mirror of
https://github.com/iiab/iiab.git
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74 lines
3.4 KiB
Bash
Executable file
74 lines
3.4 KiB
Bash
Executable file
#!/bin/bash -x
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# Small daemon to identify this machine to the OpenVPN server
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# SEE /usr/bin/iiab-support for local_vars.yml var extraction explanation
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# EMULATE ANSIBLE: but additionally Force Empty String Where Nec, e.g. whether
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# local_vars.yml sets openvpn_handle to "" (or worst case null, or not at all!)
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HANDLE=$(grep "^openvpn_handle:\s" /etc/iiab/local_vars.yml | tail -1 | sed "s/^openvpn_handle:\s\+//; s/#.*//; s/\s*$//; s/^\(['\"]\)\(.*\)\1$/\2/")
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# ALSO GO 1 STEP FURTHER THAN ANSIBLE: convert remaining spaces to underscores,
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# for OpenVPN server. iiab-support emulates this, to help folks understand.
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HANDLE=${HANDLE// /_} # Same as "s/ /_/g"
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# Likewise empty string is the worst case, e.g. if file doesn't exist.
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# If $HANDLE is "", OpenVPN server tries to use the 1st 6 chars of UUID,
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# e.g. e1a3d4 from e1a3d4e2-2d1a-4f37-9ba0-e836d7c8e3ca
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# SEE "AUGUST 2018 - AUGUST 2021" RECAP ON TOP OF: roles/openvpn/tasks/main.yml
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UUID=$(cat /etc/iiab/uuid)
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/usr/bin/ncat -l -k -p1705 --exec "/bin/echo HANDLE = $HANDLE|UUID = $UUID" &
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# 2021-08-18: Let's finally do it 3 years lster, simplifying from 4 places to 1
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# at long last. Per SSOT (single source of truth).
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# #HANDLE=
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# #UUID=
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# #if [ -f /etc/iiab/openvpn_handle ]; then
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# # Option #1: Source directly from /etc/iiab/local_vars.yml in future?
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# # Option #2
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# HANDLE=$(cat /etc/iiab/openvpn_handle) # Sets to "" if file doesn't exist (error is ok!)
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# # Sourcing a variable from ~4 different places is a recipe for total confusion
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# # (or worse!) Far better to make variable openvpn_handle and file
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# # /etc/iiab/openvpn_handle "obligatory" (EMPTY STRING "" IS TOLERATED, IN WHICH
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# # CASE OPENVPN SERVER TRIES TO USE /etc/iiab/uuid BELOW, IN LIEU OF HANDLE...)
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# # CLARIF: "systemctl restart openvpn" still works tolerably even if the above
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# # is defied, auto-starting child service openvpn@xscenet per usual
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# # (e.g. if /etc/iiab/openvpn_handle is deleted by accident!)
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# #else
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# # # Option #3: Dangerous to invoke hypothetical variables :(
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# # source {{ iiab_env_file }}
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# # # Option #4: CAUSED FAILURES IN AUGUST 2018, invoking stale variable from {{ iiab_ini_file }}, but safer now that relegated to #4 ?
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# # if [ -z "$HANDLE" ]; then
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# # HANDLE=`cat {{ iiab_ini_file }} | gawk \
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# # '{ if((toupper($1) == "HANDLE") && ($2 == "=")) { print $3;}}'`
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# # fi
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# #fi
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# HANDLE=${HANDLE// /_} # Change all spaces to underscores
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# #if [ -f /etc/iiab/uuid ]; then
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# UUID=$(cat /etc/iiab/uuid) # Sets to "" if file doesn't exist (error is ok!)
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# #fi
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# SERVER=/usr/bin/ncat
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# #ID=$(printf "HANDLE = %s|UUID = %s" $HANDLE $UUID)
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# #ID=$(echo "HANDLE = ${HANDLE}|UUID = ${UUID}")
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# ID=$(echo "HANDLE = $HANDLE|UUID = $UUID")
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# # August 2018: Removal of trailing '|' tested on Raspbian, Ubuntu 18.04 & Ubuntu 16.04
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# #ID=`printf "HANDLE = %s|UUID = %s|" $HANDLE $UUID`
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# # Start the daemon which will serve the handle on demand
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# {% if is_debuntu %}
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# $SERVER -l -k -p1705 --exec "/bin/echo $ID" &
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# # 2020-11-23: USE 1 LINE INSTEAD OF 9 LINES, IF WE MANDATE debuntu:
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# #/usr/bin/ncat -l -k -p1705 --exec "/bin/echo HANDLE = $HANDLE|UUID = $UUID" &
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# {% else %}
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# source /etc/init.d/functions
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# PID_FILE=/var/run/openvpn/announce.pid
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# daemon --pidfile=${PID_FILE} $SERVER "-l -k -p1705 --exec \"/usr/bin/echo $ID\"" &
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# #daemon --pidfile=${PID_FILE} $SERVER "-l -k -p1705 --exec \"/usr/bin/echo $(printf 'HANDLE = %s|UUID = %s' $HANDLE $UUID)\"" &
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# {% endif %}
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