How to tell a 32 bit machine from 64?

[stackdump]

I am writing some csh files and need to find a way of telling whether a machine is 32-bit or 64-bit so that I can branch the code.

I guess its a parameter from uname but I cant see any likely candidates. Any help appreciated.

 

[Ogzilal]

Hi,

What OS are you wrking on ?

On a Linux redhat box

getconf WORD_BIT
32

On AIX box

bootinfo -K
32

 

[AnotherAlan]

On Solaris isainfo -vk

 

[LKBrwnDBA]

PS: You should re-consider the use of csh, instead use ksh, bash or even sh (whichever is available to you).


----------------------------------------------------------------------------
The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

 

[khalidaaa]

You can as well see the unix to which kernal it is linked to!

ls -al /unix!

If it was linked to /usr/lib/boot/unix_64 then the kernal is 64 but if it was linked to /usr/lib/boot/unix_mp then it is 32 (That's an aix example but i think it is somehow common for the reset)

bootinfo -K will definitly do the job!

Regards,
Khalid

 

[stackdump]

Thanks.

I ended up using;
uname -m
which is x86_64 for 64 bit or i686, i386 for 32 bit.

 

[yai]

on hpux:
getconf KERNEL_BITS
64

 

[Salem]

> PS: You should re-consider the use of csh, instead use ksh, bash or even sh (whichever is available to you).
Or maybe not.

http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/

--
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.