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if statement sytax

 
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# 1  
Old 12-18-2009
if statement sytax
Hello all,

I'm a Unix novice for the most part. I have script running in tcsh (bash from the command prompt).

All I'm trying to do is have the script create a file if need be, and if the file exists, exit the script. Here is the coding:

Code:
tail -50 /home/redlight/usac.log | grep redlight.rpt | grep "`date | cut -c5-10`" > /home/redlight/usac_ok.txt
echo "Script has run the tail statement."
if [ -s /home/redlight/usac_ok.txt ] then
   exit 0
endif

When I run this I get a "if: syntax error". Where is the error in the script?


thanks,

sax2groove2
Last edited by Scott; 12-18-2009 at 05:03 PM.. Reason: Added code tags
# 2  
Old 12-18-2009
You are missing a semi-colon, try

Code:
tail -50 /home/redlight/usac.log | grep redlight.rpt | grep "`date | cut -c5-10`" > /home/redlight/usac_ok.txt
echo "Script has run the tail statement."
if [ -s /home/redlight/usac_ok.txt ]; then
exit 0
endif

I don't know the csh all that well, as I do mostly korn and bash which both use fi instead of endif.
Padow
# 3  
Old 12-18-2009
In bash a simple if then construct would work.

Code:
#!/bin/bash

# set file path here

filepath="/path/to/my/file"

# now check if it exists...

if [[ -e $filepath ]]

    then /bin/echo "$filepath already exists"
 
    else `tail -50 /home/redlight/usac.log | grep redlight.rpt | grep "`date | cut -c5-10`" > /home/redlight/usac_ok.txt`

fi

done


The [[ -e ]] checks if it exists.
# 4  
Old 12-22-2009
thanks everyone. I'm still having problems with the script, but I'm sure these solutions are correct.
 
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