Differential D20700 Diff 59085 head/lib/libsecureboot/readfile.c

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	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.			* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/			*/
	#include <sys/cdefs.h>			#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");			__FBSDID("$FreeBSD$");

	#include <libsecureboot.h>			#include <libsecureboot.h>

	unsigned char *			unsigned char *
	read_file(const char path, size_t len)			read_fd(int fd, size_t len)
	{			{
	int fd, m, n, x;			int m, n, x;
	struct stat st;
	unsigned char *buf;			unsigned char *buf;

	if (len)			buf = malloc(len + 1);
	*len = 0;			for (x = 0, m = len; m > 0; ) {
	if ((fd = open(path, O_RDONLY)) < 0)
	return (NULL);
	fstat(fd, &st);
	if (len)
	*len = st.st_size;
	buf = malloc(st.st_size + 1);
	for (x = 0, m = st.st_size; m > 0; ) {
	n = read(fd, &buf[x], m);			n = read(fd, &buf[x], m);
	if (n < 0)			if (n < 0)
	break;			break;
	if (n > 0) {			if (n > 0) {
	m -= n;			m -= n;
	x += n;			x += n;
	}			}
	}			}
	close(fd);
	if (m == 0) {			if (m == 0) {
	buf[st.st_size] = '\0';			buf[len] = '\0';
	return (buf);			return (buf);
	}			}
	free(buf);			free(buf);
	return (NULL);			return (NULL);
	}			}

				unsigned char *
				read_file(const char path, size_t len)
				{
				struct stat st;
				unsigned char *ucp;
				int fd;

				if (len)
				*len = 0;
				if ((fd = open(path, O_RDONLY)) < 0)
				return (NULL);
				fstat(fd, &st);
				ucp = read_fd(fd, st.st_size);
				close(fd);
				if (len != NULL && ucp != NULL)
				*len = st.st_size;
				return (ucp);
				}