scripts: make all POSIX compliant

scripts/beep-charlie

@@ -1,12 +1,15 @@
 #!/bin/sh
 
 lock=/tmp/.beep-lock
-test -f $lock && exit 1 || touch $lock
-head -c 8 /dev/urandom | \
-   hexdump -v -e '/1 "%u\n"' | \
-   awk '{ split("0,3,5,6,7,10,12",a,","); \
-   for (i = 0; i < 1; i+= 0.00012) \
-   printf("%08X\n", 60*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' | \
-   xxd -r -p | \
+test -f $lock && exit 1
+touch $lock
+
+head -c 8 /dev/urandom |
+   hexdump -v -e '/1 "%u\n"' |
+   awk '{ split("0,3,5,6,7,10,12",a,",");
+   for (i = 0; i < 1; i+= 0.00012)
+   printf("%08X\n", 60*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' |
+   xxd -r -p |
    aplay -c 1 -f S32_LE -r 48000 -D plug:default
+
 rm -f $lock

scripts/beep-wigfrid

@@ -1,12 +1,15 @@
 #!/bin/sh
 
 lock=/tmp/.beep-lock
-test -f $lock && exit 1 || touch $lock
+test -f $lock && exit 1
+touch $lock
+
 head -c 4 /dev/urandom | \
-   hexdump -v -e '/1 "%u\n"' | \
-   awk '{ split("0,3,5,6,7,10,12",a,","); \
-   for (i = 0; i < 1; i+= 0.00011) \
-   printf("%08X\n", 40*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' | \
-   xxd -r -p | \
+   hexdump -v -e '/1 "%u\n"' |
+   awk '{ split("0,3,5,6,7,10,12",a,",");
+   for (i = 0; i < 1; i+= 0.00011)
+   printf("%08X\n", 40*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' |
+   xxd -r -p |
    aplay -c 2 -f S16_LE -r 48000 -Dplug:hdmi1
+
 rm -f $lock

scripts/brightness

@@ -5,7 +5,7 @@
 current=$(cat /sys/class/backlight/intel_backlight/brightness)
 
 if test -z "$1"; then
-  echo $current
+  echo "$current"
   exit 0
 fi
 
@@ -15,7 +15,7 @@ case "$1" in
     echo "missing increment"
     exit 1
   fi
-  new=$(("$current" "$1" "$2"))
+  new="$((current $1 $2))"
 ;;
 *)
   echo "invalid argument '$1'"
@@ -24,4 +24,4 @@ case "$1" in
 esac
 
 echo "current: $new"
-echo $new > /sys/class/backlight/intel_backlight/brightness
+echo "$new" > /sys/class/backlight/intel_backlight/brightness

scripts/color-mode

@@ -2,19 +2,20 @@
 
 xcolor() { xrdb -query | grep -Po "color$1:\s+\K#\w+"; }
 
-xrdb -override $XDG_CONFIG_HOME/x/$1
+xrdb -override "$XDG_CONFIG_HOME/x/$1"
 
 pkill -USR1 'qutebrowser|urxvt'
-$XDG_CONFIG_HOME/bspwm/bspwmrc
+"$XDG_CONFIG_HOME/bspwm/bspwmrc"
 
-if test "$1" == light; then
-  xsetroot -fg $(xcolor 14) -bg $(xcolor 11) -bitmap ~/img/tiles/tile.xbm
-  bspc config focused_border_color  $(xcolor 3)
-  bspc config normal_border_color   $(xcolor 8)
-  bspc config presel_feedback_color $(xcolor 3)
+if test "$1" = light; then
+  xsetroot -fg "$(xcolor 14)" -bg "$(xcolor 11)" \
+            -bitmap ~/img/tiles/tile.xbm
+  bspc config focused_border_color  "$(xcolor 3)"
+  bspc config normal_border_color   "$(xcolor 8)"
+  bspc config presel_feedback_color "$(xcolor 3)"
 fi
 
-if test "$1" == dark; then
+if test "$1" = dark; then
   xsetroot -fg \#4F5B66 -bg \#343D46 -bitmap ~/img/tiles/tile.xbm
 fi
 

scripts/redshift-acpi

@@ -15,7 +15,7 @@ deref() {
 
 fade_to() {
   current=$(brightness)
-  echo $current $1
+  echo "$current $1"
   step=10
   [ "$current" -gt "$1" ] && sign=- || sign=+
   for i in $(seq "$current" "${sign}$step" "$1"); do

scripts/redshift-i2c

@@ -18,22 +18,22 @@ deref() {
 }
 
 set_brightness() {
-  sudo ddccontrol $device -r 0x10 -w > /dev/null $1 2>&1
+  sudo ddccontrol $device -r 0x10 -w > /dev/null "$1" 2>&1
 }
 
 fade_to() {
   current=$(sudo ddccontrol $device -r 0x10 2> /dev/null | grep -oP '\+/\K[0-9]+')
-  [ $current -gt $1 ] && step=-1 || step=1
-  for i in $(seq $current $step $1); do
-    set_brightness $i
+  [ "$current" -gt "$1" ] && step=-1 || step=1
+  for i in $(seq "$current" "$step" "$1"); do
+    set_brightness "$i"
     sleep 1
   done
 }
 
 
-if [ $1 = "period-changed" ]; then
+if [ "$1" = "period-changed" ]; then
   if ! (lsmod | grep -q "^i2c_dev"); then
     sudo modprobe i2c-dev
   fi
-  fade_to $(deref $3)
+  fade_to "$(deref "$3")"
 fi

scripts/wa

@@ -1,44 +1,41 @@
-#!/usr/bin/sh
+#!/bin/sh
 
 ## WolframAlpha CLI
 
 # load api key
-token="${XDG_CONFIG_HOME:-$HOME}/wolfram"
-source $token
+token="$XDG_CONFIG_HOME/wolfram"
+. "$token"
 
 # properly encode query
-q=$(echo ${*} | sed 's/+/%2B/g' | tr '\ ' '\+')
+q=$(echo "$*" | sed 's/+/%2B/g' | tr '\ ' '\+')
 
 # fetch and parse result
-result=$(curl -s "http://api.wolframalpha.com/v2/query?input=${q}&appid=${API_KEY}&format=plaintext")
+result="$(curl -s "http://api.wolframalpha.com/v2/query?input=$q&appid=$API_KEY&format=plaintext")"
 
-if [ -n "$(echo ${result} | grep 'Invalid appid')" ] ; then
+if echo "$result" | grep -q 'Invalid appid'; then
   echo "Invalid API key!"
   echo "Get one at https://developer.wolframalpha.com/portal/apisignup.html"
-  echo -n 'Enter your WolframAlpha API key:'
-  read api_key
-  echo "API_KEY=${api_key}" >> $token
+  printf 'Enter your WolframAlpha API key:'
+  read -r api_key
+  echo "API_KEY=${api_key}" >> "$token"
   exit 1
 fi
 
-result=`echo "${result}" \
-  | tr '\n' '\t' \
-  | sed -e 's/<plaintext>/\'$'\n<plaintext>/g' \
-  | grep -oE "<plaintext>.*</plaintext>|<pod title=.[^\']*" \
-  | sed -e 's!<plaintext>!!g; \
-    s!</plaintext>!!g; \
-    s!<pod title=.*!\\\x1b[1;36m&\\\x1b[0m!g; \
-    s!^!    !g; \
-    s!<pod title=.!\n!g; \
-    s!\&amp;!\&!g; \
-    s!\&lt;!<!g; \
-    s!\&gt;!>!g; \
-    s!\&quot;!"!g' \
-    -e "s/\&apos;/'/g" \
-  | tr '\t' '\n' \
-  | sed  '/^$/d; \
-    s/\ \ */\ /g; \
-    s/\\\:/\\\u/g'`
-
-# print result
-echo -e "${result}"
+echo "$result" |
+  tr '\n' '\t' |
+  sed -e 's/<plaintext>/\n<plaintext>/g' |
+  grep -oE "<plaintext>.*</plaintext>|<pod title=.[^\']*" |
+  sed -e 's!<plaintext>!!g'                     \
+      -e 's!</plaintext>!!g'                    \
+      -e 's!<pod title=.*!\x1b[1;36m&\x1b[0m!g' \
+      -e 's!^!    !g'                           \
+      -e 's!<pod title=.!\n!g'                  \
+      -e 's!\&amp;!\&!g'                        \
+      -e 's!\&lt;!<!g'                          \
+      -e 's!\&gt;!>!g'                          \
+      -e 's!\&quot;!"!g'                        \
+      -e "s/\&apos;/'/g" |
+  tr '\t' '\n' |
+  sed -e '/^$/d;' \
+      -e 's/\ \ */\ /g;' \
+      -e 's/\\\:/\\\u/g'