/[public]/getopt/trunk/getopt.c
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1/* 1/*
2 * getopt.c - Enhanced implementation of BSD getopt(1) 2 * getopt.c - Enhanced implementation of BSD getopt(1)
3 * Copyright (c) 1997-2005 Frodo Looijaard <frodo@frodo.looijaard.name> 3 * Copyright (c) 1997-2014 Frodo Looijaard <frodo@frodo.looijaard.name>
4 * 4 *
5 * This program is free software; you can redistribute it and/or modify 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 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 7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version. 8 * (at your option) any later version.
… …
10 * This program is distributed in the hope that it will be useful, 10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details. 13 * GNU General Public License for more details.
14 * 14 *
15 * You should have received a copy of the GNU General Public License 15 * You should have received a copy of the GNU General Public License along
16 * along with this program; if not, write to the Free Software 16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */ 18 */
19 19
20/* 20/*
21 * Version 1.0-b4: Tue Sep 23 1997. First public release. 21 * Version 1.0-b4: Tue Sep 23 1997. First public release.
22 * Version 1.0: Wed Nov 19 1997. 22 * Version 1.0: Wed Nov 19 1997.
23 * Bumped up the version number to 1.0 23 * Bumped up the version number to 1.0
24 * Fixed minor typo (CSH instead of TCSH) 24 * Fixed minor typo (CSH instead of TCSH)
25 * Version 1.0.1: Tue Jun 3 1998 25 * Version 1.0.1: Tue Jun 3 1998
26 * Fixed sizeof instead of strlen bug 26 * Fixed sizeof instead of strlen bug
27 * Bumped up the version number to 1.0.1 27 * Bumped up the version number to 1.0.1
… …
31 * Version 1.0.5: Tue Jun 22 1999 31 * Version 1.0.5: Tue Jun 22 1999
32 * Make -u option work (not present) 32 * Make -u option work (not present)
33 * Version 1.0.6: Tue Jun 27 2000 33 * Version 1.0.6: Tue Jun 27 2000
34 * No important changes 34 * No important changes
35 * Version 1.1.0: Tue Jun 30 2000 35 * Version 1.1.0: Tue Jun 30 2000
36 * Added NLS support (partly written by Arkadiusz Miśkiewicz 36 * Added NLS support (partly written by Arkadiusz Miśkiewicz
37 * <misiek@pld.org.pl>) 37 * <misiek@pld.org.pl>)
38 * Version 1.1.4: Mon Nov 7 2005 38 * Version 1.1.4: Mon Nov 7 2005
39 * Fixed a few type's in the manpage 39 * Fixed a few type's in the manpage
40 * Version 1.1.5: Sun Aug 12 2012 40 * Version 1.1.5: Sun Aug 12 2012
41 * Sync with util-linux-2.21, fixed build problems, many new translations 41 * Sync with util-linux-2.21, fixed build problems, many new translations
42 */ 42 */
43 43
44/* Exit codes: 44/* Exit codes:
45 * 0) No errors, succesful operation. 45 * 0) No errors, successful operation.
46 * 1) getopt(3) returned an error. 46 * 1) getopt(3) returned an error.
47 * 2) A problem with parameter parsing for getopt(1). 47 * 2) A problem with parameter parsing for getopt(1).
48 * 3) Internal error, out of memory 48 * 3) Internal error, out of memory
49 * 4) Returned for -T 49 * 4) Returned for -T
50 */ 50 */
… …
67 67
68#include "util-linux-compat.h" 68#include "util-linux-compat.h"
69#include "nls.h" 69#include "nls.h"
70#include "xalloc.h" 70#include "xalloc.h"
71 71
72/* NON_OPT is the code that is returned when a non-option is found in '+' 72/* NON_OPT is the code that is returned when a non-option is found in '+'
73 * mode */ 73 * mode */
74#define NON_OPT 1 74#define NON_OPT 1
75/* LONG_OPT is the code that is returned when a long option is found. */ 75/* LONG_OPT is the code that is returned when a long option is found. */
76#define LONG_OPT 2 76#define LONG_OPT 2
77 77
… …
91 91
92/* Function prototypes */ 92/* Function prototypes */
93static const char *normalize(const char *arg); 93static const char *normalize(const char *arg);
94static int generate_output(char *argv[], int argc, const char *optstr, 94static int generate_output(char *argv[], int argc, const char *optstr,
95 const struct option *longopts); 95 const struct option *longopts);
96int main(int argc, char *argv[]);
97static void parse_error(const char *message); 96static void parse_error(const char *message);
98static void add_long_options(char *options); 97static void add_long_options(char *options);
99static void add_longopt(const char *name, int has_arg); 98static void add_longopt(const char *name, int has_arg);
100static void print_help(void); 99static void print_help(void);
101static void set_shell(const char *new_shell); 100static void set_shell(const char *new_shell);
… …
123 strcpy(BUFFER, arg); 122 strcpy(BUFFER, arg);
124 return BUFFER; 123 return BUFFER;
125 } 124 }
126 125
127 /* 126 /*
128 * Each character in arg may take upto four characters in the 127 * Each character in arg may take up to four characters in the
129 * result: For a quote we need a closing quote, a backslash, a quote 128 * result: For a quote we need a closing quote, a backslash, a quote
130 * and an opening quote! We need also the global opening and closing 129 * and an opening quote! We need also the global opening and closing
131 * quote, and one extra character for '\0'. 130 * quote, and one extra character for '\0'.
132 */ 131 */
133 BUFFER = xmalloc(strlen(arg) * 4 + 3); 132 BUFFER = xmalloc(strlen(arg) * 4 + 3);
… …
166 *bufptr++ = '\''; 165 *bufptr++ = '\'';
167 *bufptr++ = '\0'; 166 *bufptr++ = '\0';
168 return BUFFER; 167 return BUFFER;
169} 168}
170 169
171/* 170/*
172 * Generate the output. argv[0] is the program name (used for reporting errors). 171 * Generate the output. argv[0] is the program name (used for reporting errors).
173 * argv[1..] contains the options to be parsed. argc must be the number of 172 * argv[1..] contains the options to be parsed. argc must be the number of
174 * elements in argv (ie. 1 if there are no options, only the program name), 173 * elements in argv (ie. 1 if there are no options, only the program name),
175 * optstr must contain the short options, and longopts the long options. 174 * optstr must contain the short options, and longopts the long options.
176 * Other settings are found in global variables. 175 * Other settings are found in global variables.
… …
223 * we already sent a message, we just exit with a helpful hint. 222 * we already sent a message, we just exit with a helpful hint.
224 */ 223 */
225static void __attribute__ ((__noreturn__)) parse_error(const char *message) 224static void __attribute__ ((__noreturn__)) parse_error(const char *message)
226{ 225{
227 if (message) 226 if (message)
228 fprintf(stderr, "%s: %s\n", program_invocation_short_name, message); 227 warnx("%s", message);
229 fprintf(stderr, _("Try `%s --help' for more information.\n"), 228 fprintf(stderr, _("Try `%s --help' for more information.\n"),
230 program_invocation_short_name); 229 program_invocation_short_name);
231 exit(PARAMETER_EXIT_CODE); 230 exit(PARAMETER_EXIT_CODE);
232} 231}
233 232
… …
272 } 271 }
273 long_options_nr++; 272 long_options_nr++;
274} 273}
275 274
276 275
277/* 276/*
278 * Register several long options. options is a string of long options, 277 * Register several long options. options is a string of long options,
279 * separated by commas or whitespace. This nukes options! 278 * separated by commas or whitespace. This nukes options!
280 */ 279 */
281static void add_long_options(char *options) 280static void add_long_options(char *options)
282{ 281{
… …
366 {"alternative", no_argument, NULL, 'a'}, 365 {"alternative", no_argument, NULL, 'a'},
367 {"name", required_argument, NULL, 'n'}, 366 {"name", required_argument, NULL, 'n'},
368 {"version", no_argument, NULL, 'V'}, 367 {"version", no_argument, NULL, 'V'},
369 {NULL, 0, NULL, 0} 368 {NULL, 0, NULL, 0}
370 }; 369 };
370
371 setlocale(LC_ALL, ""); 371 setlocale(LC_ALL, "");
372 bindtextdomain(PACKAGE, LOCALEDIR); 372 bindtextdomain(PACKAGE, LOCALEDIR);
373 textdomain(PACKAGE); 373 textdomain(PACKAGE);
374 374
375 init_longopt(); 375 init_longopt();
… …
388 return EXIT_SUCCESS; 388 return EXIT_SUCCESS;
389 } else 389 } else
390 parse_error(_("missing optstring argument")); 390 parse_error(_("missing optstring argument"));
391 } 391 }
392 392
393
394 if (argv[1][0] != '-' || compatible) { 393 if (argv[1][0] != '-' || compatible) {
395 quote = 0; 394 quote = 0;
396 optstr = xmalloc(strlen(argv[1]) + 1); 395 optstr = xmalloc(strlen(argv[1]) + 1);
397 strcpy(optstr, argv[1] + strspn(argv[1], "-+")); 396 strcpy(optstr, argv[1] + strspn(argv[1], "-+"));
398 argv[1] = argv[0]; 397 argv[1] = argv[0];
… …
442 case ':': 441 case ':':
443 parse_error(NULL); 442 parse_error(NULL);
444 default: 443 default:
445 parse_error(_("internal error, contact the author.")); 444 parse_error(_("internal error, contact the author."));
446 } 445 }
447 446
448 if (!optstr) { 447 if (!optstr) {
449 if (optind >= argc) 448 if (optind >= argc)
450 parse_error(_("missing optstring argument")); 449 parse_error(_("missing optstring argument"));
451 else { 450 else {
452 optstr = xmalloc(strlen(argv[optind]) + 1); 451 optstr = xmalloc(strlen(argv[optind]) + 1);
… …
456 } 455 }
457 if (name) 456 if (name)
458 argv[optind - 1] = name; 457 argv[optind - 1] = name;
459 else 458 else
460 argv[optind - 1] = argv[0]; 459 argv[optind - 1] = argv[0];
460
461 return generate_output(argv + optind - 1, argc-optind + 1, 461 return generate_output(argv + optind - 1, argc-optind + 1,
462 optstr, long_options); 462 optstr, long_options);
463} 463}
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