/* Returns the /etc/passwd information for the user with specified login name.
 *
 * The information is returned as a Struct::Passwd; see getpwent above for
 * details.
 *
 * e.g.  * Etc.getpwnam('root') -> #<struct Struct::Passwd name="root",
 * passwd="x", uid=0, gid=0, gecos="root",dir="/root", shell="/bin/bash">
 */
static VALUE
etc_getpwnam(VALUE obj, VALUE nam)
{
#ifdef HAVE_GETPWENT
    struct passwd *pwd;

    SafeStringValue(nam);
    pwd = getpwnam(RSTRING_PTR(nam));
    if (pwd == 0) rb_raise(rb_eArgError, "can't find user for %s", RSTRING_PTR(nam));
    return setup_passwd(pwd);
#else 
    return Qnil;
#endif
}