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Forum Index : Microcontroller and PC projects : UNIX-like commands: cat dir grep more

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rave
Newbie

Joined: 24/02/2018
Location: United States
Posts: 28

Posted: 03:35am 22 Apr 2018

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Hi all,

I've uploaded my UNIX-like "implied RUN commands" to FruitOfTheShed

These commands are:

cat catenate files to output
dir list files
grep search files using a pattern or string
more file pager and hexdump utility

These commands support the following useful command-line features:

- File and directory name globbing with * and ?
- Paths can be separated with \ as usual or with /
- Input can be redirected with < FILE
- Output can be redirected with > FILE or >> FILE (append)

This works thanks to the power of MMBasic 4.5. Geoff did a great job

and

for MMBasic.

For example:

- Display and page through all .bas files in the project directory and its subdirectories (hit key SPACE/ENTER/ESC while viewing):

more project/*.bas project/*/*.bas

- Hexdump all .bmp files located in B:\images:

more -x B:\images\*.bmp

- Search and display the lines with line numbers of .bas files in the project directory that have the text "Usage" at the start of the line:

grep -n "^Usage:" project/*.bas

A driver program WALKDIRS.BAS is included in MMUNIX-v2.zip to implement your own UNIX-like commands. The driver program performs de-globbing and sets up file redirects. This way you only have to add a few command-related subs to perform actions on files/directories

.

I've "stolen" a bit of beautiful code written by Rob Pike for regex matching with my grep implementation, but I rewrote it in MMBasic and added the [] ? + operators to make it more useful.

Enjoy!

- Rob

twofingers

Guru

Joined: 02/06/2014
Location: Germany
Posts: 1772

Posted: 02:50pm 22 Apr 2018

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Hi Rob!
Congratulation! Good job!

GREP and REGEX are a must have.
I will try later.
Kind regards
Michael

‚My name is Ozymandias, king of kings
Look on my works, ye Mighty, and despair!‘
Nothing beside remains. Round the decay
Of that colossal wreck, boundless and bare
The lone and ...

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