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Diffstat (limited to 'src/util/getopt.c')
| -rw-r--r-- | src/util/getopt.c | 1050 |
1 files changed, 1050 insertions, 0 deletions
diff --git a/src/util/getopt.c b/src/util/getopt.c new file mode 100644 index 0000000..1699498 --- /dev/null +++ b/src/util/getopt.c @@ -0,0 +1,1050 @@ +/* Getopt for GNU. + NOTE: getopt is now part of the C library, so if you don't know what + "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu + before changing it! + + Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97 + Free Software Foundation, Inc. + +NOTE: The canonical source of this file is maintained with the GNU C Library. +Bugs can be reported to bug-glibc@prep.ai.mit.edu. + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, +USA. + + +This code was heavily modified for GNUnet. +Copyright (C) 2006 Christian Grothoff +*/ + +/** + * @file util/getopt.c + * @brief GNU style option parsing + * + * TODO: get rid of statics (make reentrant) and + * replace main GNU getopt parser with one that + * actually fits our API. + */ + +#include "platform.h" +#include "gnunet_common.h" +#include "gnunet_getopt_lib.h" + +#ifdef VMS +#include <unixlib.h> +#if HAVE_STRING_H - 0 +#include <string.h> +#endif +#endif + +#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__) + +#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall) + +#if defined (WIN32) && !defined (__CYGWIN32__) +/* It's not Unix, really. See? Capital letters. */ +#include <windows.h> +#define getpid() GetCurrentProcessId() +#endif + +#ifndef _ +/* This is for other GNU distributions with internationalized messages. + When compiling libc, the _ macro is predefined. */ +#ifdef HAVE_LIBINTL_H +#include <libintl.h> +#define _(msgid) gettext (msgid) +#else +#define _(msgid) (msgid) +#endif +#endif + +/* Describe the long-named options requested by the application. + The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector + of `struct GNoption' terminated by an element containing a name which is + zero. + + The field `has_arg' is: + no_argument (or 0) if the option does not take an argument, + required_argument (or 1) if the option requires an argument, + optional_argument (or 2) if the option takes an optional argument. + + If the field `flag' is not NULL, it points to a variable that is set + to the value given in the field `val' when the option is found, but + left unchanged if the option is not found. + + To have a long-named option do something other than set an `int' to + a compiled-in constant, such as set a value from `GNoptarg', set the + option's `flag' field to zero and its `val' field to a nonzero + value (the equivalent single-letter option character, if there is + one). For long options that have a zero `flag' field, `getopt' + returns the contents of the `val' field. */ + +struct GNoption +{ + const char *name; + /* has_arg can't be an enum because some compilers complain about + * type mismatches in all the code that assumes it is an int. */ + int has_arg; + int *flag; + int val; +}; + + +/* This version of `getopt' appears to the caller like standard Unix `getopt' + but it behaves differently for the user, since it allows the user + to intersperse the options with the other arguments. + + As `getopt' works, it permutes the elements of ARGV so that, + when it is done, all the options precede everything else. Thus + all application programs are extended to handle flexible argument order. + + Setting the environment variable POSIXLY_CORRECT disables permutation. + Then the behavior is completely standard. + + GNU application programs can use a third alternative mode in which + they can distinguish the relative order of options and other arguments. */ + +/* For communication from `getopt' to the caller. + When `getopt' finds an option that takes an argument, + the argument value is returned here. + Also, when `ordering' is RETURN_IN_ORDER, + each non-option ARGV-element is returned here. */ + +static char *GNoptarg = NULL; + +/* Index in ARGV of the next element to be scanned. + This is used for communication to and from the caller + and for communication between successive calls to `getopt'. + + On entry to `getopt', zero means this is the first call; initialize. + + When `getopt' returns -1, this is the index of the first of the + non-option elements that the caller should itself scan. + + Otherwise, `GNoptind' communicates from one call to the next + how much of ARGV has been scanned so far. */ + +/* 1003.2 says this must be 1 before any call. */ +static int GNoptind = 1; + +/* The next char to be scanned in the option-element + in which the last option character we returned was found. + This allows us to pick up the scan where we left off. + + If this is zero, or a null string, it means resume the scan + by advancing to the next ARGV-element. */ + +static char *nextchar; + + +/* Describe how to deal with options that follow non-option ARGV-elements. + + If the caller did not specify anything, + the default is REQUIRE_ORDER if the environment variable + POSIXLY_CORRECT is defined, PERMUTE otherwise. + + REQUIRE_ORDER means don't recognize them as options; + stop option processing when the first non-option is seen. + This is what Unix does. + This mode of operation is selected by either setting the environment + variable POSIXLY_CORRECT, or using `+' as the first character + of the list of option characters. + + PERMUTE is the default. We GNUNET_CRYPTO_random_permute the contents of ARGV as we scan, + so that eventually all the non-options are at the end. This allows options + to be given in any order, even with programs that were not written to + expect this. + + RETURN_IN_ORDER is an option available to programs that were written + to expect GNoptions and other ARGV-elements in any order and that care about + the ordering of the two. We describe each non-option ARGV-element + as if it were the argument of an option with character code 1. + Using `-' as the first character of the list of option characters + selects this mode of operation. + + The special argument `--' forces an end of option-scanning regardless + of the value of `ordering'. In the case of RETURN_IN_ORDER, only + `--' can cause `getopt' to return -1 with `GNoptind' != ARGC. */ + +static enum +{ + REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER +} ordering; + +/* Value of POSIXLY_CORRECT environment variable. */ +static char *posixly_correct; + +#ifdef __GNU_LIBRARY__ +/* We want to avoid inclusion of string.h with non-GNU libraries + because there are many ways it can cause trouble. + On some systems, it contains special magic macros that don't work + in GCC. */ +#include <string.h> +#define my_index strchr +#else + +/* Avoid depending on library functions or files + whose names are inconsistent. */ + +char * +getenv (); + +static char * +my_index (str, chr) + const char *str; + int chr; +{ + while (*str) + { + if (*str == chr) + return (char *) str; + str++; + } + return 0; +} + +/* If using GCC, we can safely declare strlen this way. + If not using GCC, it is ok not to declare it. */ +#ifdef __GNUC__ +/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. + That was relevant to code that was here before. */ +#if !defined (__STDC__) || !__STDC__ +/* gcc with -traditional declares the built-in strlen to return int, + and has done so at least since version 2.4.5. -- rms. */ +extern int +strlen (const char *); +#endif /* not __STDC__ */ +#endif /* __GNUC__ */ + +#endif /* not __GNU_LIBRARY__ */ + +/* Handle permutation of arguments. */ + +/* Describe the part of ARGV that contains non-options that have + been skipped. `first_nonopt' is the index in ARGV of the first of them; + `last_nonopt' is the index after the last of them. */ + +static int first_nonopt; +static int last_nonopt; + +#ifdef _LIBC +/* Bash 2.0 gives us an environment variable containing flags + indicating ARGV elements that should not be considered arguments. */ + +/* Defined in getopt_init.c */ +extern char *__getopt_nonoption_flags; + +static int nonoption_flags_max_len; +static int nonoption_flags_len; + +static int original_argc; +static char *const *original_argv; + +extern pid_t __libc_pid; + +/* Make sure the environment variable bash 2.0 puts in the environment + is valid for the getopt call we must make sure that the ARGV passed + to getopt is that one passed to the process. */ +static void GNUNET_UNUSED +store_args_and_env (int argc, char *const *argv) +{ + /* XXX This is no good solution. We should rather copy the args so + * that we can compare them later. But we must not use malloc(3). */ + original_argc = argc; + original_argv = argv; +} + +text_set_element (__libc_subinit, store_args_and_env); + +#define SWAP_FLAGS(ch1, ch2) \ + if (nonoption_flags_len > 0) \ + { \ + char __tmp = __getopt_nonoption_flags[ch1]; \ + __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ + __getopt_nonoption_flags[ch2] = __tmp; \ + } +#else /* !_LIBC */ +#define SWAP_FLAGS(ch1, ch2) +#endif /* _LIBC */ + +/* Exchange two adjacent subsequences of ARGV. + One subsequence is elements [first_nonopt,last_nonopt) + which contains all the non-options that have been skipped so far. + The other is elements [last_nonopt,GNoptind), which contains all + the options processed since those non-options were skipped. + + `first_nonopt' and `last_nonopt' are relocated so that they describe + the new indices of the non-options in ARGV after they are moved. */ + +#if defined (__STDC__) && __STDC__ +static void +exchange (char **); +#endif + +static void +exchange (argv) + char **argv; +{ + int bottom = first_nonopt; + int middle = last_nonopt; + int top = GNoptind; + char *tem; + + /* Exchange the shorter segment with the far end of the longer segment. + * That puts the shorter segment into the right place. + * It leaves the longer segment in the right place overall, + * but it consists of two parts that need to be swapped next. */ + +#ifdef _LIBC + /* First make sure the handling of the `__getopt_nonoption_flags' + * string can work normally. Our top argument must be in the range + * of the string. */ + if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) + { + /* We must extend the array. The user plays games with us and + * presents new arguments. */ + char *new_str = malloc (top + 1); + + if (new_str == NULL) + nonoption_flags_len = nonoption_flags_max_len = 0; + else + { + memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len); + memset (&new_str[nonoption_flags_max_len], '\0', + top + 1 - nonoption_flags_max_len); + nonoption_flags_max_len = top + 1; + __getopt_nonoption_flags = new_str; + } + } +#endif + + while (top > middle && middle > bottom) + { + if (top - middle > middle - bottom) + { + /* Bottom segment is the short one. */ + int len = middle - bottom; + register int i; + + /* Swap it with the top part of the top segment. */ + for (i = 0; i < len; i++) + { + tem = argv[bottom + i]; + argv[bottom + i] = argv[top - (middle - bottom) + i]; + argv[top - (middle - bottom) + i] = tem; + SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); + } + /* Exclude the moved bottom segment from further swapping. */ + top -= len; + } + else + { + /* Top segment is the short one. */ + int len = top - middle; + register int i; + + /* Swap it with the bottom part of the bottom segment. */ + for (i = 0; i < len; i++) + { + tem = argv[bottom + i]; + argv[bottom + i] = argv[middle + i]; + argv[middle + i] = tem; + SWAP_FLAGS (bottom + i, middle + i); + } + /* Exclude the moved top segment from further swapping. */ + bottom += len; + } + } + + /* Update records for the slots the non-options now occupy. */ + + first_nonopt += (GNoptind - last_nonopt); + last_nonopt = GNoptind; +} + +/* Initialize the internal data when the first call is made. */ + +#if defined (__STDC__) && __STDC__ +static const char * +_getopt_initialize (int, char *const *, const char *); +#endif +static const char * +_getopt_initialize (argc, argv, optstring) + int argc; + char *const *argv; + const char *optstring; +{ + /* Start processing options with ARGV-element 1 (since ARGV-element 0 + * is the program name); the sequence of previously skipped + * non-option ARGV-elements is empty. */ + + first_nonopt = last_nonopt = GNoptind; + + nextchar = NULL; + + posixly_correct = getenv ("POSIXLY_CORRECT"); + + /* Determine how to handle the ordering of options and nonoptions. */ + + if (optstring[0] == '-') + { + ordering = RETURN_IN_ORDER; + ++optstring; + } + else if (optstring[0] == '+') + { + ordering = REQUIRE_ORDER; + ++optstring; + } + else if (posixly_correct != NULL) + ordering = REQUIRE_ORDER; + else + ordering = PERMUTE; + +#ifdef _LIBC + if (posixly_correct == NULL && argc == original_argc && argv == original_argv) + { + if (nonoption_flags_max_len == 0) + { + if (__getopt_nonoption_flags == NULL || + __getopt_nonoption_flags[0] == '\0') + nonoption_flags_max_len = -1; + else + { + const char *orig_str = __getopt_nonoption_flags; + int len = nonoption_flags_max_len = strlen (orig_str); + + if (nonoption_flags_max_len < argc) + nonoption_flags_max_len = argc; + __getopt_nonoption_flags = (char *) malloc (nonoption_flags_max_len); + if (__getopt_nonoption_flags == NULL) + nonoption_flags_max_len = -1; + else + { + memcpy (__getopt_nonoption_flags, orig_str, len); + memset (&__getopt_nonoption_flags[len], '\0', + nonoption_flags_max_len - len); + } + } + } + nonoption_flags_len = nonoption_flags_max_len; + } + else + nonoption_flags_len = 0; +#endif + + return optstring; +} + +/* Scan elements of ARGV (whose length is ARGC) for option characters + given in OPTSTRING. + + If an element of ARGV starts with '-', and is not exactly "-" or "--", + then it is an option element. The characters of this element + (aside from the initial '-') are option characters. If `getopt' + is called repeatedly, it returns successively each of the option characters + from each of the option elements. + + If `getopt' finds another option character, it returns that character, + updating `GNoptind' and `nextchar' so that the next call to `getopt' can + resume the scan with the following option character or ARGV-element. + + If there are no more option characters, `getopt' returns -1. + Then `GNoptind' is the index in ARGV of the first ARGV-element + that is not an option. (The ARGV-elements have been permuted + so that those that are not options now come last.) + + OPTSTRING is a string containing the legitimate option characters. + If an option character is seen that is not listed in OPTSTRING, + return '?' after printing an error message. If you set `GNopterr' to + zero, the error message is suppressed but we still return '?'. + + If a char in OPTSTRING is followed by a colon, that means it wants an arg, + so the following text in the same ARGV-element, or the text of the following + ARGV-element, is returned in `GNoptarg'. Two colons mean an option that + wants an optional arg; if there is text in the current ARGV-element, + it is returned in `GNoptarg', otherwise `GNoptarg' is set to zero. + + If OPTSTRING starts with `-' or `+', it requests different methods of + handling the non-option ARGV-elements. + See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. + + Long-named options begin with `--' instead of `-'. + Their names may be abbreviated as long as the abbreviation is unique + or is an exact match for some defined option. If they have an + argument, it follows the option name in the same ARGV-element, separated + from the option name by a `=', or else the in next ARGV-element. + When `getopt' finds a long-named option, it returns 0 if that option's + `flag' field is nonzero, the value of the option's `val' field + if the `flag' field is zero. + + The elements of ARGV aren't really const, because we GNUNET_CRYPTO_random_permute them. + But we pretend they're const in the prototype to be compatible + with other systems. + + LONGOPTS is a vector of `struct GNoption' terminated by an + element containing a name which is zero. + + LONGIND returns the index in LONGOPT of the long-named option found. + It is only valid when a long-named option has been found by the most + recent call. + + If LONG_ONLY is nonzero, '-' as well as '--' can introduce + long-named options. */ + +static int +GN_getopt_internal (int argc, char *const *argv, const char *optstring, + const struct GNoption *longopts, int *longind, + int long_only) +{ + static int __getopt_initialized = 0; + static int GNopterr = 1; + + GNoptarg = NULL; + + if (GNoptind == 0 || !__getopt_initialized) + { + if (GNoptind == 0) + GNoptind = 1; /* Don't scan ARGV[0], the program name. */ + optstring = _getopt_initialize (argc, argv, optstring); + __getopt_initialized = 1; + } + + /* Test whether ARGV[GNoptind] points to a non-option argument. + * Either it does not have option syntax, or there is an environment flag + * from the shell indicating it is not an option. The later information + * is only used when the used in the GNU libc. */ +#ifdef _LIBC +#define NONOPTION_P (argv[GNoptind][0] != '-' || argv[GNoptind][1] == '\0' \ + || (GNoptind < nonoption_flags_len \ + && __getopt_nonoption_flags[GNoptind] == '1')) +#else +#define NONOPTION_P (argv[GNoptind][0] != '-' || argv[GNoptind][1] == '\0') +#endif + + if (nextchar == NULL || *nextchar == '\0') + { + /* Advance to the next ARGV-element. */ + + /* Give FIRST_NONOPT & LAST_NONOPT rational values if GNoptind has been + * moved back by the user (who may also have changed the arguments). */ + if (last_nonopt > GNoptind) + last_nonopt = GNoptind; + if (first_nonopt > GNoptind) + first_nonopt = GNoptind; + + if (ordering == PERMUTE) + { + /* If we have just processed some options following some non-options, + * exchange them so that the options come first. */ + + if (first_nonopt != last_nonopt && last_nonopt != GNoptind) + exchange ((char **) argv); + else if (last_nonopt != GNoptind) + first_nonopt = GNoptind; + + /* Skip any additional non-options + * and extend the range of non-options previously skipped. */ + + while (GNoptind < argc && NONOPTION_P) + GNoptind++; + last_nonopt = GNoptind; + } + + /* The special ARGV-element `--' means premature end of options. + * Skip it like a null option, + * then exchange with previous non-options as if it were an option, + * then skip everything else like a non-option. */ + if (GNoptind != argc && !strcmp (argv[GNoptind], "--")) + { + GNoptind++; + + if (first_nonopt != last_nonopt && last_nonopt != GNoptind) + exchange ((char **) argv); + else if (first_nonopt == last_nonopt) + first_nonopt = GNoptind; + last_nonopt = argc; + + GNoptind = argc; + } + + /* If we have done all the ARGV-elements, stop the scan + * and back over any non-options that we skipped and permuted. */ + + if (GNoptind == argc) + { + /* Set the next-arg-index to point at the non-options + * that we previously skipped, so the caller will digest them. */ + if (first_nonopt != last_nonopt) + GNoptind = first_nonopt; + return -1; + } + + /* If we have come to a non-option and did not permute it, + * either stop the scan or describe it to the caller and pass it by. */ + + if (NONOPTION_P) + { + if (ordering == REQUIRE_ORDER) + return -1; + GNoptarg = argv[GNoptind++]; + return 1; + } + + /* We have found another option-ARGV-element. + * Skip the initial punctuation. */ + + nextchar = + (argv[GNoptind] + 1 + (longopts != NULL && argv[GNoptind][1] == '-')); + } + + /* Decode the current option-ARGV-element. */ + + /* Check whether the ARGV-element is a long option. + * + * If long_only and the ARGV-element has the form "-f", where f is + * a valid short option, don't consider it an abbreviated form of + * a long option that starts with f. Otherwise there would be no + * way to give the -f short option. + * + * On the other hand, if there's a long option "fubar" and + * the ARGV-element is "-fu", do consider that an abbreviation of + * the long option, just like "--fu", and not "-f" with arg "u". + * + * This distinction seems to be the most useful approach. */ + + if (longopts != NULL && + (argv[GNoptind][1] == '-' || + (long_only && + (argv[GNoptind][2] || !my_index (optstring, argv[GNoptind][1]))))) + { + char *nameend; + const struct GNoption *p; + const struct GNoption *pfound = NULL; + int exact = 0; + int ambig = 0; + int indfound = -1; + int option_index; + + for (nameend = nextchar; *nameend && *nameend != '='; nameend++) + /* Do nothing. */ ; + + /* Test all long options for either exact match + * or abbreviated matches. */ + for (p = longopts, option_index = 0; p->name; p++, option_index++) + if (!strncmp (p->name, nextchar, nameend - nextchar)) + { + if ((unsigned int) (nameend - nextchar) == + (unsigned int) strlen (p->name)) + { + /* Exact match found. */ + pfound = p; + indfound = option_index; + exact = 1; + break; + } + else if (pfound == NULL) + { + /* First nonexact match found. */ + pfound = p; + indfound = option_index; + } + else + /* Second or later nonexact match found. */ + ambig = 1; + } + + if (ambig && !exact) + { + if (GNopterr) + FPRINTF (stderr, _("%s: option `%s' is ambiguous\n"), argv[0], + argv[GNoptind]); + nextchar += strlen (nextchar); + GNoptind++; + return '?'; + } + + if (pfound != NULL) + { + option_index = indfound; + GNoptind++; + if (*nameend) + { + /* Don't test has_arg with >, because some C compilers don't + * allow it to be used on enums. */ + if (pfound->has_arg) + GNoptarg = nameend + 1; + else + { + if (GNopterr) + { + if (argv[GNoptind - 1][1] == '-') + /* --option */ + FPRINTF (stderr, + _("%s: option `--%s' does not allow an argument\n"), + argv[0], pfound->name); + else + /* +option or -option */ + FPRINTF (stderr, + _("%s: option `%c%s' does not allow an argument\n"), + argv[0], argv[GNoptind - 1][0], pfound->name); + } + nextchar += strlen (nextchar); + return '?'; + } + } + else if (pfound->has_arg == 1) + { + if (GNoptind < argc) + { + GNoptarg = argv[GNoptind++]; + } + else + { + if (GNopterr) + { + FPRINTF (stderr, _("%s: option `%s' requires an argument\n"), + argv[0], argv[GNoptind - 1]); + } + nextchar += strlen (nextchar); + return (optstring[0] == ':') ? ':' : '?'; + } + } + nextchar += strlen (nextchar); + if (longind != NULL) + *longind = option_index; + if (pfound->flag) + { + *(pfound->flag) = pfound->val; + return 0; + } + return pfound->val; + } + + /* Can't find it as a long option. If this is not getopt_long_only, + * or the option starts with '--' or is not a valid short + * option, then it's an error. + * Otherwise interpret it as a short option. */ + if (!long_only || argv[GNoptind][1] == '-' || + my_index (optstring, *nextchar) == NULL) + { + if (GNopterr) + { + if (argv[GNoptind][1] == '-') + /* --option */ + FPRINTF (stderr, _("%s: unrecognized option `--%s'\n"), argv[0], + nextchar); + else + /* +option or -option */ + FPRINTF (stderr, _("%s: unrecognized option `%c%s'\n"), argv[0], + argv[GNoptind][0], nextchar); + } + nextchar = (char *) ""; + GNoptind++; + return '?'; + } + } + + /* Look at and handle the next short option-character. */ + + { + char c = *nextchar++; + char *temp = my_index (optstring, c); + + /* Increment `GNoptind' when we start to process its last character. */ + if (*nextchar == '\0') + ++GNoptind; + + if (temp == NULL || c == ':') + { + if (GNopterr) + { + if (posixly_correct) + /* 1003.2 specifies the format of this message. */ + FPRINTF (stderr, _("%s: illegal option -- %c\n"), argv[0], c); + else + FPRINTF (stderr, _("%s: invalid option -- %c\n"), argv[0], c); + } + return '?'; + } + /* Convenience. Treat POSIX -W foo same as long option --foo */ + if (temp[0] == 'W' && temp[1] == ';') + { + char *nameend; + const struct GNoption *p; + const struct GNoption *pfound = NULL; + int exact = 0; + int ambig = 0; + int indfound = 0; + int option_index; + + /* This is an option that requires an argument. */ + if (*nextchar != '\0') + { + GNoptarg = nextchar; + /* If we end this ARGV-element by taking the rest as an arg, + * we must advance to the next element now. */ + GNoptind++; + } + else if (GNoptind == argc) + { + if (GNopterr) + { + /* 1003.2 specifies the format of this message. */ + FPRINTF (stderr, _("%s: option requires an argument -- %c\n"), + argv[0], c); + } + if (optstring[0] == ':') + c = ':'; + else + c = '?'; + return c; + } + else + /* We already incremented `GNoptind' once; + * increment it again when taking next ARGV-elt as argument. */ + GNoptarg = argv[GNoptind++]; + + /* GNoptarg is now the argument, see if it's in the + * table of longopts. */ + + for (nextchar = nameend = GNoptarg; *nameend && *nameend != '='; + nameend++) + /* Do nothing. */ ; + + /* Test all long options for either exact match + * or abbreviated matches. */ + if (longopts != NULL) + for (p = longopts, option_index = 0; p->name; p++, option_index++) + if (!strncmp (p->name, nextchar, nameend - nextchar)) + { + if ((unsigned int) (nameend - nextchar) == strlen (p->name)) + { + /* Exact match found. */ + pfound = p; + indfound = option_index; + exact = 1; + break; + } + else if (pfound == NULL) + { + /* First nonexact match found. */ + pfound = p; + indfound = option_index; + } + else + /* Second or later nonexact match found. */ + ambig = 1; + } + if (ambig && !exact) + { + if (GNopterr) + FPRINTF (stderr, _("%s: option `-W %s' is ambiguous\n"), argv[0], + argv[GNoptind]); + nextchar += strlen (nextchar); + GNoptind++; + return '?'; + } + if (pfound != NULL) + { + option_index = indfound; + if (*nameend) + { + /* Don't test has_arg with >, because some C compilers don't + * allow it to be used on enums. */ + if (pfound->has_arg) + GNoptarg = nameend + 1; + else + { + if (GNopterr) + FPRINTF (stderr, _("\ +%s: option `-W %s' does not allow an argument\n"), argv[0], pfound->name); + + nextchar += strlen (nextchar); + return '?'; + } + } + else if (pfound->has_arg == 1) + { + if (GNoptind < argc) + GNoptarg = argv[GNoptind++]; + else + { + if (GNopterr) + FPRINTF (stderr, _("%s: option `%s' requires an argument\n"), + argv[0], argv[GNoptind - 1]); + nextchar += strlen (nextchar); + return optstring[0] == ':' ? ':' : '?'; + } + } + nextchar += strlen (nextchar); + if (longind != NULL) + *longind = option_index; + if (pfound->flag) + { + *(pfound->flag) = pfound->val; + return 0; + } + return pfound->val; + } + nextchar = NULL; + return 'W'; /* Let the application handle it. */ + } + if (temp[1] == ':') + { + if (temp[2] == ':') + { + /* This is an option that accepts an argument optionally. */ + if (*nextchar != '\0') + { + GNoptarg = nextchar; + GNoptind++; + } + else + GNoptarg = NULL; + nextchar = NULL; + } + else + { + /* This is an option that requires an argument. */ + if (*nextchar != '\0') + { + GNoptarg = nextchar; + /* If we end this ARGV-element by taking the rest as an arg, + * we must advance to the next element now. */ + GNoptind++; + } + else if (GNoptind == argc) + { + if (GNopterr) + { + /* 1003.2 specifies the format of this message. */ + FPRINTF (stderr, _("%s: option requires an argument -- %c\n"), + argv[0], c); + } + if (optstring[0] == ':') + c = ':'; + else + c = '?'; + } + else + /* We already incremented `GNoptind' once; + * increment it again when taking next ARGV-elt as argument. */ + GNoptarg = argv[GNoptind++]; + nextchar = NULL; + } + } + return c; + } +} + +static int +GNgetopt_long (int argc, char *const *argv, const char *options, + const struct GNoption *long_options, int *opt_index) +{ + return GN_getopt_internal (argc, argv, options, long_options, opt_index, 0); +} + +/* ******************** now the GNUnet specific modifications... ********************* */ + +/** + * Parse the command line. + * + * @param binaryOptions Name of application with option summary + * @param allOptions defined options and handlers + * @param argc number of arguments + * @param argv actual arguments + * @return index into argv with first non-option + * argument, or -1 on error + */ +int +GNUNET_GETOPT_run (const char *binaryOptions, + const struct GNUNET_GETOPT_CommandLineOption *allOptions, + unsigned int argc, char *const *argv) +{ + struct GNoption *long_options; + struct GNUNET_GETOPT_CommandLineProcessorContext clpc; + int count; + int i; + char *shorts; + int spos; + int cont; + int c; + + GNUNET_assert (argc > 0); + GNoptind = 0; + clpc.binaryName = argv[0]; + clpc.binaryOptions = binaryOptions; + clpc.allOptions = allOptions; + clpc.argv = argv; + clpc.argc = argc; + count = 0; + while (allOptions[count].name != NULL) + count++; + long_options = GNUNET_malloc (sizeof (struct GNoption) * (count + 1)); + shorts = GNUNET_malloc (count * 2 + 1); + spos = 0; + for (i = 0; i < count; i++) + { + long_options[i].name = allOptions[i].name; + long_options[i].has_arg = allOptions[i].require_argument; + long_options[i].flag = NULL; + long_options[i].val = allOptions[i].shortName; + shorts[spos++] = allOptions[i].shortName; + if (allOptions[i].require_argument != 0) + shorts[spos++] = ':'; + } + long_options[count].name = NULL; + long_options[count].has_arg = 0; + long_options[count].flag = NULL; + long_options[count].val = '\0'; + shorts[spos] = '\0'; + cont = GNUNET_OK; + /* main getopt loop */ + while (cont == GNUNET_OK) + { + int option_index = 0; + + c = GNgetopt_long (argc, argv, shorts, long_options, &option_index); + + if (c == GNUNET_SYSERR) + break; /* No more flags to process */ + + for (i = 0; i < count; i++) + { + clpc.currentArgument = GNoptind - 1; + if ((char) c == allOptions[i].shortName) + { + cont = + allOptions[i].processor (&clpc, allOptions[i].scls, + allOptions[i].name, GNoptarg); + break; + } + } + if (i == count) + { + FPRINTF (stderr, _("Use %s to get a list of options.\n"), "--help"); + cont = GNUNET_SYSERR; + } + } + + GNUNET_free (shorts); + GNUNET_free (long_options); + if (cont == GNUNET_SYSERR) + return GNUNET_SYSERR; + return GNoptind; +} + +/* end of getopt.c */ |