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posix_openpt(3C)					      posix_openpt(3C)

NAME
       posix_openpt() - open a pseudo-terminal master device

SYNOPSIS
   Parameters
       oflag	 indicates  the file status flags and file access modes of the
		 open file description. Values for oflag are constructed by  a
		 bitwise-inclusive  OR	of  flags  from	 the  following	 list,
		 defined in

		 Open for reading and writing.

		 If set	   will not cause the terminal device  to  become  the
			   controlling terminal for the process.

DESCRIPTION
       The  function  establishes  a  connection between a master device for a
       pseudo-terminal and a file descriptor. This file descriptor can be used
       to  refer  that device.	The file status flags and file access modes of
       the opened file descriptor will be set according to the value of oflag.

RETURN VALUE
       Upon successful completion opens a master  pseudo-terminal  device  and
       returns	a non-negative integer representing the lowest numbered unused
       file descriptor. Otherwise, returns -1  and  is	set  to	 indicate  the
       error.

ERRORS
       On failure sets one of the following values for

       OPEN_MAX	      file  descriptors	 are  currently	 open  in  the calling
		      process.

       The maximum allowable number of files are currently open on the system.

       The value of   oflag is not valid.

       Out of pseudo-terminal resources.

       Out of STREAMS resources.

AUTHOR
       was developed by HP.

SEE ALSO
       open(2), grantpt(3C), ptsname(3C), unlockpt(3C), ptm(7), pts(7).

							      posix_openpt(3C)

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