http://packetstormsecurity.org/UNIX/admin/xscreensaver-4.01.tar.gz

[xscreensaver] / driver / xscreensaver-getimage-file

diff --git a/driver/xscreensaver-getimage-file b/driver/xscreensaver-getimage-file
index 0766d9ed91acedbe19fb7d9383b9b71f7e6586fd..2da17d5958522b907faeff90deed9f1583398441 100755 (executable)
--- a/driver/xscreensaver-getimage-file
+++ b/driver/xscreensaver-getimage-file
@@ -1,5 +1,5 @@
 #!/usr/bin/perl -w
-# Copyright © 2001 Jamie Zawinski <jwz@jwz.org>, all rights reserved.
+# Copyright © 2001, 2002 Jamie Zawinski <jwz@jwz.org>.
 #
 # Permission to use, copy, modify, distribute, and sell this software and its
 # documentation for any purpose is hereby granted without fee, provided that
@@ -29,10 +29,10 @@ use strict;
 
 use POSIX;
 use Fcntl;
-
+use Fcntl ':mode';
 
 my $progname = $0; $progname =~ s@.*/@@g;
-my $version = q{ $Revision: 1.4 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+my $version = q{ $Revision: 1.8 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
 
 my $verbose = 0;
 
@@ -43,11 +43,11 @@ my $verbose = 0;
 # If you add other programs to this list, please let me know!
 #
 my @programs = (
+  "chbg       -once -xscreensaver -max_grow 4 -max_size 100",
   "xv         -root -quit -viewonly -maxpect -noresetroot -quick24 -rmode 5" .
   "           -rfg black -rbg black",
   "xli        -quiet -fullscreen -onroot -center -border black",
   "xloadimage -quiet -fullscreen -onroot -center -border black",
-  "chbg       -once -xscreensaver -max_grow 4",
 
 # this lame program wasn't built with vroot.h:
 # "xsri       -scale -keep-aspect -center-horizontal -center-vertical",
@@ -99,8 +99,21 @@ sub find_all_files {
     next if ($file eq "core");
 
     $file = "$dir/$file";
+    my @st = stat($file);
     my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
-        $atime,$mtime,$ctime,$blksize,$blocks) = stat($file);
+        $atime,$mtime,$ctime,$blksize,$blocks) = @st;
+
+    if ($#st == -1) {
+      if ($verbose) {
+        my $ll = readlink $file;
+        if (defined ($ll)) {
+          print STDERR "$progname: dangling symlink: $file -> $ll\n";
+        } else {
+          print STDERR "$progname: unreadable: $file\n";
+        }
+      }
+      next;
+    }
 
     next if ($seen_inodes{$ino}); # break symlink loops
     $seen_inodes{$ino} = 1;
@@ -129,11 +142,17 @@ sub find_random_file {
 
   print STDERR "$progname: recursively reading $dir...\n" if ($verbose > 1);
   find_all_files ($dir);
-  print STDERR "$progname: found $#all_files files\n" if ($verbose > 1);
+  print STDERR "$progname: found " . ($#all_files+1) . " files\n"
+    if ($verbose > 1);
 
   @all_files = sort(@all_files);
 
-  my $n = int (rand ($#all_files));
+  if ($#all_files < 0) {
+    print STDERR "$progname: no files in $dir\n";
+    exit 1;
+  }
+
+  my $n = int (rand ($#all_files + 1));
   my $file = $all_files[$n];
 
   print STDERR "$progname: chose file $n: $file\n" if ($verbose > 1);