V8/usr/man/man8/savecore.8

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.TH SAVECORE 8
.SH NAME
savecore \- save a core dump of the operating system
.SH SYNOPSIS
.B /etc/savecore
dirname
[
unix
]
.SH DESCRIPTION
.I Savecore
saves a copy of the physical memory of the operating system, saved
after a system crash.
It is meant to be called from
.IR rc (8)
after normal filesystems are
mounted.
.PP
.I Savecore
checks the core dump to be certain it corresponds with the named
.I unix
(default `/unix').
If it does it saves the core image in the file
.IR dirname /core.n
and its sibling, the namelist, in
.IR dirname /unix.n.\ 
The trailing `.n' in the pathnames is replaced by a number stored in
.IR dirname /bounds
which grows every time
.I savecore
is run with the same
.I dirname
argument.
.PP
Before
.I savecore
writes out a core image, it reads a number from the file
.IR dirname /minfree.
If there are fewer free kilobytes on the filesystem
which contains
.I dirname
than the number obtained from the minfree file, the core dump is not done.
If the minfree file does not exist,
.I savecore
always writes out the core
file (assuming that a core dump was taken).
.SH FILES
.tr ~
.ta \w'/usr/adm/shutdownlog  'u
.br
/unix			current unix binary
.br
.IR dirname /bounds	numerical~suffix
.br
.IR dirname /minfree	minimum~free~kilobytes~required