高效awk编程第3版 $3 读入文件

况天佑

? How Input Is Split into Records
? Examining Fields
? Non-constant Field Numbers
? Changing the Contents of a Field
? Specifying How Fields Are Separated
? Reading Fixed-Width Data
? Multiple-Line Records
? Explicit Input with getline

默认以换行为分隔记录的符号,是可以改变的,以下改为用/分隔.
[root@Meil89 awk]# awk 'BEGIN { RS = "/" }
> { print $0 }' BBS-list
aardvark 555-5553 1200
300 B
alpo-net 555-3412 2400
1200
300 A

通过命令行也可以改记录分隔符:
[root@Meil89 awk]# awk '{ print $0 }' RS="/" BBS-list
aardvark 555-5553 1200
300 B
alpo-net 555-3412 2400