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[src/netbsd-1-5]: src/sbin/dmesg If "SMALL" is defined don't include kvm supp...
details: https://anonhg.NetBSD.org/src/rev/76dece5d3be1
branches: netbsd-1-5
changeset: 488177:76dece5d3be1
user: simonb <simonb%NetBSD.org@localhost>
date: Tue Jun 20 01:49:21 2000 +0000
description:
If "SMALL" is defined don't include kvm support, primarily for install
media.
diffstat:
sbin/dmesg/dmesg.c | 209 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 209 insertions(+), 0 deletions(-)
diffs (213 lines):
diff -r e88c1ac74a99 -r 76dece5d3be1 sbin/dmesg/dmesg.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sbin/dmesg/dmesg.c Tue Jun 20 01:49:21 2000 +0000
@@ -0,0 +1,209 @@
+/* $NetBSD: dmesg.c,v 1.20.2.2 2000/06/20 01:49:21 simonb 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__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
+__RCSID("$NetBSD: dmesg.c,v 1.20.2.2 2000/06/20 01:49:21 simonb Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/msgbuf.h>
+#include <sys/sysctl.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <nlist.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <vis.h>
+
+#ifndef SMALL
+struct nlist nl[] = {
+#define X_MSGBUF 0
+ { "_msgbufp" },
+ { NULL },
+};
+#endif
+
+int main(int, char *[]);
+void usage(void);
+
+#define KREAD(addr, var) \
+ kvm_read(kd, addr, &var, sizeof(var)) != sizeof(var)
+
+int
+main(int argc, char *argv[])
+{
+ struct kern_msgbuf cur;
+ int ch, newl, skip, i;
+ char *p, *bufdata;
+#ifndef SMALL
+ char *memf, *nlistf;
+#endif
+ char buf[5];
+
+#ifndef SMALL
+ memf = nlistf = NULL;
+ while ((ch = getopt(argc, argv, "M:N:")) != -1)
+ switch(ch) {
+ case 'M':
+ memf = optarg;
+ break;
+ case 'N':
+ nlistf = optarg;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (memf == NULL) {
+#endif
+ size_t size;
+ int mib[2];
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_MSGBUF;
+
+ if (sysctl(mib, 2, NULL, &size, NULL, 0) == -1)
+ errx(1, "can't get size of msgbuf");
+
+ if ((bufdata = malloc(size)) == NULL)
+ err(1, "couldn't allocate space for buffer data");
+
+ if (sysctl(mib, 2, bufdata, &size, NULL, 0) == -1)
+ err(1, "can't get msgbuf");
+
+ /* make a dummy struct msgbuf for the display logic */
+ cur.msg_bufx = cur.msg_bufs = size;
+#ifndef SMALL
+ } else {
+ kvm_t *kd;
+ struct kern_msgbuf *bufp;
+
+ /*
+ * Read in message buffer header and data, and do sanity
+ * checks.
+ */
+ kd = kvm_open(nlistf, memf, NULL, O_RDONLY, "dmesg");
+ if (kd == 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))
+ errx(1, "kvm_read: %s (0x%lx)", kvm_geterr(kd),
+ nl[X_MSGBUF].n_value);
+ if (kvm_read(kd, (long)bufp, &cur,
+ offsetof(struct kern_msgbuf, msg_bufc)) !=
+ offsetof(struct kern_msgbuf, msg_bufc))
+ errx(1, "kvm_read: %s (0x%lx)", kvm_geterr(kd),
+ (unsigned long)bufp);
+ if (cur.msg_magic != MSG_MAGIC)
+ errx(1, "magic number incorrect");
+ bufdata = malloc(cur.msg_bufs);
+ if (bufdata == NULL)
+ errx(1, "couldn't allocate space for buffer data");
+ if (kvm_read(kd, (long)&bufp->msg_bufc, bufdata,
+ cur.msg_bufs) != cur.msg_bufs)
+ errx(1, "kvm_read: %s", kvm_geterr(kd));
+ kvm_close(kd);
+ if (cur.msg_bufx >= cur.msg_bufs)
+ cur.msg_bufx = 0;
+ }
+#endif
+
+ /*
+ * The message buffer is circular; start at the write pointer
+ * (which points the oldest character), and go to the write
+ * pointer - 1 (which points the newest character). I.e, loop
+ * over cur.msg_bufs times. Unused area is skipped since it
+ * contains nul.
+ */
+ for (newl = skip = i = 0, p = bufdata + cur.msg_bufx;
+ i < cur.msg_bufs; i++, p++) {
+ if (p == bufdata + cur.msg_bufs)
+ p = bufdata;
+ 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)
+{
+
+#ifdef SMALL
+ (void)fprintf(stderr, "usage: dmesg\n");
+#else
+ (void)fprintf(stderr, "usage: dmesg [-M core] [-N system]\n");
+#endif
+ exit(1);
+}
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