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UNLOCKPT(3) Library Functions Manual UNLOCKPT(3) NAME 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. Conforming 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"). NetBSD 8.0 May 25, 2004 NetBSD 8.0