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.\" @(#)savecore.8 8.1 (Berkeley) 6/5/93 33.\" 34.Dd June 5, 1993 35.Dt SAVECORE 8 36.Os BSD 4 37.Sh NAME 38.Nm savecore 39.Nd "save a core dump of the operating system" 40.Sh SYNOPSIS 41.Nm savecore 42.Fl c 43.Nm savecore 44.Op Fl fvz 45.Op Fl N Ar system 46.Ar directory 47.Sh DESCRIPTION 48.Nm Savecore 49copies the currently running kernel and its associated core dump into 50.Fa directory , 51and enters a reboot message and information about the core dump into 52the system log. 53.Pp 54The options are as follows: 55.Bl -tag -width directory 56.It Fl c 57Clears the dump, so that future invocations of 58.Nm savecore 59will ignore it. 60.It Fl f 61Forces a dump to be taken even if the dump doesn't appear correct or there 62is insufficient disk space. 63.It Fl N 64Use 65.Ar system 66as the kernel instead of the default ``/vmunix''. 67.It Fl v 68Prints out some additional debugging information. 69.It Fl z 70Compresses the core dump and kernel (see 71.Xr compress 1 ). 72.El 73.Pp 74.Nm Savecore 75checks the core dump in various ways to make sure that it is current and 76that it corresponds to the currently running system. 77If it passes these checks, it saves the core image in 78.Ar directory Ns Pa /vmcore.# 79and the system in 80.Ar directory Ns Pa /vmunix.# 81The ``#'' is the number from the first line of the file 82.Ar directory Ns Pa /bounds , 83and it is incremented and stored back into the file each time 84.Nm savecore 85successfully runs. 86.Pp 87.Nm Savecore 88also checks the available disk space before attempting to make the copies. 89If there is insufficient disk space in the filesystem containing 90.Ar directory , 91or if the file 92.Ar directory Ns Pa /minfree 93exists and the number of free kilobytes (for non-superusers) in the 94filesystem after the copies were made would be less than the number 95in the first line of this file, the copies are not attempted. 96.Pp 97If 98.Nm savecore 99successfully copies the kernel and the core dump, the core dump is cleared 100so that future invocations of 101.Nm savecore 102will ignore it. 103.Pp 104.Nm Savecore 105is meant to be called near the end of the initialization file 106.Pa /etc/rc 107(see 108.Xr rc 8 ) . 109.Sh FILES 110.Bl -tag -width /vmunixxx -compact 111.It Pa /vmunix 112current 113.Tn UNIX 114.El 115.Sh BUGS 116The minfree code does not consider the effect of compression. 117.Sh SEE ALSO 118.Xr compress 1 , 119.Xr syslogd 8 120.Sh HISTORY 121The 122.Nm 123command appeared in 124.Bx 4.1 . 125