NAME    [Toc]    [Back]

     savecore - save a core dump of the operating system

SYNOPSIS    [Toc]    [Back]

     savecore -c
     savecore [-fvz] [-N system] directory

DESCRIPTION    [Toc]    [Back]

     savecore copies the currently running kernel and its associated core dump
     into  directory, and enters a reboot message and information
about the
     core dump into the system log.

     The options are as follows:

     -c      Clears the  dump,  so  that  future  invocations  of
savecore will ignore
 it.

     -f       Forces  a dump to be taken even if the dump doesn't
appear correct
             or there is insufficient disk space.

     -N system
             Use system as the  kernel  instead  of  the  default
/bsd.

     -v      Prints out some additional debugging information.

     -z       Compresses  the  core  dump  and  kernel  (see compress(1)).

     savecore checks the core dump in various ways to  make  sure
that it is
     current  and  that  it  corresponds to the currently running
system.  If it
     passes  these  checks,  it   saves   the   core   image   in
directory/bsd.#.core and
     the  system in directory/bsd.# (or in directory/bsd.#.core.Z
and
     directory/bsd.#.Z, respectively, if the -z option is  used).
The ``#'' is
     the number from the first line of the file directory/bounds,
and it is
     incremented and stored back into the file each time savecore
successfully
     runs.

     savecore  also  checks  the  available disk space before attempting to make
     the copies.  If there is  insufficient  disk  space  in  the
filesystem containing
  directory,  or if the file directory/minfree exists
and the number
     of free kilobytes (for non-superusers) in the filesystem after the copies
     were made would be less than the number in the first line of
this file,
     the copies are not attempted.

     If savecore successfully copies  the  kernel  and  the  core
dump, the core
     dump  is cleared so that future invocations of savecore will
ignore it.

     savecore is meant to be called near the end of the  initialization file
     /etc/rc (see rc(8)).

FILES    [Toc]    [Back]

     /bsd    current kernel

SEE ALSO    [Toc]    [Back]

     compress(1), syslogd(8)

HISTORY    [Toc]    [Back]

     The savecore command appeared in 4.1BSD.

BUGS    [Toc]    [Back]

     The  minfree  code  does not consider the effect of compression.

OpenBSD      3.6                           June      5,      1993