Annotation of embedaddon/rsync/support/file-attr-restore, revision 1.1
1.1 ! misho 1: #!/usr/bin/perl
! 2: # This script will parse the output of "find ARG [ARG...] -ls" and
! 3: # apply (at your discretion) the permissions, owner, and group info
! 4: # it reads onto any existing files and dirs (it doesn't try to affect
! 5: # symlinks). Run this with --help (-h) for a usage summary.
! 6:
! 7: use strict;
! 8: use Getopt::Long;
! 9:
! 10: our($p_opt, $o_opt, $g_opt, $map_file, $dry_run, $verbosity, $help_opt);
! 11:
! 12: &Getopt::Long::Configure('bundling');
! 13: &usage if !&GetOptions(
! 14: 'all|a' => sub { $p_opt = $o_opt = $g_opt = 1 },
! 15: 'perms|p' => \$p_opt,
! 16: 'owner|o' => \$o_opt,
! 17: 'groups|g' => \$g_opt,
! 18: 'map|m=s' => \$map_file,
! 19: 'dry-run|n' => \$dry_run,
! 20: 'help|h' => \$help_opt,
! 21: 'verbose|v+' => \$verbosity,
! 22: ) || $help_opt;
! 23:
! 24: our(%uid_hash, %gid_hash);
! 25:
! 26: $" = ', '; # How to join arrays referenced in double-quotes.
! 27:
! 28: &parse_map_file($map_file) if defined $map_file;
! 29:
! 30: my $detail_line = qr{
! 31: ^ \s* \d+ \s+ # ignore inode
! 32: \d+ \s+ # ignore size
! 33: ([-bcdlps]) # 1. File type
! 34: ( [-r][-w][-xsS] # 2. user-permissions
! 35: [-r][-w][-xsS] # group-permissions
! 36: [-r][-w][-xtT] ) \s+ # other-permissions
! 37: \d+ \s+ # ignore number of links
! 38: (\S+) \s+ # 3. owner
! 39: (\S+) \s+ # 4. group
! 40: (?: \d+ \s+ )? # ignore size (when present)
! 41: \w+ \s+ \d+ \s+ # ignore month and date
! 42: \d+ (?: : \d+ )? \s+ # ignore time or year
! 43: ([^\r\n]+) $ # 5. name
! 44: }x;
! 45:
! 46: while (<>) {
! 47: my($type, $perms, $owner, $group, $name) = /$detail_line/;
! 48: die "Invalid input line $.:\n$_" unless defined $name;
! 49: die "A filename is not properly escaped:\n$_" unless $name =~ /^[^"\\]*(\\(\d\d\d|\D)[^"\\]*)*$/;
! 50: my $fn = $name;
! 51: $fn =~ s/\\(\d+|.)/ eval "\"\\$1\"" /eg;
! 52: if ($type eq '-') {
! 53: undef $type unless -f $fn;
! 54: } elsif ($type eq 'd') {
! 55: undef $type unless -d $fn;
! 56: } elsif ($type eq 'b') {
! 57: undef $type unless -b $fn;
! 58: } elsif ($type eq 'c') {
! 59: undef $type unless -c $fn;
! 60: } elsif ($type eq 'p') {
! 61: undef $type unless -p $fn;
! 62: } elsif ($type eq 's') {
! 63: undef $type unless -S $fn;
! 64: } else {
! 65: if ($verbosity) {
! 66: if ($type eq 'l') {
! 67: $name =~ s/ -> .*//;
! 68: $type = 'symlink';
! 69: } else {
! 70: $type = "type '$type'";
! 71: }
! 72: print "Skipping $name ($type ignored)\n";
! 73: }
! 74: next;
! 75: }
! 76: if (!defined $type) {
! 77: my $reason = -e _ ? "types don't match" : 'missing';
! 78: print "Skipping $name ($reason)\n";
! 79: next;
! 80: }
! 81: my($cur_mode, $cur_uid, $cur_gid) = (stat(_))[2,4,5];
! 82: $cur_mode &= 07777;
! 83: my $highs = join('', $perms =~ /..(.)..(.)..(.)/);
! 84: $highs =~ tr/-rwxSTst/00001111/;
! 85: $perms =~ tr/-STrwxst/00011111/;
! 86: my $mode = $p_opt ? oct('0b' . $highs . $perms) : $cur_mode;
! 87: my $uid = $o_opt ? $uid_hash{$owner} : $cur_uid;
! 88: if (!defined $uid) {
! 89: if ($owner =~ /^\d+$/) {
! 90: $uid = $owner;
! 91: } else {
! 92: $uid = getpwnam($owner);
! 93: }
! 94: $uid_hash{$owner} = $uid;
! 95: }
! 96: my $gid = $g_opt ? $gid_hash{$group} : $cur_gid;
! 97: if (!defined $gid) {
! 98: if ($group =~ /^\d+$/) {
! 99: $gid = $group;
! 100: } else {
! 101: $gid = getgrnam($group);
! 102: }
! 103: $gid_hash{$group} = $gid;
! 104: }
! 105:
! 106: my @changes;
! 107: if ($mode != $cur_mode) {
! 108: push(@changes, 'permissions');
! 109: if (!$dry_run && !chmod($mode, $fn)) {
! 110: warn "chmod($mode, \"$name\") failed: $!\n";
! 111: }
! 112: }
! 113: if ($uid != $cur_uid || $gid != $cur_gid) {
! 114: push(@changes, 'owner') if $uid != $cur_uid;
! 115: push(@changes, 'group') if $gid != $cur_gid;
! 116: if (!$dry_run) {
! 117: if (!chown($uid, $gid, $fn)) {
! 118: warn "chown($uid, $gid, \"$name\") failed: $!\n";
! 119: }
! 120: if (($mode & 06000) && !chmod($mode, $fn)) {
! 121: warn "post-chown chmod($mode, \"$name\") failed: $!\n";
! 122: }
! 123: }
! 124: }
! 125: if (@changes) {
! 126: print "$name: changed @changes\n";
! 127: } elsif ($verbosity) {
! 128: print "$name: OK\n";
! 129: }
! 130: }
! 131: exit;
! 132:
! 133: sub parse_map_file
! 134: {
! 135: my($fn) = @_;
! 136: open(IN, $fn) or die "Unable to open $fn: $!\n";
! 137: while (<IN>) {
! 138: if (/^user\s+(\S+)\s+(\S+)/) {
! 139: $uid_hash{$1} = $2;
! 140: } elsif (/^group\s+(\S+)\s+(\S+)/) {
! 141: $gid_hash{$1} = $2;
! 142: } else {
! 143: die "Invalid line #$. in mapfile `$fn':\n$_";
! 144: }
! 145: }
! 146: close IN;
! 147: }
! 148:
! 149: sub usage
! 150: {
! 151: die <<EOT;
! 152: Usage: file-attr-restore [OPTIONS] FILE [FILE...]
! 153: -a, --all Restore all the attributes (-pog)
! 154: -p, --perms Restore the permissions
! 155: -o, --owner Restore the ownership
! 156: -g, --groups Restore the group
! 157: -m, --map=FILE Read user/group mappings from FILE
! 158: -n, --dry-run Don't actually make the changes
! 159: -v, --verbose Increase verbosity
! 160: -h, --help Show this help text
! 161:
! 162: The FILE arg(s) should have been created by running the "find"
! 163: program with "-ls" as the output specifier.
! 164:
! 165: The input file for the --map option must be in this format:
! 166:
! 167: user FROM TO
! 168: group FROM TO
! 169:
! 170: The "FROM" should be an user/group mentioned in the input, and the TO
! 171: should be either a uid/gid number, or a local user/group name.
! 172: EOT
! 173: }
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