diff options
| -rw-r--r-- | Makefile.am | 4 | ||||
| -rwxr-xr-x | tools/shld.sh | 157 | ||||
| -rwxr-xr-x | tools/shpp.sh | 173 |
3 files changed, 333 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am index b2e117d..a68753a 100644 --- a/Makefile.am +++ b/Makefile.am @@ -43,7 +43,9 @@ EXTRA_DIST = \ $(pkgdatacmd_sources) \ $(man1_sources) \ $(locale_sources) \ - $(tests) + $(tests) \ + tools/shpp.sh \ + tools/shld.sh SUFFIXES = .sh .sm .1in .1 .ms diff --git a/tools/shld.sh b/tools/shld.sh new file mode 100755 index 0000000..e1dff5f --- /dev/null +++ b/tools/shld.sh @@ -0,0 +1,157 @@ +#!/bin/sh +# +# Shell command language linker +# +# Copyright (C) 2015 Patrick "P. J." McDermott +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +set -u + +VERSION='0.1.0' + +output='out.sh' +make_executable=true +interpreter='/bin/sh' +entry_point='main' + +die() +{ + local fmt="${1}" + shift 1 + + printf "shld: ${fmt}\n" "${@}" >&2 + exit 2 +} + +link() +{ + local input= + + # Open output file. + if ! exec 3>"${output}~"; then + die 'Cannot open file "%s"' "${output}~" + fi + + # Write magic number and interpreter path. + if ${make_executable}; then + printf '#!%s\n' "${interpreter}" >&3 + fi + + # Write __init() function. + cat >&3 <<-'EOF' + __init_funcs='' + __init() + { + __init_funcs="${__init_funcs} ${1}" + } + EOF + + # Read input files. + for input in "${@}"; do + if ! cat "${input}" >&3; then + die 'Cannot read file "%s"' "${input}" + fi + done + + # Add call to init functions. + cat >&3 <<-'EOF' + for __func in ${__init_funcs}; do + ${__func} + done + EOF + + # Add call to entry point. + if ${make_executable}; then + printf '%s "${@}"\n' "${entry_point}" >&3 + fi + + # Close output file, make it executable, and set its name. + exec 3>&- + if ${make_executable}; then + if ! chmod a+x "${output}~"; then + die 'Cannot set mode of file "%s"' "${output}~" + fi + fi + if ! mv "${output}~" "${output}"; then + die 'Cannot rename file to "%s"' "${output}" + fi +} + +usage() +{ + printf 'Usage: %s [option ...] <file>...\n' "${0}" +} + +help() +{ + usage + cat <<EOF +Options: + -h Display this information + -V Display linker version information + -I <interp> Use <interp> as the interpreter for your program, instead of the + default of "/bin/sh" + -e <entry> Use <entry> as the function for beginning execution of your + program, instead of the default of "main" + -o <output> Use <output> as the name of the program produced by shld, instead + of the default of "out.sh" +EOF +} + +version() +{ + cat <<EOF +shld ${VERSION} +Copyright (C) 2015 Patrick "P. J." McDermott +License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. +EOF +} + +main() +{ + while getopts 'hVI:e:o:' opt; do + case "${opt}" in + 'h') + help + exit + ;; + 'V') + version + exit + ;; + 'I') + interpreter="${OPTARG}" + ;; + 'e') + entry_point="${OPTARG}" + ;; + 'o') + output="${OPTARG}" + ;; + esac + done + shift $(($OPTIND - 1)) + + if [ ${#} -lt 1 ]; then + usage >&2 + exit 1 + fi + + link "${@}" +} + +main "${@}" diff --git a/tools/shpp.sh b/tools/shpp.sh new file mode 100755 index 0000000..fc23a52 --- /dev/null +++ b/tools/shpp.sh @@ -0,0 +1,173 @@ +#!/bin/sh +# +# Shell command language preprocessor +# +# Copyright (C) 2015 Patrick "P. J." McDermott +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +set -u + +VERSION='0.1.0' +FS="$(printf '\034')" + +die() +{ + local fmt="${1}" + shift 1 + + printf "shpp: ${fmt}\n" "${@}" >&2 + exit 2 +} + +error() +{ + local fmt="${1}" + shift 1 + + printf "shpp: ${fmt}\n" "${@}" >&2 +} + +preprocess() +{ + local vars="${1}" + local input="${2}" + local output="${3}" + local def= + local var= + local val= + + # Open output file. + if [ "x${output}" = 'x-' ]; then + if ! exec 3>&1; then + die 'Cannot duplicate output file descriptor' + fi + else + if ! exec 3>"${outfile}~"; then + die 'Cannot open file "%s"' "${output}~" + fi + fi + + IFS="${FS}" + for def in ${vars}; do + case "${def}" in + *=*) + var="${def%%=*}" + val="${def#*=}" + ;; + *) + var="${def%%=*}" + val='true' + ;; + esac + case "${var}" in + *[!A-Za-z0-9_]*) + error 'Invalid variable name "%s"' "${var}" + continue + ;; + [0-9]*) + error 'Invalid variable name "%s"' "${var}" + continue + ;; + esac + printf "%s='" "${var}" >&3 + printf '%s' "${val}" | sed "s/'/'\\\\''/g" >&3 + printf "'\n" >&3 + done + unset IFS + + # Read input file. + if ! cat "${input}" >&3; then + die 'Cannot read file "%s"' "${input}" + fi + + # Close output file, make it executable, and set its name. + if ! [ "x${output}" = 'x-' ]; then + exec 3>&- + if ! mv "${output}~" "${output}"; then + die 'Cannot rename file to "%s"' "${output}" + fi + fi +} + +usage() +{ + printf 'Usage: %s [option ...] <infile> [<outfile>]\n' "${0}" +} + +help() +{ + usage + cat <<EOF +Options: + -h Display this information + -V Display preprocessor version information + -D <var>[=<val>] Predefine <var> as a variable with value <val> (default + "true") +EOF +} + +version() +{ + cat <<EOF +shpp ${VERSION} +Copyright (C) 2015 Patrick "P. J." McDermott +License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. +EOF +} + +main() +{ + local opt= + local vars= + local infile= + local outfile= + + while getopts 'hVD:' opt; do + case "${opt}" in + 'h') + help + exit + ;; + 'V') + version + exit + ;; + 'D') + vars="${vars}${OPTARG}${FS}" + ;; + esac + done + shift $(($OPTIND - 1)) + + case ${#} in + 1) + infile="${1}" + outfile='-' + ;; + 2) + infile="${1}" + outfile="${2}" + ;; + *) + usage >&2 + exit 1 + esac + + preprocess "${vars}" "${infile}" "${outfile}" +} + +main "${@}" |