Use of expr to calc differenc ein to epoch values Post: 303016661

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Top Forums Shell Programming and Scripting Use of expr to calc differenc ein to epoch values Post 303016661 by jonnyd on Tuesday 1st of May 2018 07:33:55 PM

05-01-2018

Registered User

Use of expr to calc differenc ein to epoch values

Hi folks,

I have a script where i am trying to calc the difference between two epoch dates and then have a condition based on the resultant value.

When I run the script it keeps complaining;

Code:

expr: syntax error
./testdiff.sh: line 11: syntax error in conditional expression
./testdiff.sh: line 11: syntax error near `-a'
./testdiff.sh: line 11: `if [[ ${DATE_DIFF} -gt 4000 -a ${DATE_DIFF} -lt 6000 ]]'

Code:

#!/bin/bash

export CHECK_DATE_1=`date +%s`
export FILE1=/tmp/longrunmon.out

export DATE_DIFF=`expr ${CHECK_DATE_1} - ${INSERT_TIME}`

while IFS=, read INSTANCE SESS_COUNT INSERT_TIME
do

if [[ ${DATE_DIFF} -gt 4000 -a ${DATE_DIFF} -lt 6000 ]]
then
echo Critical Alert: $DATE_DIFF

elif [[ ${DATE_DIFF} -lt 600 ]]
then
echo Major Alert: $DATE_DIFF

#else
#echo not less than 600
#echo instance: $INSTANCE
#echo session_count: $SESS_COUNT
#echo date_diff: $DATE_DIFF
#echo insert_time: $INSERT_TIME
#echo check_date: $CHECK_DATE_1

fi
done < ${FILE1}

The content of /tmp/longrunmon.out

is;

testinst,10,1525186184

Any help much appreciated.

jd

Last edited by Scrutinizer; 05-02-2018 at 12:33 AM.. Reason: Additional code tags

jonnyd

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noecho

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include  -L	/usr/xpg4/lib 
	-R  /usr/xpg4/lib  -lcurses  [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.11							    5 Jun 2002							    echo(3XCURSES)