3

I have files whose extension is .AH. For example:

aa.AH
bb.AH
cc.AH
dx.AH
tmz.AH
lght.AH

I want to select all of these files, but not one by one because I use saclst (it's a command to read and write seismogram headers), and it needs all files for comparison for NPTS (which is the number of points). So I use this code:

for file in *AH
   do

   nptsAH=$(saclst npts f ${file}* > nptsAH.txt | awk '{print $2}' nptsAH.txt | sort -n | head -1)
   declare -i nptsAH

   sac << !
   r $file
   interpolate NPTS $nptsAH
   w over
   q
   !
   done

Which form is correct for bash scripting?

Improve this question
2
  • 1
    In a for loop, you loop over the files one by one. How would you want to pick the files, but not one by one if you want to loop over them? Commented Jul 14, 2020 at 8:51
  • It's not clear what you want to do with the files. You may want to add your usage scenario. Commented Jul 14, 2020 at 8:54

1 Answer 1

Reset to default
6

A variable cannot hold multiple files or a pattern. But you may use an array:

files=(*.AH)

or

files=()
for file in *.AH; do
   files+=("$file")
   ...
   some_command using "$file"
done
...
some_command using "${files[@]}"

See also.

Improve this answer
1
  • ITYM you can use an array variable instead of a scalar variable. In Korn-like shells, var=value is a scalar variable assignment. It can only store one value. In zsh/ksh93-like shells, var=(...) is either a compound, array or associate array variable assignment depending on the shell and whether a type was given to the variable with typeset beforehand. In any case those are all variables (though with different types). Commented Jan 28, 2021 at 11:48

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.