The bash shell uses the read loop to read the assignment in the text, the space separator problem-CodePudding

The content of the file.txt text is as follows

domain_wisgene.com  keyword谷歌搜索 - This,is,keyword,google,search,awesome    title谷歌搜索 - Google,Search,is,Awesome

code show as below

while IFS= read -r -d '' now_list_url now_list_keyword now_list_title; do
  # Do something with the variables here
    
echo "domain_name：${now_list_url}"
echo "Key words：${now_list_keyword}"
echo "title：${now_list_title}"

done <file.txt

result

#domain
domain_name：domain_wisgene.com
#keywords
Key words：keyword谷歌搜索
#title
title：- This,is,keyword,google,search,awesome   title谷歌搜索 - Google,Search,is,Awesome

wrong result

#domain
domain_name：domain_wisgene.com
#keywrods
Key words：keyword谷歌搜索 - This,is,keyword,google,search,awesome
#title
title：- This,is,keyword,google,search,awesometitle    谷歌搜索 - Google,Search,is,Awesome

I want the correct result

#domain
domain_name：domain_wisgene.com
#keywords
Key words：keyword谷歌搜索 - This,is,keyword,google,search,awesome
#title
title：title谷歌搜索 - Google,Search,is,Awesome"

Looking for help How do I solve this complicated delimiter problem, I want to use the default space as the delimiter, but there are also spaces in the variable value characters, how do I deal with the " - " in the variable without delimiting?

Example: This is one of the lines in file.txt

domain_wisgene.com keyword Google Search - This,is,keyword,google,search,awesome title Google Search - Google,Search,is,Awesome

Pass variable 1 variable 2 variable 3

Variable 1 = domain_wisgene.com
Variable 2 = keyword google search - This,is,keyword,google,search,awesome
Variable 3 = title Google Search - Google,Search,is,Awesome`

I want the correct result

domain_name：domain_wisgene.com
Key words：keyword谷歌搜索 - This,is,keyword,google,search,awesome
title：title谷歌搜索 - Google,Search,is,Awesome

CodePudding user response：

Your delimiter needs are too complex for read. You can maybe use sed to separate the fields like so:

IFS=$'\n' read -rd '' now_list_url now_list_keyword now_list_title < <(sed -E 's/^(<domain-regex>)\s (<keywords-regex>)\s (<title-regex>)$/\1\n\2\n\3/g' file.txt)

Explanation:

sed replaces \1, \2, and \3 with the text that 1st, 2nd, and 3rd parentheses-wrapped expressions captured.
I capture the 3 variables then write them again with a newline delimiter. Now they are in a format suitable for read. You can replace the newline with whatever delimiter you know won't be in the input (personally I am fond of \x1F, the Unit Separator).
\s is shorthand for any whitespace character.
You will have to fill in the <regex>s yourself as I don't know what the general rule is that you want.

CodePudding user response：

@Verpous First of all thank you very much, this is how I operate

 while IFS=$'\n' read -rd '' now_list_url now_list_keyword now_list_title < <(sed -E 's/^(<domain-regex>)\s (<keywords-regex>)\s (<title-regex>)$/\1\n\2\n\3/g' ${_site_dns_com_file}); do
  #while read -r now_list_url now_list_keyword now_list_title; do
            _deliver_site_dns_com_url="${now_list_url}" #url
            _deliver_site_dns_com_url_keyword="${now_list_keyword}" #keyword
            _deliver_site_dns_com_url_title="${now_list_title}" #title
            sleep 0.02
      echo "url：${now_list_url}"
      echo "keyword：${now_list_keyword}"
      echo "title：${now_list_title}"
      done

Can you write a complete example in code? Because tried using your way, there is no output