? atactl
Index: atactl.c
===================================================================
RCS file: /cvs/src/sbin/atactl/atactl.c,v
retrieving revision 1.46
diff -u -p -r1.46 atactl.c
--- atactl.c	20 Aug 2015 22:02:20 -0000	1.46
+++ atactl.c	3 Dec 2015 10:58:59 -0000
@@ -44,6 +44,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <ctype.h>
 #include <util.h>
 
 #include <dev/ata/atareg.h>
@@ -1589,6 +1590,25 @@ smart_cksum(u_int8_t *data, size_t len)
 	return (sum);
 }
 
+void
+hexdump(const void *data, size_t datalen)
+{
+	const uint8_t *d = data;
+	int i, j = 0;
+
+	for (i = 0; i < datalen; i += j) {
+		printf("% 4d: ", i);
+		for (j = 0; j < 16 && i+j < datalen; j++)
+			printf("%02x ", d[i + j]);
+		while (j++ < 16)
+			printf("   ");
+		printf("|");
+		for (j = 0; j < 16 && i+j < datalen; j++)
+			putchar(isprint(d[i + j]) ? d[i + j] : '.');
+		printf("|\n");
+	}
+}
+
 /*
  * Read device attributes
  */
@@ -1627,6 +1647,11 @@ device_attr(int argc, char *argv[])
 	req.databuf = (caddr_t)&attr_thr;
 	req.datalen = sizeof(attr_thr);
 	ata_command(&req);
+
+	printf("attr_val:\n");
+	hexdump(&attr_val, sizeof(attr_val));
+	printf("attr_thr:\n");
+	hexdump(&attr_thr, sizeof(attr_thr));
 
 	if (attr_val.revision != attr_thr.revision) {
 		/*