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Full Discussion: awk substr issue
Top Forums UNIX for Dummies Questions & Answers awk substr issue Post 302902161 by Bobby_2000 on Monday 19th of May 2014 05:13:15 AM
Old 05-19-2014
Hi,

I rewrote the code as below:
Code:
#!/bin/ksh

file2=$2
file=$1
echo file=$file
echo file2=$file2
final_string=`echo $file | awk -v file="${file}" -v file2="${file2}" '{print substr($0,length(file)-length(file2),length(file2))}'`
echo $final_string

But i am getting an error:

Code:
$ksh -x test.ksh 1234567890987 nnnn
+ file2=nnnn
+ file=1234567890987
+ echo file=1234567890987
file=1234567890987
+ echo file2=nnnn
file2=nnnn
+ + awk -v file=1234567890987 -v file2=nnnn {print substr($0,length(file)-length(file2),length(file2))}
+ echo 1234567890987
awk: syntax error near line 1
awk: bailing out near line 1
final_string=
+ echo

 

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ICONV_SUBSTR(3) 							 1							   ICONV_SUBSTR(3)

iconv_substr - Cut out part of a string

SYNOPSIS
string iconv_substr (string $str, int $offset, [int $length = iconv_strlen($str, $charset)], [string $charset = ini_get("iconv.inter- nal_encoding")]) DESCRIPTION
Cuts a portion of $str specified by the $offset and $length parameters. PARAMETERS
o $str - The original string. o $offset - If $offset is non-negative, iconv_substr(3) cuts the portion out of $str beginning at $offset'th character, counting from zero. If $offset is negative, iconv_substr(3) cuts out the portion beginning at the position, $offset characters away from the end of $str. o $length - If $length is given and is positive, the return value will contain at most $length characters of the portion that begins at $offset (depending on the length of $string). If negative $length is passed, iconv_substr(3) cuts the portion out of $str from the $offset'th character up to the character that is $length characters away from the end of the string. In case $offset is also negative, the start position is calculated beforehand according to the rule explained above. o $charset - If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding. Note that $offset and $length parameters are always deemed to represent offsets that are calculated on the basis of the character set determined by $charset, whilst the counterpart substr(3) always takes these for byte offsets. RETURN VALUES
Returns the portion of $str specified by the $offset and $length parameters. If $str is shorter than $offset characters long, FALSE will be returned. SEE ALSO
substr(3), mb_substr(3), mb_strcut(3). PHP Documentation Group ICONV_SUBSTR(3)
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