post-config bash script does not start executable file properly

In Ninux wireless community we use OLSRd to handle routes among wireless nodes.

To install olsrd into EdgeRouters, you have to:

$ sudo -i
# echo 'deb http://ftp.de.debian.org/debian/ wheezy main contrib
non-free' > /etc/apt/sources.list
# export DEBIAN_FRONTEND=noninteractive
# apt-get update && apt-get install wget
# cd /tmp
# wget http://test.ninux.org/~clauz/edgerouter/olsrd_0.9.0.3_mips.deb
# wget http://test.ninux.org/~clauz/edgerouter/olsrd-plugins_0.9.0.3_mips.deb
# dpkg -i olsrd_0.9.0.3_mips.deb olsrd-plugins_0.9.0.3_mips.deb

Then, the following config files, customized to reflect user needs, need to be inserted in the following paths

/config/scripts/post-config.d/boot.sh
/etc/olsrd/launch4.sh
/etc/olsrd/olsrd.conf

For the moment let's forget the ipv6 (launch6.sh) part, because it is not necessary to solve my problem.

Once you have configured VLANs, and you reboot the machine, you should see something like (keep in mind the bold line)

root@ubnt:~# ps aux | grep olsr
root      1599  0.0  0.0   3012  1164 pts/0    S    15:46   0:00 /bin/bash /etc/olsrd/launch4.sh
root      1600  0.0  0.0   3012  1172 pts/0    S    15:46   0:00 /bin/bash /etc/olsrd/launch6.shroot      1602  0.0  0.0   2636  1072 pts/0    S    15:46   0:00 /usr/sbin/olsrd -f /etc/olsrd/olsrd.conf -d 0 -nofork

me instead, I get

ubnt@ubnt:~$ ps aux | grep olsr 
root      1446  0.0  0.0   3008  1168 ?        S    16:24   0:00 /bin/bash /etc/olsrd/launch4.sh

so there is no

root      1602  0.0  0.0   2636  1072 pts/0    S    15:46   0:00 /usr/sbin/olsrd -f /etc/olsrd/olsrd.conf -d 0 -nofork

If I move the

/config/scripts/post-config.d/boot.sh

file to another position, for example

/home/ubnt/boot.sh

and I do

# sh /home/ubnt/boot.sh

then I correctly get

root@ubnt:~# ps aux | grep olsr
root      1599  0.0  0.0   3012  1164 pts/0    S    15:46   0:00 /bin/bash /etc/olsrd/launch4.sh
root      1600  0.0  0.0   3012  1172 pts/0    S    15:46   0:00 /bin/bash /etc/olsrd/launch6.sh
root      1602  0.0  0.0   2636  1072 pts/0    S    15:46   0:00 /usr/sbin/olsrd -f /etc/olsrd/olsrd.conf -d 0 -nofork

so I really do not understand where the problem is.

Files permissions

root@ubnt:~# ls -latr /config/scripts/post-config.d/boot.sh 
-rwxr-xr-x    1 ubnt     users         1333 Oct 24 15:37 /config/scripts/post-config.d/boot.sh

root@ubnt:~# ls -latr /etc/olsrd/
total 36
-rwxr-xr-x    1 ubnt     users           43 Jan  1  2015 6olsr
-rwxr-xr-x    1 ubnt     users           49 Jan  1  2015 4olsr
-rw-r--r--    1 root     root          1474 Nov 27  2015 olsrd.pud.position.conf
-rw-r--r--    1 root     root           189 Nov 27  2015 olsrd.sgw.speed.conf
-rw-r--r--    1 root     root           198 Oct 23 19:59 olsrd.conf
-rwxr-xr-x    1 ubnt     users          104 Oct 23 20:10 launch4.sh
-rwxr-xr-x    1 ubnt     users          105 Oct 23 20:10 launch6.sh
drwxr-xr-x    1 root     root          4096 Oct 24 10:00 .
drwxrwxr-x    1 root     vyattacf      4096 Oct 24 16:24 ..

# cat /config/scripts/post-config.d/boot.sh

root@ubnt:~# cat /config/scripts/post-config.d/boot.sh 
#!/bin/sh

/etc/olsrd/launch4.sh &
/etc/olsrd/launch6.sh &

# tables:
#110 local routes
#111 RtTable
#112 RtTableDefault
#113 Special Table for /1
#114 blackhole table

sleep 5

#Copy local routes only from table main 254 to table 110
ip route show table 254 | grep -Ev ^default | grep -Ev ^blackhole | while read ROUTE ; do
MASK=`echo "${ROUTE}" | awk '{print $1}' | awk -F/ '{print $2}'`
if [ "$MASK" -ne 16 ] ; then
ip route add table 110 $ROUTE
fi
done

#First evaluate local routes
ip rule add from all lookup 110 pref 3

#Private routes to OLSR table
ip rule add to 10.0.0.0/8 table 111 pref 4
ip rule add to 172.16.0.0/12 table 111 pref 4
ip rule add to 192.168.0.0/16 table 111 pref 4

#Ninux IP Addresses to OLSR table
ip rule add to 176.62.53.0/24 table 111 pref 4

#Evaluate blackholes
ip rule add from all table 114 pref 5

#Send traffic of public address to BGP border routers
ip rule add from 176.62.53.0/24 table 113 pref 6

#Lookup default route first from user and then from OLSR
ip rule add from all lookup 254 pref 7
ip rule add from all lookup 112 pref 8

#Blackhole private aggregates
ip route add blackhole 10.0.0.0/8 table 114
ip route add blackhole 172.16.0.0/12 table 114
ip route add blackhole 192.168.0.0/16 table 114

#Blackhole Ninux aggregate
ip route add blackhole 176.62.53.0/24 table 114

exit 0

# cat /etc/olsrd/olsrd.conf

root@ubnt:~# cat /etc/olsrd/olsrd.conf 
LinkQualityFishEye             0

Hna4
{
        10.120.2.0 255.255.255.0
        10.120.3.0 255.255.255.0
}
Interface "eth0.3"
{
}

LoadPlugin "olsrd_httpinfo.so.0.1"
{
}

LoadPlugin "olsrd_jsoninfo.so.0.0"
{
}

# cat /etc/olsrd/launch4.sh

root@ubnt:~# cat /etc/olsrd/launch4.sh 
#!/bin/bash

while true; do
    /usr/sbin/olsrd -f /etc/olsrd/olsrd.conf -d 0 -nofork
    sleep 60
done