thodg/cl-unix-cybernetics/unix/stat.lisp

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• Hash : 34f3771c
  Author :
  Date : 2014-11-03T17:33:27
  

  Refactor code into modules. Implement SPECIFY macro.

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• unix/stat.lisp

• ;;
  ;;  adams  -  Remote system administration tools
  ;;
  ;;  Copyright 2013,2014 Thomas de Grivel <thomas@lowh.net>
  ;;
  ;;  Permission to use, copy, modify, and distribute this software for any
  ;;  purpose with or without fee is hereby granted, provided that the above
  ;;  copyright notice and this permission notice appear in all copies.
  ;;
  ;;  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  ;;  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  ;;  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ;;  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  ;;  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ;;  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  ;;  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  ;;
  
  (in-package :adams)
  
  ;;  st_mode, see stat(2)
  
  (define-constant +stat-mode-types+
      '((fifo              #\p #o010000)
        (character-special #\c #o020000)
        (directory         #\d #o040000)
        (block-special     #\b #o060000)
        (file              #\- #o100000)
        (symbolic-link     #\l #o120000)
        (socket            #\s #o140000))
    :test #'equalp)
  
  (defun mode-string-type (mode-string)
    (let ((c (char mode-string 0)))
      (or (car (find c +stat-mode-types+ :key #'second :test #'char=))
  	(error "Unknown mode string type : ~S" c))))
  
  (defun mode-type (mode)
    (let ((m (logand mode #o170000)))
      (or (car (find m +stat-mode-types+ :key #'third :test #'=))
  	(error "Unknown mode type : #o~O." m))))
  
  (defun type-mode (type)
    (or (third (find type +stat-mode-types+ :key #'car :test #'eq))
        (error "Unknown type ~S." type)))
  
  (defun type-mode-char (type)
    (or (second (find type +stat-mode-types+ :key #'car :test #'eq))
        (error "Unknown type ~S." type)))
  
  (defun mode-string (mode)
    (str (type-mode-char (mode-type mode))
         (if (logtest     #o0400 mode) #\r #\-)
         (if (logtest     #o0200 mode) #\w #\-)
         (if (logtest     #o0100 mode)
  	   (if (logtest #o4000 mode) #\s #\x)
  	   (if (logtest #o4000 mode) #\S #\-))
         (if (logtest     #o0040 mode) #\r #\-)
         (if (logtest     #o0020 mode) #\w #\-)
         (if (logtest     #o0010 mode)
  	   (if (logtest #o2000 mode) #\s #\x)
  	   (if (logtest #o2000 mode) #\S #\-))
         (if (logtest     #o0004 mode) #\r #\-)
         (if (logtest     #o0002 mode) #\w #\-)
         (if (logtest     #o0001 mode)
  	   (if (logtest #o1000 mode) #\s #\x)
  	   (if (logtest #o1000 mode) #\S #\-))))
  
  (defun parse-mode-string (s)
    (declare (type (string 10) s))
    (logior
     (ecase (char s 0) (#\- 0) (#\r #o0400))
     (ecase (char s 1) (#\- 0) (#\w #o0200))
     (ecase (char s 2) (#\- 0) (#\x #o0100) (#\S #o4000) (#\s #o4100))
     (ecase (char s 3) (#\- 0) (#\r #o0040))
     (ecase (char s 4) (#\- 0) (#\w #o0020))
     (ecase (char s 5) (#\- 0) (#\x #o0010) (#\S #o2000) (#\s #o2010))
     (ecase (char s 6) (#\- 0) (#\r #o0004))
     (ecase (char s 7) (#\- 0) (#\w #o0002))
     (ecase (char s 8) (#\- 0) (#\x #o0001) (#\S #o1000) (#\s #o1001))))
  
  (defun parse-unix-timestamp (x)
    (let ((n (typecase x
  	     (string (parse-integer x))
  	     (integer x))))
      (local-time:unix-to-timestamp n)))
  

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