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Reading file and return value

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# 1  
Old 02-08-2010
Reading file and return value
Hi guys,

I am newbie in unix, so I need your help.
I need to right unix function code that can read sample.txt. If sample.txt contains sentence such as "Error due to syntax." then it will return value.

I tried below code, but I got errors.

Code:
 
if [ $errcheck == 1 ] 
   then
     echo " There are errors in the file"
else
     echo " There are no errors in the file"
fi
 
errtext="Error due to syntax"
 
errcheck ()
{
grep "Error due to syntax" sample.txt 
 
if [ $? == $errtext ]
   then
      return 1
   else
      return 0
    fi
}

Thanks in advance.
# 2  
Old 02-08-2010
You could try a script like this (replace /path/to/file with the actual path to the file you are grepping for errors):

Code:
#!/bin/bash

no_errors=`grep -c "Error due to syntax" /path/to/file`

if test $no_errors -gt 0;
        then
                echo "There are errors in the file"
        else
                echo "There are no errors in the file"
fi

# 3  
Old 02-08-2010
Quote:
Originally Posted by cmf1985
You could try a script like this (replace /path/to/file with the actual path to the file you are grepping for errors):

Code:
#!/bin/bash
 
no_errors=`grep -c "Error due to syntax" /path/to/file`
 
if test $no_errors -gt 0;
        then
                echo "There are errors in the file"
        else
                echo "There are no errors in the file"
fi

Thank you very much for your instant answer. Smilie
# 4  
Old 02-08-2010
The error in your script is that you evaluata a variable 'errcheck' instead of makeing a function call. So you should write

Code:
if errcheck
   then
     echo " There are errors in the file"
else
     echo " There are no errors in the file"
fi
 
errtext="Error due to syntax"
 
errcheck ()
{
grep "Error due to syntax" sample.txt 
 
if [ $? == $errtext ]
   then
      return 1
   else
      return 0
    fi
}

or much shorter:

Code:
if grep "Error due to syntax" sample.txt >/dev/null
then
     echo " There are errors in the file"
else
     echo " There are no errors in the file"
fi



---------- Post updated at 13:04 ---------- Previous update was at 13:03 ----------

Oops, cmf1985 answered the question already! :-)
# 5  
Old 02-08-2010
Thank you for your answer, too. I will try to implement them to my codes.
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