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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 | /* 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); } |