21-simple-bash-utils

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Educational project SimpleBashUtils from organization «School 21».

Development of Bash text utilities cat & grep in C programming languages. Developed functions have all the original flags supported, including paired combinations.

USEFUL NOTES:

• there is a significant difference in work of commands on other operating systems. It was not possible to find best testing option, except for using machines on campus.
• cat command has the ability to output contents of several files with one command, however, to submit the s21_cat project, it is enough to be able to process one file. There is a small difference in output, which is better to take into account at start, so as not to create crutches later.

[ SPOILER ] Overview of implemented code

s21_cat

TEMPLATE: cat [OPTION] [FILE]

No.	Option	Description	Status
1	-b (GNU: --number-nonblank)	numbers only non-empty lines	✅
2	-e подразумевает -v (только GNU: -E то же самое, но без -v)	but also display end-of-line characters as $	✅
3	-n (GNU: --number)	number all output lines	✅
4	-s (GNU: --squeeze-blank)	squeeze multiple adjacent blank lines	✅
5	-t подразумевает -v (GNU: -T то же самое, но без -v)	but also display tabs as ^I	✅

s21_grep

TEMPLATE: grep [OPTION] [TEMPLATE] [FILE]

No.	Option	Description	Status
1	-e	pattern	✅
2	-i	ignore uppercase vs. lowercase	✅
3	-v	invert match	✅
4	-c	output count of matching lines only.	✅
5	-l	output matching files only	✅
6	-n	precede each matching line with a line number	✅
7	-h	output matching lines without preceding them by file names	✅
8	-s	suppress error messages about nonexistent or unreadable files	✅
9	-f file	take regexes from a file	✅
10	-o	output the matched parts of a matching line	✅

— Thanks to 21-SCHOOL for provided assignment and special learning conditions ✌️🔥

Usage

1. Clone this repository via
   • SSH git@github.com:rynortheast/21-simple-bash-utils.git or
   • HTTPS https://github.com/rynortheast/21-simple-bash-utils.git
2. Change code base if necessary
3. Working with s21_cat:
   • Run make s21_cat to build programm
   • Run make test to run main tests
4. Working with s21_grep:
   • Run make s21_grep to build programm
   • Run make test to run main tests