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|
#! /bin/sh
# groffer - display groff files
# Source file position: <groff-source>/contrib/groffer/groffer.sh
# Copyright (C) 2001,2002,2003,2004,2005
# Free Software Foundation, Inc.
# Written by Bernd Warken
# This file is part of groff version @VERSION@ (eventually 1.19.2).
# groff is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
# groff is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
# You should have received a copy of the GNU General Public License
# along with groff; see the files COPYING and LICENSE in the top
# directory of the groff source. If not, write to the Free Software
# Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA.
_PROGRAM_NAME='groffer';
_PROGRAM_VERSION='0.9.20';
_LAST_UPDATE='30 July 2005';
########################################################################
# Determine the shell under which to run this script from the command
# line arguments or $GROFF_OPT; if none is specified, just go on with
# the starting shell.
if test _"${_GROFFER_RUN}"_ = __;
then
# only reached during the first run of the script
export _GROFFER_RUN; # counter for the runs of groffer
_GROFFER_RUN='first';
export _PROGRAM_NAME;
export _PROGRAM_VERSION;
export _LAST_UPDATE;
export GROFFER_OPT; # option environment for groffer
export _GROFFER_SH; # file name of this shell script
export _OUTPUT_FILE_NAME; # output generated, see main_set_res..()
export _CONF_FILES; # configuration files
_CONF_FILES="/etc/groff/groffer.conf ${HOME}/.groff/groffer.conf";
case "$0" in
*${_PROGRAM_NAME}*)
_GROFFER_SH="$0";
# was: _GROFFER_SH="@BINDIR@/${_PROGRAM_NAME}";
;;
*)
echo "The ${_PROGRAM_NAME} script should be started directly." >&2
exit 1;
;;
esac;
export _NULL_DEV;
if test -c /dev/null;
then
_NULL_DEV="/dev/null";
else
_NULL_DEV="NUL";
fi;
# test of `unset'
export _UNSET;
export _foo;
_foo=bar;
_res="$(unset _foo 2>&1)";
if unset _foo >${_NULL_DEV} 2>&1 && \
test _"${_res}"_ = __ && test _"${_foo}"_ = __
then
_UNSET='unset';
eval "${_UNSET}" _res;
else
_UNSET=':';
fi;
###########################
# _get_opt_shell ("$@")
#
# Determine whether `--shell' was specified in $GROFF_OPT or in $*;
# if so, echo its argument.
#
# Output: the shell name if it was specified
#
_get_opt_shell()
{
case " ${GROFFER_OPT} $*" in
*\ --shell\ *|*\ --shell=*)
(
eval set x "${GROFFER_OPT}" '"$@"';
shift;
_sh='';
while test $# != 0
do
case "$1" in
--shell)
if test "$#" -ge 2;
then
_sh="$2";
shift;
fi;
;;
--shell=?*)
# delete up to first `=' character
_sh="$(echo x"$1" | sed -e '
s/^x//
s/^[^=]*=//
')";
;;
esac;
shift;
done;
cat <<EOF
${_sh}
EOF
)
;;
esac;
}
###########################
# _test_on_shell (<name>)
#
# Test whether <name> is a shell program of Bourne type (POSIX sh).
#
_test_on_shell()
{
if test "$#" -le 0 || test _"$1"_ = __;
then
return 1;
fi;
# do not quote $1 to allow arguments
test _"$(eval $1 -c "'"'s=ok; echo $s'"'" 2>${_NULL_DEV})"_ = _ok_;
}
###########################
# do the shell determination from command line and $GROFFER_OPT
_shell="$(_get_opt_shell "$@")";
if test _"${_shell}"_ = __;
then
# none found, so look at the `--shell' lines in configuration files
export f;
# for f in $_CONF_FILES
for f in $(eval set x ${_CONF_FILES}; shift; echo "$@")
do
if test -f "$f";
then
_all="$(cat "$f" | sed -n -e 's/^--shell[= ] *\([^ ]*\)$/\1/p')"
# for s in $_all
for s in $(eval set x ${_all}; shift; echo "$@")
do
_shell="$s";
done;
fi;
done;
eval ${_UNSET} f;
eval ${_UNSET} s;
eval ${_UNSET} _all;
fi;
export _GROFFER2_SH; # file name of the script that follows up
_GROFFER2_SH='@libdir@/groff/groffer/groffer2.sh';
# restart the script with the last found $_shell, if it is a shell
if _test_on_shell "${_shell}";
then
_GROFFER_RUN='second';
# do not quote $_shell to allow arguments
eval exec ${_shell} "'${_GROFFER2_SH}'" '"$@"';
exit;
fi;
_GROFFER_RUN='second';
eval ${_UNSET} _shell;
eval exec "'${_GROFFER2_SH}'" '"$@"';
fi; # end of first run
if test _"${_GROFFER_RUN}"_ != _second_;
then
echo "$_GROFFER_RUN should be 'second' here." >&2
exit 1
fi;
eval ${_UNSET} _GROFFER_RUN
|
