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 ambigious long options
 */

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