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authorChmouel Boudjnah <chmouel@mandriva.org>1999-07-01 12:29:54 +0000
committerChmouel Boudjnah <chmouel@mandriva.org>1999-07-01 12:29:54 +0000
commite1729dfdb9c341fe0b9fed7d7b0a80691a547d82 (patch)
treeb72fd8f59af166fe944ebcf114d648ed5644f752 /perl-install/devices.pm
parentb50e655e352e2524fb3fb84b2bb4bc96e6a04cf0 (diff)
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"See_The_Changelog"
Diffstat (limited to 'perl-install/devices.pm')
-rw-r--r--perl-install/devices.pm107
1 files changed, 107 insertions, 0 deletions
diff --git a/perl-install/devices.pm b/perl-install/devices.pm
new file mode 100644
index 000000000..704b3d40d
--- /dev/null
+++ b/perl-install/devices.pm
@@ -0,0 +1,107 @@
+package devices;
+
+use diagnostics;
+use strict;
+
+use common qw(:system :file);
+use run_program;
+use log;
+use c;
+
+1;
+
+
+sub size($) {
+ local *F;
+ sysopen F, $_[0], 0 or log::l("open $_[0]: $!"), return 0;
+
+ my $valid_offset = sub { sysseek(F, $_[0], 0) && sysread(F, my $a, 1) };
+
+ # first try getting the size nicely
+ my $size = 0;
+ ioctl(F, c::BLKGETSIZE(), $size) and return unpack("i", $size) * $common::SECTORSIZE;
+
+ # sad it didn't work, well searching the size using the dichotomy algorithm!
+ my $low = 0;
+ my ($high, $mid);
+
+ # first find n where 2^n < size <= 2^n+1
+ for ($high = 1; $high > 0 && &$valid_offset($high); $high *= 2) { $low = $high; }
+
+ while ($low < $high - 1) {
+ $mid = int ($low + $high) / 2;
+ &$valid_offset($mid) ? $low : $high = $mid;
+ }
+ $low + 1;
+}
+
+sub make($) {
+ local $_ = my $file = $_[0];
+ my ($type, $major, $minor);
+
+ unless (s,^/(dev|tmp)/,,) {
+ $file = -e "/dev/$file" ? "/dev/$file" : "/tmp/$file";
+ }
+
+ -e $file and return $file; # assume nobody takes fun at creating files named as device
+
+ if (/^sd(.)(\d\d)/) {
+ $type = c::S_IFBLK();
+ $major = 8;
+ $minor = ord($1) - ord('a') + $2;
+ } elsif (/^hd(.)(\d{0,2})/) {
+ $type = c::S_IFBLK();
+ ($major, $minor) =
+ @{ $ {{'a' => [3, 0], 'b' => [3, 64],
+ 'c' => [22,0], 'd' => [22,64],
+ 'e' => [33,0], 'f' => [33,64],
+ 'g' => [34,0], 'h' => [34,64],
+ }}{$1} or die "unknown device $_" };
+ $minor += $2 || 0;
+ } elsif (/^ram(.)/) {
+ $type = c::S_IFBLK();
+ $major = 1;
+ $minor = $1 eq '' ? 1 : $1;
+ } elsif (m|^rd/c(\d+)d(\d+)(p(\d+))?|) {
+ # dac 960 "/rd/cXdXXpX"
+ $type = c::S_IFBLK();
+ $major = 48 + $1;
+ $minor = 8 * $2 + $4;
+ } elsif (m|ida/c(\d+)d(\d+)(p(\d+))|) {
+ # Compaq Smart Array "ida/c0d0{p1}"
+ $type = c::S_IFBLK();
+ $major = 72 + $1;
+ $minor = 16 * $2 + $4;
+ } else {
+ ($type, $major, $minor) =
+ @{ $ {{"aztcd" => [ c::S_IFBLK(), 29, 0 ],
+ "bpcd" => [ c::S_IFBLK(), 41, 0 ],
+ "cdu31a" => [ c::S_IFBLK(), 15, 0 ],
+ "cdu535" => [ c::S_IFBLK(), 24, 0 ],
+ "cm206cd" => [ c::S_IFBLK(), 32, 0 ],
+ "tty" => [ c::S_IFCHR(), 5, 0 ],
+ "fd0" => [ c::S_IFBLK(), 2, 0 ],
+ "fd1" => [ c::S_IFBLK(), 2, 1 ],
+ "gscd" => [ c::S_IFBLK(), 16, 0 ],
+ "lp0" => [ c::S_IFCHR(), 6, 0 ],
+ "lp1" => [ c::S_IFCHR(), 6, 1 ],
+ "lp2" => [ c::S_IFCHR(), 6, 2 ],
+ "mcd" => [ c::S_IFBLK(), 23, 0 ],
+ "mcdx" => [ c::S_IFBLK(), 20, 0 ],
+ "nst0" => [ c::S_IFCHR(), 9, 128 ],
+ "optcd" => [ c::S_IFBLK(), 17, 0 ],
+ "sbpcd" => [ c::S_IFBLK(), 25, 0 ],
+ "scd0" => [ c::S_IFBLK(), 11, 0 ],
+ "scd1" => [ c::S_IFBLK(), 11, 1 ],
+ "sjcd" => [ c::S_IFBLK(), 18, 0 ],
+ }}{$_} or die "unknown device $type" };
+ }
+
+ # make a directory for this inode if needed.
+ mkdir dirname($file), 0755;
+
+ syscall_('mknod', $file, $type | 0600, makedev($major, $minor)) or die "mknod failed (dev:$_): $!";
+
+ $file;
+}
+