source: branches/2.2.8/mondo/src/restore-scripts/mondo/grub-MR @ 2137

Last change on this file since 2137 was 2137, checked in by Bruno Cornec, 11 years ago

Adds support for multipath type ofdrivers to grub-MR

  • Property svn:keywords set to Id
  • Property svn:unix-mode set to 755
File size: 4.0 KB
Line 
1#!/bin/sh
2#
3# $Id: grub-MR 2137 2009-02-02 16:07:34Z bruno $
4#
5# grub-MR ------ a rudimentary replacement for grub-install
6#
7#
8
9Die() {
10    echo "$1" >> /dev/stderr
11    exit 1
12}
13
14
15FindBootPart() {
16    local i
17    bootpart=""
18    BOOTPATHNAME=""
19    for sz in /boot / ; do
20        bootpart=`grep " $sz " $2 | cut -d' ' -f1 | head -n1`
21        [ "$bootpart" ] && [ -e "/mnt/RESTORING/$bootpart" ] && break
22    done
23    [ ! "$bootpart" ] && Die "Cannot find boot partition in mountlist"
24
25    if [ "$sz" = "/boot" ] ; then
26        BOOTPATHNAME=/grub
27    else
28        BOOTPATHNAME=/boot/grub
29    fi
30    if [ -e "$MNT_RESTORING/boot/grub/stage1" ] ; then
31        echo "Alright then."
32        return
33    fi
34   
35    cd $MNT_RESTORING
36    for i in usr/lib/grub/* ; do
37        echo "Checking $i"
38        if [ -e "$i/stage1" ] ; then
39            BOOTPATHNAME=/$i
40            mkdir -p /boot/grub
41            cp -au $i/* /boot/grub/
42            echo "BOOTPATHNAME is now $BOOTPATHNAME"
43            return 0
44        fi
45    done
46    cd /
47    echo "Cannot find BOOTPATHNAME"
48    return 1
49}
50
51FindPathOfRESTExe() {
52    local path
53    for path in /usr/sbin /usr/bin /usr/local/sbin /usr/local/bin \
54/bin /sbin ; do
55        if [ -f "/mnt/RESTORING/$path/$1" ] ; then 
56            echo "/mnt/RESTORING/$path/$1"
57        return
58        fi
59    done
60    which grub
61}
62
63
64try_grub_hack() {
65    local driveno extraline partno
66    driveno=$1
67    partno=$2
68    extraline="$3"
69
70    echo -en "\
71    device (hd$driveno) $mbrpart\n\
72    $extraline\n\
73    root (hd$driveno,$partno)\n\
74    setup (hd$driveno)\n\
75    quit \n" > /tmp/feed.txt
76    cat /tmp/feed.txt
77    log_file=/tmp/grub.output
78    if [ "$MNT_RESTORING" ] ; then
79        chroot /mnt/RESTORING grub --batch < /tmp/feed.txt > $log_file
80    else
81        grub --batch < /tmp/feed.txt > $log_file
82    fi
83    cat $log_file
84    if grep "Error [0-9]*: " $log_file >/dev/null; then
85            return 1
86    else
87            return 0
88    fi
89}
90
91
92# ---------------------------------- main -----------------------------------
93
94if [ "$#" -ne "2" ] ; then
95    Die "grub-MR <MBR drive> <mountlist filename>; e.g. grub-MR /dev/hda /tmp/mountlist.txt"
96fi
97[ ! -f "$2" ] && Die "mountlist file not found"
98
99if [ -e "/mnt/RESTORING/boot" ] ; then
100    MNT_RESTORING=/mnt/RESTORING
101else
102    MNT_RESTORING=""
103fi
104
105echo "Now I'll use grub-install" >> $LOGFILE
106chroot /mnt/RESTORING grub-install $1 >> $LOGFILE
107res=$?
108echo "grub-install returned $res" >> $LOGFILE
109[ "$res" -eq "0" ] && exit 0
110
111echo "Trying a hack" >> $LOGFILE
112FindBootPart $1 $2
113mbrpart=$1
114if echo $bootpart | grep "/cciss/" > /dev/null ; then
115    partno=`basename $bootpart | cut -d'p' -f2`
116elif echo $bootpart | grep "/mapper/mpath" > /dev/null ; then
117    partno=`basename $bootpart | cut -d'p' -f2`
118else
119    partno=`basename $bootpart | sed s/[a-z]*//`
120fi
121if [ ! "$partno" ] ; then
122    partno=0
123else
124    partno=$(($partno-1))
125fi
126if echo $bootpart | grep "/md" > /dev/null ; then
127    base=`basename $bootpart`
128    line=`grep $base /proc/mdstat | head -n1`
129    echo "mbrpart was $mbrpart"
130    mbrpart=`parted2fdisk -l | grep /dev/ | head -n1 | tr ':' ' ' \
131| cut -d' ' -f2`
132    echo "mbrpart is $mbrpart"
133    partno="0"; # cheating - FIXME   
134fi
135echo ".............Cool."
136
137grub=`FindPathOfRESTExe grub`
138mkdir -p /boot
139[ "$MNT_RESTORING" ] && ln -sf /mnt/RESTORING/boot/grub /boot/grub
140
141# ---------------------------------
142
143for driveno in 0 1 2 ; do
144    try_grub_hack $driveno $partno "" >> $LOGFILE 2>> $LOGFILE && break
145    try_grub_Hack $driveno $partno "find $BOOTPATHNAME/stage1" >> $LOGFILE 2>> $LOGFILE && break
146done
147res=$?
148echo "Hack returned res=$res" >> $LOGFILE
149[ "$res" -eq "0" ] && exit 0
150
151# ---------------------------------
152
153echo "Now I'll use grub-install.patched" >> $LOGFILE
154cp -f `which grub-install.patched` /mnt/RESTORING/sbin
155chroot /mnt/RESTORING grub-install.patched $1 >> $LOGFILE
156res=$?
157echo "grub-install.patched returned $res" >> $LOGFILE
158[ "$res" -eq "0" ] && exit 0
159
160# ---------------------------------
161
162echo "Trying to use the existing menu.lst file in batch mode" >> $LOGFILE
163chroot /mnt/RESTORING grub --batch < /mnt/RESTORING/boot/grub/menu.lst
164res=$?
165echo "menu.lst approach returned $res" >> $LOGFILE
166[ "$res" -eq "0" ] && exit 0
167
168echo "grub-MR returned res=$res" >> $LOGFILE
169
170exit $res
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