sed替换匹配问题.

kingdomkiss

文件内容为:
name="something" type="something" ip="1234234" user="user1" password="password" name="something"
name="something" type="something" ip="1234244" username="user2" password="password" other="something"

1. sed 's/\(username=\)\|\(user=\)".*"\(\s*pa\)/(\2)(\1)("'$USER'")111(\3)/' user

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得到如下:
name="something" type="something" ip="1234234" (user=)()("king")111(pa)ssword" name="something"
name="something" type="something" ip="1234244" ()(username=)("king")111()"user2" password="password" other="something"
两行的内容格式基本一样,从得到第一行的结果看\(\s*pa\)匹配到了pa,第二行为什么都没匹配到,是空的呢? 有没有人提示下

yinyuemi

try:

1. sed 's/\(username=\|user=\)".*"\(\s*pass\)/(\1)("'$USER'")111(\2)/'

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kingdomkiss

回复 2# yinyuemi

its works.第一次写这种带或匹配的,忘了当初为什么把他们分开写了.现在仔细分析下确实是大不一样.
\(username=\)  \| \(user=\)".*"\(\s*pa\) 是这两个或匹配的.

db2-zhang

回复 1# kingdomkiss


    echo 'name="something" type="something" ip="1234234" user="user1" password="password" name="something"
name="something" type="something" ip="1234244" username="user2" password="password" other="something" '|sed 's/\(user=\|username=\).* \(pa\)\(.*\)/(\1)("$user")111(\2)\3/g'
name="something" type="something" ip="1234234" (user=)(king)111(pa)ssword="password" name="something"
name="something" type="something" ip="1234244" (username=)(king)111(pa)ssword="password" other="something"