CLISP has traditionally taken the view that a directory is a
separate object and not a special kind of file, so whenever the
standard says that a function operates on files
without specifically mentioning that it also works on
directories, CLISP SIGNALs an ERROR when passed a
directory.
CLISP provides separate directory functions, such as
EXT:DELETE-DIRECTORY, EXT:RENAME-DIRECTORY et al.
You can use DIRECTORY or EXT:PROBE-PATHNAME to figure out whether a
given namestring refers to a file or a directory.
EXT:PROBE-PATHNAME Function EXT:PROBE-PATHNAME figures out whether the argument refers to
an existing directory or an existing regular file, and returns 4 values
if the filesystem object exists:
or NIL if it does not exist.
E.g., if you have a file file, a directory directory,
a symbolic link link-file pointing to file
and a symbolic link link-dir pointing to directory,
then
(EXT:PROBE-PATHNAME#P"filename") ⇒#P"/.../filename"⇒#P"/.../filename"⇒3427467015⇒3171976(EXT:PROBE-PATHNAME#P"filename/") ⇒#P"/.../filename"⇒#P"/.../filename"⇒3427467015⇒3171976(EXT:PROBE-PATHNAME#P"directory") ⇒#P"/.../directory/"⇒#P"/.../directory/"⇒3426940352⇒1024(EXT:PROBE-PATHNAME#P"directory/") ⇒#P"/.../directory/"⇒#P"/.../directory/"⇒3426940352⇒1024(EXT:PROBE-PATHNAME#P"link-file") ⇒#P"/.../filename"⇒#P"/.../link-file"⇒3427467015⇒3171976(EXT:PROBE-PATHNAME#P"link-file/") ⇒#P"/.../filename"⇒#P"/.../link-file"⇒3427467015⇒3171976(EXT:PROBE-PATHNAME#P"link-dir") ⇒#P"/.../directory/"⇒#P"/.../link-dir/"⇒3426940352⇒1024(EXT:PROBE-PATHNAME#P"link-dir/") ⇒#P"/.../directory/"⇒#P"/.../link-dir/"⇒3426940352⇒1024
| These notes document CLISP version 2.49 | Last modified: 2010年07月07日 |