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#!/bin/sh
# Copyright (C) 2021 June McEnroe <june@causal.agency>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
set -eu
die() {
echo "$@" >&2
exit 1
}
system=${1:-}
[ -n "${system}" ] || die 'What system do you want?'
shift
export MANPATH="%%EXMANDIR%%/${system}"
[ -d "${MANPATH}" ] || die "No manuals for ${system}"
export MANSECT
for sect in "${MANPATH}"/man*/; do
sect=${sect%/}
sect=${sect##*/man}
MANSECT="${MANSECT:-}${MANSECT:+:}${sect}"
done
# macOS man(1) refuses to search in directories such as "man3p", so do it
# manually here unless there are other flags passed.
hack() {
case "${1:-}" in
(-*) exec man "$@";;
([0-9]*) MANSECT=$1; shift;;
esac
[ $# -gt 0 ] || die 'What manual page do you want?'
for page in "$@"; do
found=0
IFS=:
for sect in $MANSECT; do
path="${MANPATH}/man${sect}/${page}"
for ext in ".${sect}" ".${sect}.gz"; do
[ -f "${path}${ext}" ] || continue
man "${path}${ext}"
found=1
break
done
[ $found -eq 0 ] || break
done
[ $found -ne 0 ] || die "No manual entry for ${page}"
done
}
if [ "$(uname)" = 'Darwin' ]; then
hack "$@"
else
exec man "$@"
fi
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