This functioin deletes a file in the file system. It will fail if the given file does not exist, or the calling process does not have sufficient privilege to delete the file. Wild cards are not expanded in the file name.
Gamma> fu = open("todeletefile.dat","r");
#<File:"todeletefile.dat">
Gamma> unlink("todeletefile.dat");
t
Gamma> unlink("todeletefile.dat");
nil
Gamma>