- added 'kvm' group to CLONE_GROUPS variable;

- introduced TMPDIR variable to assist (user-defined prefix) the mktemp command. However, we should make sure that in rescue mode the TMPDIR variable is unset so the mktemp creates the BUILD_DIR under /tmp/rear.XXXXX (issue #323 and #157). By setting TMPDIR in local.conf we can choose were the BUILD_DIR resides (as it also contains the large ISO image);

- when we backup to ISO image make sure that the isofs module is copied to the rescue image (issue #326)

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

@@ -221,4 +221,4 @@ COPY_AS_IS_EXCLUDE=( ${COPY_AS_IS_EXCLUDE[@]} dev/shm/\* )
 KERNEL_CMDLINE="$KERNEL_CMDLINE selinux=0"
 # common users and groups
 CLONE_USERS=( "${CLONE_USERS[@]}" daemon rpc usbmuxd usbmux vcsa nobody)
-CLONE_GROUPS=( "${CLONE_GROUPS[@]}" tty usbmuxd usbmux fuse )
+CLONE_GROUPS=( "${CLONE_GROUPS[@]}" tty usbmuxd usbmux fuse kvm )

usr/share/rear/conf/default.conf

@@ -735,3 +735,9 @@ WAIT_SECS=30
 # instead of the internal ones (no success guaranteed although). E.g. in case the destination has no internal disks.
 # making the variable (y,Y,1) to enable
 BOOT_OVER_SAN=
+
+# the TMPDIR influences the mktemp command to define an alternative basedir instead of /tmp
+# useful in case he /tmp is not large enough to contain ISO images and/or backup archives
+# be careful the directory MUST exist otherwise you will get an error by mktemp
+TMPDIR=""
+export TMPDIR    # the export is required so that mktemp can pickup the variable

usr/share/rear/prep/ISO/GNU/Linux/34_add_isofs_module.sh

@@ -0,0 +1,11 @@
+# if $scheme=iso then we must have isofs module in rescue mode so that we can
+# loopback mount the ISO containing the backup
+# BACKUP_URL=iso://backup
+
+local scheme=$(url_scheme $BACKUP_URL)
+
+case "$scheme" in
+    (iso)
+        MODULES=( ${MODULES[@]} isofs )
+        ;;
+esac

usr/share/rear/rescue/GNU/Linux/60_unset_TMPDIR_in_rescue_conf.sh

@@ -0,0 +1,8 @@
+cat - <<EOF >> "$ROOTFS_DIR/etc/rear/rescue.conf"
+# TMPDIR variable may be defined in local.conf file as prefix dir for mktemp command
+# e.g. by defining TMPDIR=/var we would get our BUILD_DIR=/var/tmp/rear.XXXXXXXXXXXX
+# However, in rescue we want our BUILD_DIR=/tmp/rear.XXXXXXX as we are not sure that
+# the user defined TMPDIR would exist in our rescue image
+# by 'unset TMPDIR' we achieve above goal (as rescue.conf is read after local.conf)!
+unset TMPDIR
+EOF