Added xdd (belongs to vi) to the PROGS array because also tool to dis…

…play binary files is needed in the recovery system

usr/share/rear/conf/GNU/Linux.conf

@@ -1,6 +1,5 @@
 # Architecture-independend Files
-REQUIRED_PROGS=(
-"${REQUIRED_PROGS[@]:-}"
+REQUIRED_PROGS+=(
 chroot
 ip
 less
@@ -9,17 +8,15 @@ route
 readlink
 )
 
-PROGS=(
-${PROGS[@]:-}
+PROGS+=(
 partprobe
 fdisk
 cfdisk
 sfdisk
 )
 
 # progs to take along
-PROGS=(
-${PROGS[@]:-}
+PROGS+=(
 rpc.statd
 rpcbind
 mknod
@@ -72,6 +69,7 @@ ping
 netstat
 free
 traceroute
+xxd
 vi
 pico
 nano
@@ -170,8 +168,7 @@ clear
 
 # the lib* serves to cover both 32bit and 64bit libraries!
 #
-LIBS=(
-${LIBS[@]:-}
+LIBS+=(
 
 ### needed for username lookups
 /lib*/libnss_dns*
@@ -208,7 +205,7 @@ ${LIBS[@]:-}
 /usr/lib*/libnssdbm3.so*
 )
 
-COPY_AS_IS=( ${COPY_AS_IS[@]:-} /dev /etc/inputr[c] /etc/protocols /etc/services /etc/rpc /etc/termcap /etc/terminfo /lib*/terminfo /usr/share/terminfo /etc/netconfig /etc/mke2fs.conf /etc/*-release /etc/localtime /etc/magic /usr/share/misc/magic /etc/dracut.conf /etc/dracut.conf.d /usr/lib/dracut /sbin/modprobe.ksplice-orig /etc/sysctl.conf /etc/sysctl.d /etc/e2fsck.conf )
+COPY_AS_IS+=( /dev /etc/inputr[c] /etc/protocols /etc/services /etc/rpc /etc/termcap /etc/terminfo /lib*/terminfo /usr/share/terminfo /etc/netconfig /etc/mke2fs.conf /etc/*-release /etc/localtime /etc/magic /usr/share/misc/magic /etc/dracut.conf /etc/dracut.conf.d /usr/lib/dracut /sbin/modprobe.ksplice-orig /etc/sysctl.conf /etc/sysctl.d /etc/e2fsck.conf )
 # Required by curl with https:
 # There are stored the distribution provided certificates
 # installed from packages, nothing confidential.
@@ -220,15 +217,16 @@ COPY_AS_IS=( ${COPY_AS_IS[@]:-} /dev /etc/inputr[c] /etc/protocols /etc/services
 # but somehow that does not work in practice, see also https://github.com/rear/rear/pull/1971
 # so that /etc/ca-certificates/* is added in the old "known to somehow work" style
 # that had been used before, cf. https://github.com/rear/rear/pull/1402
-COPY_AS_IS=( "${COPY_AS_IS[@]}" '/etc/ssl/certs/*' '/etc/pki/*' '/usr/lib/ssl/*' '/usr/share/ca-certificates/*' '/etc/ca-certificates/*' )
+COPY_AS_IS+=( '/etc/ssl/certs/*' '/etc/pki/*' '/usr/lib/ssl/*' '/usr/share/ca-certificates/*' '/etc/ca-certificates/*' )
 
 # exclude /dev/shm/*, due to the way we use tar the leading / should be omitted
-COPY_AS_IS_EXCLUDE=( ${COPY_AS_IS_EXCLUDE[@]:-} dev/shm/\* )
+COPY_AS_IS_EXCLUDE+=( dev/shm/\* )
 # Exclude private keys: /etc/pki/tls/private /etc/pki/CA/private /etc/pki/nssdb/key*.db and /usr/lib/ssl/private (cf. above):
-COPY_AS_IS_EXCLUDE=( "${COPY_AS_IS_EXCLUDE[@]}" '/etc/pki/tls/private' '/etc/pki/CA/private' '/etc/pki/nssdb/key*.db' '/usr/lib/ssl/private' )
+COPY_AS_IS_EXCLUDE+=( '/etc/pki/tls/private' '/etc/pki/CA/private' '/etc/pki/nssdb/key*.db' '/usr/lib/ssl/private' )
+
+# some stuff for the Linux command line (the leading blank is needed to add it as a separated word to the KERNEL_CMDLINE string):
+KERNEL_CMDLINE+=" selinux=0"
 
-# some stuff for the Linux command line
-KERNEL_CMDLINE="$KERNEL_CMDLINE selinux=0"
 # common users and groups
 CLONE_USERS+=( daemon rpc usbmuxd usbmux vcsa nobody dbus )
 CLONE_GROUPS+=( tty usbmuxd usbmux fuse kvm oinstall dbus )