diff options
Diffstat (limited to 'bus/dir-watch-inotify.c')
| -rw-r--r-- | bus/dir-watch-inotify.c | 65 |
1 files changed, 36 insertions, 29 deletions
diff --git a/bus/dir-watch-inotify.c b/bus/dir-watch-inotify.c index 0f3c155c..1622cde2 100644 --- a/bus/dir-watch-inotify.c +++ b/bus/dir-watch-inotify.c @@ -38,6 +38,8 @@ #include "dir-watch.h" #define MAX_DIRS_TO_WATCH 128 +#define INOTIFY_EVENT_SIZE (sizeof(struct inotify_event)) +#define INOTIFY_BUF_LEN (1024 * (INOTIFY_EVENT_SIZE + 16)) /* use a static array to avoid handling OOM */ static int wds[MAX_DIRS_TO_WATCH]; @@ -55,33 +57,43 @@ _inotify_watch_callback (DBusWatch *watch, unsigned int condition, void *data) static dbus_bool_t _handle_inotify_watch (DBusWatch *watch, unsigned int flags, void *data) { - struct inotify_event ev; - size_t res; + char buffer[INOTIFY_BUF_LEN]; + ssize_t ret = 0; + int i = 0; pid_t pid; - res = read (inotify_fd, &ev, sizeof(ev)); + ret = read (inotify_fd, buffer, INOTIFY_BUF_LEN); + if (ret < 0) + _dbus_verbose ("Error reading inotify event: '%s'\n, _dbus_strerror(errno)"); + else if (!ret) + _dbus_verbose ("Error reading inotify event: buffer too small\n"); - if (res > 0) + while (i < ret) { - pid = getpid (); + struct inotify_event *ev; + pid = _dbus_getpid (); + + ev = (struct inotify_event *) &buffer[i]; + i += INOTIFY_EVENT_SIZE + ev->len; +#ifdef DBUS_ENABLE_VERBOSE_MODE + if (ev->len) + _dbus_verbose ("event name: '%s'\n", ev->name); + _dbus_verbose ("inotify event: wd=%d mask=%u cookie=%u len=%u\n", ev->wd, ev->mask, ev->cookie, ev->len); +#endif _dbus_verbose ("Sending SIGHUP signal on reception of a inotify event\n"); (void) kill (pid, SIGHUP); } - else if (res < 0 && errno == EBADF) + + if (watch != NULL) { - if (watch != NULL) - { - _dbus_loop_remove_watch (loop, watch, _inotify_watch_callback, NULL); - _dbus_watch_unref (watch); - watch = NULL; - } - pid = getpid (); - _dbus_verbose ("Sending SIGHUP signal since inotify fd has been closed\n"); - (void) kill (pid, SIGHUP); + _dbus_loop_remove_watch (loop, watch, _inotify_watch_callback, NULL); + _dbus_watch_unref (watch); + watch = NULL; } - + return TRUE; } + void bus_watch_directory (const char *dir, BusContext *context) { @@ -116,14 +128,13 @@ bus_watch_directory (const char *dir, BusContext *context) } } - if (num_wds >= MAX_DIRS_TO_WATCH ) { _dbus_warn ("Cannot watch config directory '%s'. Already watching %d directories\n", dir, MAX_DIRS_TO_WATCH); goto out; } - wd = inotify_add_watch (inotify_fd, dir, IN_MODIFY); + wd = inotify_add_watch (inotify_fd, dir, IN_MODIFY | IN_CREATE | IN_DELETE); if (wd < 0) { _dbus_warn ("Cannot setup inotify for '%s'; error '%s'\n", dir, _dbus_strerror (errno)); @@ -140,17 +151,13 @@ bus_watch_directory (const char *dir, BusContext *context) void bus_drop_all_directory_watches (void) { - int i; - + int ret; + _dbus_verbose ("Dropping all watches on config directories\n"); - - for (i = 0; i < num_wds; i++) - { - if (inotify_rm_watch(inotify_fd, wds[i]) != 0) - { - _dbus_verbose ("Error closing fd %d for config directory watch\n", wds[i]); - } - } - + ret = close (inotify_fd); + if (ret) + _dbus_verbose ("Error dropping watches: '%s'\n", perror(ret)); + num_wds = 0; + inotify_fd = -1; } |