| 1 | #!/bin/sh |
| 2 | |
| 3 | # |
| 4 | # initramfs /init (busybox ash) |
| 5 | # |
| 6 | |
| 7 | # color codes and some predefined texts |
| 8 | BOLD="\033[1m" |
| 9 | NORM="\033[0m" |
| 10 | RED="\033[31m" |
| 11 | GREEN="\033[32m" |
| 12 | YELLOW="\033[33m" |
| 13 | BLUE="\033[34m" |
| 14 | OK="${BOLD}${GREEN}OK${NORM}" |
| 15 | FAILED="${BOLD}${RED}FAILED${NORM}" |
| 16 | |
| 17 | # helper functions |
| 18 | |
| 19 | # check an exit value and print a colored status |
| 20 | checkReturn() { |
| 21 | if [ $? -ne 0 ] |
| 22 | then |
| 23 | echo -e $FAILED |
| 24 | else |
| 25 | echo -e $OK |
| 26 | fi |
| 27 | } |
| 28 | |
| 29 | # search for and mount the crux media, populate a tmpfs from it, |
| 30 | # and prepare /newroot for switch_root at the end of the script |
| 31 | find_and_mount_media() { |
| 32 | echo -e -n " ${BOLD}${BLUE}*${NORM} Creating and mounting tmpfs... " |
| 33 | mkdir /.tmpfs |
| 34 | mount -t tmpfs tmpfs /.tmpfs |
| 35 | checkReturn |
| 36 | |
| 37 | echo -e " ${BOLD}${BLUE}*${NORM} Searching for the CRUX media..." |
| 38 | mkdir -p /.tmpfs/.media |
| 39 | CRUXMEDIA="" |
| 40 | CDROM_DEVICES="`grep 'drive name:' /proc/sys/dev/cdrom/info | awk '{print $3 }'`" |
| 41 | MMC_DEVICES="`grep -E 'mmcblk' /proc/partitions | awk '{ print $4 }'`" |
| 42 | BLOCK_DEVICES="`grep -E '[sh]d' /proc/partitions | awk '{ print $4 }'`" |
| 43 | for DEV in $CDROM_DEVICES $MMC_DEVICES $BLOCK_DEVICES |
| 44 | do |
| 45 | DEV="/dev/$DEV" |
| 46 | mount -r $DEV /.tmpfs/.media 2> /dev/null |
| 47 | if [ $? -eq 0 ] |
| 48 | then |
| 49 | echo -e -n " ${BOLD}${GREEN}*${NORM} Found media on $DEV" |
| 50 | if [ -e /.tmpfs/.media/crux-media ] |
| 51 | then |
| 52 | echo ", CRUX media." |
| 53 | CRUXMEDIA=$DEV |
| 54 | #ln -s $DEV /dev/media |
| 55 | break |
| 56 | else |
| 57 | echo ", but it's not the CRUX media." |
| 58 | umount /.tmpfs/.media |
| 59 | fi |
| 60 | else |
| 61 | echo -e " ${BOLD}${YELLOW}*${NORM} No media found on $DEV." |
| 62 | fi |
| 63 | done |
| 64 | |
| 65 | # check if the media was mounted properly. if not, spawn a shell |
| 66 | if [ ! -e /.tmpfs/.media/crux-media ] |
| 67 | then |
| 68 | echo |
| 69 | echo -e " ${BOLD}${RED}*${NORM} The CRUX media was not properly mounted!" |
| 70 | echo " Spawning a shell for you to attempt to fix this problem. If" |
| 71 | echo " you are able to find the correct device, mount it at" |
| 72 | echo " /.tmpfs/.media and then log out of this shell to continue." |
| 73 | echo " If you are NOT able to fix the problem, installation will" |
| 74 | echo " not be possible." |
| 75 | echo |
| 76 | /bin/sh |
| 77 | fi |
| 78 | |
| 79 | # check again and stop if it's still not there |
| 80 | if [ ! -e /.tmpfs/.media/crux-media ] |
| 81 | then |
| 82 | echo |
| 83 | echo -e " ${BOLD}${RED}*${NORM} The CRUX media still appears not to be" |
| 84 | echo " found and installation will not continue." |
| 85 | echo |
| 86 | sleep 99999 |
| 87 | exit 1 |
| 88 | fi |
| 89 | |
| 90 | echo -e " ${BOLD}${BLUE}*${NORM} Populating root filesystem..." |
| 91 | mkdir -p /newroot |
| 92 | echo -e -n " ${BOLD}${BLUE}*${NORM} Mounting new root filesystem... " |
| 93 | mount -t tmpfs tmpfs /newroot |
| 94 | checkReturn |
| 95 | echo -e -n " ${BOLD}${BLUE}*${NORM} Copying files from rootfs.tar.xz... " |
| 96 | tar -xpf /.tmpfs/.media/rootfs.tar.xz -C /newroot |
| 97 | checkReturn |
| 98 | echo -e -n " ${BOLD}${BLUE}*${NORM} Copying devices from rootfs... " |
| 99 | cp -af /dev/* /newroot/dev |
| 100 | checkReturn |
| 101 | mkdir -p /newroot/dev/pts /newroot/media |
| 102 | |
| 103 | # the media gets unmounted here and remounted after switch_root |
| 104 | umount /.tmpfs/.media |
| 105 | rmdir /.tmpfs/.media |
| 106 | sed -i -e "s,#CRUXMEDIA#,${CRUXMEDIA}," /newroot/etc/fstab |
| 107 | |
| 108 | echo -e -n " ${BOLD}${BLUE}*${NORM} Unmounting tmpfs... " |
| 109 | umount /.tmpfs |
| 110 | checkReturn |
| 111 | rmdir /.tmpfs |
| 112 | } |
| 113 | |
| 114 | /bin/busybox --install -s /bin |
| 115 | |
| 116 | # |
| 117 | # main script |
| 118 | # |
| 119 | |
| 120 | echo "" |
| 121 | echo -e "${BOLD}CRUX-ARM 2.7.1 - ${BLUE}http://crux-arm.nu/${NORM}" |
| 122 | echo "" |
| 123 | |
| 124 | exec >/dev/console </dev/console 2>&1 |
| 125 | |
| 126 | echo -e -n " ${BOLD}${BLUE}*${NORM} Mounting " |
| 127 | echo -e -n "${BOLD}${GREEN}/proc${NORM}" |
| 128 | mount -t proc proc /proc |
| 129 | |
| 130 | PRINTK="`cat /proc/sys/kernel/printk`" |
| 131 | echo "0" > /proc/sys/kernel/printk |
| 132 | |
| 133 | echo -e ", ${BOLD}${GREEN}/sys${NORM}." |
| 134 | mount -t sysfs sysfs /sys |
| 135 | |
| 136 | echo -e -n " ${BOLD}${BLUE}*${NORM} Populating /dev via mdev... " |
| 137 | mdev -s |
| 138 | checkReturn |
| 139 | |
| 140 | echo -e -n " ${BOLD}${BLUE}*${NORM} Registering mdev as hotplug agent... " |
| 141 | echo "/bin/mdev" > /proc/sys/kernel/hotplug |
| 142 | checkReturn |
| 143 | |
| 144 | if [ -d /lib/modules ] |
| 145 | then |
| 146 | echo -e -n " ${BOLD}${BLUE}*${NORM} Loading modules... " |
| 147 | # TODO |
| 148 | else |
| 149 | echo -e " ${BOLD}${YELLOW}*${NORM} No modules were found in the initial RAM filesystem." |
| 150 | fi |
| 151 | |
| 152 | grep -q "devicetimeout=*" /proc/cmdline |
| 153 | if [ $? -eq 0 ] |
| 154 | then |
| 155 | for opt in `cat /proc/cmdline` |
| 156 | do |
| 157 | echo "$opt" | grep -q "devicetimeout=" |
| 158 | if [ $? -eq 0 ] |
| 159 | then |
| 160 | DEVTIMEOUT=`echo $opt | cut -d'=' -f2` |
| 161 | fi |
| 162 | done |
| 163 | else |
| 164 | DEVTIMEOUT=10 |
| 165 | fi |
| 166 | echo -e " ${BOLD}${BLUE}*${NORM} Waiting $DEVTIMEOUT seconds for devices to settle..." |
| 167 | sleep $DEVTIMEOUT |
| 168 | |
| 169 | # if root=/dev/XXX was specified on the command line, use that as the new root |
| 170 | # instead of searching for the media and using it. if it fails, fall back to the media |
| 171 | grep -q "root=/dev/*" /proc/cmdline |
| 172 | if [ $? -eq 0 ] |
| 173 | then |
| 174 | for opt in `cat /proc/cmdline` |
| 175 | do |
| 176 | echo "$opt" | grep -q "root=" |
| 177 | if [ $? -eq 0 ] |
| 178 | then |
| 179 | ROOTDEV=`echo $opt | cut -d'=' -f2` |
| 180 | fi |
| 181 | done |
| 182 | mkdir -p /newroot |
| 183 | # check the specified root device to see if it has an init |
| 184 | mount $ROOTDEV /newroot |
| 185 | if [ $? -ne 0 ] |
| 186 | then |
| 187 | echo -e " ${BOLD}${RED}*${NORM} Unable to mount the specified root device! Falling back to the live media." |
| 188 | find_and_mount_media |
| 189 | else |
| 190 | if [ -x /newroot/sbin/init ] |
| 191 | then |
| 192 | echo -e " ${BOLD}${BLUE}*${NORM} Mounted root device $ROOTDEV." |
| 193 | else |
| 194 | echo -e " ${BOLD}${RED}*${NORM} The specified root device ($ROOTDEV) does not appear to be usable! Falling back to the live media." |
| 195 | umount /newroot |
| 196 | find_and_mount_media |
| 197 | fi |
| 198 | fi |
| 199 | else |
| 200 | find_and_mount_media |
| 201 | fi |
| 202 | |
| 203 | echo -e "${BOLD}${BLUE}*${NORM} Switching root.\n" |
| 204 | echo "$PRINTK" > /proc/sys/kernel/printk |
| 205 | echo > /proc/sys/kernel/hotplug |
| 206 | umount /sys |
| 207 | umount /proc |
| 208 | exec /bin/switch_root /newroot /sbin/init |
| 209 | |
| 210 | echo "Something's broken, here's a shell." |
| 211 | exec /bin/sh |
| 212 | |
| 213 | # End of file |