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Full Discussion: False alerts
Top Forums Shell Programming and Scripting False alerts Post 302992436 by drysdalk on Friday 24th of February 2017 04:40:02 PM
Old 02-24-2017
Hi,

(Edit: forgot to include the date in the mail)

Here's a version of your script that's as streamlined as I've been able to make it:

Code:
#!/bin/bash

hostname="`/bin/hostname`"
date="`/bin/date`"
load="`/usr/bin/sar -P ALL 10 1 | /usr/bin/awk '$1 == "Average:" && $2 == "all" {print 100-$NF}'`"

threshold="90.00"
recipient="unixforum@localhost"
subject="Load alert on host $hostname"
body="Load is $load, date is $date"

if [[ "$load" > "$threshold" ]]
then
        echo "$body" | /usr/bin/mail -s "$subject" "$recipient" >/dev/null 2>/dev/null
        exit 1
else
        exit 0
fi

Again in my own local tests this worked fine, but then so did your original. You may need to amend paths to things like sar, awk, etc (it's always a good idea to use fully-qualified paths in scripts that will be run via crontab).

Hope this helps.
Last edited by drysdalk; 02-24-2017 at 05:57 PM..
This User Gave Thanks to drysdalk For This Post:
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LEARN ABOUT SUNOS

setusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

       /bin/bash		  /bin/csh
       /bin/jsh 		  /bin/ksh
       /bin/pfcsh		  /bin/pfksh
       /bin/pfsh		  /bin/sh
       /bin/tcsh		  /bin/zsh
       /sbin/jsh		  /sbin/pfsh
       /sbin/sh 		  /usr/bin/bash
       /usr/bin/csh		  /usr/bin/jsh
       /usr/bin/ksh		  /usr/bin/pfcsh
       /usr/bin/pfksh		  /usr/bin/pfsh
       /usr/bin/sh		  /usr/bin/tcsh
       /usr/bin/zsh		  /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

SunOS 5.10							    30 Aug 2004 						  getusershell(3C)
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