pty man page on FreeBSD

Man page or keyword search:  
man Server   9747 pages
apropos Keyword Search (all sections)
Output format
FreeBSD logo
[printable version]

PTY(4)			 BSD Kernel Interfaces Manual			PTY(4)

     pty — BSD-style compatibility pseudo-terminal driver

     device pty

     The pty driver provides support for the traditional BSD naming scheme
     that was used for accessing pseudo-terminals.  When the device /dev/ptyXX
     is being opened, a new terminal shall be created with the pts(4) driver.
     A device node for this terminal shall be created, which has the name

     New code should not try to allocate pseudo-terminals using this inter‐
     face.  It is only provided for compatibility with older C libraries that
     tried to open such devices when posix_openpt(2) was being called.

     The BSD-style compatibility pseudo-terminal driver uses the following
     device names:

     /dev/pty[l-sL-S][0-9a-v]  Pseudo-terminal master devices.

     /dev/tty[l-sL-S][0-9a-v]  Pseudo-terminal slave devices.


     posix_openpt(2), pts(4), tty(4)

     A pseudo-terminal driver appeared in 4.2BSD.

     Unlike previous implementations, the master slave device nodes are
     destroyed when the PTY becomes unused.  A call to stat(2) on a nonexis‐
     tent master device will already cause a new master device node to be cre‐
     ated.  The master device can only be destroyed by opening and closing it.

     The pty driver cannot be unloaded, because it cannot determine if it is
     being used.

BSD				August 20, 2008				   BSD

List of man pages available for FreeBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
Vote for polarhome
Free Shell Accounts :: the biggest list on the net