package/base-files: add support for the switch LED trigger

[openwrt.git] / package / base-files / files / sbin / sysupgrade

diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index d251cc9..fcf01b0 100755 (executable)
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -10,6 +10,7 @@ export SAVE_CONFIG=1
 export SAVE_OVERLAY=0
 export DELAY=
 export CONF_IMAGE=
+export CONF_BACKUP=
 export HELP=0
 
 # parse options
@@ -21,6 +22,7 @@ while [ -n "$1" ]; do
                -q) export VERBOSE="$(($VERBOSE - 1))";;
                -n) export SAVE_CONFIG=0;;
                -c) export SAVE_OVERLAY=1;;
+               -b|--create-backup) export CONF_BACKUP="$2"; shift;;
                -f) export CONF_IMAGE="$2"; shift;;
                -h|--help) export HELP=1; break;;
                -*)
@@ -38,7 +40,7 @@ export CONF_TAR=/tmp/sysupgrade.tgz
 export ARGV="$*"
 export ARGC="$#"
 
-[ -z "$ARGV" -o $HELP -gt 0 ] && {
+[ -z "$ARGV" -a -z "$CONF_BACKUP" -o $HELP -gt 0 ] && {
        cat <<EOF
 Usage: $0 [options] <image file or URL>
 
@@ -47,6 +49,10 @@ Options:
        -f <config>  restore configuration from .tar.gz (file or url)
        -i           interactive mode
        -c           attempt to preserve all changed files in /etc/
+       -b / --create-backup <file>
+                    create .tar.gz of files specified in sysupgrade.conf
+                    then exit. Does not flash an image. If file is '-',
+                    i.e. stdout, verbosity is set to 0 (i.e. quiet).
        -n           do not save configuration over reflash
        -q           less verbose
        -v           more verbose
@@ -56,6 +62,17 @@ EOF
        exit 1
 }
 
+[ -n "$ARGV" -a -n "$CONF_BACKUP" ] && {
+       cat <<-EOF
+               -b/--create-backup does not perform a firmware upgrade. Do not
+               specify both -b and a firmware image.
+       EOF
+       exit 1
+}
+
+# prevent messages from clobbering the tarball when using stdout
+[ "$CONF_BACKUP" = "-" ] && export VERBOSE=0
+
 add_uci_conffiles() {
        local file="$1"
        ( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
@@ -85,6 +102,8 @@ sysupgrade_image_check="platform_check_image"
 include /lib/upgrade
 
 do_save_conffiles() {
+       local conf_tar="${1:-$CONF_TAR}"
+
        [ -z "$(rootfs_type)" ] && {
                echo "Cannot save config while running from ramdisk."
                ask_bool 0 "Abort" && exit
@@ -95,9 +114,14 @@ do_save_conffiles() {
 
        v "Saving config files..."
        [ "$VERBOSE" -gt 1 ] && TAR_V="v" || TAR_V=""
-       tar c${TAR_V}zf "$CONF_TAR" -T "$CONFFILES" 2>/dev/null
+       tar c${TAR_V}zf "$conf_tar" -T "$CONFFILES" 2>/dev/null
 }
 
+if [ -n "$CONF_BACKUP" ]; then
+       do_save_conffiles "$CONF_BACKUP"
+       exit $?
+fi
+
 type platform_check_image >/dev/null 2>/dev/null || {
        echo "Firmware upgrade is not implemented for this platform."
        exit 1
@@ -128,12 +152,12 @@ else
        export SAVE_CONFIG=0
 fi
 
+run_hooks "" $sysupgrade_pre_upgrade
+
 kill_remaining TERM
 sleep 3
 kill_remaining KILL
 
-run_hooks "" $sysupgrade_pre_upgrade
-
 if [ -n "$(rootfs_type)" ]; then
        v "Switching to ramdisk..."
        run_ramfs '. /etc/functions.sh; include /lib/upgrade; do_upgrade'