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It looks like a quoting problem. It seems that you want to interpolate your variable $filename within your quoted string but interpolation does not happen within Perl's single quotes.

There are several possibilities, but one would be to use double quotes, then escape the double quotes and "\n" you are using:

system "echo -e \"$filename.txt\\n$filename.xls\\n\" | phylip";

Also note that, on my system at least, I need the -e option to get backslash escapes to be interpreted.


In reply to Re: Query on Perl system command by philipbailey
in thread Query on Perl system command by Anonymous Monk

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    [tye]: apropos my several mentions of audit
    [Corion]: At least my (non-SELinux) Debian has that config thing set. I don't have non-Debian machines handy (except Android)
    [Corion]: My Android phone also has /proc/self/ loginuid, but that displays -1 (resp. 4GB). That might be because the phone is rooted.
    [tye]: -1 means nobody logged in or the process was started before audit got booted
    [davido]: ok, on my ubuntu system getlogin grabs from /proc/self/ loginuid (per strace)
    [tye]: disable /proc and then see what it does?
    [davido]: then it reads from /etc/passwd to decide who my uid is.
    [davido]: sorry, typed that before you asked me to disable proc

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