GNU Parallel fundamentals: how can I feed some parameter that is not in the last position? - gnu-parallel

Question

How can I parallelize ping operations like these below using GNU Parallel?
ping -c 5 -S ${AdapterIP[1]} 8.8.8.8
ping -c 5 -S ${AdapterIP[2]} 8.8.8.8
ping -c 5 -S ${AdapterIP[3]} 8.8.8.8
Problem: I am using FreeBSD, so this change is not allowed (note the host parameter to ping must be the last one) on the syntax:
ping -c 5 8.8.8.8 -S ${AdapterIP[1]}
On Linux systems I just do:
parallel ping -c 5 8.8.8.8 -S ::: "${AdapterIP[#]}"
I have tested this method on FreeBSD:
luis#Balanceador:~$ parallel ping -c 5 -S ::: "${AdapterIP[#]}" 8.8.8.8
usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]
[-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]
[-P policy] [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]
[-W waittime] [-z tos] host
ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]
[-M mask | time] [-m ttl] [-P policy] [-p pattern] [-S src_addr]
[-s packetsize] [-T ttl] [-t timeout] [-W waittime]
[-z tos] mcast-group
usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]
[-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]
[-P policy] [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]
[-W waittime] [-z tos] host
ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]
[-M mask | time] [-m ttl] [-P policy] [-p pattern] [-S src_addr]
[-s packetsize] [-T ttl] [-t timeout] [-W waittime]
[-z tos] mcast-group
usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]
[-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]
[-P policy] [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]
[-W waittime] [-z tos] host
ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]
[-M mask | time] [-m ttl] [-P policy] [-p pattern] [-S src_addr]
[-s packetsize] [-T ttl] [-t timeout] [-W waittime]
[-z tos] mcast-group
... with no luck, as can be seen.
This is probably a dumb question, but I am new to GNU Parallel. Some help, please?
For those interested, this is a possible value of the array that will feed GNU Parallel:
luis#Balanceador:~$ echo ${AdapterIP[#]}
192.168.1.254 192.168.2.254 192.168.3.254

Answer 1

This is the way I have found to specify the parameter when not in the last position (the --dry-run flag is to not execute, just test):
luis#Balanceador:~$ parallel --dry-run sudo ping -c 5 -S {1} 8.8.8.8 ::: "${AdapterIP[#]}"
sudo ping -c 5 -S 192.168.1.254 8.8.8.8
sudo ping -c 5 -S 192.168.2.254 8.8.8.8
sudo ping -c 5 -S 192.168.3.254 8.8.8.8
Note the {1}.
It can be used with multiple parameters. Example for {2}:
luis#Balanceador:~$ parallel --dry-run sudo ping -c 5 -S {1} {2} ::: "${AdapterIP[#]}" ::: 8.8.8.8 8.8.4.4
sudo ping -c 5 -S 192.168.1.254 8.8.8.8
sudo ping -c 5 -S 192.168.1.254 8.8.4.4
sudo ping -c 5 -S 192.168.2.254 8.8.8.8
sudo ping -c 5 -S 192.168.2.254 8.8.4.4
sudo ping -c 5 -S 192.168.3.254 8.8.8.8
sudo ping -c 5 -S 192.168.3.254 8.8.4.4