lsyncd/tests/testlib.lua

-- common testing environment
require("posix")

-- escape codes to colorize output on terminal
local c1="\027[47;34m"
local c0="\027[0m"

---
-- writes colorized
--
function cwriteln(...)
	io.write(c1, ...)
	io.write(c0, "\n")
end

-----
-- creates a tmp directory
function mktempd()
	local f = io.popen('mktemp -d --tmpdir ltest.XXX', 'r')
	local s = f:read('*a')
	f:close()
	s = s:gsub('[\n\r]+', ' ')
	s = s:match("^%s*(.-)%s*$")
	return s
end

-----
-- spawns a subprocess.
--
-- @returns the processes pid
--
function spawn(...)
	args = {...}
	cwriteln("spawning: ", table.concat(args, " "))
	local pid = posix.fork()
	if pid < 0 then
		cwriteln("Error, failed fork!")
		os.exit(-1)
	end
	if pid == 0 then
		posix.exec(...)
		-- should not return
		cwriteln("Error, failed to spawn: ", ...)
		os.exit(-1);
	end
	return pid
end