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Just remove the -s option since we're redirecting anyway
author Steve Huston <huston@princeton.edu>
date Thu, 25 Apr 2024 13:59:42 -0400
parents 6dc992e4fc4a
children
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df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
Steve Huston <huston@srhuston.net>
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1 #!/usr/bin/env bash
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2
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3 # Check to see if we're at home - does our externally routable IP address
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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4 # match the one on my home network. This should be fast, and needs to be
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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5 # portable so it works in multiple ways, but if everything else fails we'll
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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6 # return false which should still allow things to work.
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7
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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8 # Logic swap for negating outputs
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9 on=0
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10 off=1
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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11 if [[ "$1" == "--not" ]] ; then
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12 shift
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13 on=1
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14 off=0
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15 fi
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16
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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17 # Start by getting our current IP, this is surprisingly easy thanks to Amazon
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
Steve Huston <huston@srhuston.net>
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18 MYIP=`curl -s checkip.amazonaws.com`
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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19
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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20 # Now how to get the home IP.. let's loop through ways it's possible
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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21 HOMEDNS="b6800200.eero.online"
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22
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23 if which getent awk > /dev/null 2>&1 ; then
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df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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24 HOMEIP=`getent ahostsv4 $HOMEDNS | awk '{print $1; exit}'`
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25 elif which dig > /dev/null 2>&1 ; then
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df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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parents:
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26 HOMEIP=`dig +short $HOMEDNS`
df0b24d4fabd Think I'm ready to check this all in now; shared dotfiles that can be "sent"
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27 else
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28 exit $off
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29 fi
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31 [[ $MYIP == $HOMEIP ]] && exit $on || exit $off