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01e293f1 | 1 | #!/usr/bin/perl |
4c599711 WD |
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. | |
62586267 WD |
19 | # |
20 | # ADDENDUM: The addition of the --filter option (which has support for | |
21 | # absolute-anchored excludes) has made this script less useful than it | |
22 | # was. Beginning with 2.6.4, you can achieve the effect of this script | |
e50e82ab | 23 | # through this command: |
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24 | # |
25 | # awk '{print $2}' /proc/mounts | rsync -f 'merge,/- -' host:/dir /dest/ | |
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26 | |
27 | use strict; | |
01e293f1 | 28 | use warnings; |
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29 | use Cwd 'abs_path'; |
30 | ||
3d54c6ec | 31 | my $file = '/proc/mounts'; |
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32 | my $dir = shift || '/'; |
33 | $dir = abs_path($dir); | |
34 | $dir =~ s#([^/]*)$##; | |
35 | my $trailing = $1; | |
36 | $trailing = '' if $trailing eq '.' || !-d "$dir$trailing"; | |
37 | $trailing .= '/' if $trailing ne ''; | |
38 | ||
3d54c6ec | 39 | open(IN, $file) or die "Unable to open $file: $!\n"; |
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40 | while (<IN>) { |
41 | $_ = (split)[1]; | |
42 | next unless s#^\Q$dir$trailing\E##o && $_ ne ''; | |
43 | print "- /$trailing$_\n"; | |
44 | } | |
45 | close IN; |