Sponsored Content
Top Forums Shell Programming and Scripting How to assign value to a variable with row(using -n) returned by sed Post 302228699 by sourabhsharma on Monday 25th of August 2008 08:41:18 AM
Old 08-25-2008
How to assign value to a variable with row(using -n) returned by sed

Hi Friends,

REQUIREMENT: Want to delete files from the current directory match with the same in the file test.txt

set -x
i=1
echo "i=$i"
COUNT=`sed -n '$=' test.txt`
echo "Count=$COUNT"
while [ $i -lt $COUNT ]
do


"## Here is error##"
FILETOREMOVE=`sed -n \'$i,1p\' test.txt`


echo $FILETOREMOVE
rm -f $FILETOREMOVE
i=`expr $i + 1`
done

Please let me know what is right way to assign value to a variable with rows(using -n) returned by sed?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Assign the returned value of a function to a variable

Hi, Can anyone please show me how to assign the returned value of a function to a variable? Thanks. (2 Replies)
Discussion started by: trivektor
2 Replies

2. Shell Programming and Scripting

assign subst|grep|sed command result to a variable

Hi, I'm quite new to scripting and I want to modify following line of an existing script: MYVAR=`subst |grep 'L:\\\:' | sed -e 's/.*\\\//'`; What I have to do is to use the content of a variable instead of the constant expression 'L:\\\:' as the grep string to be matched. Assuming I already... (5 Replies)
Discussion started by: snowbiker99
5 Replies

3. UNIX for Dummies Questions & Answers

Assigning the output of a command to a variable, where there may be >1 line returned?

Hello I am using unix CLI commands for the Synergy CM software. The command basically searches for a folder ID and returns the names of the projects the folder sits in. The result is assigned to a variable: FIND_USE=`ccm folder -fu -u -f "%name"-"%version" ${FOLDER_ID}` When the command... (6 Replies)
Discussion started by: Glyn_Mo
6 Replies

4. Shell Programming and Scripting

assign awk's variable to shell script's variable?

Dear All, we have a command output which looks like : Total 200 queues in 30000 Kbytes and we're going to get "200" and "30000" for further process. currently, i'm using : numA=echo $OUTPUT | awk '{print $2}' numB=echo $OUTPUT | awk '{print $5}' my question is : can I use just one... (4 Replies)
Discussion started by: tiger2000
4 Replies

5. Shell Programming and Scripting

Variable not found error for a variable which is returned from stored procedure

can anyone please help me with this: i have written a shell script and a stored procedure which has one OUT parameter. now i want to use that out parameter as an input to the unix script but i am getting an error as variable not found. below are the unix scripts and stored procedure... ... (4 Replies)
Discussion started by: swap21783
4 Replies

6. Shell Programming and Scripting

Sed - using value returned by W+

Hi, In a file old.txt containing (for example) a series.. #limerick There was a young lady from Nantucket.. \images\Blank.jpg :end #joke A horse walked into a bar... \images\Blank.jpg end I would like to achieve new.txt containing #limerick There was a young lady from Nantucket..... (5 Replies)
Discussion started by: Nigel_R
5 Replies

7. Shell Programming and Scripting

check variable value when nothing is returned

Hi all, I am wondering how can I check when a variable has nothing returned in it. I am trying to store a pid in this variable to see if a script is running in the background. So I am using something like that proc_pid=`ps -ef |grep script.sh|grep -v grep|awk '{print $2}'` if then ... (1 Reply)
Discussion started by: geovas
1 Replies

8. Shell Programming and Scripting

Trim sed output & assign to variable

Hi, I have the following command that parses an xml file to read a node <port>'s value. Hoever the output comes with spaces. My requirement is to trim the spaces around the value and assign to a variable. sed -n 's|<port>\(.*\)</port>|\1|p' ../cfg.xml How do I go about it? (6 Replies)
Discussion started by: sai2013
6 Replies

9. Shell Programming and Scripting

Regex in sed to find specific pattern and assign to variable

(5 Replies)
Discussion started by: radioactive9
5 Replies

10. UNIX for Beginners Questions & Answers

How can I assign awk's variable to shell script's variable?

I have the following script, and I want to assign the output ($10 and $5) from awk to N and L: grdinfo data.grd | awk '{print $10,$5}'| read N L output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies
TEST(1) 						      General Commands Manual							   TEST(1)

NAME
test - set status according to condition SYNOPSIS
test expr DESCRIPTION
Test evaluates the expression expr. If the value is true the exit status is null; otherwise the exit status is non-null. If there are no arguments the exit status is non-null. The following primitives are used to construct expr. -r file True if the file exists (is accessible) and is readable. -w file True if the file exists and is writable. -x file True if the file exists and has execute permission. -e file True if the file exists. -f file True if the file exists and is a plain file. -d file True if the file exists and is a directory. -s file True if the file exists and has a size greater than zero. -t fildes True if the open file whose file descriptor number is fildes (1 by default) is the same file as /dev/cons. s1 = s2 True if the strings s1 and s2 are identical. s1 != s2 True if the strings s1 and s2 are not identical. s1 True if s1 is not the null string. (Deprecated.) -n s1 True if the length of string s1 is non-zero. -z s1 True if the length of string s1 is zero. n1 -eq n2 True if the integers n1 and n2 are arithmetically equal. Any of the comparisons -ne, -gt, -ge, -lt, or -le may be used in place of -eq. The (nonstandard) construct -l string, meaning the length of string, may be used in place of an integer. These primaries may be combined with the following operators: ! unary negation operator -o binary or operator -a binary and operator; higher precedence than -o ( expr ) parentheses for grouping. The primitives -b, -u, -g, and -s return false; they are recognized for compatibility with POSIX. Notice that all the operators and flags are separate arguments to test. Notice also that parentheses and equal signs are meaningful to rc and must be enclosed in quotes. EXAMPLES
Test is a dubious way to check for specific character strings: it uses a process to do what an rc(1) match or switch statement can do. The first example is not only inefficient but wrong, because test understands the purported string "-c" as an option. if (test $1 '=' "-c") echo OK # wrong! A better way is if (~ $1 -c) echo OK Test whether is in the current directory. test -f abc -o -d abc SOURCE
/sys/src/cmd/test.c SEE ALSO
rc(1) TEST(1)
All times are GMT -4. The time now is 10:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy