1 /* $NetBSD: args.c,v 1.38 2013/07/17 12:55:48 christos 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 1.38 2013/07/17 12:55:48 christos Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/time.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <limits.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 55 #include "dd.h" 56 #include "extern.h" 57 58 static int c_arg(const void *, const void *); 59 60 #ifdef NO_MSGFMT 61 static void f_msgfmt(char *) __dead; 62 #else 63 static void f_msgfmt(char *); 64 #endif /* NO_MSGFMT */ 65 66 #ifdef NO_CONV 67 static void f_conv(char *) __dead; 68 #else 69 static void f_conv(char *); 70 static int c_conv(const void *, const void *); 71 #endif /* NO_CONV */ 72 73 static void f_bs(char *); 74 static void f_cbs(char *); 75 static void f_count(char *); 76 static void f_files(char *); 77 static void f_ibs(char *); 78 static void f_if(char *); 79 static void f_obs(char *); 80 static void f_of(char *); 81 static void f_seek(char *); 82 static void f_skip(char *); 83 static void f_progress(char *); 84 85 static const struct arg { 86 const char *name; 87 void (*f)(char *); 88 u_int set, noset; 89 } args[] = { 90 /* the array needs to be sorted by the first column so 91 bsearch() can be used to find commands quickly */ 92 { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC }, 93 { "cbs", f_cbs, C_CBS, C_CBS }, 94 { "conv", f_conv, 0, 0 }, 95 { "count", f_count, C_COUNT, C_COUNT }, 96 { "files", f_files, C_FILES, C_FILES }, 97 { "ibs", f_ibs, C_IBS, C_BS|C_IBS }, 98 { "if", f_if, C_IF, C_IF }, 99 { "iseek", f_skip, C_SKIP, C_SKIP }, 100 { "msgfmt", f_msgfmt, 0, 0 }, 101 { "obs", f_obs, C_OBS, C_BS|C_OBS }, 102 { "of", f_of, C_OF, C_OF }, 103 { "oseek", f_seek, C_SEEK, C_SEEK }, 104 { "progress", f_progress, 0, 0 }, 105 { "seek", f_seek, C_SEEK, C_SEEK }, 106 { "skip", f_skip, C_SKIP, C_SKIP }, 107 }; 108 109 /* 110 * args -- parse JCL syntax of dd. 111 */ 112 void 113 jcl(char **argv) 114 { 115 struct arg *ap, tmp; 116 char *oper, *arg; 117 118 in.dbsz = out.dbsz = 512; 119 120 while ((oper = *++argv) != NULL) { 121 if ((oper = strdup(oper)) == NULL) { 122 errx(EXIT_FAILURE, 123 "unable to allocate space for the argument %s", 124 *argv); 125 /* NOTREACHED */ 126 } 127 if ((arg = strchr(oper, '=')) == NULL) { 128 errx(EXIT_FAILURE, "unknown operand %s", oper); 129 /* NOTREACHED */ 130 } 131 *arg++ = '\0'; 132 if (!*arg) { 133 errx(EXIT_FAILURE, "no value specified for %s", oper); 134 /* NOTREACHED */ 135 } 136 tmp.name = oper; 137 if (!(ap = bsearch(&tmp, args, 138 __arraycount(args), sizeof(*args), c_arg))) { 139 errx(EXIT_FAILURE, "unknown operand %s", tmp.name); 140 /* NOTREACHED */ 141 } 142 if (ddflags & ap->noset) { 143 errx(EXIT_FAILURE, 144 "%s: illegal argument combination or already set", 145 tmp.name); 146 /* NOTREACHED */ 147 } 148 ddflags |= ap->set; 149 ap->f(arg); 150 } 151 152 /* Final sanity checks. */ 153 154 if (ddflags & C_BS) { 155 /* 156 * Bs is turned off by any conversion -- we assume the user 157 * just wanted to set both the input and output block sizes 158 * and didn't want the bs semantics, so we don't warn. 159 */ 160 if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE | 161 C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) { 162 ddflags &= ~C_BS; 163 ddflags |= C_IBS|C_OBS; 164 } 165 166 /* Bs supersedes ibs and obs. */ 167 if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) 168 warnx("bs supersedes ibs and obs"); 169 } 170 171 /* 172 * Ascii/ebcdic and cbs implies block/unblock. 173 * Block/unblock requires cbs and vice-versa. 174 */ 175 if (ddflags & (C_BLOCK|C_UNBLOCK)) { 176 if (!(ddflags & C_CBS)) { 177 errx(EXIT_FAILURE, "record operations require cbs"); 178 /* NOTREACHED */ 179 } 180 cfunc = ddflags & C_BLOCK ? block : unblock; 181 } else if (ddflags & C_CBS) { 182 if (ddflags & (C_ASCII|C_EBCDIC)) { 183 if (ddflags & C_ASCII) { 184 ddflags |= C_UNBLOCK; 185 cfunc = unblock; 186 } else { 187 ddflags |= C_BLOCK; 188 cfunc = block; 189 } 190 } else { 191 errx(EXIT_FAILURE, 192 "cbs meaningless if not doing record operations"); 193 /* NOTREACHED */ 194 } 195 } else 196 cfunc = def; 197 198 /* Read, write and seek calls take off_t as arguments. 199 * 200 * The following check is not done because an off_t is a quad 201 * for current NetBSD implementations. 202 * 203 * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz) 204 * errx(1, "seek offsets cannot be larger than %d", INT_MAX); 205 */ 206 } 207 208 static int 209 c_arg(const void *a, const void *b) 210 { 211 212 return (strcmp(((const struct arg *)a)->name, 213 ((const struct arg *)b)->name)); 214 } 215 216 static void 217 f_bs(char *arg) 218 { 219 220 in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX); 221 } 222 223 static void 224 f_cbs(char *arg) 225 { 226 227 cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX); 228 } 229 230 static void 231 f_count(char *arg) 232 { 233 234 cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX); 235 if (!cpy_cnt) 236 terminate(0); 237 } 238 239 static void 240 f_files(char *arg) 241 { 242 243 files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX); 244 if (!files_cnt) 245 terminate(0); 246 } 247 248 static void 249 f_ibs(char *arg) 250 { 251 252 if (!(ddflags & C_BS)) 253 in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX); 254 } 255 256 static void 257 f_if(char *arg) 258 { 259 260 in.name = arg; 261 } 262 263 #ifdef NO_MSGFMT 264 /* Build a small version (i.e. for a ramdisk root) */ 265 static void 266 f_msgfmt(char *arg) 267 { 268 269 errx(EXIT_FAILURE, "msgfmt option disabled"); 270 /* NOTREACHED */ 271 } 272 #else /* NO_MSGFMT */ 273 static void 274 f_msgfmt(char *arg) 275 { 276 277 /* 278 * If the format string is not valid, dd_write_msg() will print 279 * an error and exit. 280 */ 281 dd_write_msg(arg, 0); 282 283 msgfmt = arg; 284 } 285 #endif /* NO_MSGFMT */ 286 287 static void 288 f_obs(char *arg) 289 { 290 291 if (!(ddflags & C_BS)) 292 out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX); 293 } 294 295 static void 296 f_of(char *arg) 297 { 298 299 out.name = arg; 300 } 301 302 static void 303 f_seek(char *arg) 304 { 305 306 out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX); 307 } 308 309 static void 310 f_skip(char *arg) 311 { 312 313 in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX); 314 } 315 316 static void 317 f_progress(char *arg) 318 { 319 320 progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX); 321 } 322 323 #ifdef NO_CONV 324 /* Build a small version (i.e. for a ramdisk root) */ 325 static void 326 f_conv(char *arg) 327 { 328 329 errx(EXIT_FAILURE, "conv option disabled"); 330 /* NOTREACHED */ 331 } 332 #else /* NO_CONV */ 333 334 static const struct conv { 335 const char *name; 336 u_int set, noset; 337 const u_char *ctab; 338 } clist[] = { 339 { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, 340 { "block", C_BLOCK, C_UNBLOCK, NULL }, 341 { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, 342 { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, 343 { "lcase", C_LCASE, C_UCASE, NULL }, 344 { "noerror", C_NOERROR, 0, NULL }, 345 { "notrunc", C_NOTRUNC, 0, NULL }, 346 { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, 347 { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, 348 { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V }, 349 { "osync", C_OSYNC, C_BS, NULL }, 350 { "sparse", C_SPARSE, 0, NULL }, 351 { "swab", C_SWAB, 0, NULL }, 352 { "sync", C_SYNC, 0, NULL }, 353 { "ucase", C_UCASE, C_LCASE, NULL }, 354 { "unblock", C_UNBLOCK, C_BLOCK, NULL }, 355 /* If you add items to this table, be sure to add the 356 * conversions to the C_BS check in the jcl routine above. 357 */ 358 }; 359 360 static void 361 f_conv(char *arg) 362 { 363 struct conv *cp, tmp; 364 365 while (arg != NULL) { 366 tmp.name = strsep(&arg, ","); 367 if (!(cp = bsearch(&tmp, clist, 368 __arraycount(clist), sizeof(*clist), c_conv))) { 369 errx(EXIT_FAILURE, "unknown conversion %s", tmp.name); 370 /* NOTREACHED */ 371 } 372 if (ddflags & cp->noset) { 373 errx(EXIT_FAILURE, 374 "%s: illegal conversion combination", tmp.name); 375 /* NOTREACHED */ 376 } 377 ddflags |= cp->set; 378 if (cp->ctab) 379 ctab = cp->ctab; 380 } 381 } 382 383 static int 384 c_conv(const void *a, const void *b) 385 { 386 387 return (strcmp(((const struct conv *)a)->name, 388 ((const struct conv *)b)->name)); 389 } 390 391 #endif /* NO_CONV */ 392