📝 close_fds

This function closes all open file descriptors starting from descriptor 3 up to FOPEN_MAX - 1.

⚙️ Parameters

Parameter	Type	Description
i	int	An integer parameter (ignored in the function, used internally).

🔁 Returns

Return value	Description
void	This function does not return a value. It closes file descriptors.

📖 Description

The close_fds function iterates through all possible file descriptors from 3 up to FOPEN_MAX - 1 and closes each one using the close system call. File descriptors 0, 1, and 2 (standard input, output, and error) are not closed.

• The input parameter i is overwritten internally and does not affect the function's behavior.
• This function is useful for cleaning up open file descriptors before executing a new process, to prevent descriptor leaks.

💡 Example Usage

// Close all non-standard file descriptors before executing a child process
int fd = open("example.txt", O_RDONLY);

close_fds(fd);