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Top Forums Shell Programming and Scripting Need assistance with a simple script Post 302494525 by BeefStu on Monday 7th of February 2011 02:01:55 PM
Old 02-07-2011
Quote:
Originally Posted by Beginer0705
I have a simple script. Do you know what I got this error?

./total_memory.ksh: line 5: [: missing `]'

Thanks

====================

#! /bin/bash
setmem=30177660
totalMemory= grep MemTotal /proc/meminfo | awk '{print $2}'

if [$totalMemory -lt $setmem] ; then
echo "Total memory $totalMemory is less than :$setmem"
exit 1

else
echo "Total memory is :$totalMemory"
fi
I am not a bash expert,but if this was written in ksh I see a few problems.

It appears that the variable totalMemory is not set. You need to fix
that by doing somehting like this:
Code:
totalMemory=$(grep MemTotal /proc/meminfo | awk '{print $2}')

or
Code:
totalMemory=`grep MemTotal /proc/meminfo | awk '{print $2}'`

Next in the comparison put a space between the brackets and the
expression. Also qualify your vairables "$totalMemory" so if it's not set
your script will not bomb.

Last edited by Scott; 02-07-2011 at 03:15 PM..
 

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exit(1) 							   User Commands							   exit(1)

NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps SYNOPSIS
sh exit [n] return [n] csh exit [ ( expr )] goto label ksh *exit [n] *return [n] DESCRIPTION
sh exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of the last command executed (an EOF will also cause the shell to exit.) return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe- cuted. csh exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the expression expr. The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to jump to a label that occurs between a while or for built-in command and its corresponding end. ksh exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit except for a shell which has the ignoreeof option (See set below) turned on. return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return is invoked while not in a function or a '.' script, then it is the same as an exit. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
break(1), csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 exit(1)
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