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Full Discussion: How to know endianness of a machine
Top Forums UNIX for Advanced & Expert Users How to know endianness of a machine Post 302700551 by Perderabo on Thursday 13th of September 2012 03:43:05 PM
Old 09-13-2012
We still some some Sparc systems, so I gave it a try...

First on Linux:
Code:
$ uname -is
Linux x86_64
$ perl -MConfig -e 'print "$Config{byteorder}\n";'
12345678
$ echo I | tr -d [:space:] | od -to2 | awk 'FNR==1{ print substr($2,6,1)}'
1
$ printf '\1' | od -dAn
     1
$

Now on Solaris:
Code:
$
$ uname -is
SunOS SUNW,Sun-Blade-1000
$ perl -MConfig -e 'print "$Config{byteorder}\n";'
87654321
$
$ echo I | tr -d [:space:] | od -to2 | awk 'FNR==1{ print substr($2,6,1)}'
$
$
$ echo I | tr -d [:space:] | od -to2 | nawk 'FNR==1{ print substr($2,6,1)}'
0
$ printf '\1' | od -dAn
         00256

$

I was surprised at first that the second one gave me trouble. Then I remembered that famous Solaris awk vs nawk thing and got it to work. My favorite is the perl line.
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LEARN ABOUT DEBIAN

mtext_case_compare

mtext_case_compare(3m17n)					 The m17n Library					 mtext_case_compare(3m17n)

NAME

       mtext_case_compare - Compare specified regions of two M-texts ignoring cases.

SYNOPSIS

       int mtext_case_compare (MText * mt1, int from1, int to1, MText * mt2, int from2, int to2)

DESCRIPTION

       Compare specified regions of two M-texts ignoring cases. The mtext_case_compare() function compares two M-texts mt1 and mt2,
       character-by-character, ignoring cases. The compared regions are between from1 and to1 in mt1 and from2 to to2 in MT2.  from1 and from2 are
       inclusive, to1 and to2 are exclusive.  from1 being equal to to1 (or from2 being equal to to2) means an M-text of length zero. An invalid
       region specification is regarded as both from1 and to1 (or from2 and to2) being 0.

RETURN VALUE

	   This function returns 1, 0, or -1 if mt1 is found greater than, equal to, or less than mt2, respectively. Comparison is based on
	   character codes.

SEE ALSO

	   mtext_cmp(), mtext_ncmp(), mtext_casecmp(), mtext_ncasecmp(), mtext_compare()

COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 					 mtext_case_compare(3m17n)
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