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compiler_vm: refactor some things related to vm-exec
This commit is contained in:
Pragmatic Software
parent
1326b0ac5f
commit
d609206be8
@ -28,9 +28,10 @@ sub accept_client() {
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print STDERR "VSOCK accepted new connection.\n";
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my $buffer = '';
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my $command;
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while (1) {
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my $command = Guest::read_input(*STDIN, \$buffer, 'VSOCK');
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$command = Guest::read_input(*STDIN, \$buffer, 'VSOCK');
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if (not defined $command) {
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# recoverable error or waiting for more input
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@ -93,19 +93,22 @@ sub process_command($command, $mod, $user, $tag) {
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system("cp -R -p \"/root/factdata/$command->{'persist-key'}\" \"/home/$user/$command->{'persist-key'}\" 1>&2");
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}
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system("chmod -R 755 /home/$user 1>&2");
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system("chown -R $user /home/$user 1>&2");
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system("chgrp -R $user /home/$user 1>&2");
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system("rm -rf /home/$user/prog* 1>&2");
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my $dir = "/home/$user/$$";
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system("mkdir -p $dir 1>&2");
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system("chmod -R 755 $dir 1>&2");
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system("chown -R $user $dir 1>&2");
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system("chgrp -R $user $dir 1>&2");
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system("pkill -u $user 1>&2");
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system("date -s \@$command->{date} 1>&2");
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$ENV{USER} = $user;
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$ENV{USER} = $user;
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$ENV{LOGNAME} = $user;
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$ENV{HOME} = $home;
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$ENV{HOME} = $home;
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chdir("/home/$user");
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chdir("/home/$user/$$");
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$GID = $gid;
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$EGID = "$gid $gid";
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@ -129,6 +132,7 @@ sub process_command($command, $mod, $user, $tag) {
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# kill any left-over processes started by $user
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system("pkill -u $user");
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system("rm -rf /home/$user/$pid");
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return 0;
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}
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}
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@ -11,14 +11,13 @@
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# SPDX-FileCopyrightText: 2021 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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use 5.020;
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use warnings;
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use strict;
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use File::Basename;
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use JSON::XS;
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use FindBin qw($RealBin);
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use lib "$RealBin/../lib";
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use feature qw(signatures);
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no warnings qw(experimental::signatures);
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use constant {
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SERIAL => $ENV{PBOTVM_SERIAL} // 5555,
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@ -26,86 +25,158 @@ use constant {
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VPORT => $ENV{PBOTVM_VPORT} // 5555,
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};
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my $json = join ' ', @ARGV;
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my $data = eval { decode_json $json };
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use File::Basename;
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use JSON::XS;
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use IPC::Open2;
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use IO::Socket;
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if ($@) {
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# wasn't JSON; make structure manually
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if ($json =~ s/^-lang=([^ ]+)\s+//) {
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$data = { lang => $1, code => $json };
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} else {
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$data = { code => $json };
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use FindBin qw($RealBin);
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use lib "$RealBin/../lib";
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sub connect_vsock($context) {
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return undef if not $context->{'vm-cid'};
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print STDERR "Connecting to remote VM socket CID $context->{'vm-cid'} port $context->{'vm-vport'}\n";
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my $command = "socat - VSOCK-CONNECT:$context->{'vm-cid'}:$context->{'vm-vport'}";
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my ($pid, $input, $output) = eval {
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my $pid = open2(my $output, my $input, $command);
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return ($pid, $input, $output);
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};
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if ($@) {
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print STDERR "Failed to connect to VM socket: $@\n";
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return undef;
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}
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if (not defined $pid) {
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print STDERR "Failed to connect to VM socket: $!\n";
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return undef;
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}
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return ($input, $output);
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}
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if (not exists $data->{code}) {
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die "Usage: $0 <code>\n";
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sub connect_serial($context) {
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print STDERR "Connecting to remote VM serial port $context->{'vm-serial'}\n";
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my $vm = IO::Socket::INET->new(
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PeerAddr => '127.0.0.1',
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PeerPort => $context->{'vm-serial'},
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Proto => 'tcp',
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Type => SOCK_STREAM
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);
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# return same $vm handle for ($input, $output)
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return ($vm, $vm);
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}
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# set any missing fields to default values
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$data->{nick} //= 'vm';
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$data->{channel} //= 'vm';
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$data->{lang} //= 'c11';
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$data->{'vm-serial'} //= SERIAL;
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$data->{'vm-cid'} //= CID;
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$data->{'vm-vport'} //= VPORT;
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sub connect_vm($context) {
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my ($input, $output);
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# parse -lang option
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if ($data->{code} =~ s/^-lang=([^ ]+)\s+//) {
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$data->{lang} = $1;
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# attempt preferred VSOCK connection
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($input, $output) = connect_vsock($context);
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# fallback to serial
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if (not defined $input) {
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($input, $output) = connect_serial($context);
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}
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if (not defined $input) {
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die "Could not create connection to VM: $!";
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}
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print STDERR "Connected to VM.\n";
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return ($input, $output);
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}
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my $language = lc $data->{lang};
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sub main() {
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my $args = join ' ', @ARGV;
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eval {
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require "Languages/$language.pm";
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} or do {
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my $found = 0;
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my ($languages, $comma) = ('', '');
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my $context = eval { decode_json $args };
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foreach my $module (sort glob "$RealBin/../lib/Languages/*.pm") {
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$module = basename $module;
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$module =~ s/.pm$//;
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next if $module =~ m/^_/;
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if ($@) {
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# wasn't JSON; make structure manually
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if ($args =~ s/^-lang=([^ ]+)\s+//) {
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$context = { lang => $1, code => $args };
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} else {
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$context = { code => $args };
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}
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}
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require "Languages/$module.pm" or die $!;
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my $mod = "Languages::$module"->new;
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if (not exists $context->{code}) {
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die "Usage: $0 <code>\n";
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}
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if (exists $mod->{name} and $mod->{name} eq $language) {
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$language = $module;
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$found = 1;
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last;
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# set any missing fields to default values
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$context->{nick} //= 'vm';
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$context->{channel} //= 'vm';
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$context->{lang} //= 'c11';
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$context->{'vm-serial'} //= SERIAL;
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$context->{'vm-cid'} //= CID;
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$context->{'vm-vport'} //= VPORT;
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# parse -lang option
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if ($context->{code} =~ s/^-lang=([^ ]+)\s+//) {
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$context->{lang} = $1;
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}
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my $language = lc $context->{lang};
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eval {
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require "Languages/$language.pm";
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} or do {
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my $found = 0;
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my ($languages, $comma) = ('', '');
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foreach my $module (sort glob "$RealBin/../lib/Languages/*.pm") {
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$module = basename $module;
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$module =~ s/.pm$//;
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next if $module =~ m/^_/;
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require "Languages/$module.pm" or die $!;
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my $mod = "Languages::$module"->new;
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if (exists $mod->{name} and $mod->{name} eq $language) {
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$language = $module;
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$found = 1;
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last;
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}
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$module = $mod->{name} if exists $mod->{name};
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$languages .= "$comma$module";
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$comma = ', ';
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}
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$module = $mod->{name} if exists $mod->{name};
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$languages .= "$comma$module";
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$comma = ', ';
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}
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if (not $found) {
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print "Language '$language' is not supported.\nSupported languages are: $languages\n";
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exit;
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}
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};
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if (not $found) {
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print "Language '$language' is not supported.\nSupported languages are: $languages\n";
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if (not length $context->{code}) {
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if (exists $context->{usage}) {
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print "$context->{usage}\n";
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} else {
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print "Usage: cc [-lang=<language>] [-info] [-paste] [-args \"command-line arguments\"] [compiler/language options] <code> [-stdin <stdin input>]\n";
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}
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exit;
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}
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};
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if (not length $data->{code}) {
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if (exists $data->{usage}) {
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print "$data->{usage}\n";
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} else {
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print "Usage: cc [-lang=<language>] [-info] [-paste] [-args \"command-line arguments\"] [compiler/language options] <code> [-stdin <stdin input>]\n";
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}
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exit;
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my $lang = "Languages::$language"->new(%$context);
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$lang->process_interactive_edit;
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$lang->process_standard_options;
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$lang->process_custom_options;
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$lang->process_cmdline_options;
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$lang->preprocess_code;
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($lang->{'vm-input'}, $lang->{'vm-output'}) = connect_vm($context);
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$lang->execute;
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$lang->postprocess_output;
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$lang->show_output;
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}
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my $lang = "Languages::$language"->new(%$data);
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$lang->{local} = $ENV{CC_LOCAL};
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$lang->process_interactive_edit;
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$lang->process_standard_options;
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$lang->process_custom_options;
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$lang->process_cmdline_options;
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$lang->preprocess_code;
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$lang->execute;
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$lang->postprocess_output;
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$lang->show_output;
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main();
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@ -12,8 +12,6 @@ no if $] >= 5.018, warnings => "experimental::smartmatch";
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package Languages::_default;
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use IPC::Open2;
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use IO::Socket;
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use LWP::UserAgent;
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use Time::HiRes qw/gettimeofday/;
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use Text::Balanced qw/extract_delimited/;
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@ -318,73 +316,11 @@ sub paste_0x0 {
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return $result;
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}
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sub connect_vsock {
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my ($self) = @_;
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return undef if not $self->{'vm-cid'};
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print STDERR "Connecting to remote VM socket CID $self->{'vm-cid'} port $self->{'vm-vport'}\n";
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my $command = "socat - VSOCK-CONNECT:$self->{'vm-cid'}:$self->{'vm-vport'}";
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my ($pid, $input, $output) = eval {
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my $pid = open2(my $output, my $input, $command);
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return ($pid, $input, $output);
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};
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if ($@) {
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print STDERR "Failed to connect to VM socket: $@\n";
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return undef;
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}
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if (not defined $pid) {
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print STDERR "Failed to connect to VM socket: $!\n";
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return undef;
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}
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return ($input, $output);
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}
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sub connect_serial {
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my ($self) = @_;
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print STDERR "Connecting to remote VM serial port $self->{'vm-serial'}\n";
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my $vm = IO::Socket::INET->new(
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PeerAddr => '127.0.0.1',
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PeerPort => $self->{'vm-serial'},
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Proto => 'tcp',
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Type => SOCK_STREAM
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);
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# return same $vm handle for ($input, $output)
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return ($vm, $vm);
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}
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sub execute {
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my ($self) = @_;
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my ($input, $output, $pid);
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if (defined $self->{local} and $self->{local} != 0) {
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print "Using local machine instead of virtual machine\n";
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$pid = open2($output, $input, './compiler_vm_server.pl') || die "repl failed: $@\n"; # XXX adapt vm-exec into local-exec
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print "Started fake-vm, pid: $pid\n";
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} else {
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# attempt preferred VSOCK connection
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($input, $output) = $self->connect_vsock();
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# fallback to serial
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if (not defined $input) {
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($input, $output) = $self->connect_serial();
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}
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if (not defined $input) {
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die "Could not create connection to VM: $!";
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}
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print STDERR "Connected to VM.\n";
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}
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my $input = $self->{'vm-input'};
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my $output = $self->{'vm-output'};
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my $date = time;
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my $stdin = $self->{options}->{'-stdin'};
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@ -511,7 +447,6 @@ sub execute {
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}
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close $input;
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waitpid($pid, 0) if defined $pid;
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$self->{output} = $result;
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