Inserting into multiple files

[Rustican]

How can i use awk to insert the first line of multiple files in a directory?

Example: Inserting a name into txt files.

Jon Doe
Rest of file...

 

[LKBrwnDBA]

Insert the same line into all files in a directory?

for f in $(ls)
do
  mv $f ${f}.tmp
  echo 'John Doe'|cat - ${f}.tmp>$f
done

----------------------------------------------------------------------------
The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

 

[iribach]

this will not leave cadaver in your dir

#!/bin/sh

# not assuming [k|ba]sh is used
for file in `ls` 
do [ -w $file ] || continue
   (
    echo blabla blabla
    cat $file
    ) >temp.file
    mv temp.file $file
done

note: a sed or an here-vi are eleganter.

 

[Ygor]

It is possible to do this in awk, but involves loading the entire contents of each file into an array.

BEGIN{a[0]="john doe"}
f!=FILENAME&&c{p();c=0}
{a[++c]=$0;f=FILENAME}
function p(){for(x=0;x<=c;x++) print a[x] > f;close f}
END{p()}

Example usage...
[tt]
awk95.exe -f awkprog *.txt[/tt]

 

[Rustican]

Thanks for all the help. I'll give them a try.

 

[iribach]

ygor, interesting.
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