NAME
unlockpt - unlock a pseudoterminal master/slave pair SYNOPSIS
#define XOPENSOURCE /* See featuretestmacros(7) */
#include
int unlockpt(int fd); DESCRIPTION The unlockpt() function unlocks the slave pseudoterminal device corre‐ sponding to the master pseudoterminal referred to by fd. unlockpt() should be called before opening the slave side of a pseu‐ doterminal. RETURN VALUE When successful, unlockpt() returns 0. Otherwise, it returns -1 and sets errno appropriately. 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 │ └───────────┴───────────────┴─────────┘ CONFORMING TO
POSIX.1-2001. SEE ALSO grantpt(3), posixopenpt(3), ptsname(3), pts(4), pty(7) COLOPHON
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2008-06-14 UNLOCKPT(3)