INPUT_FILE=`ls -rt $MY_DIR/FILE.*.xml | head -1 | xargs basename`
I wanted to execute the second command (
head -1) only if the first command is successful. How do I improve this command?
Also, if you don't want the user to see any error output from
Also note that I added quotation marks around
If you're using a modern shell such as bash, you should use a
In a pipe line, all commands are started concurrently, note one after the other. So you need to store the output somewhere.
Find the latest modified file in a directory:
Instead of calling out to
In a directory with these contents:
The contents of the base_fn variable would be:
To use this properly to serve the purpose of your request:
EDIT: upon review of the question, i have realized that the
the important thing to note is that you absolutely, under no circumstances ever in mankind, should not parse the output of ls. never.
I think that the best option here is:
if there is no file then the return code of ls is 2 but if it finds some file will be 0.