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[wifi-autorun-on-connect] Autorun a script when you connec to a Wifi …
…hotspot.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| #!/usr/bin/env bash | ||
| ######################################################################### | ||
| # WiFi Autorun on Connect Installer # | ||
| # # | ||
| # Automatically run a script when connected to specific # | ||
| # WiFi networks. # | ||
| # # | ||
| # Part of HopeSeekr's BashScripts Collection # | ||
| # https://github.com/hopeseekr/BashScripts/ # | ||
| # # | ||
| # Copyright © 2020 Theodore R. Smith <[email protected]> # | ||
| # GPG Fingerprint: 4BF8 2613 1C34 87AC D28F 2AD8 EB24 A91D D612 5690 # | ||
| # # | ||
| # License: Creative Commons Attribution v4.0 International # | ||
| ######################################################################### | ||
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| # Require this script to be run as the root user. | ||
| # @see https://serverfault.com/a/37836/56309 | ||
| if [[ $(/usr/bin/id -u) -ne 0 ]]; then | ||
| echo "Error: You *MUST* run this as sudo or root!" | ||
| exit 99 | ||
| fi | ||
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| if [ "$1" == "--help" ] || [ "$1" == "-h" ]; then | ||
| echo "Usage: wifi-autorun-on-startup.installer [HOTSPOT] [SCRIPT]" | ||
| exit | ||
| fi | ||
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| if [ ! -d "/etc/NetworkManager" ]; then | ||
| echo "Error: This script only works with NetworkManager." >&2 | ||
| exit 2 | ||
| fi | ||
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| WIFI_HOTSPOT="" | ||
| if [ ! -z "$1" ]; then | ||
| if [ ! -f "/etc/NetworkManager/system-connections/${1}.nmconnection" ]; then | ||
| echo "Error: NetworkManager does not know about '${1}'." >&2 | ||
| echo " Please try connecting to it first, retrying this script." >&2 | ||
| exit 3 | ||
| fi | ||
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| WIFI_HOTSPOT="$1" | ||
| fi | ||
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| if [ ! -z "$2" ] && [ ! -f "$2" ]; then | ||
| echo "Error: Cannot find a script at '${2}'." >&2 | ||
| exit 4 | ||
| fi | ||
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| echo "Warning: This script only works with NetworkManager..." | ||
| echo "" | ||
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| function selectHotspot() { | ||
| if [ -z "$WIFI_HOTSPOT" ]; then | ||
| echo "Known Hotspots:" >&2 | ||
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| HOTSPOTS=() | ||
| local index=0 | ||
| local file | ||
| for file in /etc/NetworkManager/system-connections/*.nmconnection; do | ||
| index=$(( $index + 1 )) | ||
| filename=${file##*/system-connections/} | ||
| hotspot=${filename%%.nmconnection} | ||
| HOTSPOTS+=("$hotspot") | ||
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| echo " ${index}) ${hotspot}" >&2 | ||
| done | ||
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| echo "" >&2 | ||
| echo -n "Which hotspot (1-${index})? " >&2 | ||
| read hotspot_pick | ||
| hotspot_pick=$(( $hotspot_pick - 1 )) | ||
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| echo "${HOTSPOTS[$hotspot_pick]}" | ||
| else | ||
| echo $WIFI_HOTSPOT | ||
| fi | ||
| } | ||
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| WIFI_HOTSPOT=$(selectHotspot) | ||
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| echo "Chosen wifi network: ${WIFI_HOTSPOT}" | ||
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| function assertScriptDoesNotExit() | ||
| { | ||
| SCRIPT_FILE="/etc/NetworkManager/dispatcher.d/on_connect-${1}.sh" | ||
| if [ -f "$SCRIPT_FILE" ]; then | ||
| echo "WARNING: A startup script for this connection already exists" >&2 | ||
| echo " at '${SCRIPT_FILE}'." >&2 | ||
| echo "" >&2 | ||
| echo -n "Replace it or quit? [r/Q] " >&2 | ||
|
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| local replace_or_quit | ||
| read replace_or_quit | ||
| if [ "$replace_or_quit" != "r" ]; then | ||
| echo "Quitting..." >&2 | ||
| exit 5 | ||
| fi | ||
| fi | ||
| } | ||
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| assertScriptDoesNotExit "${WIFI_HOTSPOT}" | ||
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| function grabConnectionUUID() | ||
| { | ||
| local nm_conn_file="/etc/NetworkManager/system-connections/${1}.nmconnection" | ||
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| if [ ! -f "$nm_conn_file" ]; then | ||
| echo "Error: NetworkManager does not know about '${1}'." >&2 | ||
| echo " Please try connecting to it first, retrying this script." >&2 | ||
| exit 3 | ||
| fi | ||
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| CONNECTION_UUID=$(grep uuid= "$nm_conn_file" | sed 's/^uuid=//') | ||
| echo "Connection UUID: $CONNECTION_UUID" | ||
| } | ||
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| grabConnectionUUID "$WIFI_HOTSPOT" | ||
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| ############################################################# | ||
| # Grab the text from an existing file -or- user input... # | ||
| # # | ||
| # Copyright © 2020 Theodore R. Smith # | ||
| # License: Creative Commons Attribution v4.0 International # | ||
| # From: https://github.com/hopeseekr/BashScripts/ # | ||
| # @see https://stackoverflow.com/a/64486155/430062 # | ||
| ############################################################# | ||
| function grabDocument() | ||
| { | ||
| if [ ! -z "$1" ] && [ -f "$1" ]; then | ||
| echo $(<"$1") | ||
| else | ||
| echo "" >&2 | ||
| echo "Please type/paste in bash script you wish to be run when NetworkManager connects to '${WIFI_HOTSPOT}'." >&2 | ||
| echo "You should NOT start with '#!/usr/bin/env bash'..." >&2 | ||
| echo "Press CTRL+D when finished." >&2 | ||
| echo "" >&2 | ||
|
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| # Read user input until CTRL+D. | ||
| # @see https://stackoverflow.com/a/38811806/430062 | ||
| readarray -t user_input | ||
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| # Output as a newline-dilemeted string. | ||
| # @see https://stackoverflow.com/a/15692004/430062 | ||
| printf '%s\n' "${user_input[@]}" | ||
| fi | ||
| } | ||
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| N=$'\n' | ||
| SCRIPT="#!/usr/bin/env bash${N}" | ||
| SCRIPT+="if [[ CONNECTION_UUID=\"${CONNECTION_UUID}\" ]]; then${N}" | ||
| SCRIPT+="$(grabDocument "$2")${N}" | ||
| SCRIPT+="fi${N}" | ||
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| # Preserve white spaces and newlines. | ||
| # @see https://stackoverflow.com/a/18018422/430062 | ||
| echo "$SCRIPT" > "$SCRIPT_FILE" | ||
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| chmod 0755 "$SCRIPT_FILE" | ||
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| echo "" | ||
| echo "Success! An autorun on connect script has been successfully installed for ${WIFI_HOTSPOT}." |