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Full Discussion: Issues with grep -w
Top Forums Shell Programming and Scripting Issues with grep -w Post 302343204 by rdhanek on Wednesday 12th of August 2009 02:20:34 AM
Old 08-12-2009
Hi Panyam,

here is the code that i am using to grep for 5 hrs back data. As a part of it..if it goes to the else loop it is working fine. but the data is picked by grep if the code executes th efirst pasrt of teh code(i.e, if loop suuceeds)
p.s. In both the cases i am able to echo date format correctly. Not sure this may be a space issue.

Code:
#!/bin/bash
genexpression()
{
stime=`date '+ %H'`
if (( $stime < 5 ))
then
stime=`expr $stime \+ 19`
export express=\(`TZ=CST+24 date '+ %m/%d/%Y'`\ $stime
else
stime=`expr $stime \- 5`
if (( $stime < 10 ))
then
stime=0${stime}
fi
export express=`date '+%m/%d/%Y'`\ $stime
fi
}
genexpression
export express
echo $express
t=`grep -w "$express" Service.log | wc -l`

if [ $t -ne 0 ];then
echo "suces"
else
echo "fail"
fi

 

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LEARN ABOUT MOJAVE

stime

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

NAME

       stime - set time

SYNOPSIS

       #include <time.h>

       int stime(const time_t *t);

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

       stime():
	   Since glibc 2.19:
	       _DEFAULT_SOURCE
	   Glibc 2.19 and earlier:
	       _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 be executed only 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 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

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