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---
-- SPDX-License-Identifier: BSD-2-Clause
--
-- Copyright(c) 2022 Baptiste Daroussin <bapt@FreeBSD.org>
local unistd = require("posix.unistd")
local sys_stat = require("posix.sys.stat")
local lfs = require("lfs")
local function warnmsg(str, prepend)
if not str then
return
end
local tag = ""
if prepend ~= false then
tag = "nuageinit: "
end
io.stderr:write(tag .. str .. "\n")
end
local function errmsg(str, prepend)
warnmsg(str, prepend)
os.exit(1)
end
local function dirname(oldpath)
if not oldpath then
return nil
end
local path = oldpath:gsub("[^/]+/*$", "")
if path == "" then
return nil
end
return path
end
local function mkdir_p(path)
if lfs.attributes(path, "mode") ~= nil then
return true
end
local r, err = mkdir_p(dirname(path))
if not r then
return nil, err .. " (creating " .. path .. ")"
end
return lfs.mkdir(path)
end
local function sethostname(hostname)
if hostname == nil then
return
end
local root = os.getenv("NUAGE_FAKE_ROOTDIR")
if not root then
root = ""
end
local hostnamepath = root .. "/etc/rc.conf.d/hostname"
mkdir_p(dirname(hostnamepath))
local f, err = io.open(hostnamepath, "w")
if not f then
warnmsg("Impossible to open " .. hostnamepath .. ":" .. err)
return
end
f:write('hostname="' .. hostname .. '"\n')
f:close()
end
local function splitlist(list)
local ret = {}
if type(list) == "string" then
for str in list:gmatch("([^, ]+)") do
ret[#ret + 1] = str
end
elseif type(list) == "table" then
ret = list
else
warnmsg("Invalid type " .. type(list) .. ", expecting table or string")
end
return ret
end
local function adduser(pwd)
if (type(pwd) ~= "table") then
warnmsg("Argument should be a table")
return nil
end
local root = os.getenv("NUAGE_FAKE_ROOTDIR")
local cmd = "pw "
if root then
cmd = cmd .. "-R " .. root .. " "
end
local f = io.popen(cmd .. " usershow " .. pwd.name .. " -7 2> /dev/null")
local pwdstr = f:read("*a")
f:close()
if pwdstr:len() ~= 0 then
return pwdstr:match("%a+:.+:%d+:%d+:.*:(.*):.*")
end
if not pwd.gecos then
pwd.gecos = pwd.name .. " User"
end
if not pwd.homedir then
pwd.homedir = "/home/" .. pwd.name
end
local extraargs = ""
if pwd.groups then
local list = splitlist(pwd.groups)
extraargs = " -G " .. table.concat(list, ",")
end
-- pw will automatically create a group named after the username
-- do not add a -g option in this case
if pwd.primary_group and pwd.primary_group ~= pwd.name then
extraargs = extraargs .. " -g " .. pwd.primary_group
end
if not pwd.no_create_home then
extraargs = extraargs .. " -m "
end
if not pwd.shell then
pwd.shell = "/bin/sh"
end
local precmd = ""
local postcmd = ""
local input = nil
if pwd.passwd then
input = pwd.passwd
postcmd = " -H 0"
elseif pwd.plain_text_passwd then
input = pwd.plain_text_passwd
postcmd = " -h 0"
end
cmd = precmd .. "pw "
if root then
cmd = cmd .. "-R " .. root .. " "
end
cmd = cmd .. "useradd -n " .. pwd.name .. " -M 0755 -w none "
cmd = cmd .. extraargs .. " -c '" .. pwd.gecos
cmd = cmd .. "' -d '" .. pwd.homedir .. "' -s " .. pwd.shell .. postcmd
local f = io.popen(cmd, "w")
if input then
f:write(input)
end
local r = f:close(cmd)
if not r then
warnmsg("fail to add user " .. pwd.name)
warnmsg(cmd)
return nil
end
if pwd.locked then
cmd = "pw "
if root then
cmd = cmd .. "-R " .. root .. " "
end
cmd = cmd .. "lock " .. pwd.name
os.execute(cmd)
end
return pwd.homedir
end
local function addgroup(grp)
if (type(grp) ~= "table") then
warnmsg("Argument should be a table")
return false
end
local root = os.getenv("NUAGE_FAKE_ROOTDIR")
local cmd = "pw "
if root then
cmd = cmd .. "-R " .. root .. " "
end
local f = io.popen(cmd .. " groupshow " .. grp.name .. " 2> /dev/null")
local grpstr = f:read("*a")
f:close()
if grpstr:len() ~= 0 then
return true
end
local extraargs = ""
if grp.members then
local list = splitlist(grp.members)
extraargs = " -M " .. table.concat(list, ",")
end
cmd = "pw "
if root then
cmd = cmd .. "-R " .. root .. " "
end
cmd = cmd .. "groupadd -n " .. grp.name .. extraargs
local r = os.execute(cmd)
if not r then
warnmsg("fail to add group " .. grp.name)
warnmsg(cmd)
return false
end
return true
end
local function addsshkey(homedir, key)
local chownak = false
local chowndotssh = false
local root = os.getenv("NUAGE_FAKE_ROOTDIR")
if root then
homedir = root .. "/" .. homedir
end
local ak_path = homedir .. "/.ssh/authorized_keys"
local dotssh_path = homedir .. "/.ssh"
local dirattrs = lfs.attributes(ak_path)
if dirattrs == nil then
chownak = true
dirattrs = lfs.attributes(dotssh_path)
if dirattrs == nil then
assert(lfs.mkdir(dotssh_path))
chowndotssh = true
dirattrs = lfs.attributes(homedir)
end
end
local f = io.open(ak_path, "a")
if not f then
warnmsg("impossible to open " .. ak_path)
return
end
f:write(key .. "\n")
f:close()
if chownak then
sys_stat.chmod(ak_path, 384)
unistd.chown(ak_path, dirattrs.uid, dirattrs.gid)
end
if chowndotssh then
sys_stat.chmod(dotssh_path, 448)
unistd.chown(dotssh_path, dirattrs.uid, dirattrs.gid)
end
end
local n = {
warn = warnmsg,
err = errmsg,
dirname = dirname,
mkdir_p = mkdir_p,
sethostname = sethostname,
adduser = adduser,
addgroup = addgroup,
addsshkey = addsshkey
}
return n
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