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Document _POSIX2_VERSION.

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This commit is contained in:
Jim Meyering 2002-02-16 08:22:32 +00:00
parent 5de5f30d9b
commit 9fff44980c
1 changed files with 7 additions and 3 deletions
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@ -3,7 +3,11 @@ Changes in release 2.1
* split accepts new option -a or --suffix-length.
* split no longer generates longer suffixes than requested; instead, it reports
an error when suffixes are exhausted. POSIX requires this behavior.
* The following obsolete usages are no longer supported on systems conforming
* The _POSIX2_VERSION environment variable lets you select which version
of POSIX the utilities should conform to. Its default value is system
dependent. Set _POSIX2_VERSION=199209 to cause the utilities to support
obsolete usage like "sort +1".
* The following obsolete usages are no longer supported when conforming
to POSIX 1003.1-2001, which prohibits most digit-string options:
expand -N (instead, use expand -t N)
head -N (instead, use head -c N or head -n N)
@ -13,14 +17,14 @@ Changes in release 2.1
unexpand -N (instead, use unexpand --first-only -t N)
uniq -N (instead, use uniq -f N)
The following obsolete usages (options without arguments) are no
longer supported on systems conforming to POSIX 1003.1-2001, which
longer supported when conforming to POSIX 1003.1-2001, which
prohibits most options with optional arguments:
od -s (instead, use od --strings)
od -w (instead, use od --width)
pr -S (instead, use pr --sep-string)
[2.0.20]
* tr no longer gets failed a assertion for [==] or [::]
* The following obsolete usages are no longer supported on systems conforming
* The following obsolete usages are no longer supported when conforming
to POSIX 1003.1-2001, which prohibits most options with leading "+":
sort +POS1 -POS2 (instead, use sort -k)
tail +N (instead, use tail -c +N or tail -n +N)