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 48The 49.Nm 50utility 51copies a core dump into 52.Ar directory , 53or the current working directory if no 54.Ar directory 55argument is given, 56and enters a reboot message and information about the core dump into 57the system log. 58.Pp 59The options are as follows: 60.Bl -tag -width indent 61.It Fl c 62Clear the dump, so that future invocations of 63.Nm 64will ignore it. 65.It Fl f 66Force a dump to be taken even if the dump was cleared. 67.It Fl k 68Do not clear the dump after saving it. 69.It Fl v 70Print out some additional debugging information. 71.It Fl z 72Compress the core dump and kernel (see 73.Xr gzip 1 ) . 74.El 75.Pp 76The 77.Nm 78utility 79looks for dumps on each device specified by the 80.Ar device 81argument(s), or on each device in 82.Pa /etc/fstab 83marked as 84.Dq dump 85or 86.Dq swap . 87The 88.Nm 89utility 90checks the core dump in various ways to make sure that it is complete. 91If it passes these checks, it saves the core image in 92.Ar directory Ns Pa /vmcore.# 93and information about the core in 94.Ar directory Ns Pa /info.# 95The ``#'' is the number from the first line of the file 96.Ar directory Ns Pa /bounds , 97and it is incremented and stored back into the file each time 98.Nm 99successfully runs. 100.Pp 101The 102.Nm 103utility 104also checks the available disk space before attempting to make the copies. 105If there is insufficient disk space in the filesystem containing 106.Ar directory , 107or if the file 108.Ar directory Ns Pa /minfree 109exists and the number of free kilobytes (for non-superusers) in the 110filesystem after the copies were made would be less than the number 111in the first line of this file, the copies are not attempted. 112.Pp 113If 114.Nm 115successfully copies the kernel and the core dump, the core dump is cleared 116so that future invocations of 117.Nm 118will ignore it. 119.Pp 120The 121.Nm 122utility 123is meant to be called near the end of the initialization file 124.Pa /etc/rc 125(see 126.Xr rc 8 ) . 127.Sh BUGS 128The minfree code does not consider the effect of compression or sparse files. 129.Sh SEE ALSO 130.Xr gzip 1 , 131.Xr getbootfile 3 , 132.Xr dumpon 8 , 133.Xr syslogd 8 134.Sh HISTORY 135The 136.Nm 137command appeared in 138.Bx 4.1 . 139