mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2025-08-17 12:41:05 +03:00
e8eabe5a3d
* doc/{glibc,posix}-{functions,headers}: Add info about Solaris 11
Express, released in November 2010.
71 lines
2.7 KiB
Plaintext
71 lines
2.7 KiB
Plaintext
@node getopt
|
|
@section @code{getopt}
|
|
@findex getopt
|
|
|
|
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/getopt.html}
|
|
|
|
Gnulib module: getopt-posix or getopt-gnu
|
|
|
|
The module @code{getopt-gnu} has support for ``long options'' and for
|
|
``options that take optional arguments''. Compared to the API defined by POSIX,
|
|
it adds a header file @code{<getopt.h>} and a function @code{getopt_long}.
|
|
|
|
Portability problems fixed by either Gnulib module @code{getopt-posix} or @code{getopt-gnu}:
|
|
@itemize
|
|
@item
|
|
The @code{getopt} function keeps some internal state that cannot be explicitly
|
|
reset on some platforms:
|
|
mingw.
|
|
@item
|
|
The value of @code{optind} after a missing required argument is wrong
|
|
on some platforms:
|
|
MacOS 10.5, AIX 7.1.
|
|
@end itemize
|
|
|
|
Portability problems fixed by Gnulib module @code{getopt-gnu}:
|
|
@itemize
|
|
@item
|
|
The function @code{getopt} does not support the @samp{+} flag in the options
|
|
string on some platforms:
|
|
MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11.
|
|
@item
|
|
The function @code{getopt} does not obey the combination of @samp{+}
|
|
and @samp{:} flags in the options string on some platforms:
|
|
glibc 2.11.
|
|
@item
|
|
The function @code{getopt} 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} does not support options with optional arguments
|
|
on some platforms:
|
|
MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11, IRIX 6.5, OSF/1 5.1,
|
|
Solaris 11 2010-11, Cygwin 1.5.x.
|
|
@item
|
|
The function @code{getopt_long} is missing on some platforms:
|
|
AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, Interix 3.5.
|
|
@item
|
|
The function @code{getopt_long_only} is missing on some platforms:
|
|
MacOS X 10.3, FreeBSD 5.2.1, NetBSD 5.0, AIX 5.1, HP-UX 11, IRIX 6.5,
|
|
OSF/1 5.1, Solaris 9, mingw, Interix 3.5.
|
|
@end itemize
|
|
|
|
Portability problems not fixed by Gnulib:
|
|
@itemize
|
|
@item
|
|
The default behavior of the glibc implementation of @code{getopt} allows
|
|
mixing option and non-option arguments on the command line in any order.
|
|
Other implementations, such as the one in Cygwin, enforce strict POSIX
|
|
compliance: they require that the option arguments precede the non-option
|
|
arguments. This is something to watch out in your program's
|
|
testsuite.
|
|
@item
|
|
The glibc implementation allows a complete reset of the environment,
|
|
including re-checking for @env{POSIXLY_CORRECT}, by setting
|
|
@code{optind} to 0. Several BSD implementations provide @code{optreset},
|
|
causing a reset by setting it non-zero, although it does not
|
|
necessarily re-read @env{POSIXLY_CORRECT}. Solaris @code{getopt} does
|
|
not support either reset method, but does not maintain state that
|
|
needs the extra level of reset.
|
|
@end itemize
|