107 lines
2.3 KiB
Perl
107 lines
2.3 KiB
Perl
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# Usage:
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# require "find.pl";
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#
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# &find('/foo','/bar');
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#
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# sub wanted { ... }
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# where wanted does whatever you want. $dir contains the
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# current directory name, and $_ the current filename within
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# that directory. $name contains "$dir/$_". You are cd'ed
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# to $dir when the function is called. The function may
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# set $prune to prune the tree.
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#
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# This library is primarily for find2perl, which, when fed
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#
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# find2perl / -name .nfs\* -mtime +7 -exec rm -f {} \; -o -fstype nfs -prune
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#
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# spits out something like this
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#
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# sub wanted {
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# /^\.nfs.*$/ &&
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# (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
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# int(-M _) > 7 &&
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# unlink($_)
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# ||
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# ($nlink || (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_))) &&
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# $dev < 0 &&
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# ($prune = 1);
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# }
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sub find {
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chop($cwd = `pwd`);
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foreach $topdir (@_) {
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(($topdev,$topino,$topmode,$topnlink) = stat($topdir))
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|| (warn("Can't stat $topdir: $!\n"), next);
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if (-d _) {
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if (chdir($topdir)) {
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($dir,$_) = ($topdir,'.');
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$name = $topdir;
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&wanted;
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$topdir =~ s,/$,, ;
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&finddir($topdir,$topnlink);
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}
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else {
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warn "Can't cd to $topdir: $!\n";
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}
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}
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else {
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unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) {
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($dir,$_) = ('.', $topdir);
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}
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$name = $topdir;
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chdir $dir && &wanted;
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}
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chdir $cwd;
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}
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}
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sub finddir {
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local($dir,$nlink) = @_;
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local($dev,$ino,$mode,$subcount);
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local($name);
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# Get the list of files in the current directory.
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opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return);
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local(@filenames) = readdir(DIR);
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closedir(DIR);
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if ($nlink == 2) { # This dir has no subdirectories.
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for (@filenames) {
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next if $_ eq '.';
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next if $_ eq '..';
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$name = "$dir/$_";
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$nlink = 0;
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&wanted;
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}
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}
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else { # This dir has subdirectories.
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$subcount = $nlink - 2;
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for (@filenames) {
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next if $_ eq '.';
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next if $_ eq '..';
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$nlink = $prune = 0;
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$name = "$dir/$_";
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&wanted;
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if ($subcount > 0) { # Seen all the subdirs?
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# Get link count and check for directoriness.
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($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink;
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if (-d _) {
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# It really is a directory, so do it recursively.
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if (!$prune && chdir $_) {
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&finddir($name,$nlink);
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chdir '..';
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}
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--$subcount;
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}
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}
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}
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}
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}
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1;
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