| File Name | File Copyright Text |
| error.c | Copyright (C) 1990, 91, 92, 93, 94, 95, 96 Free Software Foundation, Inc. |
| getopt.c | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 1996
Free Software Foundation, Inc. |
| getopt.h | Copyright (C) 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc. |
| getopt1.c | Copyright (C) 1987, 88, 89, 90, 91, 92, 1993, 1994
Free Software Foundation, Inc. |
| resuse.c | Copyright (C) 1993, 1996 Free Software Foundation, Inc. |
| resuse.h | Copyright (C) 1993, 1996 Free Software Foundation, Inc. |
| time.c | Copyright (C) 1990, 91, 92, 93, 96 Free Software Foundation, Inc. |
| wait.h | Copyright (C) 1990 Free Software Foundation, Inc. |