-;;;; file system interface functions -- fairly Unix-specific
+;;;; file system interface functions -- fairly Unix-centric, but with
+;;;; differences between Unix and Win32 papered over.
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
\f
;;;; Unix pathname host support
+;;; FIXME: the below shouldn't really be here, but in documentation
+;;; (chapter 19 makes a lot of requirements for documenting
+;;; implementation-dependent decisions), but anyway it's probably not
+;;; what we currently do.
+;;;
;;; Unix namestrings have the following format:
;;;
;;; namestring := [ directory ] [ file [ type [ version ]]]
;;; - If the first character is a dot, it's part of the file. It is not
;;; considered a dot in the following rules.
;;;
-;;; - If there is only one dot, it separates the file and the type.
-;;;
-;;; - If there are multiple dots and the stuff following the last dot
-;;; is a valid version, then that is the version and the stuff between
-;;; the second to last dot and the last dot is the type.
+;;; - Otherwise, the last dot separates the file and the type.
;;;
;;; Wildcard characters:
;;;
;;; following characters, it is considered part of a wildcard pattern
;;; and has the following meaning.
;;;
-;;; ? - matches any character
+;;; ? - matches any one character
;;; * - matches any zero or more characters.
;;; [abc] - matches any of a, b, or c.
;;; {str1,str2,...,strn} - matches any of str1, str2, ..., or strn.
+;;; (FIXME: no it doesn't)
;;;
;;; Any of these special characters can be preceded by a backslash to
;;; cause it to be treated as a regular character.
(/show0 "filesys.lisp 200")
-;;; Take a string and return a list of cons cells that mark the char
-;;; separated subseq. The first value is true if absolute directories
-;;; location.
-(defun split-at-slashes (namestr start end)
- (declare (type simple-base-string namestr)
- (type index start end))
- (let ((absolute (and (/= start end)
- (char= (schar namestr start) #\/))))
- (when absolute
- (incf start))
- ;; Next, split the remainder into slash-separated chunks.
- (collect ((pieces))
- (loop
- (let ((slash (position #\/ namestr :start start :end end)))
- (pieces (cons start (or slash end)))
- (unless slash
- (return))
- (setf start (1+ slash))))
- (values absolute (pieces)))))
-
-(defun parse-unix-namestring (namestring start end)
- (declare (type simple-string namestring)
- (type index start end))
- (setf namestring (coerce namestring 'simple-base-string))
- (multiple-value-bind (absolute pieces)
- (split-at-slashes namestring start end)
- (multiple-value-bind (name type version)
- (let* ((tail (car (last pieces)))
- (tail-start (car tail))
- (tail-end (cdr tail)))
- (unless (= tail-start tail-end)
- (setf pieces (butlast pieces))
- (extract-name-type-and-version namestring tail-start tail-end)))
-
- (when (stringp name)
- (let ((position (position-if (lambda (char)
- (or (char= char (code-char 0))
- (char= char #\/)))
- name)))
- (when position
- (error 'namestring-parse-error
- :complaint "can't embed #\\Nul or #\\/ in Unix namestring"
- :namestring namestring
- :offset position))))
- ;; Now we have everything we want. So return it.
- (values nil ; no host for Unix namestrings
- nil ; no device for Unix namestrings
- (collect ((dirs))
- (dolist (piece pieces)
- (let ((piece-start (car piece))
- (piece-end (cdr piece)))
- (unless (= piece-start piece-end)
- (cond ((string= namestring ".."
- :start1 piece-start
- :end1 piece-end)
- (dirs :up))
- ((string= namestring "**"
- :start1 piece-start
- :end1 piece-end)
- (dirs :wild-inferiors))
- (t
- (dirs (maybe-make-pattern namestring
- piece-start
- piece-end)))))))
- (cond (absolute
- (cons :absolute (dirs)))
- ((dirs)
- (cons :relative (dirs)))
- (t
- nil)))
- name
- type
- version))))
-
-(defun parse-native-unix-namestring (namestring start end)
- (declare (type simple-string namestring)
- (type index start end))
- (setf namestring (coerce namestring 'simple-base-string))
- (multiple-value-bind (absolute ranges)
- (split-at-slashes namestring start end)
- (let* ((components (loop for ((start . end) . rest) on ranges
- for piece = (subseq namestring start end)
- collect (if (and (string= piece "..") rest)
- :up
- piece)))
- (name-and-type
- (let* ((end (first (last components)))
- (dot (position #\. end :from-end t)))
- ;; FIXME: can we get this dot-interpretation knowledge
- ;; from existing code? EXTRACT-NAME-TYPE-AND-VERSION
- ;; does slightly more work than that.
- (cond
- ((string= end "")
- (list nil nil))
- ((and dot (> dot 0))
- (list (subseq end 0 dot) (subseq end (1+ dot))))
- (t
- (list end nil))))))
- (values nil
- nil
- (cons (if absolute :absolute :relative) (butlast components))
- (first name-and-type)
- (second name-and-type)
- nil))))
-
-(/show0 "filesys.lisp 300")
-
-(defun unparse-unix-host (pathname)
- (declare (type pathname pathname)
- (ignore pathname))
- ;; this host designator needs to be recognized as a physical host in
- ;; PARSE-NAMESTRING. Until sbcl-0.7.3.x, we had "Unix" here, but
- ;; that's a valid Logical Hostname, so that's a bad choice. -- CSR,
- ;; 2002-05-09
- "")
-
-(defun unparse-unix-piece (thing)
- (etypecase thing
- ((member :wild) "*")
- (simple-string
- (let* ((srclen (length thing))
- (dstlen srclen))
- (dotimes (i srclen)
- (case (schar thing i)
- ((#\* #\? #\[)
- (incf dstlen))))
- (let ((result (make-string dstlen))
- (dst 0))
- (dotimes (src srclen)
- (let ((char (schar thing src)))
- (case char
- ((#\* #\? #\[)
- (setf (schar result dst) #\\)
- (incf dst)))
- (setf (schar result dst) char)
- (incf dst)))
- result)))
- (pattern
- (collect ((strings))
- (dolist (piece (pattern-pieces thing))
- (etypecase piece
- (simple-string
- (strings piece))
- (symbol
- (ecase piece
- (:multi-char-wild
- (strings "*"))
- (:single-char-wild
- (strings "?"))))
- (cons
- (case (car piece)
- (:character-set
- (strings "[")
- (strings (cdr piece))
- (strings "]"))
- (t
- (error "invalid pattern piece: ~S" piece))))))
- (apply #'concatenate
- 'simple-base-string
- (strings))))))
-
-(defun unparse-unix-directory-list (directory)
- (declare (type list directory))
- (collect ((pieces))
- (when directory
- (ecase (pop directory)
- (:absolute
- (pieces "/"))
- (:relative
- ;; nothing special
- ))
- (dolist (dir directory)
- (typecase dir
- ((member :up)
- (pieces "../"))
- ((member :back)
- (error ":BACK cannot be represented in namestrings."))
- ((member :wild-inferiors)
- (pieces "**/"))
- ((or simple-string pattern (member :wild))
- (pieces (unparse-unix-piece dir))
- (pieces "/"))
- (t
- (error "invalid directory component: ~S" dir)))))
- (apply #'concatenate 'simple-base-string (pieces))))
-
-(defun unparse-unix-directory (pathname)
- (declare (type pathname pathname))
- (unparse-unix-directory-list (%pathname-directory pathname)))
-
-(defun unparse-unix-file (pathname)
- (declare (type pathname pathname))
- (collect ((strings))
- (let* ((name (%pathname-name pathname))
- (type (%pathname-type pathname))
- (type-supplied (not (or (null type) (eq type :unspecific)))))
- ;; Note: by ANSI 19.3.1.1.5, we ignore the version slot when
- ;; translating logical pathnames to a filesystem without
- ;; versions (like Unix).
- (when name
- (when (and (null type)
- (typep name 'string)
- (> (length name) 0)
- (position #\. name :start 1))
- (error "too many dots in the name: ~S" pathname))
- (when (and (typep name 'string)
- (string= name ""))
- (error "name is of length 0: ~S" pathname))
- (strings (unparse-unix-piece name)))
- (when type-supplied
- (unless name
- (error "cannot specify the type without a file: ~S" pathname))
- (when (typep type 'simple-string)
- (when (position #\. type)
- (error "type component can't have a #\. inside: ~S" pathname)))
- (strings ".")
- (strings (unparse-unix-piece type))))
- (apply #'concatenate 'simple-base-string (strings))))
-
-(/show0 "filesys.lisp 406")
-
-(defun unparse-unix-namestring (pathname)
- (declare (type pathname pathname))
- (concatenate 'simple-base-string
- (unparse-unix-directory pathname)
- (unparse-unix-file pathname)))
-
-(defun unparse-native-unix-namestring (pathname)
- (declare (type pathname pathname))
- (let ((directory (pathname-directory pathname))
- (name (pathname-name pathname))
- (type (pathname-type pathname)))
- (coerce
- (with-output-to-string (s)
- (ecase (car directory)
- (:absolute (write-char #\/ s))
- (:relative))
- (dolist (piece (cdr directory))
- (typecase piece
- ((member :up) (write-string ".." s))
- (string (write-string piece s))
- (t (error "ungood piece in NATIVE-NAMESTRING: ~S" piece)))
- (write-char #\/ s))
- (when name
- (unless (stringp name)
- (error "non-STRING name in NATIVE-NAMESTRING: ~S" name))
- (write-string name s)
- (when type
- (unless (stringp type)
- (error "non-STRING type in NATIVE-NAMESTRING: ~S" name))
- (write-char #\. s)
- (write-string type s))))
- 'simple-base-string)))
-
-(defun unparse-unix-enough (pathname defaults)
- (declare (type pathname pathname defaults))
- (flet ((lose ()
- (error "~S cannot be represented relative to ~S."
- pathname defaults)))
- (collect ((strings))
- (let* ((pathname-directory (%pathname-directory pathname))
- (defaults-directory (%pathname-directory defaults))
- (prefix-len (length defaults-directory))
- (result-directory
- (cond ((null pathname-directory) '(:relative))
- ((eq (car pathname-directory) :relative)
- pathname-directory)
- ((and (> prefix-len 1)
- (>= (length pathname-directory) prefix-len)
- (compare-component (subseq pathname-directory
- 0 prefix-len)
- defaults-directory))
- ;; Pathname starts with a prefix of default. So
- ;; just use a relative directory from then on out.
- (cons :relative (nthcdr prefix-len pathname-directory)))
- ((eq (car pathname-directory) :absolute)
- ;; We are an absolute pathname, so we can just use it.
- pathname-directory)
- (t
- (bug "Bad fallthrough in ~S" 'unparse-unix-enough)))))
- (strings (unparse-unix-directory-list result-directory)))
- (let* ((pathname-type (%pathname-type pathname))
- (type-needed (and pathname-type
- (not (eq pathname-type :unspecific))))
- (pathname-name (%pathname-name pathname))
- (name-needed (or type-needed
- (and pathname-name
- (not (compare-component pathname-name
- (%pathname-name
- defaults)))))))
- (when name-needed
- (unless pathname-name (lose))
- (when (and (null pathname-type)
- (position #\. pathname-name :start 1))
- (error "too many dots in the name: ~S" pathname))
- (strings (unparse-unix-piece pathname-name)))
- (when type-needed
- (when (or (null pathname-type) (eq pathname-type :unspecific))
- (lose))
- (when (typep pathname-type 'simple-base-string)
- (when (position #\. pathname-type)
- (error "type component can't have a #\. inside: ~S" pathname)))
- (strings ".")
- (strings (unparse-unix-piece pathname-type))))
- (apply #'concatenate 'simple-string (strings)))))
\f
;;;; wildcard matching stuff
(/show0 "filesys.lisp 500")
;;; Call FUNCTION on matches.
+;;;
+;;; KLUDGE: this assumes that an absolute pathname is indicated to the
+;;; operating system by having a directory separator as the first
+;;; character in the directory part. This is true for Win32 pathnames
+;;; and for Unix pathnames, but it isn't true for LispM pathnames (and
+;;; their bastard offspring, logical pathnames. Also it assumes that
+;;; Unix pathnames have an empty or :unspecific device, and that
+;;; windows drive letters are the only kinds of non-empty/:UNSPECIFIC
+;;; devices.
(defun %enumerate-matches (pathname verify-existence follow-links function)
(/noshow0 "entering %ENUMERATE-MATCHES")
(when (pathname-type pathname)
(when (and (integerp (pathname-version pathname))
(member (pathname-type pathname) '(nil :unspecific)))
(error "cannot supply a version without a type:~% ~S" pathname))
- (let ((directory (pathname-directory pathname)))
- (/noshow0 "computed DIRECTORY")
- (if directory
- (ecase (first directory)
- (:absolute
- (/noshow0 "absolute directory")
- (%enumerate-directories "/" (rest directory) pathname
- verify-existence follow-links
- nil function))
- (:relative
- (/noshow0 "relative directory")
- (%enumerate-directories "" (rest directory) pathname
- verify-existence follow-links
- nil function)))
- (%enumerate-files "" pathname verify-existence function))))
+ (let ((host (pathname-host pathname))
+ (device (pathname-device pathname))
+ (directory (pathname-directory pathname)))
+ (/noshow0 "computed HOST and DIRECTORY")
+ (let* ((dirstring (if directory
+ (ecase (first directory)
+ (:absolute (host-unparse-directory-separator host))
+ (:relative ""))
+ ""))
+ (devstring (if (and device (not (eq device :unspecific)))
+ (concatenate 'simple-base-string (string device) (string #\:))
+ ""))
+ (headstring (concatenate 'simple-base-string devstring dirstring)))
+ (if directory
+ (%enumerate-directories headstring (rest directory) pathname
+ verify-existence follow-links nil function)
+ (%enumerate-files headstring pathname verify-existence function)))))
;;; Call FUNCTION on directories.
(defun %enumerate-directories (head tail pathname verify-existence
- follow-links nodes function)
+ follow-links nodes function
+ &aux (host (pathname-host pathname)))
(declare (simple-string head))
(macrolet ((unix-xstat (name)
`(if follow-links
(simple-string
(let ((head (concatenate 'base-string head piece)))
(with-directory-node-noted (head)
- (%enumerate-directories (concatenate 'base-string head "/")
- (cdr tail) pathname
- verify-existence follow-links
- nodes function))))
+ (%enumerate-directories
+ (concatenate 'base-string head
+ (host-unparse-directory-separator host))
+ (cdr tail) pathname
+ verify-existence follow-links
+ nodes function))))
((member :wild-inferiors)
;; now with extra error case handling from CLHS
;; 19.2.2.4.3 -- CSR, 2004-01-24
(eql (cdr dir) ino))
(return t)))
(let ((nodes (cons (cons dev ino) nodes))
- (subdir (concatenate 'base-string subdir "/")))
+ (subdir (concatenate 'base-string subdir (host-unparse-directory-separator host))))
(%enumerate-directories subdir tail pathname
verify-existence follow-links
nodes function))))))))
(eql (logand mode sb!unix:s-ifmt)
sb!unix:s-ifdir))
(let ((nodes (cons (cons dev ino) nodes))
- (subdir (concatenate 'base-string subdir "/")))
+ (subdir (concatenate 'base-string subdir (host-unparse-directory-separator host))))
(%enumerate-directories subdir (rest tail) pathname
verify-existence follow-links
nodes function))))))))
((member :up)
- (when (string= head "/")
+ (when (string= head (host-unparse-directory-separator host))
(error 'simple-file-error
:pathname pathname
:format-control "~@<invalid use of :UP after :ABSOLUTE.~@:>"))
(with-directory-node-removed (head)
(let ((head (concatenate 'base-string head "..")))
(with-directory-node-noted (head)
- (%enumerate-directories (concatenate 'base-string head "/")
+ (%enumerate-directories (concatenate 'base-string head (host-unparse-directory-separator host))
(rest tail) pathname
verify-existence follow-links
nodes function)))))
((member :back)
;; :WILD-INFERIORS is handled above, so the only case here
;; should be (:ABSOLUTE :BACK)
- (aver (string= head "/"))
+ (aver (string= head (host-unparse-directory-separator host)))
(error 'simple-file-error
:pathname pathname
:format-control "~@<invalid use of :BACK after :ABSOLUTE.~@:>"))))
;;; Convert PATHNAME into a string that can be used with UNIX system
;;; calls, or return NIL if no match is found. Wild-cards are expanded.
+;;;
+;;; FIXME: apart from the error checking (for wildness and for
+;;; existence) and conversion to physical pathanme, this is redundant
+;;; with UNPARSE-NATIVE-UNIX-NAMESTRING; one should probably be
+;;; written in terms of the other.
+;;;
+;;; FIXME: actually this (I think) works not just for Unix.
(defun unix-namestring (pathname-spec &optional (for-input t))
(let* ((namestring (physicalize-pathname (merge-pathnames pathname-spec)))
(matches nil)) ; an accumulator for actual matches
(let* ((*ignore-wildcards* t)
(name (sb!unix:unix-simplify-pathname trueishname)))
(if (eq (sb!unix:unix-file-kind name) :directory)
+ ;; FIXME: this might work, but it's ugly.
(pathname (concatenate 'string name "/"))
(pathname name))))))))
\f
actually exist, and attempt to create them if they do not.
The MODE argument is a CMUCL/SBCL-specific extension to control
the Unix permission bits."
- (let ((pathname (physicalize-pathname (pathname pathspec)))
+ (let ((pathname (physicalize-pathname (merge-pathnames (pathname pathspec))))
(created-p nil))
(when (wild-pathname-p pathname)
(error 'simple-file-error
projects / sbcl.git / blobdiff