76 lines
1.6 KiB
Lua
76 lines
1.6 KiB
Lua
local component, computer = component, computer
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local vfs = {}
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local mounts = {}
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local function path_split(path)
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local parts = {}
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for m in path:gmatch("/(.+)") do
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if (m ~= "") then
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parts[#parts+1] = m
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end
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end
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return parts
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end
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local function t_compare(t1, t2)
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if (#t2 > #t1) then return false end
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for i=1, #t2 do
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if t1[i] ~= t2[i] then
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return false
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end
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end
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return true
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end
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function vfs.init()
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local tmp = component.proxy(computer.tmpAddress())
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mounts[1] = {
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path = "/",
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parts = {"/"},
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proxy = tmp
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}
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for fs in component.list("filesystem") do
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if (fs ~= tmp.address) then
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local name = fs:sub(1, 6)
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tmp.makeDirectory(name)
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vfs.mount("/"..name, component.proxy(fs))
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end
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end
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tmp.makeDirectory("tmp")
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end
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function vfs.mount(mountpoint, proxy)
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local parts = path_split(mountpoint)
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mounts[#mounts+1] = {path=mountpoint, parts=parts, proxy=proxy}
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end
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function vfs.resolve(path)
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local path_parts = path_split(path)
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local real_parts = {}
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for i=1, #path_parts do
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if (path_parts[i] == "..") then
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real_parts[#real_parts] = nil
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elseif (path_parts[i] ~= ".") then
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real_parts[#real_parts+1] = path_parts[i]
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end
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end
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path = "/"..table.concat(real_parts, "/")
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local search_mounts = {}
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for i=1, #mounts do
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if (path:sub(1, #mounts[i].path) == mounts[i].path) then
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search_mounts[#search_mounts+1] = mounts[i]
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end
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end
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table.sort(search_mounts, function(a, b)
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return #a.parts > #b.parts
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end)
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for i=1, #search_mounts do
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if (t_compare(real_parts, search_mounts[i].parts)) then
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return search_mounts[i].proxy, path:sub(#search_mounts[i].path+1)
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end
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end
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return nil, "not found"
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end
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return vfs |