AWK (unexpected newline or end of string)

问题

I'm trying to execute bash script but I'm got stuck.

data

$ cat test.txt 
cat,command,for
cp,command,for
ls,command,to

script

#!/bin/bash    

CUT_FILE=test.txt
TRN_GUID="1bcd1adf-2016-443b-9f00-2e4ce20726d7"
LCTN_ID="8002"
LCTN_NAME="TEST FILE"
LCTN_ADDR1="This is test"

cat $CUT_FILE | awk -F ','  '{ print  '$TRN_GUID','$LCTN_ID','$LCTN_NAME','$LCTN_ADDR1',$1,$2 }'

output

-bash-3.2# sh test4
awk: cmd. line:1: { print  1bcd1adf-2016-443b-9f00-2e4ce20726d7,8002,TEST
awk: cmd. line:1:                                                        ^ unexpected newline or end of string

desired output

 1bcd1adf-2016-443b-9f00-2e4ce20726d7,8002,"TEST FILE","This is test",cat,command

Any ideas?

回答1:

Syntax Error

You are closing your script using the single quotes.

awk -F ','  '{ print  '$TRN_GUID','$LCTN_ID','$LCTN_NAME','$LCTN_ADDR1',$1,$2 }'

Can you see, using the syntax highlighting, that the script gets closed after print '? You should use double quotation marks inside your script to prevent this, like so:

awk -F ','  '{ print "$TRN_GUID", "$LCTN_ID", "$LCTN_NAME", "$LCTN_ADDR1", $1, $2 }'

Do you notice the difference in syntax highlighting?

Undesired output

You cannot access bash variables inside awk, to accomplish this you should pass them as variables. To do that, we simply use the -v option of awk. To illustrate this point:

awk -v trn_guid="$TRN_GUID" -v lctn_id="LCTN_ID" -v lctn_name="$LCTN_NAME" -v lctn_addr1="$LCTN_ADDR1" -v arg1="$1" -v arg2="$2" -F ','  '{ print trn_guid, lctn_id, lctn_name, lctn_addr1, arg1, arg2 }'

The syntax is simply -v variable="value". You can put anything in the value, including bash variables. The variable will be accessible in the awk script using the name you chose.

回答2:

You don't need awk for this. Just use it like this in pure BASH:

CUT_FILE="test.txt"
TRN_GUID="1bcd1adf-2016-443b-9f00-2e4ce20726d7"
LCTN_ID="8002"
LCTN_NAME="TEST FILE"
LCTN_ADDR1="This is test"

while read -r line; do
   echo "$TRN_GUID,$LCTN_ID,$LCTN_NAME,$LCTN_ADDR1,${line%,*}"
done < "$CUT_FILE"

Output:

1bcd1adf-2016-443b-9f00-2e4ce20726d7,8002,TEST FILE,This is test,cat,command
1bcd1adf-2016-443b-9f00-2e4ce20726d7,8002,TEST FILE,This is test,cp,command
1bcd1adf-2016-443b-9f00-2e4ce20726d7,8002,TEST FILE,This is test,ls,command

来源：https://stackoverflow.com/questions/31097457/awk-unexpected-newline-or-end-of-string