/Projekti-2

Primary LanguageC

my-cat.c

Overview

my-cat is a simple implementation of the Unix cat command, which reads one or more files and prints their contents to the standard output.

Compilation

To compile my-cat, use the following command:

gcc -o my-cat my-cat.c

Usage

./my-cat file1 [file2 ...]
  • If no files are provided, the program exits without doing anything.
  • If one or more files are provided, it prints the contents of each file to the standard output.

Error Handling

  • If a file cannot be opened, the program prints my-cat: cannot open file and exits with status 1.

Example

./my-cat file1.txt file2.txt

my-grep.c

Overview

my-grep is a simple implementation of the Unix grep command, which searches for a specific term in one or more files and prints the matching lines.

Compilation

To compile my-grep, use the following command:

gcc -o my-grep my-grep.c

Usage

./my-grep searchterm [file1 ...]
  • If no search term is provided, the program prints my-grep: searchterm [file...] and exits with status 1.
  • If no files are provided, it reads from the standard input.
  • If one or more files are provided, it searches for the term in each file and prints the matching lines.

Error Handling

  • If a file cannot be opened, the program prints my-grep: cannot open file and exits with status 1.

Example

./my-grep "hello" file1.txt file2.txt

my-unzip.c

Overview

my-unzip is a simple implementation of a decompression utility that reads a compressed file and prints the decompressed contents to the standard output.

Compilation

To compile my-unzip, use the following command:

gcc -o my-unzip my-unzip.c

Usage

./my-unzip file
  • If no file is provided, the program prints my-unzip: file1 [file2 ...] and exits with status 1.
  • It reads the compressed file and prints the decompressed contents to the standard output.

Error Handling

  • If the file cannot be opened, the program prints an error message and exits with status 1.

Example

./my-unzip compressed_file

my-zip.c

Overview

my-zip is a simple implementation of a compression utility that reads a file and prints the compressed contents to the standard output.

Compilation

To compile my-zip, use the following command:

gcc -o my-zip my-zip.c

Usage

./my-zip file
  • If no file is provided, the program prints my-zip: file1 [file2 ...] and exits with status 1.
  • It reads the file and prints the compressed contents to the standard output.

Error Handling

  • If the file cannot be opened, the program prints an error message and exits with status 1.

Example

./my-zip file_to_compress