Add an extension to the UINT & ULONG types. The XINT & XLONG types behave

the same, except sysctl(8) will print out the values in hex.

sbin/sysctl/sysctl.c

@@ -578,7 +578,11 @@ show_var(int *oid, int nlen)
 		while (len >= sizeof(int)) {
 			fputs(val, stdout);
 			if (*fmt == 'U')
-				printf(hflag ? "%'u" : "%u", *(unsigned int *)p);
+				printf(hflag ? "%'u" : "%u",
+				    *(unsigned int *)p);
+			else if (*fmt == 'X')
+				printf(hflag ? "%'#010x" : "%#010x",
+				    *(unsigned int *)p);
 			else if (*fmt == 'K') {
 				if (*(long *)p < 0)
 					printf("%ld", *(long *)p);
@@ -601,7 +605,11 @@ show_var(int *oid, int nlen)
 		while (len >= sizeof(long)) {
 			fputs(val, stdout);
 			if (*fmt == 'U')
-				printf(hflag ? "%'lu" : "%lu", *(unsigned long *)p);
+				printf(hflag ? "%'lu" : "%lu",
+				    *(unsigned long *)p);
+			else if (*fmt == 'X')
+				printf(hflag ? "%'#018lx" : "%#018lx",
+				    *(unsigned long *)p);
 			else if (*fmt == 'K') {
 				if (*(long *)p < 0)
 					printf("%ld", *(long *)p);

share/man/man9/sysctl.9

@@ -38,7 +38,9 @@
 .Nm SYSCTL_STRING ,
 .Nm SYSCTL_STRUCT ,
 .Nm SYSCTL_UINT ,
-.Nm SYSCTL_ULONG
+.Nm SYSCTL_ULONG ,
+.Nm SYSCTL_XINT ,
+.Nm SYSCTL_XLONG
 .Nd Static sysctl declaration functions
 .Sh SYNOPSIS
 .In sys/types.h
@@ -129,6 +131,24 @@
 .Fa "val"
 .Fa "descr"
 .Fc
+.Fo SYSCTL_XINT
+.Fa "parent"
+.Fa "nbr"
+.Fa "name"
+.Fa "access"
+.Fa "ptr"
+.Fa "val"
+.Fa "descr"
+.Fc
+.Fo SYSCTL_XLONG
+.Fa "parent"
+.Fa "nbr"
+.Fa "name"
+.Fa "access"
+.Fa "ptr"
+.Fa "val"
+.Fa "descr"
+.Fc
 .Sh DESCRIPTION
 The
 .Nm
@@ -153,8 +173,10 @@ New nodes are declared using one of
 .Nm SYSCTL_STRING ,
 .Nm SYSCTL_STRUCT ,
 .Nm SYSCTL_UINT ,
+.Nm SYSCTL_ULONG ,
+.Nm SYSCTL_XINT ,
 and
-.Nm SYSCTL_ULONG .
+.Nm SYSCTL_XLONG .
 Each macro accepts a parent name, as declared using
 .Nm SYSCTL_DECL ,
 an OID number, typically
@@ -271,6 +293,7 @@ Examples of integer, opaque, string, and procedure sysctls follow:
  * Example of a constant integer value.  Notice that the control
  * flags are CTLFLAG_RD, the variable pointer is NULL, and the
  * value is declared.
+ * If sysctl(8) should print this value in hex, use 'SYSCTL_XINT'.
  */
 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, NULL,
     sizeof(struct bio), "sizeof(struct bio)");

sys/sys/sysctl.h

@@ -259,6 +259,14 @@ TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|(access),	    \
 	ptr, val, sysctl_handle_int, "IU", __DESCR(descr))
 
+#define SYSCTL_XINT(parent, nbr, name, access, ptr, val, descr) \
+	SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|(access), \
+		ptr, val, sysctl_handle_int, "IX", descr)
+
+#define SYSCTL_ADD_XINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
+	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|(access),	    \
+	ptr, val, sysctl_handle_int, "IX", __DESCR(descr))
+
 /* Oid for a long.  The pointer must be non NULL. */
 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
 	SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|(access), \
@@ -277,6 +285,14 @@ TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|(access),	    \
 	ptr, 0, sysctl_handle_long, "LU", __DESCR(descr))
 
+#define SYSCTL_XLONG(parent, nbr, name, access, ptr, val, descr) \
+	SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|(access), \
+		ptr, val, sysctl_handle_long, "LX", __DESCR(descr))
+
+#define SYSCTL_ADD_XLONG(ctx, parent, nbr, name, access, ptr, descr)	    \
+	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|(access),	    \
+	ptr, 0, sysctl_handle_long, "LX", __DESCR(descr))
+
 /* Oid for an opaque object.  Specified by a pointer and a length. */
 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \