\f
;;;; UNIX-NAMESTRING
-(defun unix-namestring (pathname &optional (for-input t) executable-only)
- #!+sb-doc
- "Convert PATHNAME into a string that can be used with UNIX system calls.
- Search-lists and wild-cards are expanded."
- ;; toy@rtp.ericsson.se: Let unix-namestring also handle logical
- ;; pathnames too.
- ;; FIXME: What does this ^ mean? A bug? A remark on a change already made?
- (let ((path (let ((lpn (pathname pathname)))
- (if (typep lpn 'logical-pathname)
- (namestring (translate-logical-pathname lpn))
- pathname))))
- (enumerate-search-list
- (pathname path)
- (collect ((names))
- (enumerate-matches (name pathname nil :verify-existence for-input)
- (when (or (not executable-only)
- (and (eq (sb!unix:unix-file-kind name)
- :file)
- (sb!unix:unix-access name
- sb!unix:x_ok)))
- (names name)))
- (let ((names (names)))
- (when names
- (when (cdr names)
- (error 'simple-file-error
- :format-control "~S is ambiguous:~{~% ~A~}"
- :format-arguments (list pathname names)))
- (return (car names))))))))
+(defun empty-relative-pathname-spec-p (x)
+ (or (equal x "")
+ (and (pathnamep x)
+ (or (equal (pathname-directory x) '(:relative))
+ ;; KLUDGE: I'm not sure this second check should really
+ ;; have to be here. But on sbcl-0.6.12.7,
+ ;; (PATHNAME-DIRECTORY (PATHNAME "")) is NIL, and
+ ;; (PATHNAME "") seems to act like an empty relative
+ ;; pathname, so in order to work with that, I test
+ ;; for NIL here. -- WHN 2001-05-18
+ (null (pathname-directory x)))
+ (null (pathname-name x))
+ (null (pathname-type x)))
+ ;; (The ANSI definition of "pathname specifier" has
+ ;; other cases, but none of them seem to admit the possibility
+ ;; of being empty and relative.)
+ ))
+
+;;; Convert PATHNAME into a string that can be used with UNIX system
+;;; calls, or return NIL if no match is found. Search-lists and
+;;; wild-cards are expanded.
+(defun unix-namestring (pathname-spec &optional (for-input t))
+ ;; The ordinary rules of converting Lispy paths to Unix paths break
+ ;; down for the current working directory, which Lisp thinks of as
+ ;; "" (more or less, and modulo ANSI's *DEFAULT-PATHNAME-DEFAULTS*,
+ ;; which unfortunately SBCL, as of sbcl-0.6.12.8, basically ignores)
+ ;; and Unix thinks of as ".". Since we're at the interface between
+ ;; Unix system calls and things like ENSURE-DIRECTORIES-EXIST which
+ ;; think the Lisp way, we perform the conversion.
+ ;;
+ ;; (FIXME: The *right* way to deal with this special case is to
+ ;; merge PATHNAME-SPEC with *DEFAULT-PATHNAME-DEFAULTS* here, after
+ ;; which it's not a relative pathname any more so the special case
+ ;; is no longer an issue. But until *DEFAULT-PATHNAME-DEFAULTS*
+ ;; works, we use this hack.)
+ (if (empty-relative-pathname-spec-p pathname-spec)
+ "."
+ ;; Otherwise, the ordinary rules apply.
+ (let* ((possibly-logical-pathname (pathname pathname-spec))
+ (physical-pathname (if (typep possibly-logical-pathname
+ 'logical-pathname)
+ (namestring (translate-logical-pathname
+ possibly-logical-pathname))
+ possibly-logical-pathname))
+ (matches nil)) ; an accumulator for actual matches
+ (enumerate-matches (match physical-pathname nil
+ :verify-existence for-input)
+ (push match matches))
+ (case (length matches)
+ (0 nil)
+ (1 (first matches))
+ (t (error 'simple-file-error
+ :format-control "~S is ambiguous:~{~% ~A~}"
+ :format-arguments (list pathname-spec matches)))))))
\f
;;;; TRUENAME and PROBE-FILE
-;;; Another silly file function trivially different from another function.
+;;; This is only trivially different from PROBE-FILE, which is silly
+;;; but ANSI.
(defun truename (pathname)
#!+sb-doc
- "Return the pathname for the actual file described by the pathname
- An error of type file-error is signalled if no such file exists,
+ "Return the pathname for the actual file described by PATHNAME.
+ An error of type FILE-ERROR is signalled if no such file exists,
or the pathname is wild."
(if (wild-pathname-p pathname)
(error 'simple-file-error
- :format-control "bad place for a wild pathname"
+ :format-control "can't use a wild pathname here"
:pathname pathname)
(let ((result (probe-file pathname)))
(unless result
;;; If PATHNAME exists, return its truename, otherwise NIL.
(defun probe-file (pathname)
#!+sb-doc
- "Return a pathname which is the truename of the file if it exists, NIL
+ "Return a pathname which is the truename of the file if it exists, or NIL
otherwise. An error of type FILE-ERROR is signaled if pathname is wild."
- (if (wild-pathname-p pathname)
- (error 'simple-file-error
- :pathname pathname
- :format-control "bad place for a wild pathname")
- (let ((namestring (unix-namestring pathname t)))
- (when (and namestring (sb!unix:unix-file-kind namestring))
- (let ((truename (sb!unix:unix-resolve-links
- (sb!unix:unix-maybe-prepend-current-directory
- namestring))))
- (when truename
- (let ((*ignore-wildcards* t))
- (pathname (sb!unix:unix-simplify-pathname truename)))))))))
+ (when (wild-pathname-p pathname)
+ (error 'simple-file-error
+ :pathname pathname
+ :format-control "can't use a wild pathname here"))
+ (let ((namestring (unix-namestring pathname t)))
+ (when (and namestring (sb!unix:unix-file-kind namestring))
+ (let ((truename (sb!unix:unix-resolve-links
+ (sb!unix:unix-maybe-prepend-current-directory
+ namestring))))
+ (when truename
+ (let ((*ignore-wildcards* t))
+ (pathname (sb!unix:unix-simplify-pathname truename))))))))
\f
;;;; miscellaneous other operations
\f
(defun ensure-directories-exist (pathspec &key verbose (mode #o777))
#!+sb-doc
- "Tests whether the directories containing the specified file
- actually exist, and attempts to create them if they do not.
- Portable programs should avoid using the :MODE argument."
+ "Test whether the directories containing the specified file
+ 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 (pathname pathspec))
(pathname (if (typep pathname 'logical-pathname)
(translate-logical-pathname pathname)
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