1 /* -*- mode: C; c-file-style: "gnu" -*- */ 2 /* dir-watch-dnotify.c OS specific directory change notification for message bus 3 * 4 * Copyright (C) 2003 Red Hat, Inc. 5 * 6 * Licensed under the Academic Free License version 2.1 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <config.h> 25 26 #define _GNU_SOURCE 27 #include <stdlib.h> 28 #include <unistd.h> 29 #include <fcntl.h> 30 31 #include <dbus/dbus-internals.h> 32 #include "dir-watch.h" 33 34 #define MAX_DIRS_TO_WATCH 128 35 36 /* use a static array to avoid handling OOM */ 37 static int fds[MAX_DIRS_TO_WATCH]; 38 static int num_fds = 0; 39 40 void 41 bus_watch_directory (const char *dir, BusContext *context) 42 { 43 int fd; 44 45 _dbus_assert (dir != NULL); 46 47 if (num_fds >= MAX_DIRS_TO_WATCH ) 48 { 49 _dbus_warn ("Cannot watch config directory '%s'. Already watching %d directories\n", dir, MAX_DIRS_TO_WATCH); 50 goto out; 51 } 52 53 fd = open (dir, O_RDONLY); 54 if (fd < 0) 55 { 56 _dbus_warn ("Cannot open directory '%s'; error '%s'\n", dir, _dbus_strerror (errno)); 57 goto out; 58 } 59 60 if (fcntl (fd, F_NOTIFY, DN_DELETE|DN_RENAME|DN_MODIFY) == -1) 61 { 62 _dbus_warn ("Cannot setup D_NOTIFY for '%s' error '%s'\n", dir, _dbus_strerror (errno)); 63 close (fd); 64 goto out; 65 } 66 67 fds[num_fds++] = fd; 68 _dbus_verbose ("Added watch on config directory '%s'\n", dir); 69 70 out: 71 ; 72 } 73 74 void 75 bus_drop_all_directory_watches (void) 76 { 77 int i; 78 79 _dbus_verbose ("Dropping all watches on config directories\n"); 80 81 for (i = 0; i < num_fds; i++) 82 { 83 if (close (fds[i]) != 0) 84 { 85 _dbus_verbose ("Error closing fd %d for config directory watch\n", fds[i]); 86 } 87 } 88 89 num_fds = 0; 90 } 91
