```c
#define _POSIX_C_SOURCE 200809L

#include <stdlib.h>
#include <sys/types.h>

#include "utils.h"

char *
read_line(FILE *f)
{
	char	*line;
	size_t	len;
	ssize_t	read;

	line = NULL;
	len = 0;
	read = getline(&line, &len, f);
	if (-1 == read)
	{
		free(line);
		return (NULL);
	}
	return (line);
}
```