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Full Discussion: Using variable inside awk
Top Forums Shell Programming and Scripting Using variable inside awk Post 302341604 by rdhanek on Thursday 6th of August 2009 09:10:23 AM
Old 08-06-2009
My basic requirement is to grep for the previous hour data. and my timestamp format is something like thisshown below.
Code:
(08/06/2009 05:48:45.992)(:)  
(08/06/2009 05:48:46.641)(:)

as there is a zero before the Hr, i can't just use
Code:
`date '+ %m/%d/%Y H'`

Instead i am using a bash file as shown below. I am able to get the date format but while using awk i am getting error. Please help me if there is any alternative for this requirement or any change needed in awk format? I am using sunOS box.
Code:
#!/bin/bash
genexpression()
{
stime=`date '+ %H'`
stime=`expr $stime \- 1`
if (( $stime < 10 ))
then
stime=0${stime}
fi
export express=`date '+%m/%d/%Y'`\ $stime
}
genexpression
echo $express
awk "/$express/{print}" test.log

 

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LEARN ABOUT DEBIAN

stime

STIME(2)						     Linux Programmer's Manual							  STIME(2)

NAME

       stime - set time

SYNOPSIS

       #include <time.h>

       int stime(time_t *t);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       stime(): _SVID_SOURCE

DESCRIPTION

       stime()	sets  the  system's  idea  of  the  time  and date.  The time, pointed to by t, is measured in seconds since the Epoch, 1970-01-01
       00:00:00 +0000 (UTC).  stime() may only be executed by the superuser.

RETURN VALUE

       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS

       EFAULT Error in getting information from user space.

       EPERM  The calling process has insufficient privilege.  Under Linux the CAP_SYS_TIME privilege is required.

CONFORMING TO

       SVr4.

SEE ALSO

       date(1), settimeofday(2), capabilities(7)

COLOPHON

       This page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

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