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Using sed to insert text file at first line

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# 8  
Old 03-28-2011
Quote:
Originally Posted by ctsgnb
@Bartus

LOL , you geek Smilie
Code:
 perl -e 'local $/;open A,"file.txt";open B,"source.txt";open C,">desti.txt";print C <A> . <B>'

Smilie
# 9  
Old 03-28-2011
insert file.txt to muliple files
Actually, I wanted to find a batch script that applies this insert 'file.txt' to all .c files in the current directory. So, in that case awk might be the best solution I guess:
Code:
find . -name "*.c" - exec awk 'NR==1{system("cat file.txt")}1' {} >{} \;

however, this command will wipe out all the contents in all .c files.
How do I further improve this script?

Thx.
Last edited by Scott; 03-28-2011 at 03:06 PM.. Reason: Code tags, please...
# 10  
Old 03-28-2011
Try:
Code:
for file in *.c
do
  cat file.txt "$file" > tempfile && mv tempfile "$file"
done

# 11  
Old 03-28-2011
Quote:
Originally Posted by Franklin52
Try:
Code:
for file in *.c
do
  cat file.txt "$file" > tempfile && mv tempfile "$file"
done

Yes but (just in case) if you care about keeping inodes of the $file you should


cat tempfile >"$file" ; rm tempfile instead of the mv
# 12  
Old 03-28-2011
Quote:
Originally Posted by ctsgnb
Yes but (just in case) if you care about keeping inodes of the $file you should


cat tempfile >"$file" ; rm tempfile instead of the mv
In that case you can remove the tempfile after the loop instead of in the loop:
Code:
for file in *.c
do
  cat file.txt "$file" > tempfile
  cat tempfile > "$file"
done
rm tempfile

# 13  
Old 03-28-2011
Obviously Smilie
# 14  
Old 03-28-2011
Thanks guys. One more difficulty. I run the following script from cygwin:

#!/bin/bash
for file in *.c
do
cat Head.c "$file" > tempfile && mv tempfile "$file"
done

...and get the following error:

./insert.sh: line 3: syntax error near unexpected token `$'do\r''
'/insert.sh: line 3: `do

..hmmm...what did I wrong?
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