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Execute all files at once

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# 1  
Old 03-16-2013
Execute all files at once
Hi everyone, i'm newbie to unix!
If I have many files named by temp1.txt, temp2.text, temp3.txt,..... I want to introduce some key words at the top of each of files. The script (named bimbo) I tried is shown.
Code:
#!/bin/csh
set FILE=$1
echo $FILE
set OUT=$1
echo '%tage='$FILE  >> x_$FILE    
sed -e  '2i\%aveg=330'   x_$FILE  > x1  
sed -e  '3i\temp=3000MB'  x1 > x2
sed -e '4i\%rain=8'  x2  > x3
sed -e '5i\@skyhigh' x3  > x4
sed -e '6i\ '   x4> x5      # insert blank line
echo 'topic:'$FILE.txt >>  x5    # file names
sed -e '8i\ ' x5> x6
sed -e '9i\bm nnm'   x6 > x7
cat x7 $FILE.txt >  $OUT.out

when I execute: ./bimbo temp1 it works but not for multiple files at once /bimbo *.txt,? so how do i make to excetue all files at once? thanks
Last edited by jim mcnamara; 03-16-2013 at 11:16 PM..
# 2  
Old 03-16-2013
This might work:
Code:
ls temp*.txt | xargs -n 1 bimbo

The functionality could also be built into the bimbo script, so you could run bimbo temp*.txt, but the above way will probably work.

Of course, I hope you are saving copy of original files to verify bimbo script working correctly.
# 3  
Old 03-16-2013
Quote:
Originally Posted by hanson44
This might work:
Code:
ls temp*.txt | xargs -n 1 bimbo

The functionality could also be built into the bimbo script, so you could run bimbo temp*.txt, but the above way will probably work.

Of course, I hope you are saving copy of original files to verify bimbo script working correctly.
If there are numerous temp*.txt files so that it exceed the ARG_MAX you could get an "argument list too long" error.
better use the "for" SHELL built-in
Code:
for i in temp*.txt
do bimbo $i
done

# 4  
Old 03-16-2013
Are you sure about that? You may be right. But I thought part of the point of xargs was to avoid such problems. It seems to work, no error message, on a test I did. Any counter-example?
Code:
$ getconf ARG_MAX
2621440
$ seq 2621441 | xargs -n 1 echo | tail -2 # takes a while to run!
2621440
2621441

# 5  
Old 03-16-2013
Quote:
Originally Posted by hanson44
Are you sure about that? You may be right. But I thought part of the point of xargs was to avoid such problems. It seems to work, no error message, on a test I did. Any counter-example?
Code:
$ getconf ARG_MAX
2621440
$ seq 2621441 | xargs -n 1 echo | tail -2 # takes a while to run!
2621440
2621441

The ARG_MAX (or may be LINE_MAX) issue is with ls temp*.txt and not with xargs.
This User Gave Thanks to elixir_sinari For This Post:
hanson44
# 6  
Old 03-17-2013
Thanks.
# 7  
Old 03-18-2013
If you want to give a test (may takes a while but still) :
Code:
seq 2621441 | while read n
do touch tst_$n
done

then try :
Code:
ls tst_* | tail

then try :
Code:
for i in tst_*
do echo $i
done | tail
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