| 1 | #!/bin/bash -e |
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| 2 | |
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| 3 | # debirf: script to build debirf system. |
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| 4 | # |
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| 5 | # The debirf scripts were written by |
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| 6 | # Jameson Rollins <jrollins@fifthhorseman.net> |
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| 7 | # and |
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| 8 | # Daniel Kahn Gillmor <dkg-debian.org@fifthhorseman.net>. |
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| 9 | # |
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| 10 | # They are Copyright 2007, and are all released under the GPL, |
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| 11 | # version 3 or later. |
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| 12 | |
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| 13 | ############################################################### |
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| 14 | ### VARIABLES |
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| 15 | |
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| 16 | CMD=$(basename $0) |
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| 17 | |
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| 18 | DEBIRF_COMMON=${DEBIRF_COMMON:-"/usr/share/debirf/common"} |
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| 19 | source "$DEBIRF_COMMON" |
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| 20 | |
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| 21 | # default build type |
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| 22 | export ROOT_BUILD=false |
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| 23 | |
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| 24 | # stages to run by default |
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| 25 | STAGE_ROOT=true |
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| 26 | STAGE_MODULES=true |
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| 27 | STAGE_INITRD=true |
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| 28 | |
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| 29 | ROOT_WARNING=true |
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| 30 | |
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| 31 | # location of devices.tar.gz file |
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| 32 | export DEVICE_ARCHIVE=/usr/share/debirf/devices.tar.gz |
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| 33 | |
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| 34 | # list of packages to include/exclude from debootstrap |
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| 35 | export INCLUDE=less,udhcpc |
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| 36 | export EXCLUDE=apt-utils,bsdmainutils,cron,ed,dhcp3-common,dhcp3-client,info,logrotate,man-db,manpages,tasksel,tasksel-data,tcpd,traceroute |
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| 37 | |
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| 38 | ############################################################### |
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| 39 | ### FUNCTIONS |
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| 40 | |
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| 41 | usage() { |
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| 42 | cat <<EOF |
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| 43 | Usage: $CMD <subcommand> [options] [args] |
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| 44 | Debirf system tool. |
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| 45 | |
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| 46 | subcommands: |
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| 47 | make [options] PROFILE build debirf profile (make kernel and initramfs) |
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| 48 | -c|--check-vars check variables before make |
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| 49 | -n|--new create new root, even if old one exists |
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| 50 | -o|--overwrite debootstrap on top of old root if it exists |
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| 51 | -s|--skip skip debootstrap step if old root exists |
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| 52 | -r|--root-build use real chroot to build instead of fakechroot |
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| 53 | (requires superuser privileges or CAP_SYS_CHROOT) |
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| 54 | -w|--no-warning skip superuser warning |
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| 55 | -d|--no-initrd do not make initramfs |
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| 56 | -i|--initrd-only just remake initramfs from existing root |
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| 57 | -k|--kernel=KERNEL install KERNEL .deb, instead of default kernel |
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| 58 | enter PROFILE [CMDS] enter shell in debirf profile root changes |
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| 59 | (optional execute CMDS in root and exit) |
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| 60 | help this help |
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| 61 | |
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| 62 | EOF |
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| 63 | } |
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| 64 | |
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| 65 | usage_profile() { |
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| 66 | cat <<EOF |
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| 67 | It looks like your profile is not correctly formed. Please refer to the |
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| 68 | README file included with this package on how to setup a profile. |
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| 69 | EOF |
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| 70 | } |
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| 71 | |
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| 72 | failure() { |
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| 73 | echo "$1" >&2 |
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| 74 | exit ${2:-'1'} |
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| 75 | } |
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| 76 | |
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| 77 | create_debootstrap() { |
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| 78 | mkdir -p "$DEBIRF_ROOT" |
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| 79 | if [ "$ROOT_BUILD" = 'true' ] ; then |
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| 80 | /usr/sbin/debootstrap --exclude="$EXCLUDE" "$DEBIRF_DISTRO" "$DEBIRF_ROOT" "$DEBIRF_MIRROR" |
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| 81 | else |
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| 82 | fakeroot_if_needed fakechroot /usr/sbin/debootstrap --variant=fakechroot --include="$INCLUDE" --exclude="$EXCLUDE" "$DEBIRF_DISTRO" "$DEBIRF_ROOT" "$DEBIRF_MIRROR" |
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| 83 | fi |
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| 84 | fakeroot_if_needed mv "$DEBIRF_ROOT"/var/log/bootstrap.log "$DEBIRF_BUILDD"/.bootstrap.log |
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| 85 | } |
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| 86 | |
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| 87 | # fix the device tree in the debirf root if fakechroot variant was |
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| 88 | # used with debootstrap (default non-privileged behavior) |
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| 89 | fix_dev() { |
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| 90 | if [ -L "$DEBIRF_ROOT"/dev -o ! -d "$DEBIRF_ROOT"/dev ] ; then |
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| 91 | msg "fixing debirf root dev tree..." |
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| 92 | |
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| 93 | # remove old dev |
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| 94 | fakeroot_if_needed rm -f "$DEBIRF_ROOT"/dev |
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| 95 | |
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| 96 | # create new dev from devices archive |
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| 97 | fakeroot_if_needed sh -c "cd $DEBIRF_ROOT; tar -xzf $DEVICE_ARCHIVE" |
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| 98 | |
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| 99 | # create /dev/console |
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| 100 | fakeroot_if_needed sh -c "mknod $DEBIRF_ROOT/dev/console c 5 1; chmod 0600 $DEBIRF_ROOT/dev/console" |
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| 101 | fi |
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| 102 | } |
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| 103 | |
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| 104 | # run modules in modules directory |
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| 105 | run_modules() { |
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| 106 | fakeroot_if_needed run-parts --verbose --exit-on-error "$DEBIRF_MODULES" |
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| 107 | } |
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| 108 | |
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| 109 | # pack the rootfs archive |
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| 110 | # takes one input argument as name of output archive file |
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| 111 | pack_rootfs() { |
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| 112 | # need to pack archive in fakechroot/chroot so that symlinks correctly |
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| 113 | # point within debirf root, instead of to host path |
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| 114 | fakeroot_if_needed fakechroot chroot "$DEBIRF_ROOT" sh -c "find * | cpio --create -H newc" | gzip > "$1" |
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| 115 | } |
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| 116 | export -f pack_rootfs |
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| 117 | |
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| 118 | |
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| 119 | ## create_initrd functions |
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| 120 | # stupid simple method |
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| 121 | create_initrd_stupid_simple() { |
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| 122 | fakeroot_if_needed ln -sf /sbin/init "$DEBIRF_ROOT/init" |
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| 123 | pack_rootfs "$DEBIRF_INITRD" |
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| 124 | } |
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| 125 | |
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| 126 | # nested cpio archives |
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| 127 | create_initrd_nested() { |
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| 128 | local util lib |
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| 129 | local NEST_ROOT="$DEBIRF_BUILDD"/nest |
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| 130 | |
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| 131 | # make the nested root |
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| 132 | rm -rf "$NEST_ROOT" |
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| 133 | mkdir -p "$NEST_ROOT"/{bin,lib} |
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| 134 | |
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| 135 | # copy needed executables into nest |
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| 136 | cp -f /bin/{busybox,cpio} "$NEST_ROOT"/bin/ |
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| 137 | for util in awk free grep gunzip ls mkdir mount sh umount ; do |
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| 138 | ln "$NEST_ROOT"/bin/busybox "$NEST_ROOT"/bin/"$util" |
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| 139 | done |
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| 140 | cp -f /usr/lib/klibc/bin/run-init "$NEST_ROOT"/bin/ |
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| 141 | |
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| 142 | # copy in needed libraries |
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| 143 | for lib in $(ldd "$NEST_ROOT"/bin/* | egrep '*.so.[[:digit:]]+ \(0x[[:xdigit:]]{8}\)$' | sed -r 's|.*[[:space:]](/[^[[:space:]]*)[[:space:]]\(0x[[:xdigit:]]{8}\)$|\1|' | sort -u) ; do |
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| 144 | # pull libraries from most basic place libraries can live |
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| 145 | # (avoid arch change between build env and debirf) |
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| 146 | lib=/lib/$(basename "$lib") |
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| 147 | echo -e "$lib\n$(readlink -f $lib)" | cpio --pass-through --make-directories "$NEST_ROOT"/ |
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| 148 | done |
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| 149 | cp -f /lib/klibc-* "$NEST_ROOT"/lib/ |
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| 150 | |
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| 151 | # create nest init |
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| 152 | cat > "$NEST_ROOT"/init <<EOF |
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| 153 | #!/bin/sh |
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| 154 | mkdir /proc |
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| 155 | mount -t proc proc /proc |
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| 156 | if (grep -q break=top /proc/cmdline); then |
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| 157 | echo "honoring break=top kernel arg" |
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| 158 | /bin/sh |
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| 159 | fi |
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| 160 | mkdir /newroot |
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| 161 | MEMSIZE=\$(free | grep 'Mem:' | awk '{ print \$2 }') |
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| 162 | mount -t tmpfs -o size=\${MEMSIZE}k tmpfs /newroot |
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| 163 | if (grep -q break=preunpack /proc/cmdline); then |
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| 164 | echo "honoring break=preunpack kernel arg" |
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| 165 | /bin/sh |
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| 166 | fi |
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| 167 | cd /newroot |
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| 168 | echo unpacking rootfs... |
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| 169 | # specify /bin/cpio so that it gets used instead of the busybox builtin |
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| 170 | # busybox cpio returns "need to fix this" when unpacking hard links |
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| 171 | gunzip - < /rootfs.cgz | /bin/cpio -i |
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| 172 | if (grep -q break=bottom /proc/cmdline); then |
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| 173 | echo "honoring break=bottom kernel arg" |
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| 174 | /bin/sh |
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| 175 | fi |
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| 176 | umount /proc |
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| 177 | echo running /sbin/init... |
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| 178 | exec /bin/run-init . /sbin/init < ./dev/console > ./dev/console |
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| 179 | EOF |
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| 180 | chmod a+x "$NEST_ROOT"/init |
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| 181 | |
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| 182 | msg "creating rootfs.cgz..." |
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| 183 | fakeroot_if_needed ln -sf /sbin/init "$DEBIRF_ROOT/init" |
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| 184 | pack_rootfs "$NEST_ROOT"/rootfs.cgz |
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| 185 | |
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| 186 | msg "creating wrapper cgz..." |
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| 187 | fakeroot_if_needed sh -c "cd $NEST_ROOT && find * | cpio --create -H newc" | gzip > "$DEBIRF_INITRD" |
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| 188 | } |
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| 189 | |
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| 190 | # setup profile environment |
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| 191 | setup_environment() { |
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| 192 | # source debirf.conf defaults |
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| 193 | source /usr/share/debirf/debirf.conf.defaults |
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| 194 | |
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| 195 | # check profile |
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| 196 | if [ -d "$DEBIRF_PROFILE" ] ; then |
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| 197 | echo "Loading profile '$DEBIRF_PROFILE'..." |
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| 198 | DEBIRF_CONF="$DEBIRF_PROFILE/debirf.conf" |
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| 199 | DEBIRF_MODULES="$DEBIRF_PROFILE/modules" |
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| 200 | else |
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| 201 | failure "Profile '$DEBIRF_PROFILE' not found." |
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| 202 | fi |
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| 203 | |
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| 204 | # source profile debirf.conf |
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| 205 | if [ -f "$DEBIRF_CONF" ] ; then |
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| 206 | source "$DEBIRF_CONF" |
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| 207 | else |
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| 208 | echo "Configuration file '$DEBIRF_CONF' not found." |
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| 209 | usage_profile |
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| 210 | exit 1 |
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| 211 | fi |
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| 212 | |
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| 213 | # check modules directory |
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| 214 | if [ ! -d "$DEBIRF_MODULES" ] || [ -z "$(ls "$DEBIRF_MODULES")" ] ; then |
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| 215 | echo "Modules directoy '$DEBIRF_MODULES' does not exist or is empty." |
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| 216 | usage_profile |
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| 217 | exit 1 |
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| 218 | fi |
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| 219 | for MODULE in $(find "$DEBIRF_MODULES") ; do |
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| 220 | if [ ! -s "$MODULE" ] ; then |
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| 221 | failure "Module '$MODULE' is a broken link or empty file." |
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| 222 | fi |
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| 223 | done |
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| 224 | |
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| 225 | # check buildd |
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| 226 | if [ -z "$DEBIRF_BUILDD" ] ; then |
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| 227 | failure "DEBIRF_BUILDD is not set." |
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| 228 | fi |
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| 229 | |
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| 230 | # set root directory |
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| 231 | DEBIRF_ROOT="$DEBIRF_BUILDD/root" |
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| 232 | |
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| 233 | # set fakechroot save file |
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| 234 | DEBIRF_FAKEROOT_STATE="$DEBIRF_BUILDD/.fakeroot-state.${DEBIRF_LABEL}" |
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| 235 | |
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| 236 | # export all the DEBIRF_* environment variables: |
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| 237 | for var in ${!DEBIRF_*}; do |
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| 238 | if [ $var ] ; then |
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| 239 | export $var |
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| 240 | else |
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| 241 | failure "Variable '$var' not properly set." |
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| 242 | fi |
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| 243 | done |
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| 244 | |
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| 245 | # check variables |
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| 246 | if [ "$CHECK_VARS" ] ; then |
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| 247 | echo "Debirf variables:" |
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| 248 | env | /bin/grep "^DEBIRF_" |
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| 249 | read -p "enter to continue: " OK |
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| 250 | fi |
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| 251 | } |
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| 252 | |
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| 253 | # make profile |
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| 254 | make() { |
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| 255 | # option parsing |
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| 256 | TEMP=$(getopt --options -hcnosrwdik: --longoptions help,check-vars,new,overwrite,skip,root-build,no-warning,no-initrd,initrd-only,kernel: -n "$CMD" -- "$@") |
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| 257 | |
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| 258 | if [ $? != 0 ] ; then |
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| 259 | echo "Invalid options." >&2 |
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| 260 | usage |
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| 261 | exit 1 |
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| 262 | fi |
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| 263 | |
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| 264 | # Note the quotes around `$TEMP': they are essential! |
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| 265 | eval set -- "$TEMP" |
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| 266 | |
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| 267 | while true ; do |
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| 268 | case "$1" in |
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| 269 | -c|--check-vars) |
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| 270 | CHECK_VARS=true |
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| 271 | shift 1 |
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| 272 | ;; |
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| 273 | -n|--new) |
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| 274 | WRITE_MODE=rewrite |
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| 275 | shift 1 |
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| 276 | ;; |
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| 277 | -o|--overwrite) |
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| 278 | WRITE_MODE=overwrite |
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| 279 | shift 1 |
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| 280 | ;; |
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| 281 | -s|--skip) |
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| 282 | WRITE_MODE=skip |
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| 283 | shift 1 |
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| 284 | ;; |
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| 285 | -r|--root-build) |
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| 286 | ROOT_BUILD=true |
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| 287 | shift 1 |
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| 288 | ;; |
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| 289 | -w|--no-warning) |
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| 290 | ROOT_WARNING=false |
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| 291 | shift 1 |
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| 292 | ;; |
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| 293 | -d|--no-initrd) |
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| 294 | STAGE_INITRD=false |
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| 295 | shift 1 |
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| 296 | ;; |
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| 297 | -i|--initrd-only) |
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| 298 | STAGE_ROOT=false |
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| 299 | STAGE_MODULES=false |
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| 300 | shift 1 |
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| 301 | ;; |
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| 302 | -k|--kernel) |
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| 303 | DEBIRF_KERNEL_PACKAGE="$2" |
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| 304 | shift 2 |
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| 305 | ;; |
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| 306 | --) |
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| 307 | shift |
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| 308 | ;; |
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| 309 | *) |
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| 310 | if (( $# < 1 )) ; then |
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| 311 | echo "Improper number of input arguments." |
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| 312 | usage |
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| 313 | exit 1 |
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| 314 | fi |
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| 315 | DEBIRF_PROFILE="$1" |
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| 316 | break |
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| 317 | ;; |
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| 318 | esac |
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| 319 | done |
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| 320 | |
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| 321 | if [ $(id -u) = '0' ] ; then |
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| 322 | cat <<EOF |
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| 323 | Warning: You are running debirf as root. There is a potential |
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| 324 | for improperly written modules to damage your system. |
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| 325 | EOF |
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| 326 | if [ "$ROOT_WARNING" = 'true' ] ; then |
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| 327 | read -p "Are you sure you wish to continue? [y|N]: " OK; OK=${OK:=N} |
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| 328 | if [ "${OK/y/Y}" != 'Y' ] ; then |
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| 329 | failure "aborting." |
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| 330 | fi |
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| 331 | fi |
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| 332 | fi |
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| 333 | |
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| 334 | setup_environment |
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| 335 | |
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| 336 | if [ "$DEBIRF_KERNEL_PACKAGE" ] ; then |
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| 337 | if [ -f "$DEBIRF_KERNEL_PACKAGE" ] ; then |
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| 338 | echo "Using kernel package '$DEBIRF_KERNEL_PACKAGE'." |
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| 339 | else |
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| 340 | failure "Kernel package '$DEBIRF_KERNEL_PACKAGE' not found." |
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| 341 | fi |
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| 342 | fi |
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| 343 | |
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| 344 | ### BUILD ROOT |
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| 345 | if [ "$STAGE_ROOT" = 'true' ] ; then |
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| 346 | # determine write mode |
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| 347 | if [ -d "$DEBIRF_ROOT" ] ; then |
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| 348 | if [ -z "$WRITE_MODE" ] ; then |
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| 349 | echo "Debirf root already exists. Select one of the following:" |
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| 350 | CASE1='new: delete the old root and create a new one' |
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| 351 | CASE2='overwrite: leave the old root and debootstrap on top of it' |
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| 352 | CASE3='skip: skip building the root and go right to installing modules' |
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| 353 | CASE4='exit' |
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| 354 | select CASE in "$CASE1" "$CASE2" "$CASE3" "$CASE4" ; do |
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| 355 | case "$REPLY" in |
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| 356 | 1) |
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| 357 | WRITE_MODE=rewrite |
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| 358 | ;; |
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| 359 | 2) |
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| 360 | WRITE_MODE=overwrite |
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| 361 | ;; |
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| 362 | 3) |
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| 363 | WRITE_MODE=skip |
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| 364 | ;; |
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| 365 | *) |
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| 366 | failure "aborting." |
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| 367 | ;; |
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| 368 | esac |
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| 369 | break |
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| 370 | done |
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| 371 | fi |
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| 372 | else |
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| 373 | WRITE_MODE=new |
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| 374 | fi |
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| 375 | case "$WRITE_MODE" in |
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| 376 | 'new') |
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| 377 | msg "creating debirf root..." |
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| 378 | > "$DEBIRF_FAKEROOT_STATE" |
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| 379 | create_debootstrap |
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| 380 | ;; |
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| 381 | 'rewrite') |
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| 382 | msg "clearing old debirf root..." |
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| 383 | rm -rf "$DEBIRF_ROOT" |
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| 384 | msg "creating debirf root..." |
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| 385 | > "$DEBIRF_FAKEROOT_STATE" |
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| 386 | create_debootstrap |
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| 387 | ;; |
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| 388 | 'overwrite') |
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| 389 | msg "overwriting old debirf root..." |
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| 390 | create_debootstrap |
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| 391 | ;; |
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| 392 | 'skip') |
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| 393 | msg "skipping debootstrap..." |
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| 394 | ;; |
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| 395 | *) |
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| 396 | failure "aborting." |
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| 397 | ;; |
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| 398 | esac |
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| 399 | |
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| 400 | # fix the dev tree if running as non-priv user (fakechroot debootstrap) |
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| 401 | fix_dev |
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| 402 | |
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| 403 | else |
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| 404 | echo "Not building root." |
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| 405 | fi |
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| 406 | ### END BUILD ROOT |
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| 407 | |
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| 408 | ### RUN MODULES |
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| 409 | if [ "$STAGE_MODULES" = 'true' ] ; then |
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| 410 | msg "executing modules..." |
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| 411 | run_modules |
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| 412 | msg "modules complete." |
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| 413 | else |
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| 414 | echo "Not running modules." |
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| 415 | fi |
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| 416 | ### END RUN MODULES |
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| 417 | |
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| 418 | ### BUILD INITRD |
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| 419 | if [ "$STAGE_INITRD" = 'true' ] ; then |
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| 420 | if [ ! -d "$DEBIRF_ROOT" ] ; then |
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| 421 | failure "Debirf root '$DEBIRF_ROOT' not found." |
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| 422 | fi |
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| 423 | # determine initrd name |
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| 424 | KERNEL_VERS=$(ls -1 "$DEBIRF_ROOT/lib/modules" | head -n1) |
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| 425 | DEBIRF_INITRD="${DEBIRF_BUILDD}/${DEBIRF_LABEL}_${DEBIRF_DISTRO}_${KERNEL_VERS}.cgz" |
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| 426 | |
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| 427 | msg "creating debirf initrd ('$DEBIRF_METHOD')..." |
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| 428 | create_initrd_${DEBIRF_METHOD} "$DEBIRF_INITRD" |
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| 429 | |
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| 430 | # final output |
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| 431 | DEBIRF_KERNEL=$(ls "$DEBIRF_BUILDD" | grep "vmlinu" | grep "$KERNEL_VERS$") |
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| 432 | msg "debirf initrd created." |
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| 433 | if [ "$DEBIRF_BUILDD/$DEBIRF_KERNEL" ] ; then |
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| 434 | msg "kernel: $DEBIRF_BUILDD/$DEBIRF_KERNEL" |
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| 435 | fi |
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| 436 | msg "initrd: $DEBIRF_INITRD" |
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| 437 | else |
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| 438 | echo "Not creating initramfs." |
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| 439 | fi |
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| 440 | ### END BUILD INITRD |
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| 441 | } |
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| 442 | |
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| 443 | # enter profile root |
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| 444 | enter() { |
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| 445 | DEBIRF_PROFILE="$1" |
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| 446 | shift |
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| 447 | |
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| 448 | setup_environment |
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| 449 | |
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| 450 | if [ "$1" ] ; then |
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| 451 | fakeroot_if_needed debirf_exec "$@" |
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| 452 | else |
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| 453 | fakeroot_if_needed debirf_exec bash -i |
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| 454 | fi |
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| 455 | } |
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| 456 | |
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| 457 | ############################################################### |
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| 458 | ### MAIN |
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| 459 | |
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| 460 | COMMAND="$1" |
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| 461 | [ "$COMMAND" ] || failure "Type '$CMD help' for usage." |
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| 462 | shift |
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| 463 | |
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| 464 | case $COMMAND in |
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| 465 | 'make'|'m') |
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| 466 | make "$@" |
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| 467 | ;; |
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| 468 | 'enter'|'e') |
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| 469 | enter "$@" |
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| 470 | ;; |
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| 471 | 'help'|'h'|'?') |
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| 472 | usage |
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| 473 | ;; |
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| 474 | *) |
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| 475 | failure "Unknown command: '$COMMAND' |
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| 476 | Type '$CMD help' for usage." |
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| 477 | ;; |
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| 478 | esac |
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