use URI::Escape;
use Encode;
use Digest::SHA;
+use JSON;
use Text::ParseWords;
use String::ShellQuote;
use Time::HiRes qw(usleep gettimeofday tv_interval alarm);
return $exitcode;
}
+# Run a command with a tcp socket as standard input.
+sub pipe_socket_to_command {
+ my ($cmd, $ip, $port) = @_;
+
+ my $params = {
+ Listen => 1,
+ ReuseAddr => 1,
+ Proto => &Socket::IPPROTO_TCP,
+ GetAddrInfoFlags => 0,
+ LocalAddr => $ip,
+ LocalPort => $port,
+ };
+ my $socket = IO::Socket::IP->new(%$params) or die "failed to open socket: $!\n";
+
+ print "$ip\n$port\n"; # tell remote where to connect
+ *STDOUT->flush();
+
+ alarm 0;
+ local $SIG{ALRM} = sub { die "timed out waiting for client\n" };
+ alarm 30;
+ my $client = $socket->accept; # Wait for a client
+ alarm 0;
+ close($socket);
+
+ # We want that the command talks over the TCP socket and takes
+ # ownership of it, so that when it closes it the connection is
+ # terminated, so we need to be able to close the socket. So we
+ # can't really use PVE::Tools::run_command().
+ my $pid = fork() // die "fork failed: $!\n";
+ if (!$pid) {
+ POSIX::dup2(fileno($client), 0);
+ POSIX::dup2(fileno($client), 1);
+ close($client);
+ exec {$cmd->[0]} @$cmd or do {
+ warn "exec failed: $!\n";
+ POSIX::_exit(1);
+ };
+ }
+
+ close($client);
+ if (waitpid($pid, 0) != $pid) {
+ kill(15 => $pid); # if we got interrupted terminate the child
+ my $count = 0;
+ while (waitpid($pid, POSIX::WNOHANG) != $pid) {
+ usleep(100000);
+ $count++;
+ kill(9 => $pid), last if $count > 300; # 30 second timeout
+ }
+ }
+ if (my $sig = ($? & 127)) {
+ die "got signal $sig\n";
+ } elsif (my $exitcode = ($? >> 8)) {
+ die "exit code $exitcode\n";
+ }
+
+ return undef;
+}
+
sub split_list {
my $listtxt = shift || '';
my $starttime = [gettimeofday];
my $elapsed;
+ my $found;
while (($elapsed = tv_interval($starttime)) < $timeout) {
- if (my $fh = IO::File->new ("/proc/net/tcp", "r")) {
- while (defined (my $line = <$fh>)) {
- if ($line =~ m/^\s*\d+:\s+([0-9A-Fa-f]{8}):([0-9A-Fa-f]{4})\s/) {
- if ($port == hex($2)) {
- close($fh);
- return 1;
- }
- }
+ # -Htln = don't print header, tcp, listening sockets only, numeric ports
+ run_command(['/bin/ss', '-Htln', "sport = :$port"], outfunc => sub {
+ my $line = shift;
+ if ($line =~ m/^LISTEN\s+\d+\s+\d+\s+\S+:(\d+)\s/) {
+ $found = 1 if ($port == $1);
}
- close($fh);
- }
+ });
+ return 1 if $found;
$sleeptime += 100000 if $sleeptime < 1000000;
usleep($sleeptime);
}
return next_unused_port(61000, 61099, $family, $address);
}
+# sigkill after $timeout a $sub running in a fork if it can't write a pipe
+# the $sub has to return a single scalar
+sub run_fork_with_timeout {
+ my ($timeout, $sub) = @_;
+
+ my $res;
+ my $error;
+ my $pipe_out = IO::Pipe->new();
+
+ # disable pending alarms, save their remaining time
+ my $prev_alarm = alarm 0;
+
+ # avoid leaving a zombie if the parent gets interrupted
+ my $sig_received;
+ local $SIG{INT} = sub { $sig_received++; };
+
+ my $child = fork();
+ if (!defined($child)) {
+ die "fork failed: $!\n";
+ return $res;
+ }
+
+ if (!$child) {
+ $pipe_out->writer();
+
+ eval {
+ $res = $sub->();
+ print {$pipe_out} encode_json({ result => $res });
+ $pipe_out->flush();
+ };
+ if (my $err = $@) {
+ print {$pipe_out} encode_json({ error => $err });
+ $pipe_out->flush();
+ POSIX::_exit(1);
+ }
+ POSIX::_exit(0);
+ }
+
+ $pipe_out->reader();
+
+ my $readvalues = sub {
+ local $/ = undef;
+ my $child_res = decode_json(scalar<$pipe_out>);
+ $res = $child_res->{result};
+ $error = $child_res->{error};
+ };
+ eval {
+ run_with_timeout($timeout, $readvalues);
+ };
+ warn $@ if $@;
+ $pipe_out->close();
+ kill('KILL', $child);
+ waitpid($child, 0);
+
+ alarm $prev_alarm;
+ die "interrupted by unexpected signal\n" if $sig_received;
+
+ die $error if $error;
+ return $res;
+}
+
# NOTE: NFS syscall can't be interrupted, so alarm does
# not work to provide timeouts.
# from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation"
return crypt(encode("utf8", $pw), "\$5\$$salt\$");
}
+# intended usage: convert_size($val, "kb" => "gb")
+# on reduction (converting to a bigger unit) we round up by default if
+# information got lost. E.g. `convert_size(1023, "b" => "kb")` returns 1
+# use $no_round_up to switch this off, above example would then return 0
+sub convert_size {
+ my ($value, $from, $to, $no_round_up) = @_;
+
+ my $units = {
+ b => 0,
+ kb => 1,
+ mb => 2,
+ gb => 3,
+ tb => 4,
+ pb => 5,
+ };
+
+ $from = lc($from); $to = lc($to);
+ die "unknown 'from' and/or 'to' units ($from => $to)"
+ if !(defined($units->{$from}) && defined($units->{$to}));
+
+ my $shift_amount = $units->{$from} - $units->{$to};
+
+ if ($shift_amount > 0) {
+ $value <<= ($shift_amount * 10);
+ } elsif ($shift_amount < 0) {
+ my $remainder = ($value & (1 << abs($shift_amount)*10) - 1);
+ $value >>= abs($shift_amount) * 10;
+ $value++ if $remainder && !$no_round_up;
+ }
+
+ return $value;
+}
+
1;
projects / pve-common.git / blobdiff