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c78beba6477e357d3f8d4745ac363483eff8078e
percona-toolkit/bin/pt-fifo-split
Daniel Nichter 39ea018581 Finish re-branding tools. Remove pt-schema-advisor.
2011-07-12 16:36:36 -06:00

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#!/usr/bin/env perl
# This program is part of Percona Toolkit: http://www.percona.com/software/
# See "COPYRIGHT, LICENSE, AND WARRANTY" at the end of this file for legal
# notices and disclaimers.
use strict;
use warnings FATAL => 'all';
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
# ###########################################################################
# OptionParser package
# This package is a copy without comments from the original. The original
# with comments and its test file can be found in the Bazaar repository at,
# lib/OptionParser.pm
# t/lib/OptionParser.t
# See https://launchpad.net/percona-toolkit for more information.
# ###########################################################################
{
package OptionParser;
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
use List::Util qw(max);
use Getopt::Long;
my $POD_link_re = '[LC]<"?([^">]+)"?>';
sub new {
my ( $class, %args ) = @_;
my @required_args = qw();
foreach my $arg ( @required_args ) {
die "I need a $arg argument" unless $args{$arg};
}
my ($program_name) = $PROGRAM_NAME =~ m/([.A-Za-z-]+)$/;
$program_name ||= $PROGRAM_NAME;
my $home = $ENV{HOME} || $ENV{HOMEPATH} || $ENV{USERPROFILE} || '.';
my %attributes = (
'type' => 1,
'short form' => 1,
'group' => 1,
'default' => 1,
'cumulative' => 1,
'negatable' => 1,
);
my $self = {
head1 => 'OPTIONS', # These args are used internally
skip_rules => 0, # to instantiate another Option-
item => '--(.*)', # Parser obj that parses the
attributes => \%attributes, # DSN OPTIONS section. Tools
parse_attributes => \&_parse_attribs, # don't tinker with these args.
%args,
strict => 1, # disabled by a special rule
program_name => $program_name,
opts => {},
got_opts => 0,
short_opts => {},
defaults => {},
groups => {},
allowed_groups => {},
errors => [],
rules => [], # desc of rules for --help
mutex => [], # rule: opts are mutually exclusive
atleast1 => [], # rule: at least one opt is required
disables => {}, # rule: opt disables other opts
defaults_to => {}, # rule: opt defaults to value of other opt
DSNParser => undef,
default_files => [
"/etc/percona-toolkit/percona-toolkit.conf",
"/etc/percona-toolkit/$program_name.conf",
"$home/.percona-toolkit.conf",
"$home/.$program_name.conf",
],
types => {
string => 's', # standard Getopt type
int => 'i', # standard Getopt type
float => 'f', # standard Getopt type
Hash => 'H', # hash, formed from a comma-separated list
hash => 'h', # hash as above, but only if a value is given
Array => 'A', # array, similar to Hash
array => 'a', # array, similar to hash
DSN => 'd', # DSN
size => 'z', # size with kMG suffix (powers of 2^10)
time => 'm', # time, with an optional suffix of s/h/m/d
},
};
return bless $self, $class;
}
sub get_specs {
my ( $self, $file ) = @_;
$file ||= $self->{file} || __FILE__;
my @specs = $self->_pod_to_specs($file);
$self->_parse_specs(@specs);
open my $fh, "<", $file or die "Cannot open $file: $OS_ERROR";
my $contents = do { local $/ = undef; <$fh> };
close $fh;
if ( $contents =~ m/^=head1 DSN OPTIONS/m ) {
MKDEBUG && _d('Parsing DSN OPTIONS');
my $dsn_attribs = {
dsn => 1,
copy => 1,
};
my $parse_dsn_attribs = sub {
my ( $self, $option, $attribs ) = @_;
map {
my $val = $attribs->{$_};
if ( $val ) {
$val = $val eq 'yes' ? 1
: $val eq 'no' ? 0
: $val;
$attribs->{$_} = $val;
}
} keys %$attribs;
return {
key => $option,
%$attribs,
};
};
my $dsn_o = new OptionParser(
description => 'DSN OPTIONS',
head1 => 'DSN OPTIONS',
dsn => 0, # XXX don't infinitely recurse!
item => '\* (.)', # key opts are a single character
skip_rules => 1, # no rules before opts
attributes => $dsn_attribs,
parse_attributes => $parse_dsn_attribs,
);
my @dsn_opts = map {
my $opts = {
key => $_->{spec}->{key},
dsn => $_->{spec}->{dsn},
copy => $_->{spec}->{copy},
desc => $_->{desc},
};
$opts;
} $dsn_o->_pod_to_specs($file);
$self->{DSNParser} = DSNParser->new(opts => \@dsn_opts);
}
return;
}
sub DSNParser {
my ( $self ) = @_;
return $self->{DSNParser};
};
sub get_defaults_files {
my ( $self ) = @_;
return @{$self->{default_files}};
}
sub _pod_to_specs {
my ( $self, $file ) = @_;
$file ||= $self->{file} || __FILE__;
open my $fh, '<', $file or die "Cannot open $file: $OS_ERROR";
my @specs = ();
my @rules = ();
my $para;
local $INPUT_RECORD_SEPARATOR = '';
while ( $para = <$fh> ) {
next unless $para =~ m/^=head1 $self->{head1}/;
last;
}
while ( $para = <$fh> ) {
last if $para =~ m/^=over/;
next if $self->{skip_rules};
chomp $para;
$para =~ s/\s+/ /g;
$para =~ s/$POD_link_re/$1/go;
MKDEBUG && _d('Option rule:', $para);
push @rules, $para;
}
die "POD has no $self->{head1} section" unless $para;
do {
if ( my ($option) = $para =~ m/^=item $self->{item}/ ) {
chomp $para;
MKDEBUG && _d($para);
my %attribs;
$para = <$fh>; # read next paragraph, possibly attributes
if ( $para =~ m/: / ) { # attributes
$para =~ s/\s+\Z//g;
%attribs = map {
my ( $attrib, $val) = split(/: /, $_);
die "Unrecognized attribute for --$option: $attrib"
unless $self->{attributes}->{$attrib};
($attrib, $val);
} split(/; /, $para);
if ( $attribs{'short form'} ) {
$attribs{'short form'} =~ s/-//;
}
$para = <$fh>; # read next paragraph, probably short help desc
}
else {
MKDEBUG && _d('Option has no attributes');
}
$para =~ s/\s+\Z//g;
$para =~ s/\s+/ /g;
$para =~ s/$POD_link_re/$1/go;
$para =~ s/\.(?:\n.*| [A-Z].*|\Z)//s;
MKDEBUG && _d('Short help:', $para);
die "No description after option spec $option" if $para =~ m/^=item/;
if ( my ($base_option) = $option =~ m/^\[no\](.*)/ ) {
$option = $base_option;
$attribs{'negatable'} = 1;
}
push @specs, {
spec => $self->{parse_attributes}->($self, $option, \%attribs),
desc => $para
. (defined $attribs{default} ? " (default $attribs{default})" : ''),
group => ($attribs{'group'} ? $attribs{'group'} : 'default'),
};
}
while ( $para = <$fh> ) {
last unless $para;
if ( $para =~ m/^=head1/ ) {
$para = undef; # Can't 'last' out of a do {} block.
last;
}
last if $para =~ m/^=item /;
}
} while ( $para );
die "No valid specs in $self->{head1}" unless @specs;
close $fh;
return @specs, @rules;
}
sub _parse_specs {
my ( $self, @specs ) = @_;
my %disables; # special rule that requires deferred checking
foreach my $opt ( @specs ) {
if ( ref $opt ) { # It's an option spec, not a rule.
MKDEBUG && _d('Parsing opt spec:',
map { ($_, '=>', $opt->{$_}) } keys %$opt);
my ( $long, $short ) = $opt->{spec} =~ m/^([\w-]+)(?:\|([^!+=]*))?/;
if ( !$long ) {
die "Cannot parse long option from spec $opt->{spec}";
}
$opt->{long} = $long;
die "Duplicate long option --$long" if exists $self->{opts}->{$long};
$self->{opts}->{$long} = $opt;
if ( length $long == 1 ) {
MKDEBUG && _d('Long opt', $long, 'looks like short opt');
$self->{short_opts}->{$long} = $long;
}
if ( $short ) {
die "Duplicate short option -$short"
if exists $self->{short_opts}->{$short};
$self->{short_opts}->{$short} = $long;
$opt->{short} = $short;
}
else {
$opt->{short} = undef;
}
$opt->{is_negatable} = $opt->{spec} =~ m/!/ ? 1 : 0;
$opt->{is_cumulative} = $opt->{spec} =~ m/\+/ ? 1 : 0;
$opt->{is_required} = $opt->{desc} =~ m/required/ ? 1 : 0;
$opt->{group} ||= 'default';
$self->{groups}->{ $opt->{group} }->{$long} = 1;
$opt->{value} = undef;
$opt->{got} = 0;
my ( $type ) = $opt->{spec} =~ m/=(.)/;
$opt->{type} = $type;
MKDEBUG && _d($long, 'type:', $type);
$opt->{spec} =~ s/=./=s/ if ( $type && $type =~ m/[HhAadzm]/ );
if ( (my ($def) = $opt->{desc} =~ m/default\b(?: ([^)]+))?/) ) {
$self->{defaults}->{$long} = defined $def ? $def : 1;
MKDEBUG && _d($long, 'default:', $def);
}
if ( $long eq 'config' ) {
$self->{defaults}->{$long} = join(',', $self->get_defaults_files());
}
if ( (my ($dis) = $opt->{desc} =~ m/(disables .*)/) ) {
$disables{$long} = $dis;
MKDEBUG && _d('Deferring check of disables rule for', $opt, $dis);
}
$self->{opts}->{$long} = $opt;
}
else { # It's an option rule, not a spec.
MKDEBUG && _d('Parsing rule:', $opt);
push @{$self->{rules}}, $opt;
my @participants = $self->_get_participants($opt);
my $rule_ok = 0;
if ( $opt =~ m/mutually exclusive|one and only one/ ) {
$rule_ok = 1;
push @{$self->{mutex}}, \@participants;
MKDEBUG && _d(@participants, 'are mutually exclusive');
}
if ( $opt =~ m/at least one|one and only one/ ) {
$rule_ok = 1;
push @{$self->{atleast1}}, \@participants;
MKDEBUG && _d(@participants, 'require at least one');
}
if ( $opt =~ m/default to/ ) {
$rule_ok = 1;
$self->{defaults_to}->{$participants[0]} = $participants[1];
MKDEBUG && _d($participants[0], 'defaults to', $participants[1]);
}
if ( $opt =~ m/restricted to option groups/ ) {
$rule_ok = 1;
my ($groups) = $opt =~ m/groups ([\w\s\,]+)/;
my @groups = split(',', $groups);
%{$self->{allowed_groups}->{$participants[0]}} = map {
s/\s+//;
$_ => 1;
} @groups;
}
if( $opt =~ m/accepts additional command-line arguments/ ) {
$rule_ok = 1;
$self->{strict} = 0;
MKDEBUG && _d("Strict mode disabled by rule");
}
die "Unrecognized option rule: $opt" unless $rule_ok;
}
}
foreach my $long ( keys %disables ) {
my @participants = $self->_get_participants($disables{$long});
$self->{disables}->{$long} = \@participants;
MKDEBUG && _d('Option', $long, 'disables', @participants);
}
return;
}
sub _get_participants {
my ( $self, $str ) = @_;
my @participants;
foreach my $long ( $str =~ m/--(?:\[no\])?([\w-]+)/g ) {
die "Option --$long does not exist while processing rule $str"
unless exists $self->{opts}->{$long};
push @participants, $long;
}
MKDEBUG && _d('Participants for', $str, ':', @participants);
return @participants;
}
sub opts {
my ( $self ) = @_;
my %opts = %{$self->{opts}};
return %opts;
}
sub short_opts {
my ( $self ) = @_;
my %short_opts = %{$self->{short_opts}};
return %short_opts;
}
sub set_defaults {
my ( $self, %defaults ) = @_;
$self->{defaults} = {};
foreach my $long ( keys %defaults ) {
die "Cannot set default for nonexistent option $long"
unless exists $self->{opts}->{$long};
$self->{defaults}->{$long} = $defaults{$long};
MKDEBUG && _d('Default val for', $long, ':', $defaults{$long});
}
return;
}
sub get_defaults {
my ( $self ) = @_;
return $self->{defaults};
}
sub get_groups {
my ( $self ) = @_;
return $self->{groups};
}
sub _set_option {
my ( $self, $opt, $val ) = @_;
my $long = exists $self->{opts}->{$opt} ? $opt
: exists $self->{short_opts}->{$opt} ? $self->{short_opts}->{$opt}
: die "Getopt::Long gave a nonexistent option: $opt";
$opt = $self->{opts}->{$long};
if ( $opt->{is_cumulative} ) {
$opt->{value}++;
}
else {
$opt->{value} = $val;
}
$opt->{got} = 1;
MKDEBUG && _d('Got option', $long, '=', $val);
}
sub get_opts {
my ( $self ) = @_;
foreach my $long ( keys %{$self->{opts}} ) {
$self->{opts}->{$long}->{got} = 0;
$self->{opts}->{$long}->{value}
= exists $self->{defaults}->{$long} ? $self->{defaults}->{$long}
: $self->{opts}->{$long}->{is_cumulative} ? 0
: undef;
}
$self->{got_opts} = 0;
$self->{errors} = [];
if ( @ARGV && $ARGV[0] eq "--config" ) {
shift @ARGV;
$self->_set_option('config', shift @ARGV);
}
if ( $self->has('config') ) {
my @extra_args;
foreach my $filename ( split(',', $self->get('config')) ) {
eval {
push @extra_args, $self->_read_config_file($filename);
};
if ( $EVAL_ERROR ) {
if ( $self->got('config') ) {
die $EVAL_ERROR;
}
elsif ( MKDEBUG ) {
_d($EVAL_ERROR);
}
}
}
unshift @ARGV, @extra_args;
}
Getopt::Long::Configure('no_ignore_case', 'bundling');
GetOptions(
map { $_->{spec} => sub { $self->_set_option(@_); } }
grep { $_->{long} ne 'config' } # --config is handled specially above.
values %{$self->{opts}}
) or $self->save_error('Error parsing options');
if ( exists $self->{opts}->{version} && $self->{opts}->{version}->{got} ) {
printf("%s Ver %s Distrib %s Changeset %s\n",
$self->{program_name}, $main::VERSION, $main::DISTRIB, $main::SVN_REV)
or die "Cannot print: $OS_ERROR";
exit 0;
}
if ( @ARGV && $self->{strict} ) {
$self->save_error("Unrecognized command-line options @ARGV");
}
foreach my $mutex ( @{$self->{mutex}} ) {
my @set = grep { $self->{opts}->{$_}->{got} } @$mutex;
if ( @set > 1 ) {
my $err = join(', ', map { "--$self->{opts}->{$_}->{long}" }
@{$mutex}[ 0 .. scalar(@$mutex) - 2] )
. ' and --'.$self->{opts}->{$mutex->[-1]}->{long}
. ' are mutually exclusive.';
$self->save_error($err);
}
}
foreach my $required ( @{$self->{atleast1}} ) {
my @set = grep { $self->{opts}->{$_}->{got} } @$required;
if ( @set == 0 ) {
my $err = join(', ', map { "--$self->{opts}->{$_}->{long}" }
@{$required}[ 0 .. scalar(@$required) - 2] )
.' or --'.$self->{opts}->{$required->[-1]}->{long};
$self->save_error("Specify at least one of $err");
}
}
$self->_check_opts( keys %{$self->{opts}} );
$self->{got_opts} = 1;
return;
}
sub _check_opts {
my ( $self, @long ) = @_;
my $long_last = scalar @long;
while ( @long ) {
foreach my $i ( 0..$#long ) {
my $long = $long[$i];
next unless $long;
my $opt = $self->{opts}->{$long};
if ( $opt->{got} ) {
if ( exists $self->{disables}->{$long} ) {
my @disable_opts = @{$self->{disables}->{$long}};
map { $self->{opts}->{$_}->{value} = undef; } @disable_opts;
MKDEBUG && _d('Unset options', @disable_opts,
'because', $long,'disables them');
}
if ( exists $self->{allowed_groups}->{$long} ) {
my @restricted_groups = grep {
!exists $self->{allowed_groups}->{$long}->{$_}
} keys %{$self->{groups}};
my @restricted_opts;
foreach my $restricted_group ( @restricted_groups ) {
RESTRICTED_OPT:
foreach my $restricted_opt (
keys %{$self->{groups}->{$restricted_group}} )
{
next RESTRICTED_OPT if $restricted_opt eq $long;
push @restricted_opts, $restricted_opt
if $self->{opts}->{$restricted_opt}->{got};
}
}
if ( @restricted_opts ) {
my $err;
if ( @restricted_opts == 1 ) {
$err = "--$restricted_opts[0]";
}
else {
$err = join(', ',
map { "--$self->{opts}->{$_}->{long}" }
grep { $_ }
@restricted_opts[0..scalar(@restricted_opts) - 2]
)
. ' or --'.$self->{opts}->{$restricted_opts[-1]}->{long};
}
$self->save_error("--$long is not allowed with $err");
}
}
}
elsif ( $opt->{is_required} ) {
$self->save_error("Required option --$long must be specified");
}
$self->_validate_type($opt);
if ( $opt->{parsed} ) {
delete $long[$i];
}
else {
MKDEBUG && _d('Temporarily failed to parse', $long);
}
}
die "Failed to parse options, possibly due to circular dependencies"
if @long == $long_last;
$long_last = @long;
}
return;
}
sub _validate_type {
my ( $self, $opt ) = @_;
return unless $opt;
if ( !$opt->{type} ) {
$opt->{parsed} = 1;
return;
}
my $val = $opt->{value};
if ( $val && $opt->{type} eq 'm' ) { # type time
MKDEBUG && _d('Parsing option', $opt->{long}, 'as a time value');
my ( $prefix, $num, $suffix ) = $val =~ m/([+-]?)(\d+)([a-z])?$/;
if ( !$suffix ) {
my ( $s ) = $opt->{desc} =~ m/\(suffix (.)\)/;
$suffix = $s || 's';
MKDEBUG && _d('No suffix given; using', $suffix, 'for',
$opt->{long}, '(value:', $val, ')');
}
if ( $suffix =~ m/[smhd]/ ) {
$val = $suffix eq 's' ? $num # Seconds
: $suffix eq 'm' ? $num * 60 # Minutes
: $suffix eq 'h' ? $num * 3600 # Hours
: $num * 86400; # Days
$opt->{value} = ($prefix || '') . $val;
MKDEBUG && _d('Setting option', $opt->{long}, 'to', $val);
}
else {
$self->save_error("Invalid time suffix for --$opt->{long}");
}
}
elsif ( $val && $opt->{type} eq 'd' ) { # type DSN
MKDEBUG && _d('Parsing option', $opt->{long}, 'as a DSN');
my $prev = {};
my $from_key = $self->{defaults_to}->{ $opt->{long} };
if ( $from_key ) {
MKDEBUG && _d($opt->{long}, 'DSN copies from', $from_key, 'DSN');
if ( $self->{opts}->{$from_key}->{parsed} ) {
$prev = $self->{opts}->{$from_key}->{value};
}
else {
MKDEBUG && _d('Cannot parse', $opt->{long}, 'until',
$from_key, 'parsed');
return;
}
}
my $defaults = $self->{DSNParser}->parse_options($self);
$opt->{value} = $self->{DSNParser}->parse($val, $prev, $defaults);
}
elsif ( $val && $opt->{type} eq 'z' ) { # type size
MKDEBUG && _d('Parsing option', $opt->{long}, 'as a size value');
$self->_parse_size($opt, $val);
}
elsif ( $opt->{type} eq 'H' || (defined $val && $opt->{type} eq 'h') ) {
$opt->{value} = { map { $_ => 1 } split(/(?<!\\),\s*/, ($val || '')) };
}
elsif ( $opt->{type} eq 'A' || (defined $val && $opt->{type} eq 'a') ) {
$opt->{value} = [ split(/(?<!\\),\s*/, ($val || '')) ];
}
else {
MKDEBUG && _d('Nothing to validate for option',
$opt->{long}, 'type', $opt->{type}, 'value', $val);
}
$opt->{parsed} = 1;
return;
}
sub get {
my ( $self, $opt ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
die "Option $opt does not exist"
unless $long && exists $self->{opts}->{$long};
return $self->{opts}->{$long}->{value};
}
sub got {
my ( $self, $opt ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
die "Option $opt does not exist"
unless $long && exists $self->{opts}->{$long};
return $self->{opts}->{$long}->{got};
}
sub has {
my ( $self, $opt ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
return defined $long ? exists $self->{opts}->{$long} : 0;
}
sub set {
my ( $self, $opt, $val ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
die "Option $opt does not exist"
unless $long && exists $self->{opts}->{$long};
$self->{opts}->{$long}->{value} = $val;
return;
}
sub save_error {
my ( $self, $error ) = @_;
push @{$self->{errors}}, $error;
return;
}
sub errors {
my ( $self ) = @_;
return $self->{errors};
}
sub usage {
my ( $self ) = @_;
warn "No usage string is set" unless $self->{usage}; # XXX
return "Usage: " . ($self->{usage} || '') . "\n";
}
sub descr {
my ( $self ) = @_;
warn "No description string is set" unless $self->{description}; # XXX
my $descr = ($self->{description} || $self->{program_name} || '')
. " For more details, please use the --help option, "
. "or try 'perldoc $PROGRAM_NAME' "
. "for complete documentation.";
$descr = join("\n", $descr =~ m/(.{0,80})(?:\s+|$)/g)
unless $ENV{DONT_BREAK_LINES};
$descr =~ s/ +$//mg;
return $descr;
}
sub usage_or_errors {
my ( $self, $file, $return ) = @_;
$file ||= $self->{file} || __FILE__;
if ( !$self->{description} || !$self->{usage} ) {
MKDEBUG && _d("Getting description and usage from SYNOPSIS in", $file);
my %synop = $self->_parse_synopsis($file);
$self->{description} ||= $synop{description};
$self->{usage} ||= $synop{usage};
MKDEBUG && _d("Description:", $self->{description},
"\nUsage:", $self->{usage});
}
if ( $self->{opts}->{help}->{got} ) {
print $self->print_usage() or die "Cannot print usage: $OS_ERROR";
exit 0 unless $return;
}
elsif ( scalar @{$self->{errors}} ) {
print $self->print_errors() or die "Cannot print errors: $OS_ERROR";
exit 0 unless $return;
}
return;
}
sub print_errors {
my ( $self ) = @_;
my $usage = $self->usage() . "\n";
if ( (my @errors = @{$self->{errors}}) ) {
$usage .= join("\n * ", 'Errors in command-line arguments:', @errors)
. "\n";
}
return $usage . "\n" . $self->descr();
}
sub print_usage {
my ( $self ) = @_;
die "Run get_opts() before print_usage()" unless $self->{got_opts};
my @opts = values %{$self->{opts}};
my $maxl = max(
map {
length($_->{long}) # option long name
+ ($_->{is_negatable} ? 4 : 0) # "[no]" if opt is negatable
+ ($_->{type} ? 2 : 0) # "=x" where x is the opt type
}
@opts);
my $maxs = max(0,
map {
length($_)
+ ($self->{opts}->{$_}->{is_negatable} ? 4 : 0)
+ ($self->{opts}->{$_}->{type} ? 2 : 0)
}
values %{$self->{short_opts}});
my $lcol = max($maxl, ($maxs + 3));
my $rcol = 80 - $lcol - 6;
my $rpad = ' ' x ( 80 - $rcol );
$maxs = max($lcol - 3, $maxs);
my $usage = $self->descr() . "\n" . $self->usage();
my @groups = reverse sort grep { $_ ne 'default'; } keys %{$self->{groups}};
push @groups, 'default';
foreach my $group ( reverse @groups ) {
$usage .= "\n".($group eq 'default' ? 'Options' : $group).":\n\n";
foreach my $opt (
sort { $a->{long} cmp $b->{long} }
grep { $_->{group} eq $group }
@opts )
{
my $long = $opt->{is_negatable} ? "[no]$opt->{long}" : $opt->{long};
my $short = $opt->{short};
my $desc = $opt->{desc};
$long .= $opt->{type} ? "=$opt->{type}" : "";
if ( $opt->{type} && $opt->{type} eq 'm' ) {
my ($s) = $desc =~ m/\(suffix (.)\)/;
$s ||= 's';
$desc =~ s/\s+\(suffix .\)//;
$desc .= ". Optional suffix s=seconds, m=minutes, h=hours, "
. "d=days; if no suffix, $s is used.";
}
$desc = join("\n$rpad", grep { $_ } $desc =~ m/(.{0,$rcol})(?:\s+|$)/g);
$desc =~ s/ +$//mg;
if ( $short ) {
$usage .= sprintf(" --%-${maxs}s -%s %s\n", $long, $short, $desc);
}
else {
$usage .= sprintf(" --%-${lcol}s %s\n", $long, $desc);
}
}
}
$usage .= "\nOption types: s=string, i=integer, f=float, h/H/a/A=comma-separated list, d=DSN, z=size, m=time\n";
if ( (my @rules = @{$self->{rules}}) ) {
$usage .= "\nRules:\n\n";
$usage .= join("\n", map { " $_" } @rules) . "\n";
}
if ( $self->{DSNParser} ) {
$usage .= "\n" . $self->{DSNParser}->usage();
}
$usage .= "\nOptions and values after processing arguments:\n\n";
foreach my $opt ( sort { $a->{long} cmp $b->{long} } @opts ) {
my $val = $opt->{value};
my $type = $opt->{type} || '';
my $bool = $opt->{spec} =~ m/^[\w-]+(?:\|[\w-])?!?$/;
$val = $bool ? ( $val ? 'TRUE' : 'FALSE' )
: !defined $val ? '(No value)'
: $type eq 'd' ? $self->{DSNParser}->as_string($val)
: $type =~ m/H|h/ ? join(',', sort keys %$val)
: $type =~ m/A|a/ ? join(',', @$val)
: $val;
$usage .= sprintf(" --%-${lcol}s %s\n", $opt->{long}, $val);
}
return $usage;
}
sub prompt_noecho {
shift @_ if ref $_[0] eq __PACKAGE__;
my ( $prompt ) = @_;
local $OUTPUT_AUTOFLUSH = 1;
print $prompt
or die "Cannot print: $OS_ERROR";
my $response;
eval {
require Term::ReadKey;
Term::ReadKey::ReadMode('noecho');
chomp($response = <STDIN>);
Term::ReadKey::ReadMode('normal');
print "\n"
or die "Cannot print: $OS_ERROR";
};
if ( $EVAL_ERROR ) {
die "Cannot read response; is Term::ReadKey installed? $EVAL_ERROR";
}
return $response;
}
if ( MKDEBUG ) {
print '# ', $^X, ' ', $], "\n";
my $uname = `uname -a`;
if ( $uname ) {
$uname =~ s/\s+/ /g;
print "# $uname\n";
}
printf("# %s Ver %s Distrib %s Changeset %s line %d\n",
$PROGRAM_NAME, ($main::VERSION || ''), ($main::DISTRIB || ''),
($main::SVN_REV || ''), __LINE__);
print('# Arguments: ',
join(' ', map { my $a = "_[$_]_"; $a =~ s/\n/\n# /g; $a; } @ARGV), "\n");
}
sub _read_config_file {
my ( $self, $filename ) = @_;
open my $fh, "<", $filename or die "Cannot open $filename: $OS_ERROR\n";
my @args;
my $prefix = '--';
my $parse = 1;
LINE:
while ( my $line = <$fh> ) {
chomp $line;
next LINE if $line =~ m/^\s*(?:\#|\;|$)/;
$line =~ s/\s+#.*$//g;
$line =~ s/^\s+|\s+$//g;
if ( $line eq '--' ) {
$prefix = '';
$parse = 0;
next LINE;
}
if ( $parse
&& (my($opt, $arg) = $line =~ m/^\s*([^=\s]+?)(?:\s*=\s*(.*?)\s*)?$/)
) {
push @args, grep { defined $_ } ("$prefix$opt", $arg);
}
elsif ( $line =~ m/./ ) {
push @args, $line;
}
else {
die "Syntax error in file $filename at line $INPUT_LINE_NUMBER";
}
}
close $fh;
return @args;
}
sub read_para_after {
my ( $self, $file, $regex ) = @_;
open my $fh, "<", $file or die "Can't open $file: $OS_ERROR";
local $INPUT_RECORD_SEPARATOR = '';
my $para;
while ( $para = <$fh> ) {
next unless $para =~ m/^=pod$/m;
last;
}
while ( $para = <$fh> ) {
next unless $para =~ m/$regex/;
last;
}
$para = <$fh>;
chomp($para);
close $fh or die "Can't close $file: $OS_ERROR";
return $para;
}
sub clone {
my ( $self ) = @_;
my %clone = map {
my $hashref = $self->{$_};
my $val_copy = {};
foreach my $key ( keys %$hashref ) {
my $ref = ref $hashref->{$key};
$val_copy->{$key} = !$ref ? $hashref->{$key}
: $ref eq 'HASH' ? { %{$hashref->{$key}} }
: $ref eq 'ARRAY' ? [ @{$hashref->{$key}} ]
: $hashref->{$key};
}
$_ => $val_copy;
} qw(opts short_opts defaults);
foreach my $scalar ( qw(got_opts) ) {
$clone{$scalar} = $self->{$scalar};
}
return bless \%clone;
}
sub _parse_size {
my ( $self, $opt, $val ) = @_;
if ( lc($val || '') eq 'null' ) {
MKDEBUG && _d('NULL size for', $opt->{long});
$opt->{value} = 'null';
return;
}
my %factor_for = (k => 1_024, M => 1_048_576, G => 1_073_741_824);
my ($pre, $num, $factor) = $val =~ m/^([+-])?(\d+)([kMG])?$/;
if ( defined $num ) {
if ( $factor ) {
$num *= $factor_for{$factor};
MKDEBUG && _d('Setting option', $opt->{y},
'to num', $num, '* factor', $factor);
}
$opt->{value} = ($pre || '') . $num;
}
else {
$self->save_error("Invalid size for --$opt->{long}");
}
return;
}
sub _parse_attribs {
my ( $self, $option, $attribs ) = @_;
my $types = $self->{types};
return $option
. ($attribs->{'short form'} ? '|' . $attribs->{'short form'} : '' )
. ($attribs->{'negatable'} ? '!' : '' )
. ($attribs->{'cumulative'} ? '+' : '' )
. ($attribs->{'type'} ? '=' . $types->{$attribs->{type}} : '' );
}
sub _parse_synopsis {
my ( $self, $file ) = @_;
$file ||= $self->{file} || __FILE__;
MKDEBUG && _d("Parsing SYNOPSIS in", $file);
local $INPUT_RECORD_SEPARATOR = ''; # read paragraphs
open my $fh, "<", $file or die "Cannot open $file: $OS_ERROR";
my $para;
1 while defined($para = <$fh>) && $para !~ m/^=head1 SYNOPSIS/;
die "$file does not contain a SYNOPSIS section" unless $para;
my @synop;
for ( 1..2 ) { # 1 for the usage, 2 for the description
my $para = <$fh>;
push @synop, $para;
}
close $fh;
MKDEBUG && _d("Raw SYNOPSIS text:", @synop);
my ($usage, $desc) = @synop;
die "The SYNOPSIS section in $file is not formatted properly"
unless $usage && $desc;
$usage =~ s/^\s*Usage:\s+(.+)/$1/;
chomp $usage;
$desc =~ s/\n/ /g;
$desc =~ s/\s{2,}/ /g;
$desc =~ s/\. ([A-Z][a-z])/. $1/g;
$desc =~ s/\s+$//;
return (
description => $desc,
usage => $usage,
);
};
sub _d {
my ($package, undef, $line) = caller 0;
@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
map { defined $_ ? $_ : 'undef' }
@_;
print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
}
1;
}
# ###########################################################################
# End OptionParser package
# ###########################################################################
# ###########################################################################
# Daemon package
# This package is a copy without comments from the original. The original
# with comments and its test file can be found in the Bazaar repository at,
# lib/Daemon.pm
# t/lib/Daemon.t
# See https://launchpad.net/percona-toolkit for more information.
# ###########################################################################
{
package Daemon;
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
use POSIX qw(setsid);
sub new {
my ( $class, %args ) = @_;
foreach my $arg ( qw(o) ) {
die "I need a $arg argument" unless $args{$arg};
}
my $o = $args{o};
my $self = {
o => $o,
log_file => $o->has('log') ? $o->get('log') : undef,
PID_file => $o->has('pid') ? $o->get('pid') : undef,
};
check_PID_file(undef, $self->{PID_file});
MKDEBUG && _d('Daemonized child will log to', $self->{log_file});
return bless $self, $class;
}
sub daemonize {
my ( $self ) = @_;
MKDEBUG && _d('About to fork and daemonize');
defined (my $pid = fork()) or die "Cannot fork: $OS_ERROR";
if ( $pid ) {
MKDEBUG && _d('I am the parent and now I die');
exit;
}
$self->{PID_owner} = $PID;
$self->{child} = 1;
POSIX::setsid() or die "Cannot start a new session: $OS_ERROR";
chdir '/' or die "Cannot chdir to /: $OS_ERROR";
$self->_make_PID_file();
$OUTPUT_AUTOFLUSH = 1;
if ( -t STDIN ) {
close STDIN;
open STDIN, '/dev/null'
or die "Cannot reopen STDIN to /dev/null: $OS_ERROR";
}
if ( $self->{log_file} ) {
close STDOUT;
open STDOUT, '>>', $self->{log_file}
or die "Cannot open log file $self->{log_file}: $OS_ERROR";
close STDERR;
open STDERR, ">&STDOUT"
or die "Cannot dupe STDERR to STDOUT: $OS_ERROR";
}
else {
if ( -t STDOUT ) {
close STDOUT;
open STDOUT, '>', '/dev/null'
or die "Cannot reopen STDOUT to /dev/null: $OS_ERROR";
}
if ( -t STDERR ) {
close STDERR;
open STDERR, '>', '/dev/null'
or die "Cannot reopen STDERR to /dev/null: $OS_ERROR";
}
}
MKDEBUG && _d('I am the child and now I live daemonized');
return;
}
sub check_PID_file {
my ( $self, $file ) = @_;
my $PID_file = $self ? $self->{PID_file} : $file;
MKDEBUG && _d('Checking PID file', $PID_file);
if ( $PID_file && -f $PID_file ) {
my $pid;
eval { chomp($pid = `cat $PID_file`); };
die "Cannot cat $PID_file: $OS_ERROR" if $EVAL_ERROR;
MKDEBUG && _d('PID file exists; it contains PID', $pid);
if ( $pid ) {
my $pid_is_alive = kill 0, $pid;
if ( $pid_is_alive ) {
die "The PID file $PID_file already exists "
. " and the PID that it contains, $pid, is running";
}
else {
warn "Overwriting PID file $PID_file because the PID that it "
. "contains, $pid, is not running";
}
}
else {
die "The PID file $PID_file already exists but it does not "
. "contain a PID";
}
}
else {
MKDEBUG && _d('No PID file');
}
return;
}
sub make_PID_file {
my ( $self ) = @_;
if ( exists $self->{child} ) {
die "Do not call Daemon::make_PID_file() for daemonized scripts";
}
$self->_make_PID_file();
$self->{PID_owner} = $PID;
return;
}
sub _make_PID_file {
my ( $self ) = @_;
my $PID_file = $self->{PID_file};
if ( !$PID_file ) {
MKDEBUG && _d('No PID file to create');
return;
}
$self->check_PID_file();
open my $PID_FH, '>', $PID_file
or die "Cannot open PID file $PID_file: $OS_ERROR";
print $PID_FH $PID
or die "Cannot print to PID file $PID_file: $OS_ERROR";
close $PID_FH
or die "Cannot close PID file $PID_file: $OS_ERROR";
MKDEBUG && _d('Created PID file:', $self->{PID_file});
return;
}
sub _remove_PID_file {
my ( $self ) = @_;
if ( $self->{PID_file} && -f $self->{PID_file} ) {
unlink $self->{PID_file}
or warn "Cannot remove PID file $self->{PID_file}: $OS_ERROR";
MKDEBUG && _d('Removed PID file');
}
else {
MKDEBUG && _d('No PID to remove');
}
return;
}
sub DESTROY {
my ( $self ) = @_;
$self->_remove_PID_file() if ($self->{PID_owner} || 0) == $PID;
return;
}
sub _d {
my ($package, undef, $line) = caller 0;
@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
map { defined $_ ? $_ : 'undef' }
@_;
print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
}
1;
}
# ###########################################################################
# End Daemon package
# ###########################################################################
# ###########################################################################
# This is a combination of modules and programs in one -- a runnable module.
# http://www.perl.com/pub/a/2006/07/13/lightning-articles.html?page=last
# Or, look it up in the Camel book on pages 642 and 643 in the 3rd edition.
#
# Check at the end of this package for the call to main() which actually runs
# the program.
# ###########################################################################
package pt_fifo_split;
use English qw(-no_match_vars);
use POSIX qw(mkfifo);
use IO::File;
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
sub main {
@ARGV = @_; # set global ARGV for this package
# ########################################################################
# Get configuration information.
# ########################################################################
my $o = new OptionParser();
$o->get_specs();
$o->get_opts();
if ( !$o->get('lines') || $o->get('lines') <= 0 ) {
$o->save_error('--lines must be a positive integer');
}
$o->usage_or_errors();
# ########################################################################
# If --pid, check it first since we'll die if it already exits.
# ########################################################################
my $daemon;
if ( $o->get('pid') ) {
# We're not daemoninzing, it just handles PID stuff. Keep $daemon
# in the the scope of main() because when it's destroyed it automatically
# removes the PID file.
$daemon = new Daemon(o=>$o);
$daemon->make_PID_file();
}
my $file = $o->get('fifo');
if ( $o->get('force') && -e $file ) {
unlink($file) or die "Can't unlink $file: $OS_ERROR";
}
mkfifo($file, 0777) or die "Can't make fifo $file: $OS_ERROR";
my $fh;
$fh = IO::File->new($file, '>') or die "Can't open $file: $OS_ERROR";
$fh->autoflush(1);
if ( $o->get('statistics') ) {
printf("%5s %9s %5s %8s %8s\n", qw(chunks lines time overall current));
}
# This is for runtime efficiency.
my $OFFSET = $o->get('offset');
my $LINES = $o->get('lines');
my $lines = 0;
my $chunks = 0;
my $start = time();
my $cstart = time();
while ( my $line = <> ) {
$lines++;
next if $OFFSET && $lines < $OFFSET;
if ( $lines % $LINES == 0 ) {
close $fh or die "Can't close: $OS_ERROR";
unlink($file) or die "Can't unlink $file: $OS_ERROR";
mkfifo($file, 0777) or die "Can't make fifo $file: $OS_ERROR";
$fh = IO::File->new($file, '>') or die "Can't open $file: $OS_ERROR";
$fh->autoflush(1);
$chunks++;
my $end = time();
if ( $o->get('statistics') ) {
my $overall = ($end - $start) || 1;
my $current = ($end - $cstart) || 1;
printf("%5d %9d %5d %5.2f %5.2f\n", $chunks, $lines, ($end - $start),
($lines / $overall), ($LINES / $current));
}
$cstart = $end;
}
print $fh $line or die "Can't print: $OS_ERROR";
}
close $fh or die "Can't close: $OS_ERROR";
unlink($file) or die "Can't unlink $file: $OS_ERROR";
return 0;
}
sub _d {
my ($package, undef, $line) = caller 0;
@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
map { defined $_ ? $_ : 'undef' }
@_;
print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
}
# ############################################################################
# Run the program.
# ############################################################################
if ( !caller ) { exit main(@ARGV); }
1; # Because this is a module as well as a script.
# ############################################################################
# Documentation
# ############################################################################
=pod
=head1 NAME
pt-fifo-split - Split files and pipe lines to a fifo without really splitting.
=head1 SYNOPSIS
Usage: pt-fifo-split [options] [FILE ...]
pt-fifo-split splits FILE and pipes lines to a fifo. With no FILE, or when FILE
is -, read standard input.
Read hugefile.txt in chunks of a million lines without physically splitting it:
pt-fifo-split --lines 1000000 hugefile.txt
while [ -e /tmp/pt-fifo-split ]; do cat /tmp/pt-fifo-split; done
=head1 RISKS
The following section is included to inform users about the potential risks,
whether known or unknown, of using this tool. The two main categories of risks
are those created by the nature of the tool (e.g. read-only tools vs. read-write
tools) and those created by bugs.
pt-fifo-split creates and/or deletes the L<"--fifo"> file. Otherwise, no other
files are modified, and it merely reads lines from the file given on the
command-line. It should be very low-risk.
At the time of this release, we know of no bugs that could cause serious harm to
users.
The authoritative source for updated information is always the online issue
tracking system. Issues that affect this tool will be marked as such. You can
see a list of such issues at the following URL:
L<http://www.percona.com/bugs/pt-fifo-split>.
See also L<"BUGS"> for more information on filing bugs and getting help.
=head1 DESCRIPTION
pt-fifo-split lets you read from a file as though it contains only some of the
lines in the file. When you read from it again, it contains the next set of
lines; when you have gone all the way through it, the file disappears. This
works only on Unix-like operating systems.
You can specify multiple files on the command line. If you don't specify any,
or if you use the special filename C<->, lines are read from standard input.
=head1 OPTIONS
This tool accepts additional command-line arguments. Refer to the
L<"SYNOPSIS"> and usage information for details.
=over
=item --config
type: Array
Read this comma-separated list of config files; if specified, this must be the
first option on the command line.
=item --fifo
type: string; default: /tmp/pt-fifo-split
The name of the fifo from which the lines can be read.
=item --force
Remove the fifo if it exists already, then create it again.
=item --help
Show help and exit.
=item --lines
type: int; default: 1000
The number of lines to read in each chunk.
=item --offset
type: int; default: 0
Begin at the Nth line. If the argument is 0, all lines are printed to the fifo.
If 1, then beginning at the first line, lines are printed (exactly the same as
0). If 2, the first line is skipped, and the 2nd and subsequent lines are
printed to the fifo.
=item --pid
type: string
Create the given PID file. The file contains the process ID of the script.
The PID file is removed when the script exits. Before starting, the script
checks if the PID file already exists. If it does not, then the script creates
and writes its own PID to it. If it does, then the script checks the following:
if the file contains a PID and a process is running with that PID, then
the script dies; or, if there is no process running with that PID, then the
script overwrites the file with its own PID and starts; else, if the file
contains no PID, then the script dies.
=item --statistics
Print out statistics between chunks. The statistics are the number of chunks,
the number of lines, elapsed time, and lines per second overall and during the
last chunk.
=item --version
Show version and exit.
=back
=head1 DOWNLOADING
Visit L<http://www.percona.com/software/> to download the latest release of
Percona Toolkit. Or, to get the latest release from the command line:
wget percona.com/latest/percona-toolkit/PKG
Replace C<PKG> with C<tar>, C<rpm>, or C<deb> to download the package in that
format. You can also get individual tools from the latest release:
wget percona.com/latest/percona-toolkit/TOOL
Replace C<TOOL> with the name of any tool.
=head1 ENVIRONMENT
The environment variable C<PTDEBUG> enables verbose debugging output to STDERR.
To enable debugging and capture all output to a file, run the tool like:
PTDEBUG=1 pt-fifo-split ... > FILE 2>&1
Be careful: debugging output is voluminous and can generate several megabytes
of output.
=head1 SYSTEM REQUIREMENTS
You need Perl, DBI, DBD::mysql, and some core packages that ought to be
installed in any reasonably new version of Perl.
=head1 BUGS
For a list of known bugs, see L<http://www.percona.com/bugs/pt-fifo-split>.
Please report bugs at L<https://bugs.launchpad.net/percona-toolkit>.
Include the following information in your bug report:
=over
=item * Complete command-line used to run the tool
=item * Tool L<"--version">
=item * MySQL version of all servers involved
=item * Output from the tool including STDERR
=item * Input files (log/dump/config files, etc.)
=back
If possible, include debugging output by running the tool with C<PTDEBUG>;
see L<"ENVIRONMENT">.
=head1 AUTHORS
Baron Schwartz
=head1 ABOUT PERCONA TOOLKIT
This tool is part of Percona Toolkit, a collection of advanced command-line
tools developed by Percona for MySQL support and consulting. Percona Toolkit
was forked from two projects in June, 2011: Maatkit and Aspersa. Those
projects were created by Baron Schwartz and developed primarily by him and
Daniel Nichter, both of whom are employed by Percona. Visit
L<http://www.percona.com/software/> for more software developed by Percona.
=head1 COPYRIGHT, LICENSE, AND WARRANTY
This program is copyright 2007-2011 Baron Schwartz, 2011 Percona Inc.
Feedback and improvements are welcome.
THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
systems, you can issue `man perlgpl' or `man perlartistic' to read these
licenses.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA.
=head1 VERSION
Percona Toolkit v1.0.0 released 2011-08-01
=cut
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