minio/hash-binary.go

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package main
import (
"fmt"
"io"
"os"
"os/exec"
"crypto/md5"
)
// hashBinary computes MD5SUM of a binary file on disk
func hashBinary(progName string) (string, error) {
path, err := exec.LookPath(progName)
if err != nil {
return "", err
}
m := md5.New()
file, err := os.Open(path) // For read access.
if err != nil {
return "", err
}
io.Copy(m, file)
return fmt.Sprintf("%x", m.Sum(nil)), nil
}
// mustHashBinarySelf masks any error returned by hashBinary
func mustHashBinarySelf() string {
hash, _ := hashBinary(os.Args[0])
return hash
}