61 lines
1.6 KiB
Lua
Executable File
61 lines
1.6 KiB
Lua
Executable File
#! /usr/bin/env lua
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--[[
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spid.lua - Lua part of the spi daemon
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Copyright (C) 2011 Bart Van Der Meerssche <bart.vandermeerssche@flukso.net>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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]]--
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require 'nixio.fs'
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ctrl_path = os.getenv('DAEMON_PATH') .. '/ctrl/'
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nixio.fs.mkdirr(ctrl_path)
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nixio.fs.unlink(ctrl_path .. 'in')
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nixio.fs.unlink(ctrl_path .. 'out')
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nixio.fs.mkfifo(ctrl_path .. 'in', '644')
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nixio.fs.mkfifo(ctrl_path .. 'out', '644')
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rdwr_nonblock = nixio.open_flags('rdwr', 'nonblock')
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ctrl_fd_in = nixio.open(ctrl_path .. 'in', rdwr_nonblock)
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ctrl_fd_out = nixio.open(ctrl_path .. 'out', rdwr_nonblock)
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pfin = nixio.poll_flags('in')
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local fd = {fd = ctrl_fd_in,
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events = pfin,
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revents = 0}
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local fds = {fd}
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ctrl_line = ctrl_fd_in:linesource()
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while true do
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if nixio.poll(fds, 1000) then
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ctrl_fd_out:write((ctrl_line() or 'nil!') .. '\n')
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else
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ctrl_fd_out:write('timeout\n')
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end
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end
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nixio.fs.unlink(ctrl_path .. 'in')
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nixio.fs.unlink(ctrl_path .. 'out')
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