Shell Programming and Scripting

Why would you use awk to operate on a string? The shell can manipulate strings without using an external command.

Code:

var=ABC345QWE678GFK345SA90,
newvar=${var%,}
printf "%s\n" "$newvar"

Agreed but the OP was using awk anyway to transform

Code:

UID:  ABC345QWE678GFK345SA90, LENGTH 32

into

Code:

ABC345QWE678GFK345SA90,

So you would need a bit more than that to eradicate awk, like:

Code:

ts="UID:               ABC345QWE678GFK345SA90, LENGTH 32"
ts=${ts#*:}
echo "${ts%,*}"

We can change the expansion order:

Code:

ts="UID:               ABC345QWE678GFK345SA90, LENGTH 32"
ts="${ts%,*}"
echo ${ts#*:}

or using awk

Code:

echo "UID:  ABC345QWE678GFK345SA90, LENGTH 32"|awk '{sub(",","");print $2}'

or sed

Code:

echo "UID:  ABC345QWE678GFK345SA90, LENGTH 32" | sed 's/.* \(.*\),.*/\1/'

Thanks for you replies.


I had an executable file name " uid.out" that generates following ouput when i call it from the shell script.
"Home" is the string that i passed as input to the string.

Using Prod Key
Trying to Encrypt: home
UID: 8C42A3DA2A9BFB9D8E89E4FA9C9FE161, length: 32

Now i want to extract the 8C42A3DA2A9BFB9D8E89E4FA9C9FE161 into variable.
what i did was

uid.out "Home" |grep UID >> temp.txt
=$( awk '{FS=" "} {print $2}' temp.txt)
echo "${Ecode}
produces the ouptut 8C42A3DA2A9BFB9D8E89E4FA9C9FE161,
in which I am not able to seperate Coma(,) at the end string.

What am i doing wrong?

thanks in advance.

Reddy, have you tried any of the solutions? Leaving optimizations of your code aside, there are close to a gazillion solutions to your problem in this thread. If you are having trouble choosing then just pick one.

You are not paying close attention to the scripts posted here.


Try one of these:

Code:

uid.out "Home" | awk -F '[ ,]' '/UID/ {print $2}'

or

Code:

uid.out "Home" | awk -F "[ ,]" '/UID/ {print $2}'

or

Code:

uid.out "Home" | awk 'BEGIN{FS="[ ,]"} /UID/ {print $2}'

or

Code:

uid.out "Home" | perl -lne '/^UID: (\w+),/ && print $1'

tyler_durden

Code:

uid.out |
{
 read;read             ## discard first two lines
 IFS=' ,' read a b c   ## what you want is stored in $b
 printf "%s\n" "$b"
}