mirror of
https://github.com/octoleo/lsyncd.git
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This commit is contained in:
Axel Kittenberger
parent
42e8f69b05
commit
e575ab8d76
86
lsyncd.c
86
lsyncd.c
@ -54,12 +54,18 @@
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* Event types core sends to runner.
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*/
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enum event_type {
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NONE = 0,
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ATTRIB = 1,
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MODIFY = 2,
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CREATE = 3,
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DELETE = 4,
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MOVE = 5,
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NONE = 0,
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ATTRIB = 1,
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MODIFY = 2,
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CREATE = 3,
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DELETE = 4,
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MOVE = 5,
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/* MOVEFROM/TO never get passed to the runner, but it uses these
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* enums to split events again. The core will only send complete
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* move events to the runner. Moves into or out of the watch tree
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* are replaced with CREATE/DELETE events. */
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MOVEFROM = 6,
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MOVETO = 7,
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};
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/**
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@ -714,36 +720,42 @@ void handle_event(lua_State *L, struct inotify_event *event) {
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}
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if (event == NULL) {
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/* a buffered MOVE_FROM is not followed by anything, thus it is unary */
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/* a buffered MOVE_FROM is not followed by anything,
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thus it is unary */
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event = move_event_buf;
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event_type = DELETE;
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move_event = false;
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} else if (move_event && (!(IN_MOVED_TO & event->mask)|| event->cookie != move_event_buf->cookie)) {
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/* there is a MOVE_FROM event in the buffer and this is not the match */
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/* continue in this function iteration to handler the buffer instead */
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} else if (move_event &&
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( !(IN_MOVED_TO & event->mask) ||
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event->cookie != move_event_buf->cookie) ) {
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/* there is a MOVE_FROM event in the buffer and this is not the match
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* continue in this function iteration to handler the buffer instead */
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after_buf = event;
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event = move_event_buf;
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event_type = DELETE;
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move_event = false;
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} else if (move_event && (IN_MOVED_TO & event->mask) && event->cookie == move_event_buf->cookie) {
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} else if ( move_event &&
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(IN_MOVED_TO & event->mask) &&
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event->cookie == move_event_buf->cookie ) {
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/* this is indeed a matched move */
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event_type = MOVE;
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move_event = false;
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} else if (IN_MOVED_FROM & event->mask) {
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/* just the MOVE_FROM, buffers this event, and wait if next event is a matching
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* MOVED_TO of this was an unary move out of the watched tree. */
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if (move_event_buf_size < sizeof(struct inotify_event) + event->len) {
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move_event_buf_size = sizeof(struct inotify_event) + event->len;
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move_event_buf = s_realloc(move_event_buf, move_event_buf_size);
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size_t el = sizeof(struct inotify_event) + event->len;
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if (move_event_buf_size < el) {
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move_event_buf_size = el;
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move_event_buf = s_realloc(move_event_buf, el);
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}
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memcpy(move_event_buf, event, sizeof(struct inotify_event) + event->len);
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memcpy(move_event_buf, event, el);
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move_event = true;
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return;
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} else if (IN_MOVED_TO & event->mask) {
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/* must be an unary moveto */
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/* must be an unary move-to */
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event_type = CREATE;
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} else if (IN_MOVED_FROM & event->mask) {
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/* must be an unary movefrom */
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/* must be an unary move-from */
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event_type = DELETE;
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} else if (IN_ATTRIB & event->mask) {
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/* just attrib change */
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@ -762,6 +774,7 @@ void handle_event(lua_State *L, struct inotify_event *event) {
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return;
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}
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/* and hands over to runner */
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lua_getglobal(L, "lsyncd_event");
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lua_pushnumber(L, event_type);
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lua_pushnumber(L, event->wd);
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@ -775,6 +788,7 @@ void handle_event(lua_State *L, struct inotify_event *event) {
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}
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lua_call(L, 5, 0);
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/* if there is a buffered event executes it */
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if (after_buf) {
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handle_event(L, after_buf);
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}
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@ -842,32 +856,28 @@ masterloop(lua_State *L)
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}
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/* reads possible events from inotify stream */
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do {
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while(do_read) {
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int i = 0;
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if (do_read) {
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do {
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len = read (inotify_fd, readbuf, readbuf_size);
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if (len < 0 && errno == EINVAL) {
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/* kernel > 2.6.21 indicates that way that way that
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* the buffer was too small to fit a filename.
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* double its size and try again. When using a lower
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* kernel and a filename > 2KB appears lsyncd
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* will fail. (but does a 2KB filename really happen?)*/
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readbuf_size *= 2;
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readbuf = s_realloc(readbuf, readbuf_size);
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continue;
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}
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} while(0);
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} else {
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len = 0;
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}
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do {
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len = read (inotify_fd, readbuf, readbuf_size);
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if (len < 0 && errno == EINVAL) {
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/* kernel > 2.6.21 indicates that way that way that
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* the buffer was too small to fit a filename.
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* double its size and try again. When using a lower
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* kernel and a filename > 2KB appears lsyncd
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* will fail. (but does a 2KB filename really happen?)*/
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readbuf_size *= 2;
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readbuf = s_realloc(readbuf, readbuf_size);
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continue;
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}
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} while(0);
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while (i < len && !reset) {
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struct inotify_event *event = (struct inotify_event *) &readbuf[i];
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handle_event(L, event);
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i += sizeof(struct inotify_event) + event->len;
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}
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/* check if there is more data */
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if (do_read) {
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{
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struct timeval tv = {.tv_sec = 0, .tv_usec = 0};
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fd_set readfds;
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FD_ZERO(&readfds);
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@ -877,9 +887,9 @@ masterloop(lua_State *L)
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logstring(DEBUG, "there is more data on inotify.");
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}
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}
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} while (do_read);
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}
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/* checks if there is an unary MOVE_FROM in the buffer */
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/* checks if there is an unary MOVE_FROM left in the buffer */
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if (move_event) {
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handle_event(L, NULL);
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}
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30
lsyncd.lua
30
lsyncd.lua
@ -14,6 +14,7 @@
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-- A security measurement.
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-- Core will exit if version ids mismatch.
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if lsyncd_version ~= nil then
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-- checks if the runner is being loaded twice
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print("You cannot use the lsyncd runner as configuration file!")
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os.exit(-1)
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end
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@ -33,12 +34,16 @@ origins = {}
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--
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-- structure:
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-- [#] {
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-- .ident .. the identifier of target (like string "host:dir")
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-- for lsyncd this passed competly opaquely to the action handlers
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-- .delays = [#] {
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-- wd ... watch descriptor
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-- atype ... TODO
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-- }
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-- .ident .. the identifier of target (like string "host:dir")
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-- for lsyncd this passed competly opaquely to the
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-- action handlers
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-- .delays = [#) { .. the delays stack
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-- .atype .. enum, kind of action
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-- .wd .. watch descriptor id this origins from TODO needed?
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-- .attend .. link to atttender that raised this.
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-- .filename .. filename or nil, means dir itself
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-- (.movepeer) .. for MOVEFROM/MOVETO link to other delay
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-- }
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-- }
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targets = {}
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@ -59,7 +64,6 @@ targets = {}
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--
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watches = {}
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-- TODO
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collapse_table = {
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[ATTRIB] = { [ATTRIB] = ATTRIB, [MODIFY] = MODIFY, [CREATE] = CREATE, [DELETE] = DELETE },
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@ -161,11 +165,13 @@ end
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-- A list of names of the event types the core sends.
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--
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local event_names = {
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[ATTRIB] = "Attrib",
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[MODIFY] = "Modify",
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[CREATE] = "Create",
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[DELETE] = "Delete",
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[MOVE ] = "Move",
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[ATTRIB ] = "Attrib",
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[MODIFY ] = "Modify",
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[CREATE ] = "Create",
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[DELETE ] = "Delete",
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[MOVE ] = "Move",
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[MOVEFROM ] = "MoveFrom",
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[MOVETO ] = "MoveTo",
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}
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-----
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