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This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
For more information, please refer to <http://unlicense.org/>

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# cpufreq
Display current CPU frequencies from `/proc/cpuinfo`. This is a sample of the Nim language.
```
Usage: cpufreq [-b|--brief] [-t|--table] [-h|--help] [-v|--version]
```
# Build from source
First install Nim language compiler. See instructions of [Nim site](https://nim-lang.org/install.html).
Compile programm:
```
nim c cpufreq.nim
```
Done! You can place `cpufreq` executable to your PATH, e.g. `/urs/local/bin`.

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#[
cpufreq - display currrent CPU frequencies from /proc/cpuinfo
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
For more information, please refer to <http://unlicense.org/>
]#
import std/nre
import std/sequtils
import std/strutils
import std/parseopt
const Version: string = "0.1.0"
const Usage: string ="""
Display current CPU frequencies from /proc/cpuinfo
Usage: cpufreq [-b|--brief] [-t|--table] [-h|--help] [-v|--version]"""
proc countCPU(CPUInfo: string): int =
# Count CPU cores. Return integer value, e.g. 8.
var processors = CPUInfo.findAll(re"processor")
result = count(processors, "processor")
proc getModelName(CPUInfo: string): string =
# Return processor manufacturer and model name.
var model = CPUInfo.find(re"(?<=model name)(.*)").get.captures[-1]
result = model.find(re"(?<=: )(.*)").get.captures[-1]
proc getCPUFreq(CPUInfo: string): seq[string] =
# Return sequence of stings with CPU frequencies. For example output:
# @["1400.000", "1400.000", "2100.000", "1790.073"]
var raw_freqs: seq[string] = CPUInfo.findAll(re"(?<=cpu MHz)(.*)(?i)")
var freqs: seq[string] = @[]
for freq in raw_freqs:
freqs.add(freq.replace("\t\t: ", ""))
result = freqs
iterator countTo(n: int): int =
var i = 0
while i <= n:
yield i
inc i
proc displayFreqsAsList(CPUFreqs: seq[string], CPUs: int) =
for cpu in countTo(CPUs - 1):
echo "CPU", cpu, ": ", CPUFreqs[cpu]
proc displayFreqsAsTable(CPUFreqs: seq[string], CPUs: int) =
for cpu in countTo(CPUs - 1):
stdout.write "CPU", cpu, "\t\t"
echo "\n", CPUFreqs.join("\t")
# Toggles for '--brief' and '--table' options
var brief: bool = false
var table: bool = false
# Parse command line options
var optparser = initOptParser()
while true:
optparser.next()
case optparser.kind
of cmdEnd: break
of cmdShortOption, cmdLongOption:
case optparser.key
of "help", "h": echo Usage; system.quit(0)
of "version", "v": echo Version; system.quit(0)
of "brief", "b": brief = true
of "table", "t": table = true
else:
echo "Unknown option: ", optparser.key
echo Usage
system.quit(1)
of cmdArgument:
discard
# Read /proc/cpuinfo and display info
let CPUInfo = readFile("/proc/cpuinfo")
let CPUModel: string = getModelName(CPUInfo)
let CPUs: int = countCPU(CPUInfo)
let CPUFreqs: seq[string] = getCPUFreq(CPUInfo)
if brief == false:
echo "CPU model: ", CPUModel
echo "CPU cores: ", CPUs
echo ""
if isEmptyOrWhitespace(CPUFreqs.join) == true:
echo "Sorry, frequencies info is not available for your CPU :("
system.quit(1)
if table == false:
displayFreqsAsList(CPUFreqs, CPUs)
else:
displayFreqsAsTable(CPUFreqs, CPUs)