Shell与编程-pdf.pdf

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߸ᮁߎ⫼᠋䕧
ܹⱘੑҸ≵᳝㒧ᴳᯊˈᰒ⼎䖭Ͼ䕙ࡽᦤ⼎ヺˈᦤ⼎⫼᠋㒻㓁䕧ܹ
ੑҸⱘ݊ԭ䚼ߚˈ㔎ⳕⱘ䕙ࡽᦤ⼎ヺᰃ“>”DŽshell ব䞣
¢ 乘ᅮНব䞣
¢ 乘ᅮНব䞣੠⦃๗ব䞣Ⳍ㉏Ԑˈ᠔ϡৠⱘᰃˈ⫼᠋
া㛑ḍ᥂shell ⱘᅮНᴹՓ⫼䖭ѯব䞣ˈ㗠ϡ㛑䞡ᅮ
НᅗDŽ
¢ ᠔᳝乘ᅮНব䞣䛑ᰃ⬅$ヺ੠঺ϔϾヺো㒘៤ⱘ
$# ˖ԡ㕂খ᭄ⱘ᭄䞣
᠔᳝ԡ㕂খ᭄ⱘݙᆍ˖ *$
$? ˖ੑҸᠻ㸠ৢ䖨ಲⱘ⢊ᗕ
$$ ˖ᔧࠡ䖯⿟ⱘ䖯⿟ো
$! ˖ৢৄ䖤㸠ⱘ᳔ৢϔϾ䖯⿟ো
$0 ˖ᔧࠡᠻ㸠ⱘ䖯⿟ৡ
¢ ݊Ёˈ“$? ”⫼ѢẔᶹϞϔϾੑҸᠻ㸠ᰃ৺ℷ⹂
ব䞣᳔ᐌ㾕ⱘ⫼䗨ᰃ⫼԰Јᯊ᭛ӊⱘৡᄫҹֱ䆕” $$“ ¢
Јᯊ᭛ӊϡӮ䞡໡DŽshell ব䞣
¢ ⫼᠋ᅮНⱘব䞣
ব䞣ৡ=ব䞣ؐ ¢
declare [-afirx] ব䞣ৡ=ব䞣ؐ ¢
ব䞣ৡࠡϡᑨࡴヺো“$”ˈ೼ᓩ⫼ব䞣ⱘݙᆍᯊ߭ᑨ ¢
೼ব䞣ৡࠡࡴ“$”˗
೼㒭ব䞣䌟ؐᯊˈㄝোϸ䖍ϔᅮϡ㛑⬭ぎḐˈ㢹ব ¢
䞣Ёᴀ䑿ህࣙ৿њぎḐˈ߭ᭈϾᄫヺІ䛑㽕⫼ঠᓩ
োᣀ䍋ᴹ
⼎ᓎ䆂᠔᳝ⱘব䞣ৡ䛑⫼໻ݭᄫ↡ᴹ㸼 ¢
¢ ব䞣ⱘা䇏ᗻ˖
readly ব䞣ৡ
¢ ᭈϾshell Փ⫼ব䞣
export ব䞣ৡshell ব䞣В՟
#!/bin/bash
# Date: 2002/06/27
# Made by VBird
name=""
myname1="My name is $name"
myname2='My name is $name'
echo $name
echo $myname1
echo $myname2 : .

Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟ : .

Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟Ϣ㓪⿟ : .



ᰃ䅵ㅫᴎ⫼ᴹ㾷䞞Դ䕧ܹⱘੑҸ✊ৢއᅮ䖯㸠ԩ⾡໘⧚ⱘ⿟
ᑣDŽ
гৃҹ೼䴲ѸѦ῵ᓣϟ䇗⫼DŽ

೼
㋏㒳ϟ᳝޴Ͼϡৠⱘ
˖



 




  
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