переданные выходные данные, непрочитанные входные данные или и то, и другое (transmitted output data, non-read input data, or both)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
tcflush — flush non-transmitted output data, non-read input data,
or both
Синопсис (Synopsis)
#include <termios.h>
int tcflush(int fildes, int queue_selector);
Описание (Description)
Upon successful completion, tcflush() shall discard data written
to the object referred to by fildes (an open file descriptor
associated with a terminal) but not transmitted, or data received
but not read, depending on the value of queue_selector:
* If queue_selector is TCIFLUSH, it shall flush data received
but not read.
* If queue_selector is TCOFLUSH, it shall flush data written
but not transmitted.
* If queue_selector is TCIOFLUSH, it shall flush both data
received but not read and data written but not transmitted.
Attempts to use tcflush() from a process which is a member of a
background process group on a fildes associated with its
controlling terminal shall cause the process group to be sent a
SIGTTOU signal. If the calling thread is blocking SIGTTOU
signals or the process is ignoring SIGTTOU signals, the process
shall be allowed to perform the operation, and no signal is sent.
Возвращаемое значение (Return value)
Upon successful completion, 0 shall be returned. Otherwise, -1
shall be returned and errno set to indicate the error.
Ошибки (Error)
The tcflush() function shall fail if:
EBADF The fildes argument is not a valid file descriptor.
EINVAL The queue_selector argument is not a supported value.
EIO The process group of the writing process is orphaned, the
calling thread is not blocking SIGTTOU, and the process is
not ignoring SIGTTOU.
ENOTTY The file associated with fildes is not a terminal.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
tcdrain(3p)
The Base Definitions volume of POSIX.1‐2017, Chapter 11, General
Terminal Interface, termios.h(0p)
