slitaz-boot-scripts annotate init @ rev 371

init: use busybox mount
author Pascal Bellard <pascal.bellard@slitaz.org>
date Tue Jun 10 10:33:58 2014 +0200 (2014-06-10)
parents 9019e55a67d8
children 3b5dd12d6e46
rev   line source
pascal@276 1 #!/bin/sh
pascal@276 2
paul@351 3 ### cached kernel parameters :
pascal@341 4 #
pascal@341 5 # modprobe=
pascal@341 6 # list of modules to load, example modprobe=r8169,btrfs
pascal@341 7 #
pascal@342 8 ### Frugal mode or live CD : using a root ram disk.
pascal@341 9 #
pascal@341 10 # tmpram= [RAMDISK]
pascal@341 11 # minimum % of free RAM to build the root tmpfs, default 100
pascal@341 12 # a lower value may work, such as 50
pascal@341 13 # rootfssize= [RAMDISK]
pascal@341 14 # size of / regarding the RAM size, default 90%
pascal@341 15 #
pascal@342 16 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
pascal@342 17 ### Any rootfs should fit, minimum required is slitaz-base.
pascal@341 18 #
pascal@341 19 # mount= [MOUNT]
pascal@341 20 # device with root loop file or sub directory
pascal@341 21 # posixovl [MOUNT]
pascal@341 22 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
pascal@341 23 # loopfs= [MOUNT]
pascal@341 24 # loop file for root filesystem
pascal@341 25 # subroot= [MOUNT]
pascal@341 26 # sub directory for root filesystem
paul@351 27 # bindfs= [MOUNT] (deprecated)
pascal@341 28 # bind out of root tree part
pascal@341 29 #
pascal@342 30 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
pascal@341 31 #
pascal@341 32 # dmraid= [RAID]
pascal@341 33 # root semi hardware raid device name in /dev/mapper
pascal@341 34 # softraid= [RAID]
pascal@341 35 # root software device name in /dev/mapper
pascal@341 36 # lvmroot= [LVM]
pascal@341 37 # root logical volume name in /dev/mapper
pascal@341 38 # cryptoroot= [CRYPTO]
pascal@341 39 # encrypted root device using luks or loop-aes
pascal@341 40 #
pascal@341 41 ### Special mode used by loram flavor with aufs & squashfs
pascal@342 42 ### incremental/nested rootfs (russian dolls).
pascal@341 43 #
pascal@341 44 # rodev= [LORAM][MERGE]
pascal@341 45 # device (+ optional path) for the read only aufs branch
pascal@341 46 # rwdev= [LORAM][MERGE]
paul@351 47 # (persistent) device for the r/w aufs branch instead of the ramfs
pascal@341 48 # isofs [LORAM]
pascal@341 49 # do not use squashfs filesystem images, but the cdrom filesystem only
pascal@341 50
pascal@314 51 fail()
pascal@278 52 {
pascal@314 53 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
pascal@278 54 }
pascal@278 55
pascal@371 56 mnt()
pascal@371 57 {
pascal@371 58 busybox mount $@
pascal@371 59 }
pascal@371 60
pascal@371 61 umnt()
pascal@371 62 {
pascal@371 63 busybox umount $@
pascal@371 64 }
pascal@371 65
pascal@314 66 quit()
pascal@276 67 {
pascal@314 68 [ -d /mnt$4/etc ] || return
pascal@371 69 [ -n "$4" ] || mnt /mnt -o remount,ro
pascal@371 70 mnt --move /run /mnt/${1:-run}
pascal@314 71 cat>/run/init<<EOT
pascal@314 72 $2
pascal@314 73 x=/sbin/switch_root
pascal@314 74 [ -x \$x ] && exec \$x mnt $3 /sbin/init
pascal@276 75 EOT
pascal@314 76 fail 2mDone
pascal@314 77 exit
pascal@276 78 }
pascal@276 79
pascal@314 80 arg()
pascal@276 81 {
pascal@314 82 grep -q $1 /proc/cmdline
pascal@276 83 }
pascal@276 84
pascal@314 85 got()
pascal@276 86 {
pascal@314 87 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
pascal@276 88 }
pascal@276 89
pascal@314 90 msg()
pascal@276 91 {
pascal@317 92 echo "Switching / to $1..."
pascal@276 93 }
pascal@276 94
pascal@314 95 use()
pascal@276 96 {
pascal@315 97 got $1 && msg "$1 $root"
pascal@276 98 }
pascal@276 99
pascal@314 100 mnt()
pascal@276 101 {
pascal@343 102 r=$(blkid 2> /dev/null | sed "s/\"//g;/$root/!d;s/:.*//;q")
pascal@343 103 r={r:-$root}
pascal@343 104 r=${r#/dev/}
pascal@314 105 r=/dev/${r%%/*}
pascal@314 106 d=${root#*$r}
pascal@371 107 mnt $r $1 && return
pascal@314 108 w=$(cat /sys/module/usb_storage/parameters/delay_use)
pascal@314 109 w=$((1+${w:-2}))
pascal@314 110 echo -n "Sleep $w seconds..."
pascal@314 111 sleep $w
pascal@371 112 mnt $r $1
pascal@314 113 }
pascal@314 114
pascal@314 115 mod()
pascal@314 116 {
pascal@341 117 for i in $@
pascal@341 118 do echo "Loading module: $i"
pascal@371 119 modprobe $i 2>/dev/null ||
pascal@371 120 busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
pascal@341 121 done
pascal@314 122 }
pascal@314 123
pascal@323 124 try()
pascal@314 125 {
pascal@314 126 if [ ! -d /mnt/etc ] && got cryptoroot
pascal@341 127 then mod dm-mod dm-crypt aes-256
pascal@314 128 d=${root#/dev/}
pascal@314 129 l=crypto-$d
pascal@314 130 if cryptsetup isLuks $root 2>/dev/null; then
pascal@314 131 cryptsetup luksOpen $root $l
pascal@314 132 else
pascal@314 133 read -st 60 -p "Pass phrase : " p
pascal@314 134 k=$(echo $p|hashalot -x -n 32 sha512)
pascal@314 135 echo 0 $(cat $(find /sys/block|grep /$d/size))\
pascal@314 136 crypt aes-plain $k 0 $root 0|dmsetup create $l
pascal@314 137 fi
pascal@371 138 mnt /dev/mapper/$l /mnt
pascal@314 139 fi
pascal@314 140 got subroot && return
pascal@314 141 got loopfs && return
pascal@314 142 if [ -d /mnt/etc ]
pascal@314 143 then for i in $@; do cp -a $i /mnt$(dirname $i); done
pascal@314 144 quit
pascal@314 145 fi
pascal@314 146 fail
pascal@314 147 }
pascal@314 148
pascal@323 149 lvm()
pascal@314 150 {
pascal@314 151 use lvmroot || return
pascal@314 152 mod dm-mod
pascal@314 153 vgscan --ignorelockingfailure
pascal@314 154 vgchange -ay --ignorelockingfailure
pascal@371 155 mnt /dev/mapper/$root /mnt
pascal@323 156 try /dev/mapper $1
pascal@314 157 }
pascal@314 158
pascal@314 159 ldraid()
pascal@314 160 {
pascal@314 161 while read l
pascal@314 162 do case "$l" in
pascal@314 163 *raid10*) mod raid10;;
pascal@314 164 *raid0*) mod raid0;;
pascal@314 165 *raid1*) mod raid1;;
pascal@314 166 *raid*) mod raid456;;
pascal@314 167 *mirror*) mod dm-mirror
pascal@314 168 esac
pascal@276 169 done
pascal@276 170 }
pascal@276 171
pascal@314 172 if [ "$1" != "log" ]
pascal@371 173 then mnt -t proc proc /proc
pascal@371 174 mnt -t sysfs sys /sys
pascal@371 175 mnt -t tmpfs tmpfs /run
pascal@314 176 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
pascal@314 177 $0 log 2>&1 | tee /run/boot.log
pascal@371 178 umnt /proc
pascal@371 179 umnt /sys
pascal@310 180 . /run/init
pascal@314 181 sh
pascal@314 182 fi
pascal@341 183 got modprobe && mod ${root//,/ }
pascal@317 184 ln -s $(sed '/name/!ds/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
pascal@314 185 if use dmraid
pascal@314 186 then dmraid -s|sed '/^type/!ds/.*: *//'|ldraid
pascal@314 187 [ ${root:0:4} = /dev ] ||
pascal@314 188 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
pascal@314 189 dmraid -ay
pascal@314 190 fi
pascal@314 191 if use softraid
pascal@314 192 then mdadm -E -s -c partitions>/etc/mdadm.conf
pascal@314 193 grep -qs " $root " /etc/mdadm.conf ||
pascal@314 194 root=$(awk '/dev.md/{print $2;exit}'</etc/mdadm.conf)
pascal@314 195 grep level=raid /etc/mdadm.conf|ldraid
pascal@314 196 for i in 1 2 3 4 5 6 7 8 9
pascal@314 197 do sleep $i
pascal@314 198 mdadm -A -s
pascal@314 199 grep -qs ': act' /proc/mdstat && break
pascal@314 200 done
pascal@323 201 lvm /etc/mdadm.conf
pascal@314 202 fi
pascal@323 203 lvm
pascal@314 204 if got mount
pascal@314 205 then dev=$root
pascal@315 206 x=$(blkid|grep $dev|sed 's/:.*//;q')
pascal@315 207 root=${x:-$dev}
pascal@314 208 [ "$dev" = "$root" ] || dev="$root ($dev)"
pascal@314 209 echo "Mount $dev..."
pascal@314 210 mnt /mnt
pascal@353 211 arg posixovl && echo "And posixovl..." &&
pascal@354 212 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
pascal@314 213 fi
pascal@314 214 got loopfs && echo "Into file $root..." &&
pascal@371 215 losetup /dev/loop0 /mnt/$root && mnt /dev/loop0 /mnt
pascal@317 216 got bindfs && echo "Bind ${root/,/ to }..." &&
pascal@371 217 mnt --bind /mnt/${root%,*} /mnt/${root/,//}
pascal@323 218 arg cryptoroot= && try
pascal@314 219 if use subroot
pascal@314 220 then cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
pascal@314 221 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
pascal@314 222 r=$root/run
pascal@314 223 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
pascal@323 224 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
pascal@314 225 fi
pascal@321 226 quit
pascal@314 227 msg tmpfs
pascal@314 228 root=100
pascal@314 229 got tmpram
pascal@314 230 r=$root
pascal@314 231 root=90%
pascal@314 232 got rootfssize
pascal@314 233 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
pascal@371 234 mnt -t tmpfs -o size=$root tmpfs /mnt &&
pascal@314 235 for i in $(ls -ar /)
pascal@314 236 do case "$i" in
pascal@317 237 .*|cdrom) ;;
pascal@314 238 mnt|proc|sys) mkdir /mnt/$i;;
pascal@314 239 usr|var|rootfs*) mv /$i /mnt;;
pascal@314 240 *) cp -a /$i /mnt 2>/dev/null && continue
pascal@314 241 fail
pascal@371 242 umnt /mnt
pascal@314 243 exit
pascal@276 244 esac
pascal@314 245 done || fail 3mSkipped
pascal@314 246 quit
pascal@323 247 mod squashfs 2>/dev/null || exit
pascal@314 248 msg aufs
pascal@314 249 br=/mnt/.rw
pascal@314 250 mkdir $br
pascal@314 251 got rwdev && mnt $br && br=$br$d
pascal@314 252 o=
pascal@314 253 p=
pascal@314 254 c=/mnt/.cdrom
pascal@314 255 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]
pascal@332 256 then root=/dev/cdrom/fs
pascal@314 257 got rodev
pascal@314 258 mkdir -p $c /mnt$c /mnt/.rw$c
pascal@314 259 mnt $c
pascal@314 260 o="-o 124"
pascal@314 261 p=/.cdrom/boot
pascal@318 262 c=$c$d
pascal@276 263 fi
pascal@314 264 l=0
pascal@314 265 r=
pascal@314 266 got isofs || for i in /mnt$p/rootfs?*.gz
pascal@314 267 do fs=${i#*root}
pascal@314 268 r=$r:/mnt/.$fs
pascal@314 269 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
pascal@314 270 losetup $o /dev/loop$l $i
pascal@371 271 mnt -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
pascal@276 272 done
pascal@314 273 mod aufs
pascal@371 274 mnt -t aufs -o br=$br${r:-:$c} none /mnt
pascal@314 275 quit