54 lines
1.5 KiB
Lua
Executable File
54 lines
1.5 KiB
Lua
Executable File
#!/usr/bin/env lua
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--[[
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fdude.lua - wraps avrdude in an spidev resource lock
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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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local nixio = require 'nixio'
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local SPI_DEV = '/dev/spidev0.0'
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local SPI_DAEMON_PID_FILE = '/var/run/spid/pid'
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local O_RDWR_NONBLOCK = nixio.open_flags('rdwr', 'nonblock')
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local spidev = nixio.open(SPI_DEV, O_RDWR_NONBLOCK)
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local exit = 0
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if spidev:lock('tlock') then
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nixio.execp('avrdude', ...)
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else
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print(string.format('Detected a lock on %s', SPI_DEV))
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local pid = nixio.open(SPI_DAEMON_PID_FILE, O_RDWR_NONBLOCK)
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if pid then
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print(string.format('spid process is still running with pid %d', pid:read(-1)))
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exit = 1
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else
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print('spid is not running.')
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print('Could be a second avrdude still in progress.')
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exit = 2
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end
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print('Aborting...')
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end
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os.exit(exit)
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