local shell=require("shell")

local args=shell.parse(...)
if#args==0 then
io.write("Usage: which <program>\n")
return 255
end

for i=1,#args do
local result,reason=shell.resolve(args[i],"lua")

if not result then
result=shell.getAlias(args[i])
if result then
result=args[i]..": aliased to "..result
end
end

if result then
print(result)
else
io.stderr:write(args[i]..": "..reason.."\n")
return 1
end
end