enevales/s21_bashutils

Implementation of two bash utilities: Cat and Grep;

Cat and Grep

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Implementation of two bash utilities: Cat and Grep;

An educational project designed to teach the organization of the Bash utilities and solidify knowledge of structured programming. These utilities (cat and grep) are often used in the Linux terminal.

Overview:

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• Cat is an UNIX command-line utility for displaying files, combining copies of them and creating new ones. Cat GNU Coreutils was taken as a model for the development of the utility.
• Grep is an UNIX command-line utility that searches the given files for lines containing a match to a given pattern list.

Technological description:

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• The programs were developed in C language of C11 standard using gcc compiler. Based on the POSIX.1-2017 standard.
• Integrated tests cover all flag variants and input values, based on a comparison with the behavior of real Bash utilities.
• Third-party libraries used: none
• Supported systems: Linux-based systems

cat Usage:

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installation:

$ cd src/cat $ make

$ s21_cat [OPTIONS] [FILE]...

cat Options:

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Options	Description
-b (GNU: --number-nonblank)	numbers only non-empty lines
-n (GNU: --number)	number all output lines
-s (GNU: --squeeze-blank)	squeeze multiple adjacent blank lines
-t implies -v (GNU: -T the same, but without implying -v)	but also display tabs as ^I
-e implies -v (GNU only: -E the same, but without implying -v)	but also display end-of-line characters as $

cat Demo:

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grep Usage:

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installation:

$ cd src/grep $ make

$ s21_grep [OPTIONS] TEMPLATE [FILES]...

grep Options:

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Options	Description
-e	pattern
-i	Ignore uppercase vs. lowercase.
-v	Invert match.
-c	Output count of matching lines only.
-l	Output matching files only.
-n	Precede each matching line with a line number.
-h	Output matching lines without preceding them by file names.
-s	Suppress error messages about nonexistent or unreadable files.
-f	Take regexes from a file.
-o	Output the matched parts of a matching line

grep Demo:

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Languages and Tools:

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