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Option for displaying tool version (set to v0.1.0) #2

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Option for displaying tool version (set to v0.1.0) #2

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15 changes: 13 additions & 2 deletions certchk.go
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Original file line number Diff line number Diff line change
Expand Up @@ -37,11 +37,18 @@ import (
"github.com/dustin/go-humanize"
)

const toolVersion = "0.1.0"

var (
dialer = &net.Dialer{Timeout: 5 * time.Second}
file = flag.String("f", "", "read server names from `file`")
dialer = &net.Dialer{Timeout: 5 * time.Second}
file = flag.String("f", "", "read server names from `file`")
versionCheck bool
)

func init() {
flag.BoolVar(&versionCheck, "version", false, "show tool version")
}

func check(server string, width int) {
conn, err := tls.DialWithDialer(dialer, "tcp", server+":443", nil)
if err != nil {
Expand All @@ -65,6 +72,10 @@ func check(server string, width int) {
func main() {
// parse command-line args
flag.Parse()
if versionCheck {
fmt.Printf("%s v%s\n", os.Args[0], toolVersion)
os.Exit(0)
}
if flag.NArg() == 0 && len(*file) == 0 {
fmt.Fprintf(os.Stderr, "Usage: certchk [-f file] servername ...\n")
flag.PrintDefaults()
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