01-18-2009
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
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... (2 Replies)
Discussion started by: vivekshankar
2 Replies
2. Shell Programming and Scripting
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
3. Programming
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
4. Shell Programming and Scripting
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
5. Shell Programming and Scripting
Hello all,
I have created a Perl script that tries to open connections to various systems on different ports in order to see if the machines are reachable, the ports are open, etc.
There appears to be a difference between Solaris (10) and Linux (RH/Oracle and Ubuntu) in the status or error it... (4 Replies)
Discussion started by: Hollinch
4 Replies
6. Shell Programming and Scripting
Hi All,
I'm pretty new to the forum and also to UNIX. I have a requirement for which I need some help. I have a script (example.script) where I get user inputs using the read command. I would need to pass the read-fetched input to a perl command (explained below) in my script. The part which... (3 Replies)
Discussion started by: bharath.gct
3 Replies
7. Programming
$# 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
8. Shell Programming and Scripting
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
9. Shell Programming and Scripting
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
10. Shell Programming and Scripting
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
FSEEK(3) 1 FSEEK(3)
fseek - Seeks on a file pointer
SYNOPSIS
int fseek (resource $handle, int $offset, [int $whence = SEEK_SET])
DESCRIPTION
Sets the file position indicator for the file referenced by $handle. The new position, measured in bytes from the beginning of the file,
is obtained by adding $offset to the position specified by $whence.
In general, it is allowed to seek past the end-of-file; if data is then written, reads in any unwritten region between the end-of-file and
the sought position will yield bytes with value 0. However, certain streams may not support this behavior, especially when they have an
underlying fixed size storage.
PARAMETERS
o $handle
-A file system pointer resource that is typically created using fopen(3).
o $offset
- The offset. To move to a position before the end-of-file, you need to pass a negative value in $offset and set $whence to
SEEK_END.
o $whence
-$whence values are:
o SEEK_SET - Set position equal to $offset bytes.
o SEEK_CUR - Set position to current location plus $offset.
o SEEK_END - Set position to end-of-file plus $offset.
RETURN VALUES
Upon success, returns 0; otherwise, returns -1.
EXAMPLES
Example #1
fseek(3) example
<?php
$fp = fopen('somefile.txt', 'r');
// read some data
$data = fgets($fp, 4096);
// move back to the beginning of the file
// same as rewind($fp);
fseek($fp, 0);
?>
NOTES
Note
If you have opened the file in append ( a or a+) mode, any data you write to the file will always be appended, regardless of the
file position, and the result of calling fseek(3) will be undefined.
Note
Not all streams support seeking. For those that do not support seeking, forward seeking from the current position is accomplished
by reading and discarding data; other forms of seeking will fail.
SEE ALSO
ftell(3), rewind(3).
PHP Documentation Group FSEEK(3)