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- ECHO George Kerber 08/28/89
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- This new echo command should be almost totally compatible with the AmigaDOS
- echo command which this replaces. This means that you can replace your
- current version of echo (AmigaDOS or ARP) with this echo and all of your
- batch/script files will work okay with only a few exceptions. If you are
- using the FIRST and LEN option for the AmigaDOS echo command, my echo does
- not support this. In the current Amiga environment, without command line
- substitution and (real) piping, I can't see any use for the FIRST and LEN
- options. This shouldn't be any restriction. Also, I'll be damned if I can
- figure out how to let the user enter a quote from the command line. To
- print a literal quote, escape a 'q'. See the docs.
-
- Okay, so I got carried away with options. With this echo command you can
- place text anywhere on the screen with any color or attribute and any
- background color. See the echo.examples script to see what can be done
- with this versatility.
-
- I never know how much error checking to do on the user entered options.
- Complete error checking can help a user who is having trouble with the
- program. But complete error checking makes the program larger. Should the
- program ignore bad option values (like trying to move the cursor to
- line 2005) or should it inform the user what the allowed values are? As an
- exercise in programming, I elected to try and check for every possible error
- the user could make.
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- One error that I don't know how to catch is a missing quote.
-
- 1> echo "see the missing quote....
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- My echo will think that no string was entered and simply produce a blank
- line as if no string was entered at all. The AmigaDOS and ARP echo's catch
- this, anyone have any ideas????
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- George Kerber
- 19756 E. Linvale Drive
- Aurora, Colorado 80013
- (303) 693-2890
-
- Compuserve: 74010.2132
-