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-.\" This man page was written by Jeremy Phelps <jphelps@notreached.net>.
-.\" Notes added - aeb
-.\"
-.\" %%%LICENSE_START(FREELY_REDISTRIBUTABLE)
-.\" Redistribute and revise at will.
-.\" %%%LICENSE_END
-.\"
-.TH pts 4 (date) "Linux man-pages (unreleased)"
-.SH NAME
-ptmx, pts \- pseudoterminal master and slave
-.SH DESCRIPTION
-The file
-.I /dev/ptmx
-(the pseudoterminal multiplexor device)
-is a character file with major number 5 and
-minor number 2, usually with mode 0666 and ownership root:root.
-It is used to create a pseudoterminal master and slave pair.
-.P
-When a process opens
-.IR /dev/ptmx ,
-it gets a file
-descriptor for a pseudoterminal master
-and a pseudoterminal slave device is created in the
-.I /dev/pts
-directory.
-Each file descriptor obtained by opening
-.I /dev/ptmx
-is an independent pseudoterminal master with its own associated slave,
-whose path can
-be found by passing the file descriptor to
-.BR ptsname (3).
-.P
-Before opening the pseudoterminal slave, you must pass the master's file
-descriptor to
-.BR grantpt (3)
-and
-.BR unlockpt (3).
-.P
-Once both the pseudoterminal master and slave are open, the slave provides
-processes with an interface that is identical to that of a real terminal.
-.P
-Data written to the slave is presented on the master file descriptor as input.
-Data written to the master is presented to the slave as input.
-.P
-In practice, pseudoterminals are used for implementing terminal emulators
-such as
-.BR xterm (1),
-in which data read from the pseudoterminal master is interpreted by the
-application in the same way
-a real terminal would interpret the data, and for implementing remote-login
-programs such as
-.BR sshd (8),
-in which data read from the pseudoterminal master is sent across the network
-to a client program that is connected to a terminal or terminal emulator.
-.P
-Pseudoterminals can also be used to send input to programs that normally
-refuse to read input from pipes (such as
-.BR su (1),
-and
-.BR passwd (1)).
-.SH FILES
-.IR /dev/ptmx ,
-.I /dev/pts/*
-.SH NOTES
-The Linux support for the above (known as UNIX 98 pseudoterminal naming)
-is done using the
-.I devpts
-filesystem, which should be mounted on
-.IR /dev/pts .
-.SH SEE ALSO
-.BR getpt (3),
-.BR grantpt (3),
-.BR ptsname (3),
-.BR unlockpt (3),
-.BR pty (7)