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Shell Programming and Scripting

Remove appending 0 from file variable

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Top Forums Shell Programming and Scripting Remove appending 0 from file variable
# 1  
Old 05-16-2013
RedHat Remove appending 0 from file variable
Dear All,

i have filename RYK3201_032001002.pdf

and i am using below command to get a file

Code:
file_name1=$(echo $file_name | cut -d "_" -f2 | cut -d "." -f1 | cut -c -6)

and then
Code:
file_name2=${NewFile_NAME}_$file_name1

now the value of file_name1 will be 032001

i want to file_name1 should be 32001 means remove all prefix 0 even if there are more than one 0.

here the point should be considered that if there is no prefix 0 it should not replace next zero in string

if somebody have idea please share



---------- Post updated at 09:26 AM ---------- Previous update was at 09:06 AM ----------

I used this but it is just replacing first occurance but not all
Code:
sed 's/^0\(.*\)/\1/'

Last edited by Scrutinizer; 05-16-2013 at 11:28 AM.. Reason: code tags placement + extra code tags
# 2  
Old 05-16-2013
Try:
Code:
sed 's/.*_0*//; s/...\..*$//'

# 3  
Old 05-16-2013
Code:
file_name="RYK3201_032001002.pdf"
file_name=$(awk -F_ '{print substr($2,0,7)+0}' <<<$file_name)
echo $file_name
32001

# 4  
Old 05-16-2013
RedHat
Quote:
Originally Posted by Scrutinizer
Try:
Code:
sed 's/.*_0*//; s/...\..*$//'

thanks but i got below output

Code:
$ echo RYK3201_0003200121.pdf | cut -d "_" -f2 | cut -d "." -f1 | cut -c -6 | sed 's/.*_0*//; s/...\..*$//'
000320

# 5  
Old 05-16-2013
Code:
$ echo RYK3201_0003200121.pdf |sed 's/.*_0*//; s/..\..*$//'
32001

# 6  
Old 05-16-2013
With a Korn shell with a version later than 1988 and with a current bash, you can also do this just using variable expansions built into the shell:
Code:
file_name=RYK3201_032001002.pdf
NewFile_NAME=NFN
file_name1=${file_name##*_}             # discard RYK3201_
file_name1=${file_name1%.*}             # discard .pdf
file_name1=${file_name1:0:6}            # keep 1st 6 characters
file_name1=${file_name1##0}             # discard leading zeros
file_name2="${NewFile_NAME}_$file_name1"
printf "original: %s, file_name1: %s, file_name2: %s\n" "$file_name" "$file_name1" "$file_name2"

which produces:
Code:
original: RYK3201_032001002.pdf, file_name1: 32001, file_name2: NFN_32001

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