Function get_content_length

http-backend.c:366–374

}

static ssize_t get_content_length(void)
{
	ssize_t val = -1;
	const char *str = getenv("CONTENT_LENGTH");

	if (str && *str && !git_parse_ssize_t(str, &val))
		die("failed to parse CONTENT_LENGTH: %s", str);
	return val;
}

static ssize_t read_request(int fd, unsigned char **out, ssize_t req_len)
{