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[src/trunk]: src/sbin/dmesg Handle new timestamp sequences.
details: https://anonhg.NetBSD.org/src/rev/d46372b9e21e
branches: trunk
changeset: 321706:d46372b9e21e
user: christos <christos%NetBSD.org@localhost>
date: Sun Apr 01 19:31:16 2018 +0000
description:
Handle new timestamp sequences.
diffstat:
sbin/dmesg/dmesg.8 | 9 +++-
sbin/dmesg/dmesg.c | 115 +++++++++++++++++++++++++++++++++++++++++-----------
2 files changed, 96 insertions(+), 28 deletions(-)
diffs (228 lines):
diff -r fac7d1c2b49a -r d46372b9e21e sbin/dmesg/dmesg.8
--- a/sbin/dmesg/dmesg.8 Sun Apr 01 19:29:43 2018 +0000
+++ b/sbin/dmesg/dmesg.8 Sun Apr 01 19:31:16 2018 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: dmesg.8,v 1.17 2016/09/11 02:24:00 sevan Exp $
+.\" $NetBSD: dmesg.8,v 1.18 2018/04/01 19:31:16 christos Exp $
.\"
.\" Copyright (c) 1980, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@@ -29,7 +29,7 @@
.\"
.\" @(#)dmesg.8 8.1 (Berkeley) 6/5/93
.\"
-.Dd September 11, 2016
+.Dd March 31, 2018
.Dt DMESG 8
.Os
.Sh NAME
@@ -37,6 +37,7 @@
.Nd "display the system message buffer"
.Sh SYNOPSIS
.Nm
+.Op Fl qt
.Op Fl M Ar core
.Op Fl N Ar system
.Sh DESCRIPTION
@@ -51,6 +52,10 @@
.It Fl N
Extract the name list from the specified system instead of the default
``/netbsd''.
+.It Fl q
+Quiet printing, don't print timestamps.
+.It Fl t
+Format uptime timestamps in a human readable form.
.El
.Pp
The system message buffer is a circular buffer of a fixed size.
diff -r fac7d1c2b49a -r d46372b9e21e sbin/dmesg/dmesg.c
--- a/sbin/dmesg/dmesg.c Sun Apr 01 19:29:43 2018 +0000
+++ b/sbin/dmesg/dmesg.c Sun Apr 01 19:31:16 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: dmesg.c,v 1.27 2011/08/29 14:34:59 joerg Exp $ */
+/* $NetBSD: dmesg.c,v 1.28 2018/04/01 19:31:16 christos Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
@@ -38,7 +38,7 @@
#if 0
static char sccsid[] = "@(#)dmesg.c 8.1 (Berkeley) 6/5/93";
#else
-__RCSID("$NetBSD: dmesg.c,v 1.27 2011/08/29 14:34:59 joerg Exp $");
+__RCSID("$NetBSD: dmesg.c,v 1.28 2018/04/01 19:31:16 christos Exp $");
#endif
#endif /* not lint */
@@ -48,6 +48,7 @@
#include <err.h>
#include <fcntl.h>
+#include <time.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>
@@ -73,16 +74,27 @@
main(int argc, char *argv[])
{
struct kern_msgbuf cur;
- int ch, newl, skip, i;
+ int ch, newl, log, i;
+ size_t tstamp, size;
char *p, *bufdata;
+ char buf[5];
#ifndef SMALL
+ char tbuf[64];
char *memf, *nlistf;
-#endif
- char buf[5];
+ struct timeval boottime;
+ int ptime = 0;
+
+ static const int bmib[] = { CTL_KERN, KERN_BOOTTIME };
+ size = sizeof(boottime);
-#ifndef SMALL
+ boottime.tv_sec = 0;
+ boottime.tv_usec = 0;
+ ptime = 0;
+
+ (void)sysctl(bmib, 2, &boottime, &size, NULL, 0);
+
memf = nlistf = NULL;
- while ((ch = getopt(argc, argv, "M:N:")) != -1)
+ while ((ch = getopt(argc, argv, "M:N:qt")) != -1)
switch(ch) {
case 'M':
memf = optarg;
@@ -90,6 +102,12 @@
case 'N':
nlistf = optarg;
break;
+ case 'q':
+ ptime = -1;
+ break;
+ case 't':
+ ptime = 1;
+ break;
case '?':
default:
usage();
@@ -99,15 +117,11 @@
if (memf == NULL) {
#endif
- size_t size;
- int mib[2];
+ static const int mmib[2] = { CTL_KERN, KERN_MSGBUF };
- mib[0] = CTL_KERN;
- mib[1] = KERN_MSGBUF;
-
- if (sysctl(mib, 2, NULL, &size, NULL, 0) == -1 ||
+ if (sysctl(mmib, 2, NULL, &size, NULL, 0) == -1 ||
(bufdata = malloc(size)) == NULL ||
- sysctl(mib, 2, bufdata, &size, NULL, 0) == -1)
+ sysctl(mmib, 2, bufdata, &size, NULL, 0) == -1)
err(1, "can't get msgbuf");
/* make a dummy struct msgbuf for the display logic */
@@ -159,22 +173,70 @@
* over cur.msg_bufs times. Unused area is skipped since it
* contains nul.
*/
- for (newl = skip = i = 0, p = bufdata + cur.msg_bufx;
+ for (tstamp = 0, newl = 1, log = i = 0, p = bufdata + cur.msg_bufx;
i < cur.msg_bufs; i++, p++) {
#ifndef SMALL
if (p == bufdata + cur.msg_bufs)
p = bufdata;
+#define ADDC(c) \
+ do \
+ if (tstamp < sizeof(tbuf) - 1) \
+ tbuf[tstamp++] = (c); \
+ while (/*CONSTCOND*/0)
+#else
+#define ADDC(c)
#endif
ch = *p;
/* Skip "\n<.*>" syslog sequences. */
- if (skip) {
- if (ch == '>')
- newl = skip = 0;
- continue;
- }
- if (newl && ch == '<') {
- skip = 1;
- continue;
+ /* Gather timestamp sequences */
+ if (newl) {
+ switch (ch) {
+ case '[':
+ ADDC(ch);
+ continue;
+ case '<':
+ log = 1;
+ continue;
+ case '>':
+ log = newl = 0;
+ continue;
+ case ']':
+ ADDC(ch);
+ ADDC('\0');
+ tstamp = 0;
+#ifndef SMALL
+ if (ptime == 1) {
+ intmax_t sec;
+ time_t t;
+ long nsec;
+ struct tm tm;
+
+ sscanf(tbuf, "[%jd.%ld]", &sec, &nsec);
+ t = boottime.tv_sec + sec;
+ if (localtime_r(&t, &tm) != NULL) {
+ strftime(tbuf, sizeof(tbuf),
+ "[%a %b %e %H:%M:%S %Z %Y]",
+ &tm);
+ printf("%s ", tbuf);
+ }
+ continue;
+ } else if (ptime != -1)
+ printf("%s ", tbuf);
+#endif
+ continue;
+ case ' ':
+ if (!tstamp)
+ continue;
+ /*FALLTHROUGH*/
+ default:
+ if (tstamp) {
+ ADDC(ch);
+ continue;
+ }
+ if (log)
+ continue;
+ break;
+ }
}
if (ch == '\0')
continue;
@@ -189,7 +251,7 @@
}
if (!newl)
(void)putchar('\n');
- exit(0);
+ return EXIT_SUCCESS;
}
#ifndef SMALL
@@ -197,7 +259,8 @@
usage(void)
{
- (void)fprintf(stderr, "usage: dmesg [-M core] [-N system]\n");
- exit(1);
+ (void)fprintf(stderr, "Usage: %s [-qt] [-M core] [-N system]\n",
+ getprogname());
+ exit(EXIT_FAILURE);
}
#endif
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