I'm quite new to Bash so this might be something trivial, but I'm just not getting it. I'm trying to escape the spaces inside filenames. Have a look. Note that this is a 'working example' - I get that interleaving files with blank pages might be accomplished easier, but I'm here about the space.
#! /bin/sh
first=true
i=combined.pdf
o=combined2.pdf
for f in test/*.pdf
do
if $first; then
first=false
ifile=\"$f\"
else
ifile=$i\ \"$f\"
fi
pdftk $ifile blank.pdf cat output $o
t=$i
i=$o
o=$t
break
done
Say I have a file called my file.pdf
(with a space). I want the ifile variable to contain the string combined.pdf "my file.pdf"
, such that pdftk is able to use it as two file arguments - the first one being combined.pdf
, and the second being my file.pdf
.
I've tried various ways of escaping (with or without first escaping the quotes themselves, etc.), but it keeps splitting my
and file.pdf
when executing pdftk.
EDIT: To clarify: I'm trying to pass multiple file names (as multiple arguments) in one variable to the pdftk command. I would like it to recognise the difference between two file names, but not tear one file name apart at the spaces.
Putting multiple arguments into a single variable doesn't make sense. Instead, put them into an array:
args=(combined.pdf "my file.pdf");
Notice that "my file.pdf"
is quoted to preserve whitespace.
You can use the array like this:
pdftk "${args[@]}" ...
This will pass two separate arguments to pdftk
. The quotes in "${args[@]}"
are required because they tell the shell to treat each array element as a separate "word" (i.e. do not split array elements, even if they contain whitespace).
As a side note, if you use bash
isms like arrays, change your shebang to
#!/bin/bash
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