go/src/os/user/lookup.go

const userFile …

const groupFile …

var colon …

// Current returns the current user.
//
// The first call will cache the current user information.
// Subsequent calls will return the cached value and will not reflect
// changes to the current user.
func Current() (*User, error) { … }

var cache …

// Lookup looks up a user by username. If the user cannot be found, the
// returned error is of type [UnknownUserError].
func Lookup(username string) (*User, error) { … }

// LookupId looks up a user by userid. If the user cannot be found, the
// returned error is of type [UnknownUserIdError].
func LookupId(uid string) (*User, error) { … }

// LookupGroup looks up a group by name. If the group cannot be found, the
// returned error is of type [UnknownGroupError].
func LookupGroup(name string) (*Group, error) { … }

// LookupGroupId looks up a group by groupid. If the group cannot be found, the
// returned error is of type [UnknownGroupIdError].
func LookupGroupId(gid string) (*Group, error) { … }

// GroupIds returns the list of group IDs that the user is a member of.
func (u *User) GroupIds() ([]string, error) { … }