unlockpt: odemknout pár pseudoterminálů master / slave

Originální popis anglicky: unlockpt - unlock a pseudo-terminal master/slave pair

Návod, kniha: POSIX Programmer's Manual

STRUČNĚ

#include <stdlib.h> int unlockpt(int fildes);

POPIS / INSTRUKCE

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.

NÁVRATOVÁ HODNOTA

Upon successful completion, unlockpt() shall return 0. Otherwise, it shall return -1 and set errno to indicate the error.

CHYBY / ERRORY

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.

PŘÍKLADY POUŽITÍ

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SOUVISEJÍCÍ

grantpt() , open() , ptsname() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>

COPYRIGHT

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 .