2 NOTE: getopt is now part of the C library, so if you don't know what
3 "Keep this file name-space clean" means, talk to drepper@gnu.org
5 Copyright (C) 1987,88,89,90,91,92,93,94,95,96,98,99,2000,2001
6 Free Software Foundation, Inc.
7 This file is part of the GNU C Library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software Foundation,
21 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
24 Ditto for AIX 3.2 and <stdlib.h>. */
33 #if !defined __STDC__ || !__STDC__
34 /* This is a separate conditional since some stdc systems
35 reject `defined (const)'. */
43 /* Comment out all this code if we are using the GNU C Library, and are not
44 actually compiling the library itself. This code is part of the GNU C
45 Library, but also included in many other GNU distributions. Compiling
46 and linking in this code is a waste when using the GNU C library
47 (especially if it is a shared library). Rather than having every GNU
48 program understand `configure --with-gnu-libc' and omit the object files,
49 it is simpler to just do this in the source for each such file. */
51 #define GETOPT_INTERFACE_VERSION 2
52 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
53 # include <gnu-versions.h>
54 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
62 /* This needs to come after some library #include
63 to get __GNU_LIBRARY__ defined. */
64 #ifdef __GNU_LIBRARY__
65 /* Don't include stdlib.h for non-GNU C libraries because some of them
66 contain conflicting prototypes for getopt. */
69 #endif /* GNU C library. */
73 # if HAVE_STRING_H - 0
79 /* This is for other GNU distributions with internationalized messages. */
80 # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
83 # define _(msgid) gettext (msgid)
86 # define _(msgid) (msgid)
90 /* This version of `getopt' appears to the caller like standard Unix `getopt'
91 but it behaves differently for the user, since it allows the user
92 to intersperse the options with the other arguments.
94 As `getopt' works, it permutes the elements of ARGV so that,
95 when it is done, all the options precede everything else. Thus
96 all application programs are extended to handle flexible argument order.
98 Setting the environment variable POSIXLY_CORRECT disables permutation.
99 Then the behavior is completely standard.
101 GNU application programs can use a third alternative mode in which
102 they can distinguish the relative order of options and other arguments. */
106 /* For communication from `getopt' to the caller.
107 When `getopt' finds an option that takes an argument,
108 the argument value is returned here.
109 Also, when `ordering' is RETURN_IN_ORDER,
110 each non-option ARGV-element is returned here. */
114 /* Index in ARGV of the next element to be scanned.
115 This is used for communication to and from the caller
116 and for communication between successive calls to `getopt'.
118 On entry to `getopt', zero means this is the first call; initialize.
120 When `getopt' returns -1, this is the index of the first of the
121 non-option elements that the caller should itself scan.
123 Otherwise, `optind' communicates from one call to the next
124 how much of ARGV has been scanned so far. */
126 /* 1003.2 says this must be 1 before any call. */
129 /* Formerly, initialization of getopt depended on optind==0, which
130 causes problems with re-calling getopt as programs generally don't
133 int __getopt_initialized;
135 /* The next char to be scanned in the option-element
136 in which the last option character we returned was found.
137 This allows us to pick up the scan where we left off.
139 If this is zero, or a null string, it means resume the scan
140 by advancing to the next ARGV-element. */
142 static char *nextchar;
144 /* Callers store zero here to inhibit the error message
145 for unrecognized options. */
149 /* Set to an option character which was unrecognized.
150 This must be initialized on some systems to avoid linking in the
151 system's own getopt implementation. */
155 /* Describe how to deal with options that follow non-option ARGV-elements.
157 If the caller did not specify anything,
158 the default is REQUIRE_ORDER if the environment variable
159 POSIXLY_CORRECT is defined, PERMUTE otherwise.
161 REQUIRE_ORDER means don't recognize them as options;
162 stop option processing when the first non-option is seen.
163 This is what Unix does.
164 This mode of operation is selected by either setting the environment
165 variable POSIXLY_CORRECT, or using `+' as the first character
166 of the list of option characters.
168 PERMUTE is the default. We permute the contents of ARGV as we scan,
169 so that eventually all the non-options are at the end. This allows options
170 to be given in any order, even with programs that were not written to
173 RETURN_IN_ORDER is an option available to programs that were written
174 to expect options and other ARGV-elements in any order and that care about
175 the ordering of the two. We describe each non-option ARGV-element
176 as if it were the argument of an option with character code 1.
177 Using `-' as the first character of the list of option characters
178 selects this mode of operation.
180 The special argument `--' forces an end of option-scanning regardless
181 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
182 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
185 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
188 /* Value of POSIXLY_CORRECT environment variable. */
189 static char *posixly_correct;
191 #ifdef __GNU_LIBRARY__
192 /* We want to avoid inclusion of string.h with non-GNU libraries
193 because there are many ways it can cause trouble.
194 On some systems, it contains special magic macros that don't work
197 # define my_index strchr
203 # include <strings.h>
206 /* Avoid depending on library functions or files
207 whose names are inconsistent. */
210 extern char *getenv();
213 static char *my_index(str, chr)
225 /* If using GCC, we can safely declare strlen this way.
226 If not using GCC, it is ok not to declare it. */
228 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
229 That was relevant to code that was here before. */
230 # if (!defined __STDC__ || !__STDC__) && !defined strlen
231 /* gcc with -traditional declares the built-in strlen to return int,
232 and has done so at least since version 2.4.5. -- rms. */
233 extern int strlen(const char *);
234 # endif /* not __STDC__ */
235 #endif /* __GNUC__ */
237 #endif /* not __GNU_LIBRARY__ */
239 /* Handle permutation of arguments. */
241 /* Describe the part of ARGV that contains non-options that have
242 been skipped. `first_nonopt' is the index in ARGV of the first of them;
243 `last_nonopt' is the index after the last of them. */
245 static int first_nonopt;
246 static int last_nonopt;
249 /* Bash 2.0 gives us an environment variable containing flags
250 indicating ARGV elements that should not be considered arguments. */
252 #ifdef USE_NONOPTION_FLAGS
253 /* Defined in getopt_init.c */
254 extern char *__getopt_nonoption_flags;
256 static int nonoption_flags_max_len;
257 static int nonoption_flags_len;
260 static int original_argc;
261 static char *const *original_argv;
263 /* Make sure the environment variable bash 2.0 puts in the environment
264 is valid for the getopt call we must make sure that the ARGV passed
265 to getopt is that one passed to the process. */
267 __attribute__ ((unused)) store_args_and_env(int argc,
270 /* XXX This is no good solution. We should rather copy the args so
271 that we can compare them later. But we must not use malloc(3). */
272 original_argc = argc;
273 original_argv = argv;
276 # ifdef text_set_element
277 text_set_element(__libc_subinit, store_args_and_env);
278 # endif /* text_set_element */
280 # ifdef USE_NONOPTION_FLAGS
281 # define SWAP_FLAGS(ch1, ch2) \
282 if (nonoption_flags_len > 0) \
284 char __tmp = __getopt_nonoption_flags[ch1]; \
285 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
286 __getopt_nonoption_flags[ch2] = __tmp; \
289 # define SWAP_FLAGS(ch1, ch2)
292 # define SWAP_FLAGS(ch1, ch2)
295 /* Exchange two adjacent subsequences of ARGV.
296 One subsequence is elements [first_nonopt,last_nonopt)
297 which contains all the non-options that have been skipped so far.
298 The other is elements [last_nonopt,optind), which contains all
299 the options processed since those non-options were skipped.
301 `first_nonopt' and `last_nonopt' are relocated so that they describe
302 the new indices of the non-options in ARGV after they are moved. */
304 #if defined __STDC__ && __STDC__
305 static void exchange(char **);
308 static void exchange(argv)
311 int bottom = first_nonopt;
312 int middle = last_nonopt;
316 /* Exchange the shorter segment with the far end of the longer segment.
317 That puts the shorter segment into the right place.
318 It leaves the longer segment in the right place overall,
319 but it consists of two parts that need to be swapped next. */
321 #if defined _LIBC && defined USE_NONOPTION_FLAGS
322 /* First make sure the handling of the `__getopt_nonoption_flags'
323 string can work normally. Our top argument must be in the range
325 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) {
326 /* We must extend the array. The user plays games with us and
327 presents new arguments. */
328 char *new_str = malloc(top + 1);
330 nonoption_flags_len = nonoption_flags_max_len = 0;
332 memset(__mempcpy(new_str, __getopt_nonoption_flags,
333 nonoption_flags_max_len),
334 '\0', top + 1 - nonoption_flags_max_len);
335 nonoption_flags_max_len = top + 1;
336 __getopt_nonoption_flags = new_str;
341 while (top > middle && middle > bottom) {
342 if (top - middle > middle - bottom) {
343 /* Bottom segment is the short one. */
344 int len = middle - bottom;
347 /* Swap it with the top part of the top segment. */
348 for (i = 0; i < len; i++) {
349 tem = argv[bottom + i];
351 argv[top - (middle - bottom) + i];
352 argv[top - (middle - bottom) + i] = tem;
353 SWAP_FLAGS(bottom + i,
354 top - (middle - bottom) + i);
356 /* Exclude the moved bottom segment from further swapping. */
359 /* Top segment is the short one. */
360 int len = top - middle;
363 /* Swap it with the bottom part of the bottom segment. */
364 for (i = 0; i < len; i++) {
365 tem = argv[bottom + i];
366 argv[bottom + i] = argv[middle + i];
367 argv[middle + i] = tem;
368 SWAP_FLAGS(bottom + i, middle + i);
370 /* Exclude the moved top segment from further swapping. */
375 /* Update records for the slots the non-options now occupy. */
377 first_nonopt += (optind - last_nonopt);
378 last_nonopt = optind;
381 /* Initialize the internal data when the first call is made. */
383 #if defined __STDC__ && __STDC__
384 static const char *_getopt_initialize(int, char *const *, const char *);
386 static const char *_getopt_initialize(argc, argv, optstring)
389 const char *optstring;
391 /* Start processing options with ARGV-element 1 (since ARGV-element 0
392 is the program name); the sequence of previously skipped
393 non-option ARGV-elements is empty. */
395 first_nonopt = last_nonopt = optind;
399 posixly_correct = getenv("POSIXLY_CORRECT");
401 /* Determine how to handle the ordering of options and nonoptions. */
403 if (optstring[0] == '-') {
404 ordering = RETURN_IN_ORDER;
406 } else if (optstring[0] == '+') {
407 ordering = REQUIRE_ORDER;
409 } else if (posixly_correct != NULL)
410 ordering = REQUIRE_ORDER;
414 #if defined _LIBC && defined USE_NONOPTION_FLAGS
415 if (posixly_correct == NULL
416 && argc == original_argc && argv == original_argv) {
417 if (nonoption_flags_max_len == 0) {
418 if (__getopt_nonoption_flags == NULL
419 || __getopt_nonoption_flags[0] == '\0')
420 nonoption_flags_max_len = -1;
422 const char *orig_str =
423 __getopt_nonoption_flags;
424 int len = nonoption_flags_max_len =
426 if (nonoption_flags_max_len < argc)
427 nonoption_flags_max_len = argc;
428 __getopt_nonoption_flags = (char *)
429 malloc(nonoption_flags_max_len);
430 if (__getopt_nonoption_flags == NULL)
431 nonoption_flags_max_len = -1;
434 (__getopt_nonoption_flags,
435 orig_str, len), '\0',
436 nonoption_flags_max_len -
440 nonoption_flags_len = nonoption_flags_max_len;
442 nonoption_flags_len = 0;
448 /* Scan elements of ARGV (whose length is ARGC) for option characters
451 If an element of ARGV starts with '-', and is not exactly "-" or "--",
452 then it is an option element. The characters of this element
453 (aside from the initial '-') are option characters. If `getopt'
454 is called repeatedly, it returns successively each of the option characters
455 from each of the option elements.
457 If `getopt' finds another option character, it returns that character,
458 updating `optind' and `nextchar' so that the next call to `getopt' can
459 resume the scan with the following option character or ARGV-element.
461 If there are no more option characters, `getopt' returns -1.
462 Then `optind' is the index in ARGV of the first ARGV-element
463 that is not an option. (The ARGV-elements have been permuted
464 so that those that are not options now come last.)
466 OPTSTRING is a string containing the legitimate option characters.
467 If an option character is seen that is not listed in OPTSTRING,
468 return '?' after printing an error message. If you set `opterr' to
469 zero, the error message is suppressed but we still return '?'.
471 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
472 so the following text in the same ARGV-element, or the text of the following
473 ARGV-element, is returned in `optarg'. Two colons mean an option that
474 wants an optional arg; if there is text in the current ARGV-element,
475 it is returned in `optarg', otherwise `optarg' is set to zero.
477 If OPTSTRING starts with `-' or `+', it requests different methods of
478 handling the non-option ARGV-elements.
479 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
481 Long-named options begin with `--' instead of `-'.
482 Their names may be abbreviated as long as the abbreviation is unique
483 or is an exact match for some defined option. If they have an
484 argument, it follows the option name in the same ARGV-element, separated
485 from the option name by a `=', or else the in next ARGV-element.
486 When `getopt' finds a long-named option, it returns 0 if that option's
487 `flag' field is nonzero, the value of the option's `val' field
488 if the `flag' field is zero.
490 The elements of ARGV aren't really const, because we permute them.
491 But we pretend they're const in the prototype to be compatible
494 LONGOPTS is a vector of `struct option' terminated by an
495 element containing a name which is zero.
497 LONGIND returns the index in LONGOPT of the long-named option found.
498 It is only valid when a long-named option has been found by the most
501 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
502 long-named options. */
504 int _getopt_internal(argc, argv, optstring, longopts, longind, long_only)
507 const char *optstring;
508 const struct option *longopts;
512 int print_errors = opterr;
513 if (optstring[0] == ':')
521 if (optind == 0 || !__getopt_initialized) {
523 optind = 1; /* Don't scan ARGV[0], the program name. */
524 optstring = _getopt_initialize(argc, argv, optstring);
525 __getopt_initialized = 1;
528 /* Test whether ARGV[optind] points to a non-option argument.
529 Either it does not have option syntax, or there is an environment flag
530 from the shell indicating it is not an option. The later information
531 is only used when the used in the GNU libc. */
532 #if defined _LIBC && defined USE_NONOPTION_FLAGS
533 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
534 || (optind < nonoption_flags_len \
535 && __getopt_nonoption_flags[optind] == '1'))
537 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
540 if (nextchar == NULL || *nextchar == '\0') {
541 /* Advance to the next ARGV-element. */
543 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
544 moved back by the user (who may also have changed the arguments). */
545 if (last_nonopt > optind)
546 last_nonopt = optind;
547 if (first_nonopt > optind)
548 first_nonopt = optind;
550 if (ordering == PERMUTE) {
551 /* If we have just processed some options following some non-options,
552 exchange them so that the options come first. */
554 if (first_nonopt != last_nonopt
555 && last_nonopt != optind)
556 exchange((char **) argv);
557 else if (last_nonopt != optind)
558 first_nonopt = optind;
560 /* Skip any additional non-options
561 and extend the range of non-options previously skipped. */
563 while (optind < argc && NONOPTION_P)
565 last_nonopt = optind;
568 /* The special ARGV-element `--' means premature end of options.
569 Skip it like a null option,
570 then exchange with previous non-options as if it were an option,
571 then skip everything else like a non-option. */
573 if (optind != argc && !strcmp(argv[optind], "--")) {
576 if (first_nonopt != last_nonopt
577 && last_nonopt != optind)
578 exchange((char **) argv);
579 else if (first_nonopt == last_nonopt)
580 first_nonopt = optind;
586 /* If we have done all the ARGV-elements, stop the scan
587 and back over any non-options that we skipped and permuted. */
589 if (optind == argc) {
590 /* Set the next-arg-index to point at the non-options
591 that we previously skipped, so the caller will digest them. */
592 if (first_nonopt != last_nonopt)
593 optind = first_nonopt;
597 /* If we have come to a non-option and did not permute it,
598 either stop the scan or describe it to the caller and pass it by. */
601 if (ordering == REQUIRE_ORDER)
603 optarg = argv[optind++];
607 /* We have found another option-ARGV-element.
608 Skip the initial punctuation. */
610 nextchar = (argv[optind] + 1
612 && argv[optind][1] == '-'));
615 /* Decode the current option-ARGV-element. */
617 /* Check whether the ARGV-element is a long option.
619 If long_only and the ARGV-element has the form "-f", where f is
620 a valid short option, don't consider it an abbreviated form of
621 a long option that starts with f. Otherwise there would be no
622 way to give the -f short option.
624 On the other hand, if there's a long option "fubar" and
625 the ARGV-element is "-fu", do consider that an abbreviation of
626 the long option, just like "--fu", and not "-f" with arg "u".
628 This distinction seems to be the most useful approach. */
631 && (argv[optind][1] == '-' || (long_only && (argv[optind][2]
638 const struct option *p;
639 const struct option *pfound = NULL;
645 for (nameend = nextchar; *nameend && *nameend != '=';
649 /* Test all long options for either exact match
650 or abbreviated matches. */
651 for (p = longopts, option_index = 0; p->name;
654 (p->name, nextchar, nameend - nextchar)) {
655 if ((unsigned int) (nameend - nextchar)
656 == (unsigned int) strlen(p->name)) {
657 /* Exact match found. */
659 indfound = option_index;
662 } else if (pfound == NULL) {
663 /* First nonexact match found. */
665 indfound = option_index;
667 || pfound->has_arg != p->has_arg
668 || pfound->flag != p->flag
669 || pfound->val != p->val)
670 /* Second or later nonexact match found. */
674 if (ambig && !exact) {
678 ("%s: option `%s' is ambiguous\n"),
679 argv[0], argv[optind]);
680 nextchar += strlen(nextchar);
686 if (pfound != NULL) {
687 option_index = indfound;
690 /* Don't test has_arg with >, because some C compilers don't
691 allow it to be used on enums. */
693 optarg = nameend + 1;
696 if (argv[optind - 1][1] ==
701 ("%s: option `--%s' doesn't allow an argument\n"),
706 /* +option or -option */
709 ("%s: option `%c%s' doesn't allow an argument\n"),
718 nextchar += strlen(nextchar);
720 optopt = pfound->val;
723 } else if (pfound->has_arg == 1) {
725 optarg = argv[optind++];
730 ("%s: option `%s' requires an argument\n"),
733 nextchar += strlen(nextchar);
734 optopt = pfound->val;
735 return optstring[0] ==
739 nextchar += strlen(nextchar);
741 *longind = option_index;
743 *(pfound->flag) = pfound->val;
749 /* Can't find it as a long option. If this is not getopt_long_only,
750 or the option starts with '--' or is not a valid short
751 option, then it's an error.
752 Otherwise interpret it as a short option. */
753 if (!long_only || argv[optind][1] == '-'
754 || my_index(optstring, *nextchar) == NULL) {
756 if (argv[optind][1] == '-')
760 ("%s: unrecognized option `--%s'\n"),
763 /* +option or -option */
766 ("%s: unrecognized option `%c%s'\n"),
767 argv[0], argv[optind][0],
770 nextchar = (char *) "";
777 /* Look at and handle the next short option-character. */
780 char c = *nextchar++;
781 char *temp = my_index(optstring, c);
783 /* Increment `optind' when we start to process its last character. */
784 if (*nextchar == '\0')
787 if (temp == NULL || c == ':') {
790 /* 1003.2 specifies the format of this message. */
793 ("%s: illegal option -- %c\n"),
798 ("%s: invalid option -- %c\n"),
804 /* Convenience. Treat POSIX -W foo same as long option --foo */
805 if (temp[0] == 'W' && temp[1] == ';') {
807 const struct option *p;
808 const struct option *pfound = NULL;
814 /* This is an option that requires an argument. */
815 if (*nextchar != '\0') {
817 /* If we end this ARGV-element by taking the rest as an arg,
818 we must advance to the next element now. */
820 } else if (optind == argc) {
822 /* 1003.2 specifies the format of this message. */
825 ("%s: option requires an argument -- %c\n"),
829 if (optstring[0] == ':')
835 /* We already incremented `optind' once;
836 increment it again when taking next ARGV-elt as argument. */
837 optarg = argv[optind++];
839 /* optarg is now the argument, see if it's in the
840 table of longopts. */
842 for (nextchar = nameend = optarg;
843 *nameend && *nameend != '='; nameend++)
846 /* Test all long options for either exact match
847 or abbreviated matches. */
848 for (p = longopts, option_index = 0; p->name;
852 nameend - nextchar)) {
853 if ((unsigned int) (nameend -
856 /* Exact match found. */
858 indfound = option_index;
861 } else if (pfound == NULL) {
862 /* First nonexact match found. */
864 indfound = option_index;
866 /* Second or later nonexact match found. */
869 if (ambig && !exact) {
873 ("%s: option `-W %s' is ambiguous\n"),
874 argv[0], argv[optind]);
875 nextchar += strlen(nextchar);
879 if (pfound != NULL) {
880 option_index = indfound;
882 /* Don't test has_arg with >, because some C compilers don't
883 allow it to be used on enums. */
885 optarg = nameend + 1;
889 %s: option `-W %s' doesn't allow an argument\n"), argv[0], pfound->
896 } else if (pfound->has_arg == 1) {
898 optarg = argv[optind++];
903 ("%s: option `%s' requires an argument\n"),
909 return optstring[0] ==
913 nextchar += strlen(nextchar);
915 *longind = option_index;
917 *(pfound->flag) = pfound->val;
923 return 'W'; /* Let the application handle it. */
925 if (temp[1] == ':') {
926 if (temp[2] == ':') {
927 /* This is an option that accepts an argument optionally. */
928 if (*nextchar != '\0') {
935 /* This is an option that requires an argument. */
936 if (*nextchar != '\0') {
938 /* If we end this ARGV-element by taking the rest as an arg,
939 we must advance to the next element now. */
941 } else if (optind == argc) {
943 /* 1003.2 specifies the format of this message. */
946 ("%s: option requires an argument -- %c\n"),
950 if (optstring[0] == ':')
955 /* We already incremented `optind' once;
956 increment it again when taking next ARGV-elt as argument. */
957 optarg = argv[optind++];
965 int getopt(argc, argv, optstring)
968 const char *optstring;
970 return _getopt_internal(argc, argv, optstring,
971 (const struct option *) 0, (int *) 0, 0);
974 #endif /* Not ELIDE_CODE. */
978 /* Compile with -DTEST to make an executable for use in testing
979 the above definition of `getopt'. */
986 int digit_optind = 0;
989 int this_option_optind = optind ? optind : 1;
991 c = getopt(argc, argv, "abc:d:0123456789");
1006 if (digit_optind != 0
1007 && digit_optind != this_option_optind)
1009 ("digits occur in two different argv-elements.\n");
1010 digit_optind = this_option_optind;
1011 printf("option %c\n", c);
1015 printf("option a\n");
1019 printf("option b\n");
1023 printf("option c with value `%s'\n", optarg);
1031 ("?? getopt returned character code 0%o ??\n",
1036 if (optind < argc) {
1037 printf("non-option ARGV-elements: ");
1038 while (optind < argc)
1039 printf("%s ", argv[optind++]);