busybox/util-linux/getopt.c

/* vi: set sw=4 ts=4: */
/*
 * getopt.c - Enhanced implementation of BSD getopt(1)
 *   Copyright (c) 1997, 1998, 1999, 2000  Frodo Looijaard <frodol@dds.nl>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/*
 * 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 Mickiewicz
 *     <misiek@misiek.eu.org>)
 * Ported to Busybox - Alfred M. Szmidt <ams@trillian.itslinux.org>
 *  Removed --version/-V and --help/-h in
 *  Removed parse_error(), using bb_error_msg() from Busybox instead
 *  Replaced our_malloc with xmalloc and our_realloc with xrealloc
 *
 */

#include <getopt.h>
#include "libbb.h"

/* NON_OPT is the code that is returned when a non-option is found in '+'
   mode */
enum {
	NON_OPT = 1,
#if ENABLE_FEATURE_GETOPT_LONG
/* LONG_OPT is the code that is returned when a long option is found. */
	LONG_OPT = 2
#endif
};

/* For finding activated option flags. Must match getopt32 call! */
enum {
	OPT_o	= 0x1,	// -o
	OPT_n	= 0x2,	// -n
	OPT_q	= 0x4,	// -q
	OPT_Q	= 0x8,	// -Q
	OPT_s	= 0x10,	// -s
	OPT_T	= 0x20,	// -T
	OPT_u	= 0x40,	// -u
#if ENABLE_FEATURE_GETOPT_LONG
	OPT_a	= 0x80,	// -a
	OPT_l	= 0x100, // -l
#endif
	SHELL_IS_TCSH = 0x8000, /* hijack this bit for other purposes */
};

/* 0 is getopt_long, 1 is getopt_long_only */
#define alternative  (option_mask32 & OPT_a)

#define quiet_errors (option_mask32 & OPT_q)
#define quiet_output (option_mask32 & OPT_Q)
#define quote        (!(option_mask32 & OPT_u))
#define shell_TCSH   (option_mask32 & SHELL_IS_TCSH)

/*
 * 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)
{
	char *bufptr;
#if ENABLE_FEATURE_CLEAN_UP
	static char *BUFFER = NULL;
	free(BUFFER);
#else
	char *BUFFER;
#endif

	if (!quote) { /* Just copy arg */
		BUFFER = xstrdup(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 (*arg) {
		if (*arg == '\'') {
			/* Quote: replace it with: '\'' */
			*bufptr ++= '\'';
			*bufptr ++= '\\';
			*bufptr ++= '\'';
			*bufptr ++= '\'';
		} else if (shell_TCSH && *arg == '!') {
			/* Exclamation mark: replace it with: \! */
			*bufptr ++= '\'';
			*bufptr ++= '\\';
			*bufptr ++= '!';
			*bufptr ++= '\'';
		} else if (shell_TCSH && *arg == '\n') {
			/* Newline: replace it with: \n */
			*bufptr ++= '\\';
			*bufptr ++= 'n';
		} else if (shell_TCSH && isspace(*arg)) {
			/* Non-newline whitespace: replace it with \<ws> */
			*bufptr ++= '\'';
			*bufptr ++= '\\';
			*bufptr ++= *arg;
			*bufptr ++= '\'';
		} else
			/* Just copy */
			*bufptr ++= *arg;
		arg++;
	}
	*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.
 */
#if !ENABLE_FEATURE_GETOPT_LONG
#define generate_output(argv,argc,optstr,longopts) \
	generate_output(argv,argc,optstr)
#endif
static int generate_output(char **argv, int argc, const char *optstr, const struct option *longopts)
{
	int exit_code = 0; /* We assume everything will be OK */
	int opt;
#if ENABLE_FEATURE_GETOPT_LONG
	int longindex;
#endif
	const char *charptr;

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

	/* We used it already in main() in getopt32(),
	 * we *must* reset getopt(3): */
#ifdef __GLIBC__
	optind = 0;
#else /* BSD style */
	optind = 1;
	/* optreset = 1; */
#endif

	while (1) {
		opt =
#if ENABLE_FEATURE_GETOPT_LONG
			alternative ?
			getopt_long_only(argc, argv, optstr, longopts, &longindex) :
			getopt_long(argc, argv, optstr, longopts, &longindex);
#else
			getopt(argc, argv, optstr);
#endif
		if (opt == -1)
			break;
		if (opt == '?' || opt == ':' )
			exit_code = 1;
		else if (!quiet_output) {
#if ENABLE_FEATURE_GETOPT_LONG
			if (opt == LONG_OPT) {
				printf(" --%s", longopts[longindex].name);
				if (longopts[longindex].has_arg)
					printf(" %s",
						normalize(optarg ? optarg : ""));
			} else
#endif
			if (opt == NON_OPT)
				printf(" %s", normalize(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++]));
		bb_putchar('\n');
	}
	return exit_code;
}

#if ENABLE_FEATURE_GETOPT_LONG
/*
 * Register several long options. options is a string of long options,
 * separated by commas or whitespace.
 * This nukes options!
 */
static struct option *add_long_options(struct option *long_options, char *options)
{
	int long_nr = 0;
	int arg_opt, tlen;
	char *tokptr = strtok(options, ", \t\n");

	if (long_options)
		while (long_options[long_nr].name)
			long_nr++;

	while (tokptr) {
		arg_opt = no_argument;
		tlen = strlen(tokptr);
		if (tlen) {
			tlen--;
			if (tokptr[tlen] == ':') {
				arg_opt = required_argument;
				if (tlen && tokptr[tlen-1] == ':') {
					tlen--;
					arg_opt = optional_argument;
				}
				tokptr[tlen] = '\0';
				if (tlen == 0)
					bb_error_msg_and_die("empty long option specified");
			}
			long_options = xrealloc_vector(long_options, 4, long_nr);
			long_options[long_nr].has_arg = arg_opt;
			/*long_options[long_nr].flag = NULL; - xrealloc_vector did it */
			long_options[long_nr].val = LONG_OPT;
			long_options[long_nr].name = xstrdup(tokptr);
			long_nr++;
			/*memset(&long_options[long_nr], 0, sizeof(long_options[0])); - xrealloc_vector did it */
		}
		tokptr = strtok(NULL, ", \t\n");
	}
	return long_options;
}
#endif

static void set_shell(const char *new_shell)
{
	if (!strcmp(new_shell, "bash") || !strcmp(new_shell, "sh"))
		return;
	if (!strcmp(new_shell, "tcsh") || !strcmp(new_shell, "csh"))
		option_mask32 |= SHELL_IS_TCSH;
	else
		bb_error_msg("unknown shell '%s', assuming bash", new_shell);
}


/* 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
 */

#if ENABLE_FEATURE_GETOPT_LONG
static const char getopt_longopts[] ALIGN1 =
	"options\0"      Required_argument "o"
	"longoptions\0"  Required_argument "l"
	"quiet\0"        No_argument       "q"
	"quiet-output\0" No_argument       "Q"
	"shell\0"        Required_argument "s"
	"test\0"         No_argument       "T"
	"unquoted\0"     No_argument       "u"
	"alternative\0"  No_argument       "a"
	"name\0"         Required_argument "n"
	;
#endif

int getopt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int getopt_main(int argc, char **argv)
{
	char *optstr = NULL;
	char *name = NULL;
	unsigned opt;
	const char *compatible;
	char *s_arg;
#if ENABLE_FEATURE_GETOPT_LONG
	struct option *long_options = NULL;
	llist_t *l_arg = NULL;
#endif

	compatible = getenv("GETOPT_COMPATIBLE"); /* used as yes/no flag */

	if (argc == 1) {
		if (compatible) {
			/* For some reason, the original getopt gave no error
			   when there were no arguments. */
			printf(" --\n");
			return 0;
		}
		bb_error_msg_and_die("missing optstring argument");
	}

	if (argv[1][0] != '-' || compatible) {
		char *s;

		option_mask32 |= OPT_u; /* quoting off */
		s = xstrdup(argv[1] + strspn(argv[1], "-+"));
		argv[1] = argv[0];
		return generate_output(argv+1, argc-1, s, long_options);
	}

#if !ENABLE_FEATURE_GETOPT_LONG
	opt = getopt32(argv, "+o:n:qQs:Tu", &optstr, &name, &s_arg);
#else
	applet_long_options = getopt_longopts;
	opt_complementary = "l::";
	opt = getopt32(argv, "+o:n:qQs:Tual:",
					&optstr, &name, &s_arg, &l_arg);
	/* Effectuate the read options for the applet itself */
	while (l_arg) {
		long_options = add_long_options(long_options, llist_pop(&l_arg));
	}
#endif

	if (opt & OPT_s) {
		set_shell(s_arg);
	}

	if (opt & OPT_T) {
		return 4;
	}

	/* All options controlling the applet have now been parsed */
	if (!optstr) {
		if (optind >= argc)
			bb_error_msg_and_die("missing optstring argument");
		optstr = argv[optind++];
	}

	argv[optind-1] = name ? name : argv[0];
	return generate_output(argv+optind-1, argc-optind+1, optstr, long_options);
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* getopt.c - Enhanced implementation of BSD getopt(1)
4			* Copyright (c) 1997, 1998, 1999, 2000 Frodo Looijaard <frodol@dds.nl>
5			*
6			* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7			*/
8
9			/*
10			* Version 1.0-b4: Tue Sep 23 1997. First public release.
11			* Version 1.0: Wed Nov 19 1997.
12			* Bumped up the version number to 1.0
13			* Fixed minor typo (CSH instead of TCSH)
14			* Version 1.0.1: Tue Jun 3 1998
15			* Fixed sizeof instead of strlen bug
16			* Bumped up the version number to 1.0.1
17			* Version 1.0.2: Thu Jun 11 1998 (not present)
18			* Fixed gcc-2.8.1 warnings
19			* Fixed --version/-V option (not present)
20			* Version 1.0.5: Tue Jun 22 1999
21			* Make -u option work (not present)
22			* Version 1.0.6: Tue Jun 27 2000
23			* No important changes
24			* Version 1.1.0: Tue Jun 30 2000
25	niro	816	* Added NLS support (partly written by Arkadiusz Mickiewicz
26	niro	532	* <misiek@misiek.eu.org>)
27			* Ported to Busybox - Alfred M. Szmidt <ams@trillian.itslinux.org>
28			* Removed --version/-V and --help/-h in
29			* Removed parse_error(), using bb_error_msg() from Busybox instead
30			* Replaced our_malloc with xmalloc and our_realloc with xrealloc
31			*
32			*/
33
34			#include <getopt.h>
35	niro	816	#include "libbb.h"
36	niro	532
37			/* NON_OPT is the code that is returned when a non-option is found in '+'
38			mode */
39			enum {
40			NON_OPT = 1,
41	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
42	niro	532	/* LONG_OPT is the code that is returned when a long option is found. */
43			LONG_OPT = 2
44	niro	816	#endif
45	niro	532	};
46
47	niro	816	/* For finding activated option flags. Must match getopt32 call! */
48			enum {
49			OPT_o = 0x1, // -o
50			OPT_n = 0x2, // -n
51			OPT_q = 0x4, // -q
52			OPT_Q = 0x8, // -Q
53			OPT_s = 0x10, // -s
54			OPT_T = 0x20, // -T
55			OPT_u = 0x40, // -u
56	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
57	niro	816	OPT_a = 0x80, // -a
58			OPT_l = 0x100, // -l
59			#endif
60			SHELL_IS_TCSH = 0x8000, /* hijack this bit for other purposes */
61			};
62	niro	532
63	niro	816	/* 0 is getopt_long, 1 is getopt_long_only */
64			#define alternative (option_mask32 & OPT_a)
65	niro	532
66	niro	816	#define quiet_errors (option_mask32 & OPT_q)
67			#define quiet_output (option_mask32 & OPT_Q)
68			#define quote (!(option_mask32 & OPT_u))
69			#define shell_TCSH (option_mask32 & SHELL_IS_TCSH)
70	niro	532
71			/*
72			* This function 'normalizes' a single argument: it puts single quotes around
73			* it and escapes other special characters. If quote is false, it just
74			* returns its argument.
75			* Bash only needs special treatment for single quotes; tcsh also recognizes
76			* exclamation marks within single quotes, and nukes whitespace.
77			* This function returns a pointer to a buffer that is overwritten by
78			* each call.
79			*/
80	niro	816	static const char normalize(const char arg)
81	niro	532	{
82			char *bufptr;
83	niro	816	#if ENABLE_FEATURE_CLEAN_UP
84			static char *BUFFER = NULL;
85	niro	532	free(BUFFER);
86	niro	816	#else
87			char *BUFFER;
88			#endif
89	niro	532
90			if (!quote) { /* Just copy arg */
91	niro	816	BUFFER = xstrdup(arg);
92	niro	532	return BUFFER;
93			}
94
95			/* Each character in arg may take up to four characters in the result:
96			For a quote we need a closing quote, a backslash, a quote and an
97			opening quote! We need also the global opening and closing quote,
98			and one extra character for '\0'. */
99	niro	816	BUFFER = xmalloc(strlen(arg)*4 + 3);
100	niro	532
101	niro	816	bufptr = BUFFER;
102			*bufptr ++= '\'';
103	niro	532
104	niro	816	while (*arg) {
105			if (*arg == '\'') {
106	niro	532	/* Quote: replace it with: '\'' */
107	niro	816	*bufptr ++= '\'';
108			*bufptr ++= '\\';
109			*bufptr ++= '\'';
110			*bufptr ++= '\'';
111			} else if (shell_TCSH && *arg == '!') {
112	niro	532	/* Exclamation mark: replace it with: \! */
113	niro	816	*bufptr ++= '\'';
114			*bufptr ++= '\\';
115			*bufptr ++= '!';
116			*bufptr ++= '\'';
117			} else if (shell_TCSH && *arg == '\n') {
118	niro	532	/* Newline: replace it with: \n */
119	niro	816	*bufptr ++= '\\';
120			*bufptr ++= 'n';
121			} else if (shell_TCSH && isspace(*arg)) {
122	niro	532	/* Non-newline whitespace: replace it with \<ws> */
123	niro	816	*bufptr ++= '\'';
124			*bufptr ++= '\\';
125			bufptr ++= arg;
126			*bufptr ++= '\'';
127	niro	532	} else
128			/* Just copy */
129	niro	816	bufptr ++= arg;
130			arg++;
131	niro	532	}
132	niro	816	*bufptr ++= '\'';
133			*bufptr ++= '\0';
134	niro	532	return BUFFER;
135			}
136
137			/*
138			* Generate the output. argv[0] is the program name (used for reporting errors).
139			* argv[1..] contains the options to be parsed. argc must be the number of
140			* elements in argv (ie. 1 if there are no options, only the program name),
141			* optstr must contain the short options, and longopts the long options.
142			* Other settings are found in global variables.
143			*/
144	niro	984	#if !ENABLE_FEATURE_GETOPT_LONG
145	niro	816	#define generate_output(argv,argc,optstr,longopts) \
146			generate_output(argv,argc,optstr)
147			#endif
148			static int generate_output(char *argv, int argc, const char optstr, const struct option *longopts)
149	niro	532	{
150			int exit_code = 0; /* We assume everything will be OK */
151			int opt;
152	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
153	niro	532	int longindex;
154	niro	816	#endif
155	niro	532	const char *charptr;
156
157			if (quiet_errors) /* No error reporting from getopt(3) */
158	niro	816	opterr = 0;
159	niro	532
160	niro	816	/* We used it already in main() in getopt32(),
161			* we must reset getopt(3): */
162			#ifdef __GLIBC__
163			optind = 0;
164			#else /* BSD style */
165			optind = 1;
166			/* optreset = 1; */
167			#endif
168
169			while (1) {
170			opt =
171	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
172	niro	816	alternative ?
173			getopt_long_only(argc, argv, optstr, longopts, &longindex) :
174			getopt_long(argc, argv, optstr, longopts, &longindex);
175			#else
176			getopt(argc, argv, optstr);
177			#endif
178			if (opt == -1)
179			break;
180	niro	532	if (opt == '?' \|\| opt == ':' )
181			exit_code = 1;
182			else if (!quiet_output) {
183	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
184	niro	532	if (opt == LONG_OPT) {
185	niro	816	printf(" --%s", longopts[longindex].name);
186	niro	532	if (longopts[longindex].has_arg)
187			printf(" %s",
188	niro	816	normalize(optarg ? optarg : ""));
189			} else
190			#endif
191			if (opt == NON_OPT)
192			printf(" %s", normalize(optarg));
193	niro	532	else {
194	niro	816	printf(" -%c", opt);
195			charptr = strchr(optstr, opt);
196	niro	532	if (charptr != NULL && *++charptr == ':')
197			printf(" %s",
198	niro	816	normalize(optarg ? optarg : ""));
199	niro	532	}
200			}
201	niro	816	}
202	niro	532
203	niro	816	if (!quiet_output) {
204	niro	532	printf(" --");
205			while (optind < argc)
206	niro	816	printf(" %s", normalize(argv[optind++]));
207			bb_putchar('\n');
208	niro	532	}
209			return exit_code;
210			}
211
212	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
213	niro	532	/*
214			* Register several long options. options is a string of long options,
215			* separated by commas or whitespace.
216			* This nukes options!
217			*/
218	niro	816	static struct option add_long_options(struct option long_options, char *options)
219	niro	532	{
220	niro	816	int long_nr = 0;
221	niro	532	int arg_opt, tlen;
222	niro	816	char *tokptr = strtok(options, ", \t\n");
223
224			if (long_options)
225			while (long_options[long_nr].name)
226			long_nr++;
227
228	niro	532	while (tokptr) {
229	niro	816	arg_opt = no_argument;
230			tlen = strlen(tokptr);
231			if (tlen) {
232			tlen--;
233			if (tokptr[tlen] == ':') {
234			arg_opt = required_argument;
235			if (tlen && tokptr[tlen-1] == ':') {
236			tlen--;
237			arg_opt = optional_argument;
238	niro	532	}
239	niro	816	tokptr[tlen] = '\0';
240	niro	532	if (tlen == 0)
241	niro	816	bb_error_msg_and_die("empty long option specified");
242	niro	532	}
243	niro	816	long_options = xrealloc_vector(long_options, 4, long_nr);
244			long_options[long_nr].has_arg = arg_opt;
245			/long_options[long_nr].flag = NULL; - xrealloc_vector did it /
246			long_options[long_nr].val = LONG_OPT;
247			long_options[long_nr].name = xstrdup(tokptr);
248			long_nr++;
249			/memset(&long_options[long_nr], 0, sizeof(long_options[0])); - xrealloc_vector did it /
250	niro	532	}
251	niro	816	tokptr = strtok(NULL, ", \t\n");
252	niro	532	}
253	niro	816	return long_options;
254	niro	532	}
255	niro	816	#endif
256	niro	532
257	niro	816	static void set_shell(const char *new_shell)
258	niro	532	{
259	niro	816	if (!strcmp(new_shell, "bash") \|\| !strcmp(new_shell, "sh"))
260			return;
261			if (!strcmp(new_shell, "tcsh") \|\| !strcmp(new_shell, "csh"))
262			option_mask32 \|= SHELL_IS_TCSH;
263	niro	532	else
264	niro	816	bb_error_msg("unknown shell '%s', assuming bash", new_shell);
265	niro	532	}
266
267
268			/* Exit codes:
269			* 0) No errors, successful operation.
270			* 1) getopt(3) returned an error.
271			* 2) A problem with parameter parsing for getopt(1).
272			* 3) Internal error, out of memory
273			* 4) Returned for -T
274			*/
275
276	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
277	niro	816	static const char getopt_longopts[] ALIGN1 =
278			"options\0" Required_argument "o"
279			"longoptions\0" Required_argument "l"
280			"quiet\0" No_argument "q"
281			"quiet-output\0" No_argument "Q"
282			"shell\0" Required_argument "s"
283			"test\0" No_argument "T"
284			"unquoted\0" No_argument "u"
285			"alternative\0" No_argument "a"
286			"name\0" Required_argument "n"
287			;
288			#endif
289	niro	532
290	niro	816	int getopt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
291			int getopt_main(int argc, char **argv)
292	niro	532	{
293	niro	816	char *optstr = NULL;
294	niro	532	char *name = NULL;
295	niro	816	unsigned opt;
296			const char *compatible;
297			char *s_arg;
298	niro	984	#if ENABLE_FEATURE_GETOPT_LONG
299	niro	816	struct option *long_options = NULL;
300			llist_t *l_arg = NULL;
301			#endif
302	niro	532
303	niro	816	compatible = getenv("GETOPT_COMPATIBLE"); /* used as yes/no flag */
304	niro	532
305			if (argc == 1) {
306			if (compatible) {
307			/* For some reason, the original getopt gave no error
308			when there were no arguments. */
309			printf(" --\n");
310			return 0;
311	niro	816	}
312			bb_error_msg_and_die("missing optstring argument");
313	niro	532	}
314
315			if (argv[1][0] != '-' \|\| compatible) {
316			char *s;
317
318	niro	816	option_mask32 \|= OPT_u; /* quoting off */
319			s = xstrdup(argv[1] + strspn(argv[1], "-+"));
320			argv[1] = argv[0];
321			return generate_output(argv+1, argc-1, s, long_options);
322	niro	532	}
323
324	niro	984	#if !ENABLE_FEATURE_GETOPT_LONG
325	niro	816	opt = getopt32(argv, "+o:n:qQs:Tu", &optstr, &name, &s_arg);
326			#else
327			applet_long_options = getopt_longopts;
328			opt_complementary = "l::";
329			opt = getopt32(argv, "+o:n:qQs:Tual:",
330			&optstr, &name, &s_arg, &l_arg);
331			/* Effectuate the read options for the applet itself */
332			while (l_arg) {
333			long_options = add_long_options(long_options, llist_pop(&l_arg));
334			}
335			#endif
336	niro	532
337	niro	816	if (opt & OPT_s) {
338			set_shell(s_arg);
339			}
340
341			if (opt & OPT_T) {
342			return 4;
343			}
344
345			/* All options controlling the applet have now been parsed */
346	niro	532	if (!optstr) {
347			if (optind >= argc)
348			bb_error_msg_and_die("missing optstring argument");
349	niro	816	optstr = argv[optind++];
350	niro	532	}
351	niro	816
352			argv[optind-1] = name ? name : argv[0];
353			return generate_output(argv+optind-1, argc-optind+1, optstr, long_options);
354	niro	532	}