commit 311828d427ca1f3fe61a5de97ad22a4a6bf84342
Author: Luxferre <lux@ferre>
Date: Fri, 28 Jul 2023 22:05:58 +0300
initial upload
Diffstat:
| A | COPYING | | | 24 | ++++++++++++++++++++++++ |
| A | README.md | | | 16 | ++++++++++++++++ |
| A | nnlight.sh | | | 26 | ++++++++++++++++++++++++++ |
| A | nnstatus.sh | | | 107 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | nnwifi.sh | | | 67 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
5 files changed, 240 insertions(+), 0 deletions(-)
diff --git a/COPYING b/COPYING
@@ -0,0 +1,24 @@
+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 <https://unlicense.org>
diff --git a/README.md b/README.md
@@ -0,0 +1,15 @@
+# no-nonsense shell scripts
+
+This is a set of (mostly Linux-specific unless stated otherwise) various useful shell scripts that aim to be lightweight and portable across different shells. All scripts were tested on `busybox sh` and `oksh`. The list is going to be updated from time to time. Please see the source code comments for usage guides.
+
+## Current script list
+
+- `nnwifi.sh`: easily set up a WiFi connection (depends on `ip`, `iw`, `wpa_supplicant` and `udhcpc`)
+- `nnlight.sh`: control laptop screen brightness (depends on `nawk` or other AWK command)
+- `nnstatus.sh`: output useful status information to dzen2 panel (Xorg-specific but can be rewritten to use any other panel of your choice, depends on `nawk` or other AWK command, `iw` for WLAN stats, `amixer` for volume controls and xkb-switch for keyboard layout controls)
+
+## Credits
+
+All scripts in this repo were created by Luxferre starting from 2023 and released into public domain.
+
+Made in Ukraine.
+\ No newline at end of file
diff --git a/nnlight.sh b/nnlight.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+# no-nonsense backlight manager (Linux-specific)
+# usage: sh nnlight.sh [value|+value|-value|?]
+# the script must be run as root
+# (can configure in /etc/doas.conf to run without password)
+# Created by Luxferre in 2023, released into public domain
+
+RAWVAL="$1"
+AWK_CMD=nawk # override if you need
+
+# attempt to autodetect the backlight driver
+# you can override the BRFILE variable manually if it fails
+
+RBLD="/sys/class/backlight"
+BNAME="$(ls -l $RBLD | $AWK_CMD -F / '/LVDS|eDP/{print $NF}')"
+BRFILE="$RBLD/$BNAME/brightness"
+
+CURVAL="$(cat $BRFILE)" # get current brightness
+SUBVAL="${RAWVAL#?}" # remove the first char from input
+case "$RAWVAL" in
+ \?) printf "%u\n" "$CURVAL" ;;
+ +*) printf "%u" "$((CURVAL + SUBVAL))" > $BRFILE ;;
+ -*) printf "%u" "$((CURVAL - SUBVAL))" > $BRFILE ;;
+ *) printf "%u" "$RAWVAL" > $BRFILE ;;
+esac
+
diff --git a/nnstatus.sh b/nnstatus.sh
@@ -0,0 +1,107 @@
+#!/bin/sh
+# nnstatus.sh: no-nonsense status line script (Linux-specific, Xorg-specific)
+# only depends on awk (I recommend nawk/one-true-awk) to work with POSIX shells
+# and amixer to work with sound and xkb-switch to work with layouts
+# and iw + nnwifi.sh to work with wireless networks
+# can be redirected to dzen2 or other similar status apps
+# (my config is for dzen2)
+# created by Luxferre in 2023, released into public domain
+
+# configure some parameters here
+AWK_CMD=nawk # your awk engine
+DELIM=' | ' # delimiter between the fields
+SLEEP_INTERVAL=1 # data refresh interval (in seconds)
+BATDEV='BAT0' # battery device indicator, if applicable (unset to disable)
+MIXER_CHAN='Master' # ALSA channel to control
+BARFONT='FiraCode Nerd Font Ret:size=12' # font to use
+BAROPTS="-expand left -bg #00040a" # other dzen2 options
+
+BATDIR="/sys/class/power_supply/$BATDEV"
+MYPID="$$"
+SENDTRIG="kill -s usr1 $MYPID"
+
+echo "PID: $MYPID"
+
+# helper functions
+
+trap immediate_render INT USR1
+
+cpustat() { # returns: Idle NonIdle
+ $AWK_CMD 'NR==1{printf("%u %u", $5+$6, $2+$3+$4+$7+$8+$9)}' /proc/stat
+}
+
+ramstat() { # print used RAM
+ $AWK_CMD '/^MemTotal:/{mt=$2}/^Buffers:/{mb=$2}/^MemFree:/{mf=$2}\
+ /^Cached:/{mc=$2}/^Shmem:/{ms=$2}/^SReclaimable:/{msr=$2}\
+ END{d=mt-mf-mc-msr-mb+ms;if(d<1048576) printf("RAM %4.0fM",d/1024);\
+ else printf("RAM %4.2fG",d/1048576)}' /proc/meminfo
+}
+
+batstat() { # print battery status
+ local bstatus="$(cat $BATDIR/status)"
+ local bpercent="$(cat $BATDIR/capacity)"
+ local cstatus="CHG" # charging by default
+ [ "$bstatus" = "Discharging" ] && cstatus="BAT"
+ printf "%s %03u%%" "$cstatus" "$bpercent"
+}
+
+volstat() {
+ printf "%s" "^ca(1, amixer sset $MIXER_CHAN toggle && $SENDTRIG)"
+ printf "%s" "^ca(5, amixer sset $MIXER_CHAN playback 5%+ && $SENDTRIG)"
+ printf "%s" "^ca(4, amixer sset $MIXER_CHAN playback 5%- && $SENDTRIG)"
+ amixer sget $MIXER_CHAN | $AWK_CMD 'BEGIN{acc=0;c=0;con=1}\
+ /\[[0-9][0-9]*\%\]/{for(i=1;i<=NF;i++){\
+ if($i ~ /\[[0-9][0-9]*\%\]/){acc+=int(substr($i,2));c++}\
+ if($i ~ /\[off\]/){con=0}\
+ }}END{printf(con?"VOL %03u%%":"VOL OFF ",int(acc/c))}'
+ printf "%s" "^ca()^ca()^ca()"
+}
+
+kbdstat() { # keyboard layout
+ printf "%s" "^ca(1, xkb-switch -n && $SENDTRIG)"
+ printf "%s^ca()" "$(xkb-switch -p | head -c2)"
+}
+
+wlanstat() {
+ local ssid="$(iw dev $1 link | $AWK_CMD '/SSID:/{print $2}')"
+ printf "%s" "^ca(1, xterm -e doas sh nnwifi.sh conf)"
+ printf "%s: " "$1"
+ [ -z "$ssid" ] && printf "None" || printf "%s" "$ssid"
+ printf "^ca()"
+}
+
+PREVSTAT="$(cpustat)"
+
+# you can reorder the calls here
+
+render() {
+ # wifi
+ wlanstat wlan0
+ # ram
+ printf "%s" "$DELIM"
+ ramstat
+ # cpu
+ printf "%s" "$DELIM"
+ CURSTAT="$(cpustat)"
+ printf "%s %s" "$PREVSTAT" "$CURSTAT" | $AWK_CMD 'NR==1{t=$3+$4-$2-$1;i=$3-$1;printf("CPU %03d%%",100*(t-i)/t)}'
+ PREVSTAT="$CURSTAT"
+ # battery
+ [ -n "$BATDEV" ] && [ -d "$BATDIR" ] && printf "%s" "$DELIM" && batstat
+ # volume
+ printf "%s" "$DELIM"
+ volstat
+ #layout
+ printf "%s" "$DELIM"
+ kbdstat
+ # clock
+ printf "%s\n" "$DELIM$(date +'%a %b %d %H:%M')"
+}
+
+immediate_render() { # called on SIGINT and SIGUSR1
+ render | dzen2 -p $SLEEP_INTERVAL -fn "$BARFONT" $BAROPTS
+}
+
+while true; do # main loop
+ sleep $SLEEP_INTERVAL
+ render
+done | dzen2 -p -fn "$BARFONT" $BAROPTS
diff --git a/nnwifi.sh b/nnwifi.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+# Universal wifi setup for lightweight Linux systems
+# depends on wpa_supplicant and udhcpc
+# the script must be run as root
+# (can configure in /etc/doas.conf to run without password)
+# Created by Luxferre in 2023, released into public domain
+
+# config file place
+CFG="$HOME/nnwifi.conf"
+SSID_HIDDEN=1
+
+[ -f "$CFG" ] && . $CFG # source it
+
+# if "conf", run the interactive prompt
+# otherwise use the preconfigured values
+if [ "$1" == "conf" ]; then
+ printf "Interface[%s]: " "$IFACE"
+ read -r INP_IFACE
+ printf "Access point[%s]: " "$SSID"
+ read -r INP_SSID
+ printf "Password[unchanged]: "
+ read -r INP_PSK
+ printf "Primary DNS[%s]: " "$DNS_PRIMARY"
+ read -r INP_DNS_PRIMARY
+ printf "Secondary DNS[%s]: " "$DNS_SECONDARY"
+ read -r INP_DNS_SECONDARY
+ [ -n "$INP_IFACE" ] && IFACE="$INP_IFACE"
+ [ -n "$INP_SSID" ] && SSID="$INP_SSID"
+ [ -n "$INP_PSK" ] && PSK="$INP_PSK"
+ [ -n "$INP_DNS_PRIMARY" ] && DNS_PRIMARY="$INP_DNS_PRIMARY"
+ [ -n "$INP_DNS_SECONDARY" ] && DNS_SECONDARY="$INP_DNS_SECONDARY"
+ # update the config
+cat << ENDCFG > $CFG
+IFACE=$IFACE
+SSID="$SSID"
+PSK="$PSK"
+DNS_PRIMARY="$DNS_PRIMARY"
+DNS_SECONDARY="$DNS_SECONDARY"
+ENDCFG
+fi
+
+# most probably you don't need to change these two
+
+SUPFILE="/etc/wpa_supplicant.conf"
+SUPCTL="/var/run/wpa_supplicant"
+
+# first template $SUPFILE
+
+cat << ENDSUP > $SUPFILE
+ctrl_interface=$SUPCTL
+update_config=1
+network={
+ ssid="$SSID"
+ scan_ssid=$SSID_HIDDEN
+ psk="$PSK"
+}
+ENDSUP
+
+# then setup the interface
+killall udhcpc
+killall wpa_supplicant
+
+ip link set $IFACE up
+wpa_supplicant -B -i $IFACE -c $SUPFILE
+udhcpc -i $IFACE
+echo "nameserver $DNS_PRIMARY" > /etc/resolv.conf
+echo "nameserver $DNS_SECONDARY" >> /etc/resolv.conf
