readme: Add source locations for RTEMS Shell

If you have any ideas about the missing ones let us know.

This also reformats other areas using mdformat since it was used for the tables.

cpukit/libmisc/shell/README.md

@@ -1,10 +1,9 @@
-Shell
+# Shell
-=====
 
 This directory contains a shell user extension
 primary features:
 
-   + create a user shell terminal task.
+- create a user shell terminal task.
 
 This code has not been extensively tested. It is provided as a tool
 for RTEMS users to open more shell terminal.
@@ -24,3 +23,66 @@ NOTES:
 FUTURE:
 
 1. Adding new commands in cmds.c to give file manegement to shell.
+
+## Source locations
+
+Below is the location of where the RTEMS Shell source was derived.
+
+### FreeBSD
+
+If any are empty and you know the location please submit an MR.
+
+| RTEMS Shell        | Location                       |
+| :----------------- | :----------------------------- |
+| warn.c             |                                |
+| warnx.c            |                                |
+| vwarnx.c           |                                |
+| errx.c             |                                |
+| verr.c             |                                |
+| verrx.c            |                                |
+| vwarn.c            |                                |
+| dd.h               | bin/dd/dd.h                    |
+| cmp.c              | bin/ls/cmp.c                   |
+| mv.c               | bin/mv/mv.c                    |
+| vis.c              | contrib/libc-vis/vis.c         |
+| vis.h              | contrib/libc-vis/vis.h         |
+| err.h              | include/err.h                  |
+| fts.h              | include/fts.h                  |
+| err.c              | lib/libc/gen/err.c             |
+| fts.c              | lib/libc/gen/fts.c             |
+| main_cp.c          | bin/cp/cp.c                    |
+| utils-cp.c         | bin/cp/utils.c                 |
+| dd-args.c          | bin/dd/args.c                  |
+| dd-conv.c          | bin/dd/conv.c                  |
+| main_dd.c          | bin/dd/dd.c                    |
+| extern-dd.h        | bin/dd/extern.h                |
+| dd-misc.c          | bin/dd/misc.c                  |
+| main_echo.c        | bin/echo/echo.c                |
+| main_ln.c          | bin/ln/ln.c                    |
+| main_ls.c          | bin/ls/ls.c                    |
+| extern-ls.h        | bin/ls/ls.h                    |
+| print-ls.c         | bin/ls/print.c                 |
+| utils-ls.c         | bin/ls/util.c                  |
+| main_rm.c          | bin/rm/rm.c                    |
+| extern-cp.h        | include/extern.h               |
+| sysexits.h         | include/sysexits.h             |
+| pwcache.c          | contrib/libc-pwcache/pwcache.c |
+| filemode.c         | lib/libc/string/strmode.c      |
+| hexdump.h          | usr.bin/hexdump/hexdump.h      |
+| hexsyntax.c        | usr.bin/hexdump/hexsyntax.c    |
+| dd-conv_tab.c      | bin/dd/conv_tab.c              |
+| dd-position.c      | bin/dd/position.c              |
+| main_mknod.c       | sbin/mknod/mknod.c             |
+| hexdump-conv.c     | usr.bin/hexdump/conv.c         |
+| main_hexdump.c     | usr.bin/hexdump/hexdump.c      |
+| hexdump-parse.c    | usr.bin/hexdump/parse.c        |
+| mknod-pack_dev.c   | contrib/mknod/pack_dev.c       |
+| mknod-pack_dev.h   | contrib/mknod/pack_dev.h       |
+| hexdump-display.c  | usr.bin/hexdump/display.c      |
+| hexdump-odsyntax.c | usr.bin/hexdump/odsyntax.c     |
+
+### Sanos
+
+| RTEMS Shell | Location                                      |
+| :---------- | :-------------------------------------------- |
+| main_edit.c | https://texteditors.org/cgi-bin/wiki.pl?Sanos |