1 /* $NetBSD: args.c,v 1.43 2024/01/26 07:10:04 mlelstv Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Keith Muller of the University of California, San Diego and Lance 9 * Visser of Convex Computer Corporation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)args.c 8.3 (Berkeley) 4/2/94"; 40 #else 41 __RCSID("$NetBSD: args.c,v 1.43 2024/01/26 07:10:04 mlelstv Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/time.h> 47 48 #ifndef NO_IOFLAG 49 #include <fcntl.h> 50 #endif /* NO_IOFLAG */ 51 #include <err.h> 52 #include <errno.h> 53 #include <limits.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 58 #include "dd.h" 59 #include "extern.h" 60 61 static int c_arg(const void *, const void *); 62 63 #ifdef NO_MSGFMT 64 static void f_msgfmt(char *) __dead; 65 #else 66 static void f_msgfmt(char *); 67 #endif /* NO_MSGFMT */ 68 69 #ifdef NO_CONV 70 static void f_conv(char *) __dead; 71 #else 72 static void f_conv(char *); 73 static int c_conv(const void *, const void *); 74 #endif /* NO_CONV */ 75 76 #ifdef NO_IOFLAG 77 static void f_iflag(char *) __dead; 78 static void f_oflag(char *) __dead; 79 #else 80 static void f_iflag(char *); 81 static void f_oflag(char *); 82 static u_int f_ioflag(char *, u_int); 83 static int c_ioflag(const void *, const void *); 84 #endif /* NO_IOFLAG */ 85 86 static void f_bs(char *); 87 static void f_cbs(char *); 88 static void f_count(char *); 89 static void f_files(char *); 90 static void f_ibs(char *); 91 static void f_if(char *); 92 static void f_obs(char *); 93 static void f_of(char *); 94 static void f_seek(char *); 95 static void f_skip(char *); 96 static void f_progress(char *); 97 98 static const struct arg { 99 const char *name; 100 void (*f)(char *); 101 u_int set, noset; 102 } args[] = { 103 /* the array needs to be sorted by the first column so 104 bsearch() can be used to find commands quickly */ 105 { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC }, 106 { "cbs", f_cbs, C_CBS, C_CBS }, 107 { "conv", f_conv, 0, 0 }, 108 { "count", f_count, C_COUNT, C_COUNT }, 109 { "files", f_files, C_FILES, C_FILES }, 110 { "ibs", f_ibs, C_IBS, C_BS|C_IBS }, 111 { "if", f_if, C_IF, C_IF }, 112 { "iflag", f_iflag, C_IFLAG, C_IFLAG }, 113 { "iseek", f_skip, C_SKIP, C_SKIP }, 114 { "msgfmt", f_msgfmt, 0, 0 }, 115 { "obs", f_obs, C_OBS, C_BS|C_OBS }, 116 { "of", f_of, C_OF, C_OF }, 117 { "oflag", f_oflag, C_OFLAG, C_OFLAG }, 118 { "oseek", f_seek, C_SEEK, C_SEEK }, 119 { "progress", f_progress, 0, 0 }, 120 { "seek", f_seek, C_SEEK, C_SEEK }, 121 { "skip", f_skip, C_SKIP, C_SKIP }, 122 }; 123 124 /* 125 * args -- parse JCL syntax of dd. 126 */ 127 void 128 jcl(char **argv) 129 { 130 const struct arg *ap; 131 struct arg tmp; 132 char *oper, *arg; 133 134 in.dbsz = out.dbsz = 512; 135 136 while ((oper = *++argv) != NULL) { 137 if ((oper = strdup(oper)) == NULL) { 138 errx(EXIT_FAILURE, 139 "unable to allocate space for the argument %s", 140 *argv); 141 /* NOTREACHED */ 142 } 143 if ((arg = strchr(oper, '=')) == NULL) { 144 errx(EXIT_FAILURE, "unknown operand %s", oper); 145 /* NOTREACHED */ 146 } 147 *arg++ = '\0'; 148 if (!*arg) { 149 errx(EXIT_FAILURE, "no value specified for %s", oper); 150 /* NOTREACHED */ 151 } 152 tmp.name = oper; 153 if (!(ap = bsearch(&tmp, args, 154 __arraycount(args), sizeof(*args), c_arg))) { 155 errx(EXIT_FAILURE, "unknown operand %s", tmp.name); 156 /* NOTREACHED */ 157 } 158 if (ddflags & ap->noset) { 159 errx(EXIT_FAILURE, 160 "%s: illegal argument combination or already set", 161 tmp.name); 162 /* NOTREACHED */ 163 } 164 ddflags |= ap->set; 165 ap->f(arg); 166 } 167 168 /* Final sanity checks. */ 169 170 if (ddflags & C_BS) { 171 /* 172 * Bs is turned off by any conversion -- we assume the user 173 * just wanted to set both the input and output block sizes 174 * and didn't want the bs semantics, so we don't warn. 175 */ 176 if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE | 177 C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) { 178 ddflags &= ~C_BS; 179 ddflags |= C_IBS|C_OBS; 180 } 181 182 /* Bs supersedes ibs and obs. */ 183 if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) 184 warnx("bs supersedes ibs and obs"); 185 } 186 187 /* 188 * Ascii/ebcdic and cbs implies block/unblock. 189 * Block/unblock requires cbs and vice-versa. 190 */ 191 if (ddflags & (C_BLOCK|C_UNBLOCK)) { 192 if (!(ddflags & C_CBS)) { 193 errx(EXIT_FAILURE, "record operations require cbs"); 194 /* NOTREACHED */ 195 } 196 cfunc = ddflags & C_BLOCK ? block : unblock; 197 } else if (ddflags & C_CBS) { 198 if (ddflags & (C_ASCII|C_EBCDIC)) { 199 if (ddflags & C_ASCII) { 200 ddflags |= C_UNBLOCK; 201 cfunc = unblock; 202 } else { 203 ddflags |= C_BLOCK; 204 cfunc = block; 205 } 206 } else { 207 errx(EXIT_FAILURE, 208 "cbs meaningless if not doing record operations"); 209 /* NOTREACHED */ 210 } 211 } else 212 cfunc = def; 213 214 /* Read, write and seek calls take off_t as arguments. 215 * 216 * The following check is not done because an off_t is a quad 217 * for current NetBSD implementations. 218 * 219 * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz) 220 * errx(1, "seek offsets cannot be larger than %d", INT_MAX); 221 */ 222 } 223 224 static int 225 c_arg(const void *a, const void *b) 226 { 227 228 return (strcmp(((const struct arg *)a)->name, 229 ((const struct arg *)b)->name)); 230 } 231 232 static void 233 f_bs(char *arg) 234 { 235 236 in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX); 237 } 238 239 static void 240 f_cbs(char *arg) 241 { 242 243 cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX); 244 } 245 246 static void 247 f_count(char *arg) 248 { 249 250 cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX); 251 if (!cpy_cnt) { 252 summary(); 253 exit(0); 254 } 255 } 256 257 static void 258 f_files(char *arg) 259 { 260 261 files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX); 262 if (!files_cnt) { 263 summary(); 264 exit(0); 265 } 266 } 267 268 static void 269 f_ibs(char *arg) 270 { 271 272 if (!(ddflags & C_BS)) 273 in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX); 274 } 275 276 static void 277 f_if(char *arg) 278 { 279 280 in.name = arg; 281 } 282 283 #ifdef NO_MSGFMT 284 /* Build a small version (i.e. for a ramdisk root) */ 285 static void 286 f_msgfmt(char *arg) 287 { 288 289 errx(EXIT_FAILURE, "msgfmt option disabled"); 290 /* NOTREACHED */ 291 } 292 #else /* NO_MSGFMT */ 293 static void 294 f_msgfmt(char *arg) 295 { 296 297 /* 298 * If the format string is not valid, dd_write_msg() will print 299 * an error and exit. 300 */ 301 dd_write_msg(arg, 0); 302 303 msgfmt = arg; 304 } 305 #endif /* NO_MSGFMT */ 306 307 static void 308 f_obs(char *arg) 309 { 310 311 if (!(ddflags & C_BS)) 312 out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX); 313 } 314 315 static void 316 f_of(char *arg) 317 { 318 319 out.name = arg; 320 } 321 322 static void 323 f_seek(char *arg) 324 { 325 326 out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX); 327 } 328 329 static void 330 f_skip(char *arg) 331 { 332 333 in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX); 334 } 335 336 static void 337 f_progress(char *arg) 338 { 339 340 progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX); 341 } 342 343 #ifdef NO_CONV 344 /* Build a small version (i.e. for a ramdisk root) */ 345 static void 346 f_conv(char *arg) 347 { 348 349 errx(EXIT_FAILURE, "conv option disabled"); 350 /* NOTREACHED */ 351 } 352 #else /* NO_CONV */ 353 354 static const struct conv { 355 const char *name; 356 u_int set, noset; 357 const u_char *ctab; 358 } clist[] = { 359 { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, 360 { "block", C_BLOCK, C_UNBLOCK, NULL }, 361 { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, 362 { "ibm", C_EBCDIC, C_ASCII, a2ibm }, 363 { "lcase", C_LCASE, C_UCASE, NULL }, 364 { "noerror", C_NOERROR, 0, NULL }, 365 { "notrunc", C_NOTRUNC, 0, NULL }, 366 { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, 367 { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, 368 { "oldibm", C_EBCDIC, C_ASCII, a2ibm }, 369 { "osync", C_OSYNC, C_BS, NULL }, 370 { "sparse", C_SPARSE, 0, NULL }, 371 { "swab", C_SWAB, 0, NULL }, 372 { "sync", C_SYNC, 0, NULL }, 373 { "ucase", C_UCASE, C_LCASE, NULL }, 374 { "unblock", C_UNBLOCK, C_BLOCK, NULL }, 375 /* If you add items to this table, be sure to add the 376 * conversions to the C_BS check in the jcl routine above. 377 */ 378 }; 379 380 static void 381 f_conv(char *arg) 382 { 383 const struct conv *cp; 384 struct conv tmp; 385 386 while (arg != NULL) { 387 tmp.name = strsep(&arg, ","); 388 if (!(cp = bsearch(&tmp, clist, 389 __arraycount(clist), sizeof(*clist), c_conv))) { 390 errx(EXIT_FAILURE, "unknown conversion %s", tmp.name); 391 /* NOTREACHED */ 392 } 393 if (ddflags & cp->noset) { 394 errx(EXIT_FAILURE, 395 "%s: illegal conversion combination", tmp.name); 396 /* NOTREACHED */ 397 } 398 ddflags |= cp->set; 399 if (cp->ctab) 400 ctab = cp->ctab; 401 } 402 } 403 404 static int 405 c_conv(const void *a, const void *b) 406 { 407 408 return (strcmp(((const struct conv *)a)->name, 409 ((const struct conv *)b)->name)); 410 } 411 412 #endif /* NO_CONV */ 413 414 static void 415 f_iflag(char *arg) 416 { 417 /* Build a small version (i.e. for a ramdisk root) */ 418 #ifdef NO_IOFLAG 419 errx(EXIT_FAILURE, "iflag option disabled"); 420 /* NOTREACHED */ 421 #else 422 iflag = f_ioflag(arg, C_IFLAG); 423 return; 424 #endif 425 } 426 427 static void 428 f_oflag(char *arg) 429 { 430 /* Build a small version (i.e. for a ramdisk root) */ 431 #ifdef NO_IOFLAG 432 errx(EXIT_FAILURE, "oflag option disabled"); 433 /* NOTREACHED */ 434 #else 435 oflag = f_ioflag(arg, C_OFLAG); 436 return; 437 #endif 438 } 439 440 #ifndef NO_IOFLAG 441 static const struct ioflag { 442 const char *name; 443 u_int set; 444 u_int allowed; 445 } olist[] = { 446 /* the array needs to be sorted by the first column so 447 bsearch() can be used to find commands quickly */ 448 { "alt_io", O_ALT_IO, C_IFLAG|C_OFLAG }, 449 { "append", O_APPEND, C_OFLAG }, 450 { "async", O_ASYNC, C_IFLAG|C_OFLAG }, 451 { "cloexec", O_CLOEXEC, C_IFLAG|C_OFLAG }, 452 { "creat", O_CREAT, C_OFLAG }, 453 { "direct", O_DIRECT, C_IFLAG|C_OFLAG }, 454 { "directory", O_DIRECTORY, C_NONE }, 455 { "dsync", O_DSYNC, C_OFLAG }, 456 { "excl", O_EXCL, C_OFLAG }, 457 { "exlock", O_EXLOCK, C_IFLAG|C_OFLAG }, 458 { "noctty", O_NOCTTY, C_IFLAG|C_OFLAG }, 459 { "nofollow", O_NOFOLLOW, C_IFLAG|C_OFLAG }, 460 { "nonblock", O_NONBLOCK, C_IFLAG|C_OFLAG }, 461 { "nosigpipe", O_NOSIGPIPE, C_IFLAG|C_OFLAG }, 462 { "rdonly", O_RDONLY, C_IFLAG }, 463 { "rdwr", O_RDWR, C_IFLAG }, 464 { "rsync", O_RSYNC, C_IFLAG }, 465 { "shlock", O_SHLOCK, C_IFLAG|C_OFLAG }, 466 { "sync", O_SYNC, C_IFLAG|C_OFLAG }, 467 { "trunc", O_TRUNC, C_OFLAG }, 468 { "wronly", O_WRONLY, C_OFLAG }, 469 }; 470 471 static u_int 472 f_ioflag(char *arg, u_int flagtype) 473 { 474 u_int ioflag = 0; 475 const struct ioflag *cp; 476 struct ioflag tmp; 477 const char *flagstr = (flagtype == C_IFLAG) ? "iflag" : "oflag"; 478 479 while (arg != NULL) { 480 tmp.name = strsep(&arg, ","); 481 if (!(cp = bsearch(&tmp, olist, 482 __arraycount(olist), sizeof(*olist), c_ioflag))) { 483 errx(EXIT_FAILURE, "unknown %s %s", flagstr, tmp.name); 484 /* NOTREACHED */ 485 } 486 487 if ((cp->set & O_ACCMODE) && (flagtype == C_OFLAG)) { 488 warnx("rdonly, rdwr and wronly are ignored for oflag"); 489 continue; 490 } 491 492 if ((cp->allowed & flagtype) == 0) { 493 warnx("%s set for %s but makes no sense", 494 cp->name, flagstr); 495 } 496 497 ioflag |= cp->set; 498 } 499 500 501 return ioflag; 502 } 503 504 static int 505 c_ioflag(const void *a, const void *b) 506 { 507 508 return (strcmp(((const struct ioflag *)a)->name, 509 ((const struct ioflag *)b)->name)); 510 } 511 #endif /* NO_IOFLAG */ 512
Indexes created Sat Sep 20 22:09:52 GMT 2025