我想监视对目录/文件的更改。如果我想监视只说5个事件 使用以下面具
IN_OPEN
IN_CREATE
IN_DELETE
IN_CLOSE_WRITE
例如,
我是否必须在每个面具上调用inotify_add_watch()
,或者是否有办法将面具聚集在一起,以便inotify_add_watch
被调用一次?
答案 0 :(得分:3)
他们可以在inotify_add_watch()
的一次通话中'或',即:
wd = inotify_add_watch(fd, path, IN_CREATE|IN_DELETE);
任何位组合可以在以下限制内“或”:
/* the following are legal, implemented events that user-space can watch for */
#define IN_ACCESS 0x00000001 /* File was accessed */
#define IN_MODIFY 0x00000002 /* File was modified */
#define IN_ATTRIB 0x00000004 /* Metadata changed */
#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */
#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
#define IN_OPEN 0x00000020 /* File was opened */
#define IN_MOVED_FROM 0x00000040 /* File was moved from X */
#define IN_MOVED_TO 0x00000080 /* File was moved to Y */
#define IN_CREATE 0x00000100 /* Subfile was created */
#define IN_DELETE 0x00000200 /* Subfile was deleted */
#define IN_DELETE_SELF 0x00000400 /* Self was deleted */
/* the following are legal events. they are sent as needed to any watch */
#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */
#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
#define IN_IGNORED 0x00008000 /* File was ignored */
/* helper events */
#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */
#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */
/* special flags */
#define IN_ISDIR 0x40000000 /* event occurred against dir */
#define IN_ONESHOT 0x80000000 /* only send event once */
/*
* All of the events - we build the list by hand so that we can add flags in
* the future and not break backward compatibility. Apps will get only the
* events that they originally wanted. Be sure to add new events here!
*/
#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF)
(以上是来自inotify.h)
答案 1 :(得分:1)
您可以使用" OR"结合面具的操作:
wd = inotify_add_watch( fd, "<path of dir>", IN_CREATE | IN_DELETE );
否则,如果您想使用所有面具,请使用
wfd = inotify_add_watch(ifd,"<path of dir>",IN_ALL_EVENTS);
这是所有面具的组合。