nigel@cmsfl@labtam.oz (Nigel Harwood) (07/13/90)
Folks, I have a strange problem which I hope someone can
suggest some new approaches to solving.
A bourne shell script is exiting prematurely.
Once the script has run script1.sh it successfully writes
to the log. Next is a test for an error log which usually
does not exist.
ABC does not appear in the log and script2.sh is not run.
The exit status from the script is 0.
This is happening once or twice out of 350 systems performing
this function which is done once a day.
It is my understanding that the only way for a script to prematurely
end is by :
i) doing an exit
ii) doing an exec
iii) a shell syntax error
iv) receiving a kill signal
I did not think that it was possible for a program or other script
being invoked to cause the parent script to fail.
If this is so then I should look through the other 4 alternatives.
Can't be i) because an exit is not done.
Can't be ii) because an exec is not done.
Can't be iii) because I get an exit status of zero (or is this still
a possibility ?).
Can't be iv) for the same reason as iii).
To add to all of this the script in question has not been recently
changed.
The only other thing I can think of is that the ERRLOG variable
which is set to a literal value is somehow being corrupted and
causing the script to have a syntax error.
But even if this was the case I would still expect a non-zero
return code.
Help ?
------------------------------
LOG=abcde
ERRLOG=fghij
cprog1
if [ $? = 0 ]; then
cprog2
if [ $? = 0 ]; then
cprog3
script1.sh
echo "XYZ" >> $LOG # This does appear in "abcde"
if [ -s $ERRLOG ]; then
cat $ERRLOG >> $LOG # This does not appear in "abcde"
fi
rm -f $ERRLOG
fi
fi
echo "ABC" >> $LOG # This does not appear in the "abcde"
script2.sh
exit 0
------------------------------
--
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