tt_open - return the process identifier for the calling process
#include <Tt/tt_c.h> char *tt_open(void);
tt_open(3) ToolTalk Functions tt_open(3)
NAME
tt_open - return the process identifier for the calling process
SYNOPSIS
#include <Tt/tt_c.h>
char *tt_open(void);
DESCRIPTION
The tt_open() function returns the process identifier for the calling
process.
RETURN VALUE
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 three exceptions: tt_default_session_set(3), tt_fea-
ture_required(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:
tt_default_session_set(3)
tt_open()
RETURN VALUE
Upon successful completion, the tt_open() function returns the charac-
ter 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.
TT_ERR_NOMP
The ttsession(1) process is not running and the ToolTalk
service cannot restart it.
APPLICATION USAGE
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
call tt_default_procid_set().
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | library/tooltalk |
+---------------+------------------+
|Stability | Committed |
+---------------+------------------+
SEE ALSO
tt_c(5), tt_fd(3), tt_default_procid(3), tt_default_procid_set(3),
tt_default_session(3), tt_default_session_set(3), tt_fea-
ture_required(3), tt_ptr_error(3), tt_free(3).
ToolTalk 1.3 1 March 1996 tt_open(3)