问题
I need to edit these strings in a configuration file
<port>8189</port>
<service>127.0.0..1:8190</service>
<wan-access>localhost</wan-access>
I have tried
. variables.sh
cat config.sh |
sed -i.bk \
-e 's/\<^port\>\/'$port'/\<\/\port\>/' \
-e 's/\<^service\>\/'$url'/\<\/\service\>/' \
-e 's/\<^wan-access\>\/'$url2'/\<\/\wan-access\>/' config.sh
In the script the variables are supplied by the variables.sh file. Out come should be
<port>8787</port>
<service>my.domain.com:8190</service>
<wan-access>my.realdomain.com</wan-access>
回答1:
This does the trick:
port=8787
url="my.domain.com"
url2="my.realdomain.com"
sed -i.bk -Ee "s/(<port>)[0-9]+(<\/port)/\1${port}\2/" \
-e "s/(<service>)[^:]*(:.*)/\1${url}\2/" \
-e "s/localhost/${url2}/" config.sh
Output:
<port>8787</port>
<service>my.domain.com:8190</service>
<wan-access>my.realdomain.com</wan-access>
Regep Explanation:
s/ # The first substitution
(<port>) # Match the opening port tag (captured)
[0-9]+ # Match the port number (string of digits, at least one)
(<\/port) # Match the closing port tag (captured, escaped forwardslash)
/ # Replace with
\1 # The first capture group
${port} # The new port number
\2 # The second capture group
s/ # The second substitution
(<service>) # Match the opening service tag (captured)
[^:]* # Match anything not a :
(:.*) # Match everything from : (captured)
/ # Replace with
\1 # The first capture group
${url} # The new url
\2 # The second capture group
s/ # The third substitution
localhost # Match the literal string
/ # Replace with
${url2} # The other new url
The tag matching perhaps doesn't need to be so verbose but it's certainly easier for a beginner to understand.
Edit:
If you want to change the <service> port then try this:
-e "s/(<service>).*(<\/service)/\1${url}:${port}\2/"
来源：https://stackoverflow.com/questions/13574397/using-sed-to-edit-a-url-string-in-script