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Re: Tail +N apparent error.
From: |
Alfred M. Szmidt |
Subject: |
Re: Tail +N apparent error. |
Date: |
Fri, 09 Oct 2009 08:31:33 -0400 |
tail +n is a obsolete syntax, and was deprecate in POSIX 1003.1-2001.
>From the coreutils manual:
| Standards conformance
| ==========================
|
| In a few cases, the GNU utilities' default behavior is incompatible
| with the POSIX standard. To suppress these incompatibilities, define
| the `POSIXLY_CORRECT' environment variable. Unless you are checking
| for POSIX conformance, you probably do not need to define
| `POSIXLY_CORRECT'.
|
| Newer versions of POSIX are occasionally incompatible with older
| versions. For example, older versions of POSIX required the command
| `sort +1' to sort based on the second and succeeding fields in each
| input line, but starting with POSIX 1003.1-2001 the same command is
| required to sort the file named `+1', and you must instead use the
| command `sort -k 2' to get the field-based sort.
|
| The GNU utilities normally conform to the version of POSIX that is
| standard for your system. To cause them to conform to a different
| version of POSIX, define the `_POSIX2_VERSION' environment variable to
| a value of the form YYYYMM specifying the year and month the standard
| was adopted. Two values are currently supported for `_POSIX2_VERSION':
| `199209' stands for POSIX 1003.2-1992, and `200112' stands for POSIX
| 1003.1-2001. For example, if you have a newer system but are running
| software that assumes an older version of POSIX and uses `sort +1' or
| `tail +10', you can work around any compatibility problems by setting
| `_POSIX2_VERSION=199209' in your environment.
- Tail +N apparent error., Jan-Pawel Wrozstojnik, 2009/10/09
- Tail +N apparent error., Jan-Pawel Wrozstojnik, 2009/10/09
- Re: Tail +N apparent error.,
Alfred M. Szmidt <=
- Re: Tail +N apparent error., Jan-Pawel Wrozstinski, 2009/10/12
- Re: Tail +N apparent error., Eric Blake, 2009/10/12
- Re: Tail +N apparent error., Jim Meyering, 2009/10/12
- Update,Manager and Core Utils (Was: Tail +N apparent error.), Jan-Pawel Wrozstinski, 2009/10/13
- Re: Update Manager and Core Utils, Jan-Pawel Wrozstinski, 2009/10/14
- Re: Update Manager and Core Utils, C de-Avillez, 2009/10/15
- Re: Update,Manager and Core Utils (Was: Tail +N apparent error.), Eric Blake, 2009/10/14