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
 */

/* 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 2

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