10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
From:
1,2,3,4,5,This is a test
6,7,8,9,0,"This, is a test"
1,9,2,8,3,"This is a ""test"""
4,7,3,1,8,""""
To:
1,2,3,4,5,This is a test
6,7,8,9,0,"This; is a test"
1,9,2,8,3,"This is a ''test''"
4,7,3,1,8,"''"Is there an easy syntax I'm overlooking? There will always be an odd number... (5 Replies)
Discussion started by: Michael Stora
5 Replies
2. Shell Programming and Scripting
Hi All ,
We have source data file as csv file and since data could contain commas ,each attribute is quoted into double quotes.However problem is that some of the attributa data also contain double quotes which is converted to double double quote while creating csv file
XLs data :
... (2 Replies)
Discussion started by: Shalini Badal
2 Replies
3. Shell Programming and Scripting
hello,
I have many files called day001, day002, day003 and I want to rename them by day20070101, day20070102, etc.
I need to do it for several years and leap years as well.
What is the best way to do it ?
Thank you. (1 Reply)
Discussion started by: Ggg
1 Replies
4. UNIX for Dummies Questions & Answers
Hi All,
I have a requirement where I need to first capture the current day & move all the files from a particular directory based on a previous day.
i.e move all the files from one directory to another based on current day & a previous day. Here is what I am trying, but it gives me errors.... (2 Replies)
Discussion started by: dsfreddie
2 Replies
5. Shell Programming and Scripting
Hi,
I would like to write a script that checks if a file ('counter') was modified the previous day, if so erase its contents and write 00000000 into it.
For e.g. if the file 'counter' was last modified at 11.30pm on 24th May and the script runs at 12.15am of 25th May, it should erase it's... (1 Reply)
Discussion started by: hegdepras
1 Replies
6. Shell Programming and Scripting
i want to replace mistaken quotes in line starting with tag 300 and relocate the quote in the correct position so the input is
223;25
224;20100428064823;1;0;0;0;0;0;0;0;8;1;3;9697;18744;;;;;;;;;;;;
300;X;Event:... (3 Replies)
Discussion started by: wradwan
3 Replies
7. Shell Programming and Scripting
Hi All,
I need to find the previous month last day minus one day, using shell script. Can you guys help me to do this.
My Requirment is as below:
Input for me will be 2000909(YYYYMM)
I need the previous months last day minus 1 day timestamp. That is i need 2000908 months last day minus ... (3 Replies)
Discussion started by: girish.raos
3 Replies
8. Shell Programming and Scripting
Hi,
I've been trying to write a regex to use in egrep (in a shell script) that'll fetch the names of all the files that match a particular pattern. I expect to match the following line in a file:
Name = "abc"
The regex I'm using to match the same is:
egrep -l '(^) *= *" ** *"$' /PATH_TO_SEARCH... (6 Replies)
Discussion started by: NanJ
6 Replies
9. Shell Programming and Scripting
I have input file like
RDBMS FALIURE UTY8703 'USER_WORK.TEST' .HIghest return code '12'
I want to parse data which comed between first quote till next quote
USER_WORK.TEST
can you please suggest how to do that (4 Replies)
Discussion started by: scorp_rahul23
4 Replies
10. Shell Programming and Scripting
Hi ,
I am relatively new to unix...
Can u pls help me out to find out if the first day of the month is a working day ie from (Monday to Friday)...using Date and If clause in Korn shell..
This is very urgent.
Thanks for ur help... (7 Replies)
Discussion started by: phani
7 Replies
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
