The following procedures are only defined on platforms that support symbolic links. In this case, the feature unix:symlinks is provided when the UNIX extension is loaded.
The UNIX lstat() system call. unix-lstat returns a stat-record (see unix-stat above).
The UNIX readlink() system call. unix-readlink returns the contents of specified symbolic link as a string.
(unix-symlink filename1 filename2)
The UNIX symlink() system call.
unix-symlink returns the non-printing object.