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doc: update for ISO/IEC 80000-13

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* doc/coreutils.texi (Block size): IEC 60027-2 has been superseded
by ISO/IEC 80000-13, so prefer the newer standard but also mention
the old.  The new standard specifies Zi and Yi, so they are no
longer GNU extensions.  Fix stale URL to BIPM.

2011-11-14  Paul Eggert  <eggert@cs.ucla.edu>

id: handle (uid_t) -1 more portably
* src/id.c (GETID_MAY_FAIL): Remove.
(main): Check for negative return values, not for -1.
The old code was incorrect if uid_t was narrower than int,
regardless of whether we were on a GNU or a POSIX platform.
The new code is simpler and doesn't need GETID_MAY_FAIL.
(print_full_info): Remove unnecessary cast to -1.
This commit is contained in:
Paul Eggert
2011-11-15 08:20:59 -08:00
parent 40324ca8b2
commit 06ca3797ac
2 changed files with 23 additions and 18 deletions
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10
doc/coreutils.texi
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@@ -901,10 +901,10 @@ A block size specification can be a positive integer specifying the number
of bytes per block, or it can be @code{human-readable} or @code{si} to
select a human-readable format. Integers may be followed by suffixes
that are upward compatible with the
@uref{http://www.bipm.fr/enus/3_SI/si-prefixes.html, SI prefixes}
@uref{http://www.bipm.org/en/si/si_brochure/chapter3/prefixes.html, SI prefixes}
for decimal multiples and with the
@uref{http://physics.nist.gov/cuu/Units/binary.html, IEC 60027-2
prefixes for binary multiples}.
@uref{http://physics.nist.gov/cuu/Units/binary.html, ISO/IEC 80000-13
(formerly IEC 60027-2) prefixes} for binary multiples.
With human-readable formats, output sizes are followed by a size letter
such as @samp{M} for megabytes. @code{BLOCK_SIZE=human-readable} uses
@@ -946,7 +946,7 @@ kilobyte: @math{10^3 = 1000}.
@itemx KiB
@cindex kibibyte, definition of
kibibyte: @math{2^{10} = 1024}. @samp{K} is special: the SI prefix is
@samp{k} and the IEC 60027-2 prefix is @samp{Ki}, but tradition and
@samp{k} and the ISO/IEC 80000-13 prefix is @samp{Ki}, but tradition and
@acronym{POSIX} use @samp{k} to mean @samp{KiB}.
@item MB
@cindex megabyte, definition of
@@ -989,14 +989,12 @@ zettabyte: @math{10^{21} = 1,000,000,000,000,000,000,000}
@item Z
@itemx ZiB
@math{2^{70} = 1,180,591,620,717,411,303,424}.
(@samp{Zi} is a @acronym{GNU} extension to IEC 60027-2.)
@item YB
@cindex yottabyte, definition of
yottabyte: @math{10^{24} = 1,000,000,000,000,000,000,000,000}.
@item Y
@itemx YiB
@math{2^{80} = 1,208,925,819,614,629,174,706,176}.
(@samp{Yi} is a @acronym{GNU} extension to IEC 60027-2.)
@end table
@opindex -k