sed如何做这个题

__lxmxn__

file1内容:

[file]
path = /var/lib/mysql
comment = mysql server

[file]
path = /var/named
comment = bind data directory

file2内容：

###
### here is a section
###

sed如何将file1编辑成如下?

###
### here is a section
###
[file]
path = /var/lib/mysql
comment = mysql server

###
### here is a section
###
[file]
path = /var/named
comment = bind data directory

yinyuemi

$ sed '/file/ {r file2
d}
/path/i\
[file] ' file1
###
### here is a section
###
[file]
path = /var/lib/mysql
comment = mysql server

###
### here is a section
###
[file]
path = /var/named
comment = bind data directory

__lxmxn__

呵呵，不够灵活

如果path是变化的，或者有多个path就不成了

yinyuemi

$ awk 'NR==FNR{a["[file]"]=$0"\n"a["[file]"] }NR>FNR{print a[$0]?a[$0]"\n"$00}' file2 file1
###
### here is a section
###

[file]
path = /var/lib/mysql
comment = mysql server

###
### here is a section
###

[file]
path = /var/named
comment = bind data directory

zzy7186

tac file2 | sed '/^\[file\]$/r file1' | tac

yinyuemi

回复 3# __lxmxn__

try this:

$ sed '/file/ {r file2
a [file]
d}' file1
###
### here is a section
###
[file]
path = /var/lib/mysql
comment = mysql server

###
### here is a section
###
[file]
path = /var/named
comment = bind data directory

yjh777

回复 1# __lxmxn__


sed '/\[file/ {:l /.*\(\n\n\|$\)/! {N; b l;}; s//###\n### xxx\n###\n&/; }'  file1

yjh777

sed "s/\[file/`   sed  ':l; N; $! b l; s/\\n/\\\\n/g'  file2  `\n&/" file1



-------------------------------------------------------------------------------------------------------
注意 ``  $() 区别， 直接$()就可以， 用``时还得将\再转义}
sed 's/\[file/'"$(   sed  ':l; N; $! b l; s/\n/\\n/g'  file2   )"'\n&/' file1

headStr=$(sed  ':l; N; $! b l; s/\n/\\n/g'  file2)
sed "s/\[file/${headStr}\\n&/" file1

__lxmxn__

嗯，多谢 yjh777 兄~

感觉可以利用sed的hold space和pattern space来做到，但最终尝试失败。

BangBull

1. sed '/\[file\]/s//###\n### here is a section\n###\n&/' urfile

复制代码