linkit
exitval |= linkit(*argv, sourcedir, 1);
int linkit(char *, char *, int);
exit(linkit(argv[0], ".", 1));
exit(linkit(argv[0], argv[1], 0));
int linkit(char *, char *, int);
(void)linkit(name, myname(np), SYMLINK);
(void)linkit(name, myname(np), HARDLINK);
if (linkit(lnkbuf, name, SYMLINK) == FAIL)