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1 #!/bin/ash
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2 # Initial script for Linux Live operating system
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3 # Author: Tomas M <http://www.linux-live.org/>
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4
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5 export PATH=.:/:/usr/sbin:/usr/bin:/sbin:/bin
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6
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7 mount -n -t proc proc /proc
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8 mount -n -t sysfs sysfs /sys
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9 #mount -n -o remount,rw / # for the case we forgot rw boot option
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10 ln -sf /proc/mounts /etc/mtab # this allows us to use umount -a
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11
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12 . /liblinuxlive # it requires proc to be mounted
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13
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14 # Don't print kernel messages to konsole now.
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15 # Syslog will reset printk settings, no need to remember it here anymore.
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16 echo "0" >/proc/sys/kernel/printk
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17
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18 # Load essential drivers, like CDROM drivers, aufs/squashfs etc,
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19 # use mdev to create /dev/ devices and setup it as a hotplug-handler
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20 modprobe_essential_modules
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21
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22 # /usr and some drivers are compressed in initrd
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23 # so it must be mounted from .lzm files
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24 #mount_initrd_loops
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25
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26 # start hotplugging before hw drivers load
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27 #mdev_start_hotplug
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28
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29 # Then load drivers for data storage and input devices
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30 modprobe_usb_modules
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31 modprobe_pcmcia_modules
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32
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33 debug_shell
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34
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35 # make sure ext3 partitions are not mounted using ext2 driver,
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36 # and vfat partitions are not mounted using msdos driver
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37 echo -e "ext4\next3\next2\nvfat\n*" >/etc/filesystems
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38
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39 mkdir -p $UNION
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40 mkdir -p $MEMORY
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41
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42 debug_shell
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43
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44 # Find livecd data directory by searching for livecd.sgn file
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45 SGN=$(cmdline_value sgnfile)
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46 if [ "$SGN" = "" ]; then SGN=livecd.sgn; fi
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47 echolog "looking for '$LIVECDNAME' data directory (searching for $SGN file)"
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48
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49 # First, try from= boot argument, if given
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50 DATAFROM=$(cmdline_value from)
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51
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52 # Boot directly from iso
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53 FINDISOVAR=$(cmdline_value findiso)
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54
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55 # If ip= parameter is present, assume we're booted over PXE
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56 # In that case, we have to initialize network very soon (now)
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57 # ip=<client-ip>:<boot-server-ip>:<gw-ip>:<netmask>
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58 # Nevertheless, from= parameter won't be overwritten by this
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59 IP=$(cmdline_value ip)
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60 if [ "$IP" != "" -a "$DATAFROM" = "" ]; then
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61 DATAFROM="http://"$(echo $IP | cut -d : -f 2)
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62 fi
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63
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64 if [ "$FINDISOVAR" != "" -a "$DATAFROM" = "" ]; then
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65 FINDISO=$(find_in_computer $FINDISOVAR)
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66 DATAFROM="$FINDISO"
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67 echolog "$FINDISO found."
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68 fi
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69
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70 if [ "$DATAFROM" ]; then
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71 if [ "$(echo $DATAFROM | cut -b 1-7 | tr "[:upper:]" "[:lower:]")" = "http://" ]; then
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72 init_dhcp $(modprobe_network_modules)
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73 mount_httpfs $DATAFROM $MOUNTDIR/httpfs
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74 # if mountdir/httpfs/livecdname is found, set DATA=, else umount httpfs
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75 # - currently this part works even without the above mentioned, but livecd.sgn is required now untill it's uncommented
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76 elif [ "$FINDISO" ]; then
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77 mount_device $DATAFROM $FINDISOMNT
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78 echolog "$FINDISO mounted."
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79 else
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80 DATAFROM=$(find_in_computer $DATAFROM)
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81 if [ "$DATAFROM" ]; then
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82 mount_device $DATAFROM $LOOPMOUNT # mount again, it may be loop device
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83 if [ $? -eq 0 -a "$(find_modules $LOOPMOUNT/$LIVECDNAME)" != "" ]; then
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84 echolog "found in $DATAFROM"
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85 DATA=$LOOPMOUNT/$LIVECDNAME
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86 else
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87 fumount $LOOPMOUNT
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88 fumount $MOUNTDIR/*
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89 fi
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90 fi
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91 fi
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92 fi
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93
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94 if [ "$DATA" = "" ]; then
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95 # from= is not used or it didn't contain valid data
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96 DATA=$(find_in_computer $LIVECDNAME/$SGN)
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97 DATA=$(dirname $DATA 2>/dev/null)
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98 fi
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99
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100 if [ "$DATA" = "" ]; then fatal \
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101 "$LIVECDNAME data not found.
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102 You are maybe using an unsupported boot device (eg. SCSI or old PCMCIA).
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103 Workaround: Copy the directory $LIVECDNAME from your boot device to an IDE/SATA
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104 disk, eg. to /mnt/hda1/$LIVECDNAME or C:\\$LIVECDNAME. Then try to boot again."
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105 fi
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106
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107 echolog "Using $LIVECDNAME data from $DATA"
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108
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109 debug_shell
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110
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111 echolog "Setting up directory for changes ..."
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112 CHANGESVAL=$(cmdline_value changes)
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113
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114 if [ "$CHANGESVAL" ]; then
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115 CHANGESMNT=$(find_in_computer $CHANGESVAL)
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116 echolog $CHANGESMNT
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117 fi
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118
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119 debug_shell
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120
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121 mount_device "$CHANGESMNT" $MEMORY # removes $MEMORY if CHANGESMNT is wrong
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122
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123 # test if the filesystem is writable so changes can be stored to it
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124 touch $MEMORY/empty 2>/dev/null && \
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125 rm -f $MEMORY/empty 2>/dev/null
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126
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127 # if changes can't be mounted or the filesystem is not writable,
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128 # fallback to the default: tmpfs
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129 if [ $? -ne 0 ]; then
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130 echolog "Changes not used or not writable, using memory only"
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131 fumount $MEMORY
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132 mkdir -p $MEMORY # mount_device might removed it
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133
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134 RAMSIZE=$(cmdline_value ramsize)
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135 if [ "$RAMSIZE" = "" ]; then RAMSIZE="60%"; fi
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136 mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY
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137 XINO=$MEMORY
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138 else
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139 # So it is writable, we will keep the filesystem mounted.
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140 # Check if it supports links and chmod.
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141 # If not, overmount CHANGES using posixovl
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142 echolog "Testing the filesystem for posix compatibility ..."
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143 touch $MEMORY/.empty1 && \
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144 ln -sf $MEMORY/.empty1 $MEMORY/.empty2 2>/dev/null && \
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145 chmod +x $MEMORY/.empty1 2>/dev/null && \
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146 test -x $MEMORY/.empty1 && \
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147 chmod -x $MEMORY/.empty1 2>/dev/null && \
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148 test ! -x $MEMORY/.empty1 && \
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149 rm $MEMORY/.empty1 $MEMORY/.empty2 2>/dev/null
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150
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151 if [ $? -ne 0 ]; then
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152 echolog "Not compatible - starting posixovl"
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153 rm $MEMORY/.empty1 $MEMORY/.empty2 2>/dev/null
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154 mkdir -p $CHANGES
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155 posixovl -F $CHANGES -- -o attr_timeout=300,entry_timeout=300,negative_timeout=300,kernel_cache,allow_other
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156 find $CHANGES >/dev/null 2>&1 # cache everything now
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157 fi
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158 fi
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159
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160 # $UNION will be used as a root directory, livecd modules will be added soon
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161 echolog "Setup union directory (using aufs)"
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162
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163 mkdir -p $CHANGES
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164 mkdir -p $IMAGES
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165 mount -n -t tmpfs tmpfs $IMAGES
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166
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167 debug_shell
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168
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169 # store the xino file in memory in all cases, it's faster and safer
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170 if [ "$XINO" != "$MEMORY" ]; then
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171 mkdir -p $XINO
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172 mount -n -t tmpfs tmpfs $XINO
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173 fi
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174
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175 # mount aufs using the writable branch as the first one (leftmost/topmost)
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176 mount -t aufs -o nowarn_perm,xino=$XINO/.aufs.xino,br:$CHANGES=rw aufs $UNION
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177 if [ $? -ne 0 ]; then dmesg | tail -n 1; fatal "can't setup union (aufs)"; fi
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178
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179 debug_shell
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180
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181 # setup initramfs if it exist
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182 if [ -d /initramfs ]; then
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183 echolog "Setup initramfs for first module..."
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184 mount -n -o remount,add:1:/initramfs=ro aufs $UNION
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185 fi
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186
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187 debug_shell
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188
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189 # If toram or copy2ram boot parameter is present, copy all fs modules to RAM.
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190 # (skip modules from /optional/ which are not listed in load= boot option)
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191 # Finaly modify DATA variable so it will point to correct directory
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192 if [ "$(cmdline_parameter toram)" != "" -o "$(cmdline_parameter copy2ram)" != "" ]; then
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193 echolog "copying $LIVECDNAME data to RAM, this may take some time..."
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194 mkdir -p $COPY2RAM
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195
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196 # make sure it's in RAM even with changes= parameter
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197 if [ "$CHANGESMNT" ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $COPY2RAM; fi
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198 copy_to_ram $DATA $COPY2RAM
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199
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200 cd_autoeject 1
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201 fumount $DATA
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202 fumount $MOUNTDIR/*
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203 rmdir $MOUNTDIR/* 2>/dev/null # mounted device names are empty, remove them
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204 DATA=$COPY2RAM
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205 cd_autoeject 0
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206 fi
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207
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208 debug_shell
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209
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210 MODPATH=$(cmdline_value modpath)
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211 if [ "$MODPATH" != "" ]; then
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212 MODPATH=$(find_in_computer $MODPATH)
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213 if [ $FINDISOVAR ]; then
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214 mount_device $MODPATH $FINDISOMNT/$LIVECDNAME/tmp rbind
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215 else
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216 mount_device $MODPATH $DATA/tmp rbind
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217 fi
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218 fi
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219
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220 debug_shell
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221
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222 #if [ $(cmdline_parameter copy) ]; then
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223 # echolog "Copying initramfs to union. Please wait..."
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224 # # copy busybox to union
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225 # for i in $(ls -a /); do
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226 # case "$i" in
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227 # .|..) ;;
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228 # memory|union) ;;
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229 # mnt) mkdir -p $UNION/mnt ;;
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230 # sys) mkdir -p $UNION/sys ;;
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231 # proc) mkdir -p $UNION/proc ;;
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232 # dev) ;;
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233 # *) if ! cp -af /$i $UNION 2> /dev/null; then
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234 # debug_shell
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235 # fi ;;
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236 # esac
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237 # done
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238 #fi
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239
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240 #debug_shell
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241
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242 # DATA contains path to the base directory of all fs modules which need
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243 # to be mounted and inserted into live filesystem. Do it now.
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244 echolog "Loading modules:"
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245 union_insert_modules $UNION $DATA $IMAGES
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246
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247 # the $MEMORY directory can contain $MEMORY/modules too
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248 # in the case if changes= boot argument is used. If not, it doesn't hurt
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249 union_insert_modules $UNION $MEMORY $IMAGES
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250
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251 debug_shell
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252
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253 ROOTCOPY=$(cmdline_value rootcopy)
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254 if [ $(cmdline_parameter norootcopy) ]; then
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255 echolog "Not using rootcopy"
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256 elif [ "$ROOTCOPY" ]; then
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257 echolog "Mounting content of rootcopy directory"
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258 ROOTCOPY=$(find_in_computer $ROOTCOPY)
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259 mount_device $ROOTCOPY $DATA/rootcopy rbind
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260 echolog "Copying content of rootcopy directory"
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261 cp -af $DATA/rootcopy/* $UNION 2>/dev/null # may be empty
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262 else
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263 echolog "Copying content of rootcopy directory"
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264 cp -af $DATA/rootcopy/* $UNION 2>/dev/null # may be empty
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265 fi
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266
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267 # TODO: if copy2ram is used, there is no need to preserve the original in memory anymore
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268 #if [ "$DATA" = "$COPY2RAM" ]; then
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269 # rm from memory once ??
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270 #fi
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271
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272 echolog "Copying liblinuxlive library to union"
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273 cp -af /liblinuxlive $UNION/usr/lib/
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274
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275 debug_shell
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276
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277 echolog "Recreating /etc/fstab and /mnt directories"
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278 touch $UNION/etc/fstab
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279 rmdir $UNION/mnt/* 2>/dev/null
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280 fstab_update $UNION
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281 #fstab_clean $UNION
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282
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283 # everything is ready now, so we may unload unused kernel modules
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284 # and do some cleanup, unmount few things which are no longer needed.
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285 #rmmod_unused_modules
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286 #fumount /usr
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287 #fumount /sys
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288
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289 # More likely these directories aren't there.
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290 # Even if they are, this won't hurt.
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291 mkdir -p $UNION/boot
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292 mkdir -p $UNION/proc
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293 mkdir -p $UNION/sys
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294 mkdir -p $UNION/dev
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295 mkdir -p $UNION/tmp
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296 chmod 1777 $UNION/tmp
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297
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298 # Boot will contain whatever was in ./boot directory in the bootable media
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299 # Error output goes to null, as nothing is mounted with copy2ram
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300 #mount -n -o rbind $(dirname $DATA)/boot $UNION/boot 2>/dev/null
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301
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302 # Union contains all the files and directories unioned from all modules.
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303 # Change root directory to it, and move initrd's root to /mnt/live/initramdisk
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304 # Finaly execute /sbin/init to start the distribution.
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305 echolog "changing root directory..."
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306
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307 cd $UNION
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308 mkdir -p $INITRAMDISK
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309
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310 # Copy all dev files (found by mdev) to unioned dev directory
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311 # so at least disk devices exist (your Linux may need them).
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312 # Two exceptions, do not copy pty* and tty* devs.
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313 if [ "$(cmdline_parameter nohotplug)" ]; then
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314 cp -fdR /dev . 2>/dev/null
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315 #else
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316 #mount -n -o move /dev dev
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317 fi
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318
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319 #mount -n -o move /proc proc
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320 #mount -n -o move /sys sys
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321 fumount /sys
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322
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323 if [ ! -e /dev/console ]; then mknod /dev/console c 5 1; fi
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324
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325 # find chroot and init
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326 if [ -x bin/chroot ]; then CHROOT=bin/chroot; fi
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327 if [ -x sbin/chroot ]; then CHROOT=sbin/chroot; fi
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328 if [ -x usr/bin/chroot ]; then CHROOT=usr/bin/chroot; fi
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329 if [ -x usr/sbin/chroot ]; then CHROOT=usr/sbin/chroot; fi
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330 if [ "$CHROOT" = "" ]; then fatal "Can't find executable chroot command"; fi
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331
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332 if [ -x bin/init ]; then INIT=bin/init; fi
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333 if [ -x sbin/init ]; then INIT=sbin/init; fi
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334 if [ "$INIT" = "" ]; then fatal "Can't find executable init command"; fi
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335
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336 # time to end Linux Live scripts and start the distribution itself,
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337 # using /sbin/init or whatever was found.
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338
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339 debug_shell
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340
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341 fumount /proc
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342
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343 mount -n -o remount,ro aufs .
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344
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345 # We will copy init from the distro to initrd (there should be 2MB free)
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346 # This allows us to use the cleanup script during reboot, as init will be
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347 # started from memory and not from the union and /union will not be busy.
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348
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349 cp -af $INIT /bin >/dev/null 2>&1
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350 if [ $? -eq 0 ]; then
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351 pivot_root . $INITRAMDISK
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352 exec $CHROOT . $INITRAMDISK/bin/init <dev/console >dev/console 2>&1
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353 else # If copying fails, start init directly.
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354 pivot_root . $INITRAMDISK
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355 exec $CHROOT . $INIT <dev/console >dev/console 2>&1
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slaxemulator@0
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356 fi
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slaxemulator@0
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357
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slaxemulator@0
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358 header "!!ERROR!!"
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slaxemulator@0
|
359 fatal "You are not supposed to be here, something went wrong!"
|