UNIX for Dummies Questions & Answers

Hi Guys, I'm running a cron that mails me a file every night. The file is based on form input from the web and each evening after I mail it I delete and start a new file by the same name. It's a csv file so I preload a line of headers into the file. So far, so good. On days when no one inputs anything I get a file mailed to me with just my headers in place. I would like to stop these files from being sent (no user input). I know the size of the file
if it just contains my headers -183

I can ask for the size like this:

ls -1 myfile.csv | awk '{print $5}'

What I need is the
'if print $5 = 183 die else....and then I can go through the regular stuff I do, mailing the file, deleteing and starting a new file.

steven

not ls -one ls -ell the argument is lowercase l.

Code:

#!/bin/ksh
filesize()
{
     ls -l "$1" | awk '+{print $5}' | read fsize
     if [[ $fsize -eq  183 ]] ; then
           fsize=0
     fi
     echo "$fsize"
}

sz=$( filesize myfile.csv )
if [[ $sz -eq 0 ]]
   echo "No user input"
   exit
fi
# your code goes here

I tried the above code, replace myfile.csv with the proper file name and didn't add my code to the bottom yet. Got the following errors:

%sh checkfilesize1
: not found
ls: fts_open: No such file or directory
awk: syntax error at source line 1
context is
>>> +{ <<<
awk: bailing out at source line 1
: bad variable name
checkfilesize1: 17: Syntax error: end of file unexpected (expecting "then")
%

The + sign in the awk appears to be a typo.
The code can be simplified as follows.

Code:

#!/bin/ksh
fsize=$(ls -lad "myfile.csv"  | awk '{print $5}')
if [ ${fsize} -eq 183 ]
then
        echo "do nothing"
        exit
fi
echo "do something"
# your code goes here

Hi, thanks for the reply, I've just had time to plug it in and try it. I'm getting a syntax error as follows:

syntax error: `if' unmatched

I looked this up in google and ended up back here on another thread, smirk. I read through that and I seem to have filled the requirements for an if statement, 2 square brackets, white space on either end...command below...this is what I'm running now:

#!usr/local/bin/ksh
fsize=$(ls -lad "mydata.csv" | awk '{print $5}')
if [ ${fsize} -eq 183 ]
then
echo "do nothing"
exit
fi
echo "do something"

I dumbed it down to see if the first line worked, and it does:

#!usr/local/bin/ksh
fsize=$(ls -lad "mydata_godstone.csv" | awk '{print $5}')
print $fsize
fi

I'm not sure what's wrong now, I have an if and a then. thanks in advance. Steven

Code:

Typo in the first line?
#!usr/local/bin/ksh

#!/usr/local/bin/ksh