man/manpath.sh

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#
# Current manpath
#
if test -x /usr/bin/manpath -a -z "$MANPATHISSET"
then
_tmpenv="$MANPATH"
unset MANPATH
_tmpman="$(/usr/bin/manpath -q)"
if test -n "$_tmpenv" -a "$_tmpenv" != ${_tmpman} ; then
MANPATH="${_tmpenv}:${_tmpman}"
else
MANPATH="${_tmpman}"
fi
unset _tmpenv _tmpman
MANPATHISSET=yes
export MANPATH MANPATHISSET
fi