I finally found the solution to this problem by doing a simple 'trick'.

pkgadd has an -a option which allows to use your own admin file to control the process. The format of this file is similar to the one below.

instance=overwrite
partial=nocheck
runlevel=nocheck
idepend=nocheck
rdepend=nocheck
space=nocheck
setuid=nocheck
conflict=nocheck
action=nocheck
basedir=default

The 'action=nocheck' line tells to the command to bypass the questions in order to automate the execution.

The problem is that the first question which needs an 'all' answer (instead of 'y') cannot be bypassed by this command.

What I did was to create two files. The first one had the above 'admin file' structure and the second one had only one line with the word 'all'.

echo "mail=
instance=overwrite
partial=nocheck
runlevel=nocheck
idepend=nocheck
rdepend=nocheck
space=nocheck
setuid=nocheck
conflict=nocheck
action=nocheck
basedir=default" > $NOASK_FILE

echo "all" > $INPUT_FILE


By using the following command:


pkgadd -a $NOASK_FILE -d [package-path] < $INPUT_FILE

the package was added automatically without any user interaction.

I hope this helps others that will face the same issue in the future.

Thanks for your replies.