builtins/common.c
- read_octal: allow octal numbers greater than 777 to accommodate
  modes and umasks that include sticky/setuid/setgid bits. Report
  and fix from Martijn Dekker <martijn@inlv.org>

/* Return the octal number parsed from STRING, or -1 to indicate
   that the string contained a bad number. */
int
read_octal (string)
     char *string;
{
  int result, digits;
  result = digits = 0;
  while (*string && ISOCTAL (*string))
    {
      digits++;
      result = (result * 8) + (*string++ - '0');
      if (result > 07777)
    return -1;
    }
  if (digits == 0 || *string)
    result = -1;
  return (result);
}

Было        if (result > 0777)