tt_fd(library call) tt_fd(library call)
NAME [Toc] [Back]
tt_fd - return a file descriptor
SYNOPSIS [Toc] [Back]
#include <Tt/tt_c.h>
int tt_fd(void)
DESCRIPTION [Toc] [Back]
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
descriptor becomes active, the process must call tt_message_receive(3)
to receive the message.
RETURN VALUE [Toc] [Back]
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The current default process identifier is out of date or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The specified ToolTalk session is out of date or invalid.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 [Toc] [Back]
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).
SEE ALSO [Toc] [Back]
Tt/tt_c.h - Tttt_c(5), tt_open(3), tt_int_error(3),
tt_message_receive(3).
- 1 - Formatted: January 24, 2005 [ Back ] |
