121 lines
3.4 KiB
Plaintext
121 lines
3.4 KiB
Plaintext
--:Minify:--
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local kernel = ...
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local P = kernel.vfs.P
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local PERM = kernel.vfs.PERM
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local RW_R_R = P.OWNER_R + P.OWNER_W + P.GROUP_R + P.WORLD_R
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local RWX_RX_RX = P.OWNER_R + P.OWNER_W + P.OWNER_X
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+ P.GROUP_R + P.GROUP_X
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+ P.WORLD_R + P.WORLD_X
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local RW_R__ = P.OWNER_R + P.OWNER_W + P.GROUP_R
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local RW____ = P.OWNER_R + P.OWNER_W
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local RWXRWXRWX = PERM.RWXRWXRWX
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local SUID_755 = PERM.SUID_755
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local META_VERSION = 0x02
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local rootDisk = kernel.disks["$"]
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local function makeEntry(name, etype, owner, group, perms, cmeta)
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cmeta = cmeta or ""
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local plo = perms % 256
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local phi = math.floor(perms / 256) % 256
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local olo = (owner or 0) % 256
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local ohi = math.floor((owner or 0) / 256) % 256
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local glo = (group or 0) % 256
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local ghi = math.floor((group or 0) / 256) % 256
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return string.char(#name) .. name
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.. string.char(etype, olo, ohi, glo, ghi, plo, phi)
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.. string.char(#cmeta) .. cmeta
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end
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local REG = 0x00
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local function mergeMeta(dir, entries)
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local diskDir = dir
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if diskDir:sub(1,1) == "/" then diskDir = diskDir:sub(2) end
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local metaPath = (diskDir == "" and ".meta" or diskDir .. "/.meta")
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local existing = {}
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local rok, rf = pcall(function() return rootDisk:open(metaPath, "r") end)
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if rok and rf then
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local raw = rf.read(65535)
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if rf.close then rf.close() end
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existing = (kernel.vfs._parseMetafile and kernel.vfs._parseMetafile(raw)) or {}
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end
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for _, e in ipairs(entries) do
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local name = e[1]
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local etype = e[2] or REG
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local owner = e[3] or 0
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local group = e[4] or 0
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local perms = e[5] or RWX_RX_RX
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local cmeta = e[6] or ""
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existing[name] = {
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etype = etype,
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owner = owner,
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group = group,
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perms = perms,
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cmeta = cmeta,
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}
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end
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local data = string.char(META_VERSION)
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for name, m in pairs(existing) do
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data = data .. makeEntry(
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name,
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m.etype or REG,
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m.owner or 0,
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m.group or 0,
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m.perms or RWX_RX_RX,
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m.cmeta or ""
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)
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end
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local ok, err = pcall(function()
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local f = rootDisk:open(metaPath, "w")
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f.write(data)
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f.close()
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end)
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if not ok then
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kernel.log("permissions: failed to write " .. metaPath .. ": " .. tostring(err), "WARN", 8)
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end
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end
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if kernel.firstBoot then
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kernel.log("Seeding filesystem permissions...")
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mergeMeta("/", {
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{"bin", REG, 0, 0, RWX_RX_RX},
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{"boot", REG, 0, 0, RWX_RX_RX},
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{"dev", REG, 0, 0, RWXRWXRWX},
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{"etc", REG, 0, 0, RWX_RX_RX},
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{"home", REG, 0, 0, RWX_RX_RX},
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{"lib", REG, 0, 0, RWX_RX_RX},
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{"root", REG, 0, 0, RW____ },
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{"sbin", REG, 0, 0, RWX_RX_RX},
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{"tmp", REG, 0, 0, RWXRWXRWX},
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{"usr", REG, 0, 0, RWX_RX_RX},
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{"var", REG, 0, 0, RWXRWXRWX},
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{"opt", REG, 0, 0, RWX_RX_RX},
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})
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mergeMeta("/bin", {
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{"login", REG, 0, 0, SUID_755 },
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{"su", REG, 0, 0, SUID_755 },
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{"sudo", REG, 0, 0, SUID_755 },
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})
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mergeMeta("/etc", {
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{"passwd", REG, 0, 0, RW_R_R },
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{"shadow", REG, 0, 0, RW____ },
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{"pam.d", REG, 0, 0, RW____ },
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})
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mergeMeta("/etc/pam.d", {
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{"secret", REG, 0, 0, RW____},
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})
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kernel.log("Filesystem permissions seeded.")
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end
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