How to know the OS architecture (32 or 64 bits)?
in [Ruby]
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From: Walton Hoops on 15 Jan 2010 11:36 On 1/14/2010 4:12 PM, Iñaki Baz Castillo wrote: > Hi, is there a reliable way under Ruby to know the OS architecture (32 or 64 > bits)? > > I've just found RUBY_PLATFORM constant which returns "x86_64-linux" under 64 > bits, however it doesn't send very reliable for me. > > I need a way working under Linux and BSD. Thanks for any suggestion. > > I can't vouch for how accurate it is, but an OS gem was recently announced on this list. gem install os irb(main):001:0> require 'os' => true irb(main):002:0> OS.bits => 64 irb(main):004:0> OS.posix? => true irb(main):005:0>
From: Walton Hoops on 15 Jan 2010 11:40 On 1/15/2010 9:36 AM, Walton Hoops wrote: > On 1/14/2010 4:12 PM, Iñaki Baz Castillo wrote: >> Hi, is there a reliable way under Ruby to know the OS architecture >> (32 or 64 >> bits)? >> >> I've just found RUBY_PLATFORM constant which returns "x86_64-linux" >> under 64 >> bits, however it doesn't send very reliable for me. >> >> I need a way working under Linux and BSD. Thanks for any suggestion. >> > > I can't vouch for how accurate it is, but an OS gem was recently > announced on this list. > gem install os > > irb(main):001:0> require 'os' > => true > irb(main):002:0> OS.bits > => 64 > irb(main):004:0> OS.posix? > => true > irb(main):005:0> > > Hmm.. it does not appear to deal with 32-bit ruby running on a 64 bit system though. On my Windows 7 x64 (with 32-bit ruby): irb(main):005:0> OS.bits => 32 irb(main):006:0> 1.size => 4 irb(main):007:0>
From: Iñaki Baz Castillo on 15 Jan 2010 11:44 El Viernes, 15 de Enero de 2010, Walton Hoops escribió: > On 1/15/2010 9:36 AM, Walton Hoops wrote: > > On 1/14/2010 4:12 PM, Iñaki Baz Castillo wrote: > >> Hi, is there a reliable way under Ruby to know the OS architecture > >> (32 or 64 > >> bits)? > >> > >> I've just found RUBY_PLATFORM constant which returns "x86_64-linux" > >> under 64 > >> bits, however it doesn't send very reliable for me. > >> > >> I need a way working under Linux and BSD. Thanks for any suggestion. > > > > I can't vouch for how accurate it is, but an OS gem was recently > > announced on this list. > > gem install os > > > > irb(main):001:0> require 'os' > > => true > > irb(main):002:0> OS.bits > > => 64 > > irb(main):004:0> OS.posix? > > => true > > irb(main):005:0> > > Hmm.. it does not appear to deal with 32-bit ruby running on a 64 bit > system though. > On my Windows 7 x64 (with 32-bit ruby): > irb(main):005:0> OS.bits > => 32 > irb(main):006:0> 1.size > => 4 > irb(main):007:0> Interesting, I'll take a look to its implementation. However in my case I will never run 32 bits Ruby over a 64 bits SO. -- Iñaki Baz Castillo <ibc(a)aliax.net>
From: Iñaki Baz Castillo on 15 Jan 2010 11:51 El Viernes, 15 de Enero de 2010, Walton Hoops escribió: > On 1/15/2010 9:36 AM, Walton Hoops wrote: > > On 1/14/2010 4:12 PM, Iñaki Baz Castillo wrote: > >> Hi, is there a reliable way under Ruby to know the OS architecture > >> (32 or 64 > >> bits)? > >> > >> I've just found RUBY_PLATFORM constant which returns "x86_64-linux" > >> under 64 > >> bits, however it doesn't send very reliable for me. > >> > >> I need a way working under Linux and BSD. Thanks for any suggestion. > > > > I can't vouch for how accurate it is, but an OS gem was recently > > announced on this list. > > gem install os > > > > irb(main):001:0> require 'os' > > => true > > irb(main):002:0> OS.bits > > => 64 > > irb(main):004:0> OS.posix? > > => true > > irb(main):005:0> > > Hmm.. it does not appear to deal with 32-bit ruby running on a 64 bit > system though. > On my Windows 7 x64 (with 32-bit ruby): > irb(main):005:0> OS.bits > => 32 > irb(main):006:0> 1.size > => 4 > irb(main):007:0> Note that to know the bits it uses "rbconfig" gem, and them: def self.bits @bits ||= begin require 'rbconfig' host_os = RbConfig::CONFIG['host_os'] if host_os =~ /32/ 32 else if host_os =~ /64/ 64 else # cygwin... if (1<<32).class == Fixnum 64 else 32 end end end end end In my server RbConfig::CONFIG['host_os'] = "linux-gnu" so finally it ends doing: if (1<<32).class == Fixnum 64 else 32 end Which is basically the same as doing if 1.size == 8 64 else 32 end -- Iñaki Baz Castillo <ibc(a)aliax.net>
From: Iñaki Baz Castillo on 15 Jan 2010 11:59
El Viernes, 15 de Enero de 2010, Iñaki Baz Castillo escribió: > Note that to know the bits it uses "rbconfig" gem, and them: Well, "rbconfig" is not a gem but a Ruby built in library. > In my server RbConfig::CONFIG['host_os'] = "linux-gnu" so finally it ends > doing: > > if (1<<32).class == Fixnum > 64 > else > 32 > end > > Which is basically the same as doing > > if 1.size == 8 > 64 > else > 32 > end > Definitively I don't like "os" gem at all. It could use RbConfig::CONFIG['host_cpu'] rather than the not reliable RbConfig::CONFIG['host_os']: a) 32 bits host: RbConfig::CONFIG['host_os'] => "linux-gnu" RbConfig::CONFIG['host_cpu'] => "i486" b) 64 bits host: RbConfig::CONFIG['host_os'] => "linux-gnu" RbConfig::CONFIG['host_cpu'] => "x86_64" -- Iñaki Baz Castillo <ibc(a)aliax.net> |