This leads me to the question: how does qx select the aforementioned "/bin/sh equivalent"?
The shell that is used is determined at the time that the perl executable was compiled. On Unix-like systems it will probably be /bin/sh
, but on other platforms (OS2, Win32, VMS) it could be very different.
Also, the shell is not guaranteed to be "equivalent" to /bin/sh. On non-Unix systems perhaps "counterpart" is a better way to describe it.
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