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# 1  
Old 09-09-2017
sed assistance (solved)
Hello everyone.

I am trying to replace

Code:
sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":[\"tu8tu5\",%d,\"%s\"]}\n", coinid, blockhash);

with

Code:
sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":[\"'$blckntifypass'\",%d,\"%s\"]}\n", coinid, blockhash);



this is the code I was trying but is not working

Code:
sudo sed -i 's/sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":[\"tu8tu5\",%d,\"%s\"]}\n", coinid, blockhash);/sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":[\"'$blckntifypass'\",%d,\"%s\"]}\n", coinid, blockhash);/g' blocknotify.cpp


any help is appreciated!
Last edited by crombiecrunch; 09-09-2017 at 01:56 PM.. Reason: solved
# 2  
Old 09-09-2017
Welcome to the forum.

Your request is not quite clear. Please exercise due care when phrasing your specification. Do you want to replace tu8tu5 with the string constant $blckntifypass or the respective variable's contents? Are the single quotes around it required in your result, or are they to enable shell expansion of the variable? Is that the only line in the file or has it to be selected, are there more occurrences of tu8tu5?
# 3  
Old 09-09-2017
Im sorry if I wasnt more clear. Sometimes I dont get out everything I am thinking.

But yes I am trying to replace just the one line removing the
Quote:
tu8tu5
with the variable
Quote:
$blckntifypass
which that variable is a randomly generated password.

And that is the only line in the code that needs to be changed and contains tu8tu5
# 4  
Old 09-09-2017
a bit hairy, but...
Might not be too specific as it anchors around %d
Code:
sed "s#\[.*%d#[\\\\\"\'\$blckntifypass\'\\\\\",%d#" myFile

Last edited by vgersh99; 09-09-2017 at 12:05 PM..
# 5  
Old 09-09-2017
Wouldn't
Code:
sed 's/tu8tu5/'$blckntifypass'/' file

work, then?
# 6  
Old 09-09-2017
Quote:
Originally Posted by RudiC
Wouldn't
Code:
sed 's/tu8tu5/'$blckntifypass'/' file

work, then?
bah im getting old in my old age! thank you
# 7  
Old 09-09-2017
A little bit safer (in case the password contains white space characters) and a couple of characters shorter:
Code:
sed "s/tu8tu5/$blckntifypass/" file

but, of course, neither of these will work if the expansion of the variable contains a slash character (/).
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