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| author | Pádraig Brady <P@draigBrady.com> | 2010-02-01 15:19:08 +0000 |
|---|---|---|
| committer | Pádraig Brady <P@draigBrady.com> | 2010-02-01 15:36:56 +0000 |
| commit | f86bb6967dba1e2b6026997963a90e00cd641490 (patch) | |
| tree | 0b4451e967924bfba4c42f9c819c0e33b1b53c95 /doc | |
| parent | 819aa9eba741c36bb522cbc2c7f10e24d190f945 (diff) | |
| download | coreutils-f86bb6967dba1e2b6026997963a90e00cd641490.tar.xz | |
join: make -t '' operate on the whole line
Previously passing an empty parameter to -t would
raise an error, but now it means to treat each line
as a single field for matching. This matches the
default operation of `sort` which is usually used
in conjunction with join.
* src/join.c (main): Set the field delimiter to '\n' if
an empty parameter is passed to -t.
(usage): Mention the operation of -t ''.
* tests/misc/join: Add 2 new tests, for the existing -t '\0'
and the new -t '' functionality.
* doc/coreutils.texi (join invocation): Mention that
join -t '' always operates on the whole line, while
join -t '\0' usually does.
* NEWS: Mention the change in behavior.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/coreutils.texi | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index 2b3d32b94..e3e95f5b6 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -5462,6 +5462,8 @@ locales and options if the output of @command{sort} is fed to sort a file on its default join field, but if you select a non-default locale, join field, separator, or comparison options, then you should do so consistently between @command{join} and @command{sort}. +If @samp{join -t ''} is specified then the whole line is considered which +matches the default operation of sort. If the input has no unpairable lines, a @acronym{GNU} extension is available; the sort order can be any order that considers two fields @@ -5572,7 +5574,10 @@ option---are subject to the specified @var{field-list}. Use character @var{char} as the input and output field separator. Treat as significant each occurrence of @var{char} in the input file. Use @samp{sort -t @var{char}}, without the @option{-b} option of -@samp{sort}, to produce this ordering. +@samp{sort}, to produce this ordering. If @samp{join -t ''} is specified, +the whole line is considered, matching the default operation of sort. +If @samp{-t '\0'} is specified then the @acronym{ASCII} @sc{nul} +character is used to delimit the fields. @item -v @var{file-number} Print a line for each unpairable line in file @var{file-number} |