1 /* $NetBSD: args.c,v 1.34 2011/02/04 19:42:12 pooka 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 1.34 2011/02/04 19:42:12 pooka 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 #ifndef NO_CONV 60 static int c_conv(const void *, const void *); 61 #endif 62 static void f_bs(char *); 63 static void f_cbs(char *); 64 static void f_conv(char *); 65 static void f_count(char *); 66 static void f_files(char *); 67 static void f_ibs(char *); 68 static void f_if(char *); 69 static void f_obs(char *); 70 static void f_of(char *); 71 static void f_seek(char *); 72 static void f_skip(char *); 73 static void f_progress(char *); 74 75 static const struct arg { 76 const char *name; 77 void (*f)(char *); 78 u_int set, noset; 79 } args[] = { 80 /* the array needs to be sorted by the first column so 81 bsearch() can be used to find commands quickly */ 82 { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC }, 83 { "cbs", f_cbs, C_CBS, C_CBS }, 84 { "conv", f_conv, 0, 0 }, 85 { "count", f_count, C_COUNT, C_COUNT }, 86 { "files", f_files, C_FILES, C_FILES }, 87 { "ibs", f_ibs, C_IBS, C_BS|C_IBS }, 88 { "if", f_if, C_IF, C_IF }, 89 { "iseek", f_skip, C_SKIP, C_SKIP }, 90 { "obs", f_obs, C_OBS, C_BS|C_OBS }, 91 { "of", f_of, C_OF, C_OF }, 92 { "oseek", f_seek, C_SEEK, C_SEEK }, 93 { "progress", f_progress, 0, 0 }, 94 { "seek", f_seek, C_SEEK, C_SEEK }, 95 { "skip", f_skip, C_SKIP, C_SKIP }, 96 }; 97 98 /* 99 * args -- parse JCL syntax of dd. 100 */ 101 void 102 jcl(char **argv) 103 { 104 struct arg *ap, tmp; 105 char *oper, *arg; 106 107 in.dbsz = out.dbsz = 512; 108 109 while ((oper = *++argv) != NULL) { 110 if ((oper = strdup(oper)) == NULL) { 111 errx(EXIT_FAILURE, 112 "unable to allocate space for the argument %s", 113 *argv); 114 /* NOTREACHED */ 115 } 116 if ((arg = strchr(oper, '=')) == NULL) { 117 errx(EXIT_FAILURE, "unknown operand %s", oper); 118 /* NOTREACHED */ 119 } 120 *arg++ = '\0'; 121 if (!*arg) { 122 errx(EXIT_FAILURE, "no value specified for %s", oper); 123 /* NOTREACHED */ 124 } 125 tmp.name = oper; 126 if (!(ap = bsearch(&tmp, args, 127 __arraycount(args), sizeof(*args), c_arg))) { 128 errx(EXIT_FAILURE, "unknown operand %s", tmp.name); 129 /* NOTREACHED */ 130 } 131 if (ddflags & ap->noset) { 132 errx(EXIT_FAILURE, 133 "%s: illegal argument combination or already set", 134 tmp.name); 135 /* NOTREACHED */ 136 } 137 ddflags |= ap->set; 138 ap->f(arg); 139 } 140 141 /* Final sanity checks. */ 142 143 if (ddflags & C_BS) { 144 /* 145 * Bs is turned off by any conversion -- we assume the user 146 * just wanted to set both the input and output block sizes 147 * and didn't want the bs semantics, so we don't warn. 148 */ 149 if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE | 150 C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) { 151 ddflags &= ~C_BS; 152 ddflags |= C_IBS|C_OBS; 153 } 154 155 /* Bs supersedes ibs and obs. */ 156 if (ddflags & C_BS && ddflags & (C_IBS|C_OBS)) 157 warnx("bs supersedes ibs and obs"); 158 } 159 160 /* 161 * Ascii/ebcdic and cbs implies block/unblock. 162 * Block/unblock requires cbs and vice-versa. 163 */ 164 if (ddflags & (C_BLOCK|C_UNBLOCK)) { 165 if (!(ddflags & C_CBS)) { 166 errx(EXIT_FAILURE, "record operations require cbs"); 167 /* NOTREACHED */ 168 } 169 cfunc = ddflags & C_BLOCK ? block : unblock; 170 } else if (ddflags & C_CBS) { 171 if (ddflags & (C_ASCII|C_EBCDIC)) { 172 if (ddflags & C_ASCII) { 173 ddflags |= C_UNBLOCK; 174 cfunc = unblock; 175 } else { 176 ddflags |= C_BLOCK; 177 cfunc = block; 178 } 179 } else { 180 errx(EXIT_FAILURE, 181 "cbs meaningless if not doing record operations"); 182 /* NOTREACHED */ 183 } 184 } else 185 cfunc = def; 186 187 /* Read, write and seek calls take off_t as arguments. 188 * 189 * The following check is not done because an off_t is a quad 190 * for current NetBSD implementations. 191 * 192 * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz) 193 * errx(1, "seek offsets cannot be larger than %d", INT_MAX); 194 */ 195 } 196 197 static int 198 c_arg(const void *a, const void *b) 199 { 200 201 return (strcmp(((const struct arg *)a)->name, 202 ((const struct arg *)b)->name)); 203 } 204 205 static void 206 f_bs(char *arg) 207 { 208 209 in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX); 210 } 211 212 static void 213 f_cbs(char *arg) 214 { 215 216 cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX); 217 } 218 219 static void 220 f_count(char *arg) 221 { 222 223 cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX); 224 if (!cpy_cnt) 225 terminate(0); 226 } 227 228 static void 229 f_files(char *arg) 230 { 231 232 files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX); 233 if (!files_cnt) 234 terminate(0); 235 } 236 237 static void 238 f_ibs(char *arg) 239 { 240 241 if (!(ddflags & C_BS)) 242 in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX); 243 } 244 245 static void 246 f_if(char *arg) 247 { 248 249 in.name = arg; 250 } 251 252 static void 253 f_obs(char *arg) 254 { 255 256 if (!(ddflags & C_BS)) 257 out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX); 258 } 259 260 static void 261 f_of(char *arg) 262 { 263 264 out.name = arg; 265 } 266 267 static void 268 f_seek(char *arg) 269 { 270 271 out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX); 272 } 273 274 static void 275 f_skip(char *arg) 276 { 277 278 in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX); 279 } 280 281 static void 282 f_progress(char *arg) 283 { 284 285 progress = strsuftoll("progress blocks", arg, 0, LLONG_MAX); 286 } 287 288 #ifdef NO_CONV 289 /* Build a small version (i.e. for a ramdisk root) */ 290 static void 291 f_conv(char *arg) 292 { 293 294 errx(EXIT_FAILURE, "conv option disabled"); 295 /* NOTREACHED */ 296 } 297 #else /* NO_CONV */ 298 299 static const struct conv { 300 const char *name; 301 u_int set, noset; 302 const u_char *ctab; 303 } clist[] = { 304 { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX }, 305 { "block", C_BLOCK, C_UNBLOCK, NULL }, 306 { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX }, 307 { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX }, 308 { "lcase", C_LCASE, C_UCASE, NULL }, 309 { "noerror", C_NOERROR, 0, NULL }, 310 { "notrunc", C_NOTRUNC, 0, NULL }, 311 { "oldascii", C_ASCII, C_EBCDIC, e2a_32V }, 312 { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V }, 313 { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V }, 314 { "osync", C_OSYNC, C_BS, NULL }, 315 { "sparse", C_SPARSE, 0, NULL }, 316 { "swab", C_SWAB, 0, NULL }, 317 { "sync", C_SYNC, 0, NULL }, 318 { "ucase", C_UCASE, C_LCASE, NULL }, 319 { "unblock", C_UNBLOCK, C_BLOCK, NULL }, 320 /* If you add items to this table, be sure to add the 321 * conversions to the C_BS check in the jcl routine above. 322 */ 323 }; 324 325 static void 326 f_conv(char *arg) 327 { 328 struct conv *cp, tmp; 329 330 while (arg != NULL) { 331 tmp.name = strsep(&arg, ","); 332 if (!(cp = bsearch(&tmp, clist, 333 __arraycount(clist), sizeof(*clist), c_conv))) { 334 errx(EXIT_FAILURE, "unknown conversion %s", tmp.name); 335 /* NOTREACHED */ 336 } 337 if (ddflags & cp->noset) { 338 errx(EXIT_FAILURE, 339 "%s: illegal conversion combination", tmp.name); 340 /* NOTREACHED */ 341 } 342 ddflags |= cp->set; 343 if (cp->ctab) 344 ctab = cp->ctab; 345 } 346 } 347 348 static int 349 c_conv(const void *a, const void *b) 350 { 351 352 return (strcmp(((const struct conv *)a)->name, 353 ((const struct conv *)b)->name)); 354 } 355 356 #endif /* NO_CONV */ 357