Refactor, add SystemD Journaling
This commit is contained in:
parent
a08cfa4d96
commit
c607015ade
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@ -1,29 +1,32 @@
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#!/usr/bin/env perl
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# TODO: configure systemD logging
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# TODO: refactor sloppy use of global variables
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# TODO: clean up debugging output
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# TODO: add option to allow recursive sub-directories (in choose_image())
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# TODO: license, etc.
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use strict;
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use warnings;
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use POSIX;
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use File::Copy;
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use lib "$ENV{HOME}/perl5/lib/perl5";
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$ENV{PWD} = '/tmp' unless (defined($ENV{PWD}));
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use constant ERROR => {
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LOG_EMERG => 8,
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LOG_ALERT => 7,
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LOG_CRIT => 6,
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LOG_ERR => 5,
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LOG_WARNING => 4,
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LOG_NOTICE => 3,
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LOG_INFO => 2,
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LOG_DEBUG => 1
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};
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our $debug = 1; # For testing, will output configuration and errors if true
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our %settings;
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our @e;
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our $pidfile = "/tmp/$ENV{USER}-wallpaper.pid";
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use AnyEvent::Sway;
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our $s = AnyEvent::Sway->new();
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our $o = $s->get_outputs->recv();
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die "No outputs detected.\n" unless (scalar(@$o));
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sub usage()
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{
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my $self = shift;
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print("$0 [output(s)] [-d|--daemon]\n
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Sets a wallpaper by cropping an appropriate sized section of a larger image.\n
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All arguments other than the below are assumed to be output names, as defined
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@ -36,6 +39,9 @@ are currently enabled will be set.\n
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each rotation, if provided (default: 300).\n
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--nocrop Don't crop a selection from the image. Instead, pass the whole
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-n image to swaybg and let it handle the scaling\n
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--verbose=N Define minimum log level. Counting from 1: LOG_DEBUG, LOG_INFO,
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-v N LOG_NOTICE, LOG_WARNING, LOG_ERR, LOG_CRIT, LOG_ALERT, LOG_EMERG
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Default: 5; If provided without a value for N then all (1).
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--help This menu
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-h\n
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You can send SIGUSR1 to force the daemon to reload immediately. Rotation timer
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@ -43,45 +49,136 @@ will be reset.\n");
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exit(0);
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}
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sub new
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{
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my ($class, %args) = @_;
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use AnyEvent::Sway;
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$args{ipc} = AnyEvent::Sway->new();
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use Image::Magick;
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$args{im} = Image::Magick->new();
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$args{error} = ();
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$args{pidfile} = "/tmp/$ENV{USER}-wallpaper.pid";
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return bless { %args };
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}
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my $wp = new("Wallpapers");
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if (-e $wp->{pidfile}) {
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if (-r $wp->{pidfile}) {
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if (open(my $fh, '<', $wp->{pidfile})) {
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my $pid = <$fh>;
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chomp($pid);
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use Proc::ProcessTable;
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my $pt = Proc::ProcessTable->new();
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foreach my $p ( @{ $pt->table() } ) {
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if ($p->{pid} eq $pid) {
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my $name = $0;
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$name =~ s/$ENV{PWD}//;
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if ($p->{'cmndline'} =~ m#$name#) {
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$wp->do_log("LOG_CRIT", "Another process is already running with PID: $pid (running and listed in $wp->{pidfile})");
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# Die locally because do_log will remove pidfile that this iteration does not belong to
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exit(1);
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} else {
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$wp->do_log("LOG_CRIT", "Found matching $pid with different cmdline: $p->{cmndline} (not $0)",1);
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# PID in pidfile doesn't look like it is another wallpaper
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unlink($wp->{pidfile});
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last;
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}
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return $p->{'pid'};
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}
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}
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} else {
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$wp->do_log("LOG_CRIT", "Pidfile $wp->{pidfile} exists, but cannot be opened. Assuming it is running already.");
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# Die locally because do_log will remove pidfile that this iteration does not belong to
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exit(1);
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}
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} else {
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$wp->do_log("LOG_CRIT", "Pidfile $wp->{pidfile} exists, but is not readable. Assuming it is running already.");
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# Die locally because do_log will remove pidfile that this iteration does not belong to
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exit(1);
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}
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}
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# SIGUSR reset the timer, force immediate reload, continue looping
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$SIG{USR1} = sub {
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alarm 0;
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run(%settings);
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$wp->do_log("LOG_INFO", "Reloading due to SIGUSR1");
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};
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# SIGTERM reset the timer, clean pid, and allow for the main loop to finish run
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$SIG{TERM} = sub {
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alarm 0;
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clean();
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$settings{daemon} = 0;
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$wp->do_log("LOG_INFO", "Going down clean due to SIGTERM");
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clean($wp);
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$wp->{daemon} = 0;
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};
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# SIGKILL clean pid then exit immediately
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$SIG{KILL} = sub {
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clean();
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$wp->do_log("LOG_INFO", "Hard kill with SIGKILL, attempting to remove pidfile");
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clean($wp);
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exit(0);
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};
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# simply returns the array of hashes provided by swaymsg
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sub get_outputs
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{
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my $self = shift;
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my $o = $self->{ipc}->get_outputs->recv() || $self->do_log('LOG_WARNING',"Failed to query 'get_outputs'");
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die "No outputs detected.\n" unless (scalar(@$o) > 0);
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return $o;
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}
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# returns the same as above but with the 'name' as a hash key for easier lookup
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sub get_active
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{
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my $self = shift;
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if (defined($self->{outputs}) && scalar($self->{outputs})) {
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my %active = ();
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foreach my $o (@{$self->{outputs}}) {
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my $name;
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my %details;
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next unless ($o->{active});
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$active{$o->{name}} = ();
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foreach (keys(%$o)) {
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$active{$o->{name}}->{$_} = $o->{$_} unless ($_ eq 'name');
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}
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}
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$self->do_log('LOG_WARNING',"No outputs detected.") unless (scalar(keys(%active)));
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return \%active;
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} else {
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print "You haven't initialized get_outputs";
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$self->do_log('LOG_WARNING',"Output list not defined yet. Try 'get_outputs()' first");
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return \{};
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}
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}
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sub clean
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{
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if (-e $pidfile) {
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open (my $fh, '<', $pidfile);
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my $self = shift;
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if (-e $self->{pidfile}) {
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open (my $fh, '<', $self->{pidfile});
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my $p = <$fh>;
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close($fh);
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chomp $p;
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kill($p);
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unlink($pidfile);
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unlink($self->{pidfile});
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}
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}
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sub choose_image
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{
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my @w = glob("$settings{path}/*");
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my $self = shift;
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my @w = glob($self->{'path'}."/*");
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return undef unless (scalar(@w));
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$self->do_log("LOG_DEBUG", "Found ".scalar(@w)." files in $self->{path}");
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my @i;
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foreach (@w) {
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if (-d "$settings{path}/$_") {
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if (-d $_) {
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$self->do_log("LOG_DEBUG", "Ignoring sub-directory $_");
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next;
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}
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if ($_ =~ m/\.(png|jpg)$/) {
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@ -92,24 +189,9 @@ sub choose_image
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return $i[rand(scalar(@i))] || return undef;
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}
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sub get_size
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{
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my $target = shift;
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foreach my $output (@$o) {
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if ($output->{'name'} eq $target) {
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return (
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#$output->{'current_mode'}->{'width'},
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#$output->{'current_mode'}->{'height'}
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$output->{'rect'}->{'width'},
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$output->{'rect'}->{'height'}
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);
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}
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}
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return undef;
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}
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sub crop
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{
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my $self = shift;
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my $image = shift;
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my $ow = shift;
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my $oh = shift;
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@ -117,25 +199,21 @@ sub crop
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my $cropped = $image;
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$cropped =~ s#^.*/([^/]*)\.([^\.]+)$#$1-cropped.$2#;
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#$image = "/tmp/Pharma-out.png.jpg";
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use Image::Magick;
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my $im = Image::Magick->new();
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$im->Read($image);
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die "$image is not readable" unless (-r $image);
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my $ret = $im->Read($image);
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return 0 if ($ret);
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my ($iw, $ih) = $im->Get("columns", "rows");
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$self->do_log("LOG_DEBUG", "Image has dimensions ${iw}x${ih}");
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# Return full size if it is smaller in either dimension then the output
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if ($iw <= $ow || $ih <= $oh) {
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print "Not cropping $image because it is too small\n";
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$cropped =~ s#-cropped\.([^\.]+)$#\.$1#;
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use File::Copy;
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File::Copy::copy($image,$cropped);
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return $cropped if (-e $cropped);
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$self->do_log("LOG_DEBUG", "Not cropping because ${iw}x${ih} is smaller or equal to the output (${ow}x${oh}) in at least 1 dimension.");
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return undef;
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}
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print "Image size: $iw $ih\n";
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print "output size: $ow $oh\n";
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my ($x, $y);
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$x = int(rand($iw-$ow));
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$y = int(rand($ih-$oh));
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@ -149,75 +227,118 @@ sub crop
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return $cropped if ( -e $cropped );
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}
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sub get_active
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{
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my @targets;
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foreach (@$o) {
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push (@targets, $_->{name});
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}
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return @targets;
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}
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sub set_background
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{
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my $self = shift;
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my $target = shift || return "No target or image provided";
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my $cropped = shift || return "No image provided";
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# TODO get fallback from javascript
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my $cmd = "output $target background $cropped fill #000000";
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print "Running $cmd\n";
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my $ret = $s->message(0,$cmd)->recv;
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$self->do_log("LOG_DEBUG", "Running $cmd\n");
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my $ret = $self->{ipc}->message(0,$cmd)->recv;
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if ($ret->[0]->{success}) {
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print "Success!\n";
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$self->do_log("LOG_DEBUG", "Success!");
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return undef;
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}
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return "Failed to run Sway IPC command '$cmd'";
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}
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sub run
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sub do_log
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{
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my @err;
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# Local copy of targets so that it will re-check active every time
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my @t = $settings{targets} if (defined($settings{targets}));
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unless (scalar(@t)) {
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@t = get_active();
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push(@err, "No target outputs") unless (scalar(@t));
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}
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foreach my $a (@t) {
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my $image = choose_image($settings{path});
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if (defined($image)) {
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if ( -r "$image" ) {
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print "selected $image\n";
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my $cropped;
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if ($settings{crop}) {
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if ($settings{debug}) {
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print "Cropping image for '$a' using '$image'\n";
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}
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my ($ow, $oh) = get_size($a);
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$cropped = crop($image, $ow, $oh);
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unless ($cropped) {
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push(@err, "Failed to generate cropped image") unless ($cropped);
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next;
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}
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} else {
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$cropped = $image;
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}
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my $e = set_background($a,$cropped);
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push(@err, $e) if (defined($e));
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if ($settings{crop}) {
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print "Deleting $cropped\n";
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#unlink($cropped) || push(@err, "Failed to delete $cropped after setting: $!");
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}
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} else {
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push(@err, "$a: Unable to read image $image");
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}
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} else {
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push(@err, "$a: Unable to select image from $settings{path}");
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my $self = shift;
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my $level = shift;
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my $msg = shift;
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my $die = shift || 0;
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my $min = $self->{verbose} || 5;
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if ($self->{daemon}) {
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use Log::Journald qw(send);
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send(
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PRIORITY => ERROR->{$level},
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MESSAGE => $msg,
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PERL_PACKAGE => 'Sway Wallpapers'
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) || warn "Could not send log ($level $msg): $!";
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if ($die) {
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$msg = '(FATAL) ' . $msg;
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exit(1);
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}
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} else {
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if (ERROR->{$level} >= $min) {
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printf("%11s %s\n", $level, $msg);
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}
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}
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if ($settings{debug} && $settings{daemon}) {
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print STDERR join("\n",@err);
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} else {
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@e = @err;
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if ($die) {
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$self->clean();
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exit(1);
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}
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}
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sub run
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{
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my $self = shift;
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$self->do_log("LOG_DEBUG", "Fetching outputs from IPC");
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$self->{outputs} = $self->get_outputs();
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# Local copy of targets so that it will re-check active every time
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my @t = @{$self->{targets}} if (scalar(@{$self->{targets}}));
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$self->do_log("LOG_DEBUG", "Removing inactive ouputs");
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my $active = $self->get_active();
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# If specific targets were not defined, use all active
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unless (scalar(@t)) {
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@t = keys(%$active);
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push(@{$self->{error}}, "No target outputs") unless (scalar(@t));
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}
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$self->do_log("LOG_DEBUG", "Looping desired ouputs");
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foreach my $target (@t) {
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$self->do_log("LOG_DEBUG", "Ensuring that desired output is active");
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unless (defined($active->{$target})) {
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$self->do_log('LOG_DEBUG', "Target $target is not an active output");
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next;
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}
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$self->do_log("LOG_DEBUG", "Selecting image for $target");
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my $image = $self->choose_image();
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if (defined($image)) {
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$self->do_log('LOG_DEBUG', "Selected $image");
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if ( -r "$image" ) {
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my $cropped;
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if ($self->{crop}) {
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$self->do_log('LOG_DEBUG',"Cropping image for '$target' using '$image'");
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$cropped = $self->crop(
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$image,
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$active->{$target}->{rect}->{width},
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$active->{$target}->{rect}->{height}
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);
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if ($cropped) {
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} else {
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# Create a tmp copy since it will be deleted later
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# If PWD is the wallpaper path, make the tmp in /tmp
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if ($self->{path} eq $ENV{PWD}) {
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$cropped = $image;
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$cropped =~ s%$ENV{PWD}%/tmp%;
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# Else make the tmp in PWD
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} else {
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$cropped = '/'.$image;
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$cropped =~ s%.*/([^/+])%$ENV{PWD}/$1%;
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}
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$self->do_log('LOG_DEBUG',"Creating copy of original: $cropped");
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File::Copy::copy($image,$cropped) || $self->do_log('LOG_WARNING',"Failed to copy to $cropped: $!");
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}
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} else {
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$self->do_log('LOG_DEBUG', "Cropping is disabled");
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$cropped = $image;
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}
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$self->set_background($target,$cropped);
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if ($self->{crop}) {
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$self->do_log('LOG_DEBUG', "Deleting $cropped");
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# Give swaybg a second, otherwise the file will be missing before it ends
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sleep(1);
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unlink($cropped) || $self->do_log("LOG_WARNING", "Failed to delete $cropped after setting: $!");
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}
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} else {
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$self->do_log("LOG_WARNING", "Failed to read $image");
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}
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} else {
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$self->do_log("LOG_WARNING", "Failed to select image from $self->{path}");
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}
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}
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}
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@ -229,27 +350,39 @@ my $daemon;
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my $delay;
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my $crop;
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my $path;
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my $verbose;
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while (my $arg = shift(@ARGV)) {
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if ($arg eq '-h' || $arg eq '--help') {
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usage();
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$wp->usage();
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} elsif ($arg =~ m/^\-\-path=?(.+)$/) {
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die "Redundant argument '$arg'. Wallpaper path already set.\n" if ($path);
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$path = $1;
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} elsif ($arg eq '-p') {
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die "Redundant argument '$arg'. Wallpaper path already set.\n" if ($path);
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$path = shift(@ARGV);
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} elsif ($arg =~ m/^\-\-daemon=?(.+)$/) {
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} elsif ($arg =~ m/^\-\-daemon=?(.+)?$/) {
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die "Redundant argument '$arg'. Daemon mode already set.\n" if ($daemon);
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$delay = $1;
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$delay = $1 || 300;
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$daemon = 1;
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} elsif ($arg eq '-d') {
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die "Redundant argument '$arg'. Daemon mode already set.\n" if ($daemon);
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if ($ARGV[0] =~ m/^\d+$/) {
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if (scalar(@ARGV) && $ARGV[0] =~ m/^\d+$/) {
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$delay = shift(@ARGV);
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}
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$daemon = 1;
|
||||
} elsif ($arg eq '--nocrop' || $arg eq '-') {
|
||||
die "Redundant argument '$arg'. No-crop already set.\n" unless ($crop);
|
||||
} elsif ($arg eq '--nocrop' || $arg eq '-n') {
|
||||
die "Redundant argument '$arg'. No-crop already set.\n" if (defined($crop));
|
||||
$crop = 0;
|
||||
} elsif ($arg =~ m/^\-\-verbose=?(.+)?$/) {
|
||||
die "Redundant argument '$arg'. Verbosity already set.\n" if ($verbose);
|
||||
$verbose = $1 || 1;
|
||||
} elsif ($arg eq '-p') {
|
||||
die "Redundant argument '$arg'. Verbosity already set.\n" if ($verbose);
|
||||
if (scalar(@ARGV) && $ARGV[0] =~ m/^\d$/) {
|
||||
$verbose = shift(@ARGV);
|
||||
}
|
||||
} elsif ($arg =~ m/^-/) {
|
||||
die "Unrecognized argument: $arg\n";
|
||||
} else {
|
||||
push(@targets,$arg);
|
||||
}
|
||||
|
|
@ -259,51 +392,41 @@ while (my $arg = shift(@ARGV)) {
|
|||
# Validate arguments
|
||||
################################################################################
|
||||
|
||||
$wp->do_log("LOG_DEBUG", "Validating arguments");
|
||||
die "Invalid rotation delay: $delay" if (defined($delay) && $delay !~ m/^\d+$/);
|
||||
|
||||
die "Invalid wallpaper path '$path'. Not a directory." if (defined($path) && !-d $path);
|
||||
die "Invalid verbosity level: '$verbose'\n" if (defined($verbose) && $verbose =~ m/^[1-8]$/);
|
||||
|
||||
if (scalar(@targets)) {
|
||||
my @kept;
|
||||
foreach my $t (@targets) {
|
||||
my $hit = 0;
|
||||
foreach (@$o) {
|
||||
if ($_->{name} eq $t) {
|
||||
push(@kept, $t);
|
||||
$hit++;
|
||||
last;
|
||||
}
|
||||
}
|
||||
print STDERR "Requested output '$t' not found\n" unless ($hit);
|
||||
}
|
||||
die "None of the requested outputs are active" unless (scalar(@kept));
|
||||
@targets = @kept;
|
||||
}
|
||||
|
||||
$settings{targets} = @targets || undef;
|
||||
$settings{daemon} = $daemon || 0;
|
||||
$settings{path} = $path || "$ENV{HOME}/wallpapers";
|
||||
$settings{crop} = $crop || 1;
|
||||
$settings{delay} = $delay || 300;
|
||||
$settings{debug} = $debug || 0;
|
||||
$wp->do_log("LOG_DEBUG", "Configuring object");
|
||||
$wp->{targets} = \@targets || undef;
|
||||
$wp->{daemon} = $daemon || 0;
|
||||
$wp->{path} = $path || "$ENV{HOME}/wallpapers";
|
||||
$wp->{crop} = $crop || 1;
|
||||
$wp->{delay} = $delay || 300;
|
||||
$wp->{verbose} = $verbose || 0;
|
||||
$wp->{error} = [];
|
||||
|
||||
################################################################################
|
||||
# For if daemonized
|
||||
# Fork if daemonized
|
||||
################################################################################
|
||||
|
||||
if ($settings{daemon}) {
|
||||
if ($wp->{daemon}) {
|
||||
$wp->do_log("LOG_DEBUG", "Forking daemon");
|
||||
my $p = fork();
|
||||
if ($p) {
|
||||
if (open(my $fh, ">", $pidfile)) {
|
||||
print $fh "$p" || die "Failed to write pid ($p) to pidfile $pidfile";
|
||||
$wp->do_log("LOG_DEBUG", "Writing PID ($p) to pidfile ($wp->{pidfile})");
|
||||
if (open(my $fh, ">", $wp->{pidfile})) {
|
||||
print $fh "$p" || die "Failed to write pid ($p) to pidfile ".$wp->{pidfile};
|
||||
close($fh);
|
||||
} else {
|
||||
print "Failed to open pidfile: $pidfile: $!\n";
|
||||
print "Failed to open pidfile ".$wp->{pidfile}.": $!\n";
|
||||
}
|
||||
# Short delay necessary for SystemD to find PID
|
||||
sleep(1);
|
||||
exit(0);
|
||||
}
|
||||
#setpgrp;
|
||||
#setsid;
|
||||
$wp->do_log("LOG_DEBUG", "Daemon running");
|
||||
setpgrp(0, 0);
|
||||
umask 0;
|
||||
}
|
||||
|
||||
|
|
@ -311,31 +434,24 @@ if ($settings{daemon}) {
|
|||
# Main
|
||||
################################################################################
|
||||
|
||||
my $first = 1;
|
||||
do {
|
||||
run(%settings);
|
||||
if ($settings{daemon}) {
|
||||
$wp->do_log("LOG_INFO", "Reloading wallpaper") unless ($first);
|
||||
$wp->run();
|
||||
if ($wp->{daemon}) {
|
||||
my $normal = "reload wallpaper";
|
||||
eval {
|
||||
$SIG{ALRM} = sub { print "$normal\n" };
|
||||
alarm $settings{delay};
|
||||
$SIG{ALRM} = sub { return "$normal" };
|
||||
alarm $wp->{delay};
|
||||
POSIX::pause();
|
||||
alarm 0;
|
||||
};
|
||||
if ($@ && $@ !~ quotemeta($normal)) {
|
||||
if ($settings{debug}) {
|
||||
print $normal;
|
||||
}
|
||||
}
|
||||
$wp->do_log("LOG_WARNING", "Reload failed: $@") if ($@ && $@ !~ quotemeta($normal));
|
||||
}
|
||||
} while ($settings{daemon});
|
||||
$first = 0 if ($first);
|
||||
} while ($wp->{daemon});
|
||||
|
||||
################################################################################
|
||||
# If we made it to here, it was not daemonized. Output errors and exit
|
||||
################################################################################
|
||||
|
||||
if (scalar(@e)) {
|
||||
die "Failure while not running as daemon:\n" .
|
||||
join("\n",@e);
|
||||
}
|
||||
$wp->do_log("LOG_DEBUG", "Finishing") unless ($wp->{daemon});
|
||||
|
||||
exit(0);
|
||||
|
|
|
|||
Loading…
Reference in New Issue