quickinst

LINUX lilo-22.7 源代码。

#!/bin/sh
<<@

LILO QUICK INSTALLATION	                      Version 22.5 of 15-Dec-2003
-----------------------                       ---------------------------

This installation script installs LILO and generates the configuration file
/etc/lilo.conf. It uses safe defaults for most configuration options.
Please read the documentation (preferably the more complete LaTeX version,
doc.tex) before making changes to the configuration generated by QuickInst.

To run QuickInst, simply type

./QuickInst

If the normally used root partition is mounted below root (e.g. during
system installation), set the environment variable ROOT to the name of the
directory on which the root partition is mounted and run QuickInst, e.g.

ROOT=/root ./QuickInst

A subshell can be spawned at each prompt. Type  !  to get an interactive
shell that has to be left with  exit . Type  !command args ...  to execute
a command and immediately return to QuickInst.

QuickInst can only be used to install LILO on IDE (AT-BUS) or SCSI hard
disks. The LILO version must be 22 or later, the kernel should be 2.0.4
or later. Owners of some disk adapters may have to create a DISK section
(see section "Disk geometry" in the accompanying documentation) to describe
the disk geometry.

WARNING: QuickInst may get confused if you're running it in a directory
	 that contains a mixture of old and new LILO distributions. To be
	 safe, always extract new LILO distributions in their own, new
	 directory.

------------- End of description. What follows is program code. -------------
@

CFG_SUFFIX=/etc
CFG_DIR=$ROOT$CFG_SUFFIX
CFG_FILE=$CFG_DIR/lilo.conf
BOOT_SUFFIX=/boot
BOOT_DIR=$ROOT$BOOT_SUFFIX
SBIN_DIR=$ROOT/sbin

locate()
{
    var=$1
    while shift && [ ! -z "$1" ]; do
	for p in `echo $PATH | sed 's/:/ /g'`; do
	    if [ -x $p/$1 ]; then
		eval $var=$p/$1
		return 0
	    fi
	done
    done
    return 1
}

probe()
{
    [ ! -z "`dd if=$1 bs=1 count=1 2>/dev/null | tr '\0' x`" ]
    return
}

bootflag()
{
    [ "XY" = "`(dd of=/dev/null bs=510 count=1; dd bs=2 count=1 |
      tr -c '\125\252' . | tr '\125\252' XY) <$1 2>/dev/null`" ]
    return
}

krnltype()
{
    if [ "YX" = "`(dd bs=2 count=1 | tr -c '\001\013' . | tr '\001\013' XY) \
      <$1 2>/dev/null`" ]; then
	echo compound
    else
	echo image
    fi
}

get()
{
    while true; do
	echo -n "$1 "
	if [ -z "$3" ]; then
	    echo -n "(no default) "
	else
	    echo -n "[$3] "
	fi
	read line
	line="`echo "$line" | sed 's/^ *\([^ ]\(\|.*[^ ]\)\) *$/\1/'`"
	if [ -z "$line" ]; then
	    if [ -z "$3" ]; then
		echo "No default, please specify a value."
		continue
	    fi
	    line=$3
	fi
	if [ "x$line" = "x!" ]; then
	    cat <<EOF

Starting a sub-shell. Type  exit  to return.

EOF
	    ${SHELL:-sh}
	    echo
	    continue
	fi
	if echo "$line" | grep '^!' >/dev/null; then
	    sh -c "`echo \"$line\" | sed 's/^!//'`"
	else
	    eval $2="$line"
	    break
	fi
    done
}

yesno()
{
    while true; do
	get "$1" line $2
	if echo "$line" | egrep -i '^y(|e(|s))$' >/dev/null; then
	    return 0
	fi
	if echo "$line" | egrep -i '^no?$' >/dev/null; then
	    return 1
	fi
	echo "YES or NO, please."
    done
}


askinitrd()
{
    idef=""
    for nn in /initrd /boot/initrd $ROOT/initrd $ROOT/boot/initrd; do
	if [ -f $ROOT/$nn ]; then
	    idef=$nn
	    break
	fi
    done

    if yesno "Does this kernel need an inital ramdisk?" no; then
	    get "Initial ramdisk" initrd "$idef"
	    if [ -f $initrd ]; then
		echo "  initrd = $initrd" >>$CFG_FILE.tmp
		return 0
	    else
		echo "$initrd  does not exist."
		echo "You must specify an absolute path"
		echo "#  initrd = $initrd    # file not found" >>$CFG_FILE.tmp
		return 1
	    fi
    fi
}



#####################################################
# start of the actual script
#####################################################

echo
if [ $ROOT/etc/lilo = `pwd` ]; then
    cat <<EOF
You can't run QuickInst in /etc/lilo ! Please cd to the directory that
contains your LILO source files and try again.

EOF
    exit 1
fi

if id | grep 'uid=0(' >/dev/null; then : ; else
    echo "You probably have to be root to install LILO."
    echo
    if yesno "Try to install LILO anyway ?" no; then : ; else
	echo
	exit 1
    fi
    echo
fi

badlib=""
if [ "`echo 'X(Y)' | sed 's/\(X\)(Y)/\1/'`" != "X" ]; then
    echo "Your sed doesn't behave like sed."
    badlib=y
fi
if [ "`echo 'X(Y)' | grep '^X(Y)'`" != "X(Y)" ]; then
    echo "Your grep doesn't behave like grep."
    badlib=y
fi
if [ "`echo 'X(Y)' | egrep '^(X)\(Y\)'`" != "X(Y)" ]; then
    echo "Your egrep doesn't behave like egrep."
    badlib=y
fi
if [ ! -z "$badlib" ]; then
    echo "Your libraries might be broken."
    echo
    exit 1
fi

cat <<EOF
QuickInst configures LILO and installs it on your hard disk. It should only be
used for first-time installations, _not_ to update or modify an existing
installation of LILO. It will _not_ generate a valid installation with versions
of LILO below 22.

The installation procedure can be interrupted by pressing ^C at any time. When
at a prompt, a sub-shell can be invoked with the exclamation mark.

EOF
if yesno "Continue ?" yes; then : ; else
    echo
    exit 0
fi
echo

replace=""
if [ -d $BOOT_DIR -a \( -f boot.b -o -f first.S \) ]; then
    cat <<EOF
A directory $BOOT_SUFFIX already exists. If you're installing a new version of
LILO now, QuickInst has to replace the old files with the new ones.

EOF
    if yesno "Replace old files ?" yes; then
	replace=y
    fi
    echo
fi

if [ -f $ROOT/etc/lilo/install -a ! -L $ROOT/etc/lilo/install -a \
  "$replace" != "y" ]; then
    cat <<EOF
/etc/lilo/install is a regular file and not a symbolic link. It should be
a symbolic link to /sbin/lilo (see INCOMPAT for details).

EOF
    if yesno "Replace install by a link ?" yes; then
	ln -sf $SBIN_DIR/lilo $ROOT/etc/lilo/install
    fi
    echo
fi

noinst=""
if [ -f $CFG_DIR/disktab ]; then
    if [ "#|" = "`sed 1q <$CFG_DIR/disktab`" ]; then
	cat <<EOF
$CFG_DIR/disktab is a Shoelace-style parameter table. It is
incompatible with LILO and most likely obsolete.

EOF
	if yesno "Remove $CFG_DIR/disktab ?" yes; then
	    rm -f $CFG_DIR/disktab
	else
	    if yesno "Proceed anyway ?" no; then
		cat <<EOF

Okay, but QuickInst won't automatically invoke LILO at the end of the
configuration session, because you have to get rid of disktab first.
EOF
		noinst=y
	    else
		echo Terminating
		exit 1
	    fi
	fi
	echo
    fi
fi

echo
if [ ! -f $BOOT_DIR/boot.b -o ! -z "$replace" ]; then
    if [ ! -f boot.b ]; then
	if [ ! -f first.S ]; then
	    cat <<EOF
LILO is not installed and I don't know how to make it. Please cd to the
directory where your LILO source lives and try again.

EOF
	    exit 1
	fi
	if [ ! -f /usr/include/linux/config.h ]; then
	    cat <<EOF
The kernel header files appear to be missing. Please install them, then try
QuickInst again.

EOF
	    exit 1
	fi
	if [ ! -f /usr/include/linux/autoconf.h ]; then
	    cat <<EOF
(Creating dummy /usr/include/linux/autoconf.h)

EOF
	    touch /usr/include/linux/autoconf.h
	fi
	cat <<EOF
Making LILO ...

EOF
	if make; then : ; else exit; fi
	echo
    fi
    cat <<EOF
Installing LILO ...

EOF
    if make install; then : ; else exit; fi
    echo
fi

if [ ! -x $SBIN_DIR/lilo ]; then
    cat <<EOF
$SBIN_DIR/lilo is missing. Don't know how to proceed ...

EOF
    exit 1
fi

version="`$SBIN_DIR/lilo -V 2>/dev/null | sed 's/LILO version \(0\.\)\?//' | sed 's/\..*//'`"
# echo LILO version $version is installed
if [ -z "$version" ]; then
    cat <<EOF
Incompatible version of LILO. Expecting 22 (or later), found 10 or older.

EOF
    exit 1
fi
if [ "$version" -lt 22 ]; then
    cat <<EOF
Incompatible version of LILO. Expecting 22 (or later), found $version

EOF
    exit 1
fi

#if [ ! -x ./activate ]; then
#    cat <<EOF
#activate  is not in the current directory. Please cd to your LILO source
#directory and run QuickInst again.
#EOF
#fi

if [ -d $ROOT/etc/lilo -a ! -x $ROOT/etc/lilo/install ]; then
    ln -s $SBIN_DIR/lilo $ROOT/etc/lilo/install
fi


if [ -f $CFG_FILE ]; then
    cat <<EOF

There is an existing configuration file:  "$CFG_FILE"

EOF
    if yesno "Do you wish to generate a new \"$CFG_FILE\"" no ; then :
    else
	echo
	echo "Running $SBIN_DIR/lilo" ...
	echo
	if $SBIN_DIR/lilo ; then
		echo 
	else
	    cat <<EOF

Errors were noted in the running of the newly installed LILO with the
old configuration file.  You will have to edit the file and re-run
$SBIN_DIR/lilo to install the new boot loader.

Exiting ...
EOF
	fi
	exit
    fi
fi

dev="`find /dev -maxdepth 1 -type b -name '[hs]da' | sed 's,/[hs]da$,,;1q'`"
if [ -z "$dev" ]; then
    cat <<EOF
(Can't locate hda or sda device in /dev or in a subdirectory or it.
 Assuming disk devices live in /dev)
EOF
    dev="/dev"
else
    echo "(Disk devices live in $dev)"
fi
echo

echo "Gathering configuration data ..."

second=/dev/sdb

if [ -L $dev/hda ]; then
    cat <<EOF

$dev/hda is a symbolic link. Assuming your first disk is $dev/sda

EOF
    first=$dev/sda
    if probe $dev/sdb; then
	second=$dev/sdb
    fi
else
    if probe $dev/hda; then
	first=$dev/hda
	if probe $dev/hdb; then
	    second=$dev/hdb
	else
	    if probe $dev/sda; then
		second=$dev/sda
	    fi
	fi
    else
	if probe $dev/sda; then
	    first=$dev/sda
	    if probe $dev/sdb; then
		second=$dev/sdb
	    fi
	else
	    cat <<EOF

Unable to determine what your first disk is. (Tried $dev/hda
and $dev/sda, but none of them appears to exist.)
Sorry, this is a fatal error.

EOF
	    exit 1
	fi
    fi
fi
root=""
if locate path rootdev rdev setroot; then
    root=`$path | awk '{ print $1 }'`
    echo
    echo "(/ is mounted on $root)"
fi
boot=""
if echo $root | grep "^${first}[1-4]*\$" >/dev/null; then
    boot=$root
fi

cat <<EOF