I got one of those new-fangled Asus Eee PCs recently (with Xandros and not the other thing, obviously) and, being the paranoid freak that I am, I needed to check out how long the battery lasts. And I needed to do that every single time I used it.
So I mashed up a little script for it, and then started adding functionality to it with almost every run, and it sort of grew. So I recently added the traditional getopt stuff, and a license and some basic error checking, and decided to post it.
It needs acpi and uptime to run at all, and if you want to print stuff out to stdout as well, then you need tee.
It should be pretty straightforward to use, but here's an overview anyway.
First, you gotta make sure that the directory for the logs already exists, or that the script will be able to create it on its own. Personally, I do the first one. The default directory is /var/log/uptimed, so you would go:
sudo mkdir -p /var/log/uptimed
sudo chmod a+rw /var/log/uptimed
And basically, you're all set to go. Now you can run it by simply going:
./uptimed &
Or you can use one of the many available options, like adding a prefix, a suffix and printing the output to screen as well as the log file:
./uptimed -s -c "some suffix" -p "some prefix" &
Enough rambling, here's the code.
1 #!/bin/bash
2 #
3 # uptimed (uptime daemon)
4 #
5 # Checks uptime and some acpi settings from time to time and logs
6 # that information in a specified file. It's designed to be run often.
7 #
8 # Parameters:
9 # -t | --sleep-time time between checks (default: 6 minutes)
10 # -s | --stdout write info to stdout as well as the file
11 # -f | --file write to a log file with a name like this one
12 # -e | --extension specify an extensionto the log file
13 # -u | --no-uptime DON'T log current uptime
14 # -b | --no-battery DON'T log batery charge
15 # -d | --no-thermal DON'T log current temperature
16 # -a | --all log uptime, battery and thermal (default)
17 # -c | --comment append a comment to each line (default: empty)
18 # -p | --prefix prepend a comment to each line (default: empty)
19 #
20 # Requires:
21 # uptime
22 # acpi
23 # tee
24 #
25 # Author:
26 # Konrad Siek <konrad.siek@gmail.com>
27 #
28 # License information:
29 #
30 # This program is free software: you can redistribute it and/or modify
31 # it under the terms of the GNU General Public License as published by
32 # the Free Software Foundation, either version 3 of the License, or
33 # (at your option) any later version.
34 #
35 # This program is distributed in the hope that it will be useful,
36 # but WITHOUT ANY WARRANTY; without even the implied warranty of
37 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
38 # GNU General Public License for more details.
39 #
40 # You should have received a copy of the GNU General Public License
41 # along with this program. If not, see <http://www.gnu.org/licenses/>.
42 #
43 # Copyright 2009 Konrad Siek
44
45 # Presets
46 sleep_time=360
47 echo_stdin=false #true
48 filename=/var/log/uptimed/uptime
49 extension=`date +%Y%m%d`
50 uptime_on=true
51 battery_on=true
52 thermal_on=true
53 comment=""
54
55 # Retrieve program parameters
56 options=$( \
57 getopt -o t:s::f:e:ubdac:p: \
58 --long sleep-time:,stdout::,file:,extension:,\
59 no-uptime,no-battery,no-thermal,all,comment:,prefix \
60 -n $0 -- "$@" \
61 )
62
63 # Check if getopts worked as it should
64 [ $? != 0 ] &&
65 exit 1
66
67 # Iterate over parameters and set up the program
68 eval set -- "$options"
69 while true
70 do
71 case "$1" in
72 -t|--sleep-time)
73 sleep_time=$2
74 shift 2
75 ;;
76 -f|--file)
77 filename=$2
78 shift 2
79 ;;
80 -e|--extension)
81 extension=$2
82 shift 2
83 ;;
84 -s|--stdout)
85 if [ "$2" != "" ]
86 then
87 echo_stdin=$2
88 else
89 echo_stdin=true
90 fi
91 shift 2
92 ;;
93 -u|--no-uptime)
94 uptime_on=$false
95 shift 1
96 ;;
97 -b|--no-battery)
98 battery_on=$false
99 shift 1
100 ;;
101 -d|--no-thermal)
102 thermal_on=$false
103 shift 1
104 ;;
105 -c|--comment)
106 comment="$2"
107 shift 2
108 ;;
109 -p|--prefix)
110 prefix="[$2] "
111 shift 2
112 ;;
113 -a|--all)
114 uptime_on=true
115 battery_on=true
116 thermal_on=true
117 shift 1
118 ;;
119 --)
120 shift
121 break
122 ;;
123 *)
124 echo "This is, of course, impossible... Milliways?" >& 2
125 exit -1
126 ;;
127 esac
128 done
129
130 # Create the base directory,
131 dir=`dirname "$filename.$extension"`
132 if [ ! \( -d "$dir" \) ]
133 then
134 mkdir -p "$dir"
135 if [ $? != 0 ]
136 then
137 echo "$0:Directory does not exist and can't be created: $dir" >& 2
138 exit 1
139 fi
140 fi
141
142 # Create the log file.
143 if [ ! \( -e "$filename.$extension" \) ]
144 then
145 touch "$filename.$extension"
146 if [ $? != 0 ]
147 then
148 echo "$0:File does not exist and can't be created: $dir" >& 2
149 exit 1
150 fi
151 fi
152
153 # The main loop thing.
154 while true
155 do
156 # Gather information.
157 [ $uptime_on ] && \
158 uptime=`uptime | tr -s ' ' | cut -f 1 --complement -d ' '`
159 [ $battery_on ] && \
160 battery=`acpi -b | tr -s ' ' | cut -f 2,5,6,7 -d ' '`
161 [ $thermal_on ] && \
162 thermal=`acpi -tB | tr -s ' ' | cut -f 4,5,7 -d ' ' | tr -d ','`
163
164 # Compose the message.
165 message=""
166 [ -n "$uptime" ] && \
167 message="$message$uptime "
168 [ -n "$battery" ] && \
169 message="$message$battery "
170 [ -n "$thermal" ] && \
171 message="$message$thermal "
172 [ -n "$comment" ] && \
173 message="$message#$comment"
174 [ -n "$prefix" ] && \
175 message="$prefix$message"
176
177 # Send message to file, etc.
178 [ $echo_stdin == true ] && \
179 echo -e $message | tee -a "$filename.$extension" || \
180 echo -e $message >> "$filename.$extension"
181
182 # Wait and repeat.
183 sleep $sleep_time
184 done
The code is also available at GitHub as bash/uptimed.
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