NETDEV_MASTER_UPPER_(9) Network device support NETDEV_MASTER_UPPER_(9)NAME
netdev_master_upper_dev_link - Add a master link to the upper device
int netdev_master_upper_dev_link(struct net_device * dev, struct net_device * upper_dev);
new upper device
Adds a link to device which is upper to this one. In this case, only one master upper device can be linked, although other non-master
devices might be linked as well. The caller must hold the RTNL lock. On a failure a negative errno code is returned. On success the
reference counts are adjusted and the function returns zero.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 NETDEV_MASTER_UPPER_(9)
Check Out this Related Man Page
PTY(4) BSD Kernel Interfaces Manual PTY(4)NAME
pty -- BSD-style compatibility pseudo-terminal driver
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 /dev/ttyXX.
New code should not try to allocate pseudo-terminals using this interface. 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.
SEE ALSO posix_openpt(2), pts(4), tty(4)HISTORY
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 nonexistent
master device will already cause a new master device node to be created. 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
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