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user_group_lookup_test.go
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/
user_group_lookup_test.go
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// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"io/ioutil"
"os"
"os/user"
"path/filepath"
"testing"
"github.com/coreos/ignition/v2/internal/log"
)
// tempBase() slaps together a minimal /etc/{passwd,group} for the lookup test.
func tempBase() (string, error) {
td, err := ioutil.TempDir("", "ign-usr-lookup-test")
if err != nil {
return "", err
}
if err := os.MkdirAll(filepath.Join(td, "etc"), 0755); err != nil {
return "", err
}
gp := filepath.Join(td, "etc/group")
err = ioutil.WriteFile(gp, []byte("foo:x:4242:\n"), 0644)
if err != nil {
return "", err
}
pp := filepath.Join(td, "etc/passwd")
err = ioutil.WriteFile(pp, []byte("foo:x:44:4242::/home/foo:/bin/false"), 0644)
if err != nil {
return "", err
}
nsp := filepath.Join(td, "etc/nsswitch.conf")
err = ioutil.WriteFile(nsp, []byte("passwd: files\ngroup: files\nshadow: files\ngshadow: files\n"), 0644)
if err != nil {
return "", err
}
return td, nil
}
func TestUserLookup(t *testing.T) {
if os.Geteuid() != 0 {
t.Skip("test requires root for chroot(), skipping")
}
// perform a user lookup to ensure libnss_files.so is loaded
// note this assumes /etc/nsswitch.conf invokes files.
_, err := user.Lookup("root")
if err != nil {
t.Fatalf("user lookup failed (libnss_files.so might not be loaded): %v", err)
}
td, err := tempBase()
if err != nil {
t.Fatalf("temp base error: %v", err)
}
defer os.RemoveAll(td)
logger := log.New(true)
defer logger.Close()
u := &Util{
DestDir: td,
Logger: &logger,
}
usr, err := u.userLookup("foo")
if err != nil {
t.Fatalf("lookup error: %v", err)
}
if usr.Name != "foo" {
t.Fatalf("unexpected name: %q", usr.Name)
}
if usr.Uid != "44" {
t.Fatalf("unexpected uid: %q", usr.Uid)
}
if usr.Gid != "4242" {
t.Fatalf("unexpected gid: %q", usr.Gid)
}
}
func TestGroupLookup(t *testing.T) {
if os.Geteuid() != 0 {
t.Skip("test requires root for chroot(), skipping")
}
td, err := tempBase()
if err != nil {
t.Fatalf("temp base error: %v", err)
}
defer os.RemoveAll(td)
logger := log.New(true)
defer logger.Close()
u := &Util{
DestDir: td,
Logger: &logger,
}
grp, err := u.groupLookup("foo")
if err != nil {
t.Fatalf("lookup error: %v", err)
}
if grp.Name != "foo" {
t.Fatalf("unexpected name: %q", grp.Name)
}
if grp.Gid != "4242" {
t.Fatalf("unexpected gid: %q", grp.Gid)
}
}