Example:

when defined(linux):
  let inoty: FileHandle = inotify_init()           ## Create 1 Inotify.
  doAssert inoty >= 0                              ## Check for errors (FileHandle is alias to cint).
  let watchdoge: cint = inotify_add_watch(inoty, ".", IN_ALL_EVENTS) ## Add directory to watchdog.
  doAssert watchdoge >= 0                          ## Check for errors.
  doAssert inotify_rm_watch(inoty, watchdoge) >= 0 ## Remove directory from the watchdog

Types

InotifyEvent {...}{.pure, final, importc: "struct inotify_event", header: "<sys/inotify.h>".} = object wd* {...}{.importc: "wd".}: FileHandle ## Watch descriptor. mask* {...}{.importc: "mask".}: uint32 ## Watch mask. cookie* {...}{.importc: "cookie".}: uint32 ## Cookie to synchronize two events. len* {...}{.importc: "len".}: uint32 ## Length (including NULs) of name. name* {...}{.importc: "name".}: char ## Name.: An Inotify event. Source Edit

Consts

IN_ACCESS = 0x00000001: File was accessed. Source Edit
IN_MODIFY = 0x00000002: File was modified. Source Edit
IN_ATTRIB = 0x00000004: Metadata changed. Source Edit
IN_CLOSE_WRITE = 0x00000008: Writtable file was closed. Source Edit
IN_CLOSE_NOWRITE = 0x00000010: Unwrittable file closed. Source Edit
IN_CLOSE = 24: Close. Source Edit
IN_OPEN = 0x00000020: File was opened. Source Edit
IN_MOVED_FROM = 0x00000040: File was moved from X. Source Edit
IN_MOVED_TO = 0x00000080: File was moved to Y. Source Edit
IN_MOVE = 192: Moves. Source Edit
IN_CREATE = 0x00000100: Subfile was created. Source Edit
IN_DELETE = 0x00000200: Subfile was deleted. Source Edit
IN_DELETE_SELF = 0x00000400: Self was deleted. Source Edit
IN_MOVE_SELF = 0x00000800: Self was moved. Source Edit
IN_UNMOUNT = 0x00002000: Backing fs was unmounted. Source Edit
IN_Q_OVERFLOW = 0x00004000: Event queued overflowed. Source Edit
IN_IGNORED = 0x00008000: File was ignored. Source Edit
IN_ONLYDIR = 0x01000000: Only watch the path if it is a directory. Source Edit
IN_DONT_FOLLOW = 0x02000000: Do not follow a sym link. Source Edit
IN_EXCL_UNLINK = 0x04000000: Exclude events on unlinked objects. Source Edit
IN_MASK_ADD = 0x20000000: Add to the mask of an already existing watch. Source Edit
IN_ISDIR = 0x40000000: Event occurred against dir. Source Edit
IN_ONESHOT = 0x0000000080000000'i64: Only send event once. Source Edit
IN_ALL_EVENTS = 4095: Source Edit

Procs

proc inotify_init(): FileHandle {...}{.cdecl, importc: "inotify_init", header: "<sys/inotify.h>".}: Create and initialize inotify instance. Source Edit
proc inotify_init1(flags: cint): FileHandle {...}{.cdecl, importc: "inotify_init1", header: "<sys/inotify.h>".}: Create and initialize inotify instance. Source Edit
proc inotify_add_watch(fd: cint; name: cstring; mask: uint32): cint {...}{.cdecl, importc: "inotify_add_watch", header: "<sys/inotify.h>".}: Add watch of object NAME to inotify instance FD. Notify about events specified by MASK. Source Edit
proc inotify_rm_watch(fd: cint; wd: cint): cint {...}{.cdecl, importc: "inotify_rm_watch", header: "<sys/inotify.h>".}: Remove the watch specified by WD from the inotify instance FD. Source Edit

Iterators

iterator inotify_events(evs: pointer; n: int): ptr InotifyEvent {...}{.raises: [], tags: [].}

Abstract the packed buffer interface to yield event object pointers.

var evs = newSeq[byte](8192)        # Already did inotify_init+add_watch
while (let n = read(fd, evs[0].addr, 8192); n) > 0:     # read forever
  for e in inotify_events(evs[0].addr, n): echo e[].len # echo name lens

Source Edit