| #!/bin/sh |
| # Copyright (c) 2012 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. |
| |
| if [ $# -ne 1 ]; then |
| echo "usage: $(basename $0) <archive-dir>" >&2 |
| exit 1 |
| fi |
| |
| ARCHIVE="$1" |
| mkdir -p $ARCHIVE |
| |
| # All uptime values are recorded as "time since boot". To |
| # facilitate comparing archived times against other times measured |
| # against a different boot time, we capture timestamps with both |
| # `date` and `bootstat` so we can reconstruct times in UTC later. |
| # Since the two gathered times will be slightly different, we run |
| # `date` at both the start and end of the operation, so as to put a |
| # bound on the measurement error. |
| |
| date '+%s.%N' >$ARCHIVE/timestamp |
| bootstat archive |
| # -fPp: overwrite pre-existing files; don't follow symlinks; |
| # preserve mode, owner and file times. |
| cp -fPp /tmp/uptime-* /tmp/disk-* $ARCHIVE |
| date '+%s.%N' >>$ARCHIVE/timestamp |
