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GNU-like getopt_long() from NetBSD with changes by me to support 

getopt_long_only().  At some point this should replace the BSD
getopt(3) but we are not there yet.
While I am here add protection from the multiple getopt() definitions
due to conflicting standards.
OPENBSD_3_3
millert 22 years ago
parent
d0d1ec3e7f
commit
52c5998342
6 changed files with 938 additions and 10 deletions
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  1. +85
    -0
      src/include/getopt.h
  2. +4
    -1
      src/include/stdlib.h
  3. +4
    -1
      src/include/unistd.h
  4. +9
    -8
      src/lib/libc/stdlib/Makefile.inc
  5. +326
    -0
      src/lib/libc/stdlib/getopt_long.3
  6. +510
    -0
      src/lib/libc/stdlib/getopt_long.c

+ 85
- 0
src/include/getopt.h View File

@ -0,0 +1,85 @@
/* $OpenBSD: getopt.h,v 1.1 2002/12/03 20:24:29 millert Exp $ */
/* $NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $ */
/*-
* 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.
*/
#ifndef _GETOPT_H_
#define _GETOPT_H_
#include <sys/cdefs.h>
/*
* GNU-like getopt_long() and 4.4BSD getsubopt()/optreset extensions
*/
#define no_argument 0
#define required_argument 1
#define optional_argument 2
struct option {
/* name of long option */
const char *name;
/*
* one of no_argument, required_argument, and optional_argument:
* whether option takes an argument
*/
int has_arg;
/* if not NULL, set *flag to val when option found */
int *flag;
/* if flag not NULL, value to set *flag to; else return value */
int val;
};
__BEGIN_DECLS
int getopt_long(int, char * const *, const char *,
const struct option *, int *);
int getopt_long_only(int, char * const *, const char *,
const struct option *, int *);
#ifndef _GETOPT_DEFINED_
#define _GETOPT_DEFINED_
int getopt(int, char * const *, const char *);
int getsubopt(char **, char * const *, char **);
extern char *optarg; /* getopt(3) external variables */
extern int opterr;
extern int optind;
extern int optopt;
extern int optreset;
extern char *suboptarg; /* getsubopt(3) external variable */
#endif
__END_DECLS
#endif /* !_GETOPT_H_ */

+ 4
- 1
src/include/stdlib.h View File

@ -1,4 +1,4 @@
/* $OpenBSD: stdlib.h,v 1.23 2002/12/02 15:38:54 millert Exp $ */
/* $OpenBSD: stdlib.h,v 1.24 2002/12/03 20:24:29 millert Exp $ */
/* $NetBSD: stdlib.h,v 1.25 1995/12/27 21:19:08 jtc Exp $ */ /* $NetBSD: stdlib.h,v 1.25 1995/12/27 21:19:08 jtc Exp $ */
/*- /*-
@ -173,6 +173,8 @@ char *l64a(long);
void cfree(void *); void cfree(void *);
#ifndef _GETOPT_DEFINED_
#define _GETOPT_DEFINED_
int getopt(int, char * const *, const char *); int getopt(int, char * const *, const char *);
extern char *optarg; /* getopt(3) external variables */ extern char *optarg; /* getopt(3) external variables */
extern int opterr; extern int opterr;
@ -181,6 +183,7 @@ extern int optopt;
extern int optreset; extern int optreset;
int getsubopt(char **, char * const *, char **); int getsubopt(char **, char * const *, char **);
extern char *suboptarg; /* getsubopt(3) external variable */ extern char *suboptarg; /* getsubopt(3) external variable */
#endif /* _GETOPT_DEFINED_ */
int heapsort(void *, size_t, size_t, int (*)(const void *, const void *)); int heapsort(void *, size_t, size_t, int (*)(const void *, const void *));
int mergesort(void *, size_t, size_t, int (*)(const void *, const void *)); int mergesort(void *, size_t, size_t, int (*)(const void *, const void *));


+ 4
- 1
src/include/unistd.h View File

@ -1,4 +1,4 @@
/* $OpenBSD: unistd.h,v 1.44 2002/10/30 20:15:29 millert Exp $ */
/* $OpenBSD: unistd.h,v 1.45 2002/12/03 20:24:29 millert Exp $ */
/* $NetBSD: unistd.h,v 1.26.4.1 1996/05/28 02:31:51 mrg Exp $ */ /* $NetBSD: unistd.h,v 1.26.4.1 1996/05/28 02:31:51 mrg Exp $ */
/*- /*-
@ -219,6 +219,8 @@ void *valloc(size_t); /* obsoleted by malloc() */
pid_t vfork(void); pid_t vfork(void);
int issetugid(void); int issetugid(void);
#ifndef _GETOPT_DEFINED_
#define _GETOPT_DEFINED_
int getopt(int, char * const *, const char *); int getopt(int, char * const *, const char *);
extern char *optarg; /* getopt(3) external variables */ extern char *optarg; /* getopt(3) external variables */
extern int opterr; extern int opterr;
@ -227,6 +229,7 @@ extern int optopt;
extern int optreset; extern int optreset;
int getsubopt(char **, char * const *, char **); int getsubopt(char **, char * const *, char **);
extern char *suboptarg; /* getsubopt(3) external variable */ extern char *suboptarg; /* getsubopt(3) external variable */
#endif /* _GETOPT_DEFINED_ */
#endif /* !_POSIX_SOURCE */ #endif /* !_POSIX_SOURCE */
#if (!defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) && \ #if (!defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) && \


+ 9
- 8
src/lib/libc/stdlib/Makefile.inc View File

@ -4,10 +4,10 @@
.PATH: ${LIBCSRCDIR}/arch/${MACHINE_ARCH}/stdlib ${LIBCSRCDIR}/stdlib .PATH: ${LIBCSRCDIR}/arch/${MACHINE_ARCH}/stdlib ${LIBCSRCDIR}/stdlib
SRCS+= a64l.c abort.c atexit.c atoi.c atof.c atol.c atoll.c bsearch.c \ SRCS+= a64l.c abort.c atexit.c atoi.c atof.c atol.c atoll.c bsearch.c \
calloc.c cfree.c exit.c ecvt.c gcvt.c getenv.c getopt.c getsubopt.c \
heapsort.c l64a.c malloc.c merge.c multibyte.c putenv.c qsort.c \
radixsort.c rand.c random.c realpath.c setenv.c strtod.c strtol.c \
strtoll.c strtoul.c strtoull.c system.c tfind.c tsearch.c \
calloc.c cfree.c exit.c ecvt.c gcvt.c getenv.c getopt.c getopt_long.c \
getsubopt.c heapsort.c l64a.c malloc.c merge.c multibyte.c putenv.c =
qsort.c radixsort.c rand.c random.c realpath.c setenv.c strtod.c \
strtol.c strtoll.c strtoul.c strtoull.c system.c tfind.c tsearch.c \
_rand48.c drand48.c erand48.c jrand48.c lcong48.c lrand48.c \ _rand48.c drand48.c erand48.c jrand48.c lcong48.c lrand48.c \
mrand48.c nrand48.c seed48.c srand48.c qabs.c qdiv.c mrand48.c nrand48.c seed48.c srand48.c qabs.c qdiv.c
@ -33,13 +33,14 @@ SRCS+= abs.c div.c labs.c ldiv.c
.endif .endif
MAN+= a64l.3 abort.3 abs.3 alloca.3 atexit.3 atof.3 atoi.3 atol.3 atoll.3 \ MAN+= a64l.3 abort.3 abs.3 alloca.3 atexit.3 atof.3 atoi.3 atol.3 atoll.3 \
bsearch.3 div.3 ecvt.3 exit.3 getenv.3 getopt.3 getsubopt.3 labs.3 \
ldiv.3 malloc.3 memory.3 qabs.3 qdiv.3 qsort.3 radixsort.3 rand48.3 \
rand.3 random.3 realpath.3 strtod.3 strtol.3 strtoul.3 system.3 \
tsearch.3
bsearch.3 div.3 ecvt.3 exit.3 getenv.3 getopt.3 getopt_long.3 \
getsubopt.3 labs.3 ldiv.3 malloc.3 memory.3 qabs.3 qdiv.3 qsort.3 \
radixsort.3 rand48.3 rand.3 random.3 realpath.3 strtod.3 strtol.3 \
strtoul.3 system.3 tsearch.3
MLINKS+=ecvt.3 fcvt.3 ecvt.3 gcvt.3 MLINKS+=ecvt.3 fcvt.3 ecvt.3 gcvt.3
MLINKS+=getenv.3 setenv.3 getenv.3 unsetenv.3 getenv.3 putenv.3 MLINKS+=getenv.3 setenv.3 getenv.3 unsetenv.3 getenv.3 putenv.3
MLINKS+=getopt_long.3 getopt_long_only.3
MLINKS+=malloc.3 free.3 malloc.3 realloc.3 malloc.3 calloc.3 MLINKS+=malloc.3 free.3 malloc.3 realloc.3 malloc.3 calloc.3
MLINKS+=malloc.3 cfree.3 malloc.3 malloc.conf.5 MLINKS+=malloc.3 cfree.3 malloc.3 malloc.conf.5
MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3 MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3


+ 326
- 0
src/lib/libc/stdlib/getopt_long.3 View File

@ -0,0 +1,326 @@
.\" $OpenBSD: getopt_long.3,v 1.1 2002/12/03 20:24:30 millert Exp $
.\" $NetBSD: getopt_long.3,v 1.11 2002/10/02 10:54:19 wiz Exp $
.\"
.\" 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 ,
.Nm getopt_long_only
.Nd get long options from command line argument list
.Sh SYNOPSIS
.Fd #include <getopt.h>
.Vt extern char *optarg;
.Vt extern int optind;
.Vt extern int optopt;
.Vt extern int opterr;
.Vt extern int optreset;
.Ft int
.Fn getopt_long "int argc" "char * const *argv" "const char *optstring" "struct option *long options" "int *index"
.Ft int
.Fn getopt_long_only "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 not
.Dv 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
.Dv NULL ,
then the
.Fa val
field will be returned.
Setting
.Fa flag
to
.Dv NULL
and setting
.Fa val
to the corresponding short option will make this function act just
like
.Xr getopt 3 .
.Pp
The
.Fn getopt_long_only
function behaves identically to
.Fn getopt_long
with the exception that long options may start with
.Sq -
in addition to
.Sq -- .
If an option starting with
.Sq -
does not match a long option but does match a single-character option,
the single-character option is returned.
.Sh EXAMPLES
.Bd -literal -compact
int bflag, ch, fd;
int daggerset;
/* options descriptor */
static struct option longopts[] = {
{ "buffy", no_argument, 0, 'b' },
{ "fluoride", required_argument, 0, 'f' },
{ "daggerset", no_argument, &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)) == -1)
err(1, "unable to open %s", optarg);
break;
case 0:
if (daggerset) {
fprintf(stderr,"Buffy will use her dagger to "
"apply fluoride 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 "OpenBSD"
.It Li GNU
ignores POSIXLY_CORRECT and returns non-options as
arguments to option '\e1'.
.It Li OpenBSD
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 "OpenBSD"
.It Li Both
GNU and OpenBSD 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 "OpenBSD"
.It Li GNU
returns '?'
.It OpenBSD
returns ':' (since OpenBSD's getopt does).
.El
.It Li o
handling of --a in getopt:
.Bl -tag -width "OpenBSD"
.It Li GNU
parses this as option '-', option 'a'.
.It Li OpenBSD
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 !=
.Dv NULL :
.Bl -tag -width "OpenBSD"
.It Li GNU
sets optopt to val.
.It Li OpenBSD
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 "OpenBSD"
.It Li GNU
causes a segfault.
.It Li OpenBSD
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 "OpenBSD"
.It Li GNU
sets optarg to the option name (the argument of -W).
.It Li OpenBSD
sets optarg to
.Dv 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 "OpenBSD"
.It Li GNU
returns -W with optarg set to the unknown option.
.It Li OpenBSD
treats this as an error (unknown option) and returns '?' with
optopt set to 0 and optarg set to
.Dv NULL
(as GNU's man page documents).
.El
.It Li o
The error messages are different.
.It Li o
OpenBSD 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 ENVIRONMENT
.Bl -tag -width POSIXLY_CORRECT
.It Ev POSIXLY_CORRECT
If set, option processing stops when the first non-option is found and
a leading
.Sq -
or
.Sq +
in the
.Ar optstring
is ignored.
.El
.Sh SEE ALSO
.Xr getopt 3
.Sh HISTORY
The
.Fn getopt_long
and
.Fn getopt_long_only
functions first appeared in GNU libiberty.
This implementation first appeared in
.Ox 3.3 .
.Sh BUGS
The
.Ar argv
argument is not really
.Dv const
as its elements may be permuted (unless
.Ev POSIXLY_CORRECT
is set).
.Pp
In a future release, this implementation should completely replace
.Xr getopt 3 .

+ 510
- 0
src/lib/libc/stdlib/getopt_long.c View File

@ -0,0 +1,510 @@
/* $OpenBSD: getopt_long.c,v 1.1 2002/12/03 20:24:30 millert Exp $ */
/* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $ */
/*-
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: getopt_long.c,v 1.1 2002/12/03 20:24:30 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
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 */
#define PRINT_ERROR ((opterr) && (*options != ':'))
#define FLAG_PERMUTE 0x01
#define FLAG_ALLARGS 0x02
#define FLAG_LONGONLY 0x04
/* return values */
#define BADCH (int)'?'
#define BADARG ((*options == ':') ? (int)':' : (int)'?')
#define INORDER (int)1
#define EMSG ""
static int getopt_internal(int, char * const *, const char *, int);
static int getopt_long_internal(int, char * const *, const char *,
const struct option *, int *, int);
static int gcd(int, int);
static void permute_args(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;
/*
* 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, flags)
int nargc;
char * const *nargv;
const char *options;
int flags;
{
char *oli; /* option letter list index */
int optchar;
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 (flags & FLAG_ALLARGS) {
/*
* GNU extension:
* return non-option as argument to option 1
*/
optarg = nargv[optind++];
return INORDER;
}
if (!(flags & FLAG_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, optchar)) == NULL) {
/* could it be a long option with a single '-'? */
if (flags & FLAG_LONGONLY)
return -2;
/* 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 BSD getopt]
*/
int
getopt(nargc, nargv, options)
int nargc;
char * const *nargv;
const char *options;
{
int retval;
if ((retval = getopt_internal(nargc, nargv, options, 0)) == -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 /* REPLACE_GETOPT */
/*
* getopt_long_internal --
* Parse argc/argv argument vector.
*/
static int
getopt_long_internal(nargc, nargv, options, long_options, idx, flags)
int nargc;
char * const *nargv;
const char *options;
const struct option *long_options;
int *idx;
int flags;
{
int retval;
/*
* Disable GNU extensions if POSIXLY_CORRECT is set or options
* string begins with a '+'.
*/
if (getenv("POSIXLY_CORRECT")) {
if (*options == '+' || *options == '-')
options++;
} else {
if (*options == '+') {
options++;
} else {
flags |= FLAG_PERMUTE;
if (*options == '-') {
flags |= FLAG_ALLARGS;
options++;
}
}
}
if ((retval = getopt_internal(nargc, nargv, options, flags)) == -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;
}
/*
* 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;
{
return getopt_long_internal(nargc, nargv, options, long_options, idx, 0);
}
/*
* getopt_long_only --
* Parse argc/argv argument vector.
*/
int
getopt_long_only(nargc, nargv, options, long_options, idx)
int nargc;
char * const *nargv;
const char *options;
const struct option *long_options;
int *idx;
{
return getopt_long_internal(nargc, nargv, options, long_options, idx,
FLAG_LONGONLY);
}

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