121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "uv.h"
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#include "internal.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include <sys/event.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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static void uv__fs_event(EV_P_ ev_io* w, int revents);
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static void uv__fs_event_start(uv_fs_event_t* handle) {
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ev_io_init(&handle->event_watcher,
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uv__fs_event,
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handle->fd,
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EV_LIBUV_KQUEUE_HACK);
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ev_io_start(handle->loop->ev, &handle->event_watcher);
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}
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static void uv__fs_event_stop(uv_fs_event_t* handle) {
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ev_io_stop(handle->loop->ev, &handle->event_watcher);
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}
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static void uv__fs_event(EV_P_ ev_io* w, int revents) {
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uv_fs_event_t* handle;
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int events;
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assert(revents == EV_LIBUV_KQUEUE_HACK);
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handle = container_of(w, uv_fs_event_t, event_watcher);
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if (handle->fflags & (NOTE_ATTRIB | NOTE_EXTEND))
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events = UV_CHANGE;
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else
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events = UV_RENAME;
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handle->cb(handle, NULL, events, 0);
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if (handle->fd == -1)
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return;
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/* File watcher operates in one-shot mode, re-arm it. */
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uv__fs_event_stop(handle);
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uv__fs_event_start(handle);
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}
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/* Called by libev, don't touch. */
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void uv__kqueue_hack(EV_P_ int fflags, ev_io *w) {
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uv_fs_event_t* handle;
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handle = container_of(w, uv_fs_event_t, event_watcher);
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handle->fflags = fflags;
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}
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int uv_fs_event_init(uv_loop_t* loop,
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uv_fs_event_t* handle,
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const char* filename,
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uv_fs_event_cb cb,
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int flags) {
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int fd;
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/* We don't support any flags yet. */
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assert(!flags);
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/* TODO open asynchronously - but how do we report back errors? */
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if ((fd = open(filename, O_RDONLY)) == -1) {
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uv__set_sys_error(loop, errno);
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return -1;
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}
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uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT);
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uv__handle_start(handle); /* FIXME shouldn't start automatically */
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handle->filename = strdup(filename);
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handle->fflags = 0;
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handle->cb = cb;
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handle->fd = fd;
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uv__fs_event_start(handle);
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return 0;
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}
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void uv__fs_event_close(uv_fs_event_t* handle) {
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uv__fs_event_stop(handle);
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uv__handle_stop(handle);
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free(handle->filename);
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close(handle->fd);
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handle->fd = -1;
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}
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