X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FFile%2FFind.pm;h=1faea50158f36f1e1281615e81061cc85956e541;hb=acce7d4e04d89207299003c3e80c69d50bc82069;hp=612f14525a4ec25d28d64cb0aa7ab05916a1a7a6;hpb=a0d0e21ea6ea90a22318550944fe6cb09ae10cda;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/lib/File/Find.pm b/lib/File/Find.pm
index 612f145..1faea50 100644
--- a/lib/File/Find.pm
+++ b/lib/File/Find.pm
@@ -1,44 +1,82 @@
 package File::Find;
 require 5.000;
 require Exporter;
+use Config;
+require Cwd;
+require File::Basename;
+
+
+=head1 NAME
+
+find - traverse a file tree
+
+finddepth - traverse a directory structure depth-first
+
+=head1 SYNOPSIS
+
+    use File::Find;
+    find(\&wanted, '/foo','/bar');
+    sub wanted { ... }
+    
+    use File::Find;
+    finddepth(\&wanted, '/foo','/bar');
+    sub wanted { ... }
+
+=head1 DESCRIPTION
+
+The wanted() function does whatever verifications you want.
+$File::Find::dir contains the current directory name, and $_ the
+current filename within that directory.  $File::Find::name contains
+C<"$File::Find::dir/$_">.  You are chdir()'d to $File::Find::dir when
+the function is called.  The function may set $File::Find::prune to
+prune the tree.
+
+File::Find assumes that you don't alter the $_ variable.  If you do then
+make sure you return it to its original value before exiting your function.
+
+This library is primarily for the C<find2perl> tool, which when fed, 
+
+    find2perl / -name .nfs\* -mtime +7 \
+	-exec rm -f {} \; -o -fstype nfs -prune
+
+produces something like:
+
+    sub wanted {
+        /^\.nfs.*$/ &&
+        (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
+        int(-M _) > 7 &&
+        unlink($_)
+        ||
+        ($nlink || (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_))) &&
+        $dev < 0 &&
+        ($File::Find::prune = 1);
+    }
+
+Set the variable $File::Find::dont_use_nlink if you're using AFS,
+since AFS cheats.
+
+C<finddepth> is just like C<find>, except that it does a depth-first
+search.
+
+Here's another interesting wanted function.  It will find all symlinks
+that don't resolve:
+
+    sub wanted {
+	-l && !-e && print "bogus link: $File::Find::name\n";
+    } 
+
+=cut
 
 @ISA = qw(Exporter);
 @EXPORT = qw(find finddepth);
 
-# Usage:
-#	use File::Find;
-#
-#	find(\&wanted, '/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);
-#	}
-#
-# Set the variable $dont_use_nlink if you're using AFS, since AFS cheats.
 
 sub find {
     my $wanted = shift;
-    chop($cwd = `pwd`);
+    my $cwd = Cwd::cwd();
+    # Localize these rather than lexicalizing them for backwards
+    # compatibility.
+    local($topdir,$topdev,$topino,$topmode,$topnlink);
     foreach $topdir (@_) {
 	(($topdev,$topino,$topmode,$topnlink) = stat($topdir))
 	  || (warn("Can't stat $topdir: $!\n"), next);
@@ -47,7 +85,10 @@ sub find {
 		($dir,$_) = ($topdir,'.');
 		$name = $topdir;
 		&$wanted;
-		($fixtopdir = $topdir) =~ s,/$,, ;
+		my $fixtopdir = $topdir;
+	        $fixtopdir =~ s,/$,, ;
+		$fixtopdir =~ s/\.dir$// if $Is_VMS;
+		$fixtopdir =~ s/\\dir$// if $Is_NT;
 		&finddir($wanted,$fixtopdir,$topnlink);
 	    }
 	    else {
@@ -55,7 +96,7 @@ sub find {
 	    }
 	}
 	else {
-	    unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) {
+	    unless (($_,$dir) = File::Basename::fileparse($topdir)) {
 		($dir,$_) = ('.', $topdir);
 	    }
 	    $name = $topdir;
@@ -66,14 +107,15 @@ sub find {
 }
 
 sub finddir {
-    local($wanted,$dir,$nlink) = @_;
-    local($dev,$ino,$mode,$subcount);
-    local($name);
+    my($wanted, $nlink);
+    local($dir, $name);
+    ($wanted, $dir, $nlink) = @_;
 
-    # Get the list of files in the current directory.
+    my($dev, $ino, $mode, $subcount);
 
+    # Get the list of files in the current directory.
     opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return);
-    local(@filenames) = readdir(DIR);
+    my(@filenames) = readdir(DIR);
     closedir(DIR);
 
     if ($nlink == 2 && !$dont_use_nlink) {  # This dir has no subdirectories.
@@ -97,13 +139,16 @@ sub finddir {
 
 		# Get link count and check for directoriness.
 
-		($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink;
+		($dev,$ino,$mode,$nlink) = ($Is_VMS ? stat($_) : lstat($_));
+		    # unless ($nlink || $dont_use_nlink);
 		
 		if (-d _) {
 
 		    # It really is a directory, so do it recursively.
 
 		    if (!$prune && chdir $_) {
+			$name =~ s/\.dir$// if $Is_VMS;
+			$name =~ s/\\dir$// if $Is_NT;
 			&finddir($wanted,$name,$nlink);
 			chdir '..';
 		    }
@@ -114,44 +159,24 @@ sub finddir {
     }
 }
 
-# Usage:
-#	use File::Find;
-#
-#	finddepth(\&wanted, '/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 finddepth {
     my $wanted = shift;
-    chop($cwd = `pwd`);
+
+    $cwd = Cwd::fastcwd();;
+
+    # Localize these rather than lexicalizing them for backwards
+    # compatibility.
+    local($topdir, $topdev, $topino, $topmode, $topnlink);
     foreach $topdir (@_) {
 	(($topdev,$topino,$topmode,$topnlink) = stat($topdir))
 	  || (warn("Can't stat $topdir: $!\n"), next);
 	if (-d _) {
 	    if (chdir($topdir)) {
-		($fixtopdir = $topdir) =~ s,/$,, ;
+		my $fixtopdir = $topdir;
+		$fixtopdir =~ s,/$,, ;
+		$fixtopdir =~ s/\.dir$// if $Is_VMS;
+		$fixtopdir =~ s/\\dir$// if $Is_NT;
 		&finddepthdir($wanted,$fixtopdir,$topnlink);
 		($dir,$_) = ($fixtopdir,'.');
 		$name = $fixtopdir;
@@ -162,7 +187,7 @@ sub finddepth {
 	    }
 	}
 	else {
-	    unless (($dir,$_) = $topdir =~ m#^(.*/)(.*)$#) {
+	    unless (($_,$dir) = File::Basename::fileparse($topdir)) {
 		($dir,$_) = ('.', $topdir);
 	    }
 	    chdir $dir && &$wanted;
@@ -172,17 +197,17 @@ sub finddepth {
 }
 
 sub finddepthdir {
-    my($wanted,$dir,$nlink) = @_;
-    my($dev,$ino,$mode,$subcount);
-    my($name);
+    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";
     my(@filenames) = readdir(DIR);
     closedir(DIR);
 
-    if ($nlink == 2) {        # This dir has no subdirectories.
+    if ($nlink == 2 && !$dont_use_nlink) {   # This dir has no subdirectories.
 	for (@filenames) {
 	    next if $_ eq '.';
 	    next if $_ eq '..';
@@ -196,19 +221,21 @@ sub finddepthdir {
 	for (@filenames) {
 	    next if $_ eq '.';
 	    next if $_ eq '..';
-	    $nlink = $prune = 0;
+	    $nlink = 0;
 	    $name = "$dir/$_";
-	    if ($subcount > 0) {    # Seen all the subdirs?
+	    if ($subcount > 0 || $dont_use_nlink) {    # Seen all the subdirs?
 
 		# Get link count and check for directoriness.
 
-		($dev,$ino,$mode,$nlink) = lstat($_) unless $nlink;
+		($dev,$ino,$mode,$nlink) = ($Is_VMS ? stat($_) : lstat($_));
 		
 		if (-d _) {
 
 		    # It really is a directory, so do it recursively.
 
-		    if (!$prune && chdir $_) {
+		    if (chdir $_) {
+			$name =~ s/\.dir$// if $Is_VMS;
+			$name =~ s/\\dir$// if $Is_NT;
 			&finddepthdir($wanted,$name,$nlink);
 			chdir '..';
 		    }
@@ -220,5 +247,24 @@ sub finddepthdir {
     }
 }
 
+# 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'});
+
+# These are hard-coded for now, but may move to hint files.
+if ($^O eq 'VMS') {
+  $Is_VMS = 1;
+  $dont_use_nlink = 1;
+}
+if ($^O =~ m:^mswin32:i) {
+  $Is_NT = 1;
+  $dont_use_nlink = 1;
+}
+
+$dont_use_nlink = 1
+    if $^O eq 'os2' || $^O eq 'msdos' || $^O eq 'amigaos';
+
 1;