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pascal@276
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1 #!/bin/sh
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pascal@276
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2
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paul@351
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3 ### cached kernel parameters :
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pascal@341
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4 #
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pascal@341
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5 # modprobe=
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pascal@341
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6 # list of modules to load, example modprobe=r8169,btrfs
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pascal@341
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7 #
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pascal@342
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8 ### Frugal mode or live CD : using a root ram disk.
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pascal@341
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9 #
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pascal@341
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10 # tmpram= [RAMDISK]
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11 # minimum % of free RAM to build the root tmpfs, default 100
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12 # a lower value may work, such as 50
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13 # rootfssize= [RAMDISK]
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14 # size of / regarding the RAM size, default 90%
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pascal@407
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15 # rootfsinodes= [RAMDISK]
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pascal@407
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16 # files count of / regarding the RAM size, 0 (unlimited)
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pascal@341
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17 #
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pascal@342
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18 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
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pascal@342
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19 ### Any rootfs should fit, minimum required is slitaz-base.
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pascal@341
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20 #
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21 # mount= [MOUNT]
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22 # device with root loop file or sub directory
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23 # posixovl [MOUNT]
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24 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
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25 # loopfs= [MOUNT]
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26 # loop file for root filesystem
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27 # subroot= [MOUNT]
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28 # sub directory for root filesystem
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paul@351
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29 # bindfs= [MOUNT] (deprecated)
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pascal@341
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30 # bind out of root tree part
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pascal@341
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31 #
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pascal@342
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32 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
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33 #
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34 # dmraid= [RAID]
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35 # root semi hardware raid device name in /dev/mapper
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36 # softraid= [RAID]
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37 # root software device name in /dev/mapper
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pascal@341
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38 # lvmroot= [LVM]
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39 # root logical volume name in /dev/mapper
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pascal@341
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40 # cryptoroot= [CRYPTO]
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41 # encrypted root device using luks or loop-aes
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42 #
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43 ### Special mode used by loram flavor with aufs & squashfs
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44 ### incremental/nested rootfs (russian dolls).
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45 #
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46 # rodev= [LORAM][MERGE]
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47 # device (+ optional path) for the read only aufs branch
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48 # rwdev= [LORAM][MERGE]
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paul@351
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49 # (persistent) device for the r/w aufs branch instead of the ramfs
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50 # isofs [LORAM]
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pascal@341
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51 # do not use squashfs filesystem images, but the cdrom filesystem only
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52
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53 fail()
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pascal@278
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54 {
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55 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
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pascal@278
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56 }
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pascal@278
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57
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pascal@314
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58 quit()
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pascal@276
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59 {
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60 [ -d /mnt$4/etc ] || return
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al@373
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61 [ -n "$4" ] || busybox mount /mnt -o remount,ro
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al@373
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62 busybox mount --move /run /mnt/${1:-run}
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pascal@314
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63 cat>/run/init<<EOT
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64 $2
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65 x=/sbin/switch_root
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66 [ -x \$x ] && exec \$x mnt $3 /sbin/init
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67 EOT
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68 fail 2mDone
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69 exit
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70 }
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71
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72 arg()
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73 {
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74 grep -q $1 /proc/cmdline
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75 }
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pascal@276
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76
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pascal@314
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77 got()
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pascal@276
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78 {
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79 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
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80 }
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pascal@276
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81
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82 msg()
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pascal@276
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83 {
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pascal@317
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84 echo "Switching / to $1..."
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85 }
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86
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87 use()
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pascal@276
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88 {
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pascal@315
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89 got $1 && msg "$1 $root"
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90 }
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91
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92 mnt()
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93 {
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pascal@406
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94 r=$(blkid 2> /dev/null | sed "s|\"||g;/$(echo $root | tr / .)/!d;s|:.*||;q")
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pascal@382
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95 r=${r:-$root}
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pascal@343
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96 r=${r#/dev/}
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97 r=/dev/${r%%/*}
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98 d=${root#*$r}
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al@373
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99 busybox mount $r $1 && return
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100 w=$(cat /sys/module/usb_storage/parameters/delay_use)
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101 w=$((1+${w:-2}))
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102 echo -n "Sleep $w seconds..."
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103 sleep $w
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al@373
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104 busybox mount $r $1
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105 }
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106
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107 mod()
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108 {
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al@373
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109 for i in $@; do
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al@373
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110 echo "Loading module: $i"
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al@393
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111 modprobe $i 2>/dev/null || busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
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pascal@341
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112 done
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pascal@314
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113 }
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114
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115 try()
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pascal@314
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116 {
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al@373
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117 if [ ! -d /mnt/etc ] && got cryptoroot; then
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al@373
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118 mod dm-mod dm-crypt aes-256
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pascal@314
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119 d=${root#/dev/}
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120 l=crypto-$d
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121 if cryptsetup isLuks $root 2>/dev/null; then
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122 cryptsetup luksOpen $root $l
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123 else
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124 read -st 60 -p "Pass phrase : " p
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125 k=$(echo $p|hashalot -x -n 32 sha512)
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126 echo 0 $(cat $(find /sys/block|grep /$d/size))\
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127 crypt aes-plain $k 0 $root 0|dmsetup create $l
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128 fi
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pascal@375
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129 busybox mount /dev/mapper/$l /mnt
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130 fi
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pascal@314
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131 got subroot && return
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132 got loopfs && return
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al@373
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133 if [ -d /mnt/etc ]; then
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al@373
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134 for i in $@; do
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al@373
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135 cp -a $i /mnt$(dirname $i)
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136 done
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137 quit
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pascal@314
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138 fi
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139 fail
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140 }
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141
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142 lvm()
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143 {
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144 use lvmroot || return
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145 mod dm-mod
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146 vgscan --ignorelockingfailure
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147 vgchange -ay --ignorelockingfailure
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al@373
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148 busybox mount /dev/mapper/$root /mnt
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pascal@323
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149 try /dev/mapper $1
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150 }
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pascal@314
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151
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152 ldraid()
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153 {
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al@393
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154 while read l; do
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al@393
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155 case "$l" in
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al@393
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156 *raid10*) mod raid10;;
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al@393
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157 *raid0*) mod raid0;;
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al@393
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158 *raid1*) mod raid1;;
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al@393
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159 *raid*) mod raid456;;
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160 *mirror*) mod dm-mirror;;
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161 esac
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162 done
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pascal@276
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163 }
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pascal@276
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164
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al@373
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165 if [ "$1" != "log" ]; then
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al@373
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166 busybox mount -t proc proc /proc
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al@373
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167 busybox mount -t sysfs sys /sys
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al@373
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168 busybox mount -t tmpfs tmpfs /run
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pascal@314
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169 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
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170 $0 log 2>&1 | tee /run/boot.log
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al@373
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171 busybox umount /proc
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al@373
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172 busybox umount /sys
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pascal@310
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173 . /run/init
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174 sh
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175 fi
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pascal@341
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176 got modprobe && mod ${root//,/ }
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pascal@384
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177 [ -d /proc/sys/dev/cdrom ] &&
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al@393
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178 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
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al@393
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179 if use dmraid; then
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al@393
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180 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
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181 [ ${root:0:4} = /dev ] ||
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al@393
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182 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
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183 dmraid -ay
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184 fi
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pascal@399
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185 use raiddev && raiddev="DEVICE ${root//,/ }"
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pascal@399
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186 use raidmail && raidmail="MAILADDR $root"
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al@393
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187 if use softraid; then
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al@393
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188 mdadm -E -s -c partitions > /etc/mdadm.conf
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pascal@399
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189 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
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pascal@399
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190 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
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pascal@314
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191 grep -qs " $root " /etc/mdadm.conf ||
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al@393
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192 root=$(awk '/dev.md/{print $2;exit}' < /etc/mdadm.conf)
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al@393
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193 grep level=raid /etc/mdadm.conf | ldraid
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al@393
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194 for i in 1 2 3 4 5 6 7 8 9; do
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al@393
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195 sleep $i
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pascal@314
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196 mdadm -A -s
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197 grep -qs ': act' /proc/mdstat && break
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198 done
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pascal@323
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199 lvm /etc/mdadm.conf
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200 fi
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pascal@323
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201 lvm
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al@393
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202 if got mount; then
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al@393
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203 dev=$root
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pascal@315
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204 x=$(blkid|grep $dev|sed 's/:.*//;q')
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pascal@315
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205 root=${x:-$dev}
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pascal@314
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206 [ "$dev" = "$root" ] || dev="$root ($dev)"
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pascal@314
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207 echo "Mount $dev..."
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pascal@314
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208 mnt /mnt
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pascal@353
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209 arg posixovl && echo "And posixovl..." &&
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pascal@354
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210 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
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pascal@314
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211 fi
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pascal@314
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212 got loopfs && echo "Into file $root..." &&
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al@373
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213 losetup /dev/loop0 /mnt/$root && busybox mount /dev/loop0 /mnt
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pascal@317
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214 got bindfs && echo "Bind ${root/,/ to }..." &&
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al@373
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215 busybox mount --bind /mnt/${root%,*} /mnt/${root/,//}
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pascal@323
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216 arg cryptoroot= && try
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al@393
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217 if use subroot; then
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al@393
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218 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
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pascal@314
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219 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
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pascal@314
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220 r=$root/run
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pascal@314
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221 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
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pascal@323
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222 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
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pascal@314
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223 fi
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pascal@321
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224 quit
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pascal@314
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225 msg tmpfs
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pascal@314
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226 root=100
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pascal@314
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227 got tmpram
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pascal@314
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228 r=$root
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pascal@407
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229 inodes=0
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pascal@405
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230 got rootfsinodes && inodes=$root
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pascal@314
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231 root=90%
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pascal@314
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232 got rootfssize
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pascal@314
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233 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
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pascal@405
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234 busybox mount -t tmpfs -o size=$root,nr_inodes=$inodes tmpfs /mnt &&
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al@393
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235 for i in $(ls -ar /); do
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al@393
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236 case "$i" in
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pascal@317
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237 .*|cdrom) ;;
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pascal@314
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238 mnt|proc|sys) mkdir /mnt/$i;;
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pascal@314
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239 usr|var|rootfs*) mv /$i /mnt;;
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pascal@314
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240 *) cp -a /$i /mnt 2>/dev/null && continue
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pascal@314
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241 fail
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al@373
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242 busybox umount /mnt
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pascal@314
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243 exit
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pascal@276
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244 esac
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pascal@314
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245 done || fail 3mSkipped
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pascal@314
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246 quit
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pascal@323
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247 mod squashfs 2>/dev/null || exit
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pascal@314
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248 msg aufs
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pascal@314
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249 br=/mnt/.rw
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pascal@402
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250 mkdir $br /mnt/.wd
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pascal@314
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251 got rwdev && mnt $br && br=$br$d
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pascal@314
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252 o=
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pascal@314
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253 p=
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pascal@314
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254 c=/mnt/.cdrom
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al@393
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255 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
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al@393
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256 root=/dev/cdrom/fs
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pascal@314
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257 got rodev
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pascal@314
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258 mkdir -p $c /mnt$c /mnt/.rw$c
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pascal@314
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259 mnt $c
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pascal@314
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260 o="-o 124"
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pascal@314
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261 p=/.cdrom/boot
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pascal@318
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262 c=$c$d
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pascal@276
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263 fi
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pascal@314
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264 l=0
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pascal@314
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265 r=
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pascal@402
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266 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
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al@393
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267 fs=${i#*root}
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pascal@314
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268 r=$r:/mnt/.$fs
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pascal@314
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269 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
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pascal@314
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270 losetup $o /dev/loop$l $i
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al@373
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271 busybox mount -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
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pascal@276
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272 done
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pascal@402
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273 while read type opt; do
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pascal@402
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274 mod $type && busybox mount -t $type -o $opt none /mnt && break
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pascal@402
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275 done <<EOT
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pascal@402
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276 aufs br=$br$r
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pascal@402
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277 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
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pascal@402
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278 EOT
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pascal@314
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279 quit
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