bash Reference Manual 一书中的newline是一个blank metacharacter吗？

millerixlee

在bash reference manual 一书开头处的chapter 2 Definitions（英文版page3 ）一章中给出了metacharactor， operator， control operator的定义：
1. metacharacter：
A character that, when unquoted, separates words. A metacharacter is a blank or one of the following characters: ‘|’, ‘&’, ‘;’, ‘(’, ‘)’, ‘<’, or ‘>’.

2. operator：
A control operator or a redirection operator. See Section 3.6 [Redirections], page 26, for a list of redirection operators. Operators contain at least one unquoted metacharacter.

3. control operator
A token that performs a control function. It is a newline or one of the following: ‘||’, ‘&&’, ‘&’, ‘;’, ‘;;’, ‘|’, ‘|&’, ‘(’, or ‘)’.

问题： 控制操作符 newline 包含哪几个 metacharater， 或者这样问：newline到底用什么metacharater表示？
我考虑至少要包含一个blank。

millerixlee

没人懂？bigbull在哪？

yinyuemi

回复 1# millerixlee


   

DEFINITIONS
       The following definitions are used throughout the rest of this document.
       blank  A space or tab.
       word   A sequence of characters considered as a single unit by the shell.  Also known as a token.
       name   A  word  consisting only of alphanumeric characters and underscores, and beginning with an alpha-
              betic character or an underscore.  Also referred to as an identifier.
       metacharacter
              A character that, when unquoted, separates words.  One of the following:
              |  & ; ( ) < > space tab
       control operator
              A token that performs a control function.  It is one of the following symbols:
              || & && ; ;; ( ) | <newline>

Shell_HAT

2012-05-27 20:01:08
2012-05-27 21:40:59
这段时间高帅富们一般不是在啪啪啪就是在去往啪啪啪的路上，你要淡定。

yinyuemi

回复 4# Shell_HAT


   

blackold

newline 就是newline 啊，还需要用什么来表示？

millerixlee

各位看第二个定义 operator最后一句话：Operators contain at least one unquoted metacharacter. 意思是operator 包含至少一个metacharacter。而newline是一个 control operator， control operator 也是 operator， 那么newline 是不是包含至少一个 metacharacter 啊。那么 newline 他包含了哪个metacharactor？

millerixlee

回复 4# Shell_HAT
大哥说的极是， 小弟求解心切， 就没在意高伏帅的作息时间。。。