initial import of NetBSD tree

3 files changed, 240 insertions, 0 deletions

diff --git a/sbin/dmesg/Makefile b/sbin/dmesg/Makefile
new file mode 100644
index 00000000000..939fc3d26cb
--- /dev/null
+++ b/sbin/dmesg/Makefile
@@ -0,0 +1,11 @@
+#	$NetBSD: Makefile,v 1.8 1995/03/18 14:54:45 cgd Exp $
+#	@(#)Makefile	8.1 (Berkeley) 6/5/93
+
+PROG=	dmesg
+MAN=	dmesg.8
+BINGRP=	kmem
+BINMODE=2555
+LDADD=	-lkvm
+DPADD=	${LIBKVM}
+
+.include <bsd.prog.mk>
diff --git a/sbin/dmesg/dmesg.8 b/sbin/dmesg/dmesg.8
new file mode 100644
index 00000000000..e49d77215ba
--- /dev/null
+++ b/sbin/dmesg/dmesg.8
@@ -0,0 +1,65 @@
+.\"	$NetBSD: dmesg.8,v 1.9 1995/03/18 14:54:47 cgd Exp $
+.\"
+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)dmesg.8	8.1 (Berkeley) 6/5/93
+.\"
+.Dd June 5, 1993
+.Dt DMESG 8
+.Os BSD 4
+.Sh NAME
+.Nm dmesg
+.Nd "display the system message buffer"
+.Sh SYNOPSIS
+.Nm dmesg
+.Op Fl M Ar core
+.Op Fl N Ar system
+.Sh DESCRIPTION
+.Nm Dmesg
+displays the contents of the system message buffer.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl M
+Extract values associated with the name list from the specified core
+instead of the default ``/dev/kmem''.
+.It Fl N
+Extract the name list from the specified system instead of the default
+``/netbsd''.
+.El
+.Sh SEE ALSO
+.Xr syslogd 8
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.0 .
diff --git a/sbin/dmesg/dmesg.c b/sbin/dmesg/dmesg.c
new file mode 100644
index 00000000000..be0c3638ea6
--- /dev/null
+++ b/sbin/dmesg/dmesg.c
@@ -0,0 +1,164 @@
+/*	$NetBSD: dmesg.c,v 1.8 1995/03/18 14:54:49 cgd Exp $	*/
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)dmesg.c	8.1 (Berkeley) 6/5/93";
+#else
+static char rcsid[] = "$NetBSD: dmesg.c,v 1.8 1995/03/18 14:54:49 cgd Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/cdefs.h>
+#include <sys/msgbuf.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <limits.h>
+#include <nlist.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <vis.h>
+
+struct nlist nl[] = {
+#define	X_MSGBUF	0
+	{ "_msgbufp" },
+	{ NULL },
+};
+
+void usage __P((void));
+
+#define	KREAD(addr, var) \
+	kvm_read(kd, addr, &var, sizeof(var)) != sizeof(var)
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register int ch, newl, skip;
+	register char *p, *ep;
+	struct msgbuf *bufp, cur;
+	char *memf, *nlistf;
+	kvm_t *kd;
+	char buf[5];
+
+	memf = nlistf = NULL;
+	while ((ch = getopt(argc, argv, "M:N:")) != EOF)
+		switch(ch) {
+		case 'M':
+			memf = optarg;
+			break;
+		case 'N':
+			nlistf = optarg;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	/*
+	 * Discard setgid privileges if not the running kernel so that bad
+	 * guys can't print interesting stuff from kernel memory.
+	 */
+	if (memf != NULL || nlistf != NULL)
+		setgid(getgid());
+
+	/* Read in kernel message buffer, do sanity checks. */
+	if ((kd = kvm_open(nlistf, memf, NULL, O_RDONLY, "dmesg")) == NULL)
+		exit (1);
+	if (kvm_nlist(kd, nl) == -1)
+		errx(1, "kvm_nlist: %s", kvm_geterr(kd));
+	if (nl[X_MSGBUF].n_type == 0)
+		errx(1, "%s: msgbufp not found", nlistf ? nlistf : "namelist");
+	if (KREAD(nl[X_MSGBUF].n_value, bufp) || KREAD((long)bufp, cur))
+		errx(1, "kvm_read: %s", kvm_geterr(kd));
+	kvm_close(kd);
+	if (cur.msg_magic != MSG_MAGIC)
+		errx(1, "magic number incorrect");
+	if (cur.msg_bufx >= MSG_BSIZE)
+		cur.msg_bufx = 0;
+
+	/*
+	 * The message buffer is circular; start at the read pointer, and
+	 * go to the write pointer - 1.
+	 */
+	p = cur.msg_bufc + cur.msg_bufx;
+	ep = cur.msg_bufc + cur.msg_bufx - 1;
+	for (newl = skip = 0; p != ep; ++p) {
+		if (p == cur.msg_bufc + MSG_BSIZE)
+			p = cur.msg_bufc;
+		ch = *p;
+		/* Skip "\n<.*>" syslog sequences. */
+		if (skip) {
+			if (ch == '>')
+				newl = skip = 0;
+			continue;
+		}
+		if (newl && ch == '<') {
+			skip = 1;
+			continue;
+		}
+		if (ch == '\0')
+			continue;
+		newl = ch == '\n';
+		(void)vis(buf, ch, 0, 0);
+		if (buf[1] == 0)
+			(void)putchar(buf[0]);
+		else
+			(void)printf("%s", buf);
+	}
+	if (!newl)
+		(void)putchar('\n');
+	exit(0);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: dmesg [-M core] [-N system]\n");
+	exit(1);
+}