[Function]
extensions:default-directory
Return the current working directory as a pathname. If set with setf, set the working directory.
[Function]
extensions:file-writable name
This function accepts a pathname and returns t if the current process can write it, and nil otherwise.
[Function]
extensions:unix-namestring pathname
&optional for-input
This function converts pathname into a string that can be used with UNIX system calls. Search-lists and wildcards are expanded. for-input controls the treatment of search-lists: when true (the default) and the file exists anywhere on the search-list, then that absolute pathname is returned; otherwise the first element of the search-list is used as the directory.