Re: can one rely on uname -i results?
Dňa 25.05.2013 20:34 Doug wrote / napísal(a): >> Small example from my machine – Debian testing: >> >> slavko@bonifac:~$ uname -i >> unknown >> slavko@bonifac:~$ uname -m >> x86_64 >> > I don't get those results. Here are my results, including the kernel. > > Linux linux1.localdomain 3.2.18-pclos2.pae.bfs #1 SMP PREEMPT Thu May 24 > 05:33:57 CEST 2012 i686 i686 i386 GNU/Linux > [doug@linux1 ~]$ uname -i > i386 > [doug@linux1 ~]$ uname -m > i686 > > IOW, I'm running a 32-bit kernel on a 64-bit processor. > Perhaps uname is set up differently in Debian? Should it be? I am using amd64 kernel from Jessie. Someone described already, that -i option returns info from kernel (if it provides it). It seems, that the i386 kernel provides it, but the amd64 kernel doesn't. You can see in other responses, that i am not only one :-) I want only to demonstrate, that the -i option is not reliable in all cases/systems. regards -- Slavko http://slavino.sk signature.asc Description: OpenPGP digital signature
Re: can one rely on uname -i results?
Wow! Thanks everyone for answers. Its clear for me now. 2013/5/25 Vladimir Budnev > Goodday everyone! > > While trying some opensource utility I'v found that one of launching > scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and > futher processing. > > But on my desktop it gives "unknown", so script does not work as expected. > And at the same time: > steve@dbsteve: /home/coin % > % uname -a > Linux dbsteve 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux > > Does it mean one cant rely on uname -i results or my distro (debian > testing) behaves strange? > > PS > % cat /etc/debian_version > 7.0 > > > > >
Re: can one rely on uname -i results?
On 05/25/2013 07:55 AM, Slavko wrote: Dňa 25.05.2013 12:34 Claudius Hubig wrote / napísal(a): Dear Vladimir, Vladimir Budnev wrote: While trying some opensource utility I'v found that one of launching scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and futher processing. -i is for the ‘hardware platform’. You likely rather want to use ‘-m’, which gives the ‘machine hardware name’. While the naming appears a little strange, the former is probably intended to give the actual hardware architecture, whereas the latter gives the kernel architecture. An i386 kernel running on an amd64 CPU would hence give out ‘i386’ (or something like that) when queried via -m, whereas ‘-i’, if available, would have to say ‘x86_64’ – which doesn’t help at all, since the kernel couldn’t run such code. Small example from my machine – Debian testing: slavko@bonifac:~$ uname -i unknown but: slavko@bonifac:~$ uname -m x86_64 regards I don't get those results. Here are my results, including the kernel. Linux linux1.localdomain 3.2.18-pclos2.pae.bfs #1 SMP PREEMPT Thu May 24 05:33:57 CEST 2012 i686 i686 i386 GNU/Linux [doug@linux1 ~]$ uname -i i386 [doug@linux1 ~]$ uname -m i686 IOW, I'm running a 32-bit kernel on a 64-bit processor. Perhaps uname is set up differently in Debian? Should it be? --doug -- Blessed are the peacemakers..for they shall be shot at from both sides. --A.M.Greeley -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/51a1042e.1020...@optonline.net
Re: can one rely on uname -i results?
On Sat, 25 May 2013 13:55:25 +0200 Slavko wrote: On my Wheezy system: # dpkg --print-architecture amd64 # uname -m x86_64 # uname -i unknown -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130525192734.2189083f@fx4100
Re: can one rely on uname -i results?
On Sb, 25 mai 13, 14:21:29, Vladimir Budnev wrote: > Goodday everyone! > > While trying some opensource utility I'v found that one of launching > scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and > futher processing. > > But on my desktop it gives "unknown", so script does not work as expected. > And at the same time: > steve@dbsteve: /home/coin % > % uname -a > Linux dbsteve 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux > > Does it mean one cant rely on uname -i results or my distro (debian > testing) behaves strange? Depending on what you need the information for you might want to consider using 'dpkg --print-architecture' instead: amp@sid:~$ uname -i unknown amp@sid:~$ uname -m x86_64 amp@sid:~$ dpkg --print-architecture i386 amp@sid:~$ uname -a Linux sid 3.8-2-amd64 #1 SMP Debian 3.8.13-1 x86_64 GNU/Linux As you can see, I'm running the -amd64 kernel with i386 userland. If the script is trying to guess whether to launch a 32 bit or a 64 bit binary, 'uname -i' would be useless and 'uname -m' would be wrong. Kind regards, Andrei -- http://wiki.debian.org/FAQsFromDebianUser Offtopic discussions among Debian users and developers: http://lists.alioth.debian.org/mailman/listinfo/d-community-offtopic signature.asc Description: Digital signature
Re: can one rely on uname -i results?
Dňa 25.05.2013 12:34 Claudius Hubig wrote / napísal(a): > Dear Vladimir, > > Vladimir Budnev wrote: >> While trying some opensource utility I'v found that one of launching >> scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and >> futher processing. > > -i is for the ‘hardware platform’. You likely rather want to use > ‘-m’, which gives the ‘machine hardware name’. While the naming > appears a little strange, the former is probably intended to give the > actual hardware architecture, whereas the latter gives the kernel > architecture. > > An i386 kernel running on an amd64 CPU would hence give out ‘i386’ (or > something like that) when queried via -m, whereas ‘-i’, if available, > would have to say ‘x86_64’ – which doesn’t help at all, since the > kernel couldn’t run such code. Small example from my machine – Debian testing: slavko@bonifac:~$ uname -i unknown but: slavko@bonifac:~$ uname -m x86_64 regards -- Slavko http://slavino.sk signature.asc Description: OpenPGP digital signature
Re: can one rely on uname -i results?
Dear Vladimir, Vladimir Budnev wrote: > While trying some opensource utility I'v found that one of launching > scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and > futher processing. -i is for the ‘hardware platform’. You likely rather want to use ‘-m’, which gives the ‘machine hardware name’. While the naming appears a little strange, the former is probably intended to give the actual hardware architecture, whereas the latter gives the kernel architecture. An i386 kernel running on an amd64 CPU would hence give out ‘i386’ (or something like that) when queried via -m, whereas ‘-i’, if available, would have to say ‘x86_64’ – which doesn’t help at all, since the kernel couldn’t run such code. Best, Claudius -- Please don’t CC me. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130525113456.7b00e...@ares.home.chubig.net
Re: can one rely on uname -i results?
On Sat 25 May 2013 at 14:21:29 +0400, Vladimir Budnev wrote: > While trying some opensource utility I'v found that one of launching > scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and > futher processing. > > But on my desktop it gives "unknown", so script does not work as expected. > And at the same time: > steve@dbsteve: /home/coin % > % uname -a > Linux dbsteve 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux > > Does it mean one cant rely on uname -i results or my distro (debian > testing) behaves strange? > > PS > % cat /etc/debian_version > 7.0 >From the info page for uname: '-i' '--hardware-platform' Print the hardware platform name (sometimes called the hardware implementation). Print 'unknown' if the kernel does not make this information easily available, as is the case with Linux kernels. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130525104613.GG3596@desktop
can one rely on uname -i results?
Goodday everyone! While trying some opensource utility I'v found that one of launching scripts uses uname -i | grep x86_64 to check for 64/32 bit platform and futher processing. But on my desktop it gives "unknown", so script does not work as expected. And at the same time: steve@dbsteve: /home/coin % % uname -a Linux dbsteve 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2 x86_64 GNU/Linux Does it mean one cant rely on uname -i results or my distro (debian testing) behaves strange? PS % cat /etc/debian_version 7.0
