Is the order of iteration in bash for loop guarant

问题:

This question already has an answer here:

What sort order does Linux use? (1 answer)

Closed 3 years ago.

Let's say I have a for loop in bash which looks like this:

for i in $MYDIR/*.jar
do
    # do something with files
done

Is the order of iteration guaranteed, i.e. will the loop always process files in same order? If it is guaranteed, is the order alphabetical?

回答1:

According to the bash man page:

Pathname Expansion

After word splitting, unless the -f option has been set, bash scans each word for the characters *, ?, and [. If one of these characters appears, then the word is regarded as a pattern, and replaced with an alphabetically sorted list of filenames matching the pattern (see Pattern Matching below).

So, the files will be processed in alphabetical order (which depends on your locale, see comments) due to globbing expansion rules.