GNU/Linux man pages
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GNU/Linux |
Debian 7.3.0(Wheezy) |
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unlockpt(3) |
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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.
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EBADF |
The fd argument is not a file descriptor open for writing. | ||
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EINVAL |
The fd argument is not associated with a master pseudoterminal. |
unlockpt() is provided in glibc since version 2.1.
POSIX.1-2001.
grantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
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unlockpt(3) | |