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# SPDX-License-Identifier: GPL-2.0-only
########################################################################
#
# (C) Copyright 2020-2022, Alejandro Colomar
# These functions are free software; you can redistribute them and/or
# modify them under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2.
#
# These functions are distributed in the hope that they 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
# (http://www.gnu.org/licenses/gpl-2.0.html).
#
########################################################################
########################################################################
# Exit status
EX_USAGE=64;
########################################################################
# C
# sed_rm_ccomments() removes C comments.
# It can't handle mixed //... and /*...*/ comments.
# Use as a filter (see man_lsfunc() in this file).
sed_rm_ccomments()
{
perl -p -e 's%/\*.*?\*/%%g' \
|sed -E '\%/\*%, \%\*/% {\%(\*/|/\*)%!d}' \
|sed -E '\%/\*% {s%/\*.*%%; n; s%.*\*/%%;}' \
|sed -E '\%/\*% {s%/\*.*%%; n; s%.*\*/%%;}' \
|sed 's%//.*%%';
}
########################################################################
# Linux man-pages
# man_section() prints specific manual page sections (DESCRIPTION, SYNOPSIS,
# ...) of all manual pages in a directory (or in a single manual page file).
# Usage example: .../man-pages$ man_section man2 SYNOPSIS 'SEE ALSO';
man_section()
{
if [ $# -lt 2 ]; then
>&2 echo "Usage: ${FUNCNAME[0]} <dir> <section>...";
return $EX_USAGE;
fi
local page="$1";
shift;
local sect="$*";
find "$page" -type f \
|xargs wc -l \
|grep -v -e '\b1 ' -e '\btotal\b' \
|awk '{ print $2 }' \
|sort \
|while read -r manpage; do
(sed -n '/^\.TH/,/^\.SH/{/^\.SH/!p}' <"$manpage";
for s in $sect; do
<"$manpage" \
sed -n \
-e "/^\.SH $s/p" \
-e "/^\.SH $s/,/^\.SH/{/^\.SH/!p}";
done;) \
|mandoc -Tutf8 2>/dev/null \
|col -pbx;
done;
}
# man_lsfunc() prints the name of all C functions declared in the SYNOPSIS
# of all manual pages in a directory (or in a single manual page file).
# Each name is printed in a separate line
# Usage example: .../man-pages$ man_lsfunc man2;
man_lsfunc()
{
if [ $# -lt 1 ]; then
>&2 echo "Usage: ${FUNCNAME[0]} <manpage|manNdir>...";
return $EX_USAGE;
fi
for arg in "$@"; do
man_section "$arg" 'SYNOPSIS';
done \
|sed_rm_ccomments \
|pcregrep -Mn '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]*?(...)?\s*\); *$' \
|grep '^[0-9]' \
|sed -E 's/syscall\(SYS_(\w*),?/\1(/' \
|sed -E 's/^[^(]+ \**(\w+)\(.*/\1/' \
|uniq;
}
# man_lsvar() prints the name of all C variables declared in the SYNOPSIS
# of all manual pages in a directory (or in a single manual page file).
# Each name is printed in a separate line
# Usage example: .../man-pages$ man_lsvar man3;
man_lsvar()
{
if [ $# -lt 1 ]; then
>&2 echo "Usage: ${FUNCNAME[0]} <manpage|manNdir>...";
return $EX_USAGE;
fi
for arg in "$@"; do
man_section "$arg" 'SYNOPSIS';
done \
|sed_rm_ccomments \
|pcregrep -Mv '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]+?(...)?\s*\); *$' \
|pcregrep -Mn \
-e '(?s)^ +extern [\w ]+ \**\(\*+[\w ]+\)\([\w\s(,)[\]*]+?\s*\); *$' \
-e '^ +extern [\w ]+ \**[\w ]+; *$' \
|grep '^[0-9]' \
|grep -v 'typedef' \
|sed -E 's/^[0-9]+: +extern [^(]+ \**\(\*+(\w* )?(\w+)\)\(.*/\2/' \
|sed 's/^[0-9]\+: \+extern .* \**\(\w\+\); */\1/' \
|uniq;
}
# pdfman() renders a manual page in PDF
# Usage example: .../man-pages$ pdfman man2/membarrier.2;
pdfman()
{
if [ $# -eq 0 ]; then
>&2 echo "Usage: ${FUNCNAME[0]} [man(1) options] [section] page";
return $EX_USAGE;
fi;
local tmp="$(mktemp -t "${!###*/}.XXXXXX")";
man -Tps "$@" \
|ps2pdf - - \
>"$tmp";
xdg-open "$tmp";
}
# man_gitstaged prints a list of all files with changes staged for commit
# (basename only if the files are within <man?/>), separated by ", ".
# Usage example: .../man-pages$ git commit -m "$(man_gitstaged): msg";
man_gitstaged()
{
git diff --staged --name-only \
|sed 's/$/, /' \
|sed 's%.*/%%' \
|tr -d '\n' \
|sed 's/, $//'
}
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