args.c revision 1.13
1 /* $NetBSD: args.c,v 1.13 1998/07/28 03:47:15 mycroft 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)args.c 8.3 (Berkeley) 4/2/94"; 44 #else 45 __RCSID("$NetBSD: args.c,v 1.13 1998/07/28 03:47:15 mycroft Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 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 __P((const void *, const void *)); 62 static int c_conv __P((const void *, const void *)); 63 static void f_bs __P((char *)); 64 static void f_cbs __P((char *)); 65 static void f_conv __P((char *)); 66 static void f_count __P((char *)); 67 static void f_files __P((char *)); 68 static void f_ibs __P((char *)); 69 static void f_if __P((char *)); 70 static void f_obs __P((char *)); 71 static void f_of __P((char *)); 72 static void f_seek __P((char *)); 73 static void f_skip __P((char *)); 74 static u_long get_bsz __P((char *)); 75 76 static const struct arg { 77 char *name; 78 void (*f) __P((char *)); 79 u_int set, noset; 80 } args[] = { 81 { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC }, 82 { "cbs", f_cbs, C_CBS, C_CBS }, 83 { "conv", f_conv, 0, 0 }, 84 { "count", f_count, C_COUNT, C_COUNT }, 85 { "files", f_files, C_FILES, C_FILES }, 86 { "ibs", f_ibs, C_IBS, C_BS|C_IBS }, 87 { "if", f_if, C_IF, C_IF }, 88 { "obs", f_obs, C_OBS, C_BS|C_OBS }, 89 { "of", f_of, C_OF, C_OF }, 90 { "seek", f_seek, C_SEEK, C_SEEK }, 91 { "skip", f_skip, C_SKIP, C_SKIP }, 92 }; 93 94 static char *oper; 95 96 /* 97 * args -- parse JCL syntax of dd. 98 */ 99 void 100 jcl(argv) 101 char **argv; 102 { 103 struct arg *ap, tmp; 104 char *arg; 105 106 in.dbsz = out.dbsz = 512; 107 108 while ((oper = *++argv) != NULL) { 109 if ((arg = strchr(oper, '=')) == NULL) 110 errx(1, "unknown operand %s", oper); 111 *arg++ = '\0'; 112 if (!*arg) 113 errx(1, "no value specified for %s", oper); 114 tmp.name = oper; 115 if (!(ap = (struct arg *)bsearch(&tmp, args, 116 sizeof(args)/sizeof(struct arg), sizeof(struct arg), 117 c_arg))) 118 errx(1, "unknown operand %s", tmp.name); 119 if (ddflags & ap->noset) 120 errx(1, "%s: illegal argument combination or already set", 121 tmp.name); 122 ddflags |= ap->set; 123 ap->f(arg); 124 } 125 126 /* Final sanity checks. */ 127 128 if (ddflags & C_BS) { 129 /* 130 * Bs is turned off by any conversion -- we assume the user 131 * just wanted to set both the input and output block sizes 132 * and didn't want the bs semantics, so we don't warn. 133 */ 134 if (ddflags & (C_BLOCK|C_LCASE|C_SWAB|C_UCASE|C_UNBLOCK)) 135 ddflags &= ~C_BS; 136 137 /* Bs supersedes ibs and obs. */ 138 if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) 139 warnx("bs supersedes ibs and obs"); 140 } 141 142 /* 143 * Ascii/ebcdic and cbs implies block/unblock. 144 * Block/unblock requires cbs and vice-versa. 145 */ 146 if (ddflags & (C_BLOCK|C_UNBLOCK)) { 147 if (!(ddflags & C_CBS)) 148 errx(1, "record operations require cbs"); 149 if (cbsz == 0) 150 errx(1, "cbs cannot be zero"); 151 cfunc = ddflags & C_BLOCK ? block : unblock; 152 } else if (ddflags & C_CBS) { 153 if (ddflags & (C_ASCII|C_EBCDIC)) { 154 if (ddflags & C_ASCII) { 155 ddflags |= C_UNBLOCK; 156 cfunc = unblock; 157 } else { 158 ddflags |= C_BLOCK; 159 cfunc = block; 160 } 161 } else 162 errx(1, "cbs meaningless if not doing record operations"); 163 if (cbsz == 0) 164 errx(1, "cbs cannot be zero"); 165 } else 166 cfunc = def; 167 168 if (in.dbsz == 0 || out.dbsz == 0) 169 errx(1, "buffer sizes cannot be zero"); 170 171 /* 172 * Check to make sure that the buffers are not too large. 173 */ 174 if (in.dbsz > INT_MAX || out.dbsz > INT_MAX) 175 errx(1, "buffer sizes cannot be greater than %d", INT_MAX); 176 177 /* Read, write and seek calls take off_t as arguments. 178 * 179 * The following check is not done because an off_t is a quad 180 * for current NetBSD implementations. 181 * 182 * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz) 183 * errx(1, "seek offsets cannot be larger than %d", INT_MAX); 184 */ 185 } 186 187 static int 188 c_arg(a, b) 189 const void *a, *b; 190 { 191 192 return (strcmp(((const struct arg *)a)->name, 193 ((const struct arg *)b)->name)); 194 } 195 196 static void 197 f_bs(arg) 198 char *arg; 199 { 200 201 in.dbsz = out.dbsz = (int)get_bsz(arg); 202 } 203 204 static void 205 f_cbs(arg) 206 char *arg; 207 { 208 209 cbsz = (int)get_bsz(arg); 210 } 211 212 static void 213 f_count(arg) 214 char *arg; 215 { 216 217 cpy_cnt = (u_int)get_bsz(arg); 218 if (!cpy_cnt) 219 terminate(0); 220 } 221 222 static void 223 f_files(arg) 224 char *arg; 225 { 226 227 files_cnt = (int)get_bsz(arg); 228 } 229 230 static void 231 f_ibs(arg) 232 char *arg; 233 { 234 235 if (!(ddflags & C_BS)) 236 in.dbsz = (int)get_bsz(arg); 237 } 238 239 static void 240 f_if(arg) 241 char *arg; 242 { 243 244 in.name = arg; 245 } 246 247 static void 248 f_obs(arg) 249 char *arg; 250 { 251 252 if (!(ddflags & C_BS)) 253 out.dbsz = (int)get_bsz(arg); 254 } 255 256 static void 257 f_of(arg) 258 char *arg; 259 { 260 261 out.name = arg; 262 } 263 264 static void 265 f_seek(arg) 266 char *arg; 267 { 268 269 out.offset = (u_int)get_bsz(arg); 270 } 271 272 static void 273 f_skip(arg) 274 char *arg; 275 { 276 277 in.offset = (u_int)get_bsz(arg); 278 } 279 280 #ifdef NO_CONV 281 /* Build a small version (i.e. for a ramdisk root) */ 282 static void 283 f_conv(arg) 284 char *arg; 285 { 286 errx(1, "conv option disabled"); 287 } 288 #else /* NO_CONV */ 289 290 static const struct conv { 291 char *name; 292 u_int set, noset; 293 const u_char *ctab; 294 } clist[] = { 295 { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, 296 { "block", C_BLOCK, C_UNBLOCK, NULL }, 297 { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, 298 { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, 299 { "lcase", C_LCASE, C_UCASE, NULL }, 300 { "noerror", C_NOERROR, 0, NULL }, 301 { "notrunc", C_NOTRUNC, 0, NULL }, 302 { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, 303 { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, 304 { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V }, 305 { "osync", C_OSYNC, C_BS, NULL }, 306 { "swab", C_SWAB, 0, NULL }, 307 { "sync", C_SYNC, 0, NULL }, 308 { "ucase", C_UCASE, C_LCASE, NULL }, 309 { "unblock", C_UNBLOCK, C_BLOCK, NULL }, 310 }; 311 312 static void 313 f_conv(arg) 314 char *arg; 315 { 316 struct conv *cp, tmp; 317 318 while (arg != NULL) { 319 tmp.name = strsep(&arg, ","); 320 if (!(cp = (struct conv *)bsearch(&tmp, clist, 321 sizeof(clist)/sizeof(struct conv), sizeof(struct conv), 322 c_conv))) 323 errx(1, "unknown conversion %s", tmp.name); 324 if (ddflags & cp->noset) 325 errx(1, "%s: illegal conversion combination", tmp.name); 326 ddflags |= cp->set; 327 if (cp->ctab) 328 ctab = cp->ctab; 329 } 330 } 331 332 static int 333 c_conv(a, b) 334 const void *a, *b; 335 { 336 337 return (strcmp(((const struct conv *)a)->name, 338 ((const struct conv *)b)->name)); 339 } 340 341 #endif /* NO_CONV */ 342 343 /* 344 * Convert an expression of the following forms to an unsigned long. 345 * 1) A positive decimal number. 346 * 2) A positive decimal number followed by a b (mult by 512). 347 * 3) A positive decimal number followed by a k (mult by 1024). 348 * 4) A positive decimal number followed by a m (mult by 512). 349 * 5) A positive decimal number followed by a w (mult by sizeof int) 350 * 6) Two or more positive decimal numbers (with/without k,b or w). 351 * seperated by x (also * for backwards compatibility), specifying 352 * the product of the indicated values. 353 */ 354 static u_long 355 get_bsz(val) 356 char *val; 357 { 358 u_long num, t; 359 char *expr; 360 361 num = strtoul(val, &expr, 0); 362 if (num == ULONG_MAX) /* Overflow. */ 363 err(1, "%s", oper); 364 if (expr == val) /* No digits. */ 365 errx(1, "%s: illegal numeric value", oper); 366 367 switch (*expr) { 368 case 'b': 369 t = num; 370 num *= 512; 371 if (t > num) 372 goto erange; 373 ++expr; 374 break; 375 case 'k': 376 t = num; 377 num *= 1024; 378 if (t > num) 379 goto erange; 380 ++expr; 381 break; 382 case 'm': 383 t = num; 384 num *= 1048576; 385 if (t > num) 386 goto erange; 387 ++expr; 388 break; 389 case 'w': 390 t = num; 391 num *= sizeof(int); 392 if (t > num) 393 goto erange; 394 ++expr; 395 break; 396 } 397 398 switch (*expr) { 399 case '\0': 400 break; 401 case '*': /* Backward compatible. */ 402 case 'x': 403 t = num; 404 num *= get_bsz(expr + 1); 405 if (t > num) 406 erange: errx(1, "%s: %s", oper, strerror(ERANGE)); 407 break; 408 default: 409 errx(1, "%s: illegal numeric value", oper); 410 } 411 return (num); 412 } 413
Indexes created Sun Sep 21 20:09:37 GMT 2025