// parse conf from env and args
func parseConf() {
// let mflag parse first
mflag.Parse()
// using gconf parse env
gconf, err := globalconf.NewWithOptions(&globalconf.Options{
EnvPrefix: "WICKET_",
})
if err != nil {
log.Fatalf("error parsing config file: %v", err)
}
fs := flag.NewFlagSet("", flag.ContinueOnError)
mflag.VisitAll(func(f *mflag.Flag) {
for _, n := range f.Names {
if len(n) < 2 {
continue
}
n = strings.TrimPrefix(n, "-")
fs.Var(f.Value, n, f.Usage)
}
})
gconf.ParseSet("", fs)
}
func initConfig() {
configfile := mflag.String([]string{"-config"}, "/etc/sshpiperd.conf", "Config file path. Note: any option will be overwrite if it is set by commandline")
mflag.StringVar(&config.ListenAddr, []string{"l", "-listen_addr"}, "0.0.0.0", "Listening Address")
mflag.UintVar(&config.Port, []string{"p", "-port"}, 2222, "Listening Port")
mflag.StringVar(&config.WorkingDir, []string{"w", "-working_dir"}, "/var/sshpiper", "Working Dir")
mflag.StringVar(&config.PiperKeyFile, []string{"i", "-server_key"}, "/etc/ssh/ssh_host_rsa_key", "Key file for SSH Piper")
mflag.StringVar(&config.Challenger, []string{"c", "-challenger"}, "", "Additional challenger name, e.g. pam, emtpy for no additional challenge")
mflag.StringVar(&config.Logfile, []string{"-log"}, "", "Logfile path. Leave emtpy or any error occurs will fall back to stdout")
mflag.BoolVar(&config.AllowBadUsername, []string{"-allow_bad_username"}, false, "disable username check while search the working dir")
mflag.BoolVar(&config.ShowHelp, []string{"h", "-help"}, false, "Print help and exit")
mflag.BoolVar(&config.ShowVersion, []string{"-version"}, false, "Print version and exit")
mflag.Parse()
if _, err := os.Stat(*configfile); os.IsNotExist(err) {
if !mflag.IsSet("-config") {
*configfile = ""
} else {
logger.Fatalf("config file %v not found", *configfile)
}
}
gconf, err := globalconf.NewWithOptions(&globalconf.Options{
Filename: *configfile,
EnvPrefix: "SSHPIPERD_",
})
if err != nil { // this error will happen only if file error
logger.Fatalln("load config file error %v: %v", *configfile, err)
}
// build a dummy flag set for globalconf to parse
fs := flag.NewFlagSet("", flag.ContinueOnError)
ignoreSet := make(map[string]bool)
mflag.Visit(func(f *mflag.Flag) {
for _, n := range f.Names {
ignoreSet[n] = true
}
})
// should be ignored
ignoreSet["-help"] = true
ignoreSet["-version"] = true
mflag.VisitAll(func(f *mflag.Flag) {
for _, n := range f.Names {
if len(n) < 2 {
continue
}
if !ignoreSet[n] {
n = strings.TrimPrefix(n, "-")
fs.Var(f.Value, n, f.Usage)
}
}
})
gconf.ParseSet("", fs)
}