diff -r 75bddaf5ed89 -r bdf6e224ffe6 amdumpext --- a/amdumpext Wed Dec 11 22:37:00 2013 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,351 +0,0 @@ -#! /usr/bin/perl -use 5.010; -use strict; -use warnings; -use Pod::Usage; -use Getopt::Long; -use Readonly; - -our $VERSION = '0.01'; - -use constant YES => 'YES'; -use constant NO => 'NO'; -use constant DUMPDATES => '/var/lib/dumpdates'; -use constant FD3 => 3; -use constant FD4 => 4; - -Readonly my %SUPPORT => ( - CONFIG => YES, # --config … (ignored?) - HOST => YES, # --host … (ignored?) - DISK => YES, # --disk … (ignored?) - MAX_LEVEL => 9, - CLIENT_ESTIMATE => YES, # estimate - CALCSIZE => YES, # estimate --calcsize - MESSAGE_LINE => YES, # --message line - INDEX_LINE => NO, # --index line - RECORD => YES, # --record -); - -# the commands we need to support as required by the -# API: http://wiki.zmanda.com/index.php/Application_API/Operations - -sub exec_support; -sub exec_selfcheck; -sub exec_estimate; -sub exec_backup; - -# some helper functions - -sub device; -sub OK; -sub ERROR; - -# bad but common style - the global options - -my $opt_config; # $config -my $opt_host; # $host -my $opt_disk; # $disk DLE[1] -my $opt_device; # $device DLE[2] -my $opt_message; # line / <> -my $opt_index; # line / <> -my $opt_record; # true / <> -my $opt_level; # 0…99 -my $opt_calcsize; # true / <> - -my $opt_dumpdates; - -MAIN: { - say "$0 @ARGV" if -t STDOUT; - - my @argv = @ARGV; - my $command = shift // pod2usage; - GetOptions( - - 'config=s' => \$opt_config, - 'host=s' => \$opt_host, # --host $host - 'disk=s' => \$opt_disk, # --disk $disk - 'device=s' => \$opt_device, # --device $device - - 'message=s' => \$opt_message, # --message line - 'index=s' => \$opt_index, # --index line - 'record!' => \$opt_record, # --record - 'level=i' => \$opt_level, # --level n - 'calcsize!' => \$opt_calcsize, - - 'dumpdates=s' => \$opt_dumpdates, # --dumpdates - ) or pod2usage(-message => "$0 @argv"); - - given ($command) { - when ("support") { exec_support } - when ("selfcheck") { exec_selfcheck } - when ("estimate") { exec_estimate } - when ("backup") { exec_backup } - } - pod2usage(-message => "$0 @argv"); -} - -# output a list of supported options -sub exec_support { - print map { "$_ $SUPPORT{$_}\n" =~ s/_/-/gr } keys %SUPPORT; - exit 0; -} - -sub exec_selfcheck { - - if ($_ = (grep { -x ($_ .= "/dump") } split /:/ => $ENV{PATH})[0]) { - OK "dump is \"$_\""; - } - else { say "ERROR dump not found in $ENV{PATH}\n" } - - # check the device - # the opt_disk is just a label, the device is in opt_device! - my $device = device($opt_device); - - if (-b $device) { OK "$opt_device ($device is block special)" } - elsif (-d $device) { OK "$opt_device ($device is directory)" } - else { ERROR "$opt_device not recognized" } - - # check the dumpdates file - if ($opt_record) { - my $dumpdates = $opt_dumpdates ? expand($opt_dumpdates) : DUMPDATES; - - eval { open(my $x, "+>>", $dumpdates) or die "$!\n" }; - if (chomp $@) { ERROR "dumpdates file \"$dumpdates\": $@" } - else { OK "dumpdates file: \"$dumpdates\"" } - } - - exit 0; -} - -sub exec_estimate { - - # $opt_level, $opt_device - my @cmd = ( - dump => "-$opt_level", - "-S", - $opt_record && $opt_dumpdates ? (-D => expand($opt_dumpdates)) : (), - device($opt_device), - ); - - chomp(my $output = `@cmd 2>&1`); - - if ($? or $output !~ /^\d+/) { - say "unexpected output \"$output\""; - exit 1; - } - - $output /= 1024; # to get 1K blocks - - # level blocks blocksize - # --> the blocksize unit is K - say "$opt_level $output 1"; - exit 0; -} - -sub exec_backup { - - # fd1: data channel - # fd3: message channel - # fd4: index channel - - my @dump = ( - dump => "-$opt_level", - -f => "-", - $opt_record ? "-u" : (), - $opt_record && $opt_dumpdates ? (-D => expand($opt_dumpdates)) : (), - device($opt_device) - ); - - # messages ----------, - # ,---------> fd2 ----> fd3 - # dump --o----> fd1 (data) - # `---> restore -t --> fd4 (index) - - open(my $msg, ">&=", FD3) or die "Can't open fd3: $!\n"; - open(my $idx, ">&=", FD4) or die "Can't open fd4: $!\n" if $opt_index; - - if ($opt_index) { - my $pid = fork // die "Can't fork: $!\n"; - if (not $pid) { - open(STDOUT, "|-") or do { - open(my $restore, "|-") or do { - open(STDOUT, "|-") or do { - select($idx); - postprocess_toc(); - exit 0; - }; - exec "restore", "-tvf" => "-"; - die "Can't exec `restore -tvf -`: $!"; - }; - local $/ = 2**16; - while () { - print $_; - print $restore $_; - }; - exit 0; - }; - - open(STDERR, "|-") or do { - select($msg); - postprocess_dump_messages(); - exit 0; - }; - - - exec @dump; - die "Can't exec `@dump`: $!\n"; - } - - waitpid($pid, 0); - exit $?; - } - - # no need to send an index - my $pid = fork // die "Can't fork: $!\n"; - if (not $pid) { - open(STDERR, "|-") or do { - select($msg); - postprocess_dump_messages(); - exit 0; - }; - exec @dump; - die "Can't exec `@dump`: $!\n"; - } - waitpid($pid, 0); - exit $?; - -} - -sub postprocess_dump_messages() { - while () { - print "| $_"; - - if (/^\s+DUMP: (\d+) blocks?/) { - - # we assume a block size of 1K - say "sendbackup: size $1"; - } - elsif (/^\s+DUMP: DUMP IS DONE/) { - say "sendbackup: end"; - } - } -} - -sub postprocess_toc { - # dir 4711 ./aaa - # leaf 4712 ./bbb/xxx - # leaf 4713 ./bbb/a - # b - # leaf 8819 ./bbb/x - - my $name; - - while () { - chomp; - if (/^(dir|leaf)\s+\d+\s+(\.\/.*)/) { - say $name if defined $name; - $name = $2 . ($1 eq "dir" ? "/" : ""); - next; - } - - if ($name) { - $name .= $_; - next; - } - - } - - say $name if defined $name; - -} - -sub device { - my $_ = shift; - return $_ if /^\//; - return "/dev/$_"; -} - -sub expand { - my $_ = shift; - s/\${c}/$opt_config/g; - return $_; -} - -sub OK { say "OK ", @_ } -sub ERROR { say "ERROR ", @_ } - -=head1 NAME - - amdumpext - the amanda dump application - -=head1 SYNOPSIS - - amdumpext support|selfcheck [options] - -=head1 COMMANDS - -=over - -=item B - -Send a list of supported features. - -=back - -=head1 OPTIONS - -=head2 Common Options - -The following options have to be supported by the application. - -=over 4 - -=item B<--config> I - -The configuration to be used (the backup set). - -=item B<--host> I - -The host from the DLE. - -=item B<--disk> I - -The disk to be saved. It's some "label" for the device to be backed up. - -=item B<--device> I - -The device to be backed up (may be a device name, a mountpoint). - -=back - -=head2 Optional options - -The following options need to be supported if indicated by the "support" -command. - -=over - -=item B<--message> "line" - -Send messages line by line. - -=item B<--index> "line" - -Send the index line by line. - -=back - -=cut - -=head2 Properties - -=over 4 - -=item B<--dumpdates> I - -The location of the dumpdates file. Placeholder "${c}" is allowed and -replaced by the name of the current config. - -=back - -# vim:sts=4 sw=4 aw ai sm: