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Added xbps-casper-0.1 build template and sources.

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xbps-casper is a modified version of Ubuntu's casper app. And will
be simplified and modified even more in the future, if necessary.

--HG--
extra : convert_revision : 59163ef9b8b6978bc94c59ecaf0c8038b4e93e07
This commit is contained in:
Juan RP 2009-10-08 21:41:22 +02:00
parent 2d945d0b00
commit 74494eb1e3
19 changed files with 2010 additions and 0 deletions
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339
templates/xbps-casper/files/COPYING Normal file
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@ -0,0 +1,339 @@
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
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NO WARRANTY
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
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to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
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You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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templates/xbps-casper/files/bin/casper-getty Executable file
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#! /bin/sh
autologin=1
for opt in "$@" ; do
if [ "$opt" = "-l" -o "$opt" = "-n" ] ; then
autologin=0
fi
done
if [ "$autologin" = "1" ] ; then
exec /sbin/agetty -n -l /sbin/casper-login $*
else
exec /sbin/agetty $*
fi

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templates/xbps-casper/files/bin/casper-login Executable file
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#! /bin/sh
USERNAME=root
[ -f /etc/casper.conf ] && . /etc/casper.conf
exec /bin/login -f $USERNAME

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templates/xbps-casper/files/bin/casper-new-uuid Executable file
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#!/bin/sh
# -*- coding: utf-8 -*-
#
# «casper-new-uuid» - Creates and injects new UUIDs for casper disks
#
# Create new UUIDs for disks to prevent conflicts and booting the wrong casper
# directory. Particularly useful in creating recovery disks that need to be
# able to also work with recovery partitioning schemes.
#
# Copyright (C) 2008, Dell Inc.
#
# Author:
# - Mario Limonciello <Mario_Limonciello@Dell.com>
#
# This script is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this application; if not, write to the Free Software Foundation, Inc., 51
# Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##################################################################################
set -e
help() {
echo
echo "USAGE: $0 initrd.{l,g}z <path-to-new-initrd> <path-to-new-casper-uuid> "
echo
echo "initrd.{l,g}z is the absolute path to the original gzipped or lzmaed initramfs"
echo "<path-to-new-initrd> is the destination directory for the new compressed initramfs"
echo "<path-to-new-casper-uuid> is the destination directory for the new casper-uuid-TYPE "
echo
echo "if either path is absent, they will end up in the current directory "
echo "TYPE is determined by an already existing casper-uuid-* or by 'uname -s'"
}
if [ "$#" = "0" ] || [ "x$1" = x-h ] || [ "x$1" = x--help ]; then
help
exit 3
fi
CWD=`pwd`
TEMPDIR=`mktemp -d /tmp/uuid-XXXXXX`
TYPE=`uname -r | cut -d '-' -f 3`
if echo "$1" | grep ".lz$" >/dev/null; then
COMPRESSOR="lzma"
SUFFIX=".lz"
elif echo "$1" | grep ".gz$" >/dev/null; then
COMPRESSOR="gzip"
SUFFIX=".gz"
else
echo "Unsupported archive type."
exit 2
fi
if [ -z "$2" ] || [ ! -d "$2" ] || [ "$2" = "." ]; then
COMPRESS_DIR="$CWD"
else
COMPRESS_DIR="$2"
fi
if [ -z "$3" ] || [ ! -d "$3" ] || [ "$3" = "." ]; then
CASPERDIR="$CWD"
else
CASPERDIR="$3"
fi
cd "$TEMPDIR"
$COMPRESSOR -cd "$1" -S "$SUFFIX" | cpio -id
uuidgen -r > conf/uuid.conf
find . | cpio --quiet --dereference -o -H newc | $COMPRESSOR -9c > "$COMPRESS_DIR/initrd$SUFFIX"
if [ "$(ls "$CASPERDIR/casper-uuid"-* >/dev/null 2>&1 | wc -l)" = 1 ]; then
cp conf/uuid.conf "$CASPERDIR/casper-uuid"-*
else
cp conf/uuid.conf "$CASPERDIR/casper-uuid-$TYPE"
fi
cd "$CWD"
rm -rf "$TEMPDIR"

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templates/xbps-casper/files/bin/casper-snapshot Executable file
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#! /bin/bash
# casper-snapshot - utility to manage Debian Live systems snapshots
#
# This program mount a device (fallback to /tmpfs under /mnt/snapshot
# and save the /cow (or a different dir) filesystem in it for reusing
# in another casper session. Look at manpage for more info.
#
# Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# On Debian systems, the complete text of the GNU General Public License
# can be found in /usr/share/common-licenses/GPL file.
PROGRAM="`basename $0`"
VERSION=0.0.1
# Source casper conf
if [ -e /etc/casper.conf ]; then
. /etc/casper.conf
else
USERNAME=$(cat /etc/passwd | grep "999" | cut -f1 -d ':')
HOSTNAME=$(hostname)
BUILD_SYSTEM="Debian"
fi
export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
# Source helper functions
helpers="/usr/share/initramfs-tools/scripts/casper-helpers"
if [ -e "${helpers}" ]; then
. "${helpers}"
else
echo "Error: I cannot found helper functions \"${helpers}\"."
exit 1
fi
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions
MOUNTP=""
COW=""
DEV=""
DEST=""
TYPE=""
DESKTOP_LINK=""
Header ()
{
echo "${PROGRAM} - utility to do Debian Live snapshots"
echo
echo "Usage: ${PROGRAM} [-c|--cow DIRECTORY] [-d|--device DEVICE] [-o|--output FILE] [-t|--type TYPE]"
echo "Usage: ${PROGRAM} [-r|--resync-string STRING]"
echo "Usage: ${PROGRAM} [-h|--help]"
echo "Usage: ${PROGRAM} [-u|--usage]"
echo "Usage: ${PROGRAM} [-v|--version]"
}
Usage ()
{
MESSAGE=${1}
Header
echo
echo "Try \"${PROGRAM} --help\" for more information."
if [ ! -z "${MESSAGE}" ]; then
echo -e "${MESSAGE}"
exit 1
else
exit 0
fi
}
Help ()
{
Header
echo
echo "Options:"
echo " -c, --cow: specifies the copy on write directory (default: /cow)."
echo " -d, --device: specifies the output snapshot device (default: none)."
echo " -o, --output: specifies the output image file (default: $type dependent)."
echo " -r, --resync-string: internally used to resync previous made snapshots."
echo " -t, --type: specifies the snapshot type between \"squashfs\", \"ext2\" or \"cpio\".gz archive (default: cpio)"
echo -e "\nLook at casper-snapshot(1) man page for more information."
exit 0
}
Version ()
{
echo "${PROGRAM}, version ${VERSION}"
echo
echo "Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>"
echo
echo "This program is free software; you can redistribute it and/or modify"
echo "it under the terms of the GNU General Public License as published by"
echo "the Free Software Foundation; either version 2 of the License, or"
echo "(at your option) any later version."
echo
echo "This program is distributed in the hope that it will be useful,"
echo "but WITHOUT ANY WARRANTY; without even the implied warranty of"
echo "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"
echo "GNU General Public License for more details."
echo
echo "You should have received a copy of the GNU General Public License"
echo "along with this program; if not, write to the Free Software"
echo "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA"
echo
echo "On Debian systems, the complete text of the GNU General Public License"
echo "can be found in /usr/share/common-licenses/GPL file."
echo
echo "Homepage: <http://live.debian.net/>"
exit 0
}
Do_snapshot ()
{
case "${TYPE}" in
squashfs)
echo "./tmp/exclude_list" > /tmp/exclude_list
( cd "${COW}" && find . -name '*.wh.*' >> /tmp/exclude_list )
mksquashfs "${COW}" "${DEST}" -ef /tmp/exclude_list || exit 1
rm /tmp/exclude_list
;;
cpio)
( cd "${COW}" && find . -path '*.wh.*' -prune -o -print0 | cpio --quiet -o0 -H newc | gzip -9c > "${DEST}" ) || exit 1
;;
ext2)
DU_DIM="`du -ks ${COW} | cut -f1`"
REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here...
genext2fs --size-in-blocks=${REAL_DIM} --reserved-percentage=0 --root="${COW}" "${DEST}" || exit 1
;;
*)
echo "Internal error."
exit 1
;;
esac
}
Is_same_mount ()
{
dir1="`Base_path $1`"
dir2="`Base_path $2`"
if [ "${dir1}" == "${dir2}" ]; then
return 0
else
return 1
fi
}
Parse_args ()
{
# Parse command line
ARGUMENTS="`getopt --longoptions cow:,device:,output,resync-string:,type:,help,usage,version --name=${PROGRAM} --options c:d:o:t:r:,h,u,v --shell sh -- "$@"`"
if [ "$?" != "0" ]; then
echo "Terminating." >&2
exit 1
fi
eval set -- "${ARGUMENTS}"
while true; do
case "$1" in
-c|--cow)
SNAP_COW="$2"; shift 2 ;;
-d|--device)
SNAP_DEV="$2"; shift 2 ;;
-o|--output)
SNAP_OUTPUT="$2"; shift 2 ;;
-t|--type)
SNAP_TYPE="$2"; shift 2 ;;
-r|--resync-string)
SNAP_RSTRING="$2"; break ;;
-h|--help)
Help; shift ;;
-u|--usage)
Usage ; shift ;;
-v|--version)
Version; shift ;;
--)
shift; break ;;
*)
echo "Internal error."; exit 1 ;;
esac
done
}
Mount_device ()
{
dev="$1"
if [ ! -d "${MOUNTP}" ]; then
mkdir -p "${MOUNTP}"
fi
if [ -z "${dev}" ]; then
# create a temp
mount -t tmpfs -o rw tmpfs "${MOUNTP}"
if [ ! -L /home/$USERNAME/Desktop/casper-snapshot ]; then
ln -s "${MOUNTP}" /home/$USERNAME/Desktop/casper-snapshot
fi
else
if [ -b "${dev}" ] ; then
try_mount "${dev}" "${MOUNTP}" rw
fi
fi
}
Defaults ()
{
MOUNTP="/mnt/casper-snapshot"
COW="/cow"
DEV=""
TYPE="cpio"
DESKTOP_LINK=/home/$USERNAME/Desktop/casper-snapshot
if [ -n "${SNAP_RSTRING}" ]; then
COW=$(echo "${SNAP_RSTRING}" | cut -f1 -d ':')
DEV=$(echo "${SNAP_RSTRING}" | cut -f2 -d ':')
DEST="${MOUNTP}/$(echo "${SNAP_RSTRING}" | cut -f3 -d ':')"
case "${DEST}" in
*.cpio.gz)
TYPE="cpio" ;;
*.squashfs)
TYPE="squashfs" ;;
"")
TYPE="ext2" ;;
*.ext2)
TYPE="ext2" ;;
*)
Usage "Unrecognized String" ;;
esac
else
DEF_COW="/cow"
# Bad options handling
if [ -z "${SNAP_COW}" ]; then
COW="${DEF_COW}"
else
COW="${SNAP_COW}"
fi
case "${SNAP_TYPE}" in
"cpio"|"squashfs"|"ext2")
TYPE="${SNAP_TYPE}"
;;
"")
TYPE="cpio" ;;
*)
Usage "Error: unrecognized snapshot type"
;;
esac
case "${TYPE}" in
cpio)
DEST="${MOUNTP}/casper-sn.cpio.gz" ;;
squashfs)
DEST="${MOUNTP}/casper-sn.squashfs" ;;
ext2)
DEST="${MOUNTP}/casper-sn.ext2" ;;
*)
echo "Internal error."
exit 1
;;
esac
#if [ -d
#if Is_same_mount
fi
# check vars
if [ ! -d "${COW}" ]; then
Usage "Error: ${COW} is not a directory"
fi
Mount_device $DEV
}
Clean ()
{
if [ -n "$DEV" ]; then
umount "${MOUNTP}"
rmdir "${MOUNTP}"
rm
fi
}
Main ()
{
Parse_args "$@"
Defaults
Do_snapshot
Clean
}
Main "$@"

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# This file should go in /etc/casper.conf
# Supported variables are:
# USERNAME, USERFULLNAME, HOST, BUILD_SYSTEM
export USERNAME="anon"
export USERFULLNAME="Anonymous live session user"
export HOST="xbps-live"
export BUILD_SYSTEM="XBPS"

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COMPCACHE_SIZE="25%"

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#!/bin/sh -e
# initramfs hook for casper
PREREQS=""
# Output pre-requisites
prereqs()
{
echo "$PREREQS"
}
case "$1" in
prereqs)
prereqs
exit 0
;;
esac
. /usr/share/initramfs-tools/hook-functions
manual_add_modules unionfs
manual_add_modules aufs
# unionfs-fuse, if available
if [ -x /usr/bin/unionfs-fuse ]; then
copy_exec /usr/bin/unionfs-fuse /bin
fi
# We need losetup
copy_exec /sbin/losetup /sbin
# Casper hooks
mkdir -p ${DESTDIR}/lib/udev
copy_exec /lib/udev/cdrom_id /lib/udev
copy_exec /lib/udev/path_id /lib/udev
# cifs boot
if [ -x /sbin/mount.cifs ]; then
copy_exec /sbin/mount.cifs /sbin
for x in cifs; do
manual_add_modules ${x}
done
fi
# squashfs
manual_add_modules squashfs
manual_add_modules loop
# random file system modules
manual_add_modules vfat
manual_add_modules ext3
manual_add_modules ext4
# needed for vfat. :-/
manual_add_modules nls_cp437
manual_add_modules nls_utf8
manual_add_modules nls_iso8859-1
# cdrom modules
manual_add_modules sr_mod
manual_add_modules ide-cd
manual_add_modules sbp2
manual_add_modules ohci1394
# Casper helpers.
for helper in getty login new-uuid snapshot; do
ln -s /sbin/casper-${helper} ${DESTDIR}/bin
done
cp /usr/share/initramfs-tools/scripts/casper-functions $DESTDIR/scripts
cp /usr/share/initramfs-tools/scripts/casper-helpers $DESTDIR/scripts
auto_add_modules net
if [ -e /etc/casper.conf ]; then
mkdir -p ${DESTDIR}/etc
cp /etc/casper.conf ${DESTDIR}/etc
fi
if [ "$CASPER_GENERATE_UUID" ]; then
# Unique ID
mkdir -p $DESTDIR/conf
uuidgen -r > $DESTDIR/conf/uuid.conf
fi

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#!/bin/sh
# set -e
export PATH=/usr/bin:/usr/sbin:/bin:/sbin
mountpoint=/cdrom
LIVE_MEDIA_PATH=casper
root_persistence="casper-rw"
home_persistence="home-rw"
root_snapshot_label="casper-sn"
home_snapshot_label="home-sn"
USERNAME=casper
USERFULLNAME="Live session user"
HOST=live
BUILD_SYSTEM=Custom
mkdir -p $mountpoint
[ -f /etc/casper.conf ] && . /etc/casper.conf
export USERNAME USERFULLNAME HOST BUILD_SYSTEM
. /scripts/casper-helpers
if [ ! -f /casper.vars ]; then
touch /casper.vars
fi
parse_cmdline() {
for x in $(cat /proc/cmdline); do
case $x in
showmounts|show-cow)
export SHOWMOUNTS='Yes' ;;
persistent)
export PERSISTENT="Yes" ;;
nopersistent)
export PERSISTENT="" ;;
union=*)
export UNIONFS="${x#union=}";;
ip*)
STATICIP=${x#ip=}
if [ "${STATICIP}" = "" ]; then
STATICIP="frommedia"
fi
export STATICIP ;;
ignore_uuid)
IGNORE_UUID="Yes" ;;
live-media-path=*)
LIVE_MEDIA_PATH="${x#live-media-path=}"
export LIVE_MEDIA_PATH
echo "export LIVE_MEDIA_PATH=\"$LIVE_MEDIA_PATH\"" >> /etc/casper.conf ;;
esac
done
if [ "${UNIONFS}" = "" ]; then
export UNIONFS="aufs"
fi
}
is_casper_path() {
path=$1
if [ -d "$path/$LIVE_MEDIA_PATH" ]; then
if [ "$(echo $path/$LIVE_MEDIA_PATH/*.squashfs)" != "$path/$LIVE_MEDIA_PATH/*.squashfs" ] ||
[ "$(echo $path/$LIVE_MEDIA_PATH/*.ext2)" != "$path/$LIVE_MEDIA_PATH/*.ext2" ] ||
[ "$(echo $path/$LIVE_MEDIA_PATH/*.dir)" != "$path/$LIVE_MEDIA_PATH/*.dir" ]; then
return 0
fi
fi
return 1
}
matches_uuid() {
if [ "$IGNORE_UUID" ] || [ ! -e /conf/uuid.conf ]; then
return 0
fi
path="$1"
uuid="$(cat /conf/uuid.conf)"
for try_uuid_file in "$path/.disk/casper-uuid"*; do
[ -e "$try_uuid_file" ] || continue
try_uuid="$(cat "$try_uuid_file")"
if [ "$uuid" = "$try_uuid" ]; then
return 0
fi
done
return 1
}
get_backing_device() {
case "$1" in
*.squashfs|*.ext2)
echo $(setup_loop "$1" "loop" "/sys/block/loop*")
;;
*.dir)
echo "directory"
;;
*)
panic "Unrecognized casper filesystem: $1"
;;
esac
}
match_files_in_dir() {
# Does any files match pattern $1 ?
local pattern="$1"
if [ "$(echo $pattern)" != "$pattern" ]; then
return 0
fi
return 1
}
mount_images_in_directory() {
directory="$1"
rootmnt="$2"
if match_files_in_dir "$directory/$LIVE_MEDIA_PATH/*.squashfs" ||
match_files_in_dir "$directory/$LIVE_MEDIA_PATH/*.ext2" ||
match_files_in_dir "$directory/$LIVE_MEDIA_PATH/*.dir"; then
setup_unionfs "$directory/$LIVE_MEDIA_PATH" "$rootmnt"
else
:
fi
}
is_nice_device() {
sysfs_path="${1#/sys}"
if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-(ide|scsi|usb)|platform-mmc|platform-mxsdhci)"; then
return 0
fi
return 1
}
copy_live_to() {
copyfrom="${1}"
copytodev="${2}"
copyto="${copyfrom}_swap"
size=$(fs_size "" ${copyfrom} "used")
if [ "${copytodev}" = "ram" ]; then
# copying to ram:
freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
mount_options="-o size=${size}k"
free_string="memory"
fstype="tmpfs"
dev="/dev/shm"
else
# it should be a writable block device
if [ -b "${copytodev}" ]; then
dev="${copytodev}"
free_string="space"
fstype=$(get_fstype "${dev}")
freespace=$(fs_size "${dev}")
else
[ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
return 1
fi
fi
if [ "${freespace}" -lt "${size}" ] ; then
[ "$quiet" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k > ${size}k) to copy live media in ${copytodev}."
return 1
fi
# begin copying..
mkdir "${copyto}"
echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
umount ${copyfrom}
mount -r -o move ${copyto} ${copyfrom}
rmdir ${copyto}
return 0
}
do_netmount() {
rc=1
modprobe "${MP_QUIET}" af_packet # For DHCP
/sbin/udevadm trigger
/sbin/udevadm settle
ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf | tee /netboot.config
if [ "${NFSROOT}" = "auto" ]; then
NFSROOT=${ROOTSERVER}:${ROOTPATH}
fi
[ "$quiet" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then
rc=0
elif do_nfsmount ; then
NETBOOT="nfs"
export NETBOOT
rc=0
fi
[ "$quiet" != "y" ] && log_end_msg
return ${rc}
}
do_nfsmount() {
rc=1
modprobe "${MP_QUIET}" nfs
if [ -z "${NFSOPTS}" ]; then
NFSOPTS=""
fi
[ "$quiet" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
# FIXME: This while loop is an ugly HACK round an nfs bug
i=0
while [ "$i" -lt 60 ]; do
nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
sleep 1
i="$(($i + 1))"
done
return ${rc}
}
do_cifsmount() {
rc=1
if [ -x "/sbin/mount.cifs" ]; then
if [ -z "${NFSOPTS}" ]; then
CIFSOPTS="-ouser=root,password="
else
CIFSOPTS="${NFSOPTS}"
fi
[ "$quiet" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
modprobe "${MP_QUIET}" cifs
if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}" ; then
rc=0
fi
fi
return ${rc}
}
do_snap_copy ()
{
fromdev="${1}"
todir="${2}"
snap_type="${3}"
size=$(fs_size "${fromdev}" "" "used")
if [ -b "${fromdev}" ]; then
# look for free mem
if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]; then
todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
freespace=$(df -k | grep -s ${todev} | awk '{print $4}')
else
freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
fi
tomount="/mnt/tmpsnap"
if [ ! -d "${tomount}" ] ; then
mkdir -p "${tomount}"
fi
fstype=$(get_fstype "${fromdev}")
if [ -n "${fstype}" ]; then
# Copying stuff...
mount -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
cp -a "${tomount}"/* ${todir}
umount "${tomount}"
else
log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
fi
rmdir "${tomount}"
if echo ${fromdev} | grep -qs loop; then
losetup -d "${fromdev}"
fi
return 0
else
return 1
[ "$quiet" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
fi
}
try_snap ()
{
# Look for $snap_label.* in block devices and copy the contents to $snap_mount
# and remember the device and filename for resync on exit in casper.init
snap_label="${1}"
snap_mount="${2}"
snap_type="${3}"
snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2")
if [ ! -z "${snapdata}" ]; then
snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\)'; then
# squashfs or ext2 snapshot
dev=$(get_backing_device "${snapback}/${snapfile}")
if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"; then
log_warning_msg "Impossible to include the ${snapfile} Snapshot"
return 1
fi
else
# cpio.gz snapshot
# Unfortunately klibc's cpio is incompatible with the rest of
# the world; everything else requires -u -d, while klibc doesn't
# implement them. Try to detect whether it's in use.
cpiopath="$(which cpio)" || true
if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath"; then
cpioargs=
else
cpioargs='-u -d'
fi
if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i $cpioargs 2>/dev/null) ; then
log_warning_msg "Impossible to include the ${snapfile} Snapshot"
return 1
fi
fi
umount "${snapback}"
else
dev=$(find_cow_device "${snap_label}")
if [ -b ${dev} ]; then
if echo "${dev}" | grep -qs loop; then
# strange things happens, user confused?
snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
snapfile=$(basename ${snaploop})
snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
else
snapdev="${dev}"
fi
if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}" ; then
log_warning_msg "Impossible to include the ${snap_label} Snapshot"
return 1
else
if [ -n "${snapfile}" ]; then
# it was a loop device, user confused
umount ${snapdev}
fi
fi
else
log_warning_msg "Impossible to include the ${snap_label} Snapshot"
return 1
fi
fi
echo "export ${snap_type}SNAP="/cow${snap_mount#$rootmnt}":${snapdev}:${snapfile}" >> /etc/casper.conf # for resync on reboot/halt
return 0
}
setup_unionfs() {
image_directory="$1"
rootmnt="$2"
case ${UNIONFS} in
aufs|unionfs)
modprobe "${MP_QUIET}" -b ${UNIONFS} || true
if ! cut -f2 /proc/filesystems | grep -q "^${UNIONFS}\$" && \
[ -x /bin/unionfs-fuse ]; then
UNIONFS="unionfs-fuse"
fi
;;
esac
# run-init can't deal with images in a subdir, but we're going to
# move all of these away before it runs anyway. No, we're not,
# put them in / since move-mounting them into / breaks mono and
# some other apps.
croot="/"
# Let's just mount the read-only file systems first
rofsstring=""
rofslist=""
if [ "${NETBOOT}" = "nfs" ] ; then
roopt="nfsro" # work around a bug in nfs-unionfs locking
elif [ "${UNIONFS}" = "aufs" ]; then
roopt="rr"
elif [ "${UNIONFS}" = "unionfs-fuse" ]; then
roopt="RO"
else
roopt="ro"
fi
mkdir -p "${croot}"
for image_type in "ext2" "squashfs" "dir" ; do
for image in "${image_directory}"/*."${image_type}"; do
imagename=$(basename "${image}")
if [ -d "${image}" ]; then
# it is a plain directory: do nothing
rofsstring="${image}=${roopt}:${rofsstring}"
rofslist="${image} ${rofslist}"
elif [ -f "${image}" ]; then
backdev=$(get_backing_device "$image")
fstype=$(get_fstype "${backdev}")
if [ "${fstype}" = "unknown" ]; then
panic "Unknown file system type on ${backdev} (${image})"
fi
mkdir -p "${croot}/${imagename}"
mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
fi
done
done
rofsstring=${rofsstring%:}
mkdir -p /cow
cowdevice="tmpfs"
cow_fstype="tmpfs"
cow_mountopt="rw,noatime,mode=755"
# Looking for "${root_persistence}" device or file
if [ -n "${PERSISTENT}" ]; then
cowprobe=$(find_cow_device "${root_persistence}")
if [ -b "${cowprobe}" ]; then
cowdevice=${cowprobe}
cow_fstype=$(get_fstype "${cowprobe}")
cow_mountopt="rw,noatime"
else
[ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent medium"
fi
fi
mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || panic "Can not mount $cowdevice on /cow"
case ${UNIONFS} in
unionfs-fuse)
(ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:$rofsstring "$rootmnt" || panic "${UNIONFS} mount failed")
mkdir -p /dev/.initramfs/varrun
pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
;;
*)
mount -t ${UNIONFS} -o noatime,dirs=/cow=rw:$rofsstring ${UNIONFS} "$rootmnt" || panic "${UNIONFS} mount failed"
;;
esac
# Adding other custom mounts
if [ -n "${PERSISTENT}" ]; then
# directly mount /home
# FIXME: add a custom mounts configurable system
homecow=$(find_cow_device "${home_persistence}" )
if [ -b "${homecow}" ]; then
mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
else
[ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
fi
# Look for other snapshots to copy in
try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
fi
if [ -n "${SHOWMOUNTS}" ]; then
for d in ${rofslist}; do
mkdir -p "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
case d in
*.dir) # do nothing # mount -o bind "${d}" "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
;;
*)
if [ "${UNIONFS}" = unionfs-fuse ]; then
mount -o bind "${d}" "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
else
mount -o move "${d}" "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
fi
;;
esac
done
# shows cow fs on /cow for use by casper-snapshot
mkdir -p "${rootmnt}/cow"
mount -o bind /cow "${rootmnt}/cow"
fi
# XXX: hardcode the image name for now (xtraeme).
# move the first mount.
mkdir -p "${rootmnt}/rofs"
if [ "${UNIONFS}" = unionfs-fuse ]; then
mount -o bind /filesystem.squashfs "${rootmnt}/rofs"
else
mount -o move /filesystem.squashfs "${rootmnt}/rofs"
fi
}
check_dev ()
{
sysdev="${1}"
devname="${2}"
skip_uuid_check="${3}"
if [ -z "${devname}" ]; then
devname=$(sys2dev "${sysdev}")
fi
if [ -d "${devname}" ]; then
mount -o bind "${devname}" $mountpoint || continue
if is_casper_path $mountpoint; then
echo $mountpoint
return 0
else
umount $mountpoint
fi
fi
if [ -n "${LIVEMEDIA_OFFSET}" ]; then
loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVEMEDIA_OFFSET}")
devname="${loopdevname}"
fi
fstype=$(get_fstype "${devname}")
if is_supported_fs ${fstype}; then
mount -t ${fstype} -o ro,noatime "${devname}" $mountpoint || continue
if is_casper_path $mountpoint && \
([ "$skip_uuid_check" ] || matches_uuid $mountpoint); then
echo $mountpoint
return 0
else
umount $mountpoint
fi
fi
if [ -n "${LIVEMEDIA_OFFSET}" ]; then
losetup -d "${loopdevname}"
fi
return 1
}
find_livefs() {
timeout="${1}"
# first look at the one specified in the command line
if [ ! -z "${LIVEMEDIA}" ]; then
if check_dev "null" "${LIVEMEDIA}" "skip_uuid_check"; then
return 0
fi
fi
# don't start autodetection before timeout has expired
if [ -n "${LIVEMEDIA_TIMEOUT}" ]; then
if [ "${timeout}" -lt "${LIVEMEDIA_TIMEOUT}" ]; then
return 1
fi
fi
# or do the scan of block devices
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|fd)"); do
devname=$(sys2dev "${sysblock}")
fstype=$(get_fstype "${devname}")
if /lib/udev/cdrom_id ${devname} > /dev/null; then
if check_dev "null" "${devname}" ; then
return 0
fi
elif is_nice_device "${sysblock}" ; then
for dev in $(subdevices "${sysblock}"); do
if check_dev "${dev}" ; then
return 0
fi
done
elif [ "${fstype}" = "squashfs" -o \
"${fstype}" = "ext4" -o \
"${fstype}" = "ext3" -o \
"${fstype}" = "ext2" ]; then
# This is an ugly hack situation, the block device has
# an image directly on it. It's hopefully
# casper, so take it and run with it.
ln -s "${devname}" "${devname}.${fstype}"
echo "${devname}.${fstype}"
return 0
fi
done
return 1
}
set_usplash_timeout() {
if [ -x /sbin/usplash_write ]; then
/sbin/usplash_write "TIMEOUT 120"
fi
}
mountroot() {
exec 6>&1
exec 7>&2
exec > casper.log
exec 2>&1
tail -f casper.log >&7 &
tailpid="$!"
parse_cmdline
wait_for_udev 10
set_usplash_timeout
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
run_scripts /scripts/casper-premount
[ "$quiet" != "y" ] && log_end_msg
# Needed here too because some things (*cough* udev *cough*)
# changes the timeout
set_usplash_timeout
if [ ! -z "${NETBOOT}" ]; then
if do_netmount ; then
livefs_root="${mountpoint}"
else
panic "Unable to find a live file system on the network"
fi
else
# Scan local devices for the image
i=0
while [ "$i" -lt 60 ]; do
livefs_root=$(find_livefs $i)
if [ "${livefs_root}" ]; then
break
fi
sleep 1
i="$(($i + 1))"
done
fi
if [ -z "${livefs_root}" ]; then
panic "Unable to find a medium containing a live file system"
fi
if [ "${TORAM}" ]; then
live_dest="ram"
elif [ "${TODISK}" ]; then
live_dest="${TODISK}"
fi
if [ "${live_dest}" ]; then
log_begin_msg "Copying live_media to ${live_dest}"
copy_live_to "${livefs_root}" "${live_dest}"
log_end_msg
fi
mount_images_in_directory "${livefs_root}" "${rootmnt}"
log_end_msg
# unionfs-fuse needs /dev to be bind-mounted for the duration of
# casper-bottom; udev's init script will take care of things after that
if [ "${UNIONFS}" = unionfs-fuse ]; then
mount -n -o bind /dev "${rootmnt}/dev"
fi
maybe_break casper-bottom
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-bottom"
run_scripts /scripts/casper-bottom
[ "$quiet" != "y" ] && log_end_msg
if [ "${UNIONFS}" = unionfs-fuse ]; then
umount "${rootmnt}/dev"
fi
exec 1>&6 6>&-
exec 2>&7 7>&-
kill "$tailpid"
cp casper.log "${rootmnt}/var/log/"
if [ -f /etc/casper.conf ]; then
cp /etc/casper.conf "${rootmnt}/etc/"
fi
}

27
templates/xbps-casper/files/scripts/casper-bottom/05mountpoints Executable file
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#!/bin/sh
PREREQ=""
DESCRIPTION="Moving mount points..."
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
# Move to the new root filesystem so that programs there can get at it.
mkdir -p /root/cdrom
mount -n -o move /cdrom /root/cdrom
log_end_msg

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templates/xbps-casper/files/scripts/casper-bottom/10adduser Executable file
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#!/bin/sh
PREREQ=""
DESCRIPTION="Adding live session user..."
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
# U6aMy0wojraho is just a blank password
chroot /root useradd -c "$USERFULLNAME" -m $USERNAME -p U6aMy0wojraho
if [ -f /root/etc/sudoers ]; then
echo "${USERNAME} ALL=(ALL) NOPASSWD: ALL" >> /root/etc/sudoers
fi
log_end_msg

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templates/xbps-casper/files/scripts/casper-bottom/12fstab Executable file
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#!/bin/sh
PREREQ=""
DESCRIPTION="Configuring fstab..."
FSTAB=/root/etc/fstab
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
cat > $FSTAB <<EOF
${UNIONFS} / ${UNIONFS} rw 0 0
tmpfs /tmp tmpfs nosuid,nodev 0 0
EOF
log_end_msg

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templates/xbps-casper/files/scripts/casper-bottom/13swap Executable file
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#!/bin/sh
PREREQ=""
DESCRIPTION="Setting up swap..."
FSTAB=/root/etc/fstab
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
devices=""
for device in /dev/[hs]d[a-z][0-9]*; do
if ! [ -b "$device" ]; then
continue
fi
/sbin/blkid -o udev -p ${device%%[0-9]*} | grep -q "^ID_FS_USAGE=raid" && continue
magic=$(/bin/dd if="$device" bs=4086 skip=1 count=1 2>/dev/null | /bin/dd bs=10 count=1 2>/dev/null) || continue
if [ "$magic" = "SWAPSPACE2" -o "$magic" = "SWAP-SPACE" ]; then
# log "Found $device"
devices="$devices $device"
fi
done
for device in $devices; do
cat >> $FSTAB <<EOF
$device swap swap defaults 0 0
EOF
done
log_end_msg

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templates/xbps-casper/files/scripts/casper-bottom/14locales Executable file
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#! /bin/sh
PREREQ=""
DESCRIPTION="Setting up locales..."
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
# commandline
for x in $(cat /proc/cmdline); do
case $x in
locale=*)
locale=${x#locale=}
set_locale="true"
;;
esac
done
if [ "${set_locale}" ]; then
echo "LOCALE=$locale" > /root/etc/conf.d/locale
fi
log_end_msg

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templates/xbps-casper/files/scripts/casper-bottom/15autologin Executable file
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#!/bin/sh
PREREQ=""
DESCRIPTION="Setting up automatic login..."
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
log_end_msg

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templates/xbps-casper/files/scripts/casper-bottom/18hostname Executable file
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#! /bin/sh
PREREQ=""
DESCRIPTION="Setting hostname..."
. /scripts/casper-functions
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
log_begin_msg "$DESCRIPTION"
echo "hostname=$HOST" > /root/etc/conf.d/hostname
cat > /root/etc/hosts <<EOF
127.0.0.1 localhost
127.0.1.1 $HOST
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
EOF
log_end_msg

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. /scripts/functions
# Print a message and wait for enter
log_wait_msg()
{
if [ -x /sbin/usplash_write ]; then
/sbin/usplash_write "INPUTENTER $@"
read nunya < /dev/.initramfs/usplash_outfifo
fi
_log_msg "Waiting: $@ ..."
}

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## Casper helper functions, used by casper on boot and by casper-snapshot
MP_QUIET="-q"
if [ ! -x "/bin/fstype" ]; then
# klibc not in path -> not in initramfs
export PATH="${PATH}:/usr/lib/klibc/bin"
fi
sys2dev() {
sysdev=${1#/sys}
echo "/dev/$(/sbin/udevadm info -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
}
subdevices() {
sysblock=$1
r=""
for dev in "${sysblock}" "${sysblock}"/*; do
if [ -e "${dev}/dev" ]; then
r="${r} ${dev}"
fi
done
echo ${r}
}
is_supported_fs () {
# FIXME: do something better like the scan of supported filesystems
fstype="${1}"
case ${fstype} in
vfat|iso9660|udf|ext2|ext3|ext4|ntfs)
return 0
;;
esac
return 1
}
get_fstype() {
local FSTYPE
local FSSIZE
eval $(fstype < $1)
if [ "$FSTYPE" != "unknown" ]; then
echo $FSTYPE
return 0
fi
/sbin/blkid -s TYPE -o value $1 2>/dev/null
}
where_is_mounted() {
device=$1
if grep -q "^$device " /proc/mounts; then
mountpoint="$(grep "^$device " /proc/mounts | awk '{print $2; exit}')"
grep "^$device " /proc/mounts | read d mountpoint rest
echo $mountpoint
return 0
fi
return 1
}
lastline() {
while read lines ; do
line=${lines}
done
echo "${line}"
}
base_path ()
{
testpath="${1}"
mounts="$(awk '{print $2}' /proc/mounts)"
testpath="$(busybox realpath ${testpath})"
while true ; do
if echo "${mounts}" | grep -qs "^${testpath}" ; then
set -- `echo "${mounts}" | grep "^${testpath}" | lastline`
echo ${1}
break
else
testpath=`dirname $testpath`
fi
done
}
fs_size ()
{
# Returns used/free fs kbytes + 5% more
# You could pass a block device as $1 or the mount point as $2
dev="${1}"
mountp="${2}"
used="${3}"
if [ -z "${mountp}" ]; then
mountp=$(where_is_mounted "${dev}")
if [ "$?" -gt 0 ]; then
mountp="/mnt/tmp_fs_size"
mkdir -p "${mountp}"
mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}"
doumount=1
fi
fi
if [ "${used}" = "used" ]; then
size=$(du -ks ${mountp} | cut -f1)
size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
else
# free space
size="$(df -k | grep -s ${mountp} | awk '{print $4}')"
fi
if [ -n "${doumount}" ]; then
umount "${mountp}"
rmdir "${mountp}"
fi
echo "${size}"
}
setup_loop() {
local fspath=$1
local module=$2
local pattern=$3
local offset=$4
modprobe ${MP_QUIET} -b "$module"
/sbin/udevadm settle
if [ "$module" = loop ]; then
if [ ! -e /dev/loop0 ]; then
# temporary workaround for kernel bug
for i in 0 1 2 3 4 5 6 7; do
mknod "/dev/loop$i" b 7 "$i" || true
done
fi
dev="$(losetup -f)"
if [ "$dev" ]; then
if [ -n "$offset" ]; then
losetup -o "$offset" "$dev" "$fspath"
else
losetup "$dev" "$fspath"
fi
echo "$dev"
return 0
else
panic "No loop devices available"
fi
else
for loopdev in $pattern; do
if [ "$(cat $loopdev/size)" -eq 0 ]; then
dev=$(sys2dev "${loopdev}")
if [ -n "$offset" ]; then
losetup -o "$offset" "$dev" "$fspath"
else
losetup "$dev" "$fspath"
fi
echo "$dev"
return 0
fi
done
panic "No loop devices available"
fi
}
try_mount ()
{
dev="${1}"
mountp="${2}"
opts="${3}"
if where_is_mounted ${dev} > /dev/null; then
if [ "${opts}" != "ro" ]; then
mount -o remount,"${opts}" ${dev} $(where_is_mounted ${dev}) || panic "Remounting failed"
fi
mount -o bind $(where_is_mounted ${dev}) ${mountp} || panic "Cannot bind-mount"
else
mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
fi
}
find_cow_device() {
pers_label="${1}"
cow_backing="/${pers_label}-backing"
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
for dev in $(subdevices "${sysblock}"); do
devname=$(sys2dev "${dev}")
if [ "$(/sbin/blkid -s LABEL -o value $devname 2>/dev/null)" = "${pers_label}" ]; then
echo "$devname"
return
# Do not add any filesystem types here that might be able to
# mount a journalled filesystem and replay the journal. Doing so
# will cause data loss when a live CD is booted on a system
# where filesystems are in use by hibernated operating systems.
elif [ "$(get_fstype ${devname})" = "vfat" ]; then
mkdir -p "${cow_backing}"
try_mount "${devname}" "${cow_backing}" "rw"
if [ -e "${cow_backing}/${pers_label}" ]; then
echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
return 0
else
umount ${cow_backing}
fi
fi
done
done
}
find_files()
# return the first of $filenames found on vfat and ext2 devices
# FIXME: merge with above function
{
filenames="${1}"
snap_backing="/snap-backing"
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
for dev in $(subdevices "${sysblock}"); do
devname=$(sys2dev "${dev}")
devfstype="$(get_fstype ${devname})"
if [ "${devfstype}" = "vfat" ] || [ "${devfstype}" = "ext2" ] ; then # FIXME: all supported block devices should be scanned
mkdir -p "${snap_backing}"
try_mount "${devname}" "${snap_backing}" "ro"
for filename in ${filenames}; do
if [ -e "${snap_backing}/${filename}" ]; then
echo "${devname} ${snap_backing} ${filename}"
return 0
fi
done
umount ${snap_backing}
fi
done
done
}

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# Template file for 'xbps-casper'
pkgname=xbps-casper
version=0.1
build_style=custom-install
short_desc="Run a live preinstalled system from read-only media"
maintainer="Juan RP <xtraeme@gmail.com>"
checksum=b31983b27630b3ef99f68bd8382851a7963542c944b625bdbfd2f2ff301a02d3
long_desc="
$pkgname is a modified version of Ubuntu's casper, that is able
to run a live pre-installed system from read-only media."
noextract=yes
noarch=yes
conf_files="/etc/casper.conf"
Add_dependency full initramfs-tools
do_install()
{
# /etc config files
install -d ${DESTDIR}/etc
install -m 644 ${FILESDIR}/casper.conf ${DESTDIR}/etc
# Helpers
install -d ${DESTDIR}/sbin
install -m 755 ${FILESDIR}/bin/* ${DESTDIR}/sbin
# initramfs-tools hooks/scripts
initramfsdir=${DESTDIR}/usr/share/initramfs-tools
install -d ${initramfsdir}/hooks ${initramfsdir}/scripts/casper-bottom \
${initramfsdir}/conf.d
install -m 755 ${FILESDIR}/hooks/* ${initramfsdir}/hooks
install -m 755 ${FILESDIR}/scripts/casper-bottom/* \
${initramfsdir}/scripts/casper-bottom
install -m 644 ${FILESDIR}/scripts/casper* ${initramfsdir}/scripts
install -m 644 ${FILESDIR}/conf.d/* ${initramfsdir}/conf.d
}