пара терминалов главный / подчиненный (terminal master/slave pair)
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)
unlockpt — unlock a pseudo-terminal master/slave pair
Синопсис (Synopsis)
#include <stdlib.h>
int unlockpt(int fildes);
Описание (Description)
The unlockpt() function shall unlock the slave pseudo-terminal
device associated with the master to which fildes refers.
Conforming applications shall ensure that they call unlockpt()
before opening the slave side of a pseudo-terminal device.
Возвращаемое значение (Return value)
Upon successful completion, unlockpt() shall return 0. Otherwise,
it shall return -1 and set errno to indicate the error.
Ошибки (Error)
The unlockpt() function may fail if:
EBADF The fildes argument is not a file descriptor open for
writing.
EINVAL The fildes argument is not associated with a master
pseudo-terminal device.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
See the RATIONALE section for posix_openpt(3p).
Будущие направления (Future directions)
None.
Смотри также (See also)
grantpt(3p), open(3p), posix_openpt(3p), ptsname(3p)
The Base Definitions volume of POSIX.1‐2017, stdlib.h(0p)
