SAVECORE(8) System Manager's Manual SAVECORE(8)
savecore - save a core dump of the operating system
/etc/savecore dirname [ system ]
Savecore is meant to be called near the end of the /etc/rc file. Its
function is to save the core dump of the system (assuming one was made)
and to write a reboot message in the shutdown log.
Savecore checks the core dump to be certain it corresponds with the
current running unix. If it does it saves the core image in the file
dirname/vmcore.n and it's brother, the namelist, dirname/vmunix.n The
trailing ".n" in the pathnames is replaced by a number which grows
every time savecore is run in that directory.
Before savecore writes out a core image, it reads a number from the
file dirname/minfree. If there are fewer free blocks on the filesystem
which contains dirname than the number obtained from the minfree file,
the core dump is not done. If the minfree file does not exist,
savecore always writes out the core file (assuming that a core dump was
Savecore also writes a reboot message in the shut down log. If the
system crashed as a result of a panic, savecore records the panic
string in the shut down log too.
If the core dump was from a system other than /vmunix, the name of that
system must be supplied as sysname.
/usr/adm/shutdownlog shut down log
/vmunix current UNIX
Can be fooled into thinking a core dump is the wrong size.
4th Berkeley Distribution 28 April 1981 SAVECORE(8)