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Full Discussion: "integer expression expected" error with drive space monitoring script
Operating Systems Linux Fedora "integer expression expected" error with drive space monitoring script Post 302384397 by wbdevilliers on Tuesday 5th of January 2010 06:57:49 AM
Old 01-05-2010
"integer expression expected" error with drive space monitoring script
Hi guys,

I am still kinda new to Linux.

Script template I found on the net and adapted for our environment:

Code:
#!/bin/sh
#set -x
ADMIN="admin@mydomain.com"
ALERT=10
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
  #echo $output
  usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  partition=$(echo $output | awk '{ print $2 }' )
  if [ $usep -ge $ALERT ]; then
    echo "Running out of space \"$partition $usep% used\" on $(hostname) as on $(date)" |
     mail -s "Alert:$(hostname) almost out of disk space $usep% used" $ADMIN
  fi
done

I get the following errors:

Code:
./monitor_EMAIL.sh: line 12: [: /dev/mapper/VolGroup00-LogVol00: integer expression expected
./monitor_EMAIL.sh: line 12: [: /: integer expression expected

This the output I get with the "set -x" enabled:

Code:
[root@s-webservice scripts]# ./monitor_EMAIL.sh
./monitor_EMAIL.sh: line 12: [: /dev/mapper/VolGroup00-LogVol00: integer expression expected
./monitor_EMAIL.sh: line 12: [: /: integer expression expected
[root@host scripts]# vim monitor_EMAIL.sh
[root@host scripts]# ./monitor_EMAIL.sh
+ ADMIN=admin@mydomain.com
+ ALERT=10
+ df -l
+ grep -vE '^Filesystem|tmpfs|cdrom'
+ awk '{ print $5 " " $1 }'
+ read output
++ echo /dev/mapper/VolGroup00-LogVol00
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=/dev/mapper/VolGroup00-LogVol00
++ echo /dev/mapper/VolGroup00-LogVol00
++ awk '{ print $2 }'
+ partition=
+ '[' /dev/mapper/VolGroup00-LogVol00 -ge 10 ']'
./monitor_EMAIL.sh: line 12: [: /dev/mapper/VolGroup00-LogVol00: integer expression expected
+ read output
++ echo / 149186740
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=/
++ echo / 149186740
++ awk '{ print $2 }'
+ partition=149186740
+ '[' / -ge 10 ']'
./monitor_EMAIL.sh: line 12: [: /: integer expression expected
+ read output
++ echo 16% /dev/sda1
++ awk '{ print $1}'
++ cut -d% -f1
+ usep=16
++ echo 16% /dev/sda1
++ awk '{ print $2 }'
+ partition=/dev/sda1
+ '[' 16 -ge 10 ']'
++ hostname
++ hostname
++ date
+ echo 'Running out of space "/dev/sda1 16% used" on host as on Tue Jan  5 12:34:16 SAST 2010'
+ mail -s 'Alert:host almost out of disk space 16% used'
admin@mydomain.com
+ read output

I set the ALERT level low just to test the script.
This is on Fedora Core 5.
The same script works fine on all other versions like CentOS5, Redhat etc...
Last edited by pludi; 01-05-2010 at 08:02 AM.. Reason: code tags, please...
 

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LEARN ABOUT DEBIAN

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.
	      Please notice this option isn't related to the terminal length as in a "80 culums terminal".

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do right to left (RTL) layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter and A4. Default is A4.

       Postscript points
	      Each postscript point equals to 1/72 of an inch. 36 points are 1/2 of an inch.

       --bottom-margin=bm
	      Set bottom margin. Default is 36 postscript points.

       --top-margin=tm
	      Set top margin. Default is 36 postscript points.

       --left-margin=lm
	      Set left margin. Default is 36 postscript points.

       --right-margin=rm
	      Set right margin. Default is 36 postscript points.

       --gutter-width=gw
	      Set gutter width. Default is 40 postscript points.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)
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