How to use variable inside awk

Question

I am trying to print the server name in HTML I wrote the below code using awk -v to do that but the server name is not printing.

awk -v server="${svr}" 'BEGIN{
FS=","
print "==============================\n"
printf "<h2>ServerName :  ${server}</h2>"
print "=============================="
print  "<HTML>""<TABLE border="1">"
}
 {
printf "<TR>"
for(i=1;i<=NF;i++)
{
printf "%s", "<td"
if ($i+0==2) printf " bgcolor=#FF3333"
    else if ($i+0==1) printf " bgcolor=#FFCC33"
    else if ($i+0==4) printf " bgcolor=#99FF33"
print ">" $i "</td>"
}
print "</TR>"
 }
END{
print "</TABLE></BODY></HTML>"
 }

it is printing ServerName : ${server} Please let me know what i am missing.

Possible duplicate of https://stackoverflow.com/questions/19075671/how-do-i-use-shell-variables-in-an-awk-script — Alejandro Blasco, Mar 13 '19 at 11:51
I checked the answer given at the link, same way i did but facing issue — Sandy, Mar 13 '19 at 12:06

Kent · Accepted Answer · 2019-03-13T12:35:01.577

3

use in this way:

print "servername:" server

or:

printf "foo: %s bar", server

edited Mar 13 '19 at 12:35

answered Mar 13 '19 at 11:46

Kent

189,393
32
233
301

i need to use inside
– Sandy Mar 13 '19 at 12:07
@Sandy well just add `
` then... `printf "foo bar %s whatever you want to add to the string", server`
– Kent Mar 13 '19 at 12:09
btw, `printf "fixstring"` without filling parameter is considered as bad practice. – Kent Mar 13 '19 at 12:11
Tried `printf "
"ServerName:%s", server
"` Error : `awk: cmd. line:4: printf "
"ServerName:%s", server
" awk: cmd. line:4: ^ syntax error` – Sandy Mar 13 '19 at 12:17
1

@Sandy ok, just take this: `printf "
ServerName:%s
", server` when I see `syntax error`, I would do a man awk/gawk to check out the right syntax of `printf` – Kent Mar 13 '19 at 12:28
Thanks Kent..it worked...:) Please update your answer so that i can accept. – Sandy Mar 13 '19 at 12:33
..........ok... – Kent Mar 13 '19 at 12:35

How to use variable inside awk

1 Answers1

` then... `printf "foo bar %s whatever you want to add to the string", server`

"ServerName:%s", server

"ServerName:%s", server

ServerName:%s