tt_fd - return a file descriptor
#include <Tt/tt_c.h> int tt_fd(void);
tt_fd(3) ToolTalk Functions tt_fd(3)
NAME
tt_fd - return a file descriptor
SYNOPSIS
#include <Tt/tt_c.h>
int tt_fd(void);
DESCRIPTION
The tt_fd() function returns a file descriptor. The returned file
descriptor alerts the process that a message has arrived for the
default procid in the default session.
File descriptors are either active or inactive. When the file descrip-
tor becomes active, the process must call tt_message_receive(3) to
receive the message.
RETURN VALUE
Upon successful completion, the tt_fd() function returns the file
descriptor for the current procid. The application can use
tt_int_error(3) to extract one of the following Tt_status values from
the returned integer:
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The current default process identifier is out of date or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The specified ToolTalk session is out of date or invalid.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
The application must have a separate file descriptor for each procid.
To get an associated file descriptor, the application should use
tt_fd() each time it calls tt_open(3).
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_open(3), tt_int_error(3), tt_message_receive(3).
ToolTalk 1.3 1 March 1996 tt_fd(3)