I have a small script which reads my IP address from an URL and then sets it :
Code:
#!/bin/bash
MAC_ADDR=$(ifconfig eth0 | sed -n 's/.*HWaddr \([a-f0-9:]*\).*/\1/p')
IP=($(curl http://169.254.169.254/latest/meta-data/network/interfaces/macs/$MAC_ADDR/local-ipv4s))
for ip in ${IP[@]:1}; do
echo "Adding IP: $ip"
ip addr add dev eth0 $ip/24
done
I saved it in a file script.sh with exec rights. Now I am trying to put it under /etc/rc.local to run at startup.
My rc.local looks like :
Code:
root@ip-10-0-0-184:~# cat /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
sh /root/script.sh
exit 0
When I run it via ./script.sh all works fine. When I try to run it via sh I get the following
dash is supposed to be POSIX-compliant but it still seems that it does not have all of the features that bash has, the $( ) construct is an example. You need to use backticks
Example:
Code:
`my command`
# instead of
$( my command)
PS: I don't use dash, but you should be aware of the gotchas if you choose to keep using it. dash is not meant as a one-to-one replacement for bash.
This User Gave Thanks to jim mcnamara For This Post:
dash is supposed to be POSIX-compliant but it still seems that it does not have all of the features that bash has, the $( ) construct is an example. You need to use backticks
According to its documentation, dash does support the modern, POSIX-compliant $(...) command substitution syntax.
I don't use dash either, but I suspect the problem lies with the parentheses surrounding the command substitution, which look like a bash list/array assignment.
What would be the fastest way to sort this out ?
Tried actually the following :
Code:
#!/bin/bash MAC_ADDR=`ifconfig eth0 | sed -n 's/.*HWaddr \([a-f0-9:]*\).*/\1/p'` IP=`(curl http://169.254.169.254/latest/meta-data/network/interfaces/macs/$MAC_ADDR/local-ipv4s)` for ip in ${IP[@]:1}; do echo "Adding IP: $ip" ip addr add dev eth0 $ip/24 done
07-01-2013
