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bug#26029: Problems with join
From: |
Reuti |
Subject: |
bug#26029: Problems with join |
Date: |
Thu, 9 Mar 2017 11:57:07 +0100 |
Hi,
> Am 08.03.2017 um 19:17 schrieb Reuti <address@hidden>:
>
> […]
> The strange thing seems to be, that "-j1 2" is handled like "-1 2". "-j 1"
> should already have an option and "2" would then become the first filename
> making the last filename in the command line superfluous.
My investigations revealed: on a Mac the man page of `join` explains the
behavior. The options -j, -j1 and -j2 are listed with the BSD version of `join`
as being there for compatibility. This leads to the assumption, that nowadays
-1 and -2 should better be used.
The coreutils version of `join` doesn't explain -j1 or -j2 anywhere AFAICS (but
the `join` application covers them as special cases in the source). Neither on
the man page, nor the info page it's mentioned. At least this should be noted
somewhere. Personally I find it confusing, that "-j 3" is like "-j3", but "-j1"
and -"j2" are special and need an argument. The info page even lists "-j3" in
the examples (no intervening blank). It would be good if there would be a hint
of this trap on the man page, as the plain statment:
-j FIELD
equivalent to '-1 FIELD -2 FIELD'
does not work in all cases essentially. (One could argue, that no one will use
"-j1" standing alone and expecting it to work as "-j 1" as it's the default
anyway, but at least "-j2" might give some surprise.)
-- Reuti
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- bug#26029: Problems with join, Peter Kluge, 2017/03/08
- bug#26029: Problems with join, Reuti, 2017/03/08
- bug#26029: Problems with join,
Reuti <=
- Message not available
- bug#26029: Problems with join, Reuti, 2017/03/09
- bug#26029: Problems with join, Assaf Gordon, 2017/03/09
- bug#26029: Problems with join, Reuti, 2017/03/09
- bug#26029: Problems with join, Assaf Gordon, 2017/03/30
- bug#26029: Problems with join, Paul Eggert, 2017/03/31
bug#26029: Problems with join, Bernhard Voelker, 2017/03/08