04-02-2013
Hi Corona688...
Ignore my last I think I can use KB control during the scan(s) in _REAL_TIME_ without the second terminal...
Thanks for attempting to undestand my gibberish.
The idea was to use the second terminal as a control panel with pseudo-buttons that activated upon pressing a relevant KB character, (INKEY$), sending that character to the main terminal to be acted upon. But I think there might be enough room by overwriting the status window in the original code with small buttons. The idea was to use the second terminal to control external stuff too without affecting the first terminal and if the link was broken the local access by the first terminal would be unaffected and still active...
So FTTB I will take look at the new idea...
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LEARN ABOUT SUNOS
tcgetsid
tcgetsid(3C) Standard C Library Functions tcgetsid(3C)
NAME
tcgetsid - get process group ID for session leader for controlling terminal
SYNOPSIS
#include <termios.h>
pid_t tcgetsid(int fildes);
DESCRIPTION
The tcgetsid() function obtains the process group ID of the session for which the terminal specified by fildes is the controlling terminal.
RETURN VALUES
Upon successful completion, tcgetsid() returns the process group ID associated with the terminal. Otherwise, a value of (pid_t)-1 is
returned and errno is set to indicate the error.
ERRORS
The tcgetsid() function will fail if:
EACCES The fildes argument is not associated with a controlling terminal.
EBADF The fildes argument is not a valid file descriptor.
ENOTTY The file associated with fildes is not a terminal.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
attributes(5), standards(5), termio(7I)
SunOS 5.10 14 Aug 2002 tcgetsid(3C)