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Chapter 19. Monitoring File Events > inotify Events
19.3. inotify Events
When we create or modify a watch using inotify_add_watch(), the mask bit-mask argument identifies the events to be monitored for the given pathname. The event bits that may be specified in mask are indicated by the In column of Table 19-1.
| Bit value | In | Out | Description |
|---|---|---|---|
| IN_ACCESS | • | • | File was accessed (read()) |
| IN_ATTRIB | • | • | File metadata changed |
| IN_CLOSE_WRITE | • | • | File opened for writing was closed |
| IN_CLOSE_NOWRITE | • | • | File opened read-only was closed |
| IN_CREATE | • | • | File/directory created inside watched directory |
| IN_DELETE | • | • | File/directory deleted from within watched directory |
| IN_DELETE_SELF | • | • | Watched file/directory was itself deleted |
| IN_MODIFY | • | • | File was modified |
| IN_MOVE_SELF | • | • | Watched file/directory was itself moved |
| IN_MOVED_FROM | • | • | File moved out of watched directory |
| IN_MOVED_TO | • | • | File moved into watched directory |
| IN_OPEN | • | • | File was opened |
| IN_ALL_EVENTS | • | Shorthand for all of the above input events | |
| IN_MOVE | • | Shorthand for IN_MOVED_FROM | IN_MOVED_TO | |
| IN_CLOSE | • | Shorthand for IN_CLOSE_WRITE | IN_CLOSE_NOWRITE | |
| IN_DONT_FOLLOW | • | Don’t dereference symbolic link (since Linux 2.6.15) | |
| IN_MASK_ADD | • | Add events to current watch mask for pathname | |
| IN_ONESHOT | • | Monitor pathname for just one event | |
| IN_ONLYDIR | • | Fail if pathname is not a directory (since Linux 2.6.15) | |
| IN_IGNORED | • | Watch was removed by application or by kernel | |
| IN_ISDIR | • | Filename returned in name is a directory | |
| IN_Q_OVERFLOW | • | Overflow on event queue | |
| IN_UNMOUNT | • | File system containing object was unmounted |
