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getopt-gnu: flush out another BSD bug

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POSIX requires 'echo foo > bar; m4 -Dfoo=1 bar -Dfoo=2 bar' to
output '1' then '2'.  To achieve this, m4 relies on the GNU
getopt{,_long} extension of a leading '-'.  However, BSD getopt
fails to honor this extension when POSIXLY_CORRECT.

Also, BSD getopt fails to reparse POSIXLY_CORRECT from the
environment even when a reset is requested (whether by
optreset=1 or by optind=0).

* m4/getopt.m4 (gl_GETOPT_CHECK_HEADERS): Test for the bug.
* tests/test-getopt.c (main): Check POSIXLY_CORRECT first, to
flush out BSD bug.
* tests/test-getopt.h (test_getopt): End lists with NULL.
* tests/test-getopt_long.h (test_getopt_long): Likewise.
(test_getopt_long_posix): Enhance test.
* modules/getopt-posix-tests (Depends-on): Add stdbool.
* doc/glibc-functions/getopt_long.texi (getopt_long): Mention
getopt-gnu.
* doc/glibc-functions/getopt_long_only.texi (getopt_long_only):
Likewise.

Signed-off-by: Eric Blake <ebb9@byu.net>
This commit is contained in:
Eric Blake
2009-11-27 17:47:21 -07:00
parent 6184bd1482
commit c0c5acfbe2
9 changed files with 409 additions and 192 deletions
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24
doc/glibc-functions/getopt_long.texi
View File

@@ -2,15 +2,33 @@
@subsection @code{getopt_long}
@findex getopt_long
Gnulib module: ---
Gnulib module: getopt-gnu
Portability problems fixed by Gnulib:
@itemize
@item
The function @code{getopt_long} does not support the @samp{+} flag in
the options string on some platforms:
MacOS X 10.5, AIX 5.2, OSF/1 5.1, Solaris 10.
@item
The function @code{getopt_long} does not obey the @samp{-} flag in the
options string when @env{POSIXLY_CORRECT} is set on some platforms:
Cygwin 1.7.0.
@item
The function @code{getopt_long} does not support options with optional
arguments on some platforms:
MacOS X 10.5, OpenBSD 4.0, AIX 5.2, IRIX 6.5, Solaris 10, Cygwin 1.5.x.
@item
This function is missing on some platforms:
AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Interix 3.5.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Interix 3.5.
The glibc implementation allows a complete reset of the environment,
including re-checking for @env{POSIXLY_CORRECT}, by setting
@code{optind} to 0. Other implementations provide @code{optreset},
causing a reset by setting it non-zero, although it does not
necessarily re-read @env{POSIXLY_CORRECT}.
@end itemize

25
doc/glibc-functions/getopt_long_only.texi
View File

@@ -2,15 +2,34 @@
@subsection @code{getopt_long_only}
@findex getopt_long_only
Gnulib module: ---
Gnulib module: getopt-gnu
Portability problems fixed by Gnulib:
@itemize
@item
The function @code{getopt_long_only} does not support the @samp{+}
flag in the options string on some platforms:
MacOS X 10.5, AIX 5.2, OSF/1 5.1, Solaris 10.
@item
The function @code{getopt_long_only} does not obey the @samp{-} flag
in the options string when @env{POSIXLY_CORRECT} is set on some platforms:
Cygwin 1.7.0.
@item
The function @code{getopt_long_only} does not support options with
optional arguments on some platforms:
MacOS X 10.5, OpenBSD 4.0, AIX 5.2, Solaris 10, Cygwin 1.5.x.
@item
This function is missing on some platforms:
MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, AIX 5.1, HP-UX 11, IRIX 6.5,
OSF/1 5.1, mingw, Interix 3.5.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
MacOS X 10.3, FreeBSD 5.2.1, NetBSD 3.0, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, mingw, Interix 3.5.
The glibc implementation allows a complete reset of the environment,
including re-checking for @env{POSIXLY_CORRECT}, by setting
@code{optind} to 0. Other implementations provide @code{optreset},
causing a reset by setting it non-zero, although it does not
necessarily re-read @env{POSIXLY_CORRECT}.
@end itemize