diff options
Diffstat (limited to 'doc/coreutils.texi')
| -rw-r--r-- | doc/coreutils.texi | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index ebe379eb6..d6e98c6d6 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -5701,8 +5701,8 @@ Do not check that both input files are in sorted order. This is the default. @item -e @var{string} @opindex -e -Replace those output fields that are missing in the input with -@var{string}. +Replace those output fields that are missing in the input with @var{string}. +I.E. missing fields specified with the @option{-12jo} options. @item --header @opindex --header @@ -5733,10 +5733,17 @@ Join on field @var{field} (a positive integer) of file 2. Equivalent to @option{-1 @var{field} -2 @var{field}}. @item -o @var{field-list} -Construct each output line according to the format in @var{field-list}. -Each element in @var{field-list} is either the single character @samp{0} or -has the form @var{m.n} where the file number, @var{m}, is @samp{1} or -@samp{2} and @var{n} is a positive field number. +@itemx -o auto +If the keyword @samp{auto} is specified, infer the output format from +the first line in each file. This is the same as the default output format +but also ensures the same number of fields are output for each line. +Missing fields are replaced with the @option{-e} option and extra fields +are discarded. + +Otherwise, construct each output line according to the format in +@var{field-list}. Each element in @var{field-list} is either the single +character @samp{0} or has the form @var{m.n} where the file number, @var{m}, +is @samp{1} or @samp{2} and @var{n} is a positive field number. A field specification of @samp{0} denotes the join field. In most cases, the functionality of the @samp{0} field spec |