| Commit | Line | Data |
|---|
| 6e21c824 |
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 | # } |
| 8990e307 |
29 | # |
| 30 | # Set the variable $dont_use_nlink if you're using AFS, since AFS cheats. |
| 6e21c824 |
31 | |
| 32 | sub find { |
| 33 | chop($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 = $topdir; |
| 41 | &wanted; |
| a0d0e21e |
42 | ($fixtopdir = $topdir) =~ s,/$,, ; |
| 43 | &finddir($fixtopdir,$topnlink); |
| 6e21c824 |
44 | } |
| 45 | else { |
| 46 | warn "Can't cd to $topdir: $!\n"; |
| 47 | } |
| 48 | } |
| 49 | else { |
| 50 | unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) { |
| 51 | ($dir,$_) = ('.', $topdir); |
| 52 | } |
| 8adcabd8 |
53 | $name = $topdir; |
| 6e21c824 |
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 | |
| 8adcabd8 |
67 | opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return); |
| 6e21c824 |
68 | local(@filenames) = readdir(DIR); |
| 69 | closedir(DIR); |
| 70 | |
| 8990e307 |
71 | if ($nlink == 2 && !$dont_use_nlink) { # This dir has no subdirectories. |
| 6e21c824 |
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/$_"; |
| 87 | &wanted; |
| 8990e307 |
88 | if ($subcount > 0 || $dont_use_nlink) { # Seen all the subdirs? |
| 6e21c824 |
89 | |
| 90 | # Get link count and check for directoriness. |
| 91 | |
| 92 | ($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; |
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