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Old 04-19-2001, 07:33 AM   #1
Sharmila Inamdar
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I have an application program of 34K size. I wanted the prog to get loaded after normal boot-up and keep running in background mode.

I am using redhat 6.2,kernel 2.2.14 at runlevel 3. So I appended the command with full pathname for background running in /etc/rc.d/rc.local.

At boot-time what I see is part of the prog gets executed before login and then there is no trace or further execution. ps -aux simply doesn't show the prog. It is being terminated.

Is it a memory problem?

I've similar program of 17k size (but nothing to do with files) which works well as expected.
So , is it got something to do with file operations?

pls help.

Old 04-19-2001, 07:38 PM   #2
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It sounds like your process is either not starting or dying after startup. What happens when you start the process in the backgroud as root on the command line?

Remember the following when coding daemons:[list=1][*] fork and exit parent[*] setsid() ( become session leader )[*] chidr("/") ( change dir to root )[*] umask(0) ( clear file mode mask )[/list=1]
Old 04-20-2001, 12:14 AM   #3
Sharmila Inamdar
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Automatic Program loading at boot-up

At command prompt the program works perfectly well in background mode.i.e my_program &

But if excuted from rc.local , it starts execution ,prints few messages which are part of the program. One more observation I would like to share is, it stops execution at the end of return of a function call. This function is defined as extern to the calling program. The program is in C.

Secondly, I've not really used any fork,setsid sequence. Can you pls. suggest me some reference to get basic ideas of these daemon concepts?

Thanks a lot



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