summaryrefslogtreecommitdiff
path: root/lib/File/Find.pm
diff options
context:
space:
mode:
Diffstat (limited to 'lib/File/Find.pm')
-rw-r--r--lib/File/Find.pm170
1 files changed, 57 insertions, 113 deletions
diff --git a/lib/File/Find.pm b/lib/File/Find.pm
index 7abebc6544..67abf6088b 100644
--- a/lib/File/Find.pm
+++ b/lib/File/Find.pm
@@ -1,10 +1,7 @@
package File::Find;
require 5.000;
require Exporter;
-use Config;
require Cwd;
-require File::Basename;
-
=head1 NAME
@@ -24,6 +21,17 @@ finddepth - traverse a directory structure depth-first
=head1 DESCRIPTION
+The first argument to find() is either a hash reference describing the
+operations to be performed for each file, or a code reference. If it
+is a hash reference, then the value for the key C<wanted> should be a
+code reference. This code reference is called I<the wanted()
+function> below.
+
+Currently the only other supported key for the above hash is
+C<bydepth>, in presense of which the walk over directories is
+performed depth-first. Entry point finddepth() is a shortcut for
+specifying C<{ bydepth => 1}> in the first argument of find().
+
The wanted() function does whatever verifications you want.
$File::Find::dir contains the current directory name, and $_ the
current filename within that directory. $File::Find::name contains
@@ -34,7 +42,7 @@ prune the tree.
File::Find assumes that you don't alter the $_ variable. If you do then
make sure you return it to its original value before exiting your function.
-This library is primarily for the C<find2perl> tool, which when fed,
+This library is useful for the C<find2perl> tool, which when fed,
find2perl / -name .nfs\* -mtime +7 \
-exec rm -f {} \; -o -fstype nfs -prune
@@ -75,9 +83,10 @@ There is no way to make find or finddepth follow symlinks.
@EXPORT = qw(find finddepth);
-sub find {
+sub find_opt {
my $wanted = shift;
- my $cwd = Cwd::cwd();
+ my $bydepth = $wanted->{bydepth};
+ my $cwd = $bydepth ? Cwd::fastcwd() : Cwd::cwd();
# Localize these rather than lexicalizing them for backwards
# compatibility.
local($topdir,$topdev,$topino,$topmode,$topnlink);
@@ -87,27 +96,35 @@ sub find {
|| (warn("Can't stat $topdir: $!\n"), next);
if (-d _) {
if (chdir($topdir)) {
- ($dir,$_) = ($topdir,'.');
- $name = $topdir;
$prune = 0;
- &$wanted;
+ unless ($bydepth) {
+ ($dir,$_) = ($topdir,'.');
+ $name = $topdir;
+ $wanted->{wanted}->();
+ }
next if $prune;
my $fixtopdir = $topdir;
$fixtopdir =~ s,/$,, ;
$fixtopdir =~ s/\.dir$// if $Is_VMS;
- &finddir($wanted,$fixtopdir,$topnlink);
+ &finddir($wanted,$fixtopdir,$topnlink, $bydepth);
+ if ($bydepth) {
+ ($dir,$_) = ($fixtopdir,'.');
+ $name = $fixtopdir;
+ $wanted->{wanted}->();
+ }
}
else {
warn "Can't cd to $topdir: $!\n";
}
}
else {
+ require File::Basename;
unless (($_,$dir) = File::Basename::fileparse($topdir)) {
($dir,$_) = ('.', $topdir);
}
if (chdir($dir)) {
$name = $topdir;
- &$wanted;
+ $wanted->{wanted}->();
}
else {
warn "Can't cd to $dir: $!\n";
@@ -118,14 +135,14 @@ sub find {
}
sub finddir {
- my($wanted, $nlink);
+ my($wanted, $nlink, $bydepth);
local($dir, $name);
- ($wanted, $dir, $nlink) = @_;
+ ($wanted, $dir, $nlink, $bydepth) = @_;
my($dev, $ino, $mode, $subcount);
# Get the list of files in the current directory.
- opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return);
+ opendir(DIR,'.') || (warn("Can't open $dir: $!\n"), $bydepth || return);
my(@filenames) = readdir(DIR);
closedir(DIR);
@@ -135,7 +152,7 @@ sub finddir {
next if $_ eq '..';
$name = "$dir/$_";
$nlink = 0;
- &$wanted;
+ $wanted->{wanted}->();
}
}
else { # This dir has subdirectories.
@@ -143,9 +160,10 @@ sub finddir {
for (@filenames) {
next if $_ eq '.';
next if $_ eq '..';
- $nlink = $prune = 0;
+ $nlink = 0;
+ $prune = 0 unless $bydepth;
$name = "$dir/$_";
- &$wanted;
+ $wanted->{wanted}->() unless $bydepth;
if ($subcount > 0 || $dont_use_nlink) { # Seen all the subdirs?
# Get link count and check for directoriness.
@@ -161,7 +179,7 @@ sub finddir {
next if $prune;
if (chdir $_) {
$name =~ s/\.dir$// if $Is_VMS;
- &finddir($wanted,$name,$nlink);
+ &finddir($wanted,$name,$nlink, $bydepth);
chdir '..';
}
else {
@@ -169,109 +187,26 @@ sub finddir {
}
}
}
+ $wanted->{wanted}->() if $bydepth;
}
}
}
-
-sub finddepth {
- my $wanted = shift;
- my $cwd = Cwd::cwd();
- # Localize these rather than lexicalizing them for backwards
- # compatibility.
- local($topdir,$topdev,$topino,$topmode,$topnlink);
- foreach $topdir (@_) {
- (($topdev,$topino,$topmode,$topnlink) =
- ($Is_VMS ? stat($topdir) : lstat($topdir)))
- || (warn("Can't stat $topdir: $!\n"), next);
- if (-d _) {
- if (chdir($topdir)) {
- my $fixtopdir = $topdir;
- $fixtopdir =~ s,/$,, ;
- $fixtopdir =~ s/\.dir$// if $Is_VMS;
- &finddepthdir($wanted,$fixtopdir,$topnlink);
- ($dir,$_) = ($topdir,'.');
- $name = $topdir;
- &$wanted;
- }
- else {
- warn "Can't cd to $topdir: $!\n";
- }
- }
- else {
- unless (($_,$dir) = File::Basename::fileparse($topdir)) {
- ($dir,$_) = ('.', $topdir);
- }
- if (chdir($dir)) {
- $name = $topdir;
- &$wanted;
- }
- else {
- warn "Can't cd to $dir: $!\n";
- }
- }
- chdir $cwd;
- }
+sub wrap_wanted {
+ my $wanted = shift;
+ defined &$wanted ? {wanted => $wanted} : $wanted;
}
-sub finddepthdir {
- my($wanted, $nlink);
- local($dir, $name);
- ($wanted, $dir, $nlink) = @_;
- my($dev, $ino, $mode, $subcount);
-
- # Get the list of files in the current directory.
- opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return);
- my(@filenames) = readdir(DIR);
- closedir(DIR);
-
- if ($nlink == 2 && !$dont_use_nlink) { # 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 = 0;
- $name = "$dir/$_";
- if ($subcount > 0 || $dont_use_nlink) { # Seen all the subdirs?
-
- # Get link count and check for directoriness.
-
- ($dev,$ino,$mode,$nlink) = ($Is_VMS ? stat($_) : lstat($_));
-
- if (-d _) {
-
- # It really is a directory, so do it recursively.
-
- --$subcount;
- if (chdir $_) {
- $name =~ s/\.dir$// if $Is_VMS;
- &finddepthdir($wanted,$name,$nlink);
- chdir '..';
- }
- else {
- warn "Can't cd to $_: $!\n";
- }
- }
- }
- &$wanted;
- }
- }
+sub find {
+ my $wanted = shift;
+ find_opt(wrap_wanted($wanted), @_);
}
-# Set dont_use_nlink in your hint file if your system's stat doesn't
-# report the number of links in a directory as an indication
-# of the number of files.
-# See, e.g. hints/machten.sh for MachTen 2.2.
-$dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'});
+sub find_depth {
+ my $wanted = wrap_wanted(shift);
+ $wanted->{bydepth} = 1;
+ find_opt($wanted, @_);
+}
# These are hard-coded for now, but may move to hint files.
if ($^O eq 'VMS') {
@@ -282,5 +217,14 @@ if ($^O eq 'VMS') {
$dont_use_nlink = 1
if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32';
+# Set dont_use_nlink in your hint file if your system's stat doesn't
+# report the number of links in a directory as an indication
+# of the number of files.
+# See, e.g. hints/machten.sh for MachTen 2.2.
+unless ($dont_use_nlink) {
+ require Config;
+ $dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'});
+}
+
1;
View Lorry Controller Status