Hi,
I've just to report a memory leak caused by a shell function which
uses an echo as last line in the shell function.
-----------------------------------------------------------------------
#!/usr/bin/ksh
PATH=/bin:/usr/bin:/usr/sbin:/sbin
# Description: Get the interval to sample information
# Output: interval seconds
getSampleInterval()
{
# Example for this arithmetic, suppose the next time is 45 second
# If current second is in [35, 40], such as 38,
# the interval should be 10 - 38 % 10 + 5 = 7
# If current second is in [41, 45], such as 42,
# the interval should be 10 - 42 % 10 - 5 = 3
# If the current second is 45, the interval should be 10 - 45 % 10 - 5 = 0
typeset -ilu _currSec=$(date +%S)
typeset -ilu _interval
((_interval=10-(_currSec%10)))
if ((_interval >= 5))
then
((_interval=_interval-5))
else
((_interval=_interval+5))
fi
echo $_interval
}
typeset -ilu times=0
typeset -ilu interval
while [ 1 -eq 1 ]
do
# First, get the interval to check
interval=$(getSampleInterval)
sleep $interval
((times++))
state=$(egrep '^VmData|^VmRSS|^VmSize' </proc/$$/status)
[ "$state" != "$oldstate" ] && echo $state
oldstate="$state"
done
-----------------------------------------------------------------------
here the shell function getSampleInterval cause the mem leak,
using a simply return/exit value does not show this behaviour.
Werner
--
"Having a smoking section in a restaurant is like having
a peeing section in a swimming pool." -- Edward Burr
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