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4c599711 WD |
1 | #!/usr/bin/perl -w |
2 | # This script takes a command-line arg of a source directory | |
3 | # that will be passed to rsync, and generates a set of excludes | |
4 | # that will exclude all mount points from the list. This is | |
5 | # useful if you have "bind" mounts since the --one-file-system | |
6 | # option won't notice the transition to a different spot on | |
7 | # the same disk. For example: | |
8 | # | |
9 | # mnt-excl /dir | rsync --exclude-from=- ... /dir /dest/ | |
10 | # mnt-excl /dir/ | rsync --exclude-from=- ... /dir/ /dest/ | |
026deaf7 | 11 | # ssh host mnt-excl /dir | rsync --exclude-from=- ... host:/dir /dest/ |
4c599711 WD |
12 | # |
13 | # Imagine that /dir/foo is a mount point: the first invocation of | |
14 | # mnt-excl would have output /dir/foo, while the second would have | |
15 | # output /foo (which are the properly anchored excludes). | |
16 | # | |
17 | # NOTE: This script expects /proc/mounts to exist, but could be | |
18 | # easily adapted to read /etc/mtab or similar. | |
19 | ||
20 | use strict; | |
21 | use Cwd 'abs_path'; | |
22 | ||
3d54c6ec | 23 | my $file = '/proc/mounts'; |
4c599711 WD |
24 | my $dir = shift || '/'; |
25 | $dir = abs_path($dir); | |
26 | $dir =~ s#([^/]*)$##; | |
27 | my $trailing = $1; | |
28 | $trailing = '' if $trailing eq '.' || !-d "$dir$trailing"; | |
29 | $trailing .= '/' if $trailing ne ''; | |
30 | ||
3d54c6ec | 31 | open(IN, $file) or die "Unable to open $file: $!\n"; |
4c599711 WD |
32 | while (<IN>) { |
33 | $_ = (split)[1]; | |
34 | next unless s#^\Q$dir$trailing\E##o && $_ ne ''; | |
35 | print "- /$trailing$_\n"; | |
36 | } | |
37 | close IN; |