In QNX 6.3.2 I can look at the property of /dev/ttyq* device with the stty utility, for example:
# stty </ dev / ttyqb
But in 6.4.1 and 6.5, the same utility does not display anything. If I kill it, for example by pressing <Ctrl> <C>, then the following message appears:
sh: cannot open /dev/ttyqb: Interrupted function call
All tty* have the same behavior, except for those used in a photon at a terminal window.
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For Posix compliance an open of the slave pty device shall block until the master device is opened...this is what you are seeing. This was added in 640. (Try opening the master and your stty against the slave should complete, or try doing the stty against a tty device that is already opened via a pterm or telnet session.
NOTE:
This entry has been validated against the SDP version listed above. Use
caution when considering this advice for any other SDP version. For
supported releases, please reach out toQNX Technical Support if you have any questions/concerns.
