08-25-2010
are you still invoking grep command from your perl script? if yes, use the m operator of Perl instead.
here's a plan that could work for you:
1. get a list of all *.txt files, using opendir and readdir
2. open multiple threads
3. in each thread, open a single file from the list and search the string using m operator, append the results in the output file
but this approach would work only if i/o sub-system is fast in your system. otherwise cpu and memory would wait for io if disks are slower.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am using a DEC ALPHA running Digital UNIX (formly DEC OSF/1) and ksh. I have a directory with hundreds of files that only share the extension .rpt. I would like to search that directory based on serial number and operation number and only files that meet both requirements to be printed out. I... (6 Replies)
Discussion started by: Anahka
6 Replies
2. Shell Programming and Scripting
I know this must be really easy, but i can't get it to work
I've got a perl script, with a file.
I want to print an empty line, and the following doesn't seem to work:
print nameoffile "\n"
thanks for your help!! (3 Replies)
Discussion started by: kfad
3 Replies
3. UNIX for Dummies Questions & Answers
Hello,
I'm trying to create a program in perl called myfind.pl;
To use the program:
(at the command line)$ program.pl keyword filename
note: the keyword is any word or regular expression
and it should display the result just like when you 'cat' the file name but with the keyword in... (2 Replies)
Discussion started by: Horizon666
2 Replies
4. Shell Programming and Scripting
Hello People,
Need some assistance/guidance.
OUTLINE:
Two files (File1 and File2)
File1 has some ids such as
009463_3922_1827
897654_8764_5432
File2 has things along the lines of:
Query= 009463_3922_1827 length=252
(252 letters)
More stufff here
... (5 Replies)
Discussion started by: Deep9000
5 Replies
5. Shell Programming and Scripting
Hi,
I have code like:
Output it is comming as:
Rels: WM2
Rels: WG2
Rels: 5
- pre/prods.pl
Rels: 6
Rels: 7
Rels: 8
Rels: 10
Rels: Int
But i want only "Rels: 5" pattern Just above "- pre/prods.pl".
By... (7 Replies)
Discussion started by: Anjan1
7 Replies
6. UNIX for Dummies Questions & Answers
Hi again
I have figured out how to be able to sort through lines in a file with multiple words in any order and display them using this command:
cat file | grep -i $OPTION1 | grep -i $OPTION2 | grep -i $OPTION3 OPTION1 is 2008, OPTION2 is Mar, OPTION 3 is Tue
Result:
Tue Mar 25... (4 Replies)
Discussion started by: semaj
4 Replies
7. UNIX for Dummies Questions & Answers
I'm attempting to use grep in Perl with very little success.
What I would like to do in Perl is get the output of the following grep code:
grep -l 'pattern' *
This gives me a list of all the files in a directory that contain the pattern that was searched.
My attempts to do this in Perl... (4 Replies)
Discussion started by: WongSifu
4 Replies
8. Shell Programming and Scripting
Hi All,
i have an output of command vmstat as below :
$ vmstat
System configuration: lcpu=4 mem=5376MB ent=1.00
kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------------------
r b avm fre re pi... (10 Replies)
Discussion started by: omkar.jadhav
10 Replies
9. BSD
I am new to unix and I would like to search multiple log files to find earliest occurrence of a text.
Ex:
Say I have 10 logs file each ending with .log and I want to find the text “CustomeError” .
I want to find the which log file “CustomeError” comes first and lines which surround’s ... (4 Replies)
Discussion started by: jim john
4 Replies
10. Shell Programming and Scripting
I am looking for help in processing of those options: '-n' or '-p'
I understand what they do and how to use them.
But, I would like to use them with more than one file (and without any shell-loop; loading the 'perl' once.)
I did try it and -n works on 2 files.
Question is:
- is it possible to... (6 Replies)
Discussion started by: alex_5161
6 Replies
lookbib(1) User Commands lookbib(1)
NAME
lookbib - find references in a bibliographic database
SYNOPSIS
lookbib database
DESCRIPTION
A bibliographic reference is a set of lines, constituting fields of bibliographic information. Each field starts on a line beginning with
a `%', followed by a key-letter, then a blank, and finally the contents of the field, which may continue until the next line starting with
`%'.
The lookbib utility uses an inverted index made by indxbib to find sets of bibliographic references. It reads keywords typed after the `>'
prompt on the terminal, and retrieves records containing all these keywords. If nothing matches, nothing is returned except another `>'
prompt.
It is possible to search multiple databases, as long as they have a common index made by indxbib(1). In that case, only the first argument
given to indxbib is specified to lookbib.
If lookbib does not find the index files (the .i[abc] files), it looks for a reference file with the same name as the argument, without the
suffixes. It creates a file with a .ig suffix, suitable for use with fgrep (see grep(1)). lookbib then uses this fgrep file to find refer-
ences. This method is simpler to use, but the .ig file is slower to use than the .i[abc] files, and does not allow the use of multiple
reference files.
FILES
x.ia
x.ib
x.ic index files
x.ig reference file
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWdoc |
+-----------------------------+-----------------------------+
SEE ALSO
addbib(1), grep(1), indxbib(1), refer(1), roffbib(1), sortbib(1), attributes(5)
BUGS
Probably all dates should be indexed, since many disciplines refer to literature written in the 1800s or earlier.
SunOS 5.10 14 Sep 1992 lookbib(1)