# [−][src]Function nix::pty::posix_openpt

    pub fn posix_openpt(flags: OFlag) -> Result<PtyMaster>

Open a pseudoterminal device (see `posix_openpt(3)`)

`posix_openpt()` returns a file descriptor to an existing unused pseuterminal master device.

# Examples

A common use case with this function is to open both a master and slave PTY pair. This can be done as follows:

    use std::path::Path;
    use nix::fcntl::{OFlag, open};
    use nix::pty::{grantpt, posix_openpt, ptsname, unlockpt};
    use nix::sys::stat::Mode;

    // Open a new PTY master
    let master_fd = posix_openpt(OFlag::O_RDWR)?;

    // Allow a slave to be generated for it
    grantpt(&master_fd)?;
    unlockpt(&master_fd)?;

    // Get the name of the slave
    let slave_name = unsafe { ptsname(&master_fd) }?;

    // Try to open the slave
    let _slave_fd = open(Path::new(&slave_name), OFlag::O_RDWR, Mode::empty())?;

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