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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 | # } |
29 | |
30 | sub find { |
31 | chop($cwd = `pwd`); |
32 | foreach $topdir (@_) { |
33 | (($topdev,$topino,$topmode,$topnlink) = stat($topdir)) |
34 | || (warn("Can't stat $topdir: $!\n"), next); |
35 | if (-d _) { |
36 | if (chdir($topdir)) { |
37 | ($dir,$_) = ($topdir,'.'); |
38 | $name = $topdir; |
39 | &wanted; |
40 | $topdir =~ s,/$,, ; |
41 | &finddir($topdir,$topnlink); |
42 | } |
43 | else { |
44 | warn "Can't cd to $topdir: $!\n"; |
45 | } |
46 | } |
47 | else { |
48 | unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) { |
49 | ($dir,$_) = ('.', $topdir); |
50 | } |
8adcabd8 |
51 | $name = $topdir; |
6e21c824 |
52 | chdir $dir && &wanted; |
53 | } |
54 | chdir $cwd; |
55 | } |
56 | } |
57 | |
58 | sub finddir { |
59 | local($dir,$nlink) = @_; |
60 | local($dev,$ino,$mode,$subcount); |
61 | local($name); |
62 | |
63 | # Get the list of files in the current directory. |
64 | |
8adcabd8 |
65 | opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return); |
6e21c824 |
66 | local(@filenames) = readdir(DIR); |
67 | closedir(DIR); |
68 | |
69 | if ($nlink == 2) { # This dir has no subdirectories. |
70 | for (@filenames) { |
71 | next if $_ eq '.'; |
72 | next if $_ eq '..'; |
73 | $name = "$dir/$_"; |
74 | $nlink = 0; |
75 | &wanted; |
76 | } |
77 | } |
78 | else { # This dir has subdirectories. |
79 | $subcount = $nlink - 2; |
80 | for (@filenames) { |
81 | next if $_ eq '.'; |
82 | next if $_ eq '..'; |
83 | $nlink = $prune = 0; |
84 | $name = "$dir/$_"; |
85 | &wanted; |
86 | if ($subcount > 0) { # Seen all the subdirs? |
87 | |
88 | # Get link count and check for directoriness. |
89 | |
90 | ($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink; |
91 | |
92 | if (-d _) { |
93 | |
94 | # It really is a directory, so do it recursively. |
95 | |
96 | if (!$prune && chdir $_) { |
97 | &finddir($name,$nlink); |
98 | chdir '..'; |
99 | } |
100 | --$subcount; |
101 | } |
102 | } |
103 | } |
104 | } |
105 | } |
106 | 1; |