1 /* $NetBSD: args.c,v 1.40 2019/01/30 01:40:02 mrg 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 1.40 2019/01/30 01:40:02 mrg 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 struct arg *ap, tmp; 131 char *oper, *arg; 132 133 in.dbsz = out.dbsz = 512; 134 135 while ((oper = *++argv) != NULL) { 136 if ((oper = strdup(oper)) == NULL) { 137 errx(EXIT_FAILURE, 138 "unable to allocate space for the argument %s", 139 *argv); 140 /* NOTREACHED */ 141 } 142 if ((arg = strchr(oper, '=')) == NULL) { 143 errx(EXIT_FAILURE, "unknown operand %s", oper); 144 /* NOTREACHED */ 145 } 146 *arg++ = '\0'; 147 if (!*arg) { 148 errx(EXIT_FAILURE, "no value specified for %s", oper); 149 /* NOTREACHED */ 150 } 151 tmp.name = oper; 152 if (!(ap = bsearch(&tmp, args, 153 __arraycount(args), sizeof(*args), c_arg))) { 154 errx(EXIT_FAILURE, "unknown operand %s", tmp.name); 155 /* NOTREACHED */ 156 } 157 if (ddflags & ap->noset) { 158 errx(EXIT_FAILURE, 159 "%s: illegal argument combination or already set", 160 tmp.name); 161 /* NOTREACHED */ 162 } 163 ddflags |= ap->set; 164 ap->f(arg); 165 } 166 167 /* Final sanity checks. */ 168 169 if (ddflags & C_BS) { 170 /* 171 * Bs is turned off by any conversion -- we assume the user 172 * just wanted to set both the input and output block sizes 173 * and didn't want the bs semantics, so we don't warn. 174 */ 175 if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE | 176 C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) { 177 ddflags &= ~C_BS; 178 ddflags |= C_IBS|C_OBS; 179 } 180 181 /* Bs supersedes ibs and obs. */ 182 if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) 183 warnx("bs supersedes ibs and obs"); 184 } 185 186 /* 187 * Ascii/ebcdic and cbs implies block/unblock. 188 * Block/unblock requires cbs and vice-versa. 189 */ 190 if (ddflags & (C_BLOCK|C_UNBLOCK)) { 191 if (!(ddflags & C_CBS)) { 192 errx(EXIT_FAILURE, "record operations require cbs"); 193 /* NOTREACHED */ 194 } 195 cfunc = ddflags & C_BLOCK ? block : unblock; 196 } else if (ddflags & C_CBS) { 197 if (ddflags & (C_ASCII|C_EBCDIC)) { 198 if (ddflags & C_ASCII) { 199 ddflags |= C_UNBLOCK; 200 cfunc = unblock; 201 } else { 202 ddflags |= C_BLOCK; 203 cfunc = block; 204 } 205 } else { 206 errx(EXIT_FAILURE, 207 "cbs meaningless if not doing record operations"); 208 /* NOTREACHED */ 209 } 210 } else 211 cfunc = def; 212 213 /* Read, write and seek calls take off_t as arguments. 214 * 215 * The following check is not done because an off_t is a quad 216 * for current NetBSD implementations. 217 * 218 * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz) 219 * errx(1, "seek offsets cannot be larger than %d", INT_MAX); 220 */ 221 } 222 223 static int 224 c_arg(const void *a, const void *b) 225 { 226 227 return (strcmp(((const struct arg *)a)->name, 228 ((const struct arg *)b)->name)); 229 } 230 231 static void 232 f_bs(char *arg) 233 { 234 235 in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX); 236 } 237 238 static void 239 f_cbs(char *arg) 240 { 241 242 cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX); 243 } 244 245 static void 246 f_count(char *arg) 247 { 248 249 cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX); 250 if (!cpy_cnt) 251 terminate(0); 252 } 253 254 static void 255 f_files(char *arg) 256 { 257 258 files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX); 259 if (!files_cnt) 260 terminate(0); 261 } 262 263 static void 264 f_ibs(char *arg) 265 { 266 267 if (!(ddflags & C_BS)) 268 in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX); 269 } 270 271 static void 272 f_if(char *arg) 273 { 274 275 in.name = arg; 276 } 277 278 #ifdef NO_MSGFMT 279 /* Build a small version (i.e. for a ramdisk root) */ 280 static void 281 f_msgfmt(char *arg) 282 { 283 284 errx(EXIT_FAILURE, "msgfmt option disabled"); 285 /* NOTREACHED */ 286 } 287 #else /* NO_MSGFMT */ 288 static void 289 f_msgfmt(char *arg) 290 { 291 292 /* 293 * If the format string is not valid, dd_write_msg() will print 294 * an error and exit. 295 */ 296 dd_write_msg(arg, 0); 297 298 msgfmt = arg; 299 } 300 #endif /* NO_MSGFMT */ 301 302 static void 303 f_obs(char *arg) 304 { 305 306 if (!(ddflags & C_BS)) 307 out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX); 308 } 309 310 static void 311 f_of(char *arg) 312 { 313 314 out.name = arg; 315 } 316 317 static void 318 f_seek(char *arg) 319 { 320 321 out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX); 322 } 323 324 static void 325 f_skip(char *arg) 326 { 327 328 in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX); 329 } 330 331 static void 332 f_progress(char *arg) 333 { 334 335 progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX); 336 } 337 338 #ifdef NO_CONV 339 /* Build a small version (i.e. for a ramdisk root) */ 340 static void 341 f_conv(char *arg) 342 { 343 344 errx(EXIT_FAILURE, "conv option disabled"); 345 /* NOTREACHED */ 346 } 347 #else /* NO_CONV */ 348 349 static const struct conv { 350 const char *name; 351 u_int set, noset; 352 const u_char *ctab; 353 } clist[] = { 354 { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, 355 { "block", C_BLOCK, C_UNBLOCK, NULL }, 356 { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, 357 { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, 358 { "lcase", C_LCASE, C_UCASE, NULL }, 359 { "noerror", C_NOERROR, 0, NULL }, 360 { "notrunc", C_NOTRUNC, 0, NULL }, 361 { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, 362 { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, 363 { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V }, 364 { "osync", C_OSYNC, C_BS, NULL }, 365 { "sparse", C_SPARSE, 0, NULL }, 366 { "swab", C_SWAB, 0, NULL }, 367 { "sync", C_SYNC, 0, NULL }, 368 { "ucase", C_UCASE, C_LCASE, NULL }, 369 { "unblock", C_UNBLOCK, C_BLOCK, NULL }, 370 /* If you add items to this table, be sure to add the 371 * conversions to the C_BS check in the jcl routine above. 372 */ 373 }; 374 375 static void 376 f_conv(char *arg) 377 { 378 struct conv *cp, tmp; 379 380 while (arg != NULL) { 381 tmp.name = strsep(&arg, ","); 382 if (!(cp = bsearch(&tmp, clist, 383 __arraycount(clist), sizeof(*clist), c_conv))) { 384 errx(EXIT_FAILURE, "unknown conversion %s", tmp.name); 385 /* NOTREACHED */ 386 } 387 if (ddflags & cp->noset) { 388 errx(EXIT_FAILURE, 389 "%s: illegal conversion combination", tmp.name); 390 /* NOTREACHED */ 391 } 392 ddflags |= cp->set; 393 if (cp->ctab) 394 ctab = cp->ctab; 395 } 396 } 397 398 static int 399 c_conv(const void *a, const void *b) 400 { 401 402 return (strcmp(((const struct conv *)a)->name, 403 ((const struct conv *)b)->name)); 404 } 405 406 #endif /* NO_CONV */ 407 408 static void 409 f_iflag(char *arg) 410 { 411 /* Build a small version (i.e. for a ramdisk root) */ 412 #ifdef NO_IOFLAG 413 errx(EXIT_FAILURE, "iflag option disabled"); 414 /* NOTREACHED */ 415 #else 416 iflag = f_ioflag(arg, C_IFLAG); 417 return; 418 #endif 419 } 420 421 static void 422 f_oflag(char *arg) 423 { 424 /* Build a small version (i.e. for a ramdisk root) */ 425 #ifdef NO_IOFLAG 426 errx(EXIT_FAILURE, "oflag option disabled"); 427 /* NOTREACHED */ 428 #else 429 oflag = f_ioflag(arg, C_OFLAG); 430 return; 431 #endif 432 } 433 434 #ifndef NO_IOFLAG 435 static const struct ioflag { 436 const char *name; 437 u_int set; 438 u_int allowed; 439 } olist[] = { 440 /* the array needs to be sorted by the first column so 441 bsearch() can be used to find commands quickly */ 442 { "alt_io", O_ALT_IO, C_IFLAG|C_OFLAG }, 443 { "append", O_APPEND, C_OFLAG }, 444 { "async", O_ASYNC, C_IFLAG|C_OFLAG }, 445 { "cloexec", O_CLOEXEC, C_IFLAG|C_OFLAG }, 446 { "creat", O_CREAT, C_OFLAG }, 447 { "direct", O_DIRECT, C_IFLAG|C_OFLAG }, 448 { "directory", O_DIRECTORY, C_NONE }, 449 { "dsync", O_DSYNC, C_OFLAG }, 450 { "excl", O_EXCL, C_OFLAG }, 451 { "exlock", O_EXLOCK, C_IFLAG|C_OFLAG }, 452 { "noctty", O_NOCTTY, C_IFLAG|C_OFLAG }, 453 { "nofollow", O_NOFOLLOW, C_IFLAG|C_OFLAG }, 454 { "nonblock", O_NONBLOCK, C_IFLAG|C_OFLAG }, 455 { "nosigpipe", O_NOSIGPIPE, C_IFLAG|C_OFLAG }, 456 { "rdonly", O_RDONLY, C_IFLAG }, 457 { "rdwr", O_RDWR, C_IFLAG }, 458 { "rsync", O_RSYNC, C_IFLAG }, 459 { "shlock", O_SHLOCK, C_IFLAG|C_OFLAG }, 460 { "sync", O_SYNC, C_IFLAG|C_OFLAG }, 461 { "trunc", O_TRUNC, C_OFLAG }, 462 { "wronly", O_WRONLY, C_OFLAG }, 463 }; 464 465 static u_int 466 f_ioflag(char *arg, u_int flagtype) 467 { 468 u_int ioflag = 0; 469 struct ioflag *cp, tmp; 470 const char *flagstr = (flagtype == C_IFLAG) ? "iflag" : "oflag"; 471 472 while (arg != NULL) { 473 tmp.name = strsep(&arg, ","); 474 if (!(cp = bsearch(&tmp, olist, 475 __arraycount(olist), sizeof(*olist), c_ioflag))) { 476 errx(EXIT_FAILURE, "unknown %s %s", flagstr, tmp.name); 477 /* NOTREACHED */ 478 } 479 480 if ((cp->set & O_ACCMODE) && (flagtype == C_OFLAG)) { 481 warnx("rdonly, rdwr and wronly are ignored for oflag"); 482 continue; 483 } 484 485 if ((cp->allowed & flagtype) == 0) { 486 warnx("%s set for %s but makes no sense", 487 cp->name, flagstr); 488 } 489 490 ioflag |= cp->set; 491 } 492 493 494 return ioflag; 495 } 496 497 static int 498 c_ioflag(const void *a, const void *b) 499 { 500 501 return (strcmp(((const struct ioflag *)a)->name, 502 ((const struct ioflag *)b)->name)); 503 } 504 #endif /* NO_IOFLAG */ 505