| 1 | /* dd - disk dumper */
|
|---|
| 2 |
|
|---|
| 3 | #include <sys/types.h>
|
|---|
| 4 | #include <sys/stat.h>
|
|---|
| 5 | #include <signal.h>
|
|---|
| 6 | #include <fcntl.h>
|
|---|
| 7 | #include <unistd.h>
|
|---|
| 8 | #include <stdlib.h>
|
|---|
| 9 | #include <unistd.h>
|
|---|
| 10 | #include <stdio.h>
|
|---|
| 11 | #include <string.h>
|
|---|
| 12 | #include <errno.h>
|
|---|
| 13 |
|
|---|
| 14 | #define EOS '\0'
|
|---|
| 15 | #define BOOLEAN int
|
|---|
| 16 | #define TRUE 1
|
|---|
| 17 | #define FALSE 0
|
|---|
| 18 |
|
|---|
| 19 | char *pch, *errorp;
|
|---|
| 20 |
|
|---|
| 21 | _PROTOTYPE(int main, (int argc, char **argv));
|
|---|
| 22 | _PROTOTYPE(BOOLEAN is, (char *pc));
|
|---|
| 23 | _PROTOTYPE(int num, (void));
|
|---|
| 24 | _PROTOTYPE(void puto, (void));
|
|---|
| 25 | _PROTOTYPE(void statistics, (void));
|
|---|
| 26 | _PROTOTYPE(int ulcase, (int c));
|
|---|
| 27 | _PROTOTYPE(void cnull, (int c));
|
|---|
| 28 | _PROTOTYPE(void null, (int c));
|
|---|
| 29 | _PROTOTYPE(void extra, (void));
|
|---|
| 30 | _PROTOTYPE(void over, (int dummy));
|
|---|
| 31 |
|
|---|
| 32 | BOOLEAN is(pc)
|
|---|
| 33 | char *pc;
|
|---|
| 34 | {
|
|---|
| 35 | register char *ps = pch;
|
|---|
| 36 |
|
|---|
| 37 | while (*ps++ == *pc++)
|
|---|
| 38 | if (*pc == EOS) {
|
|---|
| 39 | pch = ps;
|
|---|
| 40 | return(TRUE);
|
|---|
| 41 | }
|
|---|
| 42 | return(FALSE);
|
|---|
| 43 | }
|
|---|
| 44 |
|
|---|
| 45 | #define BIGNUM 2147483647
|
|---|
| 46 |
|
|---|
| 47 | int num()
|
|---|
| 48 | {
|
|---|
| 49 | long ans;
|
|---|
| 50 | register char *pc;
|
|---|
| 51 |
|
|---|
| 52 | pc = pch;
|
|---|
| 53 | ans = 0L;
|
|---|
| 54 | while ((*pc >= '0') && (*pc <= '9'))
|
|---|
| 55 | ans = (long) ((*pc++ - '0') + (ans * 10));
|
|---|
| 56 | while (TRUE) switch (*pc++) {
|
|---|
| 57 | case 'w':
|
|---|
| 58 | ans *= 2L;
|
|---|
| 59 | continue;
|
|---|
| 60 | case 'b':
|
|---|
| 61 | ans *= 512L;
|
|---|
| 62 | continue;
|
|---|
| 63 | case 'k':
|
|---|
| 64 | ans *= 1024L;
|
|---|
| 65 | continue;
|
|---|
| 66 | case 'x':
|
|---|
| 67 | pch = pc;
|
|---|
| 68 | ans *= (long) num();
|
|---|
| 69 | case EOS:
|
|---|
| 70 | if ((ans >= BIGNUM) || (ans < 0)) {
|
|---|
| 71 | fprintf(stderr, "dd: argument %s out of range\n",
|
|---|
| 72 | errorp);
|
|---|
| 73 | exit(1);
|
|---|
| 74 | }
|
|---|
| 75 | return((int) ans);
|
|---|
| 76 | }
|
|---|
| 77 | }
|
|---|
| 78 |
|
|---|
| 79 | #define SWAB 0x0001
|
|---|
| 80 | #define LCASE 0x0002
|
|---|
| 81 | #define UCASE 0x0004
|
|---|
| 82 | #define NOERROR 0x0008
|
|---|
| 83 | #define SYNC 0x0010
|
|---|
| 84 | #define SILENT 0x0020
|
|---|
| 85 | #define BLANK ' '
|
|---|
| 86 | #define DEFAULT 512
|
|---|
| 87 |
|
|---|
| 88 | unsigned cbs, bs, skip, nseek, count;
|
|---|
| 89 | int seekseen = FALSE;
|
|---|
| 90 | unsigned ibs = DEFAULT;
|
|---|
| 91 | unsigned obs = DEFAULT;
|
|---|
| 92 | unsigned files = 1;
|
|---|
| 93 | char *ifilename = NULL;
|
|---|
| 94 | char *ofilename = NULL;
|
|---|
| 95 |
|
|---|
| 96 | int convflag = 0;
|
|---|
| 97 | int flag = 0;
|
|---|
| 98 | int ifd, ofd, ibc;
|
|---|
| 99 | char *ibuf, *obuf, *op;
|
|---|
| 100 | unsigned nifull, nipartial, nofull, nopartial;
|
|---|
| 101 | int cbc;
|
|---|
| 102 | unsigned ntr, obc;
|
|---|
| 103 | int ns;
|
|---|
| 104 | char mlen[] = {64, 45, 82, 45, 83, 96, 109, 100, 109, 97, 96, 116, 108, 9};
|
|---|
| 105 |
|
|---|
| 106 | void puto()
|
|---|
| 107 | {
|
|---|
| 108 | int n;
|
|---|
| 109 |
|
|---|
| 110 | if (obc == 0) return;
|
|---|
| 111 | if (obc == obs)
|
|---|
| 112 | nofull++;
|
|---|
| 113 | else
|
|---|
| 114 | nopartial++;
|
|---|
| 115 | if ((n = write(ofd, obuf, obc)) != obc) {
|
|---|
| 116 | if (n == -1) {
|
|---|
| 117 | fprintf(stderr, "dd: Write error: %s\n", strerror(errno));
|
|---|
| 118 | } else {
|
|---|
| 119 | fprintf(stderr, "dd: Short write, %d instead of %d\n", n, obc);
|
|---|
| 120 | }
|
|---|
| 121 | exit(1);
|
|---|
| 122 | }
|
|---|
| 123 | obc = 0;
|
|---|
| 124 | }
|
|---|
| 125 |
|
|---|
| 126 | void statistics()
|
|---|
| 127 | {
|
|---|
| 128 | if (convflag & SILENT) return;
|
|---|
| 129 | fprintf(stderr, "%u+%u records in\n", nifull, nipartial);
|
|---|
| 130 | fprintf(stderr, "%u+%u records out\n", nofull, nopartial);
|
|---|
| 131 | if (ntr) fprintf(stderr, "%d truncated records\n", ntr);
|
|---|
| 132 | }
|
|---|
| 133 |
|
|---|
| 134 |
|
|---|
| 135 | int main(argc, argv)
|
|---|
| 136 | int argc;
|
|---|
| 137 | char *argv[];
|
|---|
| 138 | {
|
|---|
| 139 | #ifdef __STDC__
|
|---|
| 140 | void (*convert) (int);
|
|---|
| 141 | #else
|
|---|
| 142 | void (*convert) ();
|
|---|
| 143 | #endif
|
|---|
| 144 | char *iptr;
|
|---|
| 145 | int i, j;
|
|---|
| 146 |
|
|---|
| 147 | convert = null;
|
|---|
| 148 | argc--;
|
|---|
| 149 | argv++;
|
|---|
| 150 | while (argc-- > 0) {
|
|---|
| 151 | pch = *(argv++);
|
|---|
| 152 | if (is("ibs=")) {
|
|---|
| 153 | errorp = pch;
|
|---|
| 154 | ibs = num();
|
|---|
| 155 | continue;
|
|---|
| 156 | }
|
|---|
| 157 | if (is("obs=")) {
|
|---|
| 158 | errorp = pch;
|
|---|
| 159 | obs = num();
|
|---|
| 160 | continue;
|
|---|
| 161 | }
|
|---|
| 162 | if (is("bs=")) {
|
|---|
| 163 | errorp = pch;
|
|---|
| 164 | bs = num();
|
|---|
| 165 | continue;
|
|---|
| 166 | }
|
|---|
| 167 | if (is("if=")) {
|
|---|
| 168 | ifilename = pch;
|
|---|
| 169 | continue;
|
|---|
| 170 | }
|
|---|
| 171 | if (is("of=")) {
|
|---|
| 172 | ofilename = pch;
|
|---|
| 173 | continue;
|
|---|
| 174 | }
|
|---|
| 175 | if (is("skip=")) {
|
|---|
| 176 | errorp = pch;
|
|---|
| 177 | skip = num();
|
|---|
| 178 | continue;
|
|---|
| 179 | }
|
|---|
| 180 | if (is("seek=")) {
|
|---|
| 181 | errorp = pch;
|
|---|
| 182 | nseek = num();
|
|---|
| 183 | seekseen = TRUE;
|
|---|
| 184 | continue;
|
|---|
| 185 | }
|
|---|
| 186 | if (is("count=")) {
|
|---|
| 187 | errorp = pch;
|
|---|
| 188 | count = num();
|
|---|
| 189 | continue;
|
|---|
| 190 | }
|
|---|
| 191 | if (is("files=")) {
|
|---|
| 192 | errorp = pch;
|
|---|
| 193 | files = num();
|
|---|
| 194 | continue;
|
|---|
| 195 | }
|
|---|
| 196 | if (is("length=")) {
|
|---|
| 197 | errorp = pch;
|
|---|
| 198 | for (j = 0; j < 13; j++) mlen[j]++;
|
|---|
| 199 | write(2, mlen, 14);
|
|---|
| 200 | continue;
|
|---|
| 201 | }
|
|---|
| 202 | if (is("conv=")) {
|
|---|
| 203 | while (*pch != EOS) {
|
|---|
| 204 | if (is("lcase")) {
|
|---|
| 205 | convflag |= LCASE;
|
|---|
| 206 | continue;
|
|---|
| 207 | }
|
|---|
| 208 | if (is("ucase")) {
|
|---|
| 209 | convflag |= UCASE;
|
|---|
| 210 | continue;
|
|---|
| 211 | }
|
|---|
| 212 | if (is("noerror")) {
|
|---|
| 213 | convflag |= NOERROR;
|
|---|
| 214 | continue;
|
|---|
| 215 | }
|
|---|
| 216 | if (is("sync")) {
|
|---|
| 217 | convflag |= SYNC;
|
|---|
| 218 | continue;
|
|---|
| 219 | }
|
|---|
| 220 | if (is("swab")) {
|
|---|
| 221 | convflag |= SWAB;
|
|---|
| 222 | continue;
|
|---|
| 223 | }
|
|---|
| 224 | if (is("silent")) {
|
|---|
| 225 | convflag |= SILENT;
|
|---|
| 226 | continue;
|
|---|
| 227 | }
|
|---|
| 228 | if (is(",")) continue;
|
|---|
| 229 | fprintf(stderr, "dd: bad argument: %s\n",
|
|---|
| 230 | pch);
|
|---|
| 231 | exit(1);
|
|---|
| 232 | }
|
|---|
| 233 | if (*pch == EOS) continue;
|
|---|
| 234 | }
|
|---|
| 235 | fprintf(stderr, "dd: bad argument: %s\n", pch);
|
|---|
| 236 | exit(1);
|
|---|
| 237 | }
|
|---|
| 238 | if ((convert == null) && (convflag & (UCASE | LCASE))) convert = cnull;
|
|---|
| 239 | if ((ifd = ((ifilename) ? open(ifilename, O_RDONLY) : dup(0))) < 0) {
|
|---|
| 240 | fprintf(stderr, "dd: Can't open %s: %s\n",
|
|---|
| 241 | (ifilename) ? ifilename : "stdin", strerror(errno));
|
|---|
| 242 | exit(1);
|
|---|
| 243 | }
|
|---|
| 244 | if ((ofd = ((ofilename) ? open(ofilename, seekseen ? O_WRONLY | O_CREAT
|
|---|
| 245 | : O_WRONLY | O_CREAT | O_TRUNC, 0666)
|
|---|
| 246 | : dup(1))) < 0) {
|
|---|
| 247 | fprintf(stderr, "dd: Can't open %s: %s\n",
|
|---|
| 248 | (ofilename) ? ofilename : "stdout", strerror(errno));
|
|---|
| 249 | exit(1);
|
|---|
| 250 | }
|
|---|
| 251 | if (bs) {
|
|---|
| 252 | ibs = obs = bs;
|
|---|
| 253 | if (convert == null) flag++;
|
|---|
| 254 | }
|
|---|
| 255 | if (ibs == 0) {
|
|---|
| 256 | fprintf(stderr, "dd: ibs cannot be zero\n");
|
|---|
| 257 | exit(1);
|
|---|
| 258 | }
|
|---|
| 259 | if (obs == 0) {
|
|---|
| 260 | fprintf(stderr, "dd: obs cannot be zero\n");
|
|---|
| 261 | exit(1);
|
|---|
| 262 | }
|
|---|
| 263 | if ((ibuf = sbrk(ibs)) == (char *) -1) {
|
|---|
| 264 | fprintf(stderr, "dd: not enough memory\n");
|
|---|
| 265 | exit(1);
|
|---|
| 266 | }
|
|---|
| 267 | if ((obuf = (flag) ? ibuf : sbrk(obs)) == (char *) -1) {
|
|---|
| 268 | fprintf(stderr, "dd: not enough memory\n");
|
|---|
| 269 | exit(1);
|
|---|
| 270 | }
|
|---|
| 271 | ibc = obc = cbc = 0;
|
|---|
| 272 | op = obuf;
|
|---|
| 273 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) signal(SIGINT, over);
|
|---|
| 274 | if (skip != 0) {
|
|---|
| 275 | struct stat st;
|
|---|
| 276 | if (fstat(ifd,&st) < 0 || !(S_ISREG(st.st_mode) || S_ISBLK(st.st_mode))
|
|---|
| 277 | || lseek(ifd, (off_t) ibs * (off_t) skip, SEEK_SET) == (off_t) -1) {
|
|---|
| 278 | do {
|
|---|
| 279 | if (read(ifd, ibuf, ibs) == -1) {
|
|---|
| 280 | fprintf(stderr,
|
|---|
| 281 | "dd: Error skipping input: %s\n",
|
|---|
| 282 | strerror(errno));
|
|---|
| 283 | exit(1);
|
|---|
| 284 | }
|
|---|
| 285 | } while (--skip != 0);
|
|---|
| 286 | }
|
|---|
| 287 | }
|
|---|
| 288 | if (nseek != 0) {
|
|---|
| 289 | if (lseek(ofd, (off_t) obs * (off_t) nseek, SEEK_SET) == (off_t) -1) {
|
|---|
| 290 | fprintf(stderr, "dd: Seeking on output failed: %s\n",
|
|---|
| 291 | strerror(errno));
|
|---|
| 292 | exit(1);
|
|---|
| 293 | }
|
|---|
| 294 | }
|
|---|
| 295 |
|
|---|
| 296 | outputall:
|
|---|
| 297 | if (ibc-- == 0) {
|
|---|
| 298 | ibc = 0;
|
|---|
| 299 | if ((count == 0) || ((nifull + nipartial) != count)) {
|
|---|
| 300 | if (convflag & (NOERROR | SYNC))
|
|---|
| 301 | for (iptr = ibuf + ibs; iptr > ibuf;) *--iptr = 0;
|
|---|
| 302 | ibc = read(ifd, ibuf, ibs);
|
|---|
| 303 | }
|
|---|
| 304 | if (ibc == -1) {
|
|---|
| 305 | fprintf(stderr, "dd: Read error: %s\n", strerror(errno));
|
|---|
| 306 | if ((convflag & NOERROR) == 0) {
|
|---|
| 307 | puto();
|
|---|
| 308 | over(0);
|
|---|
| 309 | }
|
|---|
| 310 | ibc = 0;
|
|---|
| 311 | for (i = 0; i < ibs; i++)
|
|---|
| 312 | if (ibuf[i] != 0) ibc = i;
|
|---|
| 313 | statistics();
|
|---|
| 314 | }
|
|---|
| 315 | if ((ibc == 0) && (--files <= 0)) {
|
|---|
| 316 | puto();
|
|---|
| 317 | over(0);
|
|---|
| 318 | }
|
|---|
| 319 | if (ibc != ibs) {
|
|---|
| 320 | nipartial++;
|
|---|
| 321 | if (convflag & SYNC) ibc = ibs;
|
|---|
| 322 | } else
|
|---|
| 323 | nifull++;
|
|---|
| 324 | iptr = ibuf;
|
|---|
| 325 | i = ibc >> 1;
|
|---|
| 326 | if ((convflag & SWAB) && i) do {
|
|---|
| 327 | int temp;
|
|---|
| 328 | temp = *iptr++;
|
|---|
| 329 | iptr[-1] = *iptr;
|
|---|
| 330 | *iptr++ = temp;
|
|---|
| 331 | } while (--i);
|
|---|
| 332 | iptr = ibuf;
|
|---|
| 333 | if (flag) {
|
|---|
| 334 | obc = ibc;
|
|---|
| 335 | puto();
|
|---|
| 336 | ibc = 0;
|
|---|
| 337 | }
|
|---|
| 338 | goto outputall;
|
|---|
| 339 | }
|
|---|
| 340 | i = *iptr++ & 0377;
|
|---|
| 341 | (*convert) (i);
|
|---|
| 342 | goto outputall;
|
|---|
| 343 | }
|
|---|
| 344 |
|
|---|
| 345 | int ulcase(c)
|
|---|
| 346 | int c;
|
|---|
| 347 | {
|
|---|
| 348 | int ans = c;
|
|---|
| 349 |
|
|---|
| 350 | if ((convflag & UCASE) && (c >= 'a') &&
|
|---|
| 351 | (c <= 'z'))
|
|---|
| 352 | ans += 'A' - 'a';
|
|---|
| 353 | if ((convflag & LCASE) && (c >= 'A') &&
|
|---|
| 354 | (c <= 'Z'))
|
|---|
| 355 | ans += 'a' - 'A';
|
|---|
| 356 | return(ans);
|
|---|
| 357 | }
|
|---|
| 358 |
|
|---|
| 359 | void cnull(c)
|
|---|
| 360 | int c;
|
|---|
| 361 | {
|
|---|
| 362 | c = ulcase(c);
|
|---|
| 363 | null(c);
|
|---|
| 364 | }
|
|---|
| 365 |
|
|---|
| 366 | void null(c)
|
|---|
| 367 | int c;
|
|---|
| 368 | {
|
|---|
| 369 | *op++ = c;
|
|---|
| 370 | if (++obc >= obs) {
|
|---|
| 371 | puto();
|
|---|
| 372 | op = obuf;
|
|---|
| 373 | }
|
|---|
| 374 | }
|
|---|
| 375 |
|
|---|
| 376 | void extra()
|
|---|
| 377 | {
|
|---|
| 378 | if (++cbc >= cbs) {
|
|---|
| 379 | null('\n');
|
|---|
| 380 | cbc = 0;
|
|---|
| 381 | ns = 0;
|
|---|
| 382 | }
|
|---|
| 383 | }
|
|---|
| 384 |
|
|---|
| 385 | void over(sig)
|
|---|
| 386 | int sig;
|
|---|
| 387 | {
|
|---|
| 388 | statistics();
|
|---|
| 389 | if (sig != 0) {
|
|---|
| 390 | signal(sig, SIG_DFL);
|
|---|
| 391 | raise(sig);
|
|---|
| 392 | }
|
|---|
| 393 | exit(0);
|
|---|
| 394 | }
|
|---|
