File: autoconf.info,  Node: Slashes,  Next: Special Shell Variables,  Prev: Parentheses,  Up: Portable Shell

11.11 Slashes in Shell Scripts
==============================

Unpatched Tru64 5.1 ‘sh’ omits the last slash of command-line arguments
that contain two trailing slashes:

     $ echo / // /// //// .// //.
     / / // /// ./ //.
     $ x=//
     $ eval "echo \$x"
     /
     $ set -x
     $ echo abc | tr -t ab //
     + echo abc
     + tr -t ab /
     /bc

   Unpatched Tru64 4.0 ‘sh’ adds a slash after ‘"$var"’ if the variable
is empty and the second double-quote is followed by a word that begins
and ends with slash:

     $ sh -xc 'p=; echo "$p"/ouch/'
     p=
     + echo //ouch/
     //ouch/

   However, our understanding is that patches are available, so perhaps
it's not worth worrying about working around these horrendous bugs.