file handling problem in perl......


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers file handling problem in perl......
# 1  
Old 06-02-2005
file handling problem in perl......

Hi,
I am opening a file......then i am wrting some data into it......and i am reopening the file again but ......i get a error cannot open file.......

$::file= "\adder\testfile.txt"
open(TEST1,$::file);
some write operation
close(TEST1)

open(TEST1,$::file) 'I GET A ERROR CAN OPEN FILE

why am i getting this?how can i rectify this?

Thanks and Regards
Vivek.S
# 2  
Old 06-02-2005
Try this to write

Code:
open(TEST1,">$file");

this is to append

Code:
open(TEST1,">>$file");

or this to read

Code:
open TEST1,"< $file" or die "Can't open $file : $!";

you get the idea.
# 3  
Old 06-02-2005
Quote:
Originally Posted by vivekshankar
$::file= "\adder\testfile.txt"
One more thing (and i think this is more likely to be the cause), \a and \t inside double quotes have their special meanings (see the perlop manpage for the list).

If you work on a Windows-based system, you should be able to replace the \ with / in Perl. You should be able to use, say

$::file = "C:/adder/testfile.txt"

instead. Then this should be okay.

EDIT:

Or you can doubly escape the \, i.e.

$::file = "C:\\adder\\testfile.txt"

Last edited by cbkihong; 06-02-2005 at 09:38 PM..
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl : How is file handling working here??

Hi, I have a perl script which is just reading from the file but what I would like to understand is how the counter is moving without using the loop in the script. Below are the details: $ more /tmp/abc.txt This is 0 This is 1 This is 2 This is 3 This is 4 This is 5 This is 6 This... (2 Replies)
Discussion started by: siddharthjindal
2 Replies

2. Shell Programming and Scripting

Perl file handling error

Hi, I am reading and file and writting each word to other file. where I have used array to store the data. I am getting below error as "Use of uninitialized value in concatenation (.) or string at customize_split_raw.pl line 51, <IN_FILE> " Where my line 51 code is 50 foreach... (8 Replies)
Discussion started by: Beginer123
8 Replies

3. Shell Programming and Scripting

PERL error handling

I have a PERL command line embedded in a UNIX script. The script doesn't handle errors coming out of this command. I'm processing large files and occassionally I run out of disk space and end up with half a file. perl -p -e 's/\n/\r\n/g' < TR_TMP_$4 > $4 How do I handle errors coming out... (1 Reply)
Discussion started by: OTChancy
1 Replies

4. Programming

Perl help for file handling

$# some text $$ some text $@ some text $$. some text Mg1 some text Mg2 some text . . . Mg10 some text The above 10 lines are to be extracted except the lines starting from $#,$$.,... (4 Replies)
Discussion started by: baig.abdul
4 Replies

5. Infrastructure Monitoring

Perl Error Handling Problem

I can get this working, but if something is down I get an error and the script does not move on. I can not get the "else" function working. What might I be doing wrong? use SNMP::Simple my %ios = (); $list="list.list"; open(DAT, $list) || die("Can't Open List"); @raw_data=<DAT>;... (4 Replies)
Discussion started by: mrlayance
4 Replies

6. Shell Programming and Scripting

file handling in perl without using system command

Hi , Is there any way to achieve following using perl program (i.e without using system command). 1.system ("echo 'test' > /usr/spool/ship.csv"); 2.system ("cat /usr/ajay_test* >> /usr/spool/RAM/work/patil.csv"); 3.system("> /usr/spool/ajay.txt"); e.g for system("rm -f... (1 Reply)
Discussion started by: ajaypatil_am
1 Replies

7. Programming

XML Handling in Perl

Hi there, I'm newby in perl and XML. I can read and parse Xml with XML-Node upper XML::Parser, but how can I create XML tags and pack my individual data in it then send through socket. PLZ lead me :) Thanks in Advance. (1 Reply)
Discussion started by: Zaxon
1 Replies

8. Shell Programming and Scripting

Perl revers File handling

Hi Experts, I have a big text file, so I want read it at eof to upper bound !. after I use a fseek to go SEEK_END, is it possible to step up upperbound? Best Regards. Note that I'm used perl script. (2 Replies)
Discussion started by: Zaxon
2 Replies

9. Shell Programming and Scripting

Signal handling in Perl

Guys, I'm doing signal handling in Perl. I'm trying to catch ^C signal inside the script. There two scripts : one shell script and one perl script. The shell script calls the perl script. For e.g. shell script a.sh and perl scipt sig.pl. Shell script a.sh looks something like this :... (6 Replies)
Discussion started by: obelix
6 Replies

10. HP-UX

Inter Process File Handling Problem

Hi All, i am running a oracle procedure which writes a file . The same file is picked up by another script which runs in a cron after every 5 minutes. Now the problem is that sometimes my script picks up a file while the procedure is still writing data in the file. is there is any way i... (4 Replies)
Discussion started by: saurabhjain
4 Replies
Login or Register to Ask a Question