local/bin: add scripts

Author: johnlettman

local/bin/asciify

@@ -0,0 +1,77 @@
+#!/bin/sh
+
+if [ "$1" = "-h" ]; then
+	cat <<EOF>&2
+Usage: ${0##*/} [FILES]
+
+Convert non-ASCII characters to their ASCII equivalent. If no files are
+provided, use stdin.
+
+Options:
+
+  -i: If files are provided, convert them in-place.
+
+EOF
+	exit
+fi
+
+unset OPT
+if [ "$1" = "-i" ]; then
+	OPT=-i
+	shift
+fi
+
+## Note that we also use 'sed -i' to edit files instead of 'ex'. Otherwise the
+## code looks ugly if we try to handle both stdin and files with only one
+## call. Besides, ex does not support multiple file editing.
+sed $OPT \
+		-e 's/[áàâä]/a/g' \
+		-e 's/[éèêë]/e/g' \
+		-e 's/[íìîï]/i/g' \
+		-e 's/[óòôö]/o/g' \
+		-e 's/[úùûü]/u/g' \
+		-e 's/[ýỳŷÿ]/y/g' \
+		-e 's/[ÁÀÂÄ]/A/g' \
+		-e 's/[ÉÈÊË]/E/g' \
+		-e 's/[ÍÌÎÏ]/I/g' \
+		-e 's/[ÓÒÔÖ]/O/g' \
+		-e 's/[ÚÙÛÜ]/U/g' \
+		-e 's/[ÝỲŶŸ]/Y/g' \
+		-e 's/[ñ]/n/g' \
+		-e 's/[œ]/oe/g' \
+		-e 's/[Œ]/Oe/g' \
+		-e 's/[æ]/ae/g' \
+		-e 's/[Æ]/Ae/g' \
+		-e 's/[ç]/c/g' \
+		-e 's/[Ç]/C/g' \
+		-e 's/[ß]/ss/g' \
+		-e 's/[«»„“”‚‘’]/"/g' \
+		-e 's/[©]/(C)/g' \
+		-e 's/[®]/(R)/g' \
+		-e 's/[™]/(TM)/g' \
+		-e 's/[¥]/Y/g' \
+		-e 's/[Ð]/D/g' \
+		-e 's/[ŀ]/l/g' \
+		-e 's/[Ŀ]/L/g' \
+		-e 's/[€]/euro/g' \
+		-e 's/[¢]/cent/g' \
+		-e 's/[£]/pound/g' \
+		-e 's/[µ]/mu/g' \
+		-e 's/[²]/^2/g' \
+		-e 's/[³]/^3/g' \
+		-e 's/[¡]/!/g' \
+		-e 's/[¿]/?/g' \
+		-e 's/[–‑]/-/g' \
+		-e 's/[…]/.../g' \
+		-e 's/[≤]/<=/g' \
+		-e 's/[≥]/>=/g' \
+		-e 's/[±]/+\/-/g' \
+		-e 's/[≠]/!=/g' \
+		-e 's/[⋅]/./g' \
+		-e 's/[×]/x/g' \
+		-e 's/[÷]/\//g' \
+		-e 's/[↓]/|/g' \
+		-e 's/[↑]/^/g' \
+		-e 's/[←]/<=/g' \
+		-e 's/[→]/=>/g' \
+		"$@"

local/bin/cpuusage

@@ -0,0 +1,63 @@
+#!/bin/sh
+
+if [ "$1" = "-h" ]; then
+	cat <<EOF>&2
+Usage: ${0##*/}
+
+Return the CPU usage. Linux only.
+
+EOF
+	exit
+fi
+
+if [ ! "$(uname)" = "Linux" ]; then
+	echo >&2 "Linux only."
+	exit 1
+fi
+
+
+## CPU usage
+##
+## A typical CPU array is (on Linux Kernel 3.0)
+##   cpu  158150 0 52354 18562746 1472 0 10198 0 0 0
+##
+## The meanings of the columns are as follows, from left to right:
+##
+##   user: normal processes executing in user mode
+##   nice: niced processes executing in user mode
+##   system: processes executing in kernel mode
+##   idle: twiddling thumbs
+##   iowait: waiting for I/O to complete
+##   irq: servicing interrupts
+##   softirq: servicing softirqs
+##   ... (see 'man 5 proc' for further details)
+##
+## Only the first 4 values are interesting here.
+
+cpuarray="$(grep '^cpu ' /proc/stat)"
+## We start at field #3 since there are 2 spaces after 'cpu'.
+f1=$(echo "$cpuarray" | cut -f3 -d' ')
+f2=$(echo "$cpuarray" | cut -f4 -d' ')
+f3=$(echo "$cpuarray" | cut -f5 -d' ')
+f4=$(echo "$cpuarray" | cut -f6 -d' ')
+
+totalA=$((f1+f2+f3+f4))
+idleA=$f4
+sleep 1
+
+cpuarray="$(grep '^cpu ' /proc/stat)"
+f1=$(echo "$cpuarray" | cut -f3 -d' ')
+f2=$(echo "$cpuarray" | cut -f4 -d' ')
+f3=$(echo "$cpuarray" | cut -f5 -d' ')
+f4=$(echo "$cpuarray" | cut -f6 -d' ')
+
+totalB=$((f1+f2+f3+f4))
+idleB=$f4
+
+totaldiff=$((${totalB:-0}-${totalA:-0}))
+
+if [ $totaldiff -eq 0 ]; then
+	echo 0
+else
+	echo "$((100 - 100 * (idleB-idleA) / totaldiff))"
+fi