use PVE::Tools;
use Cwd qw();
+use Socket qw(PF_INET PF_INET6 SOCK_DGRAM IPPROTO_IP);
+
+use constant IFF_UP => 1;
+use constant IFNAMSIZ => 16;
+use constant SIOCGIFFLAGS => 0x8913;
+
my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK);
my $cpuinfo;
}
sub read_proc_mounts {
- return PVE::Tools::file_get_contents("/proc/mounts");
+ return PVE::Tools::file_get_contents("/proc/mounts", 128*1024);
}
# mounts encode spaces (\040), tabs (\011), newlines (\012), backslashes (\\ or \134)
$mountpoint = Cwd::realpath($mountpoint);
+ return 0 if !defined($mountpoint); # path does not exist
+
my $mounts = parse_proc_mounts();
return (grep { $_->[1] eq $mountpoint } @$mounts) ? 1 : 0;
}
}
}
+# struct ifreq { // FOR SIOCGIFFLAGS:
+# char ifrn_name[IFNAMSIZ]
+# short ifru_flags
+# };
+my $STRUCT_IFREQ_SIOCGIFFLAGS = 'Z' . IFNAMSIZ . 's1';
+sub get_active_network_interfaces {
+ # Use the interface name list from /proc/net/dev
+ open my $fh, '<', '/proc/net/dev'
+ or die "failed to open /proc/net/dev: $!\n";
+ # And filter by IFF_UP flag fetched via a PF_INET6 socket ioctl:
+ my $sock;
+ socket($sock, PF_INET6, SOCK_DGRAM, &IPPROTO_IP)
+ or socket($sock, PF_INET, SOCK_DGRAM, &IPPROTO_IP)
+ or return [];
+
+ my $ifaces = [];
+ while(defined(my $line = <$fh>)) {
+ next if $line !~ /^\s*([^:\s]+):/;
+ my $ifname = $1;
+ my $ifreq = pack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifname, 0);
+ if (!defined(ioctl($sock, SIOCGIFFLAGS, $ifreq))) {
+ warn "failed to get interface flags for: $ifname\n";
+ next;
+ }
+ my ($name, $flags) = unpack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifreq);
+ push @$ifaces, $ifname if ($flags & IFF_UP);
+ }
+ close $fh;
+ close $sock;
+ return $ifaces;
+}
+
1;