package detect_devices; use diagnostics; use strict; use log; use common qw(:common :file); use devices; use c; my @netdevices = map { my $l = $_; map { "$l$_" } (0..3) } qw(eth tr plip fddi); my $scsiDeviceAvailable; my $CSADeviceAvailable; 1; sub get { # Detect the default BIOS boot harddrive is kind of tricky. We may have IDE, # SCSI and RAID devices on the same machine. From what I see so far, the default # BIOS boot harddrive will be # 1. The first IDE device if IDE exists. Or # 2. The first SCSI device if SCSI exists. Or # 3. The first RAID device if RAID exists. map { &{$_->[0]}() ? &{$_->[1]}() : () } [ \&hasIDE, \&getIDE ], [ \&hasSCSI, \&getSCSI ], [ \&hasDAC960, \&getDAC960 ], [ \&hasCompaqSmartArray, \&getCompaqSmartArray ]; } sub hds() { grep { $_->{type} eq 'hd' } get(); } sub cdroms() { grep { $_->{type} eq 'cdrom' } get(); } sub floppies() { (grep { tryOpen($_) } qw(fd0 fd1)), (grep { $_->{type} eq 'fd' } get()); } sub hasSCSI() { defined $scsiDeviceAvailable and return $scsiDeviceAvailable; local *F; open F, "/proc/scsi/scsi" or log::l("failed to open /proc/scsi/scsi: $!"), return 0; foreach (<F>) { /devices: none/ and log::l("no scsi devices are available"), return $scsiDeviceAvailable = 0; } log::l("scsi devices are available"); $scsiDeviceAvailable = 1; } sub hasIDE() { -e "/proc/ide" } sub hasDAC960() { 1 } sub hasCompaqSmartArray() { defined $CSADeviceAvailable and return $CSADeviceAvailable; -r "/proc/array/ida0" or log::l("failed to open /proc/array/ida0: $!"), return $CSADeviceAvailable = 0; log::l("Compaq Smart Array controllers available"); $CSADeviceAvailable = 1; } sub getSCSI() { my @drives; my ($driveNum, $cdromNum, $tapeNum) = qw(0 0 0); my $err = sub { chop; die "unexpected line in /proc/scsi/scsi: $_"; }; local $_; local *F; open F, "/proc/scsi/scsi" or die "failed to open /proc/scsi/scsi"; local $_ = <F>; /^Attached devices:/ or return &$err(); while ($_ = <F>) { my ($id) = /^Host:.*?Id: (\d+)/ or return &$err(); $_ = <F>; my ($vendor, $model) = /^\s*Vendor:\s*(.*?)\s+Model:\s*(.*?)\s+Rev:/ or return &$err(); $_ = <F>; my ($type) = /^\s*Type:\s*(.*)/ or &$err(); my $device; if ($type =~ /Direct-Access/) { $type = 'hd'; $device = "sd" . chr($driveNum++ + ord('a')); } elsif ($type =~ /Sequential-Access/) { $type = 'tape'; $device = "st" . $tapeNum++; } elsif ($type =~ /CD-ROM/) { $type = 'cdrom'; $device = "scd" . $cdromNum++; } $device and push @drives, { device => $device, type => $type, info => "$vendor $model", id => $id, bus => 0 }; } @drives; } sub getIDE() { my @idi; # Great. 2.2 kernel, things are much easier and less error prone. foreach my $d (glob_('/proc/ide/hd*')) { my ($t) = chop_(cat_("$d/media")); my $type = $ {{disk => 'hd', cdrom => 'cdrom', tape => 'tape', floppy => 'fd'}}{$t} or next; my ($info) = chop_(cat_("$d/model")); $info ||= "(none)"; my $num = ord (($d =~ /(.)$/)[0]) - ord 'a'; push @idi, { type => $type, device => basename($d), info => $info, bus => $num/2, id => $num%2 }; } @idi; } sub getCompaqSmartArray() { my @idi; my $f; for (my $i = 0; -r ($f = "/proc/array/ida$i"); $i++) { foreach (cat_($f)) { if (m|^(ida/.*?):|) { push @idi, { device => $1, info => "Compaq RAID logical disk", type => 'hd' }; last; } } } @idi; } sub getDAC960() { my @idi; # We are looking for lines of this format:DAC960#0: # /dev/rd/c0d0: RAID-7, Online, 17928192 blocks, Write Thru0123456790123456789012 foreach (syslog()) { my ($devicename, $info) = m|/dev/rd/(.*?): (.*?),| or next; push @idi, { info => $info, type => 'hd', devicename => $devicename }; log::l("DAC960: $devicename: $info"); } @idi; } sub net2module { my @modules = map { quotemeta first(split) } cat_("/proc/modules"); my $modules = join '|', @modules; my $net = join '|', @netdevices; my ($module, %l); foreach (syslog()) { if (/^($modules)\.c:/) { $module = $1; } elsif (/^($net):/) { $l{$1} = $module if $module; } } %l; } sub getNet() { grep { hasNetDevice($_) } @netdevices; } sub getPlip() { foreach (0..2) { hasNetDevice("plip$_") and log::l("plip$_ will be used for PLIP"), return "plip$_"; } undef; } sub hasNet() { goto &getNet } sub hasPlip() { goto &getPlip } sub hasEthernet() { hasNetDevice("eth0"); } sub hasTokenRing() { hasNetDevice("tr0"); } sub hasNetDevice($) { c::hasNetDevice($_[0]) } sub tryOpen($) { local *F; sysopen F, devices::make($_[0]), c::O_NONBLOCK(); } sub syslog { my $file = "/var/log/dmesg"; -r $file or $file = "/tmp/syslog"; cat_($file); `dmesg`; }