1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 #ifdef HAVE_ERRNO_H 31 #include <errno.h> 32 #endif 33 34 #include <dbus/dbus-internals.h> 35 #include "dir-watch.h" 36 37 #define MAX_DIRS_TO_WATCH 128 38 39 /* use a static array to avoid handling OOM */ 40 static int fds[MAX_DIRS_TO_WATCH]; 41 static int num_fds = 0; 42 43 void 44 bus_watch_directory (const char *dir, BusContext *context) 45 { 46 int fd; 47 48 _dbus_assert (dir != NULL); 49 50 if (num_fds >= MAX_DIRS_TO_WATCH ) 51 { 52 _dbus_warn ("Cannot watch config directory '%s'. Already watching %d directories\n", dir, MAX_DIRS_TO_WATCH); 53 goto out; 54 } 55 56 fd = open (dir, O_RDONLY); 57 if (fd < 0) 58 { 59 _dbus_warn ("Cannot open directory '%s'; error '%s'\n", dir, _dbus_strerror (errno)); 60 goto out; 61 } 62 63 if (fcntl (fd, F_NOTIFY, DN_CREATE|DN_DELETE|DN_RENAME|DN_MODIFY) == -1) 64 { 65 _dbus_warn ("Cannot setup D_NOTIFY for '%s' error '%s'\n", dir, _dbus_strerror (errno)); 66 close (fd); 67 goto out; 68 } 69 70 fds[num_fds++] = fd; 71 _dbus_verbose ("Added watch on config directory '%s'\n", dir); 72 73 out: 74 ; 75 } 76 77 void 78 bus_drop_all_directory_watches (void) 79 { 80 int i; 81 82 _dbus_verbose ("Dropping all watches on config directories\n"); 83 84 for (i = 0; i < num_fds; i++) 85 { 86 if (close (fds[i]) != 0) 87 { 88 _dbus_verbose ("Error closing fd %d for config directory watch\n", fds[i]); 89 } 90 } 91 92 num_fds = 0; 93 } 94
