+# 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;
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 () {
+ system "mt -f $tape rewind"; $? and die $?;
+}
+
+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 writetapeid ($) {
+ open T, ">TAPEID" or die $!;
+ print T "$_[0]\n" or die $!;
+ close T or die $!;
+
+ system "tar -b$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: $!";
undef %processes;
}
-sub readfsys ($) {
- 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+)$,) {
+ # Line of form '/file/system dumptype'
$atf= $1;
$tm= $2;
$prefix= '<local>';
-d _ or die "not a dir: $atf";
$rstr= '';
} elsif ($tf =~ m,^(/\S*)\s+(\w+)\s+(\w+)$,) {
+ # Line of form '/file/system dumptype prefix'
+ # (used for remote backups, I think)
$atf= $1;
$tm= $2;
$prefix= $3;