+# backuplib.pl
+# core common routines
#
+# This file is part of chiark backup, a system for backing up GNU/Linux and
+# other UN*X-compatible machines, as used on chiark.greenend.org.uk.
+#
+# chiark backup is:
+# Copyright (C) 1997-1998,2000-2001 Ian Jackson <ian@chiark.greenend.org.uk>
+# Copyright (C) 1999 Peter Maydell <pmaydell@chiark.greenend.org.uk>
+#
+# This 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; either version 2, or (at your option) any later version.
+#
+# This is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# 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.
+
+require IO::File;
+
+$nice='nice ' if !defined $nice;
sub printdate () {
print scalar(localtime),"\n";
}
+# Set status info -- we write the current status to a file
+# so if we hang or crash the last thing written to the file
+# will tell us where we were when things went pear-shaped.
sub setstatus ($) {
open S, ">this-status.new" or die $!;
print S $_[0],"\n" or die $!;
rename "this-status.new","this-status" or die $!;
}
+# startprocess, endprocesses, killprocesses are
+# used to implement the funky pipeline stuff.
sub startprocess ($$$) {
my ($i,$o,$c) = @_;
print LOG " $c\n" or die $!;
exec $c; die "$c: $!";
}
+sub rewind_raw () {
+ runsystem("mt -f $tape rewind");
+}
+
+sub readtapeid_raw () {
+ open T, ">>TAPEID" or die $!; close T;
+ unlink 'TAPEID' or die $!;
+ rewind_raw();
+ system "mt -f $tape setblk $blocksizebytes"; $? and die $?;
+ system "dd if=$tape bs=${blocksize}b count=10 ".
+ "| tar -b$blocksize -vvxf - TAPEID";
+}
+
+sub runsystem ($) {
+ pboth(" $_[0]\n");
+ system $_[0];
+ $? and die $?;
+}
+
+sub pboth ($) {
+ my ($str) = @_;
+ print LOG $str or die $!;
+ print $str or die $!;
+}
+
+sub nexttapefile ($) {
+ my ($what) = @_;
+ $currenttapefilenumber++;
+ $currenttapefilename= $what;
+ pboth(sprintf "writing tape file #%d (mt fsf %d): %s\n",
+ $currenttapefilenumber, $currenttapefilenumber-1, $what);
+}
+
+sub writetapeid ($$) {
+ open T, ">TAPEID" or die $!;
+ print T "$_[0]\n$_[1]\n" or die $!;
+ close T or die $!;
+
+ $currenttapefilenumber= 0;
+ nexttapefile('TAPEID');
+
+ system "tar -b$blocksize -vvcf TAPEID.tar TAPEID"; $? and die $?;
+ system "dd if=TAPEID.tar of=$ntape bs=${blocksize}b count=10";
+ $? and die $?;
+}
+
sub endprocesses () {
while (keys %processes) {
$p= waitpid(-1,0) or die "wait: $!";
delete $processes{$p};
$? && die "error: command gave code $?: $c\n";
}
- print LOG " ok\n" or die $!;
- print " ok\n" or die $!;
+ pboth(" ok\n");
}
sub killprocesses {
undef %processes;
}
-sub readfsys ($) {
- my ($fsnm) = @_;
- open F, "$etc/fsys.$fsnm" or die "Filesystems $fsnm unknown ($!).\n";
+# Read a fsys.foo filesystem group definition file.
+# Syntax is: empty lines and those beginning with '#' are ignored.
+# Trailing whitespace is ignored. Lines of the form 'prefix foo bar'
+# are handled specially, as arex lines 'exclude regexp'; otherwise
+# we just shove the line into @fsys and let parsefsys deal with it.
+
+sub readfsysfile ($) {
+ my ($fn) = @_;
+ my ($fh,$sfn);
+ $fh= new IO::File "$fn", "r" or die "cannot open fsys file $fn ($!).\n";
for (;;) {
- $_= <F> or die; chomp; s/\s*$//;
+ $!=0; $_= <$fh> or die "unexpected EOF in $fn ($!)\n";
+ chomp; s/\s*$//;
last if m/^end$/;
next unless m/\S/;
next if m/^\#/;
if (m/^prefix\s+(\w+)\s+(\S.*\S)$/) {
$prefix{$1}= $2;
- next;
} elsif (m/^prefix\-df\s+(\w+)\s+(\S.*\S)$/) {
$prefixdf{$1}= $2;
- next;
+ } elsif (m/^excludedir\s+(\S.*\S)$/) {
+ push @excldir,$1;
+ } elsif (m/^exclude\s+(\S.*\S)$/) {
+ push @excl,$1;
+ } elsif (m/^include\s+(\S.*\S)$/) {
+ $sfn = $1;
+ $sfn =~ s/^\./fsys./;
+ $sfn = "$etc/$sfn" unless $sfn =~ m,^/,;
+ readfsysfile($sfn);
+ } else {
+ push @fsys,$_;
}
- push @fsys,$_;
}
- close F or die $!;
+ close $fh or die $!;
}
+sub readfsys ($) {
+ my ($fsnm) = @_;
+ my ($fsf);
+ $fsf= "$etc/fsys.$fsnm";
+ stat $fsf or die "Filesystems $fsnm unknown ($!).\n";
+ readfsysfile($fsf);
+}
+
+# Parse a line from a filesystem definition file. We expect the line
+# to be in $tf.
sub parsefsys () {
- if ($tf =~ m,^(/\S*)\s+(\w+)$,) {
+ my ($dopts,$dopt);
+ if ($tf =~ m#^(/\S*)\s+(\w+)([,=0-9a-z]*)$#) {
+ # Line of form '[/device:]/file/system dumptype[,options]'
$atf= $1;
$tm= $2;
+ $dopts= $3;
$prefix= '<local>';
+ $pcstr= '';
stat $atf or die "stat $atf: $!";
-d _ or die "not a dir: $atf";
$rstr= '';
- } elsif ($tf =~ m,^(/\S*)\s+(\w+)\s+(\w+)$,) {
+ } elsif ($tf =~ m#^(/\S*)\s+(\w+)([,=0-9a-z]*)\s+(\w+)$#) {
+ # Line of form '[/device:]/file/system dumptype[,options] prefix'
+ # (used for remote backups)
$atf= $1;
$tm= $2;
- $prefix= $3;
+ $dopts= $3;
+ $prefix= $4;
+ $pcstr= "$prefix:";
defined($prefix{$prefix}) or die "prefix $prefix in $tf ?\n";
$rstr= $prefix{$prefix}.' ';
+ } else {
+ die "fsys $tf ?";
+ }
+
+ $dev = $atf =~ s,^(.*)\:,, ? $1 : '';
+
+ undef %dopt;
+ foreach $dopt (split /\,/,$dopts) {
+ if (grep { $dopt eq $_ } qw(gz)) {
+ $dopt{$dopt}= 'y';
+ } elsif ($dopt =~ m/\=/ && grep { $` eq $_ } qw(gz)) {
+ $dopt{$`}= $';
+ } elsif (length $dopt) {
+ die "unknown option $dopt (in $dopts $tf)";
+ }
+ }
+
+ my ($gzo);
+ foreach $gzo (qw(gz gzi)) {
+ if ($dopt{$gzo} eq 'y') {
+ $$gzo= '1';
+ } elsif ($dopt{$gzo} =~ m/^\d$/) {
+ $$gzo= $dopt{$gzo};
+ } elsif (defined $dopt{$gzo}) {
+ die "$tf bad $gzo";
+ } else {
+ $$gzo= '';
+ }
}
}
~ian / chiark-utils.git / blobdiff