drop

#!/bin/sh

# Drop server
# Copyright 2015-2019 Rivoreo

# 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 2 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.

DROP_TARGET="$HOME/drop"

set -f
set -e

[ -f /etc/drop.cfg ] && . /etc/drop.cfg

if [ $# = 2 -a "$1" = -c ]; then
	c="$2"
elif [ -n "$SSH_ORIGINAL_COMMAND" ]; then
	c="$SSH_ORIGINAL_COMMAND"
	[ -f "$HOME/.config/drop.cfg" ] && . "$HOME/.config/drop.cfg"
else
	echo "incorrect command line" 1>&2
	exit 255
fi

if printf %s "$c" | grep -Eq '^-m [0-9]+ .+'; then
	set -- $c
	mode=$2
	f="`printf %s \"$c\" | sed -r 's/^-m [0-9]+ //'`"
else
	mode=
	f="$c"
fi

if [ "$f" = . -o "$f" = .. ] || printf %s "$f" | grep -Fq /; then
	echo "invalid file name" 1>&2
	exit 1
fi

[ -d "$DROP_TARGET" ] || mkdir "$DROP_TARGET"

# XXX; need a portable way to get msec
new_file_name="`date -u +%F.%H-%M-%S`.$f"
# TODO: database
if [ -n "$mode" ]; then
	chmod -- "$mode" "$DROP_TARGET/$new_file_name" > "$DROP_TARGET/$new_file_name"
fi
exec cat > "$DROP_TARGET/$new_file_name"