#!/usr/bin/perl -w
-# Copyright © 2001-2009 Jamie Zawinski <jwz@jwz.org>.
+# Copyright © 2001-2011 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
# Under X11, the "xscreensaver-getimage" program invokes this script,
# depending on the value of the "chooseRandomImages" and "imageDirectory"
# settings in the ~/.xscreensaver file (or .../app-defaults/XScreenSaver).
+# The screen savers invoke "xscreensaver-getimage" via utils/grabclient.c,
+# which then invokes this script.
#
# Under Cocoa, this script lives inside the .saver bundle, and is invoked
# directly from utils/grabclient.c.
# errors about UTF-8 all over the place without this.
my $progname = $0; $progname =~ s@.*/@@g;
-my $version = q{ $Revision: 1.27 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+my $version = q{ $Revision: 1.29 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
my $verbose = 0;
my $skip_count_unstat = 0; # number of files skipped without stat'ing
my $skip_count_stat = 0; # number of files skipped after stat
-sub find_all_files {
+sub find_all_files($);
+sub find_all_files($) {
my ($dir) = @_;
print STDERR "$progname: + reading dir $dir/...\n" if ($verbose > 1);
- local *DIR;
- if (! opendir (DIR, $dir)) {
+ my $dd;
+ if (! opendir ($dd, $dir)) {
print STDERR "$progname: couldn't open $dir: $!\n" if ($verbose);
return;
}
- my @files = readdir (DIR);
- closedir (DIR);
+ my @files = readdir ($dd);
+ closedir ($dd);
my @dirs = ();
}
-sub spotlight_all_files {
+sub spotlight_all_files($) {
my ($dir) = @_;
my @terms = ();
# running at once, one will wait for the other, instead of both of
# them spanking the same file system at the same time.
#
-local *CACHE_FILE;
+my $cache_fd = undef;
my $cache_file_name = undef;
my $read_cache_p = 0;
if ($verbose > 1);
my $file = $cache_file_name;
- open (CACHE_FILE, "+>>$file") || error ("unable to write $file: $!");
- flock (CACHE_FILE, LOCK_EX) || error ("unable to lock $file: $!");
- seek (CACHE_FILE, 0, 0) || error ("unable to rewind $file: $!");
+ open ($cache_fd, '+>>', $file) || error ("unable to write $file: $!");
+ flock ($cache_fd, LOCK_EX) || error ("unable to lock $file: $!");
+ seek ($cache_fd, 0, 0) || error ("unable to rewind $file: $!");
- my $mtime = (stat(CACHE_FILE))[9];
+ my $mtime = (stat($cache_fd))[9];
if ($mtime + $cache_max_age < time) {
print STDERR "$progname: cache is too old\n" if ($verbose);
return ();
}
- my $odir = <CACHE_FILE>;
+ my $odir = <$cache_fd>;
$odir =~ s/[\r\n]+$//s if defined ($odir);
if (!defined ($odir) || ($dir ne $odir)) {
print STDERR "$progname: cache is for $odir, not $dir\n"
}
my @files = ();
- while (<CACHE_FILE>) {
+ while (<$cache_fd>) {
s/[\r\n]+$//s;
push @files, "$odir/$_";
}
if (! $read_cache_p) {
- truncate (CACHE_FILE, 0) ||
+ truncate ($cache_fd, 0) ||
error ("unable to truncate $cache_file_name: $!");
- seek (CACHE_FILE, 0, 0) ||
+ seek ($cache_fd, 0, 0) ||
error ("unable to rewind $cache_file_name: $!");
if ($#all_files >= 0) {
- print CACHE_FILE "$dir\n";
- my $re = qr/$dir/;
+ print $cache_fd "$dir\n";
foreach (@all_files) {
my $f = $_; # stupid Perl. do this to avoid modifying @all_files!
- $f =~ s@^$re/@@so || die;
- print CACHE_FILE "$f\n";
+ $f =~ s@^\Q$dir\L/@@so || die; # remove $dir from front
+ print $cache_fd "$f\n";
}
}
if ($verbose);
}
- flock (CACHE_FILE, LOCK_UN) ||
+ flock ($cache_fd, LOCK_UN) ||
error ("unable to unlock $cache_file_name: $!");
- close (CACHE_FILE);
+ close ($cache_fd);
+ $cache_fd = undef;
}
sub find_random_file($) {
my ($dir) = @_;
- $dir =~ s@/+$@@g;
-
if ($use_spotlight_p == -1) {
$use_spotlight_p = 0;
if (-x '/usr/bin/mdfind') {
write_cache ($dir);
- @all_files = sort(@all_files);
+# @all_files = sort(@all_files);
if ($#all_files < 0) {
print STDERR "$progname: no files in $dir\n";
my $n = int (rand ($#all_files + 1));
my $file = $all_files[$n];
if (large_enough_p ($file)) {
+ $file =~ s@^\Q$dir\L/@@so || die; # remove $dir from front
return $file;
}
}
}
-sub large_enough_p {
+sub large_enough_p($) {
my ($file) = @_;
my ($w, $h) = image_file_size ($file);
# Given the raw body of a GIF document, returns the dimensions of the image.
#
-sub gif_size {
+sub gif_size($) {
my ($body) = @_;
my $type = substr($body, 0, 6);
my $s;
# Given the raw body of a JPEG document, returns the dimensions of the image.
#
-sub jpeg_size {
+sub jpeg_size($) {
my ($body) = @_;
my $i = 0;
my $L = length($body);
# Given the raw body of a PNG document, returns the dimensions of the image.
#
-sub png_size {
+sub png_size($) {
my ($body) = @_;
return () unless ($body =~ m/^\211PNG\r/s);
my ($bits) = ($body =~ m/^.{12}(.{12})/s);
# Given the raw body of a GIF, JPEG, or PNG document, returns the dimensions
# of the image.
#
-sub image_size {
+sub image_size($) {
my ($body) = @_;
return () if (length($body) < 10);
my ($w, $h) = gif_size ($body);
# Returns the dimensions of the image file.
#
-sub image_file_size {
+sub image_file_size($) {
my ($file) = @_;
- local *IN;
- if (! open (IN, "<$file")) {
+ my $in;
+ if (! open ($in, '<', $file)) {
print STDERR "$progname: $file: $!\n" if ($verbose);
return undef;
}
- binmode (IN); # Larry can take Unicode and shove it up his ass sideways.
+ binmode ($in); # Larry can take Unicode and shove it up his ass sideways.
my $body = '';
- sysread (IN, $body, 1024 * 50); # The first 50k should be enough.
- close IN; # (It's not for certain huge jpegs...
+ sysread ($in, $body, 1024 * 50); # The first 50k should be enough.
+ close $in; # (It's not for certain huge jpegs...
return image_size ($body); # but we know they're huge!)
}
exit 1;
}
-sub usage {
+sub usage() {
print STDERR "usage: $progname [--verbose] directory\n" .
" Prints the name of a randomly-selected image file. The directory\n" .
" is searched recursively. Images smaller than " .
exit 1;
}
-sub main {
+sub main() {
my $dir = undef;
while ($_ = $ARGV[0]) {
usage unless (defined($dir));
$dir =~ s@^~/@$ENV{HOME}/@s; # allow literal "~/"
+ $dir =~ s@/+$@@s; # omit trailing /
if (! -d $dir) {
print STDERR "$progname: $dir: not a directory\n";
projects / xscreensaver / blobdiff