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unlockpt(3) [netbsd man page]

UNLOCKPT(3)						   BSD Library Functions Manual 					       UNLOCKPT(3)

unlockpt -- unlock the slave pseudo-terminal device LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdlib.h> int unlockpt(int fildes); DESCRIPTION
The unlockpt() unlocks access to the pseudo-terminal device corresponding to the master pseudo-terminal device associated with fildes. Con- forming applications must call this function before opening the slave pseudo-terminal device. RETURN VALUES
If successful, unlockpt() returns 0; otherwise a value of -1 is returned and errno is set to indicate the error. ERRORS
The unlockpt() function will fail if: [EACCESS] the corresponding pseudo-terminal device could not be accessed. [EBADF] fildes is not a valid descriptor. [EINVAL] fildes is not associated with a master pseudo-terminal device. NOTES
In NetBSD unlockpt() does nothing. SEE ALSO
ioctl(2), grantpt(3), posix_openpt(3), ptsname(3) STANDARDS
The unlockpt() function conforms to IEEE Std 1003.1-2001 (``POSIX.1''). Its first release was in X/Open Portability Guide Issue 4, Version 2 (``XPG4.2''). BSD
May 25, 2004 BSD

Check Out this Related Man Page

unlockpt(3C)						   Standard C Library Functions 					      unlockpt(3C)

unlockpt - unlock a pseudo-terminal master/slave pair SYNOPSIS
#include <stdlib.h> int unlockpt(int fildes); DESCRIPTION
The unlockpt() function unlocks the slave pseudo-terminal device associated with the master to which fildes refers. Portable applications must call unlockpt() before opening the slave side of a pseudo-terminal device. RETURN VALUES
Upon successful completion, unlockpt() returns 0. Otherwise, it returns -1 and sets errno to indicate the error. ERRORS
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. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
open(2), grantpt(3C), ptsname(3C), attributes(5), standards(5) STREAMS Programming Guide SunOS 5.10 14 Aug 2002 unlockpt(3C)
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