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fs_rules.lua
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fs_rules.lua
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-- Copyright (C) 2007 Lauri Leukkunen <lle@rahina.org>
-- Copyright (C) 2011 Nokia Corporation.
-- Licensed under MIT license.
-- Rule file interface version, mandatory.
--
rule_file_interface_version = "105"
----------------------------------
-- use "==" to test options as long as there is only one possible option,
-- string.match() is slow..
if sbox_mode_specific_options == "use-global-tmp" then
tmp_dir_dest = "/tmp"
var_tmp_dir_dest = "/var/tmp"
else
tmp_dir_dest = session_dir .. "/tmp"
var_tmp_dir_dest = session_dir .. "/var/tmp"
end
test_first_usr_bin_default_is_bin__replace = {
{ if_exists_then_replace_by = target_root.."/usr/bin", protection = readonly_fs_always },
{ replace_by = target_root.."/bin", protection = readonly_fs_always }
}
test_first_tools_then_target_default_is_tools = {
{ if_exists_then_map_to = tools, protection = readonly_fs_always },
{ if_exists_then_map_to = target_root, protection = readonly_fs_always },
{ map_to = tools, protection = readonly_fs_always }
}
-- accelerated programs:
-- Use a binary from tools_root, if it is availabe there.
-- Fallback to target_root, if it doesn't exist in tools.
accelerated_program_actions = {
{ if_exists_then_map_to = tools, protection = readonly_fs_always },
{ map_to = target_root, protection = readonly_fs_always },
}
-- Path == "/":
rootdir_rules = {
-- Special case for /bin/pwd: Some versions don't use getcwd(),
-- but instead the use open() + fstat() + fchdir() + getdents()
-- in a loop, and that fails if "/" is mapped to target_root.
{path = "/", binary_name = "pwd", use_orig_path = true},
-- All other programs:
{path = "/",
func_class = FUNC_CLASS_STAT + FUNC_CLASS_OPEN + FUNC_CLASS_SET_TIMES,
map_to = target_root, protection = readonly_fs_if_not_root },
-- Default: Map to real root.
{path = "/", use_orig_path = true},
}
emulate_mode_rules_bin = {
{path = "/bin/sh",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/bash",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/echo",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/cp",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/rm",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/mv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/ln",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/ls",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/cat",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/egrep",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/grep",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/mkdir",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/rmdir",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/mktemp",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/chown",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/chmod",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/chgrp",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/gzip",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/sed",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/sort",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/date",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/bin/touch",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
-- rpm rules
{path = "/bin/rpm",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
-- end of rpm rules
{name = "/bin default rule", dir = "/bin", map_to = target_root,
protection = readonly_fs_if_not_root}
}
emulate_mode_rules_usr_bin = {
{path = "/usr/bin/find",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/diff",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/cmp",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/tr",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/dirname",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/basename",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/grep",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/egrep",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/bzip2",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/gzip",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/sed",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/sort",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/uniq",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/sb2-show", use_orig_path = true,
protection = readonly_fs_always},
{path = "/usr/bin/sb2-qemu-gdbserver-prepare",
use_orig_path = true, protection = readonly_fs_always},
{path = "/usr/bin/sb2-session", use_orig_path = true,
protection = readonly_fs_always},
-- rpm and zypper rules (zypper uses libsolv-tools now)
{prefix = "/usr/bin/rpm",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/zypper",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/deltainfoxml2solv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/dumpsolv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/installcheck",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/mergesolv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/repomdxml2solv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/rpmdb2solv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/rpmmd2solv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/rpms2solv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/testsolv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
{path = "/usr/bin/updateinfoxml2solv",
func_class = FUNC_CLASS_EXEC,
actions = accelerated_program_actions},
-- end of rpm rules
{name = "/usr/bin default rule", dir = "/usr/bin", map_to = target_root,
protection = readonly_fs_if_not_root}
}
emulate_mode_rules_usr = {
{name = "/usr/bin branch", dir = "/usr/bin", rules = emulate_mode_rules_usr_bin},
{path = "/usr/lib/rpm/elfdeps", func_class = FUNC_CLASS_EXEC,
actions=accelerated_program_actions},
{path = "/usr/lib/rpm/debugedit", func_class = FUNC_CLASS_EXEC,
actions=accelerated_program_actions},
{path = "/usr/lib/rpm/javadeps", func_class = FUNC_CLASS_EXEC,
actions=accelerated_program_actions},
{path = "/usr/lib/rpm/rpmdeps", func_class = FUNC_CLASS_EXEC,
actions=accelerated_program_actions},
{dir = "/usr", map_to = target_root,
protection = readonly_fs_if_not_root}
}
emulate_mode_rules_etc = {
-- Following rules are needed because package
-- "resolvconf" makes resolv.conf to be symlink that
-- points to /etc/resolvconf/run/resolv.conf and
-- we want them all to come from host.
--
{prefix = "/etc/resolvconf", force_orig_path = true,
protection = readonly_fs_always},
{path = "/etc/resolv.conf", force_orig_path = true,
protection = readonly_fs_always},
{dir = "/etc", map_to = target_root,
protection = readonly_fs_if_not_root}
}
emulate_mode_rules_var = {
-- Following rule are needed because package
-- "resolvconf" makes resolv.conf to be symlink that
-- points to /etc/resolvconf/run/resolv.conf and
-- we want them all to come from host.
--
{prefix = "/var/run/resolvconf", force_orig_path = true,
protection = readonly_fs_always},
--
{dir = "/var/tmp", replace_by = var_tmp_dir_dest},
{dir = "/var", map_to = target_root,
protection = readonly_fs_if_not_root}
}
emulate_mode_rules_home = {
-- We can't change times or attributes of the real /home
-- but must pretend to be able to do so. Redirect the path
-- to an existing, dummy location.
{path = "/home",
func_class = FUNC_CLASS_SET_TIMES,
set_path = session_dir.."/dummy_file", protection = readonly_fs_if_not_root },
-- Default: Not mapped, R/W access.
{dir = "/home", use_orig_path = true},
}
emulate_mode_rules_opt = {
{dir = "/opt", map_to = target_root,
protection = readonly_fs_if_not_root}
}
emulate_mode_rules_dev = {
-- FIXME: This rule should have "protection = eaccess_if_not_owner_or_root",
-- but that kind of protection is not yet supported.
-- We can't change times or attributes of host's devices,
-- but must pretend to be able to do so. Redirect the path
-- to an existing, dummy location.
{dir = "/dev",
func_class = FUNC_CLASS_SET_TIMES,
set_path = session_dir.."/dummy_file", protection = readonly_fs_if_not_root },
-- mknod is simulated. Redirect to a directory where
-- mknod can create the node.
-- Also, typically, rename() is used to rename nodes created by
-- mknod() (and it can't be used to rename real devices anyway)
{dir = "/dev",
func_class = FUNC_CLASS_MKNOD + FUNC_CLASS_RENAME,
map_to = session_dir, protection = readonly_fs_if_not_root },
-- Default: If a node has been created by mknod, and that was
-- simulated, use the simulated target.
-- Otherwise use real devices.
-- However, there are some devices we never want to simulate...
{path = "/dev/console", use_orig_path = true},
{path = "/dev/null", use_orig_path = true},
{prefix = "/dev/tty", use_orig_path = true},
{prefix = "/dev/fb", use_orig_path = true},
{dir = "/dev", actions = {
{ if_exists_then_map_to = session_dir },
{ use_orig_path = true }
},
},
}
proc_rules = {
-- We can't change times or attributes of host's /proc,
-- but must pretend to be able to do so. Redirect the path
-- to an existing, dummy location.
{path = "/proc",
func_class = FUNC_CLASS_SET_TIMES,
set_path = session_dir.."/dummy_file", protection = readonly_fs_if_not_root },
-- Default:
{dir = "/proc", custom_map_funct = sb2_procfs_mapper,
virtual_path = true},
}
sys_rules = {
{path = "/sys",
func_class = FUNC_CLASS_SET_TIMES,
set_path = session_dir.."/dummy_file", protection = readonly_fs_if_not_root },
{dir = "/sys", use_orig_path = true},
}
emulate_mode_rules = {
-- First paths that should never be mapped:
{dir = session_dir, use_orig_path = true},
{path = sbox_cputransparency_cmd, use_orig_path = true,
protection = readonly_fs_always},
--{dir = target_root, use_orig_path = true,
-- protection = readonly_fs_if_not_root},
{dir = target_root, use_orig_path = true,
virtual_path = true, -- don't try to reverse this
-- protection = readonly_fs_if_not_root
},
{path = os.getenv("SSH_AUTH_SOCK"), use_orig_path = true},
-- ldconfig is static binary, and needs to be wrapped
-- Gdb needs some special parameters before it
-- can be run so we wrap it.
{dir = "/sb2/wrappers",
replace_by = session_dir .. "/wrappers." .. active_mapmode,
protection = readonly_fs_always},
--
{dir = "/tmp", replace_by = tmp_dir_dest},
{dir = "/dev", rules = emulate_mode_rules_dev},
{dir = "/proc", rules = proc_rules},
{dir = "/sys", rules = sys_rules},
{dir = sbox_dir .. "/share/scratchbox2",
use_orig_path = true},
-- -----------------------------------------------
-- home directories:
{dir = "/home", rules = emulate_mode_rules_home},
-- -----------------------------------------------
{dir = "/usr", rules = emulate_mode_rules_usr},
{dir = "/bin", rules = emulate_mode_rules_bin},
{dir = "/etc", rules = emulate_mode_rules_etc},
{dir = "/var", rules = emulate_mode_rules_var},
{dir = "/opt", rules = emulate_mode_rules_opt},
{path = "/", rules = rootdir_rules},
{prefix = "/", map_to = target_root,
protection = readonly_fs_if_not_root}
}
-- This allows access to tools with full host paths,
-- this is needed for example to be able to
-- start CPU transparency from tools.
-- Used only when tools_root is set.
local tools_rules = {
{dir = tools_root, use_orig_path = true},
{prefix = "/", rules = emulate_mode_rules},
}
-- Import Mer common functions
dofile("/usr/share/scratchbox2/modes/mer-common.lua")
-- Define /parentroot as being outside, like /home
use_outside_path("/parentroot")
-- Now run ~/.sbrules
run_sbrules()
if (tools_root ~= nil) and (tools_root ~= "/") then
-- Tools root is set.
fs_mapping_rules = tools_rules
else
-- No tools_root.
fs_mapping_rules = emulate_mode_rules
end