netbird/client/ssh/lookup_darwin.go
Maycon Santos ff729f6755
Use id command for user lookup on MacOS (#384)
When building client without CGO, user.Lookup
attempts to get user from /etc/passwd
Which doesn't have the user as MacOS uses
opendirectoryd as user directory
2022-07-07 16:13:46 +02:00

48 lines
1.1 KiB
Go

//go:build darwin
// +build darwin
package ssh
import (
"bytes"
"fmt"
"os/exec"
"os/user"
"strings"
)
func userNameLookup(username string) (*user.User, error) {
var userObject *user.User
userObject, err := user.Lookup(username)
if err != nil && err.Error() == user.UnknownUserError(username).Error() {
return idUserNameLookup(username)
} else if err != nil {
return nil, err
}
return userObject, nil
}
func idUserNameLookup(username string) (*user.User, error) {
cmd := exec.Command("id", "-P", username)
out, err := cmd.CombinedOutput()
if err != nil {
return nil, fmt.Errorf("error while retrieving user with id -P command, error: %v", err)
}
colon := ":"
if !bytes.Contains(out, []byte(username+colon)) {
return nil, fmt.Errorf("unable to find user in returned string")
}
// netbird:********:501:20::0:0:netbird:/Users/netbird:/bin/zsh
parts := strings.SplitN(string(out), colon, 10)
userObject := &user.User{
Username: parts[0],
Uid: parts[2],
Gid: parts[3],
Name: parts[7],
HomeDir: parts[8],
}
return userObject, nil
}