On my Android device there is the file called
/proc/net/unix who's content does not conform to that of any standard linux distribution (which show the unix domain sockets.) First few lines:
Num RefCount Protocol Flags Type St Inode Path 00000000: 00000002 00000000 00000000 0002 01 5287581 /data/misc/wifi/sockets/wpa_ctrl_789-3189 00000000: 00000003 00000000 00000000 0001 03 6402 /dev/socket/qmux_radio/qmux_client_socket 297 00000000: 00000002 00000000 00010000 0001 01 7180 /dev/.secure_storage/ssd_socket 00000000: 00000002 00000000 00010000 0001 01 6424 /dev/socket/cnd 00000000: 00000002 00000000 00010000 0001 01 6400 @QMulticlient ...
(1) What does these different columns stand for?
EDIT: Ok I've found this:
Here 'Num' is the kernel table slot number, 'RefCount' is the number of users of the socket, 'Protocol' is currently always 0, 'Flags' represent the internal kernel flags holding the status of the socket. Currently, type is always '1' (Unix domain data-gram sockets are not yet supported in the kernel). 'St' is the internal state of the socket and Path is the bound path (if any) of the socket.
However, that is not up-to-date as we have a
type and not clarifying what "internal state" means.
(2) Also at the end of the path, there are sometimes an additional number without its own column name. What is that?
In addition, where in the kernel source code could I expect to find where this is created?
EDIT: 2016-04-27 (Resolved)
Thanks to answer below, I've confirmed through
lsof |grep qmux, that the number in the last column for
qmux_client_sockets items, is the PID of the process using it.