143 lines
2.8 KiB
Go
143 lines
2.8 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package system
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import (
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"fmt"
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"log"
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"os/exec"
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"strings"
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"github.com/vtolstov/cloudinit/config"
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)
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func CreateUser(u *config.User) error {
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args := []string{}
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if u.PasswordHash != "" {
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args = append(args, "--password", u.PasswordHash)
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} else {
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args = append(args, "--password", "*")
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}
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if u.GECOS != "" {
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args = append(args, "--comment", fmt.Sprintf("%q", u.GECOS))
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}
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if u.Homedir != "" {
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args = append(args, "--home-dir", u.Homedir)
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}
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if u.NoCreateHome {
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args = append(args, "--no-create-home")
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} else {
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args = append(args, "--create-home")
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}
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if u.PrimaryGroup != "" {
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args = append(args, "--gid", u.PrimaryGroup)
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}
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if len(u.Groups) > 0 {
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args = append(args, "--groups", strings.Join(u.Groups, ","))
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}
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if u.NoUserGroup {
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args = append(args, "--no-user-group")
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}
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if u.System {
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args = append(args, "--system")
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}
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if u.NoLogInit {
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args = append(args, "--no-log-init")
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}
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if u.Shell != "" {
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args = append(args, "--shell", u.Shell)
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}
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args = append(args, u.Name)
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output, err := exec.Command("useradd", args...).CombinedOutput()
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if err != nil {
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log.Printf("Command 'useradd %s' failed: %v\n%s", strings.Join(args, " "), err, output)
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return err
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}
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return nil
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}
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func IsLockedUser(u *config.User) bool {
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output, err := exec.Command("getent", "shadow", u.Name).CombinedOutput()
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if err == nil {
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fields := strings.Split(string(output), ":")
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if len(fields[1]) > 1 && fields[1][0] == '!' {
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return true
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}
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}
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return false
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}
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func LockUnlockUser(u *config.User) error {
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args := []string{}
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if u.LockPasswd {
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args = append(args, "-l")
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} else {
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if !IsLockedUser(u) {
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return nil
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}
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args = append(args, "-u")
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}
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args = append(args, u.Name)
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output, err := exec.Command("passwd", args...).CombinedOutput()
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if err != nil {
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log.Printf("Command 'passwd %s' failed: %v\n%s", strings.Join(args, " "), err, output)
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}
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return err
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}
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func SetUserPassword(user, hash string) error {
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cmd := exec.Command("chpasswd", "-e")
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stdin, err := cmd.StdinPipe()
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if err != nil {
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return err
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}
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err = cmd.Start()
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if err != nil {
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log.Fatal(err)
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}
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arg := fmt.Sprintf("%s:%s", user, hash)
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_, err = stdin.Write([]byte(arg))
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if err != nil {
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return err
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}
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stdin.Close()
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err = cmd.Wait()
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if err != nil {
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return err
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}
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return nil
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}
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