There are two basic ways to check whether a file exists before clobbering it. You can use stat or its little cousin -e on the filename before opening, or else you can call sysopen with the O_EXCL flag set and catch the error when the file exists.

As near as I can see, lwp-download is a one-shot program not designed for downloading multiple files. In your wrapper, you could accept a list of urls from the command line and loop through calls to lwp-download. I don't know why you are getting only one getFile() call through unless you are hitting some fatal error in the first call.

Why don't you just call lwp-download through system instead of pasting it into a subroutine? I'm very suspicious of that procedure, there are lots of traps you can trip doing that.

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