diff options
Diffstat (limited to 'perl-install/detect_devices.pm')
| -rw-r--r-- | perl-install/detect_devices.pm | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/perl-install/detect_devices.pm b/perl-install/detect_devices.pm new file mode 100644 index 000000000..8f1fac97d --- /dev/null +++ b/perl-install/detect_devices.pm @@ -0,0 +1,151 @@ +package detect_devices; + +use diagnostics; +use strict; + +use log; +use common qw(:common :file); +use c; + + +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 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() { 1 } +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; log::l("unexpected line in /proc/scsi/scsi: $_"); error() }; + local $_; + + local *F; + open F, "/proc/scsi/scsi" or return &$err(); + $_ = <F>; /^Attached devices:/ or return &$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; + + -r "/proc/ide" or die "sorry, /proc/ide not available, seems like you have a pre-2.2 kernel\n => not handled yet :("; + + # 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++) { + local *F; + open F, $f or die; + local $_ = <F>; + my ($name) = m|ida/(.*?):| or next; + push @idi, { device => $name, info => "Compaq RAID logical disk", type => 'hd' }; + } + @idi; +} + +sub getDAC960() { + my @idi; + my $file = "/var/log/dmesg"; + -r $file or $file = "/tmp/syslog"; + + local *F; + open F, $file or die "Failed to open $file: $!"; + + # We are looking for lines of this format:DAC960#0: + # /dev/rd/c0d0: RAID-7, Online, 17928192 blocks, Write Thru0123456790123456789012 + foreach (<F>) { + my ($devicename, $info) = m|/dev/rd/(.*?): (.*?),| or next; + push @idi, { info => $info, type => 'hd', devicename => $devicename }; + log::l("DAC960: $devicename: $info"); + } + @idi; +} + + +sub getNet() { + # I should probably ask which device to use if multiple ones are available -- oh well :-( + foreach (qw(eth0 tr0 plip0 plip1 plip2 fddi0)) { + hasNetDevice($_) and log::l("$_ is available -- using it for networking"), return $_; + } + undef; +} +sub getPlip() { + foreach (0..2) { + hasNetDevice("plip$_") 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]) } |