06-26-2007
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
How do I get the number of seconds since 1970, within a script, for the previous day at 23:59? I need this value to pass into a sql statement to cleanup records older than the previous day at midnight. It will be automated via cron so no hard coding allowed.
Thanks! (2 Replies)
Discussion started by: captainzeb
2 Replies
2. Shell Programming and Scripting
Hello everybody, how i can get how many lines are writed in a file in the last 5 seconds?
For ezample i have 'file1' that is filled by a process automatically and i neet to know how many lines with the word 'EXACTO' were filled the last 5 seconds, can somebody help me?
I try with:
tail -f... (16 Replies)
Discussion started by: Lestat
16 Replies
3. UNIX for Dummies Questions & Answers
Any sleek way to convert seconds to hh:mm:ss format .
I know it can be done by mod and divide . Looking for a one liner if possible .
Example
3600 seconds = 01:00:00
3601 seconds = 01:00:01 (2 Replies)
Discussion started by: akrathi
2 Replies
4. Shell Programming and Scripting
Hi All
I need to convert a number of fields in a record from seconds to hh:mm:ss ( or possibly hhh:mm:ss ). I'm guessing awk is the way to go .
File has multiple records and each record contains 101 fields - can awk handle that ? The seconds values will be in fields 3 - 101 and could be 0.
... (4 Replies)
Discussion started by: Mudshark
4 Replies
5. Shell Programming and Scripting
date1=$(date +"%H:%M:%S")
date2=$(date +"01:00:54")
diff=$date2-$date1
echo $diff
How to get the time difference in seconds. (4 Replies)
Discussion started by: sandy1028
4 Replies
6. Shell Programming and Scripting
ok so, I recently started using $(echo one two three) to execute commands in scripts instead of using `echo one two three`.
This method works wonderfully on ubuntu. However, it doesn't seem to work on other unix systems, i.e redhat/sun sun solaris.
I really hate to go back to the ticks "`"... (2 Replies)
Discussion started by: SkySmart
2 Replies
7. Shell Programming and Scripting
Hi,
In my perl script I want to check whether *.csv files exist and take the count .
Below is the code:
$path = “/home/usr/jan/myfiles”
my $File_Count = `ls *.csv | wc -l `; # Checks in the current directory #Works fine if files exists.
my $File_Count = `ls $path/*.csv | wc -l `; # I need... (2 Replies)
Discussion started by: jisha
2 Replies
8. UNIX for Dummies Questions & Answers
I have file with below data
00:00:00
00:00:00
00:00:00
00:00:01
00:00:01
00:00:01
00:00:01
00:00:01
00:02:01
00:02:01
00:02:01
so on till
23:59:59
I want count of seconds for each hour and minutes
say for 00:00:00 its 3 and 00:00:01 its 5 and 00:02:01 its 3 and so on... (8 Replies)
Discussion started by: mirwasim
8 Replies
9. Shell Programming and Scripting
In one of my previous threads, someone suggested not to use backticks. When I googled, I came to know that back ticks are deprecated instead $() should be used. But I face issue while using $().
Note: I used echo of the sql just to debug.
The following is the code
#!/bin/ksh
#set -x... (5 Replies)
Discussion started by: bobbygsk
5 Replies
LEARN ABOUT DEBIAN
dbd::gofer::transport::corostream
DBD::Gofer::Transport::corostream(3pm) User Contributed Perl Documentation DBD::Gofer::Transport::corostream(3pm)
NAME
DBD::Gofer::Transport::corostream - Async DBD::Gofer stream transport using Coro and AnyEvent
SYNOPSIS
DBI_AUTOPROXY="dbi:Gofer:transport=corostream" perl some-perl-script-using-dbi.pl
or
$dsn = ...; # the DSN for the driver and database you want to use
$dbh = DBI->connect("dbi:Gofer:transport=corostream;dsn=$dsn", ...);
DESCRIPTION
The BIG WIN from using Coro is that it enables the use of existing DBI frameworks like DBIx::Class.
KNOWN ISSUES AND LIMITATIONS
- Uses Coro::Select so alters CORE::select globally
Parent class probably needs refactoring to enable a more encapsulated approach.
- Doesn't prevent multiple concurrent requests
Probably just needs a per-connection semaphore
- Coro has many caveats. Caveat emptor.
STATUS
THIS IS CURRENTLY JUST A PROOF-OF-CONCEPT IMPLEMENTATION FOR EXPERIMENTATION.
Please note that I have no plans to develop this code further myself. I'd very much welcome contributions. Interested? Let me know!
AUTHOR
Tim Bunce, <http://www.tim.bunce.name>
LICENCE AND COPYRIGHT
Copyright (c) 2010, Tim Bunce, Ireland. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
SEE ALSO
DBD::Gofer::Transport::stream
DBD::Gofer
APPENDIX
Example code:
#!perl
use strict;
use warnings;
use Time::HiRes qw(time);
BEGIN { $ENV{PERL_ANYEVENT_STRICT} = 1; $ENV{PERL_ANYEVENT_VERBOSE} = 1; }
use AnyEvent;
BEGIN { $ENV{DBI_TRACE} = 0; $ENV{DBI_GOFER_TRACE} = 0; $ENV{DBD_GOFER_TRACE} = 0; };
use DBI;
$ENV{DBI_AUTOPROXY} = 'dbi:Gofer:transport=corostream';
my $ticker = AnyEvent->timer( after => 0, interval => 0.1, cb => sub {
warn sprintf "-tick- %.2f
", time
} );
warn "connecting...
";
my $dbh = DBI->connect("dbi:NullP:");
warn "...connected
";
for (1..3) {
warn "entering DBI...
";
$dbh->do("sleep 0.3"); # pseudo-sql understood by the DBD::NullP driver
warn "...returned
";
}
warn "done.";
Example output:
$ perl corogofer.pl
connecting...
-tick- 1293631437.14
-tick- 1293631437.14
...connected
entering DBI...
-tick- 1293631437.25
-tick- 1293631437.35
-tick- 1293631437.45
-tick- 1293631437.55
...returned
entering DBI...
-tick- 1293631437.66
-tick- 1293631437.76
-tick- 1293631437.86
...returned
entering DBI...
-tick- 1293631437.96
-tick- 1293631438.06
-tick- 1293631438.16
...returned
done. at corogofer.pl line 39.
You can see that the timer callback is firing while the code 'waits' inside the do() method for the response from the database. Normally
that would block.
perl v5.14.2 2010-12-29 DBD::Gofer::Transport::corostream(3pm)