From d387411488a093f77f4cd752b75e8bf8360550c6 Mon Sep 17 00:00:00 2001 From: "John (J5) Palmieri" Date: Tue, 8 Aug 2006 22:08:39 +0000 Subject: * dbus/dbus-sysdeps.h: * dbus/dbus-sysdeps.c: * dbus/dbus-string.c: s/_dbus_printf_length/_dbus_printf_string_upper_bound to comform with GLib's function which does the same thing * configure.in: * bus/Makefile.am: * bus/dir-watch-default.c: * bus/dir-watch-dnotify.c: * bus/dir-watch-kqueue.c: Add kqueue directory watching for freebsd and split the directory watching code into seperate files per method/arch (patches from Timothy Redaelli ) --- bus/dir-watch-kqueue.c | 177 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 bus/dir-watch-kqueue.c (limited to 'bus/dir-watch-kqueue.c') diff --git a/bus/dir-watch-kqueue.c b/bus/dir-watch-kqueue.c new file mode 100644 index 00000000..b08fd39f --- /dev/null +++ b/bus/dir-watch-kqueue.c @@ -0,0 +1,177 @@ +/* -*- mode: C; c-file-style: "gnu" -*- */ +/* dir-watch-kqueue.c OS specific directory change notification for message bus + * + * Copyright (C) 2003 Red Hat, Inc. + * + * Licensed under the Academic Free License version 2.1 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include + +#include +#include +#include +#include +#include +#include +#include "bus.h" +#include + +#include +#include "dir-watch.h" + +#define MAX_DIRS_TO_WATCH 128 + +static int kq = -1; +static int fds[MAX_DIRS_TO_WATCH]; +static int num_fds = 0; +static DBusWatch *watch = NULL; +static DBusLoop *loop = NULL; + +static dbus_bool_t +_kqueue_watch_callback (DBusWatch *watch, unsigned int condition, void *data) +{ + return dbus_watch_handle (watch, condition); +} + +static dbus_bool_t +_handle_kqueue_watch (DBusWatch *watch, unsigned int flags, void *data) +{ + struct kevent ev; + struct timespec nullts = { 0, 0 }; + int res; + pid_t pid; + + res = kevent (kq, NULL, 0, &ev, 1, &nullts); + + /* Sleep for half a second to avoid a race when files are install(1)'d + * to system.d. */ + usleep(500000); + + if (res > 0) + { + pid = getpid (); + _dbus_verbose ("Sending SIGHUP signal on reception of a kevent\n"); + (void) kill (pid, SIGHUP); + } + else if (res < 0 && errno == EBADF) + { + kq = -1; + if (watch != NULL) + { + _dbus_loop_remove_watch (loop, watch, _kqueue_watch_callback, NULL); + _dbus_watch_unref (watch); + watch = NULL; + } + pid = getpid (); + _dbus_verbose ("Sending SIGHUP signal since kqueue has been closed\n"); + (void) kill (pid, SIGHUP); + } + + return TRUE; +} + +void +bus_watch_directory (const char *dir, void *userdata) +{ + int fd; + struct kevent ev; + + _dbus_assert (dir != NULL); + + if (kq < 0) + { + + kq = kqueue (); + if (kq < 0) + { + _dbus_warn ("Cannot create kqueue; error '%s'\n", _dbus_strerror (errno)); + goto out; + } + + loop = userdata; + + watch = _dbus_watch_new (kq, DBUS_WATCH_READABLE, TRUE, + _handle_kqueue_watch, NULL, NULL); + + if (watch == NULL) + { + _dbus_warn ("Unable to create kqueue watch\n"); + close (kq); + kq = -1; + goto out; + } + + if (!_dbus_loop_add_watch (loop, watch, _kqueue_watch_callback, + NULL, NULL)) + { + _dbus_warn ("Unable to add reload watch to main loop"); + close (kq); + kq = -1; + _dbus_watch_unref (watch); + watch = NULL; + goto out; + } + } + + if (num_fds >= MAX_DIRS_TO_WATCH ) + { + _dbus_warn ("Cannot watch config directory '%s'. Already watching %d directories\n", dir, MAX_DIRS_TO_WATCH); + goto out; + } + + fd = open (dir, O_RDONLY); + if (fd < 0) + { + _dbus_warn ("Cannot open directory '%s'; error '%s'\n", dir, _dbus_strerror (errno)); + goto out; + } + + EV_SET (&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, + NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_RENAME, 0, 0); + if (kevent (kq, &ev, 1, NULL, 0, NULL) == -1) + { + _dbus_warn ("Cannot setup a kevent for '%s'; error '%s'\n", dir, _dbus_strerror (errno)); + close (fd); + goto out; + } + + fds[num_fds++] = fd; + _dbus_verbose ("Added kqueue watch on config directory '%s'\n", dir); + + out: + ; +} + +void +bus_drop_all_directory_watches (void) +{ + int i; + + _dbus_verbose ("Dropping all watches on config directories\n"); + + for (i = 0; i < num_fds; i++) + { + if (close (fds[i]) != 0) + { + _dbus_verbose ("Error closing fd %d for config directory watch\n", fds[i]); + } + } + + num_fds = 0; +} -- cgit