Description:
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When calling popen() with a command line longer than 1024 characters, the command is truncated without any warning


Reproduce code:
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$command = <some line longer than 1024 characters>;
$handle = popen ($command);


Expected result:
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I would expect at least a warning that says that the command line has been truncated or error saying that the command line is too long.

This, and an increase to 2048 or 4096, if no general issue about comand line length.