cat /sys/devices/platform/macb/net/eth0/ctrl and the output is 43, and this number changes everytime I want to read.
sysfs is the virtual file system from the kernel that is exported to user-space. I want to know what are those numbers are?
EDIT: I'm using Linux kernel 3.10.105 and it's the Busybox Unix tools I use.
Below is the ls of network interface dir.
ls /sys/devices/platform/macb/net/eth0/ addr_assign_type broadcast dev_id duplex ifindex macb-ffffffff netdev_group speed tx_queue_len addr_len carrier device flags iflink macb-ffffffff:00 operstate statistics type address ctrl dormant ifalias link_mode mtu queues subsystem uevent