Folder Opener

Overview

The Folder Opener is a C program designed to open folders specified in a text file. It supports multiple languages and provides verbose/silent modes for controlling output. It handles Windows, Linux, and macOS.

Files

1. folder_opener.c: The main source file containing the code.
2. folder_opener.languages: The file storing language-specific messages.
3. folder_opener.folders: The file containing the list of folders to open.

Dependencies

• Standard C libraries: stdio.h, stdlib.h, string.h, sys/stat.h
• Platform-specific headers:
  • Windows: windows.h, shellapi.h
  • Unix-like: unistd.h

Functions and Logic

custom_getline

• Purpose: A custom implementation of getline for reading lines from a file.
• Logic:
  • Allocates or resizes the line buffer.
  • Reads characters until EOF or newline is encountered.
  • Returns the length of the line read or -1 on error.

load_language

• Purpose: Load language messages from a file based on the specified language ID.
• Logic:
  • Reads the language file line-by-line.
  • Checks if the current language ID matches the target.
  • Parses messages marked with $message1, $message2, etc.
  • Stores messages in a global messages array.
  • Returns 0 if all messages are loaded, otherwise returns 1.

folder_exists

• Purpose: Check if a specified folder exists.
• Logic:
  • Uses stat to retrieve file information.
  • Returns true if the path exists and is a directory.

sanitize_input

• Purpose: Validates the input to prevent command injection.
• Logic:
  • Checks for special characters (&, ?, *, etc.) in the input.
  • Returns true if any unsafe character is found.

open_folder

• Purpose: Open the specified folder.
• Logic:
  • Validates input using sanitize_input.
  • Checks if the folder exists using folder_exists.
  • Depending on the platform:
    • Windows: Uses ShellExecuteEx.
    • macOS: Uses /usr/bin/open.
    • Linux: Uses xdg-open.
  • Prints appropriate error messages using loaded language strings.

main

• Purpose: Entry point of the program.
• Logic:
  • Sets UTF-8 output on Windows.
  • Parses command-line arguments for language and verbosity.
  • Loads language messages.
  • Checks other command-line options, printing unknown options.
  • Reads the folders file line-by-line.
  • Opens each folder by calling open_folder.
  • Frees allocated message memory.

Compilation

Compile the code using a C compiler. Example for GCC:

gcc -o folder_opener folder_opener.c

Usage

Run the program specifying the language:

./folder_opener -language HR

Or, if no language is specified, it defaults to English.