Add getopt_long(3).

Obtained from:	NetBSD
Sponsored by:	Apple

3 files changed, 771 insertions, 2 deletions

diff --git a/lib/libc/stdlib/Makefile.inc b/lib/libc/stdlib/Makefile.inc
index 69b206a..a65ef1e 100644
--- a/lib/libc/stdlib/Makefile.inc
+++ b/lib/libc/stdlib/Makefile.inc
@@ -5,7 +5,7 @@
 .PATH: ${.CURDIR}/../libc/${MACHINE_ARCH}/stdlib ${.CURDIR}/../libc/stdlib
 
 MISRCS+=_Exit.c abort.c abs.c atexit.c atof.c atoi.c atol.c atoll.c \
-	bsearch.c calloc.c div.c exit.c getenv.c getopt.c \
+	bsearch.c calloc.c div.c exit.c getenv.c getopt.c getopt_long.c \
 	getsubopt.c hcreate.c heapsort.c imaxabs.c imaxdiv.c \
 	labs.c ldiv.c llabs.c lldiv.c malloc.c merge.c putenv.c \
 	qsort.c qsort_r.c radixsort.c rand.c random.c reallocf.c realpath.c \
@@ -20,7 +20,7 @@ MISRCS+=_Exit.c abort.c abs.c atexit.c atof.c atoi.c atol.c atoll.c \
 
 .if ${LIB} == "c"
 MAN+=	abort.3 abs.3 alloca.3 atexit.3 atof.3 atoi.3 atol.3 bsearch.3 \
-	div.3 exit.3 getenv.3 getopt.3 getsubopt.3 hcreate.3 \
+	div.3 exit.3 getenv.3 getopt.3 getopt_long.3 getsubopt.3 hcreate.3 \
 	imaxabs.3 imaxdiv.3 labs.3 ldiv.3 llabs.3 lldiv.3 \
 	malloc.3 memory.3 qsort.3 radixsort.3 rand.3 random.3 \
 	realpath.3 strfmon.3 strtod.3 strtol.3 strtoul.3 system.3 tsearch.3
diff --git a/lib/libc/stdlib/getopt_long.3 b/lib/libc/stdlib/getopt_long.3
new file mode 100644
index 0000000..869dd1e
--- /dev/null
+++ b/lib/libc/stdlib/getopt_long.3
@@ -0,0 +1,275 @@
+.\"	$NetBSD: getopt_long.3,v 1.8 2002/06/03 12:01:43 wiz Exp $
+.\"	$FreeBSD$
+.\"
+.\" Copyright (c) 1988, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)getopt.3	8.5 (Berkeley) 4/27/95
+.\"
+.Dd April 1, 2000
+.Dt GETOPT_LONG 3
+.Os
+.Sh NAME
+.Nm getopt_long
+.Nd get long options from command line argument list
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.Fd #include \*[Lt]getopt.h\*[Gt]
+.Ft int
+.Fn getopt_long "int argc" "char * const *argv" "const char *optstring" "struct option *long options" "int *index"
+.Sh DESCRIPTION
+The
+.Fn getopt_long
+function is similar to
+.Xr getopt 3
+but it accepts options in two forms: words and characters. The
+.Fn getopt_long
+function provides a superset of of the functionality of
+.Xr getopt 3 .
+.Fn getopt_long
+can be used in two ways. In the first way, every long option understood
+by the program has a corresponding short option, and the option
+structure is only used to translate from long options to short
+options. When used in this fashion,
+.Fn getopt_long
+behaves identically to
+.Xr getopt 3 .
+This is a good way to add long option processing to an existing program
+with the minimum of rewriting.
+.Pp
+In the second mechanism, a long option sets a flag in the
+.Fa option
+structure passed, or will store a pointer to the command line argument
+in the
+.Fa option
+structure passed to it for options that take arguments. Additionally,
+the long option's argument may be specified as a single argument with
+an equal sign, e.g.
+.Bd -literal
+myprogram --myoption=somevalue
+.Ed
+.Pp
+When a long option is processed the call to
+.Fn getopt_long
+will return 0. For this reason, long option processing without
+shortcuts is not backwards compatible with
+.Xr getopt 3 .
+.Pp
+It is possible to combine these methods, providing for long options
+processing with short option equivalents for some options. Less
+frequently used options would be processed as long options only.
+.Pp
+The
+.Fn getopt_long
+call requires a structure to be initialized describing the long
+options. The structure is:
+.Bd -literal
+struct option {
+	char *name;
+	int has_arg;
+	int *flag;
+	int val;
+};
+.Ed
+.Pp
+The
+.Fa name
+field should contain the option name without the leading double dash.
+.Pp
+The
+.Fa has_arg
+field should be one of:
+.Bl -tag -width "optional_argument"
+.It Li no_argument
+no argument to the option is expect.
+.It Li required_argument
+an argument to the option is required.
+.It Li optional_argument
+an argument to the option may be presented.
+.El
+.Pp
+If
+.Fa flag
+is non-NULL, then the integer pointed to by it will be set to the
+value in the
+.Fa val
+field. If the
+.Fa flag
+field is NULL, then the
+.Fa val
+field will be returned. Setting
+.Fa flag
+to NULL and setting
+.Fa val
+to the corresponding short option will make this function act just
+like
+.Xr getopt 3 .
+.Sh EXAMPLES
+.Bd -literal -compact
+extern char *optarg;
+extern int optind;
+int bflag, ch, fd;
+int daggerset;
+
+/* options descriptor */
+static struct option longopts[] = {
+	{ "buffy",	no_argument,		0, 		'b' },
+	{ "floride",	required_argument,	0, 	       	'f' },
+	{ "daggerset",	no_argument,		\*[Am]daggerset,	1 },
+	{ 0, 		0,			0, 		0 }
+};
+
+bflag = 0;
+while ((ch = getopt_long(argc, argv, "bf:", longopts, NULL)) != -1)
+	switch(ch) {
+	case 'b':
+		bflag = 1;
+		break;
+	case 'f':
+		if ((fd = open(optarg, O_RDONLY, 0)) \*[Lt] 0) {
+			(void)fprintf(stderr,
+			    "myname: %s: %s\en", optarg, strerror(errno));
+			exit(1);
+		}
+		break;
+	case 0:
+		if(daggerset) {
+			fprintf(stderr,"Buffy will use her dagger to "
+				       "apply floride to dracula's teeth\en");
+		}
+		break;
+	case '?':
+	default:
+		usage();
+}
+argc -= optind;
+argv += optind;
+.Ed
+.Sh IMPLEMENTATION DIFFERENCES
+This section describes differences to the GNU implementation
+found in glibc-2.1.3:
+.Bl -tag -width "xxx"
+.It Li o
+handling of - as first char of option string in presence of
+environment variable POSIXLY_CORRECT:
+.Bl -tag -width "NetBSD"
+.It Li GNU
+ignores POSIXLY_CORRECT and returns non-options as
+arguments to option '\e1'.
+.It Li NetBSD
+honors POSIXLY_CORRECT and stops at the first non-option.
+.El
+.It Li o
+handling of :: in options string in presence of POSIXLY_CORRECT:
+.Bl -tag -width "NetBSD"
+.It Li Both
+GNU and NetBSD ignore POSIXLY_CORRECT here and take :: to
+mean the preceding option takes an optional argument.
+.El
+.It Li o
+return value in case of missing argument if first character
+(after + or -) in option string is not ':':
+.Bl -tag -width "NetBSD"
+.It Li GNU
+returns '?'
+.It NetBSD
+returns ':' (since NetBSD's getopt does).
+.El
+.It Li o
+handling of --a in getopt:
+.Bl -tag -width "NetBSD"
+.It Li GNU
+parses this as option '-', option 'a'.
+.It Li NetBSD
+parses this as '--', and returns -1 (ignoring the a).  (Because
+the original getopt does.)
+.El
+.It Li o
+setting of optopt for long options with flag != NULL:
+.Bl -tag -width "NetBSD"
+.It Li GNU
+sets optopt to val.
+.It Li NetBSD
+sets optopt to 0 (since val would never be returned).
+.El
+.It Li o
+handling of -W with W; in option string in getopt (not getopt_long):
+.Bl -tag -width "NetBSD"
+.It Li GNU
+causes a segfault.
+.It Li NetBSD
+returns -1, with optind pointing past the argument of -W
+(as if `-W arg' were `--arg', and thus '--' had been found).
+.\" How should we treat W; in the option string when called via
+.\" getopt?  Ignore the ';' or treat it as a ':'? Issue a warning?
+.El
+.It Li o
+setting of optarg for long options without an argument that are
+invoked via -W (W; in option string):
+.Bl -tag -width "NetBSD"
+.It Li GNU
+sets optarg to the option name (the argument of -W).
+.It Li NetBSD
+sets optarg to NULL (the argument of the long option).
+.El
+.It Li o
+handling of -W with an argument that is not (a prefix to) a known
+long option (W; in option string):
+.Bl -tag -width "NetBSD"
+.It Li GNU
+returns -W with optarg set to the unknown option.
+.It Li NetBSD
+treats this as an error (unknown option) and returns '?' with
+optopt set to 0 and optarg set to NULL (as GNU's man page
+documents).
+.El
+.It Li o
+The error messages are different.
+.It Li o
+NetBSD does not permute the argument vector at the same points in
+the calling sequence as GNU does.  The aspects normally used by
+the caller (ordering after -1 is returned, value of optind relative
+to current positions) are the same, though.  (We do fewer variable
+swaps.)
+.El
+.Sh SEE ALSO
+.Xr getopt 3
+.Sh HISTORY
+The
+.Fn getopt_long
+function first appeared in GNU libiberty. The first
+.Nx
+implementation appeared in 1.5.
+.Sh BUGS
+The implementation, can completelely replace
+.Xr getopt 3 ,
+but right now we are using separate code.
diff --git a/lib/libc/stdlib/getopt_long.c b/lib/libc/stdlib/getopt_long.c
new file mode 100644
index 0000000..acf002b
--- /dev/null
+++ b/lib/libc/stdlib/getopt_long.c
@@ -0,0 +1,494 @@
+/*	$NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $	*/
+/*	$FreeBSD$ */
+
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $");
+#endif /* LIBC_SCCS and not lint */
+
+#include "namespace.h"
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* not part of the original file */
+#ifndef _DIAGASSERT
+#define _DIAGASSERT(X)
+#endif
+
+#if HAVE_CONFIG_H && !HAVE_GETOPT_LONG && !HAVE_DECL_OPTIND
+#define REPLACE_GETOPT
+#endif
+
+#ifdef REPLACE_GETOPT
+#ifdef __weak_alias
+__weak_alias(getopt,_getopt)
+#endif
+int	opterr = 1;		/* if error message should be printed */
+int	optind = 1;		/* index into parent argv vector */
+int	optopt = '?';		/* character checked for validity */
+int	optreset;		/* reset getopt */
+char    *optarg;		/* argument associated with option */
+#elif HAVE_CONFIG_H && !HAVE_DECL_OPTRESET
+static int optreset;
+#endif
+
+#ifdef __weak_alias
+__weak_alias(getopt_long,_getopt_long)
+#endif
+
+#if !HAVE_GETOPT_LONG
+#define IGNORE_FIRST	(*options == '-' || *options == '+')
+#define PRINT_ERROR	((opterr) && ((*options != ':') \
+				      || (IGNORE_FIRST && options[1] != ':')))
+#define IS_POSIXLY_CORRECT (getenv("POSIXLY_CORRECT") != NULL)
+#define PERMUTE         (!IS_POSIXLY_CORRECT && !IGNORE_FIRST)
+/* XXX: GNU ignores PC if *options == '-' */
+#define IN_ORDER        (!IS_POSIXLY_CORRECT && *options == '-')
+
+/* return values */
+#define	BADCH	(int)'?'
+#define	BADARG		((IGNORE_FIRST && options[1] == ':') \
+			 || (*options == ':') ? (int)':' : (int)'?')
+#define INORDER (int)1
+
+#define	EMSG	""
+
+static int getopt_internal __P((int, char * const *, const char *));
+static int gcd __P((int, int));
+static void permute_args __P((int, int, int, char * const *));
+
+static char *place = EMSG; /* option letter processing */
+
+/* XXX: set optreset to 1 rather than these two */
+static int nonopt_start = -1; /* first non option argument (for permute) */
+static int nonopt_end = -1;   /* first option after non options (for permute) */
+
+/* Error messages */
+static const char recargchar[] = "option requires an argument -- %c";
+static const char recargstring[] = "option requires an argument -- %s";
+static const char ambig[] = "ambiguous option -- %.*s";
+static const char noarg[] = "option doesn't take an argument -- %.*s";
+static const char illoptchar[] = "unknown option -- %c";
+static const char illoptstring[] = "unknown option -- %s";
+
+
+/*
+ * Compute the greatest common divisor of a and b.
+ */
+static int
+gcd(a, b)
+	int a;
+	int b;
+{
+	int c;
+
+	c = a % b;
+	while (c != 0) {
+		a = b;
+		b = c;
+		c = a % b;
+	}
+	   
+	return b;
+}
+
+/*
+ * Exchange the block from nonopt_start to nonopt_end with the block
+ * from nonopt_end to opt_end (keeping the same order of arguments
+ * in each block).
+ */
+static void
+permute_args(panonopt_start, panonopt_end, opt_end, nargv)
+	int panonopt_start;
+	int panonopt_end;
+	int opt_end;
+	char * const *nargv;
+{
+	int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
+	char *swap;
+
+	_DIAGASSERT(nargv != NULL);
+
+	/*
+	 * compute lengths of blocks and number and size of cycles
+	 */
+	nnonopts = panonopt_end - panonopt_start;
+	nopts = opt_end - panonopt_end;
+	ncycle = gcd(nnonopts, nopts);
+	cyclelen = (opt_end - panonopt_start) / ncycle;
+
+	for (i = 0; i < ncycle; i++) {
+		cstart = panonopt_end+i;
+		pos = cstart;
+		for (j = 0; j < cyclelen; j++) {
+			if (pos >= panonopt_end)
+				pos -= nnonopts;
+			else
+				pos += nopts;
+			swap = nargv[pos];
+			/* LINTED const cast */
+			((char **) nargv)[pos] = nargv[cstart];
+			/* LINTED const cast */
+			((char **)nargv)[cstart] = swap;
+		}
+	}
+}
+
+/*
+ * getopt_internal --
+ *	Parse argc/argv argument vector.  Called by user level routines.
+ *  Returns -2 if -- is found (can be long option or end of options marker).
+ */
+static int
+getopt_internal(nargc, nargv, options)
+	int nargc;
+	char * const *nargv;
+	const char *options;
+{
+	char *oli;				/* option letter list index */
+	int optchar;
+
+	_DIAGASSERT(nargv != NULL);
+	_DIAGASSERT(options != NULL);
+
+	optarg = NULL;
+
+	/*
+	 * XXX Some programs (like rsyncd) expect to be able to
+	 * XXX re-initialize optind to 0 and have getopt_long(3)
+	 * XXX properly function again.  Work around this braindamage.
+	 */
+	if (optind == 0)
+		optind = 1;
+
+	if (optreset)
+		nonopt_start = nonopt_end = -1;
+start:
+	if (optreset || !*place) {		/* update scanning pointer */
+		optreset = 0;
+		if (optind >= nargc) {          /* end of argument vector */
+			place = EMSG;
+			if (nonopt_end != -1) {
+				/* do permutation, if we have to */
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				optind -= nonopt_end - nonopt_start;
+			}
+			else if (nonopt_start != -1) {
+				/*
+				 * If we skipped non-options, set optind
+				 * to the first of them.
+				 */
+				optind = nonopt_start;
+			}
+			nonopt_start = nonopt_end = -1;
+			return -1;
+		}
+		if ((*(place = nargv[optind]) != '-')
+		    || (place[1] == '\0')) {    /* found non-option */
+			place = EMSG;
+			if (IN_ORDER) {
+				/*
+				 * GNU extension: 
+				 * return non-option as argument to option 1
+				 */
+				optarg = nargv[optind++];
+				return INORDER;
+			}
+			if (!PERMUTE) {
+				/*
+				 * if no permutation wanted, stop parsing
+				 * at first non-option
+				 */
+				return -1;
+			}
+			/* do permutation */
+			if (nonopt_start == -1)
+				nonopt_start = optind;
+			else if (nonopt_end != -1) {
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				nonopt_start = optind -
+				    (nonopt_end - nonopt_start);
+				nonopt_end = -1;
+			}
+			optind++;
+			/* process next argument */
+			goto start;
+		}
+		if (nonopt_start != -1 && nonopt_end == -1)
+			nonopt_end = optind;
+		if (place[1] && *++place == '-') {	/* found "--" */
+			place++;
+			return -2;
+		}
+	}
+	if ((optchar = (int)*place++) == (int)':' ||
+	    (oli = strchr(options + (IGNORE_FIRST ? 1 : 0), optchar)) == NULL) {
+		/* option letter unknown or ':' */
+		if (!*place)
+			++optind;
+		if (PRINT_ERROR)
+			warnx(illoptchar, optchar);
+		optopt = optchar;
+		return BADCH;
+	}
+	if (optchar == 'W' && oli[1] == ';') {		/* -W long-option */
+		/* XXX: what if no long options provided (called by getopt)? */
+		if (*place) 
+			return -2;
+
+		if (++optind >= nargc) {	/* no arg */
+			place = EMSG;
+			if (PRINT_ERROR)
+				warnx(recargchar, optchar);
+			optopt = optchar;
+			return BADARG;
+		} else				/* white space */
+			place = nargv[optind];
+		/*
+		 * Handle -W arg the same as --arg (which causes getopt to
+		 * stop parsing).
+		 */
+		return -2;
+	}
+	if (*++oli != ':') {			/* doesn't take argument */
+		if (!*place)
+			++optind;
+	} else {				/* takes (optional) argument */
+		optarg = NULL;
+		if (*place)			/* no white space */
+			optarg = place;
+		/* XXX: disable test for :: if PC? (GNU doesn't) */
+		else if (oli[1] != ':') {	/* arg not optional */
+			if (++optind >= nargc) {	/* no arg */
+				place = EMSG;
+				if (PRINT_ERROR)
+					warnx(recargchar, optchar);
+				optopt = optchar;
+				return BADARG;
+			} else
+				optarg = nargv[optind];
+		}
+		place = EMSG;
+		++optind;
+	}
+	/* dump back option letter */
+	return optchar;
+}
+
+#ifdef REPLACE_GETOPT
+/*
+ * getopt --
+ *	Parse argc/argv argument vector.
+ *
+ * [eventually this will replace the real getopt]
+ */
+int
+getopt(nargc, nargv, options)
+	int nargc;
+	char * const *nargv;
+	const char *options;
+{
+	int retval;
+
+	_DIAGASSERT(nargv != NULL);
+	_DIAGASSERT(options != NULL);
+
+	if ((retval = getopt_internal(nargc, nargv, options)) == -2) {
+		++optind;
+		/*
+		 * We found an option (--), so if we skipped non-options,
+		 * we have to permute.
+		 */
+		if (nonopt_end != -1) {
+			permute_args(nonopt_start, nonopt_end, optind,
+				       nargv);
+			optind -= nonopt_end - nonopt_start;
+		}
+		nonopt_start = nonopt_end = -1;
+		retval = -1;
+	}
+	return retval;
+}
+#endif
+
+/*
+ * getopt_long --
+ *	Parse argc/argv argument vector.
+ */
+int
+getopt_long(nargc, nargv, options, long_options, idx)
+	int nargc;
+	char * const *nargv;
+	const char *options;
+	const struct option *long_options;
+	int *idx;
+{
+	int retval;
+
+	_DIAGASSERT(nargv != NULL);
+	_DIAGASSERT(options != NULL);
+	_DIAGASSERT(long_options != NULL);
+	/* idx may be NULL */
+
+	if ((retval = getopt_internal(nargc, nargv, options)) == -2) {
+		char *current_argv, *has_equal;
+		size_t current_argv_len;
+		int i, match;
+
+		current_argv = place;
+		match = -1;
+
+		optind++;
+		place = EMSG;
+
+		if (*current_argv == '\0') {		/* found "--" */
+			/*
+			 * We found an option (--), so if we skipped
+			 * non-options, we have to permute.
+			 */
+			if (nonopt_end != -1) {
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				optind -= nonopt_end - nonopt_start;
+			}
+			nonopt_start = nonopt_end = -1;
+			return -1;
+		}
+		if ((has_equal = strchr(current_argv, '=')) != NULL) {
+			/* argument found (--option=arg) */
+			current_argv_len = has_equal - current_argv;
+			has_equal++;
+		} else
+			current_argv_len = strlen(current_argv);
+	    
+		for (i = 0; long_options[i].name; i++) {
+			/* find matching long option */
+			if (strncmp(current_argv, long_options[i].name,
+			    current_argv_len))
+				continue;
+
+			if (strlen(long_options[i].name) ==
+			    (unsigned)current_argv_len) {
+				/* exact match */
+				match = i;
+				break;
+			}
+			if (match == -1)		/* partial match */
+				match = i;
+			else {
+				/* ambiguous abbreviation */
+				if (PRINT_ERROR)
+					warnx(ambig, (int)current_argv_len,
+					     current_argv);
+				optopt = 0;
+				return BADCH;
+			}
+		}
+		if (match != -1) {			/* option found */
+		        if (long_options[match].has_arg == no_argument
+			    && has_equal) {
+				if (PRINT_ERROR)
+					warnx(noarg, (int)current_argv_len,
+					     current_argv);
+				/*
+				 * XXX: GNU sets optopt to val regardless of
+				 * flag
+				 */
+				if (long_options[match].flag == NULL)
+					optopt = long_options[match].val;
+				else
+					optopt = 0;
+				return BADARG;
+			}
+			if (long_options[match].has_arg == required_argument ||
+			    long_options[match].has_arg == optional_argument) {
+				if (has_equal)
+					optarg = has_equal;
+				else if (long_options[match].has_arg ==
+				    required_argument) {
+					/*
+					 * optional argument doesn't use
+					 * next nargv
+					 */
+					optarg = nargv[optind++];
+				}
+			}
+			if ((long_options[match].has_arg == required_argument)
+			    && (optarg == NULL)) {
+				/*
+				 * Missing argument; leading ':'
+				 * indicates no error should be generated
+				 */
+				if (PRINT_ERROR)
+					warnx(recargstring, current_argv);
+				/*
+				 * XXX: GNU sets optopt to val regardless
+				 * of flag
+				 */
+				if (long_options[match].flag == NULL)
+					optopt = long_options[match].val;
+				else
+					optopt = 0;
+				--optind;
+				return BADARG;
+			}
+		} else {			/* unknown option */
+			if (PRINT_ERROR)
+				warnx(illoptstring, current_argv);
+			optopt = 0;
+			return BADCH;
+		}
+		if (long_options[match].flag) {
+			*long_options[match].flag = long_options[match].val;
+			retval = 0;
+		} else 
+			retval = long_options[match].val;
+		if (idx)
+			*idx = match;
+	}
+	return retval;
+}
+#endif /* !GETOPT_LONG */