Differences between current version and revision by previous author of POSIXLY_CORRECT.
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| Newer page: | version 6 | Last edited on Wednesday, March 30, 2005 12:13:26 pm | by AristotlePagaltzis | |
| Older page: | version 5 | Last edited on Monday, March 28, 2005 10:10:43 pm | by DominiqueQuatravaux | Revert |
@@ -1,13 +1,19 @@
-[POSIXLY_CORRECT] is an environment variable
that some programs use to follow strict [POSIX] standards behaviour, where that isn't the default. See also [POSIX_ME_HARDER]
.
+[POSIXLY_CORRECT] is an EnvironmentVariable
that some programs use to follow strict [POSIX] standards behaviour, where that isn't the default.
-Probably the most well-known example of this is that [POSIX] states that filesystem blocks are 512 bytes per block, so the [GNU] fileutils such as df(1) and GNU tar(1) use 512 if the variable [POSIXLY_CORRECT] is set, and 1024 bytes per block by default.
+Probably the most well-known example of this is that [POSIX] states that filesystem blocks are 512 bytes per block, so the [GNU] fileutils such as df(1) and GNU tar(1) use 512 if the variable [POSIXLY_CORRECT] is set, and 1024 bytes per block by default. (See [Democracy Triumphs in Disk Units | http://groups.google.com/groups?selm=9108281809.AA03552%40mole.gnu.ai.mit.edu])
-Many of the GNU tools comply with [POSIX] by default, except for where the author thinks the [POSIX] standard is wrong or dumb. :) As a result
, some programs also check if a
variable named [POSIX_ME_HARDER] is set
as an acceptable alias for [POSIXLY_CORRECT]. See [Democracy Triumphs in Disk Units|http://groups.google.com/groups?selm=9108281809.AA03552%40mole.gnu.ai.mit.edu
].
+Many of the GNU tools comply with [POSIX] by default, except for where the author thinks the [POSIX] standard is wrong or dumb. <tt>
:)</tt> For the same reason
, some programs treat an
variable named [POSIX_ME_HARDER] as an acceptable alias for [POSIXLY_CORRECT].
Some programs that behave differently if [POSIXLY_CORRECT] is set:
+
* bash(1)
* df(1)
-* any program using getopt(3) - if [POSIXLY_CORRECT] is set, then getopt stops processing options after the first non-option.
* patch(1)
-* true(1) and
false(1).
From the NEWS file: ''
false and true now ignore --help and --version when [POSIXLY_CORRECT] is set''
-*
yes(1) - '' 'yes --help' and 'yes --version' print those
strings when
the [POSIXLY_CORRECT] environment variable
is set''
+* true(1),
false(1) and yes(1)
+
+
From the NEWS file for true(1)/false(1)
:
+ >
false and true now ignore <tt>
--help</tt>
and <tt>
--version</tt>
when [POSIXLY_CORRECT] is set.
+
+
yes(1) prints these options as output
strings rather than ignoring them.
+
+* any program using getopt(3), since
the function stops processing options after the first non-option if
[POSIXLY_CORRECT] is set
