head	1.3;
access;
symbols;
locks; strict;
comment	@# @;


1.3
date	96.10.20.12.51.32;	author alexis;	state Exp;
branches;
next	1.2;

1.2
date	96.10.12.09.32.37;	author alexis;	state Exp;
branches;
next	1.1;

1.1
date	96.10.05.09.06.29;	author alexis;	state Exp;
branches;
next	;


desc
@ONLINE BACKUP PROGRAM
@


1.3
log
@Modified messages slightly.
@
text
@#!/bin/sh
PROGNAME=`basename $0`
VERSION=`echo '$Id: olbu,v 1.2 1996/10/12 09:32:37 alexis Exp alexis $' | cut -f3 -d' '`

FLAG_FILE=/var/local/lib/$PROGNAME.last
OLBU_DIR=/big/olbu
DEBUG_LEVEL=2

info()
{
    [ $DEBUG_LEVEL -ge 3 ] && echo "$PROGNAME: INFO: $1"
}

error()
{
    [ $DEBUG_LEVEL -ge 1 ] && echo "$PROGNAME: ERROR: $1"
    exit 1
}

warning()
{
    [ $DEBUG_LEVEL -ge 2 ] && echo "$PROGNAME: WARNING: $1"
}

debug()
{
    [ $DEBUG_LEVEL -ge $1 ] && echo "$PROGNAME: DEBUG[$1]: $2"
}

usage()
{
    echo "Usage: $PROGNAME [ -v | -d level ] <days>"
    echo "       $PROGNAME -V"

    exit 1
}

main()
{
    while [ "X$1" != X ]; do
        case "$1" in
            -V) echo "$PROGNAME version $VERSION"
                exit 0 ;;
            -v) DEBUG_LEVEL=3 ;;
            -d) [ "X$2" = X ] && usage
                DEBUG_LEVEL=$2
                shift ;;
            -*) usage ;;
            *)  break ;;
        esac
        shift
    done

    [ "X$1" = X ] && usage
    INTERVAL=$1

    [ `id | sed 's/^uid=\([0-9][0-9]*\)(.*/\1/'` -eq 0 ] || error "you must be root to use this program"

    DAY_THIS_RUN=`date '+%j'`
    if [ ! -f $FLAG_FILE ]; then
        #  it's not the echo that can't create the output file, but this shell
        #  hence the redirection is outside the brackets and not inside.
        { echo "-99999" > $FLAG_FILE; } 2>/dev/null
        [ ! -f $FLAG_FILE ] && error "cannot access $FLAG_FILE"
    fi

    [ ! -d $OLBU_DIR ] && error "$OLBU_DIR: no such directory"

    read DAY_LAST_RUN < $FLAG_FILE
    expr "$DAY_LAST_RUN" : "^[-]?[0-9][0-9]*$" > /dev/null || error "invalid day number in $FLAG_FILE'"
    [ $DAY_LAST_RUN -gt $DAY_THIS_RUN ] && DAY_LAST_RUN=`expr $DAY_LAST_RUN - 365`
    debug 5 "today: $DAY_THIS_RUN, last: $DAY_LAST_RUN, mininterval: $INTERVAL"
    [ `expr $DAY_THIS_RUN - $DAY_LAST_RUN` -lt $INTERVAL ] && {
        echo "already run in last $INTERVAL days"
        exit 0
    }

    echo "backing up in background"
    ( 
        for DIR in /home/*; do
            [ ! -f $DIR/.makeolbu ] && { debug 5 "skipping $DIR"; continue; }
            debug 5 "copying $DIR ..."
            # tar reports it's stripping leading slashes
            [ ! -d $OLBU_DIR/`basename $DIR` ] && mkdir $OLBU_DIR/`basename $DIR`
            nice -n 19 tar cf - $DIR 2>/dev/null | gzip > $OLBU_DIR/`basename $DIR`/olbu.tar.gz
            chown -R `basename $DIR` $OLBU_DIR/`basename $DIR`
        done

        echo "$DAY_THIS_RUN" > $FLAG_FILE
    ) &
}


main "$@@"
exit 0
@


1.2
log
@fixed messaging functions to take account of debug level.
@
text
@d3 1
a3 1
VERSION=`echo '$Id: olbu,v 1.1 1996/10/05 09:06:29 alexis Exp alexis $' | cut -f3 -d' '`
d74 1
a74 1
        info "already run today"
d78 1
d84 1
@


1.1
log
@Initial revision
@
text
@d3 1
a3 1
VERSION=`echo '$Id$' | cut -f3 -d' '`
d11 1
a11 1
    echo "$PROGNAME: INFO: $1"
d16 1
a16 1
    echo "$PROGNAME: ERROR: $1"
d22 1
a22 1
    echo "$PROGNAME: WARNING: $1"
d84 1
a84 1
            chown `basename $DIR` $OLBU_DIR/`basename $DIR`/olbu.tar.gz
@