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@pramodbiradar89
Created September 22, 2014 08:09
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usr/share/rear/lib/global-functions.sh
# global-functions.sh
#
# global functions for Relax-and-Recover
#
# Relax-and-Recover 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.
# Relax-and-Recover 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 Relax-and-Recover; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#
function read_and_strip_file () {
# extracts content from config files. In other words: strips the comments and new lines
if test -s "$1" ; then
sed -e '/^[[:space:]]/d;/^$/d;/^#/d' "$1"
fi
}
function is_numeric () {
# simple test if var is an integer
if expr $1 + 0 >/dev/null 2>&1 ; then
echo $1
else
echo 0
fi
}
######
### Functions for dealing with URLs
######
url_scheme() {
local url=$1
local scheme=${url%%://*}
# rsync scheme does not have to start with rsync:// it can also be scp style
echo $scheme | grep -q ":" && echo rsync || echo $scheme
}
url_host() {
local url=$1
local host=${url#*//}
echo ${host%%/*}
}
url_path() {
local url=$1
local path=${url#*//}
echo /${path#*/}
}
backup_path() {
local scheme=$1
local path=$2
case $scheme in
(tape) # no path for tape required
path=""
;;
(file) # type file needs a local path (must be mounted by user)
path="$path/${NETFS_PREFIX}"
;;
(iso)
if [[ "$WORKFLOW" = "recover" ]]; then
# The backup is located inside the ISO mount point when we do a recover
path="${BUILD_DIR}/outputfs${path}"
else
# The backup will be located on the ISO temporary dir
path="${TMP_DIR}/isofs${path}"
fi
;;
(*) # nfs, cifs, usb, a.o. need a temporary mount-path
path="${BUILD_DIR}/outputfs/${NETFS_PREFIX}"
;;
esac
echo "$path"
}
output_path() {
local scheme=$1
local path=$2
case $scheme in
(tape) # no path for tape required
path=""
;;
(file) # type file needs a local path (must be mounted by user)
path="$path/${OUTPUT_PREFIX}"
;;
(*) # nfs, cifs, usb, a.o. need a temporary mount-path
path="${BUILD_DIR}/outputfs/${OUTPUT_PREFIX}"
;;
esac
echo "$path"
}
### Mount URL $1 at mountpoint $2[, with options $3]
mount_url() {
local url=$1
local mountpoint=$2
local defaultoptions="rw,noatime,nolock"
local options=${3:-"$defaultoptions"}
### Generate a mount command
local mount_cmd
case $(url_scheme $url) in
(tape|file|rsync|fish|ftp|ftps|hftp|http|https|sftp)
### Don't need to mount anything for these
return 0
;;
(iso)
if [[ "$WORKFLOW" = "recover" ]]; then
mount_cmd="mount /dev/disk/by-label/${ISO_VOLID} $mountpoint"
else
return 0
fi
;;
(var)
### The mount command is given by variable in the url host
local var=$(url_host $url)
mount_cmd="${!var} $mountpoint"
;;
(cifs)
if [ x"$options" = x"$defaultoptions" ];then
mount_cmd="mount $v -o $options,guest //$(url_host $url)$(url_path $url) $mountpoint"
else
mount_cmd="mount $v -o $options //$(url_host $url)$(url_path $url) $mountpoint"
fi
;;
(usb)
mount_cmd="mount $v -o $options $(url_path $url) $mountpoint"
;;
(sshfs)
mount_cmd="sshfs $(url_host $url):$(url_path $url) $mountpoint -o $options"
;;
(davfs)
mount_cmd="mount $v -t davfs http://$(url_host $url)$(url_path $url) $mountpoint"
;;
(*)
mount_cmd="mount $v -t $(url_scheme $url) -o $options $(url_host $url):$(url_path $url) $mountpoint"
;;
esac
Log "Mounting with '$mount_cmd'"
$mount_cmd >&2
StopIfError "Mount command '$mount_cmd' failed."
AddExitTask "umount -f $v '$mountpoint' >&2"
return 0
}
### Unmount url $1 at mountpoint $2
umount_url() {
local url=$1
local mountpoint=$2
case $(url_scheme $url) in
(tape|file|rsync|fish|ftp|ftps|hftp|http|https|sftp)
### Don't need to umount anything for these
return 0
;;
(iso)
if [[ "$WORKFLOW" != "recover" ]]; then
return 0
fi
;;
(sshfs)
umount_cmd="fusermount -u $mountpoint"
;;
(davfs)
umount_cmd="umount $mountpoint"
# Wait for 3 sek. then remove the cache-dir /var/cache/davfs
sleep 30
# ToDo: put in here the cache-dir from /etc/davfs2/davfs.conf
# and delete only the just used cache
#rm -rf /var/cache/davfs2/*<mountpoint-hash>*
rm -rf /var/cache/davfs2/*outputfs*
;;
(var)
local var=$(url_host $url)
umount_cmd="${!var} $mountpoint"
Log "Unmounting with '$umount_cmd'"
$umount_cmd
StopIfError "Unmounting failed."
RemoveExitTask "umount -f $v '$mountpoint' >&2"
return 0
;;
esac
umount_mountpoint $mountpoint
StopIfError "Unmounting '$mountpoint' failed."
RemoveExitTask "umount -f $v '$mountpoint' >&2"
return 0
}
### Unmount mountpoint $1
umount_mountpoint() {
local mountpoint=$1
### First, try a normal unmount,
Log "Unmounting '$mountpoint'"
umount $v $mountpoint >&2
if [[ $? -eq 0 ]] ; then
return 0
fi
### otherwise, try to kill all processes that opened files on the mount.
# TODO: actually implement this
### If that still fails, force unmount.
Log "Forced unmount of '$mountpoint'"
umount $v -f $mountpoint >&2
if [[ $? -eq 0 ]] ; then
return 0
fi
Log "Unmounting '$mountpoint' failed."
return 1
}
# global-functions.sh
#
# global functions for Relax-and-Recover
#
# Relax-and-Recover 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.
# Relax-and-Recover 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 Relax-and-Recover; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#
function read_and_strip_file () {
# extracts content from config files. In other words: strips the comments and new lines
if test -s "$1" ; then
sed -e '/^[[:space:]]/d;/^$/d;/^#/d' "$1"
fi
}
function is_numeric () {
# simple test if var is an integer
if expr $1 + 0 >/dev/null 2>&1 ; then
echo $1
else
echo 0
fi
}
######
### Functions for dealing with URLs
######
url_scheme() {
local url=$1
local scheme=${url%%://*}
# rsync scheme does not have to start with rsync:// it can also be scp style
echo $scheme | grep -q ":" && echo rsync || echo $scheme
}
url_host() {
local url=$1
local host=${url#*//}
echo ${host%%/*}
}
url_path() {
local url=$1
local path=${url#*//}
echo /${path#*/}
}
backup_path() {
local scheme=$1
local path=$2
case $scheme in
(tape) # no path for tape required
path=""
;;
(file) # type file needs a local path (must be mounted by user)
path="$path/${NETFS_PREFIX}"
;;
(iso)
if [[ "$WORKFLOW" = "recover" ]]; then
# The backup is located inside the ISO mount point when we do a recover
path="${BUILD_DIR}/outputfs${path}"
else
# The backup will be located on the ISO temporary dir
path="${TMP_DIR}/isofs${path}"
fi
;;
(*) # nfs, cifs, usb, a.o. need a temporary mount-path
path="${BUILD_DIR}/outputfs/${NETFS_PREFIX}"
;;
esac
echo "$path"
}
output_path() {
local scheme=$1
local path=$2
case $scheme in
(tape) # no path for tape required
path=""
;;
(file) # type file needs a local path (must be mounted by user)
path="$path/${OUTPUT_PREFIX}"
;;
(*) # nfs, cifs, usb, a.o. need a temporary mount-path
path="${BUILD_DIR}/outputfs/${OUTPUT_PREFIX}"
;;
esac
echo "$path"
}
### Mount URL $1 at mountpoint $2[, with options $3]
mount_url() {
local url=$1
local mountpoint=$2
local defaultoptions="rw,noatime"
local options=${3:-"$defaultoptions"}
### Generate a mount command
local mount_cmd
case $(url_scheme $url) in
(tape|file|rsync|fish|ftp|ftps|hftp|http|https|sftp)
### Don't need to mount anything for these
return 0
;;
(iso)
if [[ "$WORKFLOW" = "recover" ]]; then
mount_cmd="mount /dev/disk/by-label/${ISO_VOLID} $mountpoint"
else
return 0
fi
;;
(var)
### The mount command is given by variable in the url host
local var=$(url_host $url)
mount_cmd="${!var} $mountpoint"
;;
(cifs)
if [ x"$options" = x"$defaultoptions" ];then
mount_cmd="mount $v -o $options,guest //$(url_host $url)$(url_path $url) $mountpoint"
else
mount_cmd="mount $v -o $options //$(url_host $url)$(url_path $url) $mountpoint"
fi
;;
(usb)
mount_cmd="mount $v -o $options $(url_path $url) $mountpoint"
;;
(sshfs)
mount_cmd="sshfs $(url_host $url):$(url_path $url) $mountpoint -o $options"
;;
(davfs)
mount_cmd="mount $v -t davfs http://$(url_host $url)$(url_path $url) $mountpoint"
;;
(*)
mount_cmd="mount $v -t $(url_scheme $url) -o $options $(url_host $url):$(url_path $url) $mountpoint"
;;
esac
Log "Mounting with '$mount_cmd'"
$mount_cmd >&2
StopIfError "Mount command '$mount_cmd' failed."
AddExitTask "umount -f $v '$mountpoint' >&2"
return 0
}
### Unmount url $1 at mountpoint $2
umount_url() {
local url=$1
local mountpoint=$2
case $(url_scheme $url) in
(tape|file|rsync|fish|ftp|ftps|hftp|http|https|sftp)
### Don't need to umount anything for these
return 0
;;
(iso)
if [[ "$WORKFLOW" != "recover" ]]; then
return 0
fi
;;
(sshfs)
umount_cmd="fusermount -u $mountpoint"
;;
(davfs)
umount_cmd="umount $mountpoint"
# Wait for 3 sek. then remove the cache-dir /var/cache/davfs
sleep 30
# ToDo: put in here the cache-dir from /etc/davfs2/davfs.conf
# and delete only the just used cache
#rm -rf /var/cache/davfs2/*<mountpoint-hash>*
rm -rf /var/cache/davfs2/*outputfs*
;;
(var)
local var=$(url_host $url)
umount_cmd="${!var} $mountpoint"
Log "Unmounting with '$umount_cmd'"
$umount_cmd
StopIfError "Unmounting failed."
RemoveExitTask "umount -f $v '$mountpoint' >&2"
return 0
;;
esac
umount_mountpoint $mountpoint
StopIfError "Unmounting '$mountpoint' failed."
RemoveExitTask "umount -f $v '$mountpoint' >&2"
return 0
}
### Unmount mountpoint $1
umount_mountpoint() {
local mountpoint=$1
### First, try a normal unmount,
Log "Unmounting '$mountpoint'"
umount $v $mountpoint >&2
if [[ $? -eq 0 ]] ; then
return 0
fi
### otherwise, try to kill all processes that opened files on the mount.
# TODO: actually implement this
### If that still fails, force unmount.
Log "Forced unmount of '$mountpoint'"
umount $v -f $mountpoint >&2
if [[ $? -eq 0 ]] ; then
return 0
fi
Log "Unmounting '$mountpoint' failed."
return 1
}
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