1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <mdb/mdb_modapi.h>
30#include <sys/types.h>
31#include <sys/stream.h>
32#include <sys/strlog.h>
33
34int
35msgbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
36{
37	queue_t q;
38	uintptr_t qp;
39	mblk_t next;
40	mblk_t cont;
41	log_ctl_t lctl;
42	char line[1024];
43	uint_t verbose = FALSE;
44
45	if (!(flags & DCMD_ADDRSPEC)) {
46		if (mdb_readsym(&qp, sizeof (qp), "log_recentq") == -1) {
47			mdb_warn("failed to read log_recent");
48			return (DCMD_ERR);
49		}
50
51		if (mdb_vread(&q, sizeof (q), qp) == -1) {
52			mdb_warn("failed to read queue_t at %p", qp);
53			return (DCMD_ERR);
54		}
55
56		if (mdb_pwalk_dcmd("b_next", "msgbuf", argc, argv,
57		    (uintptr_t)q.q_first) == -1) {
58			mdb_warn("can't walk 'b_next'");
59			return (DCMD_ERR);
60		}
61		return (DCMD_OK);
62	}
63
64	if (mdb_getopts(argc, argv,
65	    'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc)
66		return (DCMD_USAGE);
67
68	if (DCMD_HDRSPEC(flags)) {
69		if (verbose)
70			mdb_printf("%<u>%20s %?s %-40s%</u>\n",
71			    "TIMESTAMP", "LOGCTL", "MESSAGE");
72		else
73			mdb_printf("%<u>%-70s%</u>\n", "MESSAGE");
74	}
75
76	if (mdb_vread(&next, sizeof (next), addr) == -1) {
77		mdb_warn("failed to read msgb structure at %p", addr);
78		return (DCMD_ERR);
79	}
80
81	if (mdb_vread(&lctl, sizeof (lctl), (uintptr_t)next.b_rptr) == -1) {
82		mdb_warn("failed to read log_ctl_t at %p", next.b_rptr);
83		return (DCMD_ERR);
84	}
85
86	if (mdb_vread(&cont, sizeof (cont), (uintptr_t)next.b_cont) == -1) {
87		mdb_warn("failed to read msgb structure at %p", next.b_cont);
88		return (DCMD_ERR);
89	}
90
91	if (mdb_readstr(line, sizeof (line), (uintptr_t)cont.b_rptr) == -1) {
92		mdb_warn("failed to read string at %p", cont.b_rptr);
93		return (DCMD_ERR);
94	}
95
96	if (verbose)
97		mdb_printf("%Y %?p ", lctl.ttime,  next.b_rptr);
98
99	/* skip leading CR to avoid extra lines */
100	if (line[0] == 0x0d)
101		mdb_printf("%s", &line[1]);
102	else
103		mdb_printf("%s", &line[0]);
104
105	return (DCMD_OK);
106}
107