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Diffstat (limited to 'gnu/usr.bin/perl/lib/find.pl')
-rw-r--r-- | gnu/usr.bin/perl/lib/find.pl | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gnu/usr.bin/perl/lib/find.pl b/gnu/usr.bin/perl/lib/find.pl new file mode 100644 index 0000000..8dab054 --- /dev/null +++ b/gnu/usr.bin/perl/lib/find.pl @@ -0,0 +1,106 @@ +# Usage: +# require "find.pl"; +# +# &find('/foo','/bar'); +# +# sub wanted { ... } +# where wanted does whatever you want. $dir contains the +# current directory name, and $_ the current filename within +# that directory. $name contains "$dir/$_". You are cd'ed +# to $dir when the function is called. The function may +# set $prune to prune the tree. +# +# This library is primarily for find2perl, which, when fed +# +# find2perl / -name .nfs\* -mtime +7 -exec rm -f {} \; -o -fstype nfs -prune +# +# spits out something like this +# +# sub wanted { +# /^\.nfs.*$/ && +# (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) && +# int(-M _) > 7 && +# unlink($_) +# || +# ($nlink || (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_))) && +# $dev < 0 && +# ($prune = 1); +# } + +sub find { + chop($cwd = `pwd`); + foreach $topdir (@_) { + (($topdev,$topino,$topmode,$topnlink) = stat($topdir)) + || (warn("Can't stat $topdir: $!\n"), next); + if (-d _) { + if (chdir($topdir)) { + ($dir,$_) = ($topdir,'.'); + $name = $topdir; + &wanted; + $topdir =~ s,/$,, ; + &finddir($topdir,$topnlink); + } + else { + warn "Can't cd to $topdir: $!\n"; + } + } + else { + unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) { + ($dir,$_) = ('.', $topdir); + } + $name = $topdir; + chdir $dir && &wanted; + } + chdir $cwd; + } +} + +sub finddir { + local($dir,$nlink) = @_; + local($dev,$ino,$mode,$subcount); + local($name); + + # Get the list of files in the current directory. + + opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return); + local(@filenames) = readdir(DIR); + closedir(DIR); + + if ($nlink == 2) { # This dir has no subdirectories. + for (@filenames) { + next if $_ eq '.'; + next if $_ eq '..'; + $name = "$dir/$_"; + $nlink = 0; + &wanted; + } + } + else { # This dir has subdirectories. + $subcount = $nlink - 2; + for (@filenames) { + next if $_ eq '.'; + next if $_ eq '..'; + $nlink = $prune = 0; + $name = "$dir/$_"; + &wanted; + if ($subcount > 0) { # Seen all the subdirs? + + # Get link count and check for directoriness. + + ($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink; + + if (-d _) { + + # It really is a directory, so do it recursively. + + if (!$prune && chdir $_) { + &finddir($name,$nlink); + chdir '..'; + } + --$subcount; + } + } + } + } +} +1; |