I have something like this:
% ls -1dF /tmp/foo/*
/tmp/foo/000f9e956feab3ee4625aebb65ae7bae9533cdbc/
/tmp/foo/002e34c2218f2c86fefd2876f0e5c2559c5fb3c4/
/tmp/foo/00b483576791bab751e6cb7ee0a7143af43a8069/
.
.
.
/tmp/foo/fedd0f7b545e7ae9600142656756456bc16874d3/
/tmp/foo/ff51ac87609012137cfcb02f36624f81cdc10788/
/tmp/foo/ff8b983a7411395344cad64182cb17e7cdefa55e/
I want to create a directory bar
under each of the subdirectories under foo
.
If I try to do this with
% mkdir -p /tmp/foo/*/bar
…I get the error
zsh: no matches found: /tmp/foo/*/bar
(In hindsight, I can understand the reason for the error.)
I know that I can solve the original problem with a for-loop, but I'm curious to know if zsh
supports some form of parameter expansion that would produce the desired argument for a single invocation of mkdir -p
. IOW, a parameter expansion equivalent to "append /bar
to every prefix generated by expanding /tmp/foo/*
", resulting in
% mkdir -p /tmp/foo/000f9e956feab3ee4625aebb65ae7bae9533cdbc/bar ... /tmp/foo/ff8b983a7411395344cad64182cb17e7cdefa55e/bar
Best Answer
This is extended globbing that has a
q
uiet glob flag that uses a glob qualifier to match only directories and a modifier to perform as
ubstitution (using the%
pattern character that is only available in history substitution pattern mode) that appends a string to each word.