a09b427d1c
isirc: lvm instead symlinks (vgscan, ...) will be called with --sysinit. flags: NOSEC: default, on failure, isirc crashes and no shell will start. but NOSEC will allow isirc to start a shell for debugging. if you have a secure grub-config and nobody should be able to start a root-shell, this will be default. else NOSEC is interesting for debugging. init: yes, init=/bin/sh will be possible. NOSEC is not needed. isirdsh: start a shell before mounting. needs NOSEC. ISIRDSH: start a shell after mounting and before switch root. needs NOSEC.
77 lines
1.3 KiB
Bash
Executable file
77 lines
1.3 KiB
Bash
Executable file
#!/bin/sh
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PATH=/bin
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export PATH
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QUITE=${QUITE:-false}
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NOSEC=false
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log() {
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[ "X$QUITE" != "Xtrue" ] && echo "$*"
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}
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err() {
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echo "$*" >&2
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}
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if [ "x${1}x" != "x-rx" ]
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then
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exec </dev/console >/dev/console 2>&1
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log "### ISIRD ###"
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cd /
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log " mount proc and sysfs and / as rw"
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -o remount,rw /
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log " mdev"
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mdev -s
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log " activate volume groups"
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lvm vgscan --mknodes --sysinit
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lvm vgchange --sysinit -P -a y
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if cmdline -c NOSEC
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then
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NOSEC=true
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fi
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if [ Xtrue = "X$NOSEC" ] && cmdline -c isirdsh
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then
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log " start shell"
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exec sh
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fi
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else
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log " returned"
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fi
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ROOT="$(cmdline -c root)"
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FLAGS="$(cmdline -c rootflags)"
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if cmdline -c ro
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then FLAGS="${FLAGS},ro"
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elif cmdline -c rw
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then FLAGS="${FLAGS},rw"
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fi
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FSTYPE="$(cmdline -c rootfstype)"
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FSTYPE="${FSTYPE:-auto}"
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log " umount sysfs"
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umount /sys
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FLAGS="${FLAGS#,}"
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log " mount ${ROOT} as ${FSTYPE} with ${FLAGS}"
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if ! mount -o "${FLAGS}" -t "${FSTYPE}" "${ROOT}" /mnt
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then
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err "Can't mount root!"
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[ Xtrue = "X$NOSEC" ] && exec sh
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fi
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# ISIRDSH -> shell for debugging, testing, what ever...
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if [ Xtrue = "X$NOSEC" ] && cmdline -c ISIRDSH
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then
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exec sh
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fi
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INIT="$(cmdline -c init)"
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INIT="${INIT:-/sbin/init}"
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cd /mnt
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log " Change to new root"
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exec switch_root /mnt "$INIT"
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