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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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pascal@341
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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@408
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16 # files count of / regarding the RAM size, default 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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pascal@341
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21 # mount= [MOUNT]
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22 # device with root loop file or sub directory
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pascal@341
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23 # posixovl [MOUNT]
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pascal@341
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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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pascal@341
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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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pascal@341
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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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pascal@341
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36 # softraid= [RAID]
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pascal@341
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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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pascal@341
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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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pascal@341
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41 # encrypted root device using luks or loop-aes
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pascal@341
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42 #
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pascal@418
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43 ### Special mode used by loram flavor with aufs/overlayfs & squashfs
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pascal@342
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44 ### incremental/nested rootfs (russian dolls).
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pascal@341
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45 #
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pascal@341
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46 # rodev= [LORAM][MERGE]
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pascal@341
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47 # device (+ optional path) for the read only aufs branch
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pascal@341
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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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pascal@341
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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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pascal@341
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52
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al@416
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53
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al@416
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54 fail() {
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al@416
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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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al@416
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58
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al@416
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59 quit() {
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al@416
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60 [ -d /mnt$4/etc ] || return
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al@416
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61 [ -n "$4" ] || busybox mount /mnt -o remount,ro
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al@416
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62 busybox mount --move /run /mnt/${1:-run}
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al@416
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63 cat > /run/init <<EOT
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pascal@314
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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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pascal@276
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71
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72
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73 arg() {
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74 grep -q $1 /proc/cmdline
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pascal@276
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75 }
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pascal@276
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76
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al@416
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77
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al@416
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78 got() {
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79 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
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pascal@276
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80 }
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pascal@276
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81
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al@416
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82
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al@416
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83 msg() {
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al@416
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84 echo "Switching / to $1..."
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pascal@276
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85 }
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pascal@276
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86
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al@416
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87
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al@416
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88 use() {
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al@416
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89 got $1 && msg "$1 $root"
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pascal@276
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90 }
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pascal@276
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91
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al@416
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92
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al@416
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93 mnt() {
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al@416
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94 r=$(busybox blkid 2> /dev/null | sed "s|\"||g;/${root//[^a-zA-Z0-9]/.}/!d;s|:.*||;q")
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al@416
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95 r=${r:-$root}
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al@416
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96 if [ ! -b $r ]; then
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al@416
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97 r=${r#/dev/}
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98 r=/dev/${r%%/*}
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99 fi
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al@416
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100 d=${root#*$r}
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101 busybox mount $r $1 && return
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al@416
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102 w=$(cat /sys/module/usb_storage/parameters/delay_use)
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103 w=$((1+${w:-2}))
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104 echo -n "Sleep $w seconds..."
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105 sleep $w
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al@416
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106 busybox mount $r $1
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pascal@314
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107 }
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pascal@314
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108
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al@416
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109
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110 mod() {
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111 for i in $@; do
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112 echo "Loading module: $i"
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113 modprobe $i 2>/dev/null || busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
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114 done
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pascal@314
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115 }
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pascal@314
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116
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al@416
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117
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al@416
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118 try() {
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al@416
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119 if [ ! -d /mnt/etc ] && got cryptoroot; then
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120 mod dm-mod dm-crypt aes-256
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al@416
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121 d=${root#/dev/}
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122 l=crypto-$d
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al@416
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123 if cryptsetup isLuks $root 2>/dev/null; then
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al@416
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124 cryptsetup luksOpen $root $l
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al@416
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125 else
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al@416
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126 read -st 60 -p "Pass phrase : " p
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127 k=$(echo $p|hashalot -x -n 32 sha512)
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al@416
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128 echo 0 $(cat $(find /sys/block|grep /$d/size))\
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129 crypt aes-plain $k 0 $root 0|dmsetup create $l
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al@416
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130 fi
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al@416
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131 busybox mount /dev/mapper/$l /mnt
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pascal@314
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132 fi
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al@416
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133 got subroot && return
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al@416
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134 got loopfs && return
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al@416
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135 if [ -d /mnt/etc ]; then
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al@416
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136 for i in $@; do
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137 cp -a $i /mnt$(dirname $i)
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138 done
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al@416
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139 quit
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al@416
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140 fi
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al@416
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141 fail
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pascal@314
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142 }
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pascal@314
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143
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al@416
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144
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al@416
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145 lvm() {
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al@416
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146 use lvmroot || return
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al@416
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147 mod dm-mod
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al@416
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148 vgscan --ignorelockingfailure
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al@416
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149 vgchange -ay --ignorelockingfailure
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150 busybox mount /dev/mapper/$root /mnt
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151 try /dev/mapper $1
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pascal@314
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152 }
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pascal@314
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153
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al@416
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154
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al@416
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155 ldraid() {
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al@416
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156 while read l; do
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al@416
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157 case "$l" in
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al@416
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158 *raid10*) mod raid10;;
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al@416
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159 *raid0*) mod raid0;;
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al@416
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160 *raid1*) mod raid1;;
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161 *raid*) mod raid456;;
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162 *mirror*) mod dm-mirror;;
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163 esac
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164 done
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pascal@276
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165 }
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pascal@276
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166
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al@416
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167
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al@416
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168
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al@416
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169
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al@416
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170 if [ "$1" != 'log' ]; then
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al@373
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171 busybox mount -t proc proc /proc
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al@373
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172 busybox mount -t sysfs sys /sys
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al@373
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173 busybox mount -t tmpfs tmpfs /run
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pascal@314
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174 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
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pascal@314
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175 $0 log 2>&1 | tee /run/boot.log
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pascal@410
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176 busybox umount /sys
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al@373
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177 busybox umount /proc
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pascal@310
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178 . /run/init
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179 sh
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180 fi
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al@416
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181
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pascal@410
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182 for i in /sys/block/*/dev /sys/block/*/*/dev ; do
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pascal@411
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183 [ -s "$i" ] || continue
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pascal@410
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184 n=${i%/dev}
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pascal@410
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185 n=/dev/${n##*/}
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pascal@410
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186 [ -e $n ] && continue
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pascal@410
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187 echo "Create $n "
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pascal@410
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188 mknod $n b $(sed 's/:/ /' < $i)
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pascal@410
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189 done
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al@416
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190
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pascal@341
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191 got modprobe && mod ${root//,/ }
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al@416
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192
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pascal@384
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193 [ -d /proc/sys/dev/cdrom ] &&
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al@393
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194 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
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al@416
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195
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al@393
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196 if use dmraid; then
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al@393
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197 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
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pascal@314
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198 [ ${root:0:4} = /dev ] ||
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al@393
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199 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
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200 dmraid -ay
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201 fi
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pascal@399
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202 use raiddev && raiddev="DEVICE ${root//,/ }"
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pascal@399
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203 use raidmail && raidmail="MAILADDR $root"
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al@393
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204 if use softraid; then
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pascal@418
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205 for i in 1 2 3 4 5 6 7 8 9; do
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pascal@418
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206 mdadm -E -s -c partitions > /etc/mdadm.conf
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207 grep -qs " $root " /etc/mdadm.conf && break
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208 sleep $i
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209 done
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pascal@399
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210 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
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pascal@399
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211 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
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al@393
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212 grep level=raid /etc/mdadm.conf | ldraid
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al@393
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213 for i in 1 2 3 4 5 6 7 8 9; do
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al@393
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214 sleep $i
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pascal@314
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215 mdadm -A -s
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pascal@419
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216 grep -qs "^$(basename $root) : act" /proc/mdstat && break
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217 done
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pascal@419
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218 grep -qs "^$(basename $root) : act" /proc/mdstat ||
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pascal@418
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219 root=$(awk '/^md/ { print "/dev/" $1; exit }' < /proc/mdstat)
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pascal@323
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220 lvm /etc/mdadm.conf
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pascal@314
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221 fi
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pascal@323
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222 lvm
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al@416
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223
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al@393
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224 if got mount; then
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al@393
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225 dev=$root
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pascal@409
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226 x=$(busybox blkid|grep $dev|sed 's/:.*//;q')
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pascal@315
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227 root=${x:-$dev}
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pascal@314
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228 [ "$dev" = "$root" ] || dev="$root ($dev)"
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pascal@314
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229 echo "Mount $dev..."
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pascal@314
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230 mnt /mnt
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pascal@353
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231 arg posixovl && echo "And posixovl..." &&
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pascal@354
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232 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
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pascal@314
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233 fi
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al@416
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234
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pascal@314
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235 got loopfs && echo "Into file $root..." &&
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al@373
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236 losetup /dev/loop0 /mnt/$root && busybox mount /dev/loop0 /mnt
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pascal@317
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237 got bindfs && echo "Bind ${root/,/ to }..." &&
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al@373
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238 busybox mount --bind /mnt/${root%,*} /mnt/${root/,//}
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pascal@323
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239 arg cryptoroot= && try
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al@393
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240 if use subroot; then
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al@393
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241 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
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pascal@314
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242 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
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pascal@314
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243 r=$root/run
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pascal@314
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244 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
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pascal@323
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245 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
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pascal@314
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246 fi
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pascal@321
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247 quit
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pascal@314
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248 msg tmpfs
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pascal@314
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249 root=100
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pascal@314
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250 got tmpram
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pascal@314
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251 r=$root
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pascal@407
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252 inodes=0
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pascal@405
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253 got rootfsinodes && inodes=$root
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pascal@314
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254 root=90%
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pascal@314
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255 got rootfssize
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pascal@314
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256 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
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pascal@405
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257 busybox mount -t tmpfs -o size=$root,nr_inodes=$inodes tmpfs /mnt &&
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al@416
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258 for i in $(ls -ar /); do
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al@416
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259 case "$i" in
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al@416
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260 .*|cdrom) ;;
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al@416
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261 mnt|proc|sys) mkdir /mnt/$i;;
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al@416
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262 usr|var|rootfs*) mv /$i /mnt;;
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al@416
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263 *) cp -a /$i /mnt 2>/dev/null && continue
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al@416
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264 fail
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al@416
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265 busybox umount /mnt
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al@416
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266 exit
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al@416
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267 esac
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al@416
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268 done || fail 3mSkipped
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pascal@314
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269 quit
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pascal@323
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270 mod squashfs 2>/dev/null || exit
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pascal@314
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271 msg aufs
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pascal@314
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272 br=/mnt/.rw
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pascal@402
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273 mkdir $br /mnt/.wd
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pascal@314
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274 got rwdev && mnt $br && br=$br$d
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pascal@314
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275 o=
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pascal@314
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276 p=
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pascal@314
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277 c=/mnt/.cdrom
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al@393
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278 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
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al@393
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279 root=/dev/cdrom/fs
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pascal@314
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280 got rodev
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pascal@314
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281 mkdir -p $c /mnt$c /mnt/.rw$c
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pascal@314
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282 mnt $c
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pascal@314
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283 o="-o 124"
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pascal@314
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284 p=/.cdrom/boot
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pascal@318
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285 c=$c$d
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pascal@276
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286 fi
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pascal@314
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287 l=0
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pascal@314
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288 r=
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pascal@402
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289 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
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al@393
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290 fs=${i#*root}
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pascal@314
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291 r=$r:/mnt/.$fs
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pascal@314
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292 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
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pascal@314
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293 losetup $o /dev/loop$l $i
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al@373
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294 busybox mount -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
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pascal@276
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295 done
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pascal@402
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296 while read type opt; do
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pascal@402
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297 mod $type && busybox mount -t $type -o $opt none /mnt && break
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pascal@402
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298 done <<EOT
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pascal@402
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299 aufs br=$br$r
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pascal@402
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300 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
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pascal@402
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301 EOT
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pascal@314
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302 quit
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