different behaviour in fg and bg

Applications Programming
1

fg = foreground bg = background
I have a cobol program that I start with a very simple script.
The script is not at fault as it has not changed and the program worked in fg and bg before.
I have altered the logging in the program and moved my cursor declare to working storage.
The program runs as a daemon sleeping and checking every minute if it needs to run.
now when I run in foreground - it works creating the log file and reading the records from the oracle database
when run ./start_script& (in background)
no log file in /tmp
no records selected from oracle although in exact state as those set for foreground test?
Any help appreciated

Regards
Bruce

2

What happens when you execute fg after running the program in the background? Does it start going?

3

I will try that on Monday as I am off home now thanks for the reply

4

When started in bg the log file is not created database not accessed
When brought into fg then the program runs exactly as expected

5

And nothing else changed on your system? What OS and more specifically what cobol ?

6

nothing else changed

(3,audev)/usr4/i/xj410235/bin $ cd /usr1/au/scripts
(3,audev)/usr1/au/scripts $ ./xjr1405_start &
[1] 29330
(3,audev)/usr1/au/scripts $ cd /tmp
[1] + Stopped (tty output) ./xjr1405_start &
(3,audev)/tmp $ ls -lrt XJ* | grep 'Dec 15'
-rw-rw-rw- 1 G774AHE users 641 Dec 15 10:16 XJR1405_20111215093926
.log
-rw-rw-rw- 1 G774AHE users 7623 Dec 15 10:25 XJR1405_20111215093429
.log
-rw-rw-rw- 1 G774AHE users 11137 Dec 15 11:17 XJR1405_20111215103729
.log
-rw-rw-rw- 1 G774AHE users 33136 Dec 15 11:36 XJR1405_20111215112743
.log
(3,audev)/tmp $ ps -ef | grep xj
G774AHE 199 27651 1 13:19:14 ttyp8 0:00 grep xj
G774AHE 29336 29330 0 13:18:05 ttyp8 0:00 /usr/local/bin/oraclerun /usr1/a
u/bin/xjr1405
G774AHE 29330 27651 0 13:18:05 ttyp8 0:00 /bin/ksh ./xjr1405_start

unix is HP-UX; cobol is microfocus cobol server express v5.0; Oracle 9i

This is repeatable - but if started in fg and ctrl-Z issued then process remains functional

7

I dont think it has to do with cursor declaration, but what about your alteration can you say more?