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    The following form allows you to view linux man pages.

    Command:

    forkpty

    
    
    

    SYNOPSIS

           #include <pty.h>
    
           int openpty(int *amaster, int *aslave, char *name,
                       const struct termios *termp,
                       const struct winsize *winp);
    
           pid_t forkpty(int *amaster, char *name,
                         const struct termios *termp,
                         const struct winsize *winp);
    
           #include <utmp.h>
    
           int login_tty(int fd);
    
           Link with -lutil.
    
    
    

    DESCRIPTION

           The  openpty()  function  finds an available pseudoterminal and returns
           file descriptors for the master and slave in amaster  and  aslave.   If
           name  is  not  NULL, the filename of the slave is returned in name.  If
           termp is not NULL, the terminal parameters of the slave will be set  to
           the values in termp.  If winp is not NULL, the window size of the slave
           will be set to the values in winp.
    
           The login_tty() function prepares for a login on the terminal fd (which
           may  be  a  real  terminal  device, or the slave of a pseudoterminal as
           returned by openpty()) by creating a new session, making  fd  the  con-
           trolling  terminal  for the calling process, setting fd to be the stan-
           dard input, output, and error streams of the current process, and clos-
           ing fd.
    
           The  forkpty() function combines openpty(), fork(2), and login_tty() to
           create a new process operating in a pseudoterminal.  The file  descrip-
           tor  of  the  master side of the pseudoterminal is returned in amaster,
           and the filename of the slave in name if it is not NULL.  The termp and
           winp arguments, if not NULL, will determine the terminal attributes and
           window size of the slave side of the pseudoterminal.
    
    
    

    RETURN VALUE

           If a call to openpty(), login_tty(), or forkpty() is not successful, -1
           is  returned  and  errno  is  set  to  indicate  the error.  Otherwise,
           openpty(), login_tty(), and the child process of  forkpty()  return  0,
           and the parent process of forkpty() returns the process ID of the child
           process.
    
    
    

    ERRORS

           openpty() will fail if:
    
           ENOENT There are no available terminals.
    
           login_tty() will fail if ioctl(2) fails to set fd  to  the  controlling
           open  a  UNIX  98  pseudoterminal pair, and falls back to opening a BSD
           pseudoterminal pair if that fails.
    
    
    

    BUGS

           Nobody knows how much space should be reserved for name.   So,  calling
           openpty() or forkpty() with non-NULL name may not be secure.
    
    
    

    SEE ALSO

           fork(2), ttyname(3), pty(7)
    
    
    

    GNU 2010-06-13 OPENPTY(3)

    
    
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