[cups.bugs] [HIGH] STR #3029: side-channel CUPS_SC_CMD_GET_BIDI command is broken

[Mikhail Krivtsov]

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[STR New]

"Query Printer for Default Options" invoked from web interface makes
"filter/commandtops" to complain (into log file):

Unable to auto-configure PostScript Printer - no bidirectional I/O
available!

According to source code ("backend/socket.") "socket" backend has
unconditional bidirectional support.

Investigation revealed that almost all implementations of side-channel
CUPS_SC_CMD_GET_BIDI command forget to return CUPS_SC_STATUS_OK status.

Link: http://www.cups.org/str.php?L3029
Version: 1.4b1