forked from Hyperion/HyperionOS
73 lines
1.7 KiB
Plaintext
73 lines
1.7 KiB
Plaintext
--:Minify:--
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local fs = require("sys.fs")
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local targetUser = ({...})[1] or "root"
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local currentUid = syscall.getuid()
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local currentUser = syscall.getUsername(currentUid) or tostring(currentUid)
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local targetUid = syscall.auth_getuid(targetUser)
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if not targetUid then
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print("su: user '" .. targetUser .. "' does not exist")
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syscall.exit(1)
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return
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end
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local ok, err
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if currentUid == 0 then
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ok = true
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else
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printInline("Password: ")
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local pw = ""
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while true do
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local ch = syscall.read(0)
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if not ch or ch == "" then
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elseif ch == "\n" then
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syscall.write(1, "\n")
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break
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elseif ch == "\b" then
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if #pw > 0 then pw = pw:sub(1, -2); syscall.write(1, "\b \b") end
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else
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pw = pw .. ch
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syscall.write(1, "*")
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end
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end
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ok, err = syscall.auth_elevate(targetUser, pw)
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if not ok then
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sleep(1)
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print("su: Authentication failure")
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syscall.exit(1)
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return
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end
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end
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if currentUid == 0 then
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syscall.setuid(targetUid)
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end
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local pwent = syscall.auth_getpasswd(targetUid)
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local shell = (pwent and pwent.shell) or "/bin/hysh"
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local homedir = (pwent and pwent.homedir) or "/"
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syscall.chdir(homedir)
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syscall.setEnviron("HOME", homedir)
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syscall.setEnviron("USER", targetUser)
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syscall.setEnviron("SHELL", shell)
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local shellText = fs.readAllText(shell)
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if not shellText then
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print("su: shell not found: " .. shell)
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syscall.exit(1)
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return
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end
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local shellFn, loadErr = load(shellText, "@" .. shell)
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if not shellFn then
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print("su: cannot load shell: " .. tostring(loadErr))
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syscall.exit(1)
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return
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end
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shellFn()
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