sd_id128: use ioutil.ReadFile instead of rolling my own readfile.

2 files changed, 5 insertions, 19 deletions

diff --git a/sd_id128/get.go b/sd_id128/get.go
index d8cdcfa..40d1219 100644
--- a/sd_id128/get.go
+++ b/sd_id128/get.go
@@ -17,6 +17,7 @@ package sd_id128
 import (
 	"crypto/rand"
 	"os"
+	"io/ioutil"
 	"strings"
 )
 
@@ -61,11 +62,11 @@ var cachedMachineID ID128
 // machine-id(5): https://www.freedesktop.org/software/systemd/man/machine-id.html
 func GetMachineID() (ID128, error) {
 	if cachedMachineID == (ID128{}) {
-		str, err := readfile("/etc/machine-id")
+		str, err := ioutil.ReadFile("/etc/machine-id")
 		if err != nil {
 			return ID128{}, err
 		}
-		id, err := ParsePlain(strings.TrimSuffix(str, "\n"))
+		id, err := ParsePlain(strings.TrimSuffix(string(str), "\n"))
 		if err != nil {
 			return ID128{}, err
 		}
@@ -94,11 +95,11 @@ var cachedBootID ID128
 // random(4): http://man7.org/linux/man-pages/man4/random.4.html
 func GetBootUUID() (ID128, error) {
 	if cachedBootID == (ID128{}) {
-		str, err := readfile("/proc/sys/kernel/random/boot_id")
+		str, err := ioutil.ReadFile("/proc/sys/kernel/random/boot_id")
 		if err != nil {
 			return ID128{}, err
 		}
-		id, err := ParseUUID(strings.TrimSuffix(str, "\n"))
+		id, err := ParseUUID(strings.TrimSuffix(string(str), "\n"))
 		if err != nil {
 			return ID128{}, err
 		}
diff --git a/sd_id128/util.go b/sd_id128/util.go
index ae50008..77c6079 100644
--- a/sd_id128/util.go
+++ b/sd_id128/util.go
@@ -14,11 +14,6 @@
 
 package sd_id128
 
-import (
-	"io/ioutil"
-	"os"
-)
-
 func hexchar(x byte) byte {
 	return "0123456789abcdef"[x&15]
 }
@@ -33,13 +28,3 @@ func unhexchar(c byte) (byte, error) {
 	}
 	return 0, ErrInvalid
 }
-
-func readfile(filename string) (string, error) {
-	file, err := os.Open(filename)
-	if err != nil {
-		return "", err
-	}
-	defer file.Close()
-	b, err := ioutil.ReadAll(file)
-	return string(b), err
-}