| #!/bin/sh |
| |
| # Copyright (c) 2010 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 script looks to see if a log file is zero length, or non |
| # existent before writing something to stdout, so that we don't end up |
| # with empty entries that just look broken. |
| |
| max_lines=${2:-1000} |
| file=$1 |
| |
| [ "$file" = "/dev/stdin" ] && tail --lines=$max_lines "$file" && exit |
| |
| if [ -h "$file" ]; then |
| file="$(readlink -f $file)" |
| fi |
| |
| if [ -r "$file" -a -f "$file" ]; then |
| size=$(/bin/ls -s "$file") |
| # Get the first field. |
| size=${size%% *} |
| if [ $size -gt 0 ]; then |
| /usr/bin/tail --lines=$max_lines "$file" |
| else |
| echo "<empty>" |
| fi |
| else |
| echo "<not available>" |
| fi |
