thodg/cl-unix-cybernetics/shell/sb-shell.lisp

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• Hash : b0ab5bb5
  Author : Thomas de Grivel
  Date : 2022-12-04T18:50:53
  

  cl-unix-cybernetics

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• shell/sb-shell.lisp

• ;; cl-unix-cybernetics
  ;; Copyright 2013-2022 Thomas de Grivel <thodg@kmx.io>
  ;;
  ;; Permission is hereby granted to use this software granted
  ;; the above copyright notice and this permission paragraph
  ;; are included in all copies and substantial portions of this
  ;; software.
  ;;
  ;; THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
  ;; PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
  ;; AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
  ;; THIS SOFTWARE.
  
  (in-package :cl-unix-cybernetics)
  
  ;;  SBCL implementation
  
  (defclass sb-shell (shell)
    ((process :type sb-impl::process
  	    :initarg :process
  	    :reader shell-process)
     (command :type string
  	    :initarg command
  	    :reader shell-command)))
  
  ;;  Shell infos
  
  (defmethod shell-close ((shell sb-shell))
    (format t "~&Closing shell : ~A~%" shell)
    (force-output)
    (sb-ext:process-kill (shell-process shell) sb-unix:sigterm)
    (sb-ext:process-close (shell-process shell)))
  
  (defmethod shell-closed-p ((shell sb-shell))
    (not (eq :running (sb-ext:process-status (shell-process shell)))))
  
  (defmethod shell-pid ((shell sb-shell))
    (sb-ext:process-pid (shell-process shell)))
  
  (defmethod print-object ((shell sb-shell) stream)
    (print-unreadable-object (shell stream :type t)
      (format stream "~D ~S" (shell-pid shell) (shell-command shell))))
  
  (defun make-shell (&optional (command *default-shell-command*) &rest args)
    (format t "~&Opening shell : ~A~{ ~A~}~%" command args)
    (force-output)
    (let ((process (sb-ext:run-program command args
  				     :wait nil :search nil
  				     :input :stream
  				     :output :stream
  				     :error :stream)))
      (unwind-protect
  	 (let ((shell (make-instance 'sb-shell
  				     :process process
  				     :command (format nil "~A~{ ~A~}"
  						      command args))))
  	   (shell-in "true" shell)
  	   (shell-status shell)
  	   (setq process nil)
  	   shell)
        (when process
  	(sb-ext:process-kill process sb-unix:sigterm)
  	(sb-ext:process-close process)))))
  
  (defmethod shell-in ((data string)
  		     (shell sb-shell))
    (let ((in (sb-ext:process-input (shell-process shell))))
      (write-string data in)
      (finish-output in)
      (when (debug-p :sb-shell)
        (debug-out "~A" data))
      shell))
  
  (defmethod shell-out/line ((shell sb-shell))
    (let ((out (read-line (sb-ext:process-output (shell-process shell)) nil nil)))
      (when (and out (debug-p :sb-shell))
        (debug-out "~A~%" out))
      out))
  
  (defmethod shell-err ((shell sb-shell))
   (let ((err (read-string (sb-ext:process-error (shell-process shell)))))
     (when (debug-p (or :sb-shell))
       (debug-out "~A" err))
     err))
  
  (defmethod shell-err/line ((shell sb-shell))
    (cl-ppcre:split #.(make-string 1 :initial-element #\Newline)
  		  (shell-err shell)))
  

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