Hi Linux Experts.
Since years I am running an fpc program as a kind of daemon on a PC
Linux server.
I simply defined a "respawn" line in /etc/inittab and with any start of
the server, the program happily automatically runs as a daemon.
Now I migrated the the PC Linux server to an ARM based "QNAP" NAS box,
which comes with a propriety - but rather normal - Linux distribution.
Hence I compiled the program with the appropriate ARM fpc and it happily
runs on this box, as well.
Now the problem is that I can't edit the inittab file on this box, as it
is in a RAM file system that gets recreated with any start.
But I was able to install an init.d system that allows for running any
script after booting. Thus I need to find a way to run my program as a
deamon.
Of course I do know about daemonapp.pp and with that, I suppose I could
easily have the program daemonize itself. But the program is written in
a way that it exits whenever some kind of error happens (and this does
occur, as it accesses multiple sites via TCP/IP. So it relies on the
"respawn" feature, inittab provides.
I would appreciate any idea on how to create some kind of "respawn"
algorithm within this program or with a second program - maybe just a
script. In fact I could use "cron" for this, as happily the system does
allow me to edit crontab (which here actually is /etc/config/crontab and
the /etc/config/ is symlinked to a directory residing in a special
location on a hard disk.
-Michael
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