разблокировать пару псевдотерминал главный / подчиненный (unlock a pseudoterminal master/slave pair)
Имя (Name)
unlockpt - unlock a pseudoterminal master/slave pair
Синопсис (Synopsis)
#define _XOPEN_SOURCE
#include <stdlib.h>
int unlockpt(int fd);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
unlockpt():
Since glibc 2.24:
_XOPEN_SOURCE >= 500
Glibc 2.23 and earlier:
_XOPEN_SOURCE
Описание (Description)
The unlockpt() function unlocks the slave pseudoterminal device
corresponding to the master pseudoterminal referred to by the
file descriptor fd.
unlockpt() should be called before opening the slave side of a
pseudoterminal.
Возвращаемое значение (Return value)
When successful, unlockpt() returns 0. Otherwise, it returns -1
and sets errno to indicate the error.
Ошибки (Error)
EBADF The fd argument is not a file descriptor open for writing.
EINVAL The fd argument is not associated with a master
pseudoterminal.
Версии (Versions)
unlockpt() is provided in glibc since version 2.1.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│unlockpt() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Смотри также (See also)
grantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)
