b8b4e74f04
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@306 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
795 lines
21 KiB
Perl
795 lines
21 KiB
Perl
#!/usr/bin/env perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT::DSHCore;
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use locale;
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use Socket;
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use xCAT::MsgUtils;
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use xCAT::Utils;
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#---------------------------------------------------------------------------
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=head3
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fork_no_output
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Forks a process for the given command array and returns the process
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ID for the forked process. Since no I/O is needed for the pipes, no
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STDOUT/STDERR pipes are returned to the caller.
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Arguments:
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$fork_id - unique identifer to use for tracking the forked process
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@command - command and parameter array to execute in the forkec process
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Returns:
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$pid - process identifer for the forked process
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Globals:
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None
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Error:
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None
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Example:
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$pid = xCAT::DSHCore->fork_no_output('hostname1PID', @command_array);
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Comments:
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=cut
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#---------------------------------------------------------------------------
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sub fork_no_output
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{
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my ($class, $fork_id, @command) = @_;
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my $pid;
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if ($pid = xCAT::Utils->xfork)
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{
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}
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elsif (defined $pid)
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{
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open(STDOUT, ">/dev/null");
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open(STDERR, ">/dev/null");
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select(STDOUT);
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$| = 1;
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select(STDERR);
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$| = 1;
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if (!(exec {$command[0]} @command))
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{
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return (-4, undef);
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}
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}
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else
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{
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return (-3, undef);
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}
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return ($pid, undef, undef, undef, undef);
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}
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#---------------------------------------------------------------------------
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=head3
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fork_output
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Forks a process for the given command array and returns the process
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ID for the forked process and references to all I/O pipes for STDOUT
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and STDERR.
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Arguments:
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$fork_id - unique identifer to use for tracking the forked process
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@command - command and parameter array to execute in the forkec process
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Returns:
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$pid - process identifer for the forked process
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Globals:
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None
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Error:
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None
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Example:
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$pid = xCAT::DSHCore->fork_no_output('hostname1PID', @command_array);
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Comments:
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=cut
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#---------------------------------------------------------------------------
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sub fork_output
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{
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my ($class, $fork_id, @command) = @_;
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my $pid;
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my %pipes = ();
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my $rout_fh = "rout_$fork_id";
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my $rerr_fh = "rerr_$fork_id";
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my $wout_fh = "wout_$fork_id";
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my $werr_fh = "werr_$fork_id";
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(pipe($rout_fh, $wout_fh) == -1) && return (-1, undef);
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(pipe($rerr_fh, $werr_fh) == -1) && return (-2, undef);
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if ($pid = fork)
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{
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close($wout_fh);
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close($werr_fh);
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}
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elsif (defined $pid)
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{
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close($rout_fh);
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close($rerr_fh);
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!(open(STDOUT, ">&$wout_fh")) && return (-5, undef);
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!(open(STDERR, ">&$werr_fh")) && return (-6, undef);
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select(STDOUT);
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$| = 1;
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select(STDERR);
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$| = 1;
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if (!(exec {$command[0]} @command))
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{
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return (-4, undef);
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}
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}
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else
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{
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return (-3, undef);
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}
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return ($pid, *$rout_fh, *$rerr_fh, *$wout_fh, *$werr_fh);
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}
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#---------------------------------------------------------------------------
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=head3
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ifconfig_inet
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Builds a list of all IP Addresses bound to the local host and
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stores them in a global list
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Arguments:
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None
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Returns:
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None
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Globals:
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@local_inet
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Error:
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None
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Example:
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xCAT::DSHCore->ifconfig_inet;
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Comments:
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Internal routine only
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=cut
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#---------------------------------------------------------------------------
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sub ifconfig_inet
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{
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@local_inet = ();
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if ($^O eq 'aix')
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{
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my @ip_address = ();
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my @output = `/usr/sbin/ifconfig -a`;
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foreach $line (@output)
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{
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($line =~ /inet ((\d{1,3}?\.){3}(\d){1,3})\s/o)
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&& (push @local_inet, $1);
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}
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}
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elsif ($^O eq 'linux')
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{
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my @ip_address = ();
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my @output = `/sbin/ifconfig -a`;
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foreach $line (@output)
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{
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($line =~ /inet addr:((\d{1,3}?\.){3}(\d){1,3})\s/o)
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&& (push @local_inet, $1);
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}
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}
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}
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#---------------------------------------------------------------------------
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=head3
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pipe_handler
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Handles and processes dsh output from a given read pipe handle. The output
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is immediately written to each output file handle as it is available.
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Arguments:
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$options - options hash table describing dsh configuration options
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$target_properties - property information of the target related to the pipe handle
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$read_fh - reference to the read pipe handle
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$buffer_size - local buffer size to read data from the handle
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$label - prefix label to use for dsh output
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$write_buffer - buffer of data that is yet to be written (must wait until \n is read)
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@write_fhs - array of output file handles where output will be written
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Returns:
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1 if the EOF reached on $read_fh
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undef otherwise
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Globals:
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None
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Error:
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None
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Example:
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Comments:
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=cut
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#---------------------------------------------------------------------------
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sub pipe_handler
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{
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my ($class, $options, $target_properties, $read_fh, $buffer_size, $label,
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$write_buffer, @write_fhs)
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= @_;
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my $line;
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my $target_hostname;
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my $eof_reached = undef;
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while (sysread($read_fh, $line, $buffer_size) != 0
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|| ($eof_reached = 1))
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{
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last if ($eof_reached);
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if ($line =~ /^\n$/)
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{
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# need to preserve blank lines in the output.
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$line = $label . $line;
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}
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my @lines = split "\n", $line;
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if (@$write_buffer)
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{
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my $buffered_line = shift @$write_buffer;
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my $next_line = shift @lines;
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$next_line = $buffered_line . $next_line;
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unshift @lines, $next_line;
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}
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if ($line !~ /\n$/)
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{
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push @$write_buffer, (pop @lines);
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}
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if (@lines)
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{
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$line = join "\n", @lines;
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$line .= "\n";
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if ($line =~ /:DSH_TARGET_RC=/)
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{
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my $start_offset = index($line, ':DSH_TARGET_RC');
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my $end_offset = index($line, ':', $start_offset + 1);
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my $target_rc_string =
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substr($line, $start_offset, $end_offset - $start_offset);
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my ($discard, $target_rc) = split '=', $target_rc_string;
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$line =~ s/:DSH_TARGET_RC=$target_rc:\n//g;
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$$target_properties{'target-rc'} = $target_rc;
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}
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if ($line ne '')
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{
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if ($line !~ /^$label\n$/)
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{
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$line = $label . $line;
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}
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$line =~ s/$/\n/ if $line !~ /\n$/;
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}
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$line =~ s/\n/\n$label/g;
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($line =~ /\n$label$/) && ($line =~ s/\n$label$/\n/);
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my @output_files = ();
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my @output_file_nos = ();
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foreach $write_fh (@write_fhs)
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{
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my $file_no = fileno($write_fh);
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if (grep /$file_no/, @output_file_nos)
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{
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$line =~ s/$label//g;
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}
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print $write_fh $line;
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}
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if (@output_files)
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{
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foreach $output_file (@output_files)
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{
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pop @write_fhs;
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close $output_file
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|| print STDOUT
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"dsh> Error_file_closed $$target_properties{hostname} $output_file\n";
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my %rsp;
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$rsp->{data}->[0] =
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"Error_file_closed $$target_properties{hostname $output_file}.\n";
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xCAT::MsgUtils->message("E", $rsp, $::CALLBACK);
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($output_file == $$target_properties{'output-fh'})
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&& delete $$target_properties{'output-fh'};
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($output_file == $$target_properties{'output-fh'})
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&& delete $$target_properties{'error-fh'};
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}
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}
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my $rin = '';
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vec($rin, fileno($read_fh), 1) = 1;
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my $fh_count = select($rin, undef, undef, 0);
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last if ($fh_count == 0);
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}
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}
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return $eof_reached;
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}
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#---------------------------------------------------------------------------
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=head3
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pipe_handler_buffer
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Handles and processes dsh output from a given read pipe handle. The output
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is stored in a buffer supplied by the caller.
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Arguments:
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$target_properties - property information of the target related to the pipe handle
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$read_fh - reference to the read pipe handle
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$buffer_size - local buffer size to read data from the handle
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$label - prefix label to use for dsh output
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$write_buffer - buffer of data that is yet to be written (must wait until \n is read)
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$output_buffer - buffer where output will be written
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Returns:
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1 if the EOF reached on $read_fh
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undef otherwise
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Globals:
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None
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Error:
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None
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Example:
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Comments:
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=cut
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#---------------------------------------------------------------------------
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sub pipe_handler_buffer
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{
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my ($class, $target_properties, $read_fh, $buffer_size, $label,
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$write_buffer, $output_buffer)
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= @_;
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my $line;
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my $eof_reached = undef;
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while ( (sysread($read_fh, $line, $buffer_size) != 0)
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|| ($eof_reached = 1))
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{
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last if ($eof_reached);
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if ($line =~ /^\n$/)
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{
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# need to preserve blank lines in the output.
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$line = $label . $line;
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}
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my @lines = split "\n", $line;
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if (@$write_buffer)
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{
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my $buffered_line = shift @$write_buffer;
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my $next_line = shift @lines;
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$next_line = $buffered_line . $next_line;
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unshift @lines, $next_line;
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}
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if ($line !~ /\n$/)
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{
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push @$write_buffer, (pop @lines);
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}
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if (@lines)
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{
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$line = join "\n", @lines;
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$line .= "\n";
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if ($line =~ /:DSH_TARGET_RC=/)
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{
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my $start_offset = index($line, ':DSH_TARGET_RC');
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my $end_offset = index($line, ':', $start_offset + 1);
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my $target_rc_string =
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substr($line, $start_offset, $end_offset - $start_offset);
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my ($discard, $target_rc) = split '=', $target_rc_string;
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$line =~ s/:DSH_TARGET_RC=$target_rc:\n//g;
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$$target_properties{'target-rc'} = $target_rc;
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}
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if ($line ne '')
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{
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if ($line !~ /^$label\n$/)
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{
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$line = $label . $line;
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}
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$line =~ s/$/\n/ if $line !~ /\n$/;
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}
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$line =~ s/\n/\n$label/g;
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($line =~ /\n$label$/) && ($line =~ s/\n$label$/\n/);
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push @$output_buffer, $line;
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my $rin = '';
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vec($rin, fileno($read_fh), 1) = 1;
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my $fh_count = select($rin, undef, undef, 0);
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last if ($fh_count == 0);
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}
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}
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return $eof_reached;
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}
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#---------------------------------------------------------------------------
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=head3
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fping_hostnames
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Executes fping on a given list of hostnames and returns a list of those
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hostnames that did not respond
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Arguments:
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@hostnames - list of hostnames to execute for fping
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Returns:
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@no_response - list of hostnames that did not respond
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undef if fping is not installed
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Globals:
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None
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Error:
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None
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Example:
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@bad_hosts = xCAT::DSHCore->fping_hostnames(@host_list);
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Comments:
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=cut
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#---------------------------------------------------------------------------
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sub fping_hostnames
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{
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my ($class, @hostnames) = @_;
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my $fping = (-x '/usr/sbin/fping') || undef;
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!$fping && return undef;
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my @output = `/usr/sbin/fping -B 1.0 -r 1 -t 50 -i 10 -p 50 @hostnames`;
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my @no_response = ();
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foreach $line (@output)
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{
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my ($hostname, $token, $status) = split ' ', $line;
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!(($token eq 'is') && ($status eq 'alive'))
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&& (push @no_response, $hostname);
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}
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return @no_response;
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}
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#---------------------------------------------------------------------------
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=head3
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ping_hostnames
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Executes ping on a given list of hostnames and returns a list of those
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hostnames that did not respond
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Arguments:
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@hostnames - list of hostnames to execute for fping
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Returns:
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@no_response - list of hostnames that did not respond
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undef if fping is not installed
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Globals:
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None
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Error:
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None
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Example:
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@bad_hosts = xCAT::DSHCore->ping_hostnames(@host_list);
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Comments:
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=cut
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#---------------------------------------------------------------------------
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sub ping_hostnames
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{
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my ($class, @hostnames) = @_;
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my $ping = (($^O eq 'aix') && '/usr/sbin/ping')
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|| (($^O eq 'linux') && '/bin/ping')
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|| undef;
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!$ping && return undef;
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my @no_response = ();
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foreach $hostname (@hostnames)
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{
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(system("$ping -c 1 -w 1 $hostname > /dev/null 2>&1") != 0)
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&& (push @no_response, $hostname);
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}
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return @no_response;
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}
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#---------------------------------------------------------------------------
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=head3
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resolve_hostnames
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Resolve all related information for a given target, including context
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IP address information and fully qualified hostname. If the target is
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unresolvable include in a list of unresolvable targets, otherwise store
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all resolved properties for the target.
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Arguments:
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$options - options hash table describing dsh configuration options
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$resolved_targets - hash table of resolved properties, keyed by target name
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$unresolved_targets - hash table of unresolved targets and relevant property information
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$context_targets - hash table of targets grouped by context name
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@target_list - input list of target names to resolve
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Returns:
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None
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Globals:
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None
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Error:
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None
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|
|
Example:
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Comments:
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=cut
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#---------------------------------------------------------------------------
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|
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sub resolve_hostnames
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{
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my ($class, $options, $resolved_targets, $unresolved_targets,
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$context_targets, @target_list)
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= @_;
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|
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scalar(@local_inet) || xCAT::DSHCore->ifconfig_inet;
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foreach $context_user_target (@target_list)
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{
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my ($context, $user_target) = split ':', $context_user_target;
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if (($context eq 'XCAT') && ($$options{'context'} eq 'DSH'))
|
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{
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|
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# The XCAT context may not be specified for this node since DSH is the only
|
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# available context.
|
|
my %rsp;
|
|
$rsp->{data}->[0] = "DSH is the only available context.\n";
|
|
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
|
|
next;
|
|
}
|
|
!$user_target
|
|
&& ( ($user_target = $context)
|
|
&& ($context = $$options{'context'}));
|
|
|
|
my ($user, $target) = split '@', $user_target;
|
|
!$target && (($target = $user) && ($user = undef));
|
|
|
|
$$options{'context-all'} && ($context = $$options{'context-all'});
|
|
|
|
if (my ($hostname, $aliases, $addrtype, $length, @addrs) =
|
|
gethostbyname($target))
|
|
{
|
|
my $ip_address = inet_ntoa($addrs[0]);
|
|
my $localhost = (grep { /^$ip_address$/ } @local_inet) || undef;
|
|
|
|
if ($hostname eq $ip_address)
|
|
{
|
|
my $packed_ip = inet_aton($ip_address);
|
|
my $hostbyaddr = gethostbyaddr($packed_ip, AF_INET);
|
|
$hostbyaddr && ($hostname = $hostbyaddr);
|
|
}
|
|
|
|
my %properties = (
|
|
'hostname' => $hostname,
|
|
'ip-address' => $ip_address,
|
|
'localhost' => $localhost,
|
|
'user' => $user,
|
|
'context' => $context,
|
|
'unresolved' => $target
|
|
);
|
|
|
|
$user && ($user .= '@');
|
|
$$resolved_targets{"$user$hostname"} = \%properties;
|
|
|
|
if ($context_targets)
|
|
{
|
|
if (!$$context_targets{$context})
|
|
{
|
|
my %context_target_list = ();
|
|
$$context_targets{$context} = \%context_target_list;
|
|
}
|
|
|
|
$$context_targets{$context}{"$user$hostname"}++;
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
my %properties = (
|
|
'hostname' => $target,
|
|
'user' => $user,
|
|
'context' => $context,
|
|
'unresolved' => $target
|
|
);
|
|
$$unresolved_targets{"$user_target"} = \%properties;
|
|
}
|
|
}
|
|
|
|
xCAT::DSHCore->removeExclude($resolved_targets, $unresolved_targets,
|
|
$context_targets);
|
|
}
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
=head3
|
|
pping_hostnames
|
|
|
|
Executes pping on a given list of hostnames and returns a list of those
|
|
hostnames that did not respond
|
|
|
|
Arguments:
|
|
@hostnames - list of hostnames to execute for fping
|
|
|
|
Returns:
|
|
@no_response - list of hostnames that did not respond
|
|
|
|
Globals:
|
|
None
|
|
|
|
Error:
|
|
None
|
|
|
|
Example:
|
|
@bad_hosts = xCAT::DSHCore->pping_hostnames(@host_list);
|
|
|
|
Comments:
|
|
|
|
=cut
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
sub pping_hostnames
|
|
{
|
|
my ($class, @hostnames) = @_;
|
|
|
|
my $hostname_list = join ",", @hostnames;
|
|
my @output =
|
|
xCAT::Utils->runcmd("pping -H $hostname_list", -1);
|
|
|
|
my @no_response = ();
|
|
foreach $line (@output)
|
|
{
|
|
my ($hostname, $result) = split ':', $line;
|
|
my ($token, $status) = split ' ', $result;
|
|
chomp($token);
|
|
!(($token eq 'ping') && ($status eq '(alive)'))
|
|
&& (push @no_response, $hostname);
|
|
}
|
|
|
|
return @no_response;
|
|
}
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
sub removeExclude
|
|
{
|
|
shift;
|
|
my ($resolved_targets, $unresolved_targets, $context_targets) = @_;
|
|
return if (!$resolved_targets || !$unresolved_targets);
|
|
|
|
my @invalid_resolved_targets;
|
|
my @invalid_unresolved_targets;
|
|
|
|
%::__EXCLUDED_TARGETS;
|
|
|
|
for my $unrsvl_tg (keys %$unresolved_targets)
|
|
{
|
|
if ($unresolved_targets->{$unrsvl_tg}->{'hostname'} =~ /^-/)
|
|
{
|
|
$::__EXCLUDED_TARGETS{$unrsvl_tg} =
|
|
$unresolved_targets->{$unrsvl_tg};
|
|
delete $unresolved_targets->{$unrsvl_tg};
|
|
}
|
|
}
|
|
|
|
for my $excluded_tg (keys %::__EXCLUDED_TARGETS)
|
|
{
|
|
for my $rslv_tg (keys %$resolved_targets)
|
|
{
|
|
if ( $::__EXCLUDED_TARGETS{$excluded_tg}->{'hostname'} eq '-'
|
|
. $resolved_targets->{$rslv_tg}->{'hostname'}
|
|
|| $::__EXCLUDED_TARGETS{$excluded_tg}->{'hostname'} eq '-'
|
|
. $resolved_targets->{$rslv_tg}->{'ip-address'}
|
|
|| $::__EXCLUDED_TARGETS{$excluded_tg}->{'hostname'} eq '-'
|
|
. $resolved_targets->{$rslv_tg}->{'unresolved'}
|
|
|| $::__EXCLUDED_TARGETS{$excluded_tg}->{'unresolved'} eq '-'
|
|
. $resolved_targets->{$rslv_tg}->{'hostname'}
|
|
|| $::__EXCLUDED_TARGETS{$excluded_tg}->{'unresolved'} eq '-'
|
|
. $resolved_targets->{$rslv_tg}->{'ip-address'}
|
|
|| $::__EXCLUDED_TARGETS{$excluded_tg}->{'unresolved'} eq '-'
|
|
. $resolved_targets->{$rslv_tg}->{'unresolved'})
|
|
{
|
|
push @invalid_resolved_targets, $rslv_tg;
|
|
}
|
|
}
|
|
}
|
|
|
|
for my $invalid_res (@invalid_resolved_targets)
|
|
{
|
|
my $context = $resolved_targets->{$invalid_res}->{'context'};
|
|
delete $context_targets->{$context}->{$invalid_res};
|
|
if (!scalar(keys %{$context_targets->{$context}}))
|
|
{
|
|
delete $context_targets->{$context};
|
|
}
|
|
delete $resolved_targets->{$invalid_res};
|
|
}
|
|
|
|
}
|
|
1;
|