7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
95 lines
3.0 KiB
Groff
95 lines
3.0 KiB
Groff
.\" Copyright (c) 1983, 1990, 1992, 1993
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.\" The Regents of the University of California. 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 University nor the names of its 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 REGENTS 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 REGENTS 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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.\" @(#)gcore.1 8.2 (Berkeley) 4/18/94
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.\" $FreeBSD$
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.\"
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.Dd July 13, 2016
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.Dt GCORE 1
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.Os
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.Sh NAME
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.Nm gcore
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.Nd get core images of running process
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.Sh SYNOPSIS
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.Nm
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.Op Fl f
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.Op Fl c Ar core
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.Op Ar executable
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.Ar pid
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.Sh DESCRIPTION
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The
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.Nm
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utility creates a core image of the specified process,
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suitable for use with
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.Xr gdb 1 .
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By default, the core is written to the file
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.Dq Pa core.<pid> .
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The process identifier,
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.Ar pid ,
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must be given on the command line.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl c
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Write the core file to the specified file instead of
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.Dq Pa core.<pid> .
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.It Fl f
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Dumps all available segments, excluding only malformed and undumpable segments.
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Unlike the default invocation, this flag dumps mappings of devices which
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may invalidate the state of device transactions or trigger other unexpected
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behavior.
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As a result, this flag should only be used when the behavior of the
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application and any devices it has mapped is fully understood and any side
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effects can be controlled or tolerated.
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.El
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.Sh FILES
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.Bl -tag -width /var/log/messages -compact
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.It Pa core.<pid>
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the core image
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.El
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.Sh HISTORY
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A
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.Nm
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utility appeared in
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.Bx 4.2 .
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.Sh BUGS
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Because of the
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.Xr ptrace 2
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usage
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.Nm
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may not work with processes which are actively being investigated with
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.Xr truss 1
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or
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.Xr gdb 1 .
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Additionally, interruptable sleeps may exit with EINTR.
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.Pp
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The
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.Nm
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utility is not compatible with the original
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.Bx 4.2
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version.
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