50 lines
1.1 KiB
Bash
50 lines
1.1 KiB
Bash
#!/bin/sh
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# env
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# Written in 2019 by Lucas
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# CC0 1.0 Universal/Public domain - No rights reserved
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#
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# To the extent possible under law, the author(s) have dedicated all
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# copyright and related and neighboring rights to this software to the
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# public domain worldwide. This software is distributed without any
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# warranty. You should have received a copy of the CC0 Public Domain
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# Dedication along with this software. If not, see
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# <http://creativecommons.org/publicdomain/zero/1.0/>.
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usage() {
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printf "Usage: %s [-T] rfc-number\n" "${0##*/}" >&2
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exit 1
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}
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tonumber() {
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printf "%u" "$1" 2>/dev/null
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}
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: ${RFCDIR:=~/doc/rfc}
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torsocks=torsocks
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while getopts T flag; do
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case $flag in
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T) torsocks=
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;;
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*) usage
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;;
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esac
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done
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shift $(($OPTIND - 1))
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if [ $# -ne 1 ] || [ -z "$1" ] || ! n=$(tonumber "$1"); then
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usage
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fi
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rfcfile=$RFCDIR/rfc$n.txt
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url=https://tools.ietf.org/rfc/rfc$n.txt
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mkdir -p "$RFCDIR"
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if [ ! -f "$rfcfile" ]; then
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if ! $torsocks ftp -Vo "$rfcfile" "$url"; then
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printf "%s: Couldn't fetch RFC %u\n" "${0##*/}" "$n" >&2
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exit 1
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fi
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fi
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${PAGER:-more} "$rfcfile"
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