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xcat-core/xCAT-client/bin/xdshbak

396 lines
11 KiB
Perl
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#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#####################################################################
BEGIN
{
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : -d '/opt/xcat' ? '/opt/xcat' : '/usr';
}
use lib "$::XCATROOT/lib/perl";
use xCAT::MsgUtils;
use xCAT::DSHCLI;
use locale;
use Getopt::Std;
eval "use Sort::Versions qw/versioncmp/; 1;" or *versioncmp = sub ($$) { ($a,$b)= @_ ; return $a cmp $b };
#####################################################################
# #
# Module: xdshbak #
# #
#-------------------------------------------------------------------#
# #
# Description: Filters output from multiple nodes by listing #
# each distinct set of lines only once, or formats #
# output from multiple nodes preceded by the hostname #
# #
# Inputs: #
# -b : bare output, don't prepend hostname per line. only with -x #
# -c : list distinct output only once #
# -h : usage #
# -x : omit extra header output for each node. #
# Can not be used with -c. #
# -q : quiet mode #
# #
# Ouputs: #
# Filtered output #
# #
# Syntax (example): #
# xdsh host1,host2 -vi ls | xdshbak #
# #
# External Ref: None #
# #
# Internal Ref: None #
# #
#####################################################################
#-----------------------------------------------------------------------------
#
# Main line code. First, error checking.
#
#-----------------------------------------------------------------------------
$::dsh_command = 'xdshbak';
#
# Process the command line...
#
if (!getopts('bcxhq'))
{ # Gather options; if errors
&d_syntax;
exit(-1);
}
if ($::opt_h)
{
&d_syntax;
exit(0);
}
if ($::opt_c && $::opt_x)
{
&d_syntax;
exit(-1);
} # these 2 options are mutually exclusive
if ($::opt_b && !($::opt_x)) {
&d_syntax;
exit(-1);
} # -b only makes sense with -x
if ($::opt_c)
{
$compress++;
}
if ($::opt_q)
{
$quiet++;
}
#
# Read stdin until eof. If compaction is not specified, create an array
# of the following data structures, one element per host:
#
# hostname: line1.line2...linen
#
# newlines are left in.
#
# If compaction is specified, create a binary tree with one element per
# distinct hostname output. Associated with each tree element is an
# string of hostnames. Each of these hostnames had output corresponding
# to the line1.sepchar.line2.sepchar.....linen element in the tree.
#
#
# Input is hostname: line
#
# Assumption is made that all lines have this format - if not, they are
# ignored, or the hostname may be invalid
#
select(STDOUT);
$| = 1;
LINE:
while (<STDIN>)
{
#
# feedback on lines processed
#
$num_lines++;
if (!($quiet)) {
$num_lines % 1000 == 0 && print STDOUT ".";
}
if (/: /)
{
@fields = split(': ', $_);
$hn = shift(@fields);
$ln = join(': ', @fields);
if (!defined($cur_hn))
{
$cur_hn = $hn;
push(@hs, $hn);
$long_ln = $ln;
next LINE;
}
if ($hn eq $cur_hn)
{
$long_ln = $long_ln . $ln;
next LINE;
}
else
{
if ($compress)
{
if ($long_ln eq $prev_ln)
{
$hdr{$prev_index} = $hdr{$prev_index} . ":" . $cur_hn;
}
else
{
$prev_index = &insert_tree($cur_hn, $long_ln);
$prev_ln = $long_ln;
}
$long_ln = $ln;
$cur_hn = $hn;
push(@hs, $hn);
}
else
{
$ls{$cur_hn} = $long_ln;
$long_ln = $ln;
$cur_hn = $hn;
push(@hs, $hn);
}
}
}
}
#
# If compression specified:
# Print the lines for each set of hosts with identical output preceded
# by the hostnames in [ hostname - hostname ] format.
# The hostnames are not sorted.
#
#
# If compression not specified:
# Print the lines for each host preceded by an underlined host name
# The hostnames are sorted alphabetically
#
!($quiet) && $num_lines > 999 && print STDOUT "\n";
if ($compress)
{
if ($long_ln eq $prev_ln)
{
$hdr{$prev_index} = $hdr{$prev_index} . ":" . $cur_hn;
}
else
{
&insert_tree($cur_hn, $long_ln);
}
&print_tree;
}
else
{
$ls{$cur_hn} = $long_ln;
&print_list;
}
#-----------------------------------------------------------------------------
#
# d_syntax
#
# Display help info
#
#-----------------------------------------------------------------------------
sub d_syntax
{
# Duplicates POD - pod2usage ?
my @usage;
push @usage, "Usage: xdshbak [-c | -x [-b] | -h | -q]";
push @usage, " -b : bare output, don't prepend hostname per line. only with -x";
push @usage, " -c : compresses the output by listing unique output only once.";
push @usage, " -h : help";
push @usage, " -x : omit extra header output for each node. Can not be used with -c.";
push @usage, " -q : quiet mode.";
my $usage = join "\n", @usage;
xCAT::MsgUtils->message("I", $usage);
}
#-----------------------------------------------------------------------------
#
# print_list
#
# Print the host output, by sorted host, in the following format:
#
# HOST: hostname
# --------------
# line
# line
#
# Two global data structures are used. @hs is an array of all the
# hostnames found. %ls{} is an associative array of (concatenated)
# lines, indexed on hostnames.
#
#-----------------------------------------------------------------------------
sub print_list
{
local (@lines, $numhosts, $hn_string, $l_string);
foreach $hostname (sort { versioncmp($a, $b) } @hs)
{
if (!$::opt_x) { ($num_hosts >= 1) && print "\n"; }
$num_hosts++;
if ($::opt_x) {
if ($::opt_b) {
# Bare output
print $ls{$hostname};
} else {
# No header. hostname prepended on every line
map { print "$hostname: $_\n" } split(/\n/, $ls{$hostname});
}
}
else
{
#$hn_string = `$SPMSG DSH $MSGCAT INFO510 'HOST: %1\$s\n' $hostname`;
xCAT::MsgUtils->message("I", "HOST:$hostname");
printf '%.' . (6 + length($hostname)) . "s\n",
'---------------------------------------------------------------';
print "$ls{$hostname}";
}
}
}
#-----------------------------------------------------------------------------
#
# display_wc
#
# Display the hostnames returning output.
#
#-----------------------------------------------------------------------------
sub display_wc
{
local ($i);
$i = 0;
while ($i <= $#wc - 1)
{
print "$wc[$i], ";
$i++;
}
print "$wc[$#wc]\n";
}
#-----------------------------------------------------------------------------
#
# print_tree
#
# Print the host output, in the following format:
#
# HOSTS --------------------------------------
# hostname hostname hostname
# --------------------------------------------
# line
# line
#
#-----------------------------------------------------------------------------
sub print_tree
{
local ($num_hosts, $hn_string, $pager);
foreach my $index (@indices)
{
($num_hosts >= 1) && print "\n";
$num_hosts++;
@wc = split(/:/, $hdr{$index});
@wc = sort { versioncmp($a, $b) } @wc;
#system "$SPMSG DSH $MSGCAT INFO511 'HOSTS '";
xCAT::MsgUtils->message("I",
"HOSTS -------------------------------------------------------------------------"
);
&display_wc;
print
"-------------------------------------------------------------------------------\n";
print $str{$index};
}
}
#-----------------------------------------------------------------------------
#
# insert_tree
#
# This routine implements a binary search tree for keeping previously
# found strings, to keep the number of string comparisons from
# growing exponentially by host.
#
# This routine creates the following data structures:
#
# 1. An array of characters strings , @indices[0..n], that contains the indices
# into the binary search tree array for the strings. These array is
# in the order of the strings coming in.
# The indices are used as the key to the associative arrays, %str and %hdr.
#
# The character strings for indices are of the form "p" to designate
# the parent and "l" for left children and "r" for the right children.
# The indices are concatenated together to form a character string.
# Therefore the binary tree node "pl" designates the left subtree
# of the parent.The character string "plr" denotes the right subtree
# node of the left subtree of the parent. A node that is at a depth
# of 10 would be represented by a unique 10 character string.
#
# 2. An associative array of strings, %strs{characters},
# consisting of all the output to be displayed. Each element is
# all the distinct output from a host or set of hosts with lines
# concatenated together and separated with $sepchar.
# 3. An associative array of strings, %hdrs{characters}, consisting of the
# header strings to be output prior to each set of distinct output
# lines. These strings are of the form: hostname:hostname
#
#
#-----------------------------------------------------------------------------
sub insert_tree
{
local ($h, $l, $i) = @_;
local ($no_match);
$i = "p"; # start binary search at parent which is the root of the tree
while (1)
{
if (!defined($str{$i}))
{ # found no match, insert new
$str{$i} = $l;
$hdr{$i} = $h;
push(@indices, $i);
return $i;
}
$no_match = ($l cmp $str{$i});
if (!$no_match)
{ # found match, update host hdr
$hdr{$i} = $hdr{$i} . ":" . $h;
return $i;
}
elsif ($no_match == -1)
{ # keep looking
$i = $i . "l"; # concatenate "l" for the left subtree
}
else
{
$i = $i . "r"; # concatenate "r" for the right subtree
}
}
}
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