netdev_master_upper_dev_get_rcu(9) [centos man page]

NETDEV_MASTER_UPPER_(9) 				      Network device support					   NETDEV_MASTER_UPPER_(9)

NAME

       netdev_master_upper_dev_get_rcu - Get master upper device

SYNOPSIS

       struct net_device * netdev_master_upper_dev_get_rcu(struct net_device * dev);

ARGUMENTS

       dev
	   device

DESCRIPTION

       Find a master upper device and return pointer to it or NULL in case it's not there. The caller must hold the RCU read lock.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   NETDEV_MASTER_UPPER_(9)

PTM(4)							   BSD Kernel Interfaces Manual 						    PTM(4)

NAME

     ptm -- pseudo-terminal multiplexor device

SYNOPSIS

     pseudo-device pty [count]

DESCRIPTION

     The ptm driver is the backend for the /dev/ptm device.  It supports three ioctl(2)s.  The first is TIOCPTMGET, which allocates a free pseudo-
     terminal device, sets its user ID to the calling user, revoke(2)s it, and returns the opened file descriptors for both the master and the
     slave pseudo-terminal device to the caller in a struct ptmget.  This struct has the following content:

	   struct ptmget {
		   int	   cfd;
		   int	   sfd;
		   char    cn[16];
		   char    sn[16];
	   };

     where cfd and sfd contain the master resp. slave device's file descriptor and cn and sn the corresponding paths in the file system.

     The /dev/ptmx device supports two more ioctl(2)s, TIOCGRANTPT, which is used by grantpt(3), TIOCPTSNAME, which is used by ptsname(3).

     The ptm device is included with the pseudo-device pty(4).	It can be disabled by adding ``options NO_DEV_PTM'' to the kernel configuration.

FILES

     /dev/ptm			       ptm access device

     /dev/ptmx			       ptm cloning device, used to implement Unix98 ptys

SEE ALSO

     grantpt(3), openpty(3), posix_openpt(3), ptsname(3), unlockpt(3), pty(4)

HISTORY

     The /dev/ptm device appeared in OpenBSD 3.5 and was ported to NetBSD 3.0.

BSD
								 November 12, 2005							       BSD