Aha!

[devedit.git] / modules / File / UseList.pm

diff --git a/modules/File/UseList.pm b/modules/File/UseList.pm
index 33ef12cf5ce3ae510446ba24f1f01e12eee74d6d..29db2983f39ff69f8fa9655c1e1e3c5a7f21b6c5 100644 (file)
--- a/modules/File/UseList.pm
+++ b/modules/File/UseList.pm
@@ -1,20 +1,19 @@
 package File::UseList;
 
 #
-# File::UseList
+# File::UseList 1.3
 #
 # Run a list with files that are currently in use
-# (bases upon Filing::UseList by Roland Bluethgen <calocybe@web.de>)
+# (bases on Filing::UseList by Roland Bluethgen <calocybe@web.de>)
 #
-# Author:        Patrick Canterino <patshaping@gmx.net>
-# Last modified: 09-26-2003
+# Author:        Patrick Canterino <patrick@patshaping.de>
+# Last modified: 2004-12-03
 #
 
 use strict;
 
 use Carp qw(croak);
-
-our $VERSION = '1.1';
+use Fcntl;
 
 # new()
 #
@@ -24,7 +23,7 @@ our $VERSION = '1.1';
 #               lockfile => Lock file (Default: List file + .lock)
 #               timeout  => Lock timeout in seconds (Default: 10)
 #
-# Return: File::UseList object
+# Return: File::UseList object (Blessed Reference)
 
 sub new(%)
 {
@@ -32,17 +31,16 @@ sub new(%)
 
  # Check if we got all the necessary information
 
- croak "Missing path of list file"              unless($args{'listfile'});
- $args{'lockfile'} = $args{'listfile'}.".lock"  unless($args{'lockfile'}); # Default filename of lock file
- $args{'timeout'}  = 10                         unless($args{'timeout'});  # Default timeout
+ croak "Missing path to list file"             unless($args{'listfile'});
+ $args{'lockfile'} = $args{'listfile'}.".lock" unless($args{'lockfile'}); # Default filename of lock file
+ $args{'timeout'}  = 10                        unless($args{'timeout'});  # Default timeout
 
- # Create $self
+ # Add some other information
 
- my $self = \%args;
- $self->{'files'}  = [];
- $self->{'locked'} = 0;
+ $args{'files'}  = [];
+ $args{'locked'} = 0;
 
- return bless($self,$class);
+ return bless(\%args,$class);
 }
 
 # lock()
@@ -98,24 +96,21 @@ sub unlock
 
  if($self->{'locked'})
  {
-  return 1 if(-f $lockfile); # Hmmm...
-
-  open(LOCKFILE,">",$lockfile) or return;
-  close(LOCKFILE)              or return;
+  sysopen(LOCKFILE,$lockfile,O_WRONLY | O_CREAT | O_TRUNC) or return;
+  close(LOCKFILE)                                          or return;
 
   $self->{'locked'} = 0;
-
   return 1;
  }
 
- # The list wasn't lock by ourselves
+ # The list wasn't lock by us or it isn't locked at all
 
  return;
 }
 
 # load()
 #
-# Load the list with files
+# Load the list with files from the list file
 #
 # Params: -nothing-
 #
@@ -129,9 +124,9 @@ sub load
 
  # Read out the file and split the content line-per-line
 
- open(FILE,"<".$file) or return;
+ sysopen(FILE,$file,O_RDONLY) or return;
  read(FILE, my $content, -s $file);
- close(FILE)          or return;
+ close(FILE)                  or return;
 
  my @files = split(/\015\012|\012|\015/,$content);
 
@@ -152,7 +147,7 @@ sub load
 
 # save()
 #
-# Save the list with files
+# Write the list with files back to the list file
 #
 # Params: -nothing-
 #
@@ -168,15 +163,13 @@ sub save
 
  my $data = (@$files) ? join("\n",@$files) : '';
 
- open(FILE,">",$temp) or return;
- print FILE $data     or do { close(FILE); return };
- close(FILE)          or return;
+ sysopen(FILE,$temp,O_WRONLY | O_CREAT | O_TRUNC) or return;
+ print FILE $data                                 or do { close(FILE); return };
+ close(FILE)                                      or return;
 
- rename($temp,$file) and return 1;
+ rename($temp,$file)                              or return;
 
- # Rubbish
-
- return;
+ return 1;
 }
 
 # add_file()
@@ -184,6 +177,8 @@ sub save
 # Add a file to the list
 #
 # Params: File
+#
+# Return: Status code (Boolean)
 
 sub add_file($)
 {
@@ -195,6 +190,7 @@ sub add_file($)
  return if($self->in_use($file));
 
  push(@$files,$file);
+ return 1;
 }
 
 # remove_file()
@@ -202,6 +198,8 @@ sub add_file($)
 # Remove a file from the list
 #
 # Params: File
+#
+# Return: Status code (Boolean)
 
 sub remove_file($)
 {
@@ -219,11 +217,28 @@ sub remove_file($)
   if($files->[$x] eq $file)
   {
    splice(@$files,$x,1);
-   last;
+   return 1;
   }
  }
 }
 
+# remove_all()
+#
+# Remove all files from the list
+#
+# Params: -nothing-
+#
+# Return: -nothing-
+
+sub remove_all
+{
+ my $self = shift;
+
+ $self->{'files'} = [];
+
+ return;
+}
+
 # in_use()
 #
 # Check if a file is in the list
@@ -263,4 +278,4 @@ sub unused($)
 1;
 
 #
-### Ende ###
\ No newline at end of file
+### End ###
\ No newline at end of file