/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Inode based directory notification for Linux * * Copyright (C) 2005 John McCutchan */ #ifndef _LINUX_INOTIFY_H #define _LINUX_INOTIFY_H /* For O_CLOEXEC and O_NONBLOCK */ #include <linux/fcntl.h> #include <linux/types.h> /* * struct inotify_event - structure read from the inotify device for each event * * When you are watching a directory, you will receive the filename for events * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd. */ struct inotify_event { __s32 wd; /* watch descriptor */ __u32 mask; /* watch mask */ __u32 cookie; /* cookie to synchronize two events */ __u32 len; /* length (including nulls) of name */ char name[0]; /* stub for possible name */ }; /* 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 */ #define IN_MOVE_SELF 0x00000800 /* Self was moved */ /* 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_ONLYDIR 0x01000000 /* only watch the path if it is a directory */ #define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */ #define IN_EXCL_UNLINK 0x04000000 /* exclude events on unlinked objects */ #define IN_MASK_CREATE 0x10000000 /* only create watches */ #define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */ #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 | \ IN_MOVE_SELF) /* Flags for sys_inotify_init1. */ #define IN_CLOEXEC O_CLOEXEC #define IN_NONBLOCK O_NONBLOCK /* * ioctl numbers: inotify uses 'I' prefix for all ioctls, * except historical FIONREAD, which is based on 'T'. * * INOTIFY_IOC_SETNEXTWD: set desired number of next created * watch descriptor. */ #define INOTIFY_IOC_SETNEXTWD _IOW('I', 0, __s32) #endif /* _LINUX_INOTIFY_H */