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Linux Cubed Series 7: Sunsite
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Linux Cubed Series 7 - Sunsite Vol 1.iso
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fdflags.scm
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1995-10-13
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1KB
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44 lines
;;; Flags for open(2) and fcntl(2).
;;; Copyright (c) 1993 by Olin Shivers.
(define-syntax define-open-flags
(syntax-rules ()
((define-opens form ...)
(begin (define-enum-constant "open" . form) ...))))
(define-open-flags
;; POSIX
(read 0)
(write 1)
(read+write 2)
(nonblocking #o200000)
(append #o10)
(no-control-tty #o400000)
(create #o0400)
(truncate #o1000)
(exclusive #o2000)
;; NextStep
(sync #o100000)) ; Synchronous writes
(define open/access-mask
(bitwise-ior open/read
(bitwise-ior open/write open/read+write)))
;;; These are internal; they are not part of the supported scsh interface.
(define fcntl/close-on-exec 1)
(define fcntl/dupfd 0)
(define fcntl/get-fd-flags 1)
(define fcntl/set-fd-flags 2)
(define fcntl/get-file-flags 3)
(define fcntl/set-file-flags 4)
(define fcntl/get-record-lock 5) ; F_GETLK
(define fcntl/set-record-lock-noblock 6) ; F_SETLK
(define fcntl/set-record-lock 7) ; F_SETLKW
(define lock/read 1) ; F_RDLCK
(define lock/write 2) ; F_WRLCK
(define lock/release 3) ' F_UNLCK