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Annotation of 43BSDReno/sbin/savecore/savecore.8, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)savecore.8  6.5 (Berkeley) 6/24/90
        !            19: .\"
        !            20: .TH SAVECORE 8 "June 24, 1990"
        !            21: .UC 4
        !            22: .SH NAME
        !            23: savecore \- save a core dump of the operating system
        !            24: .SH SYNOPSIS
        !            25: .B savecore
        !            26: .I dirname
        !            27: [
        !            28: .I system
        !            29: ]
        !            30: .SH DESCRIPTION
        !            31: .I Savecore
        !            32: is meant to be called near the end of the /etc/rc file.  Its function
        !            33: is to save the core dump of the system (assuming one was made) and to
        !            34: write a reboot message in the shutdown log.
        !            35: .PP
        !            36: Savecore checks the core dump to be certain it corresponds with the
        !            37: current running unix.  If it does it saves the core image in the file
        !            38: .IR dirname /vmcore.n
        !            39: and its brother, the namelist,
        !            40: .IR dirname /vmunix.n
        !            41: The trailing ".n" in the pathnames is replaced by a number which grows
        !            42: every time
        !            43: .I savecore
        !            44: is run in that directory.
        !            45: .PP
        !            46: Before savecore writes out a core image, it reads a number from the file
        !            47: .IR dirname /minfree.
        !            48: If the number of free kilobytes on the filesystem which contains
        !            49: .I dirname
        !            50: is less than the number obtained from the minfree file,
        !            51: the core dump is not saved.
        !            52: If the minfree file does not exist, savecore always writes out the core
        !            53: file (assuming that a core dump was taken).
        !            54: .PP
        !            55: .I Savecore
        !            56: also logs a reboot message using facility LOG_AUTH (see
        !            57: .IR syslog (3))
        !            58: If the system crashed as a result of a panic,
        !            59: .I savecore
        !            60: logs the panic string too.
        !            61: .PP
        !            62: If the core dump was from a system other than /vmunix, the name
        !            63: of that system must be supplied as
        !            64: .IR sysname .
        !            65: .SH FILES
        !            66: .DT
        !            67: /vmunix                current UNIX
        !            68: .SH BUGS
        !            69: Can be fooled into thinking a core dump is the wrong size.

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