tt_default_session_set(library call)

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:

TT_OK
    The operation completed successfully.

TT_ERR_NOMP
    The ttsession(1) process is not running and the ToolTalk service cannot restart it.

TT_ERR_PROCID
    The current default process identifier is out of date or invalid.

TT_ERR_SESSION
    The specified ToolTalk session is out of date or invalid.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

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
tt_default_session

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

SEE ALSO

Tt/tt_c.h - Tttt_c(5), tt_open(3), tt_default_procid(3), tt_default_session(3).