/
sigctl.go
54 lines (51 loc) · 1.18 KB
/
sigctl.go
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package command
import (
"flag"
"fmt"
"os"
"github.com/frankbraun/codechain/hashchain"
"github.com/frankbraun/codechain/secpkg"
"github.com/frankbraun/codechain/util/def"
"github.com/frankbraun/codechain/util/log"
)
// SigCtl implements the 'sigctl' command.
func SigCtl(argv0 string, args ...string) error {
fs := flag.NewFlagSet(argv0, flag.ContinueOnError)
fs.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s -m\n", argv0)
fmt.Fprintf(os.Stderr, "Change signature control value.\n")
fs.PrintDefaults()
}
m := fs.Int("m", -1, "Signature threshold M")
verbose := fs.Bool("v", false, "Be verbose")
if err := fs.Parse(args); err != nil {
return err
}
if *verbose {
log.Std = log.NewStd(os.Stdout)
}
if *m == -1 {
return fmt.Errorf("%s: option -m is mandatory", argv0)
}
if *m < 1 {
return fmt.Errorf("%s: option -m must be >= 1", argv0)
}
if fs.NArg() != 0 {
fs.Usage()
return flag.ErrHelp
}
if err := secpkg.UpToDate("codechain"); err != nil {
return err
}
c, err := hashchain.ReadFile(def.HashchainFile)
if err != nil {
return err
}
defer c.Close()
line, err := c.SignatureControl(*m)
if err != nil {
return err
}
fmt.Println(line)
return nil
}