1f1ed24cc5
In batch mode, most messages go into the core.txt.N file instead of stdout. Reviewed by: jhb MFC after: 3 days Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D10429
116 lines
3.3 KiB
Groff
116 lines
3.3 KiB
Groff
.\" Copyright (c) 2008 Yahoo!, Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 19, 2017
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.Dt CRASHINFO 8
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.Os
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.Sh NAME
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.Nm crashinfo
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.Nd "analyze a core dump of the operating system"
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.Sh SYNOPSIS
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.Nm
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.Op Fl d Ar crashdir
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.Op Fl n Ar dumpnr
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.Op Fl k Ar kernel
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.Op Ar core
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.Sh DESCRIPTION
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The
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.Nm
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utility analyzes a core dump saved by
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.Xr savecore 8 .
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It generates a text file containing the analysis in the same directory as
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the core dump.
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For a given core dump file named
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.Pa vmcore.XX
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the generated text file will be named
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.Pa core.txt.XX .
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.Pp
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By default,
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.Nm
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analyzes the most recent core dump in the core dump directory.
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A specific core dump may be specified via either the
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.Ar core
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or
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.Ar dumpnr
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arguments.
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Once
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.Nm
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has located a core dump,
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it analyzes the core dump to determine the exact version of the kernel
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that generated the core.
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It then looks for a matching kernel file under each of the subdirectories in
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.Pa /boot .
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The location of the kernel file can also be explicitly provided via the
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.Ar kernel
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argument.
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.Pp
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Once
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.Nm
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has located a core dump and kernel,
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it uses several utilities to analyze the core including
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.Xr dmesg 8 ,
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.Xr fstat 1 ,
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.Xr iostat 8 ,
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.Xr ipcs 1 ,
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.Xr kgdb 1 ,
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.Xr netstat 1 ,
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.Xr nfsstat 1 ,
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.Xr ps 1 ,
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.Xr pstat 8 ,
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and
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.Xr vmstat 8 .
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl b
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Run in batch mode. Write most messages to the
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.Pa core.txt.XX
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file instead of the terminal. This flag is used when
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.Nm
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is run during boot.
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.It Fl d Ar crashdir
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Specify an alternate core dump directory.
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The default crash dump directory is
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.Pa /var/crash .
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.It Fl n Ar dumpnr
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Use the core dump saved in
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.Pa vmcore. Ns Ar dumpnr
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instead of the latest core in the core dump directory.
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.It Fl k Ar kernel
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Specify an explicit kernel file.
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.El
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.Sh SEE ALSO
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.Xr textdump 4 ,
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.Xr savecore 8
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.Sh HISTORY
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The
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.Nm
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utility appeared in
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.Fx 6.4 .
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