Date: Wed, 20 Oct 1999 22:10:08 +0200 From: Jeroen Ruigrok/Asmodai <asmodai@wxs.nl> To: hackers@freebsd.org Cc: Bill Fumerola <billf@freebsd.org>, Bruce Evans <bde@freebsd.org> Subject: getopt.h Message-ID: <19991020221007.A90211@daemon.ninth-circle.org>
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Well I searched the mailinglists and didn't really got further than
discovering that unistd.h goes a little way to provide functionality
which getopt.h from glibc provides. And seeing that a question of Bill
early 1999 never got answered correctly. I cc:'d Bruce on this since I
value his stylistic mindset on this issue.
I am starting on this topic since I need to port the source of an
application and I found the support of some part of getopt.h and lack of
support for the other part a kind of an oddity in the source tree.
That, plus a lot of our ports depend on it. And it would be a waste for
using ports/devel/libgnugetopt when the solution is pretty small.
In unistd.h we have definitions for getopt, optarg, optind, opterr, and
optopt.
However this means we still have this to worry about:
[hacked up version of linux/glibc/posix/getopt.h]
#if !defined __GNU_LIBRARY__
#include <ctype.h>
#endif
struct option
{
#if defined __STDC__ && __STDC__
const char *name;
#else
char *name;
#endif
int has_arg;
int *flag;
int val;
};
#define no_argument 0
#define required_argument 1
#define optional_argument 2
#if defined __STDC__ && __STDC__
extern int getopt_long (int __argc, char *const *__argv, const char *__shortopts,
const struct option *__longopts, int *__longind);
extern int getopt_long_only (int __argc, char *const *__argv,
const char *__shortopts,
const struct option *__longopts, int *__longind);
extern int _getopt_internal (int __argc, char *const *__argv,
const char *__shortopts,
const struct option *__longopts, int *__longind,
int __long_only);
#endif /* __STDC__ */
I think the above inclusion of ctype.h can be forgotten about when we
include sys/types.h and sys/cdefs.h such as unistd.h does. So that
effectively leaves us with one struct, three defines and three
functions.
The things I propose to add to unistd.h are the following:
struct option
{
char *name;
int has_arg;
int *flag;
int val;
};
#define no_argument 0
#define required_argument 1
#define optional_argument 2
extern int getopt_long (int, char *const [], const char *,
const struct option *, int *);
extern int getopt_long_only (int, char *const [], const char *,
const struct option *, int *);
extern int _getopt_internal (int, char *const [], const char *,
const struct option *, int *, int );
This should enable us to compile programs which require getopt.h by
simply including unistd.h.
I would like to hear any constructive comments on this. Mostly on the
three #define's.
regards,
--
Jeroen Ruigrok van der Werven/Asmodai asmodai(at)wxs.nl
The BSD Programmer's Documentation Project <http://home.wxs.nl/~asmodai>;
Network/Security Specialist BSD: Technical excellence at its best
For country, children, hearth, and home.
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