[xml] Why does "-" read from stdin?

[Michael Day <mikeday yeslogic com>]

Hi,

Why does xmlReadFile read from stdin if "-" is specified as a filename, 
and is there any way to disable this behaviour?

It seems that this will create potential bugs wherever a program passes 
a filename to libxml2 without checking it first; if the filename is "-" 
then libxml2 will attempt to read from stdin and the program may block 
indefinitely.

Best regards,

Michael

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