memento_updater: reduce message flood by controlling wget output format

memento_updater.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is the autoupdater for Memento. When called it consults Omaha to see
 # if there's an update available. If so, it downloads it to the other
 # partition on the Memento USB stick, then alters the MBR and partitions
 # as needed so the next reboot will boot into the newly installed partition.
@@ skipping 212 matching lines @@
 
 CHECKSUM_FILE="/tmp/memento_autoupdate_checksum"
 
 # Generally we pipe to split_write to write to two devices, but if
 # KINSTALL_DEV is 'none' we write directly to a specific output device.
 WRITE_COMMAND='cat > "$INSTALL_DEV"'
 if [ "$KINSTALL_DEV" != "none" ]; then
   WRITE_COMMAND='"$(dirname "$0")"/split_write "$KINSTALL_DEV" "$INSTALL_DEV"'
 fi
 
-COMMAND='wget -O - --load-cookies <(echo "$COOKIES") \
+COMMAND='wget --progress=dot:mega -O - --load-cookies <(echo "$COOKIES") \
   "$IMG_URL" 2>> "$MEMENTO_AU_LOG" | \
   tee >(openssl sha1 -binary | openssl base64 > "$CHECKSUM_FILE") | \
   gzip -d | '${WRITE_COMMAND}' ; echo ${PIPESTATUS[*]}'
 
 RETURNED_CODES=$(eval "$COMMAND")
 
 EXPECTED_CODES="0 0 0 0"
 CALCULATED_CS=$(cat "$CHECKSUM_FILE")
 rm -f "$CHECKSUM_FILE"
 
@@ skipping 102 matching lines @@
   touch "$UPDATED_COMPLETED_FILE"
 fi
 
 # Flush linux caches; seems to be necessary
 sync
 echo 3 > /proc/sys/vm/drop_caches
 
 # tell user to reboot
 log Autoupdate applied. You should now reboot
 echo UPDATED