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1 | # Usage: |
2 | # require "find.pl"; |
3 | # |
4 | # &find('/foo','/bar'); |
5 | # |
6 | # sub wanted { ... } |
7 | # where wanted does whatever you want. $dir contains the |
8 | # current directory name, and $_ the current filename within |
9 | # that directory. $name contains "$dir/$_". You are cd'ed |
10 | # to $dir when the function is called. The function may |
11 | # set $prune to prune the tree. |
12 | # |
13 | # This library is primarily for find2perl, which, when fed |
14 | # |
15 | # find2perl / -name .nfs\* -mtime +7 -exec rm -f {} \; -o -fstype nfs -prune |
16 | # |
17 | # spits out something like this |
18 | # |
19 | # sub wanted { |
20 | # /^\.nfs.*$/ && |
21 | # (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) && |
22 | # int(-M _) > 7 && |
23 | # unlink($_) |
24 | # || |
25 | # ($nlink || (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_))) && |
26 | # $dev < 0 && |
27 | # ($prune = 1); |
28 | # } |
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29 | # |
30 | # Set the variable $dont_use_nlink if you're using AFS, since AFS cheats. |
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31 | |
32 | sub find { |
33 | chop($cwd = `pwd`); |
34 | foreach $topdir (@_) { |
35 | (($topdev,$topino,$topmode,$topnlink) = stat($topdir)) |
36 | || (warn("Can't stat $topdir: $!\n"), next); |
37 | if (-d _) { |
38 | if (chdir($topdir)) { |
39 | ($dir,$_) = ($topdir,'.'); |
40 | $name = $topdir; |
41 | &wanted; |
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42 | ($fixtopdir = $topdir) =~ s,/$,, ; |
43 | &finddir($fixtopdir,$topnlink); |
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44 | } |
45 | else { |
46 | warn "Can't cd to $topdir: $!\n"; |
47 | } |
48 | } |
49 | else { |
50 | unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) { |
51 | ($dir,$_) = ('.', $topdir); |
52 | } |
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53 | $name = $topdir; |
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54 | chdir $dir && &wanted; |
55 | } |
56 | chdir $cwd; |
57 | } |
58 | } |
59 | |
60 | sub finddir { |
61 | local($dir,$nlink) = @_; |
62 | local($dev,$ino,$mode,$subcount); |
63 | local($name); |
64 | |
65 | # Get the list of files in the current directory. |
66 | |
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67 | opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return); |
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68 | local(@filenames) = readdir(DIR); |
69 | closedir(DIR); |
70 | |
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71 | if ($nlink == 2 && !$dont_use_nlink) { # This dir has no subdirectories. |
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72 | for (@filenames) { |
73 | next if $_ eq '.'; |
74 | next if $_ eq '..'; |
75 | $name = "$dir/$_"; |
76 | $nlink = 0; |
77 | &wanted; |
78 | } |
79 | } |
80 | else { # This dir has subdirectories. |
81 | $subcount = $nlink - 2; |
82 | for (@filenames) { |
83 | next if $_ eq '.'; |
84 | next if $_ eq '..'; |
85 | $nlink = $prune = 0; |
86 | $name = "$dir/$_"; |
87 | &wanted; |
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88 | if ($subcount > 0 || $dont_use_nlink) { # Seen all the subdirs? |
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89 | |
90 | # Get link count and check for directoriness. |
91 | |
92 | ($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink; |
93 | |
94 | if (-d _) { |
95 | |
96 | # It really is a directory, so do it recursively. |
97 | |
98 | if (!$prune && chdir $_) { |
99 | &finddir($name,$nlink); |
100 | chdir '..'; |
101 | } |
102 | --$subcount; |
103 | } |
104 | } |
105 | } |
106 | } |
107 | } |
108 | 1; |