GopherProxy

	config.go - fingered - Fingerd protocol daemon, allowing custom responses.
	git clone git://jay.scot/fingered
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	---
	config.go (1302B)
	---
	1 package config
	2
	3 import (
	4 "flag"
	5 "fmt"
	6 "log"
	7 )
	8
	9 const (
	10 maxPort = 65535
	11 minPort = 1
	12 minThreads = 1
	13 )
	14
	15 type Config struct {
	16 Threads int
	17 Port int
	18 Dir string
	19 Index string
	20 }
	21
	22 func defaultConfig() Config {
	23 return Config{
	24 Threads: 10,
	25 Port: 79,
	26 Dir: "/srv/fingered",
	27 Index: "default",
	28 }
	29 }
	30
	31 func displayUsage() {
	32 flagSet := flag.CommandLine
	33 flag.Usage = func() {
	34 fmt.Printf("Usage:\n")
	35 flagSet.VisitAll(func(flag *flag.Flag) {
	36 fmt.Printf("\t-%s: %s (default: %s)\n", flag.Nam…
	37 })
	38 }
	39 }
	40
	41 func addFlags(cfg *Config) {
	42 flag.IntVar(&cfg.Threads, "t", cfg.Threads, "Number of worker th…
	43 flag.IntVar(&cfg.Port, "p", cfg.Port, "Port for incoming connect…
	44 flag.StringVar(&cfg.Dir, "d", cfg.Dir, "Directory containing use…
	45 flag.StringVar(&cfg.Index, "f", cfg.Index, "Filename for empty r…
	46 }
	47
	48 func ParseFlags() Config {
	49 cfg := defaultConfig()
	50 addFlags(&cfg)
	51 displayUsage()
	52 flag.Parse()
	53
	54 if cfg.Threads < minThreads {
	55 log.Fatal("Invalid number of threads: must be greater th…
	56 }
	57
	58 if cfg.Port < minPort \|\| cfg.Port > maxPort {
	59 log.Fatal("Invalid port value: must be between 1 and 655…
	60 }
	61
	62 if cfg.Dir == "" {
	63 log.Fatal("Invalid path value: directory cannot be empty…
	64 }
	65
	66 return cfg
	67 }