func cmdConfig(args []string) error {
if len(args) == 0 {
lines := strings.Split(jetpack.Config().String(), "\n")
sort.Strings(lines)
fmt.Println(strings.Join(lines[1:], "\n")) // first "line" is empty due to trailing newline
} else {
for _, propName := range args {
if val, ok := jetpack.Config().Get(propName); ok {
fmt.Println(val)
} else {
return errors.Errorf("No such property: %v", propName)
}
}
}
return nil
}
func main() {
flag.Parse()
Info.Pid = os.Getpid()
Info.Uid = -1
Info.Gid = -1
Info.Version = jetpack.Version()
if host, err := jetpack.NewHost(); err != nil {
log.Fatalln("Error initializing host:", err)
} else {
Host = host
}
if hostip, _, err := Host.HostIP(); err != nil {
panic(err)
} else {
Info.IP = hostip.String()
}
Info.Port = jetpack.Config().MustGetInt("mds.port")
if s, err := hex.DecodeString(jetpack.Config().MustGet("mds.signing-key")); err != nil {
panic(err)
} else {
SigningKey = s
}
switch lfPath, _ := jetpack.Config().Get("mds.logfile"); lfPath {
case "-", "":
log.SetOutput(os.Stderr)
case "none", "/dev/null":
log.SetOutput(ioutil.Discard)
default:
if lf, err := os.OpenFile(lfPath, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0640); err != nil {
log.Fatalf("Cannot open log file %#v: %v", lfPath, err)
} else {
log.SetOutput(lf)
defer lf.Close()
}
}
if pfPath, ok := jetpack.Config().Get("mds.pidfile"); ok {
if err := ioutil.WriteFile(pfPath, []byte(fmt.Sprintln(os.Getpid())), 0644); err != nil {
log.Fatalf("Cannot write pidfile %#v: %v", pfPath, err)
}
}
addr := fmt.Sprintf("%v:%d", Info.IP, Info.Port)
listener, err := net.Listen("tcp", addr)
if err != nil {
log.Fatalf("Cannot listen on %v: %v", addr, err)
}
if !jetpack.Config().GetBool("mds.keep-uid", false) {
uid, gid := jetpack.MDSUidGid()
if err := unix.Setgroups(nil); err != nil {
log.Fatal("Cannot clear groups:", err)
}
if err := unix.Setresgid(gid, gid, gid); err != nil {
log.Fatal("Cannot drop gid:", err)
}
if err := unix.Setresuid(uid, uid, uid); err != nil {
log.Fatal("Cannot drop uid:", err)
}
}
Info.Uid = os.Getuid()
Info.Gid = os.Getgid()
log.Println("Listening on:", addr)
log.Fatal(http.Serve(listener, http.HandlerFunc(ServeMetadata)))
}