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Diffstat (limited to 'src/roff/nroff/nroff.sh')
| -rw-r--r-- | src/roff/nroff/nroff.sh | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/roff/nroff/nroff.sh b/src/roff/nroff/nroff.sh new file mode 100644 index 0000000..77f5c06 --- /dev/null +++ b/src/roff/nroff/nroff.sh @@ -0,0 +1,204 @@ +#! /bin/sh +# Emulate nroff with groff. +# +# Copyright (C) 1992-2021 Free Software Foundation, Inc. +# +# Written by James Clark, Werner Lemberg, and G. Branden Robinson. +# +# This file is part of 'groff'. +# +# 'groff' is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License (GPL) as published +# by the Free Software Foundation, either version 3 of the License, 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 this program. If not, see <http://www.gnu.org/licenses/>. + +prog="$0" + +T= +Topt= +opts= +dry_run= +is_option_argument_pending= + +usage="usage: $prog [-bcCEhikpRStUVz] [-d ctext] [-d string=text] \ +[-K fallback-encoding] [-m macro-package] [-M macro-directory] \ +[-n page-number] [-o page-list] [-P postprocessor-argument] \ +[-r cnumeric-expression] [-r register=numeric-expression] \ +[-T output-device] [-w warning-category] [-W warning-category] \ +[file ...] +usage: $prog {-v | --version} +usage: $prog --help" + +for arg +do + if [ -n "$is_option_argument_pending" ] + then + is_option_argument_pending= + opts="$opts $arg" + shift + continue + fi + + case $arg in + -c) + opts="$opts $arg -P-c" ;; + -h) + opts="$opts -P-h" ;; + -[eq] | -s*) + # ignore these options + ;; + -[dKmMnoPrTwW]) + is_option_argument_pending=yes + opts="$opts $arg" ;; + -[bCEikpRStUz] | -[dKMmrnoPwW]*) + opts="$opts $arg" ;; + -T*) + Topt=$arg ;; + -u*) + # -u is for Solaris compatibility and not otherwise documented. + # + # Solaris 2.2 through at least Solaris 9 'man' invokes + # 'nroff -u0 ... | col -x'. Ignore the -u0, since 'less' and + # 'more' can use the emboldening info. But disable SGR, since + # Solaris 'col' mishandles it. + opts="$opts -P-c" ;; + -V) + dry_run=yes ;; + -v | --version) + echo "GNU nroff (groff) version @VERSION@" + opts="$opts $arg" ;; + --help) + echo "$usage" + exit 0 ;; + --) + shift + break ;; + -) + break ;; + -*) + echo "$prog: usage error: invalid option '$arg'" >&2 + echo "$usage" >&2 + exit 2 ;; + *) + break ;; + esac + shift +done + +if [ -n "$is_option_argument_pending" ] +then + echo "$prog: usage error: option '$arg' requires an argument" >&2 + exit 2 +fi + +# Determine the -T option. Was a valid one specified? +case "$Topt" in + -Tascii | -Tlatin1 | -Tutf8 | -Tcp1047) + T=$Topt ;; +esac + +# -T option absent or invalid; try environment. +if [ -z "$T" ] +then + Tenv=-T$GROFF_TYPESETTER + case "$Tenv" in + -Tascii | -Tlatin1 | -Tutf8 | -Tcp1047) + T=$Tenv ;; + esac +fi + +# Finally, infer a -T option from the locale. Try 'locale charmap' +# first because it is the most reliable, then look at environment +# variables. +if [ -z "$T" ] +then + # The separate `exec` is to work around a ~2004 bug in Cygwin sh.exe. + case "`exec 2>/dev/null ; locale charmap`" in + UTF-8) + Tloc=utf8 ;; + ISO-8859-1 | ISO-8859-15) + Tloc=latin1 ;; + IBM-1047) + Tloc=cp1047 ;; + *) + # Some old shells don't support ${FOO:-bar} expansion syntax. We + # should switch to it when it is safe to abandon support for them. + case "${LC_ALL-${LC_CTYPE-${LANG}}}" in + *.UTF-8) + Tloc=utf8 ;; + iso_8859_1 | *.ISO-8859-1 | *.ISO8859-1 | \ + iso_8859_15 | *.ISO-8859-15 | *.ISO8859-15) + Tloc=latin1 ;; + *.IBM-1047) + Tloc=cp1047 ;; + *) + case "$LESSCHARSET" in + utf-8) + Tloc=utf8 ;; + latin1) + Tloc=latin1 ;; + cp1047) + Tloc=cp1047 ;; + *) + Tloc=ascii ;; + esac ;; + esac ;; + esac + T=-T$Tloc +fi + +# Load nroff-style character definitions too. +opts="-mtty-char$opts" + +# Set up the 'GROFF_BIN_PATH' variable to be exported in the current +# 'GROFF_RUNTIME' environment. +@GROFF_BIN_PATH_SETUP@ +export GROFF_BIN_PATH + +# Let our test harness redirect us. See LC_ALL comment above. +groff=${GROFF_TEST_GROFF-groff} + +# Note 1: It would be nice to apply the DRY ("Don't Repeat Yourself") +# principle here and store the entire command string to be executed into +# a variable, and then either display it or execute it. For example: +# +# cmd="PATH=... groff ... $@" +# ... +# printf "%s\n" "$cmd" +# ... +# eval $cmd +# +# Unfortunately, the shell is a nightmarish hellscape of quoting issues. +# Naïve attempts to solve the problem fail when arguments to nroff +# contain embedded whitespace or shell metacharacters. The solution +# below works with those, but there is insufficient quoting in -V (dry +# run) mode, such that you can't copy-and-paste the output of 'nroff -V' +# if you pass it a filename like foo"bar (with the embedded quotation +# mark) and expect it to run without further quoting. +# +# If POSIX adopts Bash's ${var@Q} or an equivalent, this issue can be +# revisited. +# +# Note 2: The construction '${1+"@$"}' preserves the absence of +# arguments in old shells; see "Shell Substitutions" in the GNU Autoconf +# manual. We don't want 'nroff' to become 'groff ... ""' if $# equals +# zero. +if [ -n "$dry_run" ] +then + echo PATH="$GROFF_RUNTIME$PATH" $groff $T $opts ${1+"$@"} +else + PATH="$GROFF_RUNTIME$PATH" $groff $T $opts ${1+"$@"} +fi + +# Local Variables: +# fill-column: 72 +# End: +# vim: set autoindent expandtab shiftwidth=2 softtabstop=2 textwidth=72: |