AdGuardHome/internal/aghos/user_unix.go

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// +build darwin freebsd linux netbsd openbsd
//go:build darwin || freebsd || linux || netbsd || openbsd
package aghos
import (
"fmt"
"os/user"
"strconv"
"syscall"
)
func setGroup(groupName string) (err error) {
g, err := user.LookupGroup(groupName)
if err != nil {
return fmt.Errorf("looking up group: %w", err)
}
gid, err := strconv.Atoi(g.Gid)
if err != nil {
return fmt.Errorf("parsing gid: %w", err)
}
err = syscall.Setgid(gid)
if err != nil {
return fmt.Errorf("setting gid: %w", err)
}
return nil
}
func setUser(userName string) (err error) {
u, err := user.Lookup(userName)
if err != nil {
return fmt.Errorf("looking up user: %w", err)
}
uid, err := strconv.Atoi(u.Uid)
if err != nil {
return fmt.Errorf("parsing uid: %w", err)
}
err = syscall.Setuid(uid)
if err != nil {
return fmt.Errorf("setting uid: %w", err)
}
return nil
}