Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

grep can't open error

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting grep can't open error
# 1  
Old 06-30-2010
Bug grep can't open error
Hi,

Thanks for all your help. This forum is excellent. I just learnt PERL over the last few weeks by coding and asking questions....

I have one more.

When I run my script I get the following error msg. The grep statement I have is

Code:
`grep "Number of jobs processed:" output | sort -u | awk '{print $5}'`;
 
Error :-  grep: can't open output

FYI - output is a variable which points to a file name and it does point to the right file name, when I displayed the variable.

I gave the back tick to allow PERL to bypass to Shell.

What is it complaining about this statement.

When I looked around on the forums - things were mentioned about

1) removing the quotes " " - Did not work
2) Tried saying $output - Did not work, More errors showed up

Please help

Thanks
nurani
Last edited by pludi; 06-30-2010 at 02:56 PM.. Reason: code tags, please...
# 2  
Old 06-30-2010
If output is Perl variable, then it should look like that:
Code:
`grep "Number of jobs processed:" $output | sort -u | awk '{print $5}'`;

And this line of code should be assigned to some other variable, like:
Code:
$out=`grep "Number of jobs processed:" $output | sort -u | awk '{print $5}'`;

# 3  
Old 06-30-2010
Bug Split file name from relative path
Ok,

The issue seems to be that my $output comes like this (whole path)

Code:
-rw-rw-r--  1  user3  box1  99999 Jun 29 12.00 /abc/def/xyz/filename

How do I just strip the "filename" from above. Can I do an awk o this and if so how. That's what I need to grep on.

Please provide the syntax.

With this whole thing passed to the grep, I am thinking grep doesn't have a clue about it.

Am I thinking right?

Thanks
nurani
Last edited by pludi; 06-30-2010 at 02:57 PM.. Reason: code tags, please...
# 4  
Old 06-30-2010
Yes, you are thinking right. Grep is expecting path, not ls output :P. And if you are using Perl, then getting that path is simple:
Code:
@a=split " ",$output;
$output=$a[8];

Put it before call to grep, and it should work.

Or in one step:
Code:
$output=(split " ",$output)[8];

# 5  
Old 06-30-2010
Bug grep can't open error ----- Continues
Hi,

Thanks for the code. I put that in and now my $output has the file name I need to grep.

Yet, "grep can't open error" shows up

This is what I added within the loop.

Code:
       @a=split " ",$output;
       $output=$a[8];
        print "new value of output\n";
        print "$output\n";

        @a=split "/",$output;
        $output=$a[4];
        print "new value of output with slash\n";
        print "$output\n";

Again, the grep that I have coded within the loop is like this

Code:
$CTR=`grep "Number of orders processed:" output | sort -u | awk '{print $5}'`;

Anything to do with the double quote " or single quote ' that I have.

Thanks
Nurani
Last edited by pludi; 06-30-2010 at 05:18 PM.. Reason: code tags, please...
# 6  
Old 06-30-2010
You missed "$" in variable name again:
Code:
$CTR=`grep "Number of orders processed:" $output | sort -u | awk '{print $5}'`;

# 7  
Old 06-30-2010
grep can't open error ----- Continues
Sorry,

I was trying on 1 box to make it work. I copied the wrong code.

I do have the $output as you mentioned.

Code:
$CTR=`grep "Number of orders processed:" $output | sort -u | awk '{print $5}'`;

Thanks
nurani
Last edited by pludi; 06-30-2010 at 05:19 PM.. Reason: code tags, please...
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Error when using vim to open files

Hi all, 1st post here. I'm on Solaris and currently, I get the following error if I try to use vim to edit anything: Error detected while processing function <SNR>6_initialize: line 2: E697: Missing end of List ']': E116: Invalid arguments for function <SNR>6_defineOption line 3: E10:... (6 Replies)
Discussion started by: fred2028
6 Replies

2. Shell Programming and Scripting

Awk: can't open error

Hi , In a directory i've the files in the following format pay:year:mon:11789604 pay:year:mon:17675644 --- and i need to get 4th part of the above file name so i used awk command in the below code #!/bin/ksh for test_data in pay* do txt_awk = awk -F':' '{print $4;}' $test_data ... (7 Replies)
Discussion started by: smile689
7 Replies

3. Emergency UNIX and Linux Support

Error when trying to start open office

Hi all I am receivng following error while running openoffice on linux system Please suggest and linux comman which can remove this error: (I) x.org loaded video driver of... (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so (==) Depth 24 pixmap format is 32 bpp (III) ... (2 Replies)
Discussion started by: manigrover
2 Replies

4. Shell Programming and Scripting

Perl - Grep open file more then once.

Hi, I am using File::Find to go through a very large tree. I am looking for all xml files and open only those that contain a tag <Updated>. I then want to capture the contents of two tags <Old> and <New>. My problem is, after I open the file and do the first grep for <Updated> (which does... (3 Replies)
Discussion started by: OldGaf
3 Replies

5. Linux

ssmtp error : Cannot open <ip_address>:25

Hello, I am facing a problem with ssmtp mailing agent. I have installed and configured ssmtp in my RHEL5.3 system. I have written a shell script which sends mail to a couple of email id's. The script uses ssmtp to send mails. When I am running the scipt manually i.e. sh <script_name>.sh then... (3 Replies)
Discussion started by: senrooy
3 Replies

6. Red Hat

Error: Can't open display: :0.0

Hi, I get errors while running xclock from a non root user: # xclock --- this works fine # su - girish $ DISPLAY=:0.0; export DISPLAY $ xclock Xlib: connection to ":0.0" refused by server Xlib: No protocol specified Error: Can't open display: :0.0 $ I basically want to... (4 Replies)
Discussion started by: girish1428
4 Replies

7. Shell Programming and Scripting

grep: can't open /usr/dict/words

Hi All, If I use the "/usr/dict/words" inside the shell script, It is showing the error as, grep: can't open /usr/dict/words How can we resolve it? Thanks & Regards, Raja (2 Replies)
Discussion started by: Rajakct84
2 Replies

8. Shell Programming and Scripting

How to open an url and grep for a word

Hi All, I am new to shell scripting,Could any of you help me on this below :confused: -------------------- I need to write a shell script where i have open an url and grep for a particular word in the url and want to display it in a flatfile. Eg: Want to open yahoo.com and grep for yahoo... (1 Reply)
Discussion started by: sumithra
1 Replies

9. UNIX for Advanced & Expert Users

getting error when open vi editor

helo I install my product for koren language I m uisng RHEL -4 operating system now problem is whenever I open any file vi filename I got following error on the screen E557: Cannot open termcap file 'vt100' not known. Available builtin terminals are: builtin_ansi ... (1 Reply)
Discussion started by: amitpansuria
1 Replies

10. UNIX for Dummies Questions & Answers

cannot open error

Hi, Iam facing following error.please see the below script and error.Iam unable to attach error message to mail and its not sending mail also. vi Expedites_test.ksh "Expedites_test.ksh" 49 lines, 2276 characters #!/bin/ksh... (4 Replies)
Discussion started by: venu_cisco
4 Replies
Login or Register to Ask a Question