CSLINK(7) — UNIX Programmer’s Manual
cslink − conditional symbolic link expr?name1:name2
expr1?name1:expr2?name2: ... :namen conditional symbolic link is special type of the symbolic link, that has the following format; expr?name1:name2 The ‘expr’ can be used the next expression. $env==val Ex.) The format of the symbolic link is following format, $env==val?name1:name2 if the value of the environment variable ‘env’ is ‘val’, name1 will be refered. Otherwise, name2 will be refered.
SEE ALSO
NEWS-OSRelease 3.3