It sets the directory named by the
.B TRIPEDIR
environment variable (or
-.B "*(/c"
+.B "\*(/c"
if the variable is unset) as the current directory.
.hP 2.
It acquires a UDP socket with an arbitrary kernel-selected port number.
the environment variable
.BR TRIPEDIR ;
if that's not specified, a default default of
-.B "*(/c"
+.B "\*(/c"
is used. Give a current directory of
.B .
if you don't want it to change directory at all.
environment variable
.BR TRIPESOCK ;
if that's not set either, then a default default of
-.B "*(/s/tripesock"
+.B "\*(/s/tripesock"
is used instead.
.TP
.BI "\-T, \-\-trace=" trace-opts