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Full Discussion: While loop - The sum seems to be local
Top Forums Shell Programming and Scripting While loop - The sum seems to be local Post 302178596 by eagercyber on Wednesday 26th of March 2008 02:02:35 AM
Old 03-26-2008
While loop - The sum seems to be local
Hi,

I am trying to extracting the sum of all varibles listed in a file.

The code is as follows


##### FILE1 ########

Value1:2
Value2:2
Value3:6
Value4:5

##### shell script ######


#!/bin/sh

total=0

cat FILE1 | \
while read line
do
count=`echo $line | awk -F":" '{print $NF}'`
total=`expr $total + $count`
echo $total
done
echo $total

I get the o/p as

2
4
10
15
0 => wrong o/p for total

Inside the loop the variable is getting updated. But once out, the variable 'total' is back to 0.

Any way for solving this?
 

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LEARN ABOUT OPENSOLARIS

auditstat

auditstat(1M)						  System Administration Commands					     auditstat(1M)

NAME

       auditstat - display kernel audit statistics

SYNOPSIS

       auditstat [-c count] [-h numlines] [-i interval] [-n] [-v]

DESCRIPTION

       auditstat displays kernel audit statistics. The fields displayed are as follows:

       aud     The total number of audit records processed by the audit(2) system call.

       ctl     This field is obsolete.

       drop    The total number of audit records that have been dropped. Records are dropped according to the kernel audit policy. See auditon(2),
	       AUDIT_CNT policy for details.

       enq     The total number of audit records put on the kernel audit queue.

       gen     The total number of audit records that have been constructed (not the number written).

       kern    The total number of audit records produced by user processes (as a result of system calls).

       mem     The total number of Kbytes of memory currently in use by the kernel audit module.

       nona    The total number of non-attributable audit records that have been constructed. These are audit records that are not attributable to
	       any particular user.

       rblk    The total number of times that the audit queue has blocked waiting to process audit data.

       tot     The total number of Kbytes of audit data written to the audit trail.

       wblk    The total number of times that user processes blocked on the audit queue at the high water mark.

       wrtn    The  total  number  of audit records written. The difference between enq and wrtn is the number of outstanding audit records on the
	       audit queue that have not been written.

OPTIONS

       -c count       Display the statistics a total of count times. If count is equal to zero, statistics are	displayed  indefinitely.   A  time
		      interval must be specified.

       -h numlines    Display a header for every  numlines of statistics printed. The default is to display the header every 20 lines. If numlines
		      is equal to zero, the header is never displayed.

       -i interval    Display the statistics every interval where interval is the number of seconds to sleep between each collection.

       -n	      Display the number of kernel audit events currently configured.

       -v	      Display the version number of the kernel audit module software.

EXIT STATUS

       auditstat returns 0 upon success and 1 upon failure.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       auditconfig(1M), praudit(1M), bsmconv(1M), audit(2), auditon(2), attributes(5)

NOTES

       The functionality described in this man page is available only if the Basic Security Module (BSM) has been enabled.  See   bsmconv(1M)  for
       more information.

SunOS 5.11							    11 Feb 2008 						     auditstat(1M)
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