Originální popis anglicky:
tcdrain - wait for transmission of output
Návod, kniha: POSIX Programmer's Manual
#include <termios.h>
int tcdrain(int
fildes);
The
tcdrain() function shall block until all output written to the object
referred to by
fildes is transmitted. The
fildes argument is an
open file descriptor associated with a terminal.
Any attempts to use
tcdrain() 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 process is blocking or ignoring SIGTTOU signals, the process shall be
allowed to perform the operation, and no signal is sent.
Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned
and
errno set to indicate the error.
The
tcdrain() function shall fail if:
- EBADF
- The fildes argument is not a valid file
descriptor.
- EINTR
- A signal interrupted tcdrain().
- ENOTTY
- The file associated with fildes is not a terminal.
The
tcdrain() function may fail if:
- EIO
- The process group of the writing process is orphaned, and
the writing process is not ignoring or blocking SIGTTOU.
The following sections are informative.
None.
None.
None.
None.
tcflush() , the Base Definitions volume of
IEEE Std 1003.1-2001, Chapter 11, General Terminal Interface,
<termios.h>,
<unistd.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
