sed命令用文件路径中的字符串替换字符串

Question

I want to change some string in file with content in another file

sed -i "s/##END_ALL_VHOST##/r $SERVERROOT/conf/templates/$DOMAIN.conf/g" $SERVERROOT/conf/httpd_config.conf

I need to change string ##END_ALL_VHOST## with content in file httpd_config.conf

Please help :)

Answer 1

Here's a way of doing it. Fancify the cat command as needed.

(pi51 591) $ echo "bar" > /tmp/foo.txt
(pi51 592) $ echo "alpha beta gamma" | sed "s/beta/$(cat /tmp/foo.txt)/"
alpha bar gamma

Answer 2

sed cannot operate on literal strings so it's the wrong tool to use when you want to do just that, as in your case. awk can work with strings so just use that instead:

awk '
BEGIN { old="##END_ALL_VHOST##"; lgth=length(old) }
NR==FNR { new = (NR>1 ? new ORS : "") $0; next }
s = index($0,old) { $0 = substr($0,1,s-1) new substr($0,s+lgth) }
' "$SERVERROOT/conf/templates/$DOMAIN.conf" "$SERVERROOT/conf/httpd_config.conf"

You may need to swap the order of your 2 input files, it wasn't clear from your question.