Hello,
It is well known that implementations of CL pathnames have been greatly implementation dependant. However, the standard still specifies clear behavior for logical pathnames, for one thing, and for the other, since there are several implementations working on the same POSIX systems (unix including linux and MacOSX; and MS-Windows), it is desirable that all implementations converge in their handling of pathnames on these plateforms.
Personnaly, I resolved to use logical pathnames and logical-pathname translations as much as possible, and to use make-pathname to build portably physical pathnames.
However, most implementations have problems dealing with these two aspects. To improve the situation, I wrote a little script to check the behavior of implementations in these two aspects.
The script can be found at:
ftp://ftp.informatimago.com/users/pjb/lisp/check-pathnames.lisp
Since I'm sending a similar message to most implementation lists, it might be better, if there is any need for 'language lawyer' discussions, to direct them to news:comp.lang.lisp.
Here are the results for the latest abcl (from svn): ------------------------------------------------------------------------ [pjb@kuiper :0.0 lisp]$ abcl --noinit --load check-pathnames.lisp Armed Bear Common Lisp 0.24.0-dev Java 1.6.0_22 Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM Low-level initialization completed in 0.244 seconds. Startup completed in 0.766 seconds. check-pathnames of Armed Bear Common Lisp (0.24.0-dev)
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Test and probe conforming logical pathnames, and their translation to unix physical pathnames.
We want to check the good working of logical pathnames, and the translation of logical pathnames to physical pathnames, in a semi-standard way on unix systems.
Namely, given the logical host and its translations:
(setf (logical-pathname-translations "LOGICAL") nil) (setf (logical-pathname-translations "LOGICAL") '((#P"LOGICAL:**;*.*" #P"/tmp/**/*.*") (#P"LOGICAL:**;*" #P"/tmp/**/*")))
#P"LOGICAL:DIR;SUBDIR;NAME.TYPE.NEWEST" must be the same as (make-pathname :host "LOGICAL" :directory '(:absolute "DIR" "SUBDIR") :name "NAME" :type "TYPE" :version :newest :case :common) and must translate to: #P"/tmp/dir/subdir/name.type" on unix.
Merging physical pathnames specified with :case :common is also tested:
(merge-pathnames (make-pathname :directory '(:relative "DIR" "SUBDIR") :name "NAME" :type "TYPE" :version :newest :case :common :default #1=#P"/tmp/") #1# nil)
must give #P"/tmp/dir/subdir/name.type" on unix.
================================================================================ -------------------------------------------------------------------------------- Failed assertion: (IMPLY (EQL CUSTOMARY-CASE-1 :UPPER) (EQL CUSTOMARY-CASE-2 :UPPER)) with: (EQL CUSTOMARY-CASE-1 :UPPER) = T and: (EQL CUSTOMARY-CASE-2 :UPPER) = NIL CUSTOMARY-CASE-1 = :UPPER CUSTOMARY-CASE-2 = :LOWER
The customary case for the file system of Armed Bear Common Lisp (0.24.0-dev) seems to be lower case.
*FEATURES* = (:X86-64 :JAVA-1.6 :ARMEDBEAR :ABCL :COMMON-LISP :ANSI-CL :UNIX :LINUX :CDR6)
================================================================================ (MAKE-PATHNAME :HOST "LOGICAL" :DEVICE :UNSPECIFIC :DIRECTORY (:ABSOLUTE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :VERSION :NEWEST :CASE :COMMON)
LOGICAL-PATHNAME #P"LOGICAL:DIR;SUBDIR;NAME.TYPE.NEWEST" -------------------- :case :local (default) Host : "LOGICAL" Device : :UNSPECIFIC Directory : (:ABSOLUTE "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : :NEWEST -------------------- :case :common Host : "LOGICAL" Device : :UNSPECIFIC Directory : (:ABSOLUTE "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : :NEWEST -------------------- -------------------------------------------------------------------------------- Failed assertion: (STRING= (PATHNAME-HOST PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-HOST PATH :CASE :LOCAL) = "LOGICAL" and: (POP EXPECTED-VALUES) = "logical" 19.2.2.1.2 makes no exception for pathname-host of logical pathnames. -------------------------------------------------------------------------------- Failed assertion: (DIRLIST= (PATHNAME-DIRECTORY PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-DIRECTORY PATH :CASE :LOCAL) = (:ABSOLUTE "DIR" "SUBDIR") and: (POP EXPECTED-VALUES) = (:ABSOLUTE "dir" "subdir") -------------------------------------------------------------------------------- Failed assertion: (STRING= (PATHNAME-NAME PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-NAME PATH :CASE :LOCAL) = "NAME" and: (POP EXPECTED-VALUES) = "name" -------------------------------------------------------------------------------- Failed assertion: (STRING= (PATHNAME-TYPE PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-TYPE PATH :CASE :LOCAL) = "TYPE" and: (POP EXPECTED-VALUES) = "type"
================================================================================ (MAKE-PATHNAME :HOST "logical" :DEVICE :UNSPECIFIC :DIRECTORY (:ABSOLUTE "dir" "subdir") :NAME "name" :TYPE "type" :VERSION :NEWEST :CASE :LOCAL)
LOGICAL-PATHNAME #P"LOGICAL:DIR;SUBDIR;NAME.TYPE.NEWEST" -------------------- :case :local (default) Host : "LOGICAL" Device : :UNSPECIFIC Directory : (:ABSOLUTE "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : :NEWEST -------------------- :case :common Host : "LOGICAL" Device : :UNSPECIFIC Directory : (:ABSOLUTE "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : :NEWEST -------------------- -------------------------------------------------------------------------------- Failed assertion: (STRING= (PATHNAME-HOST PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-HOST PATH :CASE :LOCAL) = "LOGICAL" and: (POP EXPECTED-VALUES) = "logical" 19.2.2.1.2 makes no exception for pathname-host of logical pathnames. -------------------------------------------------------------------------------- Failed assertion: (DIRLIST= (PATHNAME-DIRECTORY PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-DIRECTORY PATH :CASE :LOCAL) = (:ABSOLUTE "DIR" "SUBDIR") and: (POP EXPECTED-VALUES) = (:ABSOLUTE "dir" "subdir") -------------------------------------------------------------------------------- Failed assertion: (STRING= (PATHNAME-NAME PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-NAME PATH :CASE :LOCAL) = "NAME" and: (POP EXPECTED-VALUES) = "name" -------------------------------------------------------------------------------- Failed assertion: (STRING= (PATHNAME-TYPE PATH :CASE :LOCAL) (POP EXPECTED-VALUES)) with: (PATHNAME-TYPE PATH :CASE :LOCAL) = "TYPE" and: (POP EXPECTED-VALUES) = "type"
-------------------------------------------------------------------------------- Failed assertion: ((LAMBDA (DIRLIST PATH) (EQUAL DIRLIST (PATHNAME-DIRECTORY PATH :CASE :LOCAL))) '(:ABSOLUTE "tmp" "dir" "subdir") (MERGE-PATHNAMES (MAKE-PATHNAME :DIRECTORY '(:RELATIVE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :CASE :COMMON :DEFAULTS #P"/tmp/") #P"/tmp/" NIL)) with: '(:ABSOLUTE "tmp" "dir" "subdir") = (:ABSOLUTE "tmp" "dir" "subdir") and: (MERGE-PATHNAMES (MAKE-PATHNAME :DIRECTORY '(:RELATIVE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :CASE :COMMON :DEFAULTS #P"/tmp/") #P"/tmp/" NIL) = #P"/tmp/DIR/SUBDIR/NAME.TYPE"
PATHNAME #P"/tmp/DIR/SUBDIR/NAME.TYPE" -------------------- :case :local (default) Host : NIL Device : NIL Directory : (:ABSOLUTE "tmp" "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : NIL -------------------- :case :common Host : NIL Device : NIL Directory : (:ABSOLUTE "tmp" "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : NIL -------------------- -------------------------------------------------------------------------------- Failed assertion: ((LAMBDA (NAME PATH) (EQUAL NAME (PATHNAME-NAME PATH :CASE :LOCAL))) "name" (MERGE-PATHNAMES (MAKE-PATHNAME :DIRECTORY '(:RELATIVE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :CASE :COMMON :DEFAULTS #P"/tmp/") #P"/tmp/" NIL)) with: "name" = "name" and: (MERGE-PATHNAMES (MAKE-PATHNAME :DIRECTORY '(:RELATIVE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :CASE :COMMON :DEFAULTS #P"/tmp/") #P"/tmp/" NIL) = #P"/tmp/DIR/SUBDIR/NAME.TYPE"
PATHNAME #P"/tmp/DIR/SUBDIR/NAME.TYPE" -------------------- :case :local (default) Host : NIL Device : NIL Directory : (:ABSOLUTE "tmp" "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : NIL -------------------- :case :common Host : NIL Device : NIL Directory : (:ABSOLUTE "tmp" "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : NIL -------------------- -------------------------------------------------------------------------------- Failed assertion: ((LAMBDA (TYPE PATH) (EQUAL TYPE (PATHNAME-TYPE PATH :CASE :LOCAL))) "type" (MERGE-PATHNAMES (MAKE-PATHNAME :DIRECTORY '(:RELATIVE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :CASE :COMMON :DEFAULTS #P"/tmp/") #P"/tmp/" NIL)) with: "type" = "type" and: (MERGE-PATHNAMES (MAKE-PATHNAME :DIRECTORY '(:RELATIVE "DIR" "SUBDIR") :NAME "NAME" :TYPE "TYPE" :CASE :COMMON :DEFAULTS #P"/tmp/") #P"/tmp/" NIL) = #P"/tmp/DIR/SUBDIR/NAME.TYPE"
PATHNAME #P"/tmp/DIR/SUBDIR/NAME.TYPE" -------------------- :case :local (default) Host : NIL Device : NIL Directory : (:ABSOLUTE "tmp" "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : NIL -------------------- :case :common Host : NIL Device : NIL Directory : (:ABSOLUTE "tmp" "DIR" "SUBDIR") Name : "NAME" Type : "TYPE" Version : NIL -------------------- Type ":help" for a list of available commands. CL-USER(1): (quit) [pjb@kuiper :0.0 lisp]$