unix shell programming loop example
Learning the bash shell - unix shell programming
Ngày tải lên :
19/03/2014, 13:38
... similar shells,
including the standard Bourne shell, the POSIX shell
standard, the Korn shell (ksh), the public-domain Korn
shell (pdksh), and the Z Shell (zsh).
Appendix B contains lists of shell ... Parallelization
8.6. Subshells
8.6.1. Subshell Inheritance
8.6.2. Nested Subshells
8.7. Process Substitution
9. Debugging Shell Programs
9
Intended Audience
This book is designed to address casual UNIX and ... programmable
completion.
23
1.1. What Is a Shell?
1.2. Scope of This Book
1.3. History of UNIX Shells
1.3.1. The Bourne Again Shell
1.3.2. Features of bash
1.4. Getting bash
1.5. Interactive Shell Use
1.5.1. Commands,...
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shell programming in unix
Ngày tải lên :
09/05/2014, 08:45
... commands
"
if cond ; then
!
Shell in UNIX
"
#
"
$%
Chương trình shell
"
&
"
'()*&+&,)-./
"
01&+&&23&4
567
89+
:;
...
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VHDL Programming by Example 4th Edition
Ngày tải lên :
16/08/2012, 08:46
... 40
Process Example 40
Signal Assignment Versus Variable Assignment 42
Incorrect Mux Example 43
Correct Mux Example 45
Sequential Statements 46
IF Statements 47
CASE Statements 48
LOOP Statements ... the preceding example, the key-
words are
ENTITY
,
IS
,
PORT
,
IN
,
INOUT
, and so on. The standard type pro-
vided is
BIT
. Names of user-created objects such as
mux
, in the example
above, ... the
language and examples used throughout the book.
In the first section VHDL features are introduced one or more at a time.
As each feature is introduced, one or more real examples are given...
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Foreword và Predace của VHDL Programming by Example 4th Edition_01
Ngày tải lên :
29/09/2013, 19:20
... Preface
xvi
range of types available for use in VHDL. Examples are given for each of
the types showing how they would be used in a real example. In Chapter
5 the concepts of subprograms and packages ... five kinds of VHDL attributes. Each attribute
kind has examples describing how to use the specific attribute to the
designer’s best advantage. Examples are given which describe the pur-
pose of ... the
language and examples used throughout the book.
In the first section VHDL features are introduced one or more at a time.
As each feature is introduced, one or more real examples are given...
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Shell Programming
Ngày tải lên :
19/10/2013, 02:20
... Systems Administration Chapter 9: Shell Programming
Page 178
Chapter
Shell Programming
Introduction
Shell programming - WHY?
While it is very nice to have a shell at which you can issue commands, ... shell scripts, you can't modify or fix the start up
process.
Shell programming - WHAT?
A shell program (sometimes referred to as a shell script) is a text file containing shell
and UNIX ... written for the Bourne shell (
sh/bash
) will not
run in the
C
shell (
csh
). All the examples in this chapter are written for the Bourne
shell.
Shell programming - HOW?
Shell programs are...
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Shell programming
Ngày tải lên :
04/01/2014, 12:53
... lệnh set hoặc env. Một vài biến hệ thống quan trọng:
BASH=/bin/bash - tên shell.
BASH_VERSION=1.14.7(1) - phiên bản của shell.
COLUMNS=80 - số cột cho màn hình.
HOME=/home/vivek - thư mục nhà.
LINES=25 ... dẫn.
PS1=[\u@\h \W]\$ - thiết lập prompt.
PWD=/home/students/Common - thư mục hiện hành.
SHELL= /bin/bash - tên shell.
USERNAME=vivek - user nào hiện đang đăng nhập vào PC.
Bạn có thể in ra bất kỳ ... kết thúc (exit status):
Mặc định trong Linux nếu lệnh /shell script được thực thi, nó sẽ trả về hai loại giá trị - được sử dụng để xem
lệnh /shell script được thực thi thành công hay không.
1. Nếu...
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Tài liệu Programming by Example docx
Ngày tải lên :
19/01/2014, 09:20
... 40
Process Example 40
Signal Assignment Versus Variable Assignment 42
Incorrect Mux Example 43
Correct Mux Example 45
Sequential Statements 46
IF Statements 47
CASE Statements 48
LOOP Statements ... way to map that functionality
to either sequential or combinational logic.
Process Example
Let’s look at an example of a process statement in an architecture to see
how the process statement ... Preface
xvi
range of types available for use in VHDL. Examples are given for each of
the types showing how they would be used in a real example. In Chapter
5 the concepts of subprograms and packages...
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Unix network programming volume 1
Ngày tải lên :
19/03/2014, 13:36
... Stevens/Bill Fenner/Andrew M. Rudoff,
UNIX Network Programming Volume 1,
Third Edition: The Sockets Networking API
W. Richard Stevens,
Advanced Programming in the UNIX Environment
W. Richard Stevens, ... environment:
UNIX Network Programming, Volume 1, Third Edition
.
Building on the legendary work of W. Richard Stevens, this edition has been fully updated by
two leading network programming experts ... environment:
UNIX Network Programming, Volume 1, Third Edition
.
Building on the legendary work of W. Richard Stevens, this edition has been fully updated by
two leading network programming experts...
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Koenig, moo accelerated c++ practical programming by example
Ngày tải lên :
19/03/2014, 14:10
... Series
Accelerated C++: Practical Programming by Example, Andrew Koenig
and Barbara E. Moo
Essential C++, Stanley B. Lippman
Exceptional C++; 47 Engineering Puzzles, Programming Problems,
and Solutions, ... write an asterisk. Moreover, we can use our knowledge of the loop
invariants to determine whether it is time to write an asterisk.
For example, if r is zero, we know from the invariant that we have ... used to understand this loop will come in handy in a variety of contexts.
The general idea is to find an invariant that states a relevant property of the variables that the
loop involves (we have...
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