unlockpt — unlock a pseudoterminal master/slave pair
#define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h>
int
unlockpt( |
int fd); |
The unlockpt() function
unlocks the slave pseudoterminal device corresponding to the
master pseudoterminal referred to by fd.
unlockpt() should be called
before opening the slave side of a pseudoterminal.
When successful, unlockpt()
returns 0. Otherwise, it returns −1 and sets
errno appropriately.
The fd
argument is not a file descriptor open for writing.
The fd
argument is not associated with a master
pseudoterminal.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
unlockpt() |
Thread safety | MT-Safe |
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