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92 lines
2.8 KiB
92 lines
2.8 KiB
package oz
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"syscall"
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)
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type Config struct {
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ProfileDir string `json:"profile_dir" desc:"Directory containing the sandbox profiles"`
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ShellPath string `json:"shell_path" desc:"Path of the shell using when entering a sandbox"`
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InitPath string `json:"init_path" desc:"Path to the 'oz-init' binary"`
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ClientPath string `json:"client_path" desc:"Path to the 'oz' client binary "`
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SandboxPath string `json:"sandbox_path" desc:"Path of the sandboxes base"`
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BridgeMACAddr string `json:"bridge_mac" desc:"MAC Address of the bridge interface"`
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DivertSuffix string `json:"divert_suffix" desc:"Suffix using for dpkg-divert of application executables"`
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NMIgnoreFile string `json:"nm_ignore_file" desc:"Path to the NetworkManager ignore config file"`
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UseFullDev bool `json:"use_full_dev" desc:"Give sandboxes full access to devices instead of a restricted set"`
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AllowRootShell bool `json:"allow_root_shell" desc:"Allow entering a sandbox shell as root"`
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LogXpra bool `json:"log_xpra" desc:"Log output of Xpra"`
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EnvironmentVars []string `json:"environment_vars" desc:"Default environment variables passed to sandboxes"`
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}
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const OzVersion = "0.0.1"
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const DefaultConfigPath = "/etc/oz/oz.conf"
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func NewDefaultConfig() *Config {
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return &Config{
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ProfileDir: "/var/lib/oz/cells.d",
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ShellPath: "/bin/bash",
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InitPath: "/usr/local/bin/oz-init",
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ClientPath: "/usr/local/bin/oz",
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SandboxPath: "/srv/oz",
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NMIgnoreFile: "/etc/NetworkManager/conf.d/oz.conf",
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BridgeMACAddr: "6A:A8:2E:56:E8:9C",
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DivertSuffix: "unsafe",
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UseFullDev: false,
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AllowRootShell: false,
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LogXpra: false,
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EnvironmentVars: []string{
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"USER", "USERNAME", "LOGNAME",
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"LANG", "LANGUAGE", "_",
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},
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}
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}
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func LoadConfig(cpath string) (*Config, error) {
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if _, err := os.Stat(cpath); os.IsNotExist(err) {
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return nil, err
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}
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if err := checkConfigPermissions(cpath); err != nil {
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return nil, err
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}
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bs, err := ioutil.ReadFile(cpath)
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if err != nil {
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return nil, err
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}
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c := NewDefaultConfig()
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if err := json.Unmarshal(bs, c); err != nil {
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return nil, err
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}
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return c, nil
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}
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func checkConfigPermissions(fpath string) error {
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pd := path.Dir(fpath)
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for _, fp := range []string{pd, fpath} {
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if err := checkPathRootPermissions(fp); err != nil {
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return fmt.Errorf("file (%s) is %s", fp, err)
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}
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}
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return nil
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}
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func checkPathRootPermissions(fpath string) error {
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fstat, err := os.Stat(fpath)
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if err != nil {
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return err
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}
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if (fstat.Mode().Perm() & syscall.S_IWOTH) != 0 {
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return fmt.Errorf("writable by everyone!", fpath)
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}
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if (fstat.Mode().Perm()&syscall.S_IWGRP) != 0 && fstat.Sys().(*syscall.Stat_t).Gid != 0 {
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return fmt.Errorf("writable by someone else than root!", err)
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}
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return nil
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}
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