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# This script finalize/GNU/Linux/320_migrate_network_configuration_files.sh
# rewrites some network configuration files (cf. network_configuration_files below)
# (currently for Red Hat, SUSE, Debian, Ubuntu)
# as specified in the mapping files
# /etc/rear/mappings/mac
# /etc/rear/mappings/ip_addresses
# /etc/rear/mappings/routes
# in the currently running ReaR recovery system.
# In particular /etc/rear/mappings/mac gets automatically created during recovery system startup
# via [usr/share/rear/skel/default]/etc/scripts/system-setup.d/55-migrate-network-devices.sh
# if the original interface MAC is not found in the currently running recovery system
# so rewriting of MAC addresses happens usually automatically on replacement hardware.
# For the mapping files syntax see
# doc/mappings/mac.example
# doc/mappings/routes.example
# doc/mappings/ip_addresses.example
local restored_file network_config_file
local network_config_files=()
local mapping_file_name mapping_file_interface_field mapping_file_content
local sed_script sed_script_reason
local old_mac new_mac interface junk
local new_interface
local current_mac
local new_ip_cidr new_ip new_cidr new_netmask
local ifcfg_file multiple_addresses_keyword
local network_interfaces_file linearized_network_interfaces_file
local routing_config_file destination gateway
# All finalize scripts that patch restored files within TARGET_FS_ROOT
# should do the same directory and file and symlink handling which means:
# 0. Skip patching non-regular files like directories, device nodes, or files that do not exist
# When the regular file is a symlink:
# 1. Try to patch the symlink target when the regular file is a symlink
# 2. Skip patching if the symlink target contains /proc/ /sys/ /dev/ or /run/
# 3. Skip patching symlink targets that are non-regular files like directories, device nodes, or files that do not exist
# 4. Skip patching dead symlinks
# See the symlink handling code in finalize/GNU/Linux/280_migrate_uuid_tags.sh and other such files,
# cf. https://github.com/rear/rear/pull/2055 and https://github.com/rear/rear/issues/1338
# The restored file argument $1 must be provided as an absolute path in the recovery system
# i.e. as $TARGET_FS_ROOT/path/to/restored_file (usually /mnt/local/path/to/restored_file).
# The valid_restored_file_for_patching function returns 0 and outputs on stdout
# the absolute path in the recovery system of the file that should be used for patching
# when the restored file is a valid regular file or a symlink with a valid symlink target
# otherwise the valid_restored_file_for_patching function returns 1 and outputs nothing:
function valid_restored_file_for_patching () {
local restored_file="$1"
local symlink_target
# Silently skip non-regular files like directories, device nodes, or file not found:
test -f "$restored_file" || return 1
if ! test -L "$restored_file" ; then
# No symlink but a normal existing regular file:
Log "Patching $restored_file"
echo -n "$restored_file"
return 0
fi
# Symlink handling:
# 'sed -i' bails out on symlinks so we patch the symlink target if it exists within TARGET_FS_ROOT.
# TODO: We may do this inside 'chroot $TARGET_FS_ROOT' so that absolute symlinks will work correctly
# cf. https://github.com/rear/rear/issues/1338
# Currently we prepend absolute symlink targets with $TARGET_FS_ROOT and try to use that instead.
# Get the symlink target regardless of which of its components exist:
if ! symlink_target="$( readlink -m "$restored_file" )" ; then
# Skip when readlink cannot resolve the symlink:
Log "Skip patching symlink $restored_file (readlink could not resolve it)"
return 1
fi
# symlink_target is an absolute path in the recovery system
# e.g. the symlink target of etc/mtab is /mnt/local/proc/12345/mounts
# If the symlink target does not start with /mnt/local/ (i.e. if it does not start with $TARGET_FS_ROOT)
# it is an absolute symlink (i.e. inside $TARGET_FS_ROOT a symlink points to /absolute/path/file)
# and the target of an absolute symlink is not within the recreated system but in the recovery system
# where it does not make sense to patch files, cf. https://github.com/rear/rear/issues/1338
# so that we prepend $TARGET_FS_ROOT to get the symlink target as absolute path in the recovery system
# (e.g. /absolute/path/file becomes $TARGET_FS_ROOT/absolute/path/file):
if ! echo $symlink_target | grep -q "^$TARGET_FS_ROOT/" ; then
Log "Symlink $restored_file target $symlink_target not within $TARGET_FS_ROOT trying $TARGET_FS_ROOT/$symlink_target instead"
symlink_target="$TARGET_FS_ROOT/$symlink_target"
fi
# If the symlink target contains /proc/ /sys/ /dev/ or /run/ we skip it because then
# the symlink target is considered to not be a restored file that needs to be patched
# cf. https://github.com/rear/rear/pull/2047#issuecomment-464846777
if echo $symlink_target | grep -Eq '/proc/|/sys/|/dev/|/run/' ; then
Log "Skip patching symlink $restored_file target $symlink_target on /proc/ /sys/ /dev/ or /run/"
return 1
fi
# Skip symlink targets that are non-regular files like directories, device nodes, or file not found (i.e. dead symlinks):
if ! test -f "$symlink_target" ; then
Log "Skip patching symlink $restored_file target $symlink_target is not a regular file"
return 1
fi
# Patch symlink targets that are regular files within TARGET_FS_ROOT:
Log "Patching symlink $restored_file target $symlink_target"
echo -n "$symlink_target"
return 0
}
# Because the bash option nullglob is set in rear (see usr/sbin/rear) restored_file is empty if nothing matches
# $TARGET_FS_ROOT/etc/sysconfig/*/ifcfg-* or $TARGET_FS_ROOT/etc/network/inter[f]aces or $TARGET_FS_ROOT/etc/network/interfaces.d/*
# and $TARGET_FS_ROOT/etc/network/inter[f]aces is a special trick to only add $TARGET_FS_ROOT/etc/network/interfaces if it exists.
# FIXME: The following code fails if file names contain characters from IFS (e.g. blanks),
# see https://github.com/rear/rear/pull/1514#discussion_r141031975
# and for the general issue see https://github.com/rear/rear/issues/1372
for restored_file in $TARGET_FS_ROOT/etc/sysconfig/*/ifcfg-* $TARGET_FS_ROOT/etc/network/inter[f]aces $TARGET_FS_ROOT/etc/network/interfaces.d/* $TARGET_FS_ROOT/etc/NetworkManager/system-connections/*.nmconnection ; do
network_config_file="$( valid_restored_file_for_patching "$restored_file" )" || continue
network_config_files+=( "$network_config_file" )
done
# Skip if no valid restored network configuration files are found
test ${#network_config_files[@]} -gt 0 || return 0
# Create a temporary directory for plain mapping files content without comments and empty lines.
# Do not error out at this late state of "rear recover" (after the backup was restored) but inform the user:
if ! mkdir $v -p $TMP_DIR/mappings ; then
LogPrintError "Cannot migrate network configuration files according to the mapping files (could not create $TMP_DIR/mappings)"
return 1
fi
# Strip all comments and empty lines from the mapping files and have plain mapping files content in the temporary directory.
# The plain mapping files content without comments or empty lines is needed to cleanly create the sed scripts below.
# Furthermore the lines in the mapping files must be sorted by the network interface field because later
# the lines of two mapping files are combined via 'join' on the common field interface:
for mapping_file_name in mac ip_addresses routes ; do
case "$mapping_file_name" in
(mac)
# The network interface is the 3rd field in mappings/mac
mapping_file_interface_field=3
;;
(ip_addresses)
# The network interface is the 1st field in mappings/ip_addresses
mapping_file_interface_field=1
;;
(routes)
# The network interface is the 3rd field in mappings/routes
mapping_file_interface_field=3
;;
(*)
BugError "Unsupported mapping file name '$mapping_file_name' used in ${BASH_SOURCE[0]}"
;;
esac
read_and_strip_file $CONFIG_DIR/mappings/$mapping_file_name | sort -b -k $mapping_file_interface_field >$TMP_DIR/mappings/$mapping_file_name
done
# Skip if there is not any mapping file content:
mapping_file_content="no"
for mapping_file_name in mac ip_addresses routes ; do
test -s $TMP_DIR/mappings/$mapping_file_name && mapping_file_content="yes"
done
is_true $mapping_file_content || return 0
LogPrint "Migrating restored network configuration files according to the mapping files ..."
# Change MAC addresses and network interfaces in network configuration files when there is content in .../mappings/mac:
if test -s $TMP_DIR/mappings/mac ; then
Log "Rewriting changed MAC addresses and network interfaces"
# Create sed script:
sed_script=""
sed_script_reason="setting new MAC addresses and network interfaces"
while read old_mac new_mac interface junk ; do
test "$old_mac" -a "$new_mac" -a "$old_mac" != "$new_mac" && sed_script+=" ; s/$old_mac/$new_mac/g"
# Get new interface from the MAC address in case of inet renaming:
new_interface=$( get_device_by_hwaddr "$new_mac" )
test "$interface" -a "$new_interface" -a "$interface" != "$new_interface" && sed_script+=" ; s/$interface/$new_interface/g"
# The "sed -e 'p ; y/abcdef/ABCDEF/'" hack prints each line as is and once again with upper case hex letters.
# The reason is that .../mappings/mac has lower case hex letters (cf. doc/mappings/mac.example)
# but some systems seem to have MAC addresses with upper case hex letters in the config files.
# We do not want to mess around with that so we do each replacement two times both case-sensitive
# one with lower case hex letters and the other one with upper case hex letters in the sed script:
done < <( sed -e 'p ; y/abcdef/ABCDEF/' $TMP_DIR/mappings/mac )
# Apply the sed script to the network configuration files:
if test "$sed_script" ; then
Debug "sed_script for $sed_script_reason: '$sed_script'"
for network_config_file in "${network_config_files[@]}" ; do
# The network_config_files array contains only existing files (cf. above how it is set).
if sed -i -e "$sed_script" "$network_config_file" ; then
Log "Wrote new MAC addresses and network interfaces in '$network_config_file'"
else
LogPrintError "Failed to rewrite MAC addresses and network interfaces in '$network_config_file'"
fi
done
else
Log "No rewriting of MAC addresses and network interfaces (empty sed_script)"
fi
# Rename network configuration files where the file name contains the MAC address or the interface name:
for network_config_file in "${network_config_files[@]}" ; do
# E.g. when the interface has changed from eth0 to eth1 the sed_script contains "... ; s/eth0/eth1/g" (cf. "Get new interface" above)
# so when this sed_script is applied to a network configuration file name like $TARGET_FS_ROOT/etc/sysconfig/network/ifcfg-eth0
# the new_file_name becomes $TARGET_FS_ROOT/etc/sysconfig/network/ifcfg-eth1
new_file_name="$( sed -e "$sed_script" <<<"$network_config_file" )"
if test "$new_file_name" -a "$network_config_file" != "$new_file_name" ; then
Log "Renaming '$network_config_file' as '$new_file_name'"
mv $v "$network_config_file" "$new_file_name" || LogPrintError "Failed to rename '$network_config_file' as '$new_file_name'"
fi
done
else
# When .../mappings/ip_addresses or .../mappings/routes exists but .../mappings/mac is missing or has no content
# we need a .../mappings/mac file because otherwise the logic to rewrite IP addresses or routes would fail.
# We try to generate one from .../mappings/ip_addresses with old_mac=new_mac for non-migrated interfaces:
if test -s $TMP_DIR/mappings/ip_addresses ; then
for interface in $( cut -f 1 -d " " $TMP_DIR/mappings/ip_addresses ) ; do
# /sys/class/net/$interface/address contains the MAC address with lower case hex letters (cf. above):
current_mac=$( cat /sys/class/net/$interface/address )
echo "$current_mac $current_mac $interface" >> $TMP_DIR/mappings/mac
done
# Verify we could generate a fallback $TMP_DIR/mappings/mac file with actual content (i.e. non-empty):
if test -s $TMP_DIR/mappings/mac ; then
Log "Using generated fallback $TMP_DIR/mappings/mac file (/etc/rear/mappings/mac is missing or has no content)"
else
# Do not error out at this late state of "rear recover" (after the backup was restored) but inform the user:
LogPrintError "Cannot migrate network configuration files (/etc/rear/mappings/ip_addresses exits but /etc/rear/mappings/mac is missing or has no content)"
return 1
fi
else
# When .../mappings/routes exists but neither .../mappings/mac nor .../mappings/ip_addresses exist or neither have content we give up:
if test -s $TMP_DIR/mappings/routes ; then
# Do not error out at this late state of "rear recover" (after the backup was restored) but inform the user:
LogPrintError "Cannot migrate network configuration files (/etc/rear/mappings/routes exits but /etc/rear/mappings/mac is missing or has no content)"
return 1
fi
fi
fi
# Change IP addresses and CIDR or netmask in network configuration files when there is content in .../mappings/ip_addresses:
if test -s $TMP_DIR/mappings/ip_addresses ; then
Log "Changing IP addresses and CIDR or netmask in network configuration files"
# mappings/mac is e.g. (old-MAC-address new-MAC-address interface):
# 00:11:85:c2:b8:d5 00:50:56:b3:75:ad eth0
# 00:11:85:c2:b8:d7 00:50:56:b3:08:8c eth2
# 00:11:85:c2:b8:d9 00:50:56:b3:08:8e eth3
# and mappings/ip_addresses is e.g. (interface IP-address/CIDR or 'dhcp'):
# eth0 192.168.100.101/24
# eth1 172.16.200.202/16
# eth2 dhcp
# so that "join -1 3 -2 1 mappings/mac mappings/ip_addresses" results (interface old-MAC-address new-MAC-address IP-address/CIDR or 'dhcp'):
# eth0 00:11:85:c2:b8:d5 00:50:56:b3:75:ad 192.168.100.101/24
# eth2 00:11:85:c2:b8:d7 00:50:56:b3:08:8c dhcp
# Keep the join result in a file to make debugging easier in the recovery system after "rear recover":
join -1 3 -2 1 $TMP_DIR/mappings/mac $TMP_DIR/mappings/ip_addresses > $TMP_DIR/mappings/join_mac_ip_addresses
# Read $TMP_DIR/mappings/join_mac_ip_addresses contents:
while read interface old_mac new_mac new_ip_cidr junk ; do
# No interface value means no input at all (i.e. an empty line) that can be silently skipped:
test "$interface" || continue
# No new IP-address/CIDR value indicates an issue, so tell the user about it:
if ! test "$new_ip_cidr" ; then
LogPrintError "Cannot migrate network configuration for '$interface' (no new IP-address/CIDR value)"
continue
fi
# No old-MAC-address or new-MAC-address value indicates an issue, so tell the user about it:
if ! test "$old_mac" -a "$new_mac" ; then
LogPrintError "Cannot migrate network configuration for '$interface' (no old or new MAC-address value)"
continue
fi
# FIXME: Currently I <jsmeix@suse.de> do not know what to do in case of new_ip_cidr="dhcp"
# so I skip this case verbosely so that the user is at least informed:
if test "dhcp" = "$new_ip_cidr" ; then
LogPrintError "Skipped migrating network configuration for '$interface' (special new IP-address/CIDR value 'dhcp')"
continue
fi
# Log what will be done to make debugging easier:
Log "Migrating network configuration for '$interface' '$old_mac' '$new_mac' '$new_ip_cidr' (interface old-MAC-address new-MAC-address IP-address/CIDR)"
# Only the IP-address part of IP-address/CIDR:
new_ip="${new_ip_cidr%%/*}"
# Only the CIDR part of IP-address/CIDR:
new_cidr=${new_ip_cidr#*/}
# RHEL 4, 5,... cannot handle IPADDR="x.x.x.x/cidr" in ifcfg configuration files
# but only plain IPADDR="x.x.x.x" plus a separated NETMASK="y.y.y.y" entry
# so we convert the CIDR to a netmask (e.g. "24" -> "255.255.255.0").
# See the prefix2netmask function in lib/network-functions.sh
# e.g. "prefix2netmask 24" results "255.255.255.0":
new_netmask=$( prefix2netmask $new_cidr )
# If prefix2netmask results no real netmask use an empty fallback value:
test "0.0.0.0" = "$new_netmask" && new_netmask=""
# Now we have for example for the following input (cf. the example above)
# eth0 00:11:85:c2:b8:d5 00:50:56:b3:75:ad 192.168.100.101/24
# those variables set:
# $interface="eth0"
# $old_mac="00:11:85:c2:b8:d5"
# $new_mac="00:50:56:b3:75:ad"
# $new_ip_cidr="192.168.100.101/24"
# $new_ip=192.168.100.101"
# $new_cidr="24"
# $new_netmask="255.255.255.0"
# Handle Fedora and SUSE network configuration files (with sysconfig ifcfg configuration files).
# Because the bash option nullglob is set in rear (see usr/sbin/rear) nothing is done if no file matches.
# FIXME: The following code fails if file names contain characters from IFS (e.g. blanks),
# see https://github.com/rear/rear/pull/1514#discussion_r141031975
# and for the general issue see https://github.com/rear/rear/issues/1372
for restored_file in $TARGET_FS_ROOT/etc/sysconfig/*/ifcfg-*$new_mac* $TARGET_FS_ROOT/etc/sysconfig/*/ifcfg-*$interface* ; do
ifcfg_file="$( valid_restored_file_for_patching "$restored_file" )" || continue
sed_script=""
sed_script_reason=""
# On a SLES15-like openSUSE Leap 15.0 system /etc/sysconfig/network/ifcfg.template shows in particular
# If using a static configuration you have to set an IP address and a netmask
# or prefix length. The following examples are equivalent:
# 1) IPADDR=192.168.1.1/24 # NETMASK and PREFIXLEN will be ignored
# 2) IPADDR=192.168.1.1
# PREFIXLEN=24 # NETMASK will be ignored
# 3) IPADDR=192.168.1.1
# NETMASK=255.255.255.0
# so we need to adapt the ifcfg configuration file depending on what kind of syntax there is currently used
# because this script works on the user's restored files of his target system in /mnt/local
# so what it does must match what there is on the user's target system.
# An IPv6 address consists of hexadecimal numbers '0-9A-Fa-f' plus ':' separators
# like '1080::8:800:200C:417A' where '::' is the shortest possible IPv6 address,
# cf. "Current formats" in https://tools.ietf.org/html/rfc1924
# so ':' can be the first (and only) character in an IPv6 address.
# In ifcfg configuration files the value can be in single quotes like KEYWORD='VALUE':
if grep -q "^IPADDR=[':0-9A-Fa-f][.:0-9A-Fa-f]*/[0-9'][0-9']*" $ifcfg_file ; then
# Case 1) where the syntax is like IPADDR=192.168.1.1/24 or IPADDR='192.168.1.1/24'
# replace the old IPADDR value with the new_ip_cidr value (always in the IPADDR='...' form) and
# set NETMASK and PREFIXLEN empty (to remove useless old values that may not match the new_ip_cidr value).
# The usual sed 's/regexp/replacement/flags' command delimiter character / is replaced by # here because
# the delimiter character must not appear in regexp or replacement but e.g. 192.168.1.1/24 contains it:
sed_script+=" ; s#^IPADDR=.*#IPADDR='$new_ip_cidr'#g ; s#^NETMASK=.*#NETMASK=''#g ; s#^PREFIXLEN=.*#PREFIXLEN=''#g"
sed_script_reason="setting new IP-address/CIDR"
else # Case 2) plain IPADDR plus PREFIXLEN or case 3) plain IPADDR plus NETMASK:
if grep -q "^IPADDR=[':0-9A-Fa-f][.:0-9A-Fa-f']*" $ifcfg_file ; then
# Plain IPADDR like IPADDR=192.168.1.1 or IPADDR='1080::8:800:200C:417A' found
# (the IPADDR with CIDR case like IPADDR='192.168.1.1/24' was found above).
# Replace the old plain IPADDR value with the new_ip value (always in the IPADDR='...' form):
# set NETMASK and PREFIXLEN empty (to remove useless old values that may not match the new_ip value):
sed_script+=" ; s#^IPADDR=.*#IPADDR='$new_ip'#g ; s#^NETMASK=.*#NETMASK=''#g ; s#^PREFIXLEN=.*#PREFIXLEN=''#g"
if grep -q "^PREFIXLEN=['0-9][0-9']*" $ifcfg_file ; then
# Case 2) plain IPADDR plus PREFIXLEN like PREFIXLEN=24 found.
# Replace the old PREFIXLEN value with the new_cidr value (always in the PREFIXLEN='...' form)
# and set NETMASK empty (to remove a useless old value that may not match the new_cidr value):
sed_script+=" ; s#^PREFIXLEN=.*#PREFIXLEN='$new_cidr'#g ; s#^NETMASK=.*#NETMASK=''#g"
sed_script_reason="setting new IP-address plus PREFIXLEN"
else
# Case 3) plain IPADDR plus NETMASK:
if grep -q "^NETMASK=['0-9][.0-9']*" $ifcfg_file ; then
# NETMASK like NETMASK=255.255.255.0 found:
# Replace the old NETMASK value with the new_netmask value (always in the NETMASK='...' form)
# and set PREFIXLEN empty (to remove a useless old value that may not match the new_netmask value):
sed_script+=" ; s#^NETMASK=.*#NETMASK='$new_netmask'#g ; s#^PREFIXLEN=.*#PREFIXLEN=''#g"
sed_script_reason="setting new IP-address plus NETMASK"
else
# Neither PREFIXLEN nor NETMASK:
LogPrintError "Cannot set netmask or prefix length for new IP-address '$new_ip' (neither PREFIXLEN nor NETMASK in $ifcfg_file)"
# Do not 'continue' with the next ifcfg_file because the plain new_ip can be set o it is set without netmask or prefix length.
fi
fi
else
# Neither IPADDR with CIDR nor plain IPADDR:
LogPrintError "Cannot set new IP-address '$new_ip' (no IPADDR in $ifcfg_file)"
continue
fi
fi
# Set NETWORK and BROADCAST empty (to remove possibly useless old values that may not match the values):
sed_script+=" ; s#^NETWORK=.*#NETWORK=''#g ; s#^BROADCAST=.*#BROADCAST=''#g"
# Set BOOTPROTO and STARTMODE to default/fallback values (for STARTMODE 'manual' or 'off' or 'onboot'):
sed_script+=" ; s#^BOOTPROTO=.*#BOOTPROTO='static'#g ; s#STARTMODE='*\(manual\|off\|onboot\).*#STARTMODE='auto'#g "
# Delete entries for
# IPADDR_suffix BROADCAST_suffix NETMASK_suffix PREFIXLEN_suffix REMOTE_IPADDR_suffix LABEL_suffix SCOPE_suffix IP_OPTIONS_suffix
# cf. "Multiple addresses" in "man 5 ifcfg":
for multiple_addresses_keyword in IPADDR_ BROADCAST_ NETMASK_ PREFIXLEN_ REMOTE_IPADDR_ LABEL_ SCOPE_ IP_OPTIONS_ ; do
sed_script+=" ; /^$multiple_addresses_keyword/d"
done
# Apply the sed script to the ifcfg_file:
if test "$sed_script" ; then
# The ifcfg_file variable contains only existing files (cf. above how it is set):
Log "Migrating network configuration in $ifcfg_file"
Debug "sed_script for $sed_script_reason: '$sed_script'"
sed -i -e "$sed_script" "$ifcfg_file" || LogPrintError "Failed to migrate network configuration in $ifcfg_file"
else
Log "Not migrating network configuration in $ifcfg_file (empty sed_script)"
fi
# End handling Fedora and SUSE network configuration files (with sysconfig ifcfg configuration files):
done
# Handle Debian and Ubuntu network configuration files (with network interfaces configuration files).
# Because the bash option nullglob is set in rear (see usr/sbin/rear) nothing is done if no file matches.
# FIXME: The following code fails if file names contain characters from IFS (e.g. blanks),
# see https://github.com/rear/rear/pull/1514#discussion_r141031975
# and for the general issue see https://github.com/rear/rear/issues/1372
for restored_file in $TARGET_FS_ROOT/etc/network/inter[f]aces $TARGET_FS_ROOT/etc/network/interfaces.d/* ; do
# To be on the safe side we do not use 'interfaces_file' as variable name here because
# that name is used as non-local name in the linearize_interfaces_file function which is called below
# regardless that currently the linearize_interfaces_file function would not change an outer interfaces_file value
# because it is called with the outer interfaces_file value as $1 and then it sets interfaces_file=$1
network_interfaces_file="$( valid_restored_file_for_patching "$restored_file" )" || continue
Log "Migrating network configuration for $network_interfaces_file"
# Get new interface from the MAC address in case of inet renaming:
new_interface=$( get_device_by_hwaddr "$new_mac" )
if test "$new_cidr" ; then
# We have IP-address/CIDR like 192.168.100.101/24 so we use that without a separated netmask setting.
# The usual sed 's/regexp/replacement/flags' command delimiter character / is replaced by # here because
# the delimiter character must not appear in regexp or replacement but e.g. 192.168.100.101/24 contains it:
sed_script="/iface $new_interface/ s#;address [0-9.]*;#;address $new_ip_cidr;#g"
else
# We have a plain IP-address like 192.168.100.101 without CIDR:
if test "$new_netmask" ; then
# We also have a netmask so we use the plain IP-address plus a separated netmask setting:
sed_script="/iface $new_interface/ s#;address [0-9.]*;#;address $new_ip;#g ; /iface $new_interface/ s#;netmask [0-9.]*;#;netmask $new_netmask;#g"
else
# We have only a plain IP-address like 192.168.100.101 but no netmask so we can use only the plain IP-address
# but only a plain IP-address without netmask is likely insufficient so we tell the user about it:
LogPrintError "Only plain IP-address $new_ip without netmask can be set in $network_interfaces_file (likely insufficient)"
sed_script="/iface $new_interface/ s#;address [0-9.]*;#;address $new_ip;#g"
fi
fi
linearized_network_interfaces_file="$TMP_DIR/${network_interfaces_file##*/}.linearized"
linearize_interfaces_file "$network_interfaces_file" > "$linearized_network_interfaces_file"
# Apply the sed script:
Debug "sed_script for migrating network configuration for $network_interfaces_file in $linearized_network_interfaces_file: '$sed_script'"
sed -i -e "$sed_script" "$linearized_network_interfaces_file" || LogPrintError "Failed to migrate network configuration in $linearized_network_interfaces_file"
rebuild_interfaces_file_from_linearized "$linearized_network_interfaces_file" > "$network_interfaces_file"
# End handling Debian and Ubuntu network configuration files (with network interfaces configuration files):
done
# End of "while read interface old_mac new_mac new_ip_cidr":
done < $TMP_DIR/mappings/join_mac_ip_addresses
# End changing IP addresses and CIDR or netmask in network configuration files when there is content in .../mappings/ip_addresses:
fi
# Setting new default routing when there is content in ...mappings/routes:
if test -s $TMP_DIR/mappings/routes ; then
# Tell the user to do things manually in case of route-<interface> or static-routes configuration files.
# FIXME: The following code fails if file names contain characters from IFS (e.g. blanks),
# see https://github.com/rear/rear/pull/1514#discussion_r141031975
# and for the general issue see https://github.com/rear/rear/issues/1372
for restored_file in $TARGET_FS_ROOT/etc/sysconfig/*/route-*$interface* $TARGET_FS_ROOT/etc/sysconfig/static-rou[t]es ; do
routing_config_file="$( valid_restored_file_for_patching "$restored_file" )" || continue
LogPrintError "Cannot set routing in $routing_config_file - you need to do that manually"
done
# mappings/mac is e.g. (old-MAC-address new-MAC-address interface):
# 00:11:85:c2:b8:d5 00:50:56:b3:75:ad eth0
# 00:11:85:c2:b8:d7 00:50:56:b3:08:8c eth2
# 00:11:85:c2:b8:d9 00:50:56:b3:08:8e eth3
# and mappings/routes is e.g. (destination/CIDR gateway-IP interface):
# default 10.100.200.1 eth0
# 192.168.100.0/24 172.16.200.202 eth3
# so that "join -1 3 -2 3 mappings/mac mappings/routes" results on stdout (interface old-MAC-address new-MAC-address destination/CIDR gateway-IP):
# eth0 00:11:85:c2:b8:d5 00:50:56:b3:75:ad default 10.100.200.1
# eth3 00:11:85:c2:b8:d9 00:50:56:b3:08:8e 192.168.100.0/24 172.16.200.202
# Keep the join result in a file to make debugging easier in the recovery system after "rear recover":
join -1 3 -2 3 $TMP_DIR/mappings/mac $TMP_DIR/mappings/routes > $TMP_DIR/mappings/join_mac_routes
# Read $TMP_DIR/mappings/join_mac_routes contents:
while read interface old_mac new_mac destination gateway junk ; do
if ! test "$destination" = "default" ; then
# Tell the user to set non-default routing manually (i.e. non-default destination like 192.168.100.0/24)
LogPrintError "Cannot set routing for non-default destination $destination via gateway $gateway and interface $interface - you need to do that manually"
continue
fi
# Set default routing:
Log "Setting new default routing in network configuration files"
# Handle Fedora and SUSE default routing configuration files (with sysconfig ifcfg configuration files).
# Because the bash option nullglob is set in rear (see usr/sbin/rear) nothing is done if no file matches.
# FIXME: The following code fails if file names contain characters from IFS (e.g. blanks),
# see https://github.com/rear/rear/pull/1514#discussion_r141031975
# and for the general issue see https://github.com/rear/rear/issues/1372
for restored_file in $TARGET_FS_ROOT/etc/sysconfig/*/ifcfg-*$new_mac* $TARGET_FS_ROOT/etc/sysconfig/*/ifcfg-*$interface* $TARGET_FS_ROOT/etc/sysconfig/ne[t]work ; do
routing_config_file="$( valid_restored_file_for_patching "$restored_file" )" || continue
# etc/sysconfig/network syntay (excerpts):
# GATEWAY=gwip where gwip is the IP address of the remote network gateway if available
# GATEWAYDEV=gwdev where gwdev is the device name eth# you use to access the remote gateway
sed_script="s#^GATEWAY=.*#GATEWAY='$gateway'#g ; s#^GATEWAYDEV=.*#GATEWAYDEV='$interface'#g"
# Apply the sed script:
Debug "sed_script for setting default routing in $routing_config_file: '$sed_script'"
sed -i -e "$sed_script" "$routing_config_file" || LogPrintError "Failed to set default routing in $routing_config_file"
done
# Handle Debian and Ubuntu network configuration files (with network interfaces configuration files).
# Because the bash option nullglob is set in rear (see usr/sbin/rear) nothing is done if no file matches.
# FIXME: The following code fails if file names contain characters from IFS (e.g. blanks),
# see https://github.com/rear/rear/pull/1514#discussion_r141031975
# and for the general issue see https://github.com/rear/rear/issues/1372
for restored_file in $TARGET_FS_ROOT/etc/network/inter[f]aces $TARGET_FS_ROOT/etc/network/interfaces.d/* ; do
# To be on the safe side we do not use 'interfaces_file' as variable name here because
# that name is used as non-local name in the linearize_interfaces_file function which is called below
# regardless that currently the linearize_interfaces_file function would not change an outer interfaces_file value
# because it is called with the outer interfaces_file value as $1 and then it sets interfaces_file=$1
network_interfaces_file="$( valid_restored_file_for_patching "$restored_file" )" || continue
Log "Migrating network configuration for $network_interfaces_file"
# Get new interface from the MAC address in case of inet renaming:
new_interface=$( get_device_by_hwaddr "$new_mac" )
sed_script="/iface $new_interface/ s#;gateway [0-9.]*;#;gateway $gateway;#g"
linearized_network_interfaces_file="$TMP_DIR/${network_interfaces_file##*/}.linearized"
linearize_interfaces_file "$network_interfaces_file" > "$linearized_network_interfaces_file"
# Apply the sed script:
Debug "sed_script for setting default routing for $network_interfaces_file in $linearized_network_interfaces_file: '$sed_script'"
sed -i -e "$sed_script" "$linearized_network_interfaces_file" || LogPrintError "Failed to set default routing in $linearized_network_interfaces_file"
rebuild_interfaces_file_from_linearized "$linearized_network_interfaces_file" > "$network_interfaces_file"
done
# End of "while read interface old_mac new_mac destination gateway":
done < $TMP_DIR/mappings/join_mac_routes
# End setting new default routing when there is content in ...mappings/routes:
fi
unset -f valid_restored_file_for_patching