unlink - remove a directory entry
integer function unlink (name)
Unlink causes the directory entry specified by pathname name to be
removed. If this was the last link to the file, the contents of the
file are lost. The returned value will be zero if successful; a system
error code otherwise.
unlink(2), link(3F), filsys(5), perror(3F)
Pathnames can be no longer than MAXPATHLEN as defined in <sys/param.h>.
4th Berkeley Distribution 18 July 1983 UNLINK(3F)