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package app
import "regexp"
// nameRegex is the default NAME_REGEX value from adduser.
var nameRegex = regexp.MustCompilePOSIX(`^[a-zA-Z][a-zA-Z0-9_-]*\$?$`)
// isValidUsername returns whether the argument is a valid username
func isValidUsername(username string) bool {
return len(username) < sysconf(_SC_LOGIN_NAME_MAX) &&
nameRegex.MatchString(username)
}
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