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-rwxr-xr-xdriver/xscreensaver-text899
1 files changed, 0 insertions, 899 deletions
diff --git a/driver/xscreensaver-text b/driver/xscreensaver-text
deleted file mode 100755
index eca1fbf..0000000
--- a/driver/xscreensaver-text
+++ /dev/null
@@ -1,899 +0,0 @@
-#!/usr/bin/perl -w
-# Copyright © 2005-2019 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
-# the above copyright notice appear in all copies and that both that
-# copyright notice and this permission notice appear in supporting
-# documentation. No representations are made about the suitability of this
-# software for any purpose. It is provided "as is" without express or
-# implied warranty.
-#
-# This program writes some text to stdout, based on preferences in the
-# .xscreensaver file. It may load a file, a URL, run a program, or just
-# print the date.
-#
-# In a native MacOS build of xscreensaver, this script is included in
-# the Contents/Resources/ directory of each screen saver .bundle that
-# uses it; and in that case, it looks up its resources using
-# /usr/bin/defaults instead.
-#
-# Created: 19-Mar-2005.
-
-require 5;
-#use diagnostics; # Fails on some MacOS 10.5 systems
-use strict;
-
-# Some Linux systems don't install LWP by default!
-# Only error out if we're actually loading a URL instead of local data.
-BEGIN { eval 'use LWP::UserAgent;' }
-
-# Not sure how prevalent this is. Hope it's part of the default install.
-BEGIN { eval 'use HTML::Entities;' }
-
-use Socket;
-use POSIX qw(strftime);
-use Text::Wrap qw(wrap);
-#use bytes; # This breaks shit.
-
-my $progname = $0; $progname =~ s@.*/@@g;
-my ($version) = ('$Revision: 1.48 $' =~ m/\s(\d[.\d]+)\s/s);
-
-my $verbose = 0;
-my $http_proxy = undef;
-
-my $config_file = $ENV{HOME} . "/.xscreensaver";
-my $text_mode = 'date';
-my $text_literal = '';
-my $text_file = '';
-my $text_program = '';
-my $text_url = 'https://en.wikipedia.org/w/index.php?title=Special:NewPages&feed=rss';
-# Default URL needs to be set and match what's in OSX/XScreenSaverView.m
-
-my $wrap_columns = undef;
-my $truncate_lines = undef;
-my $latin1_p = 0;
-my $nyarlathotep_p = 0;
-
-
-# Convert any HTML entities to Latin1 characters.
-#
-sub de_entify($) {
- my ($text) = @_;
-
- return '' unless defined($text);
- return $text unless ($text =~ m/&/s);
-
- # Convert any HTML entities to Unicode characters,
- # if the HTML::Entities module is installed.
- eval {
- my $t2 = $text;
- $text = undef;
- $text = HTML::Entities::decode_entities ($t2);
- };
- return $text if defined($text);
-
- # If it's not installed, just complain instead of trying to halfass it.
- print STDOUT ("\n\tPerl is broken. Do this to repair it:\n" .
- "\n\tsudo cpan HTML::Entities\n\n");
- exit (1);
-}
-
-
-# Convert any Unicode characters to Latin1 if possible.
-# Unconvertable bytes are left alone.
-#
-sub utf8_to_latin1($) {
- my ($text) = @_;
-
- utf8::encode ($text); # Unpack Unicode back to multi-byte UTF-8.
-
- # Maybe it would be better to handle this in the Unicode domain
- # by doing things like s/\x{2018}/\"/g, but without decoding the
- # string back to UTF-8 first, I'm at a loss as to how to have
- # "&aacute;" print as "\340" instead of as "\303\240".
-
- $text =~ s/ \xC2 ( [\xA0-\xFF] ) / $1 /gsex;
- $text =~ s/ \xC3 ( [\x80-\xFF] ) / chr (ord($1) | 0x40) /gsex;
-
- # Handles a few 3-byte sequences too.
- $text =~ s/\xE2\x80\x93/--/gs;
- $text =~ s/\xE2\x80\x94/--/gs;
- $text =~ s/\xE2\x80\x98/`/gs;
- $text =~ s/\xE2\x80\x99/'/gs;
- $text =~ s/\xE2\x80\x9C/``/gs;
- $text =~ s/\xE2\x80\x9D/'/gs;
- $text =~ s/\xE2\x80\xA2/&bull;/gs;
- $text =~ s/\xE2\x80\xA6/.../gs;
- $text =~ s/\xE2\x80\xB2/'/gs;
- $text =~ s/\xE2\x84\xA2/&trade;/gs;
- $text =~ s/\xE2\x86\x90/ &larr; /gs;
-
- return $text;
-}
-
-
-# Reads the prefs we use from ~/.xscreensaver
-#
-sub get_x11_prefs() {
- my $got_any_p = 0;
-
- if (open (my $in, '<', $config_file)) {
- print STDERR "$progname: reading $config_file\n" if ($verbose > 1);
- local $/ = undef; # read entire file
- my $body = <$in>;
- close $in;
- $got_any_p = get_x11_prefs_1 ($body);
-
- } elsif ($verbose > 1) {
- print STDERR "$progname: $config_file: $!\n";
- }
-
- if (! $got_any_p && defined ($ENV{DISPLAY})) {
- # We weren't able to read settings from the .xscreensaver file.
- # Fall back to any settings in the X resource database
- # (/usr/X11R6/lib/X11/app-defaults/XScreenSaver)
- #
- print STDERR "$progname: reading X resources\n" if ($verbose > 1);
- my $body = `appres XScreenSaver xscreensaver -1`;
- $got_any_p = get_x11_prefs_1 ($body);
- }
-
- if ($verbose > 1) {
- print STDERR "$progname: mode: $text_mode\n";
- print STDERR "$progname: literal: $text_literal\n";
- print STDERR "$progname: file: $text_file\n";
- print STDERR "$progname: program: $text_program\n";
- print STDERR "$progname: url: $text_url\n";
- }
-
- $text_mode =~ tr/A-Z/a-z/;
- $text_literal =~ s@\\n@\n@gs;
- $text_literal =~ s@\\\n@\n@gs;
-}
-
-
-sub get_x11_prefs_1($) {
- my ($body) = @_;
-
- my $got_any_p = 0;
- $body =~ s@\\\n@@gs;
- $body =~ s@^[ \t]*#[^\n]*$@@gm;
-
- if ($body =~ m/^[.*]*textMode:[ \t]*([^\s]+)\s*$/im) {
- $text_mode = $1;
- $got_any_p = 1;
- }
- if ($body =~ m/^[.*]*textLiteral:[ \t]*(.*?)[ \t]*$/im) {
- $text_literal = $1;
- }
- if ($body =~ m/^[.*]*textFile:[ \t]*(.*?)[ \t]*$/im) {
- $text_file = $1;
- }
- if ($body =~ m/^[.*]*textProgram:[ \t]*(.*?)[ \t]*$/im) {
- $text_program = $1;
- }
- if ($body =~ m/^[.*]*textURL:[ \t]*(.*?)[ \t]*$/im) {
- $text_url = $1;
- }
-
- return $got_any_p;
-}
-
-
-sub get_cocoa_prefs($) {
- my ($id) = @_;
- my $v;
-
- print STDERR "$progname: reading Cocoa prefs: \"$id\"\n" if ($verbose > 1);
-
- $v = get_cocoa_pref_1 ($id, "textMode");
- $text_mode = $v if defined ($v);
-
- # The "textMode" pref is set to a number instead of a string because I
- # couldn't figure out the black magic to make Cocoa bindings work right.
- #
- # Update: as of 5.33, Cocoa writes strings instead of numbers, but
- # pre-existing saved preferences might still have numbers in them.
- #
- if ($text_mode eq '0') { $text_mode = 'date'; }
- elsif ($text_mode eq '1') { $text_mode = 'literal'; }
- elsif ($text_mode eq '2') { $text_mode = 'file'; }
- elsif ($text_mode eq '3') { $text_mode = 'url'; }
- elsif ($text_mode eq '4') { $text_mode = 'program'; }
-
- $v = get_cocoa_pref_1 ($id, "textLiteral");
- $text_literal = $v if defined ($v);
- $text_literal =~ s@\\n@\n@gs;
- $text_literal =~ s@\\\n@\n@gs;
-
- $v = get_cocoa_pref_1 ($id, "textFile");
- $text_file = $v if defined ($v);
-
- $v = get_cocoa_pref_1 ($id, "textProgram");
- $text_program = $v if defined ($v);
-
- $v = get_cocoa_pref_1 ($id, "textURL");
- $text_url = $v if defined ($v);
-}
-
-
-sub get_cocoa_pref_1($$) {
- my ($id, $key) = @_;
- # make sure there's nothing stupid/malicious in either string.
- $id =~ s/[^-a-z\d. ]/_/gsi;
- $key =~ s/[^-a-z\d. ]/_/gsi;
- my $cmd = "defaults -currentHost read \"$id\" \"$key\"";
-
- print STDERR "$progname: executing $cmd\n"
- if ($verbose > 3);
-
- my $val = `$cmd 2>/dev/null`;
- $val =~ s/^\s+//s;
- $val =~ s/\s+$//s;
-
- print STDERR "$progname: Cocoa: $id $key = \"$val\"\n"
- if ($verbose > 2);
-
- $val = undef if ($val =~ m/^$/s);
-
- return $val;
-}
-
-
-# like system() but checks errors.
-#
-sub safe_system(@) {
- my (@cmd) = @_;
-
- print STDERR "$progname: executing " . join(' ', @cmd) . "\n"
- if ($verbose > 3);
-
- system @cmd;
- my $exit_value = $? >> 8;
- my $signal_num = $? & 127;
- my $dumped_core = $? & 128;
- error ("$cmd[0]: core dumped!") if ($dumped_core);
- error ("$cmd[0]: signal $signal_num!") if ($signal_num);
- error ("$cmd[0]: exited with $exit_value!") if ($exit_value);
-}
-
-
-sub which($) {
- my ($cmd) = @_;
-
- if ($cmd =~ m@^\./|^/@) {
- error ("cannot execute $cmd") unless (-x $cmd);
- return $cmd;
- }
-
- foreach my $dir (split (/:/, $ENV{PATH})) {
- my $cmd2 = "$dir/$cmd";
- print STDERR "$progname: checking $cmd2\n" if ($verbose > 3);
- return $cmd2 if (-x "$cmd2");
- }
- error ("$cmd not found on \$PATH");
-}
-
-
-sub output() {
-
- binmode (STDOUT, ($latin1_p ? ':raw' : ':utf8'));
- binmode (STDERR, ':utf8');
-
- # Do some basic sanity checking (null text, null file names, etc.)
- #
- if (($text_mode eq 'literal' && $text_literal =~ m/^\s*$/i) ||
- ($text_mode eq 'file' && $text_file =~ m/^\s*$/i) ||
- ($text_mode eq 'program' && $text_program =~ m/^\s*$/i) ||
- ($text_mode eq 'url' && $text_url =~ m/^\s*$/i)) {
- print STDERR "$progname: falling back to 'date'\n" if ($verbose);
- $text_mode = 'date';
- }
-
- if ($text_mode eq 'literal') {
- $text_literal = strftime ($text_literal, localtime);
- $text_literal = utf8_to_latin1($text_literal) if ($latin1_p);
- $text_literal =~ y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
- print STDOUT $text_literal;
- print STDOUT "\n" unless ($text_literal =~ m/\n$/s);
-
- } elsif ($text_mode eq 'file') {
-
- $text_file =~ s@^~/@$ENV{HOME}/@s; # allow literal "~/"
-
- if (open (my $in, '<:raw', $text_file)) {
- print STDERR "$progname: reading $text_file\n" if ($verbose);
- binmode (STDOUT, ':raw');
-
- if (($wrap_columns && $wrap_columns > 0) || $truncate_lines) {
- # read it, then reformat it.
- local $/ = undef; # read entire file
- my $body = <$in>;
- $body = reformat_text ($body);
- print STDOUT $body;
- } else {
- # stream it by lines
- while (<$in>) {
- $_ = utf8_to_latin1($_) if ($latin1_p);
- y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
- print STDOUT $_;
- }
- }
- close $in;
- } else {
- error ("$text_file: $!");
- }
-
- } elsif ($text_mode eq 'program') {
-
- my ($prog, $args) = ($text_program =~ m/^([^\s]+)(.*)$/);
- $text_program = which ($prog) . $args;
- print STDERR "$progname: running $text_program\n" if ($verbose);
-
- if (($wrap_columns && $wrap_columns > 0) || $truncate_lines) {
- # read it, then reformat it.
- my $lines = 0;
- my $body = "";
- my $cmd = "( $text_program ) 2>&1";
- # $cmd .= " | sed -l"; # line buffer instead of 4k pipe buffer
- open (my $pipe, '-|:unix', $cmd);
- while (my $line = <$pipe>) {
- $body .= $line;
- $lines++;
- last if ($truncate_lines && $lines > $truncate_lines);
- }
- close $pipe;
-
- # I don't understand why we must do this here, but must not do this
- # in the 'file' branch above, which reads the file with :raw...
- utf8::decode ($body); # Pack multi-byte UTF-8 back into wide chars.
-
- $body = reformat_text ($body);
- print STDOUT $body;
- } else {
- # stream it
- safe_system ("$text_program");
- }
-
- } elsif ($text_mode eq 'url') {
-
- get_url_text ($text_url);
-
- } else { # $text_mode eq 'date'
-
- my $n = `uname -n`;
- $n =~ s/\.local\n/\n/s;
- print $n;
-
- my $unamep = 1;
-
- if (-f "/etc/redhat-release") { # "Fedora Core release 4 (Stentz)"
- safe_system ("cat", "/etc/redhat-release");
- }
-
- if (-f "/etc/release") { # "Solaris 10 3/05 s10_74L2a X86"
- safe_system ("head", "-1", "/etc/release");
- }
-
- if (-f "/usr/sbin/system_profiler") { # "Mac OS X 10.4.5 (8H14)"
- my $sp = # "iMac G5"
- `/usr/sbin/system_profiler SPSoftwareDataType SPHardwareDataType 2>/dev/null`;
- # system_profiler on OS X 10.10 generates spurious error messages.
- my ($v) = ($sp =~ m/^\s*System Version:\s*(.*)$/mi);
- my ($s) = ($sp =~ m/^\s*(?:CPU|Processor) Speed:\s*(.*)$/mi);
- my ($t) = ($sp =~ m/^\s*(?:Machine|Model) Name:\s*(.*)$/mi);
- print "$v\n" if ($v);
- print "$s $t\n" if ($s && $t);
- $unamep = !defined ($v);
- }
-
- if ($unamep) {
- safe_system ("uname", "-sr"); # "Linux 2.6.15-1.1831_FC4"
- }
-
- print "\n";
- safe_system ("date", "+%c");
- print "\n";
- my $ut = `uptime`;
- $ut =~ s/^[ \d:]*(am|pm)?//i;
- $ut =~ s/,\s*(load)/\n$1/;
- print "$ut\n";
- }
-
-}
-
-
-# Make an educated guess as to what's in this document.
-# We don't necessarily take the Content-Type header at face value.
-# Returns 'html', 'rss', or 'text';
-#
-sub guess_content_type($$) {
- my ($ct, $body) = @_;
-
- $body =~ s/^(.{512}).*/$1/s; # only look in first half K of file
-
- if ($ct =~ m@^text/.*html@i) { return 'html'; }
- if ($ct =~ m@\b(atom|rss|xml)\b@i) { return 'rss'; }
-
- if ($body =~ m@^\s*<\?xml@is) { return 'rss'; }
- if ($body =~ m@^\s*<!DOCTYPE RSS@is) { return 'rss'; }
- if ($body =~ m@^\s*<!DOCTYPE HTML@is) { return 'html'; }
-
- if ($body =~ m@<(BASE|HTML|HEAD|BODY|SCRIPT|STYLE|TABLE|A\s+HREF)\b@i) {
- return 'html';
- }
-
- if ($body =~ m@<(RSS|CHANNEL|GENERATOR|DESCRIPTION|CONTENT|FEED|ENTRY)\b@i) {
- return 'rss';
- }
-
- return 'text';
-}
-
-
-sub reformat_html($$) {
- my ($body, $rss_p) = @_;
- $_ = $body;
-
- # In HTML, try to preserve newlines inside of PRE.
- #
- if (! $rss_p) {
- s@(<PRE\b[^<>]*>\s*)(.*?)(</PRE)@{
- my ($a, $b, $c) = ($1, $2, $3);
- $b =~ s/[\r\n]/<BR>/gs;
- $a . $b . $c;
- }@gsexi;
- }
-
- if (! $rss_p) {
- # In HTML, unfold lines.
- # In RSS, assume \n means literal line break.
- s@[\r\n]@ @gsi;
- }
-
- # This right here is the part where I doom us all to inhuman
- # toil for the One whose Name cannot be expressed in the
- # Basic Multilingual Plane. http://jwz.org/b/yhAT He comes.
-
- s@<!--.*?-->@@gsi; # lose comments
- s@<(STYLE|SCRIPT)\b[^<>]*>.*?</\1\s*>@@gsi; # lose css and js
-
- s@</?(BR|TR|TD|LI|DIV)\b[^<>]*>@\n@gsi; # line break at BR, TD, DIV, etc
- s@</?(P|UL|OL|BLOCKQUOTE)\b[^<>]*>@\n\n@gsi; # two line breaks
-
- s@<lj\s+user=\"?([^<>\"]+)\"?[^<>]*>?@$1@gsi; # handle <LJ USER=>
- s@</?[BI]>@*@gsi; # bold, italic => asterisks
-
-
- s@<[^<>]*>?@@gs; # lose all other HTML tags
- $_ = de_entify ($_); # convert HTML entities
-
- # For Wikipedia: delete anything inside {{ }} and unwrap [[tags]],
- # among other things.
- #
- if ($rss_p eq 'wiki') {
-
- s@<!--.*?-->@@gsi; # lose HTML comments again
-
- # Creation line is often truncated: screws up parsing with unbalanced {{.
- s@(: +[^a-zA-Z ]* *Created page) with [^\n]+@$1@s;
-
- s@/\*.*?\*/@@si; # /* ... */
-
- # Try to omit all tables, since they're impossible to read as text.
- #
- 1 while (s/\{\{[^{}]*}}/ /gs); # {{ ... }}
- 1 while (s/\{\|.*?\|\}/\n\n/gs); # {| ... |}
- 1 while (s/\|-.*?\|/ /gs); # |- ... | (table cell)
-
- # Convert anchors to something more readable.
- #
- s/\[\[([^\[\]\|]+)\|([^\[\]]+)\]\]/$2/gs; # [[link|anchor]]
- s/\[\[([^:\[\]\|]+)\]\]/$1/gs; # [[anchor]]
- s/\[https?:[^\[\]\s]+\s+([^\[\]]+)\]/$1/gs; # [url anchor]
-
- # Convert all references to asterisks.
- s@\s*<ref>\s*.*?</ref>@*@gs; # <ref> ... <ref> -> "*"
- s@\n[ \t]*\d+\s*\^\s*http[^\s]+[ \t]*\n@\n@gs; # 1 ^ URL (a Reflist)
-
- s@\[\[File:([^\|\]]+).*?\]\]@\n$1\n@gs; # [[File: X | ... ]]
- s@\[\[Category:.*?\]\]@@gs; # omit categories
-
- s/<[^<>]*>//gs; # Omit all remaining tags
- s/\'{3,}//gs; # Omit ''' and ''''
- s/\'\'/\"/gs; # '' -> "
- s/\`\`/\"/gs; # `` -> "
- s/\"\"+/\"/gs; # "" -> "
-
- s/^[ \t]*[*#]+[ \t]*$//gm; # Omit lines with just * or # on them
-
- # Omit trailing headlines with no text after them (e.g. == Notes ==)
- 1 while (s/\n==+[ \t]*[^\n=]+[ \t]*==+\s*$/\n/s);
-
- $_ = de_entify ($_); # convert HTML entities, again
- }
-
-
- # elide any remaining non-Latin1 binary data.
- if ($latin1_p) {
- utf8::encode ($_); # Unpack Unicode back to multi-byte UTF-8.
- s/([^\000-\176]+(\s*[^\000-\176]+)[^a-z\d]*)/\xAB...\xBB /g;
- }
-
- $_ .= "\n";
-
- s/[ \t]+$//gm; # lose whitespace at end of line
- s@\n\n\n+@\n\n@gs; # compress blank lines
-
- if (!defined($wrap_columns) || $wrap_columns > 0) {
- $Text::Wrap::columns = ($wrap_columns || 72);
- $Text::Wrap::break = '[\s/|]'; # wrap on slashes for URLs
- $_ = wrap ("", " ", $_); # wrap the lines as a paragraph
- s/[ \t]+$//gm; # lose whitespace at end of line again
- }
-
- s/^\n+//gs;
-
- if ($truncate_lines) {
- s/^(([^\n]*\n){$truncate_lines}).*$/$1/s;
- }
-
- $_ = utf8_to_latin1($_) if ($latin1_p);
- y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
-
- return $_;
-}
-
-
-sub reformat_rss($) {
- my ($body) = @_;
-
- my $wiki_p = ($body =~ m@<generator>[^<>]*Wiki@si);
-
- $body =~ s/(<(ITEM|ENTRY)\b)/\001\001$1/gsi;
- my @items = split (/\001\001/, $body);
-
- print STDERR "$progname: converting RSS ($#items items)...\n"
- if ($verbose > 2);
-
- shift @items;
-
- # Let's skip forward in the stream by a random amount, so that if
- # two copies of ljlatest are running at the same time (e.g., on a
- # multi-headed machine), they get different text. (Put the items
- # that we take off the front back on the back.)
- #
- if ($#items > 7) {
- my $n = int (rand ($#items - 5));
- print STDERR "$progname: rotating by $n items...\n" if ($verbose > 2);
- while ($n-- > 0) {
- push @items, (shift @items);
- }
- }
-
- my $out = '';
-
- my $i = -1;
- foreach (@items) {
- $i++;
-
- my ($title, $author, $body1, $body2, $body3);
-
- $title = $3 if (m@<((TITLE) [^<>\s]*)[^<>]*>\s*(.*?)\s*</\1>@xsi);
- $author= $3 if (m@<((DC:CREATOR) [^<>\s]*)[^<>]*>\s*(.*?)\s*</\1>@xsi);
- $body1 = $3 if (m@<((DESCRIPTION) [^<>\s]*)[^<>]*>\s*(.*?)\s*</\1>@xsi);
- $body2 = $3 if (m@<((CONTENT) [^<>\s]*)[^<>]*>\s*(.*?)\s*</\1>@xsi);
- $body3 = $3 if (m@<((SUMMARY) [^<>\s]*)[^<>]*>\s*(.*?)\s*</\1>@xsi);
-
- # If there are both <description> and <content> or <content:encoded>,
- # use whichever one contains more text.
- #
- if ($body3 && length($body3) >= length($body2 || '')) {
- $body2 = $body3;
- }
- if ($body2 && length($body2) >= length($body1 || '')) {
- $body1 = $body2;
- }
-
- if (! $body1) {
- if ($title) {
- print STDERR "$progname: no body in item $i (\"$title\")\n"
- if ($verbose > 2);
- } else {
- print STDERR "$progname: no body or title in item $i\n"
- if ($verbose > 2);
- next;
- }
- }
-
- $title = rss_field_to_html ($title || '');
- $author= rss_field_to_html ($author || '');
- $body1 = rss_field_to_html ($body1 || '');
-
- $title = '' if ($body1 eq $title); # Identical in Twitter's atom feed.
-
- # Omit author if it's in the title or body
- $author = '' if ($author &&
- ($title =~ m/\Q$author\E/si ||
- $body1 =~ m/\Q$author\E/si));
-
- $title = $author if ($author && !$title);
- $title = "$author: $title" if ($author && $title);
-
- $out .= reformat_html ("$title<P>$body1", $wiki_p ? 'wiki' : 'rss');
- $out .= "\n";
- }
-
- if ($truncate_lines) {
- $out =~ s/^(([^\n]*\n){$truncate_lines}).*$/$1/s;
- }
-
- return $out;
-}
-
-
-sub rss_field_to_html($) {
- my ($body) = @_;
-
- # If <![CDATA[...]]> is present, everything inside that is HTML,
- # and not double-encoded.
- #
- if ($body =~ m/^\s*<!\[CDATA\[(.*?)\]\s*\]/is) {
- $body = $1;
- } else {
- $body = de_entify ($body); # convert entities to get HTML from XML
- }
-
- return $body;
-}
-
-
-sub reformat_text($) {
- my ($body) = @_;
-
- # only re-wrap if --cols was specified. Otherwise, dump it as is.
- #
- if ($wrap_columns && $wrap_columns > 0) {
- print STDERR "$progname: wrapping at $wrap_columns...\n" if ($verbose > 2);
- $Text::Wrap::columns = $wrap_columns;
- $Text::Wrap::break = '[\s/]'; # wrap on slashes for URLs
- $body = wrap ("", "", $body);
- $body =~ s/[ \t]+$//gm;
- }
-
- if ($truncate_lines) {
- $body =~ s/^(([^\n]*\n){$truncate_lines}).*$/$1/s;
- }
-
- $body = utf8_to_latin1($body) if ($latin1_p);
- $body =~ y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
- return $body;
-}
-
-
-# Figure out what the proxy server should be, either from environment
-# variables or by parsing the output of the (MacOS) program "scutil",
-# which tells us what the system-wide proxy settings are.
-#
-sub set_proxy($) {
- my ($ua) = @_;
-
- my $proxy_data = `scutil --proxy 2>/dev/null`;
- foreach my $proto ('http', 'https') {
- my ($server) = ($proxy_data =~ m/\b${proto}Proxy\s*:\s*([^\s]+)/si);
- my ($port) = ($proxy_data =~ m/\b${proto}Port\s*:\s*([^\s]+)/si);
- my ($enable) = ($proxy_data =~ m/\b${proto}Enable\s*:\s*([^\s]+)/si);
-
- if ($server && $enable) {
- # Note: this ignores the "ExceptionsList".
- my $proto2 = 'http';
- $ENV{"${proto}_proxy"} = ("${proto2}://" . $server .
- ($port ? ":$port" : "") . "/");
- print STDERR "$progname: MacOS $proto proxy: " .
- $ENV{"${proto}_proxy"} . "\n"
- if ($verbose > 2);
- }
- }
-
- $ua->env_proxy();
-}
-
-
-sub get_url_text($) {
- my ($url) = @_;
-
- my $ua = eval 'LWP::UserAgent->new';
-
- if (! $ua) {
- print STDOUT ("\n\tPerl is broken. Do this to repair it:\n" .
- "\n\tsudo cpan LWP::UserAgent" .
- " LWP::Protocol::https Mozilla::CA\n\n");
- return;
- }
-
- # Half the time, random Linux systems don't have Mozilla::CA installed,
- # which results in "Can't verify SSL peers without knowning which
- # Certificate Authorities to trust".
- #
- # I'm going to take a controversial stand here and say that, for the
- # purposes of plain-text being displayed in a screen saver via RSS,
- # the chances of a certificate-based man-in-the-middle attack having
- # a malicious effect on anyone anywhere at any time is so close to
- # zero that it can be discounted. So, just don't bother validating
- # SSL connections.
- #
- $ENV{'PERL_LWP_SSL_VERIFY_HOSTNAME'} = 0;
- eval {
- $ua->ssl_opts (verify_hostname => 0, SSL_verify_mode => 0);
- };
-
-
- set_proxy ($ua);
- $ua->agent ("$progname/$version");
- my $res = $ua->get ($url);
- my $body;
- my $ct;
-
- if ($res && $res->is_success) {
- $body = $res->decoded_content || '';
- $ct = $res->header ('Content-Type') || 'text/plain';
-
- } else {
- my $err = ($res ? $res->status_line : '') || '';
- $err = 'unknown error' unless $err;
- $err = "$url: $err";
- # error ($err);
- $body = "Error loading URL $err\n\n";
- $ct = 'text/plain';
- }
-
- # This is not necessary, since HTTP::Message::decoded_content() has
- # already done 'decode (<charset-header>, $body)'.
- # utf8::decode ($body); # Pack multi-byte UTF-8 back into wide chars.
-
- $ct = guess_content_type ($ct, $body);
- if ($ct eq 'html') {
- print STDERR "$progname: converting HTML...\n" if ($verbose > 2);
- $body = reformat_html ($body, 0);
- } elsif ($ct eq 'rss') {
- $body = reformat_rss ($body);
- } else {
- print STDERR "$progname: plain text...\n" if ($verbose > 2);
- $body = reformat_text ($body);
- }
- print STDOUT $body;
-}
-
-
-
-sub error($) {
- my ($err) = @_;
- print STDERR "$progname: $err\n";
- exit 1;
-}
-
-sub usage() {
- print STDERR "usage: $progname [ --options ... ]\n" .
- ("\n" .
- " Prints out some text for use by various screensavers,\n" .
- " according to the options in the ~/.xscreensaver file.\n" .
- " This may dump the contents of a file, run a program,\n" .
- " or load a URL.\n".
- "\n" .
- " Options:\n" .
- "\n" .
- " --date Print the host name and current time.\n" .
- "\n" .
- " --text STRING Print out the given text. It may contain %\n" .
- " escape sequences as per strftime(2).\n" .
- "\n" .
- " --file PATH Print the contents of the given file.\n" .
- " If --cols is specified, re-wrap the lines;\n" .
- " otherwise, print them as-is.\n" .
- "\n" .
- " --program CMD Run the given program and print its output.\n" .
- " If --cols is specified, re-wrap the output.\n" .
- "\n" .
- " --url HTTP-URL Download and print the contents of the HTTP\n" .
- " document. If it contains HTML, RSS, or Atom,\n" .
- " it will be converted to plain-text.\n" .
- "\n" .
- " --cols N Wrap lines at this column. Default 72.\n" .
- "\n" .
- " --lines N No more than N lines of output.\n" .
- "\n" .
- " --latin1 Emit Latin1 instead of UTF-8.\n" .
- "\n");
- exit 1;
-}
-
-sub main() {
-
- my $load_p = 1;
- my $cocoa_id = undef;
-
- while ($#ARGV >= 0) {
- $_ = shift @ARGV;
- if ($_ eq "--verbose") { $verbose++; }
- elsif (m/^-v+$/) { $verbose += length($_)-1; }
- elsif (m/^--?date$/) { $text_mode = 'date';
- $load_p = 0; }
- elsif (m/^--?text$/) { $text_mode = 'literal';
- $text_literal = shift @ARGV || '';
- $text_literal =~ s@\\n@\n@gs;
- $text_literal =~ s@\\\n@\n@gs;
- $load_p = 0; }
- elsif (m/^--?file$/) { $text_mode = 'file';
- $text_file = shift @ARGV || '';
- $load_p = 0; }
- elsif (m/^--?program$/) { $text_mode = 'program';
- $text_program = shift @ARGV || '';
- $load_p = 0; }
- elsif (m/^--?url$/) { $text_mode = 'url';
- $text_url = shift @ARGV || '';
- $load_p = 0; }
- elsif (m/^--?col(umn)?s?$/) { $wrap_columns = 0 + shift @ARGV; }
- elsif (m/^--?lines?$/) { $truncate_lines = 0 + shift @ARGV; }
- elsif (m/^--?cocoa$/) { $cocoa_id = shift @ARGV; }
- elsif (m/^--?latin1$/) { $latin1_p++; }
- elsif (m/^--?nyarlathotep$/) { $nyarlathotep_p++; }
- elsif (m/^-./) { usage; }
- else { usage; }
- }
-
- if ($load_p) {
-
- if (!defined ($cocoa_id)) {
- # see OSX/XScreenSaverView.m
- $cocoa_id = $ENV{XSCREENSAVER_CLASSPATH};
- }
-
- if (defined ($cocoa_id)) {
- get_cocoa_prefs($cocoa_id);
- } else {
- get_x11_prefs();
- }
- }
-
- output();
-
-
- if (defined ($cocoa_id)) {
- #
- # On MacOS, sleep for 10 seconds between when the last output is
- # printed, and when this process exits. This is because MacOS
- # 10.5.0 and later broke ptys in a new and exciting way: basically,
- # once the process at the end of the pty exits, you have exactly
- # 1 second to read all the queued data off the pipe before it is
- # summarily flushed.
- #
- # Many of the screen savers were written to depend on being able
- # to read a small number of bytes, and continue reading until they
- # reached EOF. This is no longer possible.
- #
- # Note that the current MacOS behavior has all four of these
- # awesome properties: 1) Inconvenient; 2) Has no sane workaround;
- # 3) Different behavior than MacOS 10.1 through 10.4; and 4)
- # Different behavior than every other Unix in the world.
- #
- # See http://jwz.org/b/DHke, and for those of you inside Apple,
- # "Problem ID 5606018".
- #
- # One workaround would be to rewrite the savers to have an
- # internal buffer, and always read as much data as possible as
- # soon as a pipe has input available. However, that's a lot more
- # work, so instead, let's just not exit right away, and hope that
- # 10 seconds is enough.
- #
- # This will solve the problem for invocations of xscreensaver-text
- # that produce little output (e.g., date-mode); and won't solve it
- # in cases where a large amount of text is generated in a short
- # amount of time (e.g., url-mode.)
- #
- sleep (10);
- }
-}
-
-main();
-exit 0;
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-03-10 10:11:24 +0100