tt_default_session_set(3)

NAME
tt_default_session_set - set the current default session identifier

SYNOPSIS
#include <Tt/tt_c.h>

Tt_status tt_default_session_set(const char *sessid);

DESCRIPTION
The tt_default_session_set() function sets the current default session identifier.

The ToolTalk service uses the initial user session as the default session and supports one session per procid. The application can make this call before it calls tt_open(3) to specify the session to which it wants to connect.

The sessid argument is a pointer to the unique identifier for the session in which the procid is interested.

RETURN VALUE
Upon successful completion, the tt_default_session_set() function returns the status of the operation as one of the following Tt_status values:

    The operation completed successfully.
    The ttsession(1) process is not running and the ToolTalk service cannot restart it.
    The current default process identifier is out of date or invalid.
    The specified ToolTalk session is out of date or invalid.

APPLICATION USAGE
To change to another opened session, the application must use the tt_default_procid_set() function.

To join other sessions, the procid must first set the new session as the default session, and then initialize and register with the ToolTalk service. The calls required must be in the following order:

    tt_default_session_set()
    tt_open(3)

The tt_open(3) may create another ToolTalk procid, the connection to which is identified by a procid. Only one ToolTalk session per procid is allowed. (However, multiple procids are allowed in a client.) There are no API calls to determine to which session a particular procid is connected. If it is important for the application to know the session to which it is connected, it must make the following calls in the indicated order:

    tt_open(3)
    tt_default_session(3)

The application can then store the information by indexing it by the procid returned by the tt_open(3) call.

SEE ALSO
Tttt_c(5), tt_open(3), tt_default_procid(3), tt_default_session(3).