PC World 2000 February/PCWorld_2000-02_cd.bin/live/usr/sbin/MAKEFLOPPIES

Text File | 1999-01-24 | 5KB | 252 lines

#!/bin/sh
#
# MAKEFLOP
#
# requires: expr
# Note quirk of expr: if it prints "0", it always
# returns "1" regardless of whether this makes sense!
#
# 1995.01.03    David Niemi    Created

set -e
set -u
MAJOR=2
TMPDEVICE=/dev/tmpfloppy$$
if floppycontrol 2>/dev/null; then
    FLOPPYCONTROL=yes
else
    FLOPPYCONTROL=no
fi

MINORNAMES='d360 h1200 D360 D720 h360 h720 H1440 E2880
    CompaQ h1440 H1680 h410 H820 h1476 H1722 h420
    H830 h1494 H1743 h880 D1040 D1120 h1600 H1760
    H1920 E3200 E3520 E3840 H1840 D800 H1600'

CMOSNAMES='360K_PC 1.2M_AT 720K 1.44M 2.88M_AMI_BIOS 2.88M'

## Used only with -t option
CMOSLETTERS='d h D H E E'
UCMOSLETTERS='d h u u u u'
CMOSFORMATS='d h D DH DHE DHE'

LOCAL=
DRIVES=
USAGE=
TYPE_OVERRIDE=u
REMAINDER=
DRYRUN=
VERBOSE=


## getword nth parameter of all the subsequent parameters
getword ()
{    if [ $# -lt 1 ]; then
        return
    fi
    if [ "$1" -lt 1 -o "$1" -ge $# ]; then
        return
    fi
    shift $1
    echo $1
}

basenumber()
{
    if [ $1 -ge 4 ] ; then
        expr $1 + 124
    else
        echo $1
    fi
}

minorname ()
{    if [ "$FLOPPYCONTROL" = no ]; then
        ## No floppycontrol program, so use default values
        getword "$1" $MINORNAMES
    else
        rm -f "$TMPDEVICE"
        mknod "$TMPDEVICE" b "$MAJOR" "$1"
        floppycontrol -T "$TMPDEVICE" 2>/dev/null || :
        rm -f "$TMPDEVICE"
    fi

}

cmosid ()
{
    if [ "$FLOPPYCONTROL" = yes ]; then
        case `minorname $1` in
        d360)        echo 1 ;;
        h1200)        echo 2 ;;
        D720)        echo 3 ;;
        H1440)        echo 4 ;;
        E2880)        echo 6 ;;
        "(null)")    echo none ;;
        "")        echo none ;;
        *)        echo unknown ;;
        esac
    elif [ "$1" = 0 ]; then
        echo 4        # 1.44MB default for drive 0
    elif [ "$1" = 1 ]; then
        echo 2        # 1.2MB AT default for drive 1
    else
        echo none    # Nothing for everybody else
    fi
}

# main()

PERMISSION=666
while [ $# -ge 1 -o -n "${REMAINDER}" ]; do
    if [ -n "$REMAINDER" ]; then
        ## Continue processing options stuck together
        ARG=$REMAINDER
    else
        ## Get a fresh argument
        ARG=$1
        shift
        case "$ARG" in

        ## Remove dash in front of option(s)
        -?*)
            ARG=`expr "-$ARG" : '-*\(.*\)' || :`
            ;;
        esac
    fi

    ## Break compound options up
    case "$ARG" in
    ??*)    REMAINDER=`expr "$ARG" : '.\(.*\)' || :`
        ARG=`expr "$ARG" : '\(.\)' || :`
        ;;
    *)    REMAINDER= ;;
    esac

    case $ARG in

    ## Process drive number(s)
    [0-7])    DRIVES="$DRIVES $ARG" ;;

    [nN])    DRYRUN=yes ;;

    ## Make devices in current directory, not /dev
    [lL])    LOCAL=yes ;;

    ## Base device name on drive type
    [tT])    TYPE_OVERRIDE=yes ;;
    [dD])    TYPE_OVERRIDE=yes ;;

    ## Base device name on media type
    [mM])    TYPE_OVERRIDE=no ;;

    ## New naming scheme
    [uU])    TYPE_OVERRIDE=no ;;

    [vV])    VERBOSE=yes ;;

    ## Allow access only for group floppy
    [gG])    PERMISSION=660 ;;

    *)    echo "$0: unrecognized argument \"$ARG\"." >&2
        USAGE=yes
        ;;
    esac
done

if [ -n "$USAGE" ]; then
    echo "Usage: $0 [ <option> ... ] [ <drive #> ... ]" >&2
    echo 'Options:
    -l    Local (make files in local directory, not /dev)
    -n    Dry run (just report what would be done, do not do anything)
    -t    Name devices for drive type
    -d    Name devices for drive type
    -m    Name devices for media type
    -u    Use the same letter (u) for all 3 1/2 devices
    -g    Allow access only for group floppy
    -v    Verbose
' >&2
    exit 1
fi

if [ -z "$DRIVES" ]; then
    DRIVES="0 1 2 3 4 5 6 7"
fi

for DRIVE in $DRIVES; do
    if [ -n "$LOCAL" ]; then
        FILE=fd$DRIVE
    else
        FILE=/dev/fd$DRIVE
    fi
    BASENUMBER=`basenumber $DRIVE`
    CMOS=`cmosid "$BASENUMBER"`
    if [ $CMOS = none ] ; then
        echo "Drive $DRIVE is not installed or not configured, skipping"
        continue
    fi

    if [ $CMOS = unknown ] ; then
        echo "Drive $DRIVE is of unknown type, skipping"
        continue
    fi

    CN=`getword "$CMOS" $CMOSNAMES`

    if [ "$TYPE_OVERRIDE" = u ]; then
        CL=`getword "$CMOS" $UCMOSLETTERS`
    else
        CL=`getword "$CMOS" $CMOSLETTERS`
    fi

    FORMATS=`getword "$CMOS" $CMOSFORMATS`
    if [ -n "$VERBOSE" -o -n "$DRYRUN" ]; then
        echo rm -f "$FILE"*
    fi
    if [ -z "$DRYRUN" ]; then
        rm -f "$FILE"*
    fi
    if [ -z "$CMOS" -o -z "$CN" ]; then
        echo "Skipping invalid drive \"$FILE\"" >&2
        continue
    fi
    echo "Creating \"$FILE\", ID=$DRIVE, Type=$CMOS ($CN)"
    if [ -z "$DRYRUN" ]; then
        mknod "$FILE" b "$MAJOR" "$BASENUMBER"
        chown root.floppy "$FILE"
        chmod ${PERMISSION} "$FILE"
    fi
    if [ -n "$VERBOSE" -o -n "$DRYRUN" ]; then
        echo mknod "$FILE" b "$MAJOR" "$BASENUMBER"
    fi

    ## Todo: query about tracks and such (for now assume 80 only)

    BASE=4
    while [ $BASE -lt 128 ] ; do
        MINOR=`expr "$BASE" + "$BASENUMBER" || :`
        NAME=`minorname "$BASE"`
        if expr index "$FORMATS" "$NAME" >/dev/null ; then
            if [ "$TYPE_OVERRIDE" != no ]; then
                NAME=`echo $NAME | sed "s/^./$CL/g"`
            fi

            if [ -z    "$NAME" ]; then
                echo "Oops, skipping invalid format \"$FORMAT\"" >&2
                continue
            fi
            if [ -z "$DRYRUN" ]; then
                mknod "${FILE}${NAME}" b "$MAJOR" "$MINOR"
                chown root.floppy "${FILE}${NAME}"
                chmod ${PERMISSION} "${FILE}${NAME}"
            fi
            if [ -n "$VERBOSE" -o -n "$DRYRUN" ]; then
                echo mknod "${FILE}${NAME}" b "$MAJOR" "$MINOR"
            fi
        fi
        BASE=`expr $BASE + 4`
    done
done

## END ##