A function that allows you to read a file line by line.

int	get_next_line(int fd, char **line)

This functions allocates memory and saves in line the next line of the opened file with the fd file descriptor. Returning 1, if there is still content to read in the file, 0 if the file has been completly returned and -1 if there was an error in the process.

The _bonus version allows you to interchange different fd. Using multiple fd in the other one before the file is fully readed is an undefined behaviour.