UNLOCKPT(3) - man page online | library functions

Unlock a pseudoterminal master/slave pair.

UNLOCKPT(3)                         Linux Programmer's Manual                         UNLOCKPT(3)

NAME unlockpt - unlock a pseudoterminal master/slave pair
SYNOPSIS #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h> int unlockpt(int fd);
DESCRIPTION The unlockpt() function unlocks the slave pseudoterminal device corresponding to the mas‐ ter pseudoterminal referred to by fd. unlockpt() should be called before opening the slave side of a pseudoterminal.
RETURN VALUE When successful, unlockpt() returns 0. Otherwise, it returns -1 and sets errno appropri‐ ately.
ERRORS EBADF The fd argument is not a file descriptor open for writing. EINVAL The fd argument is not associated with a master pseudoterminal.
VERSIONS unlockpt() is provided in glibc since version 2.1.
ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌───────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├───────────┼───────────────┼─────────┤ │unlockpt() │ Thread safety │ MT-Safe │ └───────────┴───────────────┴─────────┘
SEE ALSO grantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
2015-08-08 UNLOCKPT(3)
This manual Reference Other manuals
unlockpt(3) referred by getpt(3) | grantpt(3) | posix_openpt(3) | pts(4) | ptsname(3) | pty(7) | tty_ioctl(4)
refer to attributes(7) | feature_test_macros(7) | grantpt(3) | posix_openpt(3) | pts(4) | ptsname(3) | pty(7)