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| author | Eric Blake <eblake@redhat.com> | 2010-04-20 16:26:27 -0600 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2010-04-21 07:59:03 -0600 |
| commit | a9b904a282b5ca61c9a1f41389832747689ed9cf (patch) | |
| tree | d996f4ae5c9d705205e4f11d94ce86780d9c8b8f | |
| parent | 7dc398a30f9edee4af9d0676d7c682db0f83fa8d (diff) | |
| download | coreutils-a9b904a282b5ca61c9a1f41389832747689ed9cf.tar.xz | |
docs: document transformation of obsolete sort syntax
* doc/coreutils.texi (sort invocation): Mention the conversion.
| -rw-r--r-- | doc/coreutils.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index 7561f2a61..f40993ec1 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -4126,6 +4126,11 @@ is counted from the first nonblank character of the field. @vindex POSIXLY_CORRECT On older systems, @command{sort} supports an obsolete origin-zero syntax @samp{+@var{pos1} [-@var{pos2}]} for specifying sort keys. +The obsolete sequence @samp{sort +@var{a}.@var{x} -@var{b}.@var{y}} +is equivalent to @samp{sort -k @var{a+1}.@var{x+1},@var{b}} if @var{y} +is @samp{0} or absent, otherwise it is equivalent to @samp{sort -k +@var{a+1}.@var{x+1},@var{b+1}.@var{y}}. + This obsolete behavior can be enabled or disabled with the @env{_POSIX2_VERSION} environment variable (@pxref{Standards conformance}); it can also be enabled when @env{POSIXLY_CORRECT} is |