326 lines
12 KiB
Scheme
326 lines
12 KiB
Scheme
;;; My comments:
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;;; - We have a lot of NeXT-specific stuff. More importantly, what is the
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;;; Linux, Solaris, and HP-UX specific stuff?
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;;;
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;;; - I would suggest totally flushing the ttychars vector from the interface
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;;; in favor of individual slots in the TTY-INFO record. Keep the vec
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;;; in the implementation, and define the TTY-INFO:EOL, etc. procs by
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;;; hand as being indices into the vector. We could *also* expose the
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;;; vector if we liked.
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;;; -Olin
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;;; Terminal Control for the Scheme Shell
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;;; Copyright (c) 1995 by Brian D. Carlstrom.
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;;; Rehacked by Olin 8/95.
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;;; tty-info records
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; I have to fake out my record package so I can define my very own
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;;; MAKE-TTY-INFO procedure. Ech. I oughta have a lower-level record macro
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;;; for this kind of thing.
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(define-record %tty-info
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control-chars
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input-flags
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output-flags
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control-flags
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local-flags
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input-speed
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input-speed-code
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output-speed
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output-speed-code
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min
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time
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((disclose info) '("tty-info")))
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(define tty-info? %tty-info?)
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(define type/tty-info type/%tty-info)
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(define tty-info:control-chars %tty-info:control-chars)
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(define tty-info:input-flags %tty-info:input-flags)
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(define tty-info:output-flags %tty-info:output-flags)
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(define tty-info:control-flags %tty-info:control-flags)
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(define tty-info:local-flags %tty-info:local-flags)
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(define tty-info:input-speed %tty-info:input-speed)
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(define tty-info:output-speed %tty-info:output-speed)
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(define tty-info:min %tty-info:min)
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(define tty-info:time %tty-info:time)
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(define set-tty-info:control-chars set-%tty-info:control-chars)
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(define set-tty-info:input-flags set-%tty-info:input-flags)
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(define set-tty-info:output-flags set-%tty-info:output-flags)
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(define set-tty-info:control-flags set-%tty-info:control-flags)
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(define set-tty-info:local-flags set-%tty-info:local-flags)
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(define set-tty-info:min set-%tty-info:min)
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(define set-tty-info:time set-%tty-info:time)
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(define modify-tty-info:control-chars modify-%tty-info:control-chars)
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(define modify-tty-info:input-flags modify-%tty-info:input-flags)
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(define modify-tty-info:output-flags modify-%tty-info:output-flags)
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(define modify-tty-info:control-flags modify-%tty-info:control-flags)
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(define modify-tty-info:local-flags modify-%tty-info:local-flags)
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(define modify-tty-info:min modify-%tty-info:min)
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(define modify-tty-info:time modify-%tty-info:time)
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;;; Encode the speeds at assignment time.
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(define (set-tty-info:input-speed info speed)
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(set-%tty-info:input-speed-code info (encode-baud-rate speed))
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(set-%tty-info:input-speed info speed))
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(define (set-tty-info:output-speed info speed)
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(set-%tty-info:output-speed-code info (encode-baud-rate speed))
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(set-%tty-info:output-speed info speed))
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(define (modify-tty-info:input-speed info proc)
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(set-tty-info:input-speed info (proc (tty-info:input-speed info))))
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(define (modify-tty-info:output-speed info proc)
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(set-tty-info:output-speed info (proc (tty-info:output-speed info))))
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(define (make-tty-info iflags oflags cflags lflags ispeed ospeed min time)
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(make-%tty-info (make-string num-ttychars (ascii->char 0))
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iflags oflags cflags lflags
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ispeed (encode-baud-rate ispeed)
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ospeed (encode-baud-rate ospeed)
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min time))
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(define (copy-tty-info info)
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(make-%tty-info (string-copy (tty-info:control-chars info))
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(tty-info:input-flags info)
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(tty-info:output-flags info)
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(tty-info:control-flags info)
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(tty-info:local-flags info)
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(tty-info:input-speed info)
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(%tty-info:input-speed-code info)
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(tty-info:output-speed info)
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(%tty-info:output-speed-code info)
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(tty-info:min info)
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(tty-info:time info)))
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(define (sleazy-call/file tty opener proc)
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(if (string? tty) (opener tty proc)
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(sleazy-call/fdes tty proc)))
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;;; (tty-info [fd/port/fname])
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Retrieve tty-info bits from a tty. Arg defaults to current input port.
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(define (tty-info . maybe-fdport)
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(let ((control-chars (make-string num-ttychars))
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(fdport (:optional maybe-fdport (current-input-port))))
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(apply
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(lambda (iflag oflag cflag lflag ispeed-code ospeed-code)
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(make-%tty-info control-chars
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iflag
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oflag
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cflag
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lflag
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(decode-baud-rate ispeed-code) ispeed-code
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(decode-baud-rate ospeed-code) ospeed-code
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(char->ascii (string-ref control-chars ttychar/min))
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(char->ascii (string-ref control-chars ttychar/time))))
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(sleazy-call/fdes fdport (lambda (fd) (%tty-info fd control-chars))))))
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(import-os-error-syscall %tty-info (fdes control-chars)
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"scheme_tcgetattr")
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;;; JMG: I don't know what the purpose of this code is...
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;(define-foreign %bogus-tty-info/errno
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; ("scheme_tcgetattrB" (fixnum fdes)
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; (var-string control-chars)
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; (vector-desc ivec))
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; (to-scheme fixnum errno_or_false))
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;(define-errno-syscall (%bogus-tty-info fdes control-chars ivec)
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; %bogus-tty-info/errno)
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;(define (%%bogus-tty-info fd control-chars)
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; (let ((ivec (make-vector 6)))
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; (%bogus-tty-info fd control-chars ivec)
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; ivec))
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;(define (%tty-info fdes cc)
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; (let ((ivec (%%bogus-tty-info fdes cc)))
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; (values (vector-ref ivec 0) (vector-ref ivec 1)
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; (vector-ref ivec 2) (vector-ref ivec 3)
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; (vector-ref ivec 4) (vector-ref ivec 5)
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; (vector-ref ivec 6) (vector-ref ivec 7)
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; (vector-ref ivec 8) (vector-ref ivec 9)
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; cc)))
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;;; (set-tty-info tty option info) [Not exported]
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;;; (set-tty-info/now tty option info)
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;;; (set-tty-info/drain tty option info)
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;;; (set-tty-info/flush tty option info)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Assign tty-info bits to a tty.
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(define (set-tty-info fdport option info)
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(let ((if (tty-info:input-flags info))
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(of (tty-info:output-flags info))
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(cf (tty-info:control-flags info))
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(lf (tty-info:local-flags info))
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(cc (tty-info:control-chars info))
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(is (%tty-info:input-speed-code info))
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(os (%tty-info:output-speed-code info)))
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(sleazy-call/fdes
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fdport
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(lambda (fd)
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(%set-tty-info fd option
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cc
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if
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of
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cf
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lf
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is os
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(tty-info:min info)
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(tty-info:time info))))))
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(import-os-error-syscall %set-tty-info
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(fdes option control-chars iflag oflag cflag lflag ispeed-code ospeed-code
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min time)
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"scheme_tcsetattr")
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;;; Exported procs
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Note that the magic %set-tty-info/foo constants must be defined before this
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;;; file is loaded due to the set-tty-info/foo definitions below.
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(define (make-tty-info-setter how)
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(lambda (fdport info) (set-tty-info fdport how info)))
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(define set-tty-info/now (make-tty-info-setter %set-tty-info/now))
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(define set-tty-info/drain (make-tty-info-setter %set-tty-info/drain))
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(define set-tty-info/flush (make-tty-info-setter %set-tty-info/flush))
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;;; Send a break on the serial line.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define (send-tty-break fdport . maybe-duration)
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(sleazy-call/fdes fdport
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(lambda (fdes)
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(%send-tty-break-fdes fdes (:optional maybe-duration 0)))))
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(import-os-error-syscall %send-tty-break-fdes (fdes duration)
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"sch_tcsendbreak")
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;;; Drain the main vein.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define (drain-tty fdport)
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(cond ((integer? fdport) (%tcdrain fdport)) ; File descriptor.
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((fdport? fdport) ; Scheme port -- flush first.
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(force-output fdport)
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(sleazy-call/fdes fdport %tcdrain))
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(else (error "Illegal argument to DRAIN-TTY" fdport))))
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(import-os-error-syscall %tcdrain (fdes) "sch_tcdrain")
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;;; Flushing the device queues. (tcflush)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Note that the magic %flush-tty/foo constants must be defined before this
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;;; file is loaded due to the flush-tty/foo definitions below.
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(define (make-tty-flusher flag)
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(lambda (fdport)
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(sleazy-call/fdes fdport (lambda (fdes) (%tcflush fdes flag)))))
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(define flush-tty/input (make-tty-flusher %flush-tty/input))
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(define flush-tty/output (make-tty-flusher %flush-tty/output))
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(define flush-tty/both (make-tty-flusher %flush-tty/both))
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(import-os-error-syscall %tcflush (fdes flag) "sch_tcflush")
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;;; Stopping and starting I/O (tcflow)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Note that the magic %tcflow/foo constants must be defined before this
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;;; file is loaded due to the definitions below.
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(define (make-flow-controller action)
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(lambda (fdport)
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(sleazy-call/fdes fdport (lambda (fdes) (%tcflow fdes action)))))
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(define start-tty-output (make-flow-controller %tcflow/start-out))
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(define stop-tty-output (make-flow-controller %tcflow/stop-out))
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(define start-tty-input (make-flow-controller %tcflow/start-in))
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(define stop-tty-input (make-flow-controller %tcflow/stop-in))
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(import-os-error-syscall %tcflow (fdes action) "sch_tcflow")
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;;; Baud rate translation
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; We should just move these guys out to the tty-consts file.
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;;; We currently search a vector of (code . speed) pairs.
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(define (encode-baud-rate speed) ; 9600 -> value of BAUD/9600
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(do ((i (- (vector-length baud-rates) 1) (- i 1)))
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((eqv? (cdr (vector-ref baud-rates i)) speed)
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(car (vector-ref baud-rates i)))
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(if (< i 0) (error "Unknown baud rate." speed))))
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(define (decode-baud-rate code) ; BAUD/9600 -> 9600
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(do ((i (- (vector-length baud-rates) 1) (- i 1)))
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((eqv? (car (vector-ref baud-rates i)) code)
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(cdr (vector-ref baud-rates i)))
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(if (< i 0) (error "Unknown baud rate code." code))))
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;;; Set/Get tty process group
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define (set-tty-process-group port/fd proc-group)
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(sleazy-call/fdes port/fd
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(lambda (fd)
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(%set-tty-process-group fd (if (integer? proc-group)
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proc-group
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(proc:pid proc-group))))))
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(import-os-error-syscall %set-tty-process-group (fdes pid) "sch_tcsetpgrp")
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(define (tty-process-group port/fd)
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(sleazy-call/fdes port/fd %tty-process-group))
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(import-os-error-syscall %tty-process-group (fdes) "sch_tcgetpgrp")
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;;; (open-control-tty fname [flags])
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Open a control tty, return a port.
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;;; This procedure is only guaranteed to work when the process doesn't already
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;;; have a control tty -- e.g., right after a (BECOME-PROCESS-LEADER) call.
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;;; This limted functionality is about all we can provide portably across BSD,
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;;; SunOS, and SVR4.
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(define (open-control-tty ttyname . maybe-flags)
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(let ((flags (:optional maybe-flags open/read+write)))
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(let ((fd (%open-control-tty ttyname flags))
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(access (bitwise-and flags open/access-mask)))
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((if (or (= access open/read)
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(= access open/read+write))
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make-input-fdport
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make-output-fdport)
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fd 1))))
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(import-os-error-syscall %open-control-tty (ttyname flags) "open_ctty")
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;;; Random bits & pieces: isatty ttyname ctermid
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; (tty? fd/port) -> boolean
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;;; (tty-file-name fd/port) -> string
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;;; (control-tty-file-name) -> string
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(import-os-error-syscall %tty? (fd) "sch_isatty")
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(define (tty? fd/port) (sleazy-call/fdes fd/port %tty?))
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(import-os-error-syscall %tty-file-name (fd) "sch_ttyname")
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(define (tty-file-name fd/port) (sleazy-call/fdes fd/port %tty-file-name))
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(import-os-error-syscall control-tty-file-name () "scm_ctermid")
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