#if 0
#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: getopt_long.c,v 1.16 2004/02/04 18:17:25 millert Exp $";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdlib/getopt_long.c,v 1.15 2006/09/23 14:48:31 ache Exp $");
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#define GNU_COMPATIBLE
#if 0
#define REPLACE_GETOPT
#endif
#ifdef REPLACE_GETOPT
int opterr = 1;
int optind = 1;
int optopt = '?';
int optreset;
char *optarg;
#endif
#define PRINT_ERROR ((opterr) && (*options != ':'))
#define FLAG_PERMUTE 0x01
#define FLAG_ALLARGS 0x02
#define FLAG_LONGONLY 0x04
#define BADCH (int)'?'
#define BADARG ((*options == ':') ? (int)':' : (int)'?')
#define INORDER (int)1
#define EMSG ""
#ifdef GNU_COMPATIBLE
#define NO_PREFIX (-1)
#define D_PREFIX 0
#define DD_PREFIX 1
#define W_PREFIX 2
#endif
static int getopt_internal(int, char * const *, const char *,
const struct option *, int *, int);
static int parse_long_options(char * const *, const char *,
const struct option *, int *, int, int);
static int gcd(int, int);
static void permute_args(int, int, int, char * const *);
static char *place = EMSG;
static int nonopt_start = -1;
static int nonopt_end = -1;
static const char recargchar[] = "option requires an argument -- %c";
static const char illoptchar[] = "illegal option -- %c";
#ifdef GNU_COMPATIBLE
static int dash_prefix = NO_PREFIX;
static const char gnuoptchar[] = "invalid option -- %c";
static const char recargstring[] = "option `%s%s' requires an argument";
static const char ambig[] = "option `%s%.*s' is ambiguous";
static const char noarg[] = "option `%s%.*s' doesn't allow an argument";
static const char illoptstring[] = "unrecognized option `%s%s'";
#else
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 illoptstring[] = "unknown option -- %s";
#endif
static int
gcd(int a, int b)
{
int c;
c = a % b;
while (c != 0) {
a = b;
b = c;
c = a % b;
}
return (b);
}
static void
permute_args(int panonopt_start, int panonopt_end, int opt_end,
char * const *nargv)
{
int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
char *swap;
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];
((char **) nargv)[pos] = nargv[cstart];
((char **)nargv)[cstart] = swap;
}
}
}
static int
parse_long_options(char * const *nargv, const char *options,
const struct option *long_options, int *idx, int short_too, int flags)
{
char *current_argv, *has_equal;
#ifdef GNU_COMPATIBLE
char *current_dash;
#endif
size_t current_argv_len;
int i, match, exact_match, second_partial_match;
current_argv = place;
#ifdef GNU_COMPATIBLE
switch (dash_prefix) {
case D_PREFIX:
current_dash = "-";
break;
case DD_PREFIX:
current_dash = "--";
break;
case W_PREFIX:
current_dash = "-W ";
break;
default:
current_dash = "";
break;
}
#endif
match = -1;
exact_match = 0;
second_partial_match = 0;
optind++;
if ((has_equal = strchr(current_argv, '=')) != NULL) {
current_argv_len = has_equal - current_argv;
has_equal++;
} else
current_argv_len = strlen(current_argv);
for (i = 0; long_options[i].name; i++) {
if (strncmp(current_argv, long_options[i].name,
current_argv_len))
continue;
if (strlen(long_options[i].name) == current_argv_len) {
match = i;
exact_match = 1;
break;
}
if (short_too && current_argv_len == 1)
continue;
if (match == -1)
match = i;
else if ((flags & FLAG_LONGONLY) ||
long_options[i].has_arg !=
long_options[match].has_arg ||
long_options[i].flag != long_options[match].flag ||
long_options[i].val != long_options[match].val)
second_partial_match = 1;
}
if (!exact_match && second_partial_match) {
if (PRINT_ERROR)
warnx(ambig,
#ifdef GNU_COMPATIBLE
current_dash,
#endif
(int)current_argv_len,
current_argv);
optopt = 0;
return (BADCH);
}
if (match != -1) {
if (long_options[match].has_arg == no_argument
&& has_equal) {
if (PRINT_ERROR)
warnx(noarg,
#ifdef GNU_COMPATIBLE
current_dash,
#endif
(int)current_argv_len,
current_argv);
if (long_options[match].flag == NULL)
optopt = long_options[match].val;
else
optopt = 0;
#ifdef GNU_COMPATIBLE
return (BADCH);
#else
return (BADARG);
#endif
}
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) {
optarg = nargv[optind++];
}
}
if ((long_options[match].has_arg == required_argument)
&& (optarg == NULL)) {
if (PRINT_ERROR)
warnx(recargstring,
#ifdef GNU_COMPATIBLE
current_dash,
#endif
current_argv);
if (long_options[match].flag == NULL)
optopt = long_options[match].val;
else
optopt = 0;
--optind;
return (BADARG);
}
} else {
if (short_too) {
--optind;
return (-1);
}
if (PRINT_ERROR)
warnx(illoptstring,
#ifdef GNU_COMPATIBLE
current_dash,
#endif
current_argv);
optopt = 0;
return (BADCH);
}
if (idx)
*idx = match;
if (long_options[match].flag) {
*long_options[match].flag = long_options[match].val;
return (0);
} else
return (long_options[match].val);
}
static int
getopt_internal(int nargc, char * const *nargv, const char *options,
const struct option *long_options, int *idx, int flags)
{
char *oli;
int optchar, short_too;
int posixly_correct;
if (options == NULL)
return (-1);
posixly_correct = (getenv("POSIXLY_CORRECT") != NULL);
#ifdef GNU_COMPATIBLE
if (*options == '-')
flags |= FLAG_ALLARGS;
else if (posixly_correct || *options == '+')
flags &= ~FLAG_PERMUTE;
#else
if (posixly_correct || *options == '+')
flags &= ~FLAG_PERMUTE;
else if (*options == '-')
flags |= FLAG_ALLARGS;
#endif
if (*options == '+' || *options == '-')
options++;
if (optind == 0)
optind = optreset = 1;
optarg = NULL;
if (optreset)
nonopt_start = nonopt_end = -1;
start:
if (optreset || !*place) {
optreset = 0;
if (optind >= nargc) {
place = EMSG;
if (nonopt_end != -1) {
permute_args(nonopt_start, nonopt_end,
optind, nargv);
optind -= nonopt_end - nonopt_start;
}
else if (nonopt_start != -1) {
optind = nonopt_start;
}
nonopt_start = nonopt_end = -1;
return (-1);
}
if (*(place = nargv[optind]) != '-' ||
#ifdef GNU_COMPATIBLE
place[1] == '\0') {
#else
(place[1] == '\0' && strchr(options, '-') == NULL)) {
#endif
place = EMSG;
if (flags & FLAG_ALLARGS) {
optarg = nargv[optind++];
return (INORDER);
}
if (!(flags & FLAG_PERMUTE)) {
return (-1);
}
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++;
goto start;
}
if (nonopt_start != -1 && nonopt_end == -1)
nonopt_end = optind;
if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
optind++;
place = EMSG;
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 (long_options != NULL && place != nargv[optind] &&
(*place == '-' || (flags & FLAG_LONGONLY))) {
short_too = 0;
#ifdef GNU_COMPATIBLE
dash_prefix = D_PREFIX;
#endif
if (*place == '-') {
place++;
#ifdef GNU_COMPATIBLE
dash_prefix = DD_PREFIX;
#endif
} else if (*place != ':' && strchr(options, *place) != NULL)
short_too = 1;
optchar = parse_long_options(nargv, options, long_options,
idx, short_too, flags);
if (optchar != -1) {
place = EMSG;
return (optchar);
}
}
if ((optchar = (int)*place++) == (int)':' ||
(optchar == (int)'-' && *place != '\0') ||
(oli = strchr(options, optchar)) == NULL) {
if (optchar == (int)'-' && *place == '\0')
return (-1);
if (!*place)
++optind;
#ifdef GNU_COMPATIBLE
if (PRINT_ERROR)
warnx(posixly_correct ? illoptchar : gnuoptchar,
optchar);
#else
if (PRINT_ERROR)
warnx(illoptchar, optchar);
#endif
optopt = optchar;
return (BADCH);
}
if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
if (*place)
;
else if (++optind >= nargc) {
place = EMSG;
if (PRINT_ERROR)
warnx(recargchar, optchar);
optopt = optchar;
return (BADARG);
} else
place = nargv[optind];
#ifdef GNU_COMPATIBLE
dash_prefix = W_PREFIX;
#endif
optchar = parse_long_options(nargv, options, long_options,
idx, 0, flags);
place = EMSG;
return (optchar);
}
if (*++oli != ':') {
if (!*place)
++optind;
} else {
optarg = NULL;
if (*place)
optarg = place;
else if (oli[1] != ':') {
if (++optind >= nargc) {
place = EMSG;
if (PRINT_ERROR)
warnx(recargchar, optchar);
optopt = optchar;
return (BADARG);
} else
optarg = nargv[optind];
}
place = EMSG;
++optind;
}
return (optchar);
}
#ifdef REPLACE_GETOPT
int
getopt(int nargc, char * const *nargv, const char *options)
{
return (getopt_internal(nargc, nargv, options, NULL, NULL, 0));
}
#endif
int
getopt_long(int nargc, char * const *nargv, const char *options,
const struct option *long_options, int *idx)
{
return (getopt_internal(nargc, nargv, options, long_options, idx,
FLAG_PERMUTE));
}
int
getopt_long_only(int nargc, char * const *nargv, const char *options,
const struct option *long_options, int *idx)
{
return (getopt_internal(nargc, nargv, options, long_options, idx,
FLAG_PERMUTE|FLAG_LONGONLY));
}