getopt/trunk/getopt.c

/*
 *  getopt.c - Enhanced implementation of BSD getopt(1)
 *  Copyright (c) 1997-2014 Frodo Looijaard <frodo@frodo.looijaard.name>
 *
 *  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 of the License, 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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/*
 * Version 1.0-b4: Tue Sep 23 1997. First public release.
 * Version 1.0: Wed Nov 19 1997.
 *   Bumped up the version number to 1.0
 *   Fixed minor typo (CSH instead of TCSH)
 * Version 1.0.1: Tue Jun 3 1998
 *   Fixed sizeof instead of strlen bug
 *   Bumped up the version number to 1.0.1
 * Version 1.0.2: Thu Jun 11 1998 (not present)
 *   Fixed gcc-2.8.1 warnings
 *   Fixed --version/-V option (not present)
 * Version 1.0.5: Tue Jun 22 1999
 *   Make -u option work (not present)
 * Version 1.0.6: Tue Jun 27 2000
 *   No important changes
 * Version 1.1.0: Tue Jun 30 2000
 *   Added NLS support (partly written by Arkadiusz Miśkiewicz
 *     <misiek@pld.org.pl>)
 * Version 1.1.4: Mon Nov 7 2005
 *   Fixed a few type's in the manpage
 * Version 1.1.5: Sun Aug 12 2012
 *  Sync with util-linux-2.21, fixed build problems, many new translations
 * Version 1.1.6: ??? 2014
 *  Sync with util-linux git 20141120, detect ambiguous long options, fix
 *  backslash problem in tcsh
 */

/* Exit codes:
 *   0) No errors, successful operation.
 *   1) getopt(3) returned an error.
 *   2) A problem with parameter parsing for getopt(1).
 *   3) Internal error, out of memory
 *   4) Returned for -T
 */
#define GETOPT_EXIT_CODE        1
#define PARAMETER_EXIT_CODE     2
#define XALLOC_EXIT_CODE        3
#define TEST_EXIT_CODE          4

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>

#if LIBCGETOPT
#include <getopt.h>
#else
#include "getopt.h"
#endif

#include "util-linux-compat.h"
#include "nls.h"
#include "xalloc.h"

/* NON_OPT is the code that is returned when a non-option is found in '+'
 * mode */
#define NON_OPT 1
/* LONG_OPT is the code that is returned when a long option is found. */
#define LONG_OPT 0

/* The shells recognized. */
typedef enum { BASH, TCSH } shell_t;


/* Some global variables that tells us how to parse. */
static shell_t shell = BASH;    /* The shell we generate output for. */
static int quiet_errors = 0;    /* 0 is not quiet. */
static int quiet_output = 0;    /* 0 is not quiet. */
static int quote = 1;           /* 1 is do quote. */

/* Allow changing which getopt is in use with function pointer */
int (*getopt_long_fp) (int argc, char *const *argv, const char *optstr,
                       const struct option * longopts, int *longindex);

/* Function prototypes */
static const char *normalize(const char *arg);
static int generate_output(char *argv[], int argc, const char *optstr,
                           const struct option *longopts);
static void parse_error(const char *message);
static void add_long_options(char *options);
static void add_longopt(const char *name, int has_arg);
static void print_help(void);
static void set_shell(const char *new_shell);

/*
 * This function 'normalizes' a single argument: it puts single quotes
 * around it and escapes other special characters. If quote is false, it
 * just returns its argument.
 *
 * Bash only needs special treatment for single quotes; tcsh also recognizes
 * exclamation marks within single quotes, and nukes whitespace. This
 * function returns a pointer to a buffer that is overwritten by each call.
 */
static const char *normalize(const char *arg)
{
        static char *BUFFER = NULL;
        const char *argptr = arg;
        char *bufptr;

        free(BUFFER);

        if (!quote) {
                /* Just copy arg */
                BUFFER = xmalloc(strlen(arg) + 1);
                strcpy(BUFFER, arg);
                return BUFFER;
        }

        /*
         * Each character in arg may take up to four characters in the
         * result: For a quote we need a closing quote, a backslash, a quote
         * and an opening quote! We need also the global opening and closing
         * quote, and one extra character for '\0'.
         */
        BUFFER = xmalloc(strlen(arg) * 4 + 3);

        bufptr = BUFFER;
        *bufptr++ = '\'';

        while (*argptr) {
                if (*argptr == '\'') {
                        /* Quote: replace it with: '\'' */
                        *bufptr++ = '\'';
                        *bufptr++ = '\\';
                        *bufptr++ = '\'';
                        *bufptr++ = '\'';
                } else if (shell == TCSH && *argptr == '\\') {
                        /* Backslash: replace it with: '\\' */
                        *bufptr++ = '\\';
                        *bufptr++ = '\\';
                } else if (shell == TCSH && *argptr == '!') {
                        /* Exclamation mark: replace it with: \! */
                        *bufptr++ = '\'';
                        *bufptr++ = '\\';
                        *bufptr++ = '!';
                        *bufptr++ = '\'';
                } else if (shell == TCSH && *argptr == '\n') {
                        /* Newline: replace it with: \n */
                        *bufptr++ = '\\';
                        *bufptr++ = 'n';
                } else if (shell == TCSH && isspace(*argptr)) {
                        /* Non-newline whitespace: replace it with \<ws> */
                        *bufptr++ = '\'';
                        *bufptr++ = '\\';
                        *bufptr++ = *argptr;
                        *bufptr++ = '\'';
                } else
                        /* Just copy */
                        *bufptr++ = *argptr;
                argptr++;
        }
        *bufptr++ = '\'';
        *bufptr++ = '\0';
        return BUFFER;
}

/*
 * Generate the output. argv[0] is the program name (used for reporting errors).
 * argv[1..] contains the options to be parsed. argc must be the number of
 * elements in argv (ie. 1 if there are no options, only the program name),
 * optstr must contain the short options, and longopts the long options.
 * Other settings are found in global variables.
 */
static int generate_output(char *argv[], int argc, const char *optstr,
                           const struct option *longopts)
{
        int exit_code = EXIT_SUCCESS;   /* Assume everything will be OK */
        int opt;
        int longindex;
        const char *charptr;

        if (quiet_errors)
                /* No error reporting from getopt(3) */
                opterr = 0;
        /* Reset getopt(3) */
        optind = 0;

        while ((opt =
                (getopt_long_fp(argc, argv, optstr, longopts, &longindex)))
               != EOF)
                if (opt == '?' || opt == ':')
                        exit_code = GETOPT_EXIT_CODE;
                else if (!quiet_output) {
                        if (opt == LONG_OPT) {
                                printf(" --%s", longopts[longindex].name);
                                if (longopts[longindex].has_arg)
                                        printf(" %s", normalize(optarg ? optarg : ""));
                        } else if (opt == NON_OPT)
                                printf(" %s", normalize(optarg ? optarg : ""));
                        else {
                                printf(" -%c", opt);
                                charptr = strchr(optstr, opt);
                                if (charptr != NULL && *++charptr == ':')
                                        printf(" %s", normalize(optarg ? optarg : ""));
                        }
                }

        if (!quiet_output) {
                printf(" --");
                while (optind < argc)
                        printf(" %s", normalize(argv[optind++]));
                printf("\n");
        }
        return exit_code;
}

/*
 * Report an error when parsing getopt's own arguments. If message is NULL,
 * we already sent a message, we just exit with a helpful hint.
 */
static void __attribute__ ((__noreturn__)) parse_error(const char *message)
{
        if (message)
                warnx("%s", message);
        fprintf(stderr, _("Try `%s --help' for more information.\n"),
                program_invocation_short_name);
        exit(PARAMETER_EXIT_CODE);
}

static struct option *long_options = NULL;
static int long_options_length = 0;     /* Length of array */
static int long_options_nr = 0;         /* Nr of used elements in array */
#define LONG_OPTIONS_INCR 10
#define init_longopt() add_longopt(NULL,0)

/* Register a long option. The contents of name is copied. */
static void add_longopt(const char *name, int has_arg)
{
        char *tmp;
        static int flag;

        if (!name) {
                /* init */
                free(long_options);
                long_options = NULL;
                long_options_length = 0;
                long_options_nr = 0;
        }

        if (long_options_nr == long_options_length) {
                long_options_length += LONG_OPTIONS_INCR;
                long_options = xrealloc(long_options,
                                        sizeof(struct option) *
                                        long_options_length);
        }

        long_options[long_options_nr].name = NULL;
        long_options[long_options_nr].has_arg = 0;
        long_options[long_options_nr].flag = NULL;
        long_options[long_options_nr].val = 0;

        if (long_options_nr && name) {
                /* Not for init! */
                long_options[long_options_nr - 1].has_arg = has_arg;
                long_options[long_options_nr - 1].flag = &flag;
                long_options[long_options_nr - 1].val = long_options_nr;
                tmp = xmalloc(strlen(name) + 1);
                strcpy(tmp, name);
                long_options[long_options_nr - 1].name = tmp;
        }
        long_options_nr++;
}


/*
 * Register several long options. options is a string of long options,
 * separated by commas or whitespace. This nukes options!
 */
static void add_long_options(char *options)
{
        int arg_opt;
        char *tokptr = strtok(options, ", \t\n");
        while (tokptr) {
                arg_opt = no_argument;
                if (strlen(tokptr) > 0) {
                        if (tokptr[strlen(tokptr) - 1] == ':') {
                                if (tokptr[strlen(tokptr) - 2] == ':') {
                                        tokptr[strlen(tokptr) - 2] = '\0';
                                        arg_opt = optional_argument;
                                } else {
                                        tokptr[strlen(tokptr) - 1] = '\0';
                                        arg_opt = required_argument;
                                }
                                if (strlen(tokptr) == 0)
                                        parse_error(_
                                                    ("empty long option after "
                                                     "-l or --long argument"));
                        }
                        add_longopt(tokptr, arg_opt);
                }
                tokptr = strtok(NULL, ", \t\n");
        }
}

static void set_shell(const char *new_shell)
{
        if (!strcmp(new_shell, "bash"))
                shell = BASH;
        else if (!strcmp(new_shell, "tcsh"))
                shell = TCSH;
        else if (!strcmp(new_shell, "sh"))
                shell = BASH;
        else if (!strcmp(new_shell, "csh"))
                shell = TCSH;
        else
                parse_error(_
                            ("unknown shell after -s or --shell argument"));
}

static void __attribute__ ((__noreturn__)) print_help(void)
{
        fputs(USAGE_HEADER, stderr);
        fprintf(stderr, _(
                " %1$s optstring parameters\n"
                " %1$s [options] [--] optstring parameters\n"
                " %1$s [options] -o|--options optstring [options] [--] parameters\n"),
                program_invocation_short_name);

        fputs(USAGE_OPTIONS, stderr);
        fputs(_(" -a, --alternative            Allow long options starting with single -\n"), stderr);
        fputs(_(" -l, --longoptions <longopts> Long options to be recognized\n"), stderr);
        fputs(_(" -n, --name <progname>        The name under which errors are reported\n"), stderr);
        fputs(_(" -o, --options <optstring>    Short options to be recognized\n"), stderr);
        fputs(_(" -q, --quiet                  Disable error reporting by getopt(3)\n"), stderr);
        fputs(_(" -Q, --quiet-output           No normal output\n"), stderr);
        fputs(_(" -s, --shell <shell>          Set shell quoting conventions\n"), stderr);
        fputs(_(" -T, --test                   Test for getopt(1) version\n"), stderr);
        fputs(_(" -u, --unquoted               Do not quote the output\n"), stderr);
        fputs(USAGE_SEPARATOR, stderr);
        fputs(USAGE_HELP, stderr);
        fputs(USAGE_VERSION, stderr);
        fprintf(stderr, USAGE_MAN_TAIL("getopt(1)"));
        exit(PARAMETER_EXIT_CODE);
}

int main(int argc, char *argv[])
{
        char *optstr = NULL;
        char *name = NULL;
        int opt;
        int compatible = 0;

        /* Stop scanning as soon as a non-option argument is found! */
        static const char *shortopts = "+ao:l:n:qQs:TuhV";
        static const struct option longopts[] = {
                {"options", required_argument, NULL, 'o'},
                {"longoptions", required_argument, NULL, 'l'},
                {"quiet", no_argument, NULL, 'q'},
                {"quiet-output", no_argument, NULL, 'Q'},
                {"shell", required_argument, NULL, 's'},
                {"test", no_argument, NULL, 'T'},
                {"unquoted", no_argument, NULL, 'u'},
                {"help", no_argument, NULL, 'h'},
                {"alternative", no_argument, NULL, 'a'},
                {"name", required_argument, NULL, 'n'},
                {"version", no_argument, NULL, 'V'},
                {NULL, 0, NULL, 0}
        };

        setlocale(LC_ALL, "");
        bindtextdomain(PACKAGE, LOCALEDIR);
        textdomain(PACKAGE);

        init_longopt();
        getopt_long_fp = getopt_long;

        if (getenv("GETOPT_COMPATIBLE"))
                compatible = 1;

        if (argc == 1) {
                if (compatible) {
                        /*
                         * For some reason, the original getopt gave no
                         * error when there were no arguments.
                         */
                        printf(" --\n");
                        return EXIT_SUCCESS;
                } else
                        parse_error(_("missing optstring argument"));
        }

        if (argv[1][0] != '-' || compatible) {
                quote = 0;
                optstr = xmalloc(strlen(argv[1]) + 1);
                strcpy(optstr, argv[1] + strspn(argv[1], "-+"));
                argv[1] = argv[0];
                return generate_output(argv + 1, argc - 1, optstr,
                                       long_options);
        }

        while ((opt =
                getopt_long(argc, argv, shortopts, longopts, NULL)) != EOF)
                switch (opt) {
                case 'a':
                        getopt_long_fp = getopt_long_only;
                        break;
                case 'h':
                        print_help();
                case 'o':
                        free(optstr);
                        optstr = xmalloc(strlen(optarg) + 1);
                        strcpy(optstr, optarg);
                        break;
                case 'l':
                        add_long_options(optarg);
                        break;
                case 'n':
                        free(name);
                        name = xmalloc(strlen(optarg) + 1);
                        strcpy(name, optarg);
                        break;
                case 'q':
                        quiet_errors = 1;
                        break;
                case 'Q':
                        quiet_output = 1;
                        break;
                case 's':
                        set_shell(optarg);
                        break;
                case 'T':
                        return TEST_EXIT_CODE;
                case 'u':
                        quote = 0;
                        break;
                case 'V':
                        printf(UTIL_LINUX_VERSION);
                        return EXIT_SUCCESS;
                case '?':
                case ':':
                        parse_error(NULL);
                default:
                        parse_error(_("internal error, contact the author."));
                }

        if (!optstr) {
                if (optind >= argc)
                        parse_error(_("missing optstring argument"));
                else {
                        optstr = xmalloc(strlen(argv[optind]) + 1);
                        strcpy(optstr, argv[optind]);
                        optind++;
                }
        }
        if (name)
                argv[optind - 1] = name;
        else
                argv[optind - 1] = argv[0];

        return generate_output(argv + optind - 1, argc-optind + 1,
                               optstr, long_options);
}
1	frodo	259	/*
2	frodo	317	* getopt.c - Enhanced implementation of BSD getopt(1)
3	frodo	367	* Copyright (c) 1997-2014 Frodo Looijaard <frodo@frodo.looijaard.name>
4	frodo	317	*
5			* This program is free software; you can redistribute it and/or modify
6			* it under the terms of the GNU General Public License as published by
7			* the Free Software Foundation; either version 2 of the License, or
8			* (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15	frodo	364	* You should have received a copy of the GNU General Public License along
16			* with this program; if not, write to the Free Software Foundation, Inc.,
17			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18	frodo	317	*/
19	frodo	259
20	frodo	364	/*
21	frodo	259	* Version 1.0-b4: Tue Sep 23 1997. First public release.
22	frodo	364	* Version 1.0: Wed Nov 19 1997.
23	frodo	259	* Bumped up the version number to 1.0
24			* Fixed minor typo (CSH instead of TCSH)
25			* Version 1.0.1: Tue Jun 3 1998
26			* Fixed sizeof instead of strlen bug
27			* Bumped up the version number to 1.0.1
28			* Version 1.0.2: Thu Jun 11 1998 (not present)
29			* Fixed gcc-2.8.1 warnings
30			* Fixed --version/-V option (not present)
31			* Version 1.0.5: Tue Jun 22 1999
32			* Make -u option work (not present)
33			* Version 1.0.6: Tue Jun 27 2000
34			* No important changes
35			* Version 1.1.0: Tue Jun 30 2000
36	frodo	364	* Added NLS support (partly written by Arkadiusz Miśkiewicz
37	frodo	259	* <misiek@pld.org.pl>)
38	frodo	263	* Version 1.1.4: Mon Nov 7 2005
39			* Fixed a few type's in the manpage
40	frodo	361	* Version 1.1.5: Sun Aug 12 2012
41	frodo	327	* Sync with util-linux-2.21, fixed build problems, many new translations
42	frodo	370	* Version 1.1.6: ??? 2014
43	frodo	374	* Sync with util-linux git 20141120, detect ambiguous long options, fix
44			* backslash problem in tcsh
45	frodo	259	*/
46
47	frodo	318	/* Exit codes:
48	frodo	364	* 0) No errors, successful operation.
49	frodo	318	* 1) getopt(3) returned an error.
50			* 2) A problem with parameter parsing for getopt(1).
51			* 3) Internal error, out of memory
52			* 4) Returned for -T
53			*/
54			#define GETOPT_EXIT_CODE 1
55			#define PARAMETER_EXIT_CODE 2
56			#define XALLOC_EXIT_CODE 3
57			#define TEST_EXIT_CODE 4
58
59	frodo	259	#include <stdio.h>
60			#include <stdlib.h>
61			#include <string.h>
62			#include <unistd.h>
63			#include <ctype.h>
64
65			#if LIBCGETOPT
66			#include <getopt.h>
67			#else
68			#include "getopt.h"
69			#endif
70
71	frodo	363	#include "util-linux-compat.h"
72	frodo	259	#include "nls.h"
73	frodo	322	#include "xalloc.h"
74	frodo	259
75	frodo	364	/* NON_OPT is the code that is returned when a non-option is found in '+'
76	frodo	317	* mode */
77	frodo	259	#define NON_OPT 1
78			/* LONG_OPT is the code that is returned when a long option is found. */
79	frodo	370	#define LONG_OPT 0
80	frodo	259
81			/* The shells recognized. */
82	frodo	320	typedef enum { BASH, TCSH } shell_t;
83	frodo	259
84
85			/* Some global variables that tells us how to parse. */
86	frodo	321	static shell_t shell = BASH; /* The shell we generate output for. */
87			static int quiet_errors = 0; /* 0 is not quiet. */
88			static int quiet_output = 0; /* 0 is not quiet. */
89			static int quote = 1; /* 1 is do quote. */
90	frodo	259
91	frodo	322	/* Allow changing which getopt is in use with function pointer */
92	frodo	319	int (getopt_long_fp) (int argc, char const argv, const char optstr,
93	frodo	320	const struct option * longopts, int *longindex);
94	frodo	319
95	frodo	259	/* Function prototypes */
96	frodo	321	static const char normalize(const char arg);
97			static int generate_output(char argv[], int argc, const char optstr,
98			const struct option *longopts);
99			static void parse_error(const char *message);
100			static void add_long_options(char *options);
101			static void add_longopt(const char *name, int has_arg);
102			static void print_help(void);
103			static void set_shell(const char *new_shell);
104	frodo	259
105			/*
106	frodo	317	* This function 'normalizes' a single argument: it puts single quotes
107			* around it and escapes other special characters. If quote is false, it
108			* just returns its argument.
109			*
110	frodo	259	* Bash only needs special treatment for single quotes; tcsh also recognizes
111	frodo	317	* exclamation marks within single quotes, and nukes whitespace. This
112			* function returns a pointer to a buffer that is overwritten by each call.
113	frodo	259	*/
114	frodo	321	static const char normalize(const char arg)
115	frodo	259	{
116	frodo	320	static char *BUFFER = NULL;
117			const char *argptr = arg;
118	frodo	259	char *bufptr;
119
120	frodo	322	free(BUFFER);
121	frodo	259
122	frodo	320	if (!quote) {
123	frodo	317	/* Just copy arg */
124	frodo	322	BUFFER = xmalloc(strlen(arg) + 1);
125	frodo	320	strcpy(BUFFER, arg);
126	frodo	259	return BUFFER;
127			}
128
129	frodo	317	/*
130	frodo	364	* Each character in arg may take up to four characters in the
131	frodo	317	* result: For a quote we need a closing quote, a backslash, a quote
132			* and an opening quote! We need also the global opening and closing
133			* quote, and one extra character for '\0'.
134			*/
135	frodo	322	BUFFER = xmalloc(strlen(arg) * 4 + 3);
136	frodo	259
137	frodo	320	bufptr = BUFFER;
138			*bufptr++ = '\'';
139	frodo	259
140			while (*argptr) {
141			if (*argptr == '\'') {
142			/* Quote: replace it with: '\'' */
143	frodo	320	*bufptr++ = '\'';
144			*bufptr++ = '\\';
145			*bufptr++ = '\'';
146			*bufptr++ = '\'';
147	frodo	374	} else if (shell == TCSH && *argptr == '\\') {
148			/* Backslash: replace it with: '\\' */
149			*bufptr++ = '\\';
150			*bufptr++ = '\\';
151	frodo	320	} else if (shell == TCSH && *argptr == '!') {
152	frodo	259	/* Exclamation mark: replace it with: \! */
153	frodo	320	*bufptr++ = '\'';
154			*bufptr++ = '\\';
155			*bufptr++ = '!';
156			*bufptr++ = '\'';
157			} else if (shell == TCSH && *argptr == '\n') {
158	frodo	259	/* Newline: replace it with: \n */
159	frodo	320	*bufptr++ = '\\';
160			*bufptr++ = 'n';
161			} else if (shell == TCSH && isspace(*argptr)) {
162	frodo	259	/* Non-newline whitespace: replace it with \<ws> */
163	frodo	320	*bufptr++ = '\'';
164			*bufptr++ = '\\';
165			bufptr++ = argptr;
166			*bufptr++ = '\'';
167	frodo	259	} else
168			/* Just copy */
169	frodo	320	bufptr++ = argptr;
170	frodo	259	argptr++;
171			}
172	frodo	320	*bufptr++ = '\'';
173			*bufptr++ = '\0';
174	frodo	259	return BUFFER;
175			}
176
177	frodo	364	/*
178	frodo	259	* Generate the output. argv[0] is the program name (used for reporting errors).
179			* argv[1..] contains the options to be parsed. argc must be the number of
180			* elements in argv (ie. 1 if there are no options, only the program name),
181			* optstr must contain the short options, and longopts the long options.
182			* Other settings are found in global variables.
183			*/
184	frodo	321	static int generate_output(char argv[], int argc, const char optstr,
185			const struct option *longopts)
186	frodo	259	{
187	frodo	318	int exit_code = EXIT_SUCCESS; /* Assume everything will be OK */
188	frodo	259	int opt;
189			int longindex;
190			const char *charptr;
191
192	frodo	320	if (quiet_errors)
193	frodo	317	/* No error reporting from getopt(3) */
194	frodo	320	opterr = 0;
195	frodo	317	/* Reset getopt(3) */
196	frodo	320	optind = 0;
197	frodo	259
198	frodo	320	while ((opt =
199	frodo	319	(getopt_long_fp(argc, argv, optstr, longopts, &longindex)))
200	frodo	320	!= EOF)
201			if (opt == '?' \|\| opt == ':')
202	frodo	318	exit_code = GETOPT_EXIT_CODE;
203	frodo	320	else if (!quiet_output) {
204	frodo	259	if (opt == LONG_OPT) {
205	frodo	320	printf(" --%s", longopts[longindex].name);
206			if (longopts[longindex].has_arg)
207			printf(" %s", normalize(optarg ? optarg : ""));
208			} else if (opt == NON_OPT)
209	frodo	359	printf(" %s", normalize(optarg ? optarg : ""));
210	frodo	259	else {
211	frodo	320	printf(" -%c", opt);
212			charptr = strchr(optstr, opt);
213	frodo	259	if (charptr != NULL && *++charptr == ':')
214	frodo	320	printf(" %s", normalize(optarg ? optarg : ""));
215	frodo	259	}
216			}
217	frodo	320
218			if (!quiet_output) {
219	frodo	259	printf(" --");
220	frodo	320	while (optind < argc)
221			printf(" %s", normalize(argv[optind++]));
222	frodo	259	printf("\n");
223			}
224			return exit_code;
225			}
226
227			/*
228	frodo	317	* Report an error when parsing getopt's own arguments. If message is NULL,
229			* we already sent a message, we just exit with a helpful hint.
230	frodo	259	*/
231	frodo	321	static void __attribute__ ((__noreturn__)) parse_error(const char *message)
232	frodo	259	{
233			if (message)
234	frodo	364	warnx("%s", message);
235	frodo	323	fprintf(stderr, _("Try `%s --help' for more information.\n"),
236			program_invocation_short_name);
237	frodo	318	exit(PARAMETER_EXIT_CODE);
238	frodo	259	}
239
240	frodo	320	static struct option *long_options = NULL;
241			static int long_options_length = 0; /* Length of array */
242			static int long_options_nr = 0; /* Nr of used elements in array */
243	frodo	259	#define LONG_OPTIONS_INCR 10
244			#define init_longopt() add_longopt(NULL,0)
245
246			/* Register a long option. The contents of name is copied. */
247	frodo	321	static void add_longopt(const char *name, int has_arg)
248	frodo	259	{
249			char *tmp;
250	frodo	370	static int flag;
251
252	frodo	320	if (!name) {
253	frodo	317	/* init */
254	frodo	259	free(long_options);
255	frodo	320	long_options = NULL;
256			long_options_length = 0;
257			long_options_nr = 0;
258	frodo	259	}
259
260			if (long_options_nr == long_options_length) {
261			long_options_length += LONG_OPTIONS_INCR;
262	frodo	322	long_options = xrealloc(long_options,
263			sizeof(struct option) *
264			long_options_length);
265	frodo	259	}
266
267	frodo	320	long_options[long_options_nr].name = NULL;
268			long_options[long_options_nr].has_arg = 0;
269			long_options[long_options_nr].flag = NULL;
270			long_options[long_options_nr].val = 0;
271	frodo	259
272	frodo	359	if (long_options_nr && name) {
273	frodo	317	/* Not for init! */
274	frodo	320	long_options[long_options_nr - 1].has_arg = has_arg;
275	frodo	370	long_options[long_options_nr - 1].flag = &flag;
276			long_options[long_options_nr - 1].val = long_options_nr;
277	frodo	322	tmp = xmalloc(strlen(name) + 1);
278	frodo	320	strcpy(tmp, name);
279			long_options[long_options_nr - 1].name = tmp;
280	frodo	259	}
281			long_options_nr++;
282			}
283
284	frodo	320
285	frodo	364	/*
286	frodo	317	* Register several long options. options is a string of long options,
287			* separated by commas or whitespace. This nukes options!
288	frodo	259	*/
289	frodo	321	static void add_long_options(char *options)
290	frodo	259	{
291			int arg_opt;
292	frodo	320	char *tokptr = strtok(options, ", \t\n");
293	frodo	259	while (tokptr) {
294	frodo	320	arg_opt = no_argument;
295	frodo	259	if (strlen(tokptr) > 0) {
296	frodo	320	if (tokptr[strlen(tokptr) - 1] == ':') {
297			if (tokptr[strlen(tokptr) - 2] == ':') {
298			tokptr[strlen(tokptr) - 2] = '\0';
299			arg_opt = optional_argument;
300	frodo	259	} else {
301	frodo	320	tokptr[strlen(tokptr) - 1] = '\0';
302			arg_opt = required_argument;
303	frodo	259	}
304			if (strlen(tokptr) == 0)
305	frodo	320	parse_error(_
306			("empty long option after "
307			"-l or --long argument"));
308	frodo	259	}
309	frodo	320	add_longopt(tokptr, arg_opt);
310	frodo	259	}
311	frodo	320	tokptr = strtok(NULL, ", \t\n");
312	frodo	259	}
313			}
314
315	frodo	321	static void set_shell(const char *new_shell)
316	frodo	259	{
317	frodo	320	if (!strcmp(new_shell, "bash"))
318			shell = BASH;
319			else if (!strcmp(new_shell, "tcsh"))
320			shell = TCSH;
321			else if (!strcmp(new_shell, "sh"))
322			shell = BASH;
323			else if (!strcmp(new_shell, "csh"))
324			shell = TCSH;
325	frodo	259	else
326	frodo	320	parse_error(_
327			("unknown shell after -s or --shell argument"));
328	frodo	259	}
329
330	frodo	321	static void __attribute__ ((__noreturn__)) print_help(void)
331	frodo	259	{
332	frodo	363	fputs(USAGE_HEADER, stderr);
333			fprintf(stderr, _(
334			" %1$s optstring parameters\n"
335			" %1$s [options] [--] optstring parameters\n"
336			" %1$s [options] -o\|--options optstring [options] [--] parameters\n"),
337			program_invocation_short_name);
338
339			fputs(USAGE_OPTIONS, stderr);
340	frodo	320	fputs(_(" -a, --alternative Allow long options starting with single -\n"), stderr);
341	frodo	323	fputs(_(" -l, --longoptions <longopts> Long options to be recognized\n"), stderr);
342			fputs(_(" -n, --name <progname> The name under which errors are reported\n"), stderr);
343			fputs(_(" -o, --options <optstring> Short options to be recognized\n"), stderr);
344	frodo	320	fputs(_(" -q, --quiet Disable error reporting by getopt(3)\n"), stderr);
345			fputs(_(" -Q, --quiet-output No normal output\n"), stderr);
346	frodo	323	fputs(_(" -s, --shell <shell> Set shell quoting conventions\n"), stderr);
347	frodo	320	fputs(_(" -T, --test Test for getopt(1) version\n"), stderr);
348	frodo	362	fputs(_(" -u, --unquoted Do not quote the output\n"), stderr);
349	frodo	363	fputs(USAGE_SEPARATOR, stderr);
350			fputs(USAGE_HELP, stderr);
351			fputs(USAGE_VERSION, stderr);
352			fprintf(stderr, USAGE_MAN_TAIL("getopt(1)"));
353	frodo	318	exit(PARAMETER_EXIT_CODE);
354	frodo	259	}
355
356	frodo	321	int main(int argc, char *argv[])
357			{
358			char *optstr = NULL;
359			char *name = NULL;
360			int opt;
361			int compatible = 0;
362
363			/* Stop scanning as soon as a non-option argument is found! */
364			static const char *shortopts = "+ao:l:n:qQs:TuhV";
365			static const struct option longopts[] = {
366	frodo	320	{"options", required_argument, NULL, 'o'},
367			{"longoptions", required_argument, NULL, 'l'},
368			{"quiet", no_argument, NULL, 'q'},
369			{"quiet-output", no_argument, NULL, 'Q'},
370			{"shell", required_argument, NULL, 's'},
371			{"test", no_argument, NULL, 'T'},
372			{"unquoted", no_argument, NULL, 'u'},
373			{"help", no_argument, NULL, 'h'},
374			{"alternative", no_argument, NULL, 'a'},
375			{"name", required_argument, NULL, 'n'},
376			{"version", no_argument, NULL, 'V'},
377			{NULL, 0, NULL, 0}
378			};
379	frodo	364
380	frodo	320	setlocale(LC_ALL, "");
381	frodo	259	bindtextdomain(PACKAGE, LOCALEDIR);
382			textdomain(PACKAGE);
383
384			init_longopt();
385	frodo	319	getopt_long_fp = getopt_long;
386	frodo	259
387	frodo	320	if (getenv("GETOPT_COMPATIBLE"))
388			compatible = 1;
389	frodo	259
390	frodo	320	if (argc == 1) {
391	frodo	259	if (compatible) {
392	frodo	320	/*
393			* For some reason, the original getopt gave no
394			* error when there were no arguments.
395	frodo	317	*/
396	frodo	259	printf(" --\n");
397	frodo	318	return EXIT_SUCCESS;
398	frodo	320	} else
399	frodo	259	parse_error(_("missing optstring argument"));
400	frodo	319	}
401	frodo	320
402	frodo	259	if (argv[1][0] != '-' \|\| compatible) {
403	frodo	320	quote = 0;
404	frodo	322	optstr = xmalloc(strlen(argv[1]) + 1);
405	frodo	320	strcpy(optstr, argv[1] + strspn(argv[1], "-+"));
406			argv[1] = argv[0];
407			return generate_output(argv + 1, argc - 1, optstr,
408			long_options);
409	frodo	259	}
410	frodo	320
411			while ((opt =
412			getopt_long(argc, argv, shortopts, longopts, NULL)) != EOF)
413	frodo	259	switch (opt) {
414			case 'a':
415	frodo	319	getopt_long_fp = getopt_long_only;
416	frodo	259	break;
417			case 'h':
418			print_help();
419			case 'o':
420	frodo	322	free(optstr);
421			optstr = xmalloc(strlen(optarg) + 1);
422	frodo	320	strcpy(optstr, optarg);
423	frodo	259	break;
424			case 'l':
425			add_long_options(optarg);
426			break;
427			case 'n':
428	frodo	322	free(name);
429			name = xmalloc(strlen(optarg) + 1);
430	frodo	320	strcpy(name, optarg);
431	frodo	259	break;
432			case 'q':
433	frodo	320	quiet_errors = 1;
434	frodo	259	break;
435			case 'Q':
436	frodo	320	quiet_output = 1;
437	frodo	259	break;
438			case 's':
439			set_shell(optarg);
440			break;
441			case 'T':
442	frodo	318	return TEST_EXIT_CODE;
443	frodo	259	case 'u':
444	frodo	320	quote = 0;
445	frodo	259	break;
446			case 'V':
447	frodo	363	printf(UTIL_LINUX_VERSION);
448	frodo	318	return EXIT_SUCCESS;
449	frodo	259	case '?':
450			case ':':
451			parse_error(NULL);
452			default:
453			parse_error(_("internal error, contact the author."));
454			}
455	frodo	364
456	frodo	320	if (!optstr) {
457	frodo	259	if (optind >= argc)
458			parse_error(_("missing optstring argument"));
459			else {
460	frodo	322	optstr = xmalloc(strlen(argv[optind]) + 1);
461	frodo	320	strcpy(optstr, argv[optind]);
462	frodo	259	optind++;
463			}
464			}
465			if (name)
466	frodo	320	argv[optind - 1] = name;
467	frodo	259	else
468	frodo	320	argv[optind - 1] = argv[0];
469	frodo	364
470	frodo	320	return generate_output(argv + optind - 1, argc-optind + 1,
471			optstr, long_options);
472	frodo	259	}
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