mkinitrd-6_2_0/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 Mi<B6>kiewicz
 *     <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 "busybox.h"
#include <getopt.h>

/* NON_OPT is the code that is returned when a non-option is found in '+'
   mode */
enum {
	NON_OPT = 1,
/* LONG_OPT is the code that is returned when a long option is found. */
	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 is not quiet. */
static int quiet_output; /* 0 is not quiet. */
static int quote=1; /* 1 is do quote. */
static int alternative; /* 0 is getopt_long, 1 is getopt_long_only */

/* 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 add_long_options(char *options);
static void add_longopt(const char *name,int has_arg);
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.
 */
const char *normalize(const char *arg)
{
	static char *BUFFER=NULL;
	const char *argptr=arg;
	char *bufptr;

	free(BUFFER);

	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 (*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.
 */
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;
	int longindex;
	const char *charptr;

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

	while ((opt = (alternative?
			getopt_long_only(argc,argv,optstr,longopts,&longindex):
			getopt_long(argc,argv,optstr,longopts,&longindex)))
	       != EOF)
		if (opt == '?' || opt == ':' )
			exit_code = 1;
		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));
			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++]));
		puts("");
	}
	return exit_code;
}

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

/* Register a long option. The contents of name is copied. */
void add_longopt(const char *name, int has_arg)
{
	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) { /* 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;
		long_options[long_options_nr-1].name=xstrdup(name);
	}
	long_options_nr++;
}


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

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
		bb_error_msg("unknown shell after -s or --shell argument");
}


/* 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
 */

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'},
	{"alternative",no_argument,NULL,'a'},
	{"name",required_argument,NULL,'n'},
	{NULL,0,NULL,0}
};

/* Stop scanning as soon as a non-option argument is found! */
static const char shortopts[]="+ao:l:n:qQs:Tu";


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

	init_longopt();

	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 0;
		} else
			bb_error_msg_and_die("missing optstring argument");
	}

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

		quote=0;
		s=xmalloc(strlen(argv[1])+1);
		strcpy(s,argv[1]+strspn(argv[1],"-+"));
		argv[1]=argv[0];
		return generate_output(argv+1,argc-1,s,long_options);
	}

	while ((opt = getopt_long(argc,argv,shortopts,longopts,NULL)) != EOF)
		switch (opt) {
		case 'a':
			alternative=1;
			break;
		case 'o':
			optstr = optarg;
			break;
		case 'l':
			add_long_options(optarg);
			break;
		case 'n':
			name = optarg;
			break;
		case 'q':
			quiet_errors=1;
			break;
		case 'Q':
			quiet_output=1;
			break;
		case 's':
			set_shell(optarg);
			break;
		case 'T':
			return 4;
		case 'u':
			quote=0;
			break;
		default:
			bb_show_usage();
		}

	if (!optstr) {
		if (optind >= argc)
			bb_error_msg_and_die("missing optstring argument");
		else optstr=argv[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	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			* Added NLS support (partly written by Arkadiusz Mi<B6>kiewicz
26			* <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 "busybox.h"
35			#include <getopt.h>
36
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			/* LONG_OPT is the code that is returned when a long option is found. */
42			LONG_OPT = 2
43			};
44
45			/* The shells recognized. */
46			typedef enum {BASH,TCSH} shell_t;
47
48
49			/* Some global variables that tells us how to parse. */
50			static shell_t shell=BASH; /* The shell we generate output for. */
51			static int quiet_errors; /* 0 is not quiet. */
52			static int quiet_output; /* 0 is not quiet. */
53			static int quote=1; /* 1 is do quote. */
54			static int alternative; /* 0 is getopt_long, 1 is getopt_long_only */
55
56			/* Function prototypes */
57			static const char normalize(const char arg);
58			static int generate_output(char * argv[],int argc,const char *optstr,
59			const struct option *longopts);
60			static void add_long_options(char *options);
61			static void add_longopt(const char *name,int has_arg);
62			static void set_shell(const char *new_shell);
63
64
65			/*
66			* This function 'normalizes' a single argument: it puts single quotes around
67			* it and escapes other special characters. If quote is false, it just
68			* returns its argument.
69			* Bash only needs special treatment for single quotes; tcsh also recognizes
70			* exclamation marks within single quotes, and nukes whitespace.
71			* This function returns a pointer to a buffer that is overwritten by
72			* each call.
73			*/
74			const char normalize(const char arg)
75			{
76			static char *BUFFER=NULL;
77			const char *argptr=arg;
78			char *bufptr;
79
80			free(BUFFER);
81
82			if (!quote) { /* Just copy arg */
83			BUFFER=xstrdup(arg);
84			return BUFFER;
85			}
86
87			/* Each character in arg may take up to four characters in the result:
88			For a quote we need a closing quote, a backslash, a quote and an
89			opening quote! We need also the global opening and closing quote,
90			and one extra character for '\0'. */
91			BUFFER=xmalloc(strlen(arg)*4+3);
92
93			bufptr=BUFFER;
94			*bufptr++='\'';
95
96			while (*argptr) {
97			if (*argptr == '\'') {
98			/* Quote: replace it with: '\'' */
99			*bufptr++='\'';
100			*bufptr++='\\';
101			*bufptr++='\'';
102			*bufptr++='\'';
103			} else if (shell==TCSH && *argptr=='!') {
104			/* Exclamation mark: replace it with: \! */
105			*bufptr++='\'';
106			*bufptr++='\\';
107			*bufptr++='!';
108			*bufptr++='\'';
109			} else if (shell==TCSH && *argptr=='\n') {
110			/* Newline: replace it with: \n */
111			*bufptr++='\\';
112			*bufptr++='n';
113			} else if (shell==TCSH && isspace(*argptr)) {
114			/* Non-newline whitespace: replace it with \<ws> */
115			*bufptr++='\'';
116			*bufptr++='\\';
117			bufptr++=argptr;
118			*bufptr++='\'';
119			} else
120			/* Just copy */
121			bufptr++=argptr;
122			argptr++;
123			}
124			*bufptr++='\'';
125			*bufptr++='\0';
126			return BUFFER;
127			}
128
129			/*
130			* Generate the output. argv[0] is the program name (used for reporting errors).
131			* argv[1..] contains the options to be parsed. argc must be the number of
132			* elements in argv (ie. 1 if there are no options, only the program name),
133			* optstr must contain the short options, and longopts the long options.
134			* Other settings are found in global variables.
135			*/
136			int generate_output(char * argv[],int argc,const char *optstr,
137			const struct option *longopts)
138			{
139			int exit_code = 0; /* We assume everything will be OK */
140			int opt;
141			int longindex;
142			const char *charptr;
143
144			if (quiet_errors) /* No error reporting from getopt(3) */
145			opterr=0;
146			optind=0; /* Reset getopt(3) */
147
148			while ((opt = (alternative?
149			getopt_long_only(argc,argv,optstr,longopts,&longindex):
150			getopt_long(argc,argv,optstr,longopts,&longindex)))
151			!= EOF)
152			if (opt == '?' \|\| opt == ':' )
153			exit_code = 1;
154			else if (!quiet_output) {
155			if (opt == LONG_OPT) {
156			printf(" --%s",longopts[longindex].name);
157			if (longopts[longindex].has_arg)
158			printf(" %s",
159			normalize(optarg?optarg:""));
160			} else if (opt == NON_OPT)
161			printf(" %s",normalize(optarg));
162			else {
163			printf(" -%c",opt);
164			charptr = strchr(optstr,opt);
165			if (charptr != NULL && *++charptr == ':')
166			printf(" %s",
167			normalize(optarg?optarg:""));
168			}
169			}
170
171			if (! quiet_output) {
172			printf(" --");
173			while (optind < argc)
174			printf(" %s",normalize(argv[optind++]));
175			puts("");
176			}
177			return exit_code;
178			}
179
180			static struct option *long_options;
181			static int long_options_length; /* Length of array */
182			static int long_options_nr; /* Nr of used elements in array */
183			enum { LONG_OPTIONS_INCR = 10 };
184			#define init_longopt() add_longopt(NULL,0)
185
186			/* Register a long option. The contents of name is copied. */
187			void add_longopt(const char *name, int has_arg)
188			{
189			if (!name) { /* init */
190			free(long_options);
191			long_options=NULL;
192			long_options_length=0;
193			long_options_nr=0;
194			}
195
196			if (long_options_nr == long_options_length) {
197			long_options_length += LONG_OPTIONS_INCR;
198			long_options=xrealloc(long_options,
199			sizeof(struct option) *
200			long_options_length);
201			}
202
203			long_options[long_options_nr].name=NULL;
204			long_options[long_options_nr].has_arg=0;
205			long_options[long_options_nr].flag=NULL;
206			long_options[long_options_nr].val=0;
207
208			if (long_options_nr) { /* Not for init! */
209			long_options[long_options_nr-1].has_arg=has_arg;
210			long_options[long_options_nr-1].flag=NULL;
211			long_options[long_options_nr-1].val=LONG_OPT;
212			long_options[long_options_nr-1].name=xstrdup(name);
213			}
214			long_options_nr++;
215			}
216
217
218			/*
219			* Register several long options. options is a string of long options,
220			* separated by commas or whitespace.
221			* This nukes options!
222			*/
223			void add_long_options(char *options)
224			{
225			int arg_opt, tlen;
226			char *tokptr=strtok(options,", \t\n");
227			while (tokptr) {
228			arg_opt=no_argument;
229			tlen=strlen(tokptr);
230			if (tlen > 0) {
231			if (tokptr[tlen-1] == ':') {
232			if (tlen > 1 && tokptr[tlen-2] == ':') {
233			tokptr[tlen-2]='\0';
234			tlen -= 2;
235			arg_opt=optional_argument;
236			} else {
237			tokptr[tlen-1]='\0';
238			tlen -= 1;
239			arg_opt=required_argument;
240			}
241			if (tlen == 0)
242			bb_error_msg("empty long option after -l or --long argument");
243			}
244			add_longopt(tokptr,arg_opt);
245			}
246			tokptr=strtok(NULL,", \t\n");
247			}
248			}
249
250			void set_shell(const char *new_shell)
251			{
252			if (!strcmp(new_shell,"bash"))
253			shell=BASH;
254			else if (!strcmp(new_shell,"tcsh"))
255			shell=TCSH;
256			else if (!strcmp(new_shell,"sh"))
257			shell=BASH;
258			else if (!strcmp(new_shell,"csh"))
259			shell=TCSH;
260			else
261			bb_error_msg("unknown shell after -s or --shell argument");
262			}
263
264
265			/* Exit codes:
266			* 0) No errors, successful operation.
267			* 1) getopt(3) returned an error.
268			* 2) A problem with parameter parsing for getopt(1).
269			* 3) Internal error, out of memory
270			* 4) Returned for -T
271			*/
272
273			static const struct option longopts[]=
274			{
275			{"options",required_argument,NULL,'o'},
276			{"longoptions",required_argument,NULL,'l'},
277			{"quiet",no_argument,NULL,'q'},
278			{"quiet-output",no_argument,NULL,'Q'},
279			{"shell",required_argument,NULL,'s'},
280			{"test",no_argument,NULL,'T'},
281			{"unquoted",no_argument,NULL,'u'},
282			{"alternative",no_argument,NULL,'a'},
283			{"name",required_argument,NULL,'n'},
284			{NULL,0,NULL,0}
285			};
286
287			/* Stop scanning as soon as a non-option argument is found! */
288			static const char shortopts[]="+ao:l:n:qQs:Tu";
289
290
291			int getopt_main(int argc, char *argv[])
292			{
293			const char *optstr = NULL;
294			char *name = NULL;
295			int opt;
296			int compatible=0;
297
298			init_longopt();
299
300			if (getenv("GETOPT_COMPATIBLE"))
301			compatible=1;
302
303			if (argc == 1) {
304			if (compatible) {
305			/* For some reason, the original getopt gave no error
306			when there were no arguments. */
307			printf(" --\n");
308			return 0;
309			} else
310			bb_error_msg_and_die("missing optstring argument");
311			}
312
313			if (argv[1][0] != '-' \|\| compatible) {
314			char *s;
315
316			quote=0;
317			s=xmalloc(strlen(argv[1])+1);
318			strcpy(s,argv[1]+strspn(argv[1],"-+"));
319			argv[1]=argv[0];
320			return generate_output(argv+1,argc-1,s,long_options);
321			}
322
323			while ((opt = getopt_long(argc,argv,shortopts,longopts,NULL)) != EOF)
324			switch (opt) {
325			case 'a':
326			alternative=1;
327			break;
328			case 'o':
329			optstr = optarg;
330			break;
331			case 'l':
332			add_long_options(optarg);
333			break;
334			case 'n':
335			name = optarg;
336			break;
337			case 'q':
338			quiet_errors=1;
339			break;
340			case 'Q':
341			quiet_output=1;
342			break;
343			case 's':
344			set_shell(optarg);
345			break;
346			case 'T':
347			return 4;
348			case 'u':
349			quote=0;
350			break;
351			default:
352			bb_show_usage();
353			}
354
355			if (!optstr) {
356			if (optind >= argc)
357			bb_error_msg_and_die("missing optstring argument");
358			else optstr=argv[optind++];
359			}
360			if (name)
361			argv[optind-1]=name;
362			else
363			argv[optind-1]=argv[0];
364			return generate_output(argv+optind-1,argc-optind+1,optstr,long_options);
365			}