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 roland@gnu.ai.mit.edu
6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
7 Free Software Foundation, Inc.
9 NOTE: The canonical source of this file is maintained with the GNU C Library.
10 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
12 This program is free software; you can redistribute it and/or modify it
13 under the terms of the GNU General Public License as published by the
14 Free Software Foundation; either version 2, or (at your option) any
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
27 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
28 Ditto for AIX 3.2 and <stdlib.h>. */
37 #if !defined (__STDC__) || !__STDC__
38 /* This is a separate conditional since some stdc systems
39 reject `defined (const)'. */
48 /* Comment out all this code if we are using the GNU C Library, and are not
49 actually compiling the library itself. This code is part of the GNU C
50 Library, but also included in many other GNU distributions. Compiling
51 and linking in this code is a waste when using the GNU C library
52 (especially if it is a shared library). Rather than having every GNU
53 program understand `configure --with-gnu-libc' and omit the object files,
54 it is simpler to just do this in the source for each such file. */
56 #define GETOPT_INTERFACE_VERSION 2
57 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
58 #include <gnu-versions.h>
59 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
67 /* This needs to come after some library #include
68 to get __GNU_LIBRARY__ defined. */
69 #ifdef __GNU_LIBRARY__
70 /* Don't include stdlib.h for non-GNU C libraries because some of them
71 contain conflicting prototypes for getopt. */
74 #endif /* GNU C library. */
83 #if defined (WIN32) && !defined (__CYGWIN32__)
84 /* It's not Unix, really. See? Capital letters. */
86 #define getpid() GetCurrentProcessId()
90 /* This is for other GNU distributions with internationalized messages.
91 When compiling libc, the _ macro is predefined. */
94 # define _(msgid) gettext (msgid)
96 # define _(msgid) (msgid)
100 /* This version of `getopt' appears to the caller like standard Unix `getopt'
101 but it behaves differently for the user, since it allows the user
102 to intersperse the options with the other arguments.
104 As `getopt' works, it permutes the elements of ARGV so that,
105 when it is done, all the options precede everything else. Thus
106 all application programs are extended to handle flexible argument order.
108 Setting the environment variable POSIXLY_CORRECT disables permutation.
109 Then the behavior is completely standard.
111 GNU application programs can use a third alternative mode in which
112 they can distinguish the relative order of options and other arguments. */
116 /* For communication from `getopt' to the caller.
117 When `getopt' finds an option that takes an argument,
118 the argument value is returned here.
119 Also, when `ordering' is RETURN_IN_ORDER,
120 each non-option ARGV-element is returned here. */
124 /* Index in ARGV of the next element to be scanned.
125 This is used for communication to and from the caller
126 and for communication between successive calls to `getopt'.
128 On entry to `getopt', zero means this is the first call; initialize.
130 When `getopt' returns -1, this is the index of the first of the
131 non-option elements that the caller should itself scan.
133 Otherwise, `optind' communicates from one call to the next
134 how much of ARGV has been scanned so far. */
136 /* 1003.2 says this must be 1 before any call. */
139 /* Formerly, initialization of getopt depended on optind==0, which
140 causes problems with re-calling getopt as programs generally don't
143 int __getopt_initialized = 0;
145 /* The next char to be scanned in the option-element
146 in which the last option character we returned was found.
147 This allows us to pick up the scan where we left off.
149 If this is zero, or a null string, it means resume the scan
150 by advancing to the next ARGV-element. */
152 static char *nextchar;
154 /* Callers store zero here to inhibit the error message
155 for unrecognized options. */
159 /* Set to an option character which was unrecognized.
160 This must be initialized on some systems to avoid linking in the
161 system's own getopt implementation. */
165 /* Describe how to deal with options that follow non-option ARGV-elements.
167 If the caller did not specify anything,
168 the default is REQUIRE_ORDER if the environment variable
169 POSIXLY_CORRECT is defined, PERMUTE otherwise.
171 REQUIRE_ORDER means don't recognize them as options;
172 stop option processing when the first non-option is seen.
173 This is what Unix does.
174 This mode of operation is selected by either setting the environment
175 variable POSIXLY_CORRECT, or using `+' as the first character
176 of the list of option characters.
178 PERMUTE is the default. We permute the contents of ARGV as we scan,
179 so that eventually all the non-options are at the end. This allows options
180 to be given in any order, even with programs that were not written to
183 RETURN_IN_ORDER is an option available to programs that were written
184 to expect options and other ARGV-elements in any order and that care about
185 the ordering of the two. We describe each non-option ARGV-element
186 as if it were the argument of an option with character code 1.
187 Using `-' as the first character of the list of option characters
188 selects this mode of operation.
190 The special argument `--' forces an end of option-scanning regardless
191 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
192 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
196 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
199 /* Value of POSIXLY_CORRECT environment variable. */
200 static char *posixly_correct;
202 #ifdef __GNU_LIBRARY__
203 /* We want to avoid inclusion of string.h with non-GNU libraries
204 because there are many ways it can cause trouble.
205 On some systems, it contains special magic macros that don't work
208 #define my_index strchr
211 /* Avoid depending on library functions or files
212 whose names are inconsistent. */
230 /* If using GCC, we can safely declare strlen this way.
231 If not using GCC, it is ok not to declare it. */
233 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
234 That was relevant to code that was here before. */
235 #if !defined (__STDC__) || !__STDC__
236 /* gcc with -traditional declares the built-in strlen to return int,
237 and has done so at least since version 2.4.5. -- rms. */
238 extern int strlen (const char *);
239 #endif /* not __STDC__ */
240 #endif /* __GNUC__ */
242 #endif /* not __GNU_LIBRARY__ */
244 /* Handle permutation of arguments. */
246 /* Describe the part of ARGV that contains non-options that have
247 been skipped. `first_nonopt' is the index in ARGV of the first of them;
248 `last_nonopt' is the index after the last of them. */
250 static int first_nonopt;
251 static int last_nonopt;
254 /* Bash 2.0 gives us an environment variable containing flags
255 indicating ARGV elements that should not be considered arguments. */
257 /* Defined in getopt_init.c */
258 extern char *__getopt_nonoption_flags;
260 static int nonoption_flags_max_len;
261 static int nonoption_flags_len;
263 static int original_argc;
264 static char *const *original_argv;
266 extern pid_t __libc_pid;
268 /* Make sure the environment variable bash 2.0 puts in the environment
269 is valid for the getopt call we must make sure that the ARGV passed
270 to getopt is that one passed to the process. */
272 __attribute__ ((unused))
273 store_args_and_env (int argc, char *const *argv)
275 /* XXX This is no good solution. We should rather copy the args so
276 that we can compare them later. But we must not use malloc(3). */
277 original_argc = argc;
278 original_argv = argv;
280 text_set_element (__libc_subinit, store_args_and_env);
282 # define SWAP_FLAGS(ch1, ch2) \
283 if (nonoption_flags_len > 0) \
285 char __tmp = __getopt_nonoption_flags[ch1]; \
286 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
287 __getopt_nonoption_flags[ch2] = __tmp; \
290 # define SWAP_FLAGS(ch1, ch2)
293 /* Exchange two adjacent subsequences of ARGV.
294 One subsequence is elements [first_nonopt,last_nonopt)
295 which contains all the non-options that have been skipped so far.
296 The other is elements [last_nonopt,optind), which contains all
297 the options processed since those non-options were skipped.
299 `first_nonopt' and `last_nonopt' are relocated so that they describe
300 the new indices of the non-options in ARGV after they are moved. */
302 #if defined (__STDC__) && __STDC__
303 static void exchange (char **);
310 int bottom = first_nonopt;
311 int middle = last_nonopt;
315 /* Exchange the shorter segment with the far end of the longer segment.
316 That puts the shorter segment into the right place.
317 It leaves the longer segment in the right place overall,
318 but it consists of two parts that need to be swapped next. */
321 /* First make sure the handling of the `__getopt_nonoption_flags'
322 string can work normally. Our top argument must be in the range
324 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;
333 memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
334 memset (&new_str[nonoption_flags_max_len], '\0',
335 top + 1 - nonoption_flags_max_len);
336 nonoption_flags_max_len = top + 1;
337 __getopt_nonoption_flags = new_str;
342 while (top > middle && middle > bottom)
344 if (top - middle > middle - bottom)
346 /* Bottom segment is the short one. */
347 int len = middle - bottom;
350 /* Swap it with the top part of the top segment. */
351 for (i = 0; i < len; i++)
353 tem = argv[bottom + i];
354 argv[bottom + i] = argv[top - (middle - bottom) + i];
355 argv[top - (middle - bottom) + i] = tem;
356 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
358 /* Exclude the moved bottom segment from further swapping. */
363 /* Top segment is the short one. */
364 int len = top - middle;
367 /* Swap it with the bottom part of the bottom segment. */
368 for (i = 0; i < len; i++)
370 tem = argv[bottom + i];
371 argv[bottom + i] = argv[middle + i];
372 argv[middle + i] = tem;
373 SWAP_FLAGS (bottom + i, middle + i);
375 /* Exclude the moved top segment from further swapping. */
380 /* Update records for the slots the non-options now occupy. */
382 first_nonopt += (optind - last_nonopt);
383 last_nonopt = optind;
386 /* Initialize the internal data when the first call is made. */
388 #if defined (__STDC__) && __STDC__
389 static const char *_getopt_initialize (int, char *const *, const char *);
392 _getopt_initialize (argc, argv, optstring)
395 const char *optstring;
397 /* Start processing options with ARGV-element 1 (since ARGV-element 0
398 is the program name); the sequence of previously skipped
399 non-option ARGV-elements is empty. */
401 first_nonopt = last_nonopt = optind;
405 posixly_correct = getenv ("POSIXLY_CORRECT");
407 /* Determine how to handle the ordering of options and nonoptions. */
409 if (optstring[0] == '-')
411 ordering = RETURN_IN_ORDER;
414 else if (optstring[0] == '+')
416 ordering = REQUIRE_ORDER;
419 else if (posixly_correct != NULL)
420 ordering = REQUIRE_ORDER;
425 if (posixly_correct == NULL
426 && argc == original_argc && argv == original_argv)
428 if (nonoption_flags_max_len == 0)
430 if (__getopt_nonoption_flags == NULL
431 || __getopt_nonoption_flags[0] == '\0')
432 nonoption_flags_max_len = -1;
435 const char *orig_str = __getopt_nonoption_flags;
436 int len = nonoption_flags_max_len = strlen (orig_str);
437 if (nonoption_flags_max_len < argc)
438 nonoption_flags_max_len = argc;
439 __getopt_nonoption_flags =
440 (char *) malloc (nonoption_flags_max_len);
441 if (__getopt_nonoption_flags == NULL)
442 nonoption_flags_max_len = -1;
445 memcpy (__getopt_nonoption_flags, orig_str, len);
446 memset (&__getopt_nonoption_flags[len], '\0',
447 nonoption_flags_max_len - len);
451 nonoption_flags_len = nonoption_flags_max_len;
454 nonoption_flags_len = 0;
460 /* Scan elements of ARGV (whose length is ARGC) for option characters
463 If an element of ARGV starts with '-', and is not exactly "-" or "--",
464 then it is an option element. The characters of this element
465 (aside from the initial '-') are option characters. If `getopt'
466 is called repeatedly, it returns successively each of the option characters
467 from each of the option elements.
469 If `getopt' finds another option character, it returns that character,
470 updating `optind' and `nextchar' so that the next call to `getopt' can
471 resume the scan with the following option character or ARGV-element.
473 If there are no more option characters, `getopt' returns -1.
474 Then `optind' is the index in ARGV of the first ARGV-element
475 that is not an option. (The ARGV-elements have been permuted
476 so that those that are not options now come last.)
478 OPTSTRING is a string containing the legitimate option characters.
479 If an option character is seen that is not listed in OPTSTRING,
480 return '?' after printing an error message. If you set `opterr' to
481 zero, the error message is suppressed but we still return '?'.
483 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
484 so the following text in the same ARGV-element, or the text of the following
485 ARGV-element, is returned in `optarg'. Two colons mean an option that
486 wants an optional arg; if there is text in the current ARGV-element,
487 it is returned in `optarg', otherwise `optarg' is set to zero.
489 If OPTSTRING starts with `-' or `+', it requests different methods of
490 handling the non-option ARGV-elements.
491 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
493 Long-named options begin with `--' instead of `-'.
494 Their names may be abbreviated as long as the abbreviation is unique
495 or is an exact match for some defined option. If they have an
496 argument, it follows the option name in the same ARGV-element, separated
497 from the option name by a `=', or else the in next ARGV-element.
498 When `getopt' finds a long-named option, it returns 0 if that option's
499 `flag' field is nonzero, the value of the option's `val' field
500 if the `flag' field is zero.
502 The elements of ARGV aren't really const, because we permute them.
503 But we pretend they're const in the prototype to be compatible
506 LONGOPTS is a vector of `struct option' terminated by an
507 element containing a name which is zero.
509 LONGIND returns the index in LONGOPT of the long-named option found.
510 It is only valid when a long-named option has been found by the most
513 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
514 long-named options. */
517 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
520 const char *optstring;
521 const struct option *longopts;
527 if (optind == 0 || !__getopt_initialized)
530 optind = 1; /* Don't scan ARGV[0], the program name. */
531 optstring = _getopt_initialize (argc, argv, optstring);
532 __getopt_initialized = 1;
535 /* Test whether ARGV[optind] points to a non-option argument.
536 Either it does not have option syntax, or there is an environment flag
537 from the shell indicating it is not an option. The later information
538 is only used when the used in the GNU libc. */
540 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
541 || (optind < nonoption_flags_len \
542 && __getopt_nonoption_flags[optind] == '1'))
544 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
547 if (nextchar == NULL || *nextchar == '\0')
549 /* Advance to the next ARGV-element. */
551 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
552 moved back by the user (who may also have changed the arguments). */
553 if (last_nonopt > optind)
554 last_nonopt = optind;
555 if (first_nonopt > optind)
556 first_nonopt = optind;
558 if (ordering == PERMUTE)
560 /* If we have just processed some options following some non-options,
561 exchange them so that the options come first. */
563 if (first_nonopt != last_nonopt && last_nonopt != optind)
564 exchange ((char **) argv);
565 else if (last_nonopt != optind)
566 first_nonopt = optind;
568 /* Skip any additional non-options
569 and extend the range of non-options previously skipped. */
571 while (optind < argc && NONOPTION_P)
573 last_nonopt = optind;
576 /* The special ARGV-element `--' means premature end of options.
577 Skip it like a null option,
578 then exchange with previous non-options as if it were an option,
579 then skip everything else like a non-option. */
581 if (optind != argc && !strcmp (argv[optind], "--"))
585 if (first_nonopt != last_nonopt && last_nonopt != optind)
586 exchange ((char **) argv);
587 else if (first_nonopt == last_nonopt)
588 first_nonopt = optind;
594 /* If we have done all the ARGV-elements, stop the scan
595 and back over any non-options that we skipped and permuted. */
599 /* Set the next-arg-index to point at the non-options
600 that we previously skipped, so the caller will digest them. */
601 if (first_nonopt != last_nonopt)
602 optind = first_nonopt;
606 /* If we have come to a non-option and did not permute it,
607 either stop the scan or describe it to the caller and pass it by. */
611 if (ordering == REQUIRE_ORDER)
613 optarg = argv[optind++];
617 /* We have found another option-ARGV-element.
618 Skip the initial punctuation. */
620 nextchar = (argv[optind] + 1
621 + (longopts != NULL && argv[optind][1] == '-'));
624 /* Decode the current option-ARGV-element. */
626 /* Check whether the ARGV-element is a long option.
628 If long_only and the ARGV-element has the form "-f", where f is
629 a valid short option, don't consider it an abbreviated form of
630 a long option that starts with f. Otherwise there would be no
631 way to give the -f short option.
633 On the other hand, if there's a long option "fubar" and
634 the ARGV-element is "-fu", do consider that an abbreviation of
635 the long option, just like "--fu", and not "-f" with arg "u".
637 This distinction seems to be the most useful approach. */
640 && (argv[optind][1] == '-'
641 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
644 const struct option *p;
645 const struct option *pfound = NULL;
651 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
654 /* Test all long options for either exact match
655 or abbreviated matches. */
656 for (p = longopts, option_index = 0; p->name; p++, option_index++)
657 if (!strncmp (p->name, nextchar, nameend - nextchar))
659 if ((unsigned int) (nameend - nextchar)
660 == (unsigned int) strlen (p->name))
662 /* Exact match found. */
664 indfound = option_index;
668 else if (pfound == NULL)
670 /* First nonexact match found. */
672 indfound = option_index;
675 /* Second or later nonexact match found. */
682 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
683 argv[0], argv[optind]);
684 nextchar += strlen (nextchar);
692 option_index = indfound;
696 /* Don't test has_arg with >, because some C compilers don't
697 allow it to be used on enums. */
699 optarg = nameend + 1;
703 if (argv[optind - 1][1] == '-')
706 _("%s: option `--%s' doesn't allow an argument\n"),
707 argv[0], pfound->name);
709 /* +option or -option */
711 _("%s: option `%c%s' doesn't allow an argument\n"),
712 argv[0], argv[optind - 1][0], pfound->name);
714 nextchar += strlen (nextchar);
716 optopt = pfound->val;
720 else if (pfound->has_arg == 1)
723 optarg = argv[optind++];
728 _("%s: option `%s' requires an argument\n"),
729 argv[0], argv[optind - 1]);
730 nextchar += strlen (nextchar);
731 optopt = pfound->val;
732 return optstring[0] == ':' ? ':' : '?';
735 nextchar += strlen (nextchar);
737 *longind = option_index;
740 *(pfound->flag) = pfound->val;
746 /* Can't find it as a long option. If this is not getopt_long_only,
747 or the option starts with '--' or is not a valid short
748 option, then it's an error.
749 Otherwise interpret it as a short option. */
750 if (!long_only || argv[optind][1] == '-'
751 || my_index (optstring, *nextchar) == NULL)
755 if (argv[optind][1] == '-')
757 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
760 /* +option or -option */
761 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
762 argv[0], argv[optind][0], nextchar);
764 nextchar = (char *) "";
771 /* Look at and handle the next short option-character. */
774 char c = *nextchar++;
775 char *temp = my_index (optstring, c);
777 /* Increment `optind' when we start to process its last character. */
778 if (*nextchar == '\0')
781 if (temp == NULL || c == ':')
786 /* 1003.2 specifies the format of this message. */
787 fprintf (stderr, _("%s: illegal option -- %c\n"),
790 fprintf (stderr, _("%s: invalid option -- %c\n"),
796 /* Convenience. Treat POSIX -W foo same as long option --foo */
797 if (temp[0] == 'W' && temp[1] == ';')
800 const struct option *p;
801 const struct option *pfound = NULL;
807 /* This is an option that requires an argument. */
808 if (*nextchar != '\0')
811 /* If we end this ARGV-element by taking the rest as an arg,
812 we must advance to the next element now. */
815 else if (optind == argc)
819 /* 1003.2 specifies the format of this message. */
820 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
824 if (optstring[0] == ':')
831 /* We already incremented `optind' once;
832 increment it again when taking next ARGV-elt as argument. */
833 optarg = argv[optind++];
835 /* optarg is now the argument, see if it's in the
836 table of longopts. */
838 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
841 /* Test all long options for either exact match
842 or abbreviated matches. */
843 for (p = longopts, option_index = 0; p->name; p++, option_index++)
844 if (!strncmp (p->name, nextchar, nameend - nextchar))
846 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
848 /* Exact match found. */
850 indfound = option_index;
854 else if (pfound == NULL)
856 /* First nonexact match found. */
858 indfound = option_index;
861 /* Second or later nonexact match found. */
867 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
868 argv[0], argv[optind]);
869 nextchar += strlen (nextchar);
875 option_index = indfound;
878 /* Don't test has_arg with >, because some C compilers don't
879 allow it to be used on enums. */
881 optarg = nameend + 1;
885 fprintf (stderr, _("\
886 %s: option `-W %s' doesn't allow an argument\n"),
887 argv[0], pfound->name);
889 nextchar += strlen (nextchar);
893 else if (pfound->has_arg == 1)
896 optarg = argv[optind++];
901 _("%s: option `%s' requires an argument\n"),
902 argv[0], argv[optind - 1]);
903 nextchar += strlen (nextchar);
904 return optstring[0] == ':' ? ':' : '?';
907 nextchar += strlen (nextchar);
909 *longind = option_index;
912 *(pfound->flag) = pfound->val;
918 return 'W'; /* Let the application handle it. */
924 /* This is an option that accepts an argument optionally. */
925 if (*nextchar != '\0')
936 /* This is an option that requires an argument. */
937 if (*nextchar != '\0')
940 /* If we end this ARGV-element by taking the rest as an arg,
941 we must advance to the next element now. */
944 else if (optind == argc)
948 /* 1003.2 specifies the format of this message. */
950 _("%s: option requires an argument -- %c\n"),
954 if (optstring[0] == ':')
960 /* We already incremented `optind' once;
961 increment it again when taking next ARGV-elt as argument. */
962 optarg = argv[optind++];
971 getopt (argc, argv, optstring)
974 const char *optstring;
976 return _getopt_internal (argc, argv, optstring,
977 (const struct option *) 0,
982 #endif /* Not ELIDE_CODE. */
986 /* Compile with -DTEST to make an executable for use in testing
987 the above definition of `getopt'. */
995 int digit_optind = 0;
999 int this_option_optind = optind ? optind : 1;
1001 c = getopt (argc, argv, "abc:d:0123456789");
1017 if (digit_optind != 0 && digit_optind != this_option_optind)
1018 printf ("digits occur in two different argv-elements.\n");
1019 digit_optind = this_option_optind;
1020 printf ("option %c\n", c);
1024 printf ("option a\n");
1028 printf ("option b\n");
1032 printf ("option c with value `%s'\n", optarg);
1039 printf ("?? getopt returned character code 0%o ??\n", c);
1045 printf ("non-option ARGV-elements: ");
1046 while (optind < argc)
1047 printf ("%s ", argv[optind++]);