Free solaris filesystems software for linux

Filesystems HOWTO is about filesystems and accessing filesystems from several OSes.

This HOWTO is a document that describes a wide variety of filesystems and instructs you on how to access them from a wide variety of operating systems.

Solaris::Kstat is a Perl module to access Solaris Kstats from Perl.

SYNOPSIS

use Solaris::Kstat;
my $kstat = Solaris::Kstat->new();
my ($usr1, $sys1, $wio1, $idle1) =
@{$kstat->{cpu_stat}{0}{cpu_stat0}}{qw(user kernel wait idle)};
print("usr sys wio idlen");
while (1)
{
sleep 5;
if ($kstat->update()) { print("Configuration changedn"); }
my ($usr2, $sys2, $wio2, $idle2) =
@{$kstat->{cpu_stat}{0}{cpu_stat0}}{qw(user kernel wait idle)};
printf(" %.2d %.2d %.2d %.2dn",
($usr2 - $usr1) / 5, ($sys2 - $sys1) / 5,
($wio2 - $wio1) / 5, ($idle2 - $idle1) / 5);
$usr1 = $usr2; $sys1 = $sys2; $wio1 = $wio2; $idle1 = $idle2;
}

This module provides a tied hash interface to the Solaris kstats library. The kstats library allows you to get access to all the stats used by sar, iostat, vmstat etc, plus a lot of others that arent accessible through the usual utilities.
Solaris categorises statistics using a 3-part key - module, instance and name. For example, the root disk stats can be found under sd.0.sd0, and the cpu statistics can be found under cpu_stat.0.cpu_stat0, as in the above example. The method Solaris::Kstats-new()> creates a new 3-layer tree of perl hashes with exactly the same structure - i.e. the stats for disk 0 can be accessed as $ks-{sd}{0}{sd0}>. The bottom (4th) layer is a tied hash used to hold the individual statistics values for a particular system resource.

Creating a Solaris::Kstat object doesnt actually read all the possible statistics in, as this would be horribly slow and inefficient. Instead it creates a 3-layer structure as described above, and only reads in the individual statistics as you reference them. For example, accessing $ks-{sd}{0}{sd0}{reads} will read in all the statistics for sd0, including writes, bytes read/written, service times etc. Once you have accessed a bottom level statitics value, calling $ks->update() will automatically update all the individual values of any statistics that you have accessed.

Note that there are two values per bottom-level hash that can be read without causing the full set of statistics to be read from the kernel. These are "class" which is the kstat class of the statistics and "crtime" which is the time that the kstat was created. See kstat(3K) for full details of these fields.

Solaris::Disk::SVM::Graph is a Perl module for graph your Solaris Volume Manager configurations.

SYNOPSIS

my $graph = Solaris::Disk::SVM::Graph->new(
sourcedir => path/to/dir, # path to SVM config files,
# see Solaris::Disk::SVM for details
fontname => fontname,
fontsize => fontsize,
);

$graph->output(); # output the whole SVM config to svm.png

# output whole configuration
$graph->output(
output => /path/to/image.svg,
# format deduced from file name, if format
# is not present
format => png, # or anything accepted by GraphViz,
# extension will be appended to output filename
);

# output one device
$graph->output( objects => d10 ); # d10 object with sub-devices to d10.png

# output many devices on same graph
$graph->output( objects => [ d10, d11 ] );

# output one device specifying output file name & format
$graph->output(
objects => d10
output => /path/to/image.svg,
format => png,
);

Filesys::DfPortable is a Perl extension for filesystem disk space information.

SYNOPSIS

use Filesys::DfPortable;

my $ref = dfportable("C:"); # Default block size is 1, which outputs bytes
if(defined($ref)) {
print"Total bytes: $ref->{blocks}n";
print"Total bytes free: $ref->{bfree}n";
print"Total bytes avail to me: $ref->{bavail}n";
print"Total bytes used: $ref->{bused}n";
print"Percent full: $ref->{per}n"
}


my $ref = dfportable("/tmp", 1024); # Display output in 1K blocks
if(defined($ref)) {
print"Total 1k blocks: $ref->{blocks}n";
print"Total 1k blocks free: $ref->{bfree}n";
print"Total 1k blocks avail to me: $ref->{bavail}n";
print"Total 1k blocks used: $ref->{bused}n";
print"Percent full: $ref->{per}n"
}

This module provides a portable way to obtain filesystem disk space information.

The module should work with all versions of Windows (95 and up), and with all flavors of Unix that implement the statvfs or the statfs calls. This would include Linux, *BSD, HP-UX, AIX, Solaris, Mac OS X, Irix, Cygwin, etc ...

This module differs from Filesys::Df in that it has added support for Windows, but does not support open filehandles as a argument.

dfportable() requires a directory argument that represents the filesystem you want to query. There is also an optional block size argument so that you can tailor the size of the values returned. The default block size is 1, this will cause the function to return the values in bytes. If you never use the block size argument, then you can think of any instance of "blocks" in this document to really mean "bytes".

dfportable() returns a reference to a hash. The keys available in the hash are as follows:

{blocks} = Total blocks on the filesystem.
{bfree} = Total blocks free on the filesystem.
{bavail} = Total blocks available to the user executing the Perl application. This can be different than {bfree} if you have per-user quotas on the filesystem, or if the super user has a reserved amount. {bavail} can also be a negative value because of this. For instance if there is more space being used then you have available to you.
{bused} = Total blocks used on the filesystem.
{per} = Percent of disk space used. This is based on the disk space available to the user executing the application. In other words, if the filesystem has 10% of its space reserved for the superuser, then the percent used can go up to 110%.
You can obtain inode information through the module as well. But you must call exists() on the {files} key to make sure the information is available. Some filesystems may not return inode information, for example Windows, and some NFS filesystems.

Here are the available inode keys:

{files} = Total inodes on the filesystem.
{ffree} = Total inodes free on the filesystem.
{favail} = Total inodes available to the user executing the application. See the rules for the {bavail} key.
{fused} = Total inodes used on the filesystem.
{fper} = Percent of inodes used on the filesystem. See rules for the {per} key.

If the dfportable() call fails for any reason, it will return undef. This will probably happen if you do anything crazy like try to get information for /proc, or if you pass an invalid filesystem name, or if there is an internal error. dfportable() will croak() if you pass it a undefined value.

Filesys::Df is a Perl extension for filesystem disk space information.

SYNOPSIS

use Filesys::Df;

#### Get information by passing a scalar directory/filename value
my $ref = df("/tmp"); # Default output is 1K blocks
if(defined($ref)) {
print "Total 1k blocks: $ref->{blocks}n";
print "Total 1k blocks free: $ref->{bfree}n";
print "Total 1k blocks avail to me: $ref->{bavail}n";
print "Total 1k blocks used: $ref->{used}n";
print "Percent full: $ref->{per}n";

if(exists($ref->{files})) {
print "Total inodes: $ref->{files}n";
print "Total inodes free: $ref->{ffree}n";
print "Inode percent full: $ref->{fper}n";
}
}

#### Get information by passing a filehandle
open(FILE, "some_file"); # Get information for filesystem at "some_file"
my $ref = df(*FILE);
#### or
my $ref = df(*FILE);
#### or
my $fhref = *FILE;
my $ref = df($fhref);

#### Get information in other than 1k blocks
my $ref = df("/tmp", 8192); # output is 8K blocks
my $ref = df("/tmp", 1); # output is bytes

This module provides a way to obtain filesystem disk space information. This is a Unix only distribution. If you want to gather this information for Unix and Windows, use Filesys::DfPortable. The only major benefit of using Filesys::Df over Filesys::DfPortable, is that Filesys::Df supports the use of open filehandles as arguments.

The module should work with all flavors of Unix that implement the statvfs() and fstatvfs() calls, or the statfs() and fstatfs() calls. This would include Linux, *BSD, HP-UX, AIX, Solaris, Mac OS X, Irix, Cygwin, etc ...

df() requires a argument that represents the filesystem you want to query. The argument can be either a scalar directory/file name or a open filehandle. There is also an optional block size argument so you can tailor the size of the values returned. The default block size is 1024. This will cause the function to return the values in 1k blocks. If you want bytes, set the block size to 1.

df() returns a reference to a hash. The keys available in the hash are as follows:
{blocks} = Total blocks on the filesystem.
{bfree} = Total blocks free on the filesystem.
{bavail} = Total blocks available to the user executing the Perl application. This can be different than {bfree} if you have per-user quotas on the filesystem, or if the super user has a reserved amount. {bavail} can also be a negative value because of this. For instance if there is more space being used then you have available to you.
{used} = Total blocks used on the filesystem.
{per} = Percent of disk space used. This is based on the disk space available to the user executing the application. In other words, if the filesystem has 10% of its space reserved for the superuser, then the percent used can go up to 110%.
You can obtain inode information through the module as well, but you must call exists() on the {files} key first, to make sure the information is available. Some filesystems may not return inode information, for example some NFS filesystems.
Here are the available inode keys:
{files} = Total inodes on the filesystem.
{ffree} = Total inodes free on the filesystem.
{favail} = Total inodes available to the user executing the application. See the rules for the {bavail} key.
{fused} = Total inodes used on the filesystem.
{fper} = Percent of inodes used on the filesystem. See rules for the {per} key.

There are some undocumented keys that are defined to maintain backwards compatibilty: {su_blocks}, {user_blocks}, etc ...

If the df() call fails for any reason, it will return undef. This will probably happen if you do anything crazy like try to get information for /proc, or if you pass an invalid filesystem name, or if there is an internal error. df() will croak() if you pass it a undefined value.