89 lines
2.8 KiB
Scheme
89 lines
2.8 KiB
Scheme
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;;; This file is part of the Scheme Untergrund Library.
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;;; Copyright (c) 2002-2003 by Martin Gasbichler.
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;;; For copyright information, see the file COPYING which comes with
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;;; the distribution.
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(define (bind-listen-accept protocol-family proc arg)
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(let* ((sock (create-socket protocol-family socket-type/stream))
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(addr (cond ((= protocol-family
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protocol-family/internet)
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(let ((port (cond ((integer? arg) arg)
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((string? arg)
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(service-info:port
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(service-info arg "tcp")))
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(else
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(error "socket-connect: bad arg ~s"
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arg)))))
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(internet-address->socket-address internet-address/any
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arg)))
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((= protocol-family
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protocol-family/unix)
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(unix-address->socket-address arg))
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(else
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(error "bind-listen-accept: unsupported protocol-family ~s"
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protocol-family)))))
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(set-socket-option sock level/socket socket/reuse-address #t)
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(bind-socket sock addr)
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(listen-socket sock 5)
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(with-handler
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(lambda (condition more)
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(with-handler
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(lambda (condition ignore) (more))
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(lambda () (close-socket sock)))
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(more))
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(lambda ()
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(with-errno-handler
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;; ECONNABORTED we just ignore
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((errno packet)
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((errno/connaborted) 'fick-dich-ins-knie))
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(call-with-values
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(lambda () (accept-connection sock))
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proc))))))
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(define (remote-repl greeting focus-value port)
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(let ((old-output (command-output))
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(old-input (command-input))
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(old-err (command-error-output)))
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(bind-listen-accept
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protocol-family/internet
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(lambda (socket address)
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(set-port-buffering (socket:outport socket) bufpol/none)
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(set-port-buffering (socket:inport socket) bufpol/none)
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(set-socket-option socket level/socket socket/oob-inline #t)
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(set-socket-option socket level/socket socket/reuse-address #t)
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(let ((res (script-repl greeting
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focus-value
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(socket:inport socket)
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(socket:outport socket)
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(socket:outport socket))))
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(with-handler
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(lambda (condition ignore) 'fick-dich-ins-knie)
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(lambda () (close-socket socket)))
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res))
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port)))
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(define (script-repl greeting focus-value iport oport eport)
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(with-interaction-environment
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(environment-for-commands)
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(lambda ()
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(let* ((saved-user-context (user-context))
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(res
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(restart-command-processor
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'ignored-focus-value
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(user-context)
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(lambda ()
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;; we need to redirect the ports of the command processor
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(start-new-session saved-user-context
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iport
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oport
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eport
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focus-value
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#f) ;batch?
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(display greeting (command-output))
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(newline (command-output))
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(display (focus-object) (command-output))
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(newline (command-output))))))
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(format (command-output) "Terminating command processor with value ~A ~%" res)
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res))))
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