            gboolean           connect_handler)
 147 {
 148   GFileMonitor *monitor = NULL;
 149   GError *error = NULL;
 150   GFile *file;
 151
 152   file = g_file_new_for_commandline_arg (cmdline);
 153
 154   if (watch_type == WATCH_AUTO)
 155     {
 156       GFileInfo *info;
 157       guint32 type;
 158
 159       info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_TYPE, G_FILE_QUERY_INFO_NONE, NULL, &error);
 160       if (!info)
 161         goto err;
 162
 163       type = g_file_info_get_attribute_uint32 (info, G_FILE_ATTRIBUTE_STANDARD_TYPE);
 164       watch_type = (type == G_FILE_TYPE_DIRECTORY) ? WATCH_DIR : WATCH_FILE;
 165     }
 166
 167   if (watch_type == WATCH_DIR)
 168     monitor = g_file_monitor_directory (file, flags, NULL, &error);
 169   else
 170     monitor = g_file_monitor (file, flags, NULL, &error);
 171
 172   if (!monitor)
 173     goto err;
 174
 175   if (connect_handler)
 176     g_signal_connect (monitor, "changed", G_CALLBACK (watch_callback), g_strdup (cmdline));
 177
 178   monitor = NULL; /* leak */
 179
 180   return TRUE;
 181
 182 err:
 183   g_printerr ("error: %s: %s", cmdline, error->message);
 184   g_error_free (error);
 185
 186   return FALSE;
 187 }
 188
 189 int
 190 handle_monitor (int argc, gchar *argv[], gboolean do_help)
 191 {
 192   GOptionContext *context;
 193   gchar *param;
 194   GError *error = NULL;
 195   GFileMonitorFlags flags;
 196   guint total = 0;
 197   guint i;
 198
 199   g_set_prgname ("gio monitor");
 200
 201   /* Translators: commandline placeholder */
 202   param = g_strdup_printf ("[%s...]", _("LOCATION"));
 203   context = g_option_context_new (param);
 204   g_free (param);
 205   g_option_context_set_help_enabled (context, FALSE);
 206   g_option_context_set_summary (context,
 207     _("Monitor files or directories for changes."));
 208   g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
 209
 210   if (do_help)
 211     {
 212       show_help (context, NULL);
 213       return 0;
 214     }
 215
 216   if (!g_option_context_parse (context, &argc, &argv, &error))
 217     {
 218       show_help (context, error->message);
 219       g_error_free (error);
 220       return 1;
 221     }
 222
 223   g_option_context_free (context);
 224
 225   flags = (no_moves ? 0 : G_FILE_MONITOR_WATCH_MOVES) |
 226           (mounts ? G_FILE_MONITOR_WATCH_MOUNTS : 0);
 227
 228   if (watch_dirs)
 229     {
 230       for (i = 0; watch_dirs[i]; i++)
 231         if (!add_watch (watch_dirs[i], WATCH_DIR, flags, TRUE))
 232           return 1;
 233       total++;
 234     }
 235
 236   if (watch_files)
 237     {
 238       for (i = 0; watch_files[i]; i++)
 239         if (!add_watch (watch_files[i], WATCH_FILE, flags, TRUE))
 240           return 1;
 241       total++;
 242     }
 243
 244   if (watch_direct)
 245     {
 246       for (i = 0; watch_direct[i]; i++)
 247         if (!add_watch (watch_direct[i], WATCH_FILE, flags | G_FILE_MONITOR_WATCH_HARD_LINKS, TRUE))
 248           return 1;
 249       total++;
 250     }
 251
 252   if (watch_silent)
 253     {
 254       for (i = 0; watch_silent[i]; i++)
 255         if (!add_watch (watch_silent[i], WATCH_FILE, flags | G_FILE_MONITOR_WATCH_HARD_LINKS, FALSE))
 256           return 1;
 257       total++;
 258     }
 259
 260   if (watch_default)
 261     {
 262       for (i = 0; watch_default[i]; i++)
 263         if (!add_watch (watch_default[i], WATCH_AUTO, flags, TRUE))
 264           return 1;
 265       total++;
 266     }
 267
 268   if (!total)
 269     {
 270       g_printerr ("gio: Must give at least one file to monitor\n");
 271       return 1;
 272     }
 273
 274   while (TRUE)
 275     g_main_context_iteration (NULL, TRUE);
 276
 277   return 0;
 278 }