I intend to find *.lsf following the current /subdirectories and execute bsub<*.lsf for all the find files.
I tried:
find ./ -type f -name "*.lsf" -exec bsub < \;
The part find ./ -type f -name "*.lsf" works fine. However, the execute part has problems.
Can anyone helps figure out?
You could work with xargs:
find ./ -type f -name "*.lsf" | xargs bsub
In fact, you could shorten the hole thing to:
find *.lsf | xargs bsub
Comment: Tested on the cluster I use.
Edit: Removed replacement string option and redirection character.
Using xargs, in a way that works. (Note as @KamilMaciorowski said, this is unsafe.)
find . -type f -iname "*.lsf" | xargs -I {} bash -c 'cat < {}'
Then fixing for file-names spaces etc
find . -type f -iname "*.lsf" -print0 | xargs -0 -I {} bash -c 'cat < {}'
I tested with cat. You will have to replace with your command
… bash -c 'cat < "$1"' bash {}
– Kamil Maciorowski
Jun 20 '20 at 21:21
You were nearly there with your first attempt. What you need to do is to invoke a shell to parse the < redirection operator
find -name '*.lsf' -exec bash -c 'bsub <"$1"' _ {} \;
However, this isn't very efficient as you are now starting a shell for every matched file. Invoke the shell as few times as possible and use a loop to process multiple files at once
find -name '*.lsf' -exec bash -c 'for i in "$@"; do bsub <"$i"; done' _ {} +
Both of these are filename-safe (i.e. they handle whitespace and non-printing/semi-printing characters in file names).
<and it right hand side operator, will be evaluated before the programs are executed. – ctrl-alt-delor Jun 19 '20 at 15:58bsubdoes, you can probably leave the<. – Jona Engel Jun 19 '20 at 17:54xargs -I {}tells xargs to replace the string{}with what it gets from standard input. In this case stdin is the pipe|. Which redirects the standard output fromfind. TThe replacement string does not have to be{}, it can be anything you chose.{}is just common. This is all in the man pages – Jona Engel Jun 19 '20 at 18:05