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 38.Sh NAME 39.Nm savecore 40.Nd "save a core dump of the operating system" 41.Sh SYNOPSIS 42.Nm 43.Fl c 44.Nm 45.Op Fl fkvz 46.Op Ar directory Op Ar device ... 47.Sh DESCRIPTION 48.Nm Savecore 49copies a core dump into 50.Fa directory , 51or the current working directory if no 52.Fa directory 53argument is given, 54and enters a reboot message and information about the core dump into 55the system log. 56.Pp 57The options are as follows: 58.Bl -tag -width indent 59.It Fl c 60Clear the dump, so that future invocations of 61.Nm 62will ignore it. 63.It Fl f 64Force a dump to be taken even if the dump was cleared. 65.It Fl k 66Do not clear the dump after saving it. 67.It Fl v 68Print out some additional debugging information. 69.It Fl z 70Compress the core dump and kernel (see 71.Xr gzip 1 ) . 72.El 73.Pp 74.Nm Savecore 75looks for dumps on each device specified by the 76.Ar device 77argument(s), or on each device in 78.Pa /etc/fstab 79marked as "dump" or "swap". 80.Nm Savecore 81checks the core dump in various ways to make sure that it is complete. 82If it passes these checks, it saves the core image in 83.Ar directory Ns Pa /vmcore.# 84and information about the core in 85.Ar directory Ns Pa /info.# 86The ``#'' is the number from the first line of the file 87.Ar directory Ns Pa /bounds , 88and it is incremented and stored back into the file each time 89.Nm 90successfully runs. 91.Pp 92.Nm Savecore 93also checks the available disk space before attempting to make the copies. 94If there is insufficient disk space in the filesystem containing 95.Ar directory , 96or if the file 97.Ar directory Ns Pa /minfree 98exists and the number of free kilobytes (for non-superusers) in the 99filesystem after the copies were made would be less than the number 100in the first line of this file, the copies are not attempted. 101.Pp 102If 103.Nm 104successfully copies the kernel and the core dump, the core dump is cleared 105so that future invocations of 106.Nm 107will ignore it. 108.Pp 109.Nm Savecore 110is meant to be called near the end of the initialization file 111.Pa /etc/rc 112(see 113.Xr rc 8 ) . 114.Sh BUGS 115The minfree code does not consider the effect of compression or sparse files. 116.Sh SEE ALSO 117.Xr gzip 1 , 118.Xr getbootfile 3 , 119.Xr dumpon 8 , 120.Xr syslogd 8 121.Sh HISTORY 122The 123.Nm 124command appeared in 125.Bx 4.1 . 126