1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" From: @(#)savecore.8 8.1 (Berkeley) 6/5/93 33.\" $FreeBSD$ 34.\" 35.Dd September 23, 1994 36.Dt SAVECORE 8 37.Os BSD 4 38.Sh NAME 39.Nm savecore 40.Nd "save a core dump of the operating system" 41.Sh SYNOPSIS 42.Nm savecore 43.Fl c 44.Nm savecore 45.Op Fl fvz 46.Op Fl N Ar system 47.Ar directory 48.Sh DESCRIPTION 49.Nm Savecore 50copies the currently running kernel and its associated core dump into 51.Fa directory , 52and enters a reboot message and information about the core dump into 53the system log. 54.Pp 55The options are as follows: 56.Bl -tag -width indent 57.It Fl c 58Clear the dump, so that future invocations of 59.Nm 60will ignore it. 61.It Fl f 62Force a dump to be taken even if the dump doesn't appear correct or there 63is insufficient disk space. 64.It Fl N 65Use 66.Ar system 67as the kernel instead of the running kernel (as determined from 68.Xr getbootfile 3 ). 69.It Fl v 70Print out some additional debugging information. 71.It Fl z 72Compress the core dump and kernel (see 73.Xr compress 1 ). 74.El 75.Pp 76.Nm Savecore 77checks the core dump in various ways to make sure that it is current and 78that it corresponds to the currently running system. 79If it passes these checks, it saves the core image in 80.Ar directory Ns Pa /vmcore.# 81and the system in 82.Ar directory Ns Pa /kernel.# 83The ``#'' is the number from the first line of the file 84.Ar directory Ns Pa /bounds , 85and it is incremented and stored back into the file each time 86.Nm 87successfully runs. 88.Pp 89.Nm Savecore 90also checks the available disk space before attempting to make the copies. 91If there is insufficient disk space in the filesystem containing 92.Ar directory , 93or if the file 94.Ar directory Ns Pa /minfree 95exists and the number of free kilobytes (for non-superusers) in the 96filesystem after the copies were made would be less than the number 97in the first line of this file, the copies are not attempted. 98.Pp 99If 100.Nm 101successfully copies the kernel and the core dump, the core dump is cleared 102so that future invocations of 103.Nm 104will ignore it. 105.Pp 106.Nm Savecore 107is meant to be called near the end of the initialization file 108.Pa /etc/rc 109(see 110.Xr rc 8 ) . 111.Sh BUGS 112The minfree code does not consider the effect of compression. 113.Sh SEE ALSO 114.Xr compress 1 , 115.Xr getbootfile 3 , 116.Xr syslogd 8 117.Sh HISTORY 118The 119.Nm 120command appeared in 121.Bx 4.1 . 122