scsh-0.5/scsh/generic/fdflags.scm

;;; Flags for open(2) and fcntl(2).
;;; Copyright (c) 1993 by Olin Shivers.

(define-enum-constants open
  (read			0)
  (write		1)
  (read+write		2)
  (append		8)
  (create		#x0200)
  (exclusive		#x0800)
  (no-control-tty	#x8000)
  (nonblocking		#x4000)
  (truncate		#x0400)

;;; Not POSIX.
  (no-delay	4)
  (sync		#x2000))

(define open/access-mask
  (bitwise-ior open/read
	       (bitwise-ior open/write open/read+write)))

;;; fcntl() commands
(define-enum-constants fcntl
  (dup-fdes			0)	; F_DUPFD
  (get-fdes-flags		1)	; F_GETFD
  (set-fdes-flags		2)	; F_SETFD
  (get-status-flags		3)	; F_GETFL
  (set-status-flags		4)	; F_SETFL
  (get-record-lock		5)	; F_GETLK
  (set-record-lock-noblock	6)	; F_SETLK
  (set-record-lock		7))	; F_SETLKW

;;; fcntl fdes-flags (F_GETFD)

(define fdflags/close-on-exec 		1)

;;; fcntl status-flags (F_GETFL)
;;; Mostly, these are OPEN/... flags, like OPEN/APPEND.
;;; (define fdstatus/... ...)

;;; fcntl lock values.

(define-enum-constants lock
  (read		1)	; F_RDLCK
  (write	2)	; F_WRLCK
  (release	3))	; F_UNLCK