tt_open(library call) tt_open(library call)
NAMEtt_open — return the process identifier for the calling process
The tt_open function returns the process identifier for the calling
The tt_open function also sets this identifier as the default procid
for the process. The tt_open(3) function is typically the first
ToolTalk function called by a process.
The application must call tt_open(3) before other tt_ calls are made.
However, there are two exceptions: tt_default_session_set(3) and
tt_X_session(3) can be called before tt_open.
A process can call tt_open more than once to obtain multiple procids.
To open another session, the process must make the following calls in
the order specified:
Upon successful completion, the tt_open function returns the character
value that uniquely identifies the process. The application can use
tt_ptr_error(3) to extract one of the following Tt_status values from
the returned pointer:
TT_OK The operation completed successfully.
The ttsession(1) process is not running and the ToolTalk ser‐
vice cannot restart it.
The application should use tt_free(3) to free any data stored in the
address returned by the ToolTalk API.
Each procid has its own associated file descriptor, and can join
another session. To switch to another procid, the application should
Tt/tt_c.h - Tttt_c(5), tt_fd(3), tt_default_procid(3), tt_default_pro‐
cid_set(3), tt_default_session(3), tt_default_session_set(3),