The quoting gets lost when the shell parses the command line arguments. Your @ARGV has three elements, as you can check with perl -E"$,=':';say @ARGV" "1 2" "3" 4, which gives 1 2:3:4.

The echo command is exempt from this parsing: it is a builtin of cmd.exe.

You can accept the list from @ARGV and re-establish a "correct" quoting by passing the list to the appropriate function of Win32::ShellQuote] (or ShellQuote::Any, if portability matters). The documentation of Win32::ShellQuote comes with a warning, though:

Perl will try to detect if you need the shell by detecting shell metacharacters. The routine that checks that uses different quoting rules from both cmd.exe and the native Win32 parsing. Extra work must therefore be done to protect against this autodetection.
Your mileage will vary :)

In reply to Re: (Windows) verbatim command line arguments inside Perl script by haj
in thread (Windows) verbatim command line arguments inside Perl script by LanX

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