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Shell Script - File Input/Output in C

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# 1  
Old 11-27-2012
Shell Script - File Input/Output in C
This is part of my code:

Code:
       
 for in_file in $1/*.in    # list of all .in files in working directory.    
 do                
     $c_file < $in_file > "$tempFile.out"             
      if  diff "$tempFile.out" $out_file  >/dev/null 2>&1 ;            
      then               
          echo "corresponding files are the same!"           
     else                 
          echo "different!"           
    fi 
done

$c_file is a C program, $in_file is an input file. "$tempFile.out" doesn't work.... I don't think the output file was created.



This code is inside a for loop, and for each loop, there is a different input file. A file is created after the first loop, but "$tempFile.out" isn't overridden for the next loops. So, for diff, it's comparing "$tempFile.out" with $out_file for each loop.
I want the output of $c_file < $in_file to override "$tempFile.out" for each loop.
Any ideas?
Last edited by spider-man; 11-27-2012 at 02:46 AM..
# 2  
Old 11-27-2012
You can try like this,

Code:
 for in_file in $1/*.in    # list of all .in files in working directory.    
 do
 $c_file < $in_file >> $tempFile.out
  if  diff "$tempFile.out" $out_file  >/dev/null 2>&1 ;            
   then               
  echo "corresponding files are the same!"           
  else                 
echo "different!"           
  fi done

# 3  
Old 11-27-2012
I changed to code to what you wrote.

it's actually created a new file called ".out"

It doesn't seems to be overriding the .out
It seems like it's adding more inputs to the .out file for each loop.

Is there a simpler way of doing this?
# 4  
Old 11-27-2012
I don't see a variable tempFile defined anywhere!!

I think you have to remove the "$" sign in that, so that it would write in a file named tempFile.out

What are the extra inputs that were added to this out file???
# 5  
Old 11-27-2012
yup, it created tempFile.out

Let me give you an example:
I have two .in files
Code:
%cat hi.in
abc

%cat bye.in
def

the tempfile will end up containing:
abcdef
after two loops.

It seems like it's gathering up the inputs in the tempfile.
# 6  
Old 11-27-2012
I am sorry, I couldn't understand this issue here Smilie
# 7  
Old 11-27-2012
nvm, it works now. lol

I changed
Code:
$c_file < $in_file >> tempFile.out

back to
Code:
$c_file < $in_file > tempFile.out

It works!!!
Last edited by Scott; 11-27-2012 at 03:28 AM.. Reason: Code tags
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