02-11-2011
Regular Expression Help [Java]
So i'm trying to write a regular expression to help me pull id numbers from a string, the input would look something like:
"Product Name" stock=6 sid=0x000000000034c000 pid=0xd70
What I'd like is a regular expression that I could enter that would return just the pid value (and one for the sid value too). The problem is I can't be sure the pid or sid will always be the same length, so rather than the input above I might get an entry that says:
"Different Product Name" stock=45 sid=0x000000000034c000 pid=0xa11713
So in the first one I'd like the expression to cut out 0xd70 and in the second one I'd like it to cut out 0xa11713. If it is any help I know that the pid is never more than 8 characters long after the 0x, and that the sid is never more than 16 (I'm not sure if shipping id can be shorter than 16 or not).
I'm new to using regular expressions, and I've figured out hot to match then number entry when I know the length, but I can't figure it out for a variable length.
input1: "Product Name" stock=6 sid=0x000000000034c000 pid=0xd70
input2: "Product Name" stock=6 sid=0x000000000034c000 pid=0xa11713
regex: pid=.....
output1: pid=0xd70
output2: pid=0xa11 <-- missing 713
Thanks for the help.
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LEARN ABOUT DEBIAN
file::pid
File::Pid(3pm) User Contributed Perl Documentation File::Pid(3pm)
NAME
File::Pid - Pid File Manipulation
SYNOPSIS
use File::Pid;
my $pidfile = File::Pid->new({
file => '/some/file.pid',
});
$pidfile->write;
if ( my $num = $pidfile->running ) {
die "Already running: $num
";
}
$pidfile->remove;
DESCRIPTION
This software manages a pid file for you. It will create a pid file, query the process within to discover if it's still running, and remove
the pid file.
new
my $pidfile = File::Pid->new;
my $thisfile = File::Pid->new({
file => '/var/run/daemon.pid',
});
my $thisfileandpid = File::Pid->new({
file => '/var/run/daemon.pid',
pid => '145',
});
This constructor takes two optional paramters.
"file" - The name of the pid file to work on. If not specified, a pid file located in "File::Spec->tmpdir()" will be created that matches
"(File::Basename::basename($0))[0] . '.pid'". So, for example, if $0 is ~/bin/sig.pl, the pid file will be /tmp/sig.pl.pid.
"pid" - The pid to write to a new pidfile. If not specified, $$ is used when the pid file doesn't exist. When the pid file does exist, the
pid inside it is used.
file
my $pidfile = $pidfile->file;
Accessor/mutator for the filename used as the pid file.
pid
my $pid = $pidfile->pid;
Accessor/mutator for the pid being saved to the pid file.
write
my $pid = $pidfile->write;
Writes the pid file to disk, inserting the pid inside the file. On success, the pid written is returned. On failure, "undef" is returned.
running
my $pid = $pidfile->running;
die "Service already running: $pid
" if $pid;
Checks to see if the pricess identified in the pid file is still running. If the process is still running, the pid is returned. Otherwise
"undef" is returned.
remove
$pidfile->remove or warn "Couldn't unlink pid file
";
Removes the pid file from disk. Returns true on success, false on failure.
program_name
This is a utility method that allows you to determine what "File::Pid" thinks the program name is. Internally this is used when no pid file
is specified.
SEE ALSO
perl.
AUTHOR
Casey West, <casey@geeknest.com>.
COPYRIGHT
Copyright (c) 2005 Casey West. All rights reserved.
This module is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.8.8 2008-04-05 File::Pid(3pm)