Is your system Linux? udev provides convenient symlinks for this on many systems:
If you check the udev rules that created these symlinks you can find out how udev gleans this information when creating them and make a rule that automounts for you perhaps.
now, what do you define as core files.
there are some files outthere with the name perl.core, I-core.png, core.png
I mean, are these classified as core files too??? i thought core files are simply files called "core". Please help me out
this is urgent (2 Replies)
I need to find out where a usb flash memory drive is mounted. I have used prtconf and iostat to find the information and then used popen to parse the information to find what i need. I am wondering if there are some generic functions such as ddi_ or usb_ that i can use to find such info. I would... (1 Reply)
Hello,
In a script shell, I have a variable containing the name of a file and I would like to distinguish the name from the extention of the file. For example, the file 'myfile.txt' is in a variable called $VAR. How can I obtain 2 variables, one with 'myfile' and the other with 'txt' ?
Thank you (2 Replies)
I have a file containing many records separated by a % that I would like to sort uniquely (and if possible with a count of dupes) while maintaining the integrity of each record.
File looks like this:
%
srcip: 5.6.7.8
srcburb: internal
dstip: 1.2.3.4
dstport: 2000
dstburb: external... (12 Replies)
I want to map out specific USB ports. For example if there are 7 ports on a USB hub I want to be able to identify port #2 and send a file there. How does UNIX see these ports? (1 Reply)
how to distinguish different files and choose a mode while ftp?means which modes ascii or binary for zip(.gz) ,.txt,.sh,.dat and executable as well as movie files. (1 Reply)
I am working on solaris 9. and use gmake to compile and linke c/c++ program.
anybody can tell me the distinguish between gmake and make? :confused: (10 Replies)
Hi all,
I am using ptrace to keep track of clone syscalls in a program. However, I found that the traced syscall cant be paired. for example, there are some syscalls that have entry, but without exit showing up in the traced sequences. So, is there anyway to distinguish the entry and exit of a... (0 Replies)
How to create a user account on a Linux desktop machine with restrictions on connecting to the LAN, WAN, PCMCIA ports, Firewire, CDROM and generally any user controllable output options?
I have the task to set up a machine for users working with sensitive data that should not be leaving the... (1 Reply)
Hello,
is there any command in SCO unix by which I can check if the file system is HTFS or DTFS?
Thanks (1 Reply)
Discussion started by: Mick
1 Replies
LEARN ABOUT CENTOS
usb
USB(4) BSD Kernel Interfaces Manual USB(4)NAME
usb -- Universal Serial Bus
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
device usb
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
usb_load="YES"
USERLAND PROGRAMMING
USB functions can be accessed from userland through the libusb library. See libusb(3) for more information.
DESCRIPTION
FreeBSD provides machine-independent bus support and drivers for USB devices in host and device side mode.
The usb driver has three layers:
USB Controller (Bus)
USB Device
USB Driver
The controller attaches to a physical bus like pci(4). The USB bus attaches to the controller, and the root hub attaches to the controller.
Any devices attached to the bus will attach to the root hub or another hub attached to the USB bus.
The uhub device will always be present as it is needed for the root hub.
INTRODUCTION TO USB
The USB is a system where external devices can be connected to a PC. The most common USB speeds are:
Low Speed (1.5MBit/sec)
Full Speed (12MBit/sec)
High Speed (480MBit/sec)
Each USB has a USB controller that is the master of the bus. The physical communication is simplex which means the host controller only com-
municates with one USB device at a time.
There can be up to 127 devices connected to an USB HUB tree. The addresses are assigned dynamically by the host when each device is attached
to the bus.
Within each device there can be up to 16 endpoints. Each endpoint is individually addressed and the addresses are static. Each of these
endpoints will communicate in one of four different modes: control, isochronous, bulk, or interrupt. A device always has at least one end-
point. This endpoint has address 0 and is a control endpoint and is used to give commands to and extract basic data, such as descriptors,
from the device. Each endpoint, except the control endpoint, is unidirectional.
The endpoints in a device are grouped into interfaces. An interface is a logical unit within a device; e.g. a compound device with both a
keyboard and a trackball would present one interface for each. An interface can sometimes be set into different modes, called alternate set-
tings, which affects how it operates. Different alternate settings can have different endpoints within it.
A device may operate in different configurations. Depending on the configuration, the device may present different sets of endpoints and
interfaces.
The bus enumeration of the USB bus proceeds in several steps:
1. Any interface specific driver can attach to the device.
2. If none is found, generic interface class drivers can attach.
SEE ALSO
The USB specifications can be found at:
http://www.usb.org/developers/docs/
libusb(3), usbdi(4), aue(4), axe(4), cue(4), ehci(4), kue(4), ohci(4), pci(4), rue(4), ucom(4), udav(4), uhci(4), uhid(4), ukbd(4), ulpt(4),
umass(4), ums(4), uplcom(4), urio(4), uvscom(4), usbconfig(8)STANDARDS
The usb module complies with the USB 2.0 standard.
HISTORY
The usb module has been inspired by the NetBSD USB stack initially written by Lennart Augustsson. The usb module was written by Hans Petter
Selasky <hselasky@freebsd.org>.
BSD May 20, 2009 BSD