flag 

 1 package main
 2 
 3 import (
 4     "flag"
 5     "fmt"
 6     "os"
 7 )
 8 
 9 var (
10     h    bool
11     v, V bool
12     t, T bool
13     q    *bool
14     s    string
15     p    string
16     c    string
17     g    string
18 )
19 
20 func init() {
21     flag.BoolVar(&h, "h", false, "this help")
22     flag.BoolVar(&v, "v", false, "show version and exit")
23     flag.BoolVar(&V, "V", false, "show version and configure options then exit")
24 
25     flag.BoolVar(&t, "t", false, "test configuration and exit")
26     flag.BoolVar(&T, "T", false, "test configuration, dump it and exit")
27 
28     q = flag.Bool("q", false, "suppress non-error messages during configuration testing")
29 
30     flag.StringVar(&s, "s", "", "send `signal` to a master process: stop, quit, reopen, reload")
31     flag.StringVar(&p, "p", "/usr/local/nginx/", "set `prefix` path")
32     flag.StringVar(&c, "c", "conf/nginx.conf", "set configuration `file`")
33     flag.StringVar(&g, "g", "conf/nginx.conf", "set global `directives` out of configuration file")
34 
35     flag.Usage = usage
36 }
37 
38 func main() {
39     flag.Parse()
40     if h {
41         flag.Usage()
42     }
43 }
44 
45 func usage() {
46     fmt.Fprintf(os.Stderr, `nginx version: nginx/1.10.0
47     Usage: nginx [-hvVtTq] [-s signal] [-c filename] [-p prefix] [-g directives]
48     Options:`)
49 
50     flag.PrintDefaults()
51 }

 

 

 

 

 

 

 

 

posted @ 2019-12-12 15:56  尘归风  阅读(440)  评论(0)    收藏  举报