coreutils/dd.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini dd implementation for busybox
   4  *
   5  * Copyright (C) 2000,2001  Matt Kraai
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9 //config:config DD
  10 //config:       bool "dd (7.1 kb)"
  11 //config:       default y
  12 //config:       help
  13 //config:       dd copies a file (from standard input to standard output,
  14 //config:       by default) using specific input and output blocksizes,
  15 //config:       while optionally performing conversions on it.
  16 //config:
  17 //config:config FEATURE_DD_SIGNAL_HANDLING
  18 //config:       bool "Enable signal handling for status reporting"
  19 //config:       default y
  20 //config:       depends on DD
  21 //config:       help
  22 //config:       Sending a SIGUSR1 signal to a running 'dd' process makes it
  23 //config:       print to standard error the number of records read and written
  24 //config:       so far, then to resume copying.
  25 //config:
  26 //config:       $ dd if=/dev/zero of=/dev/null &
  27 //config:       $ pid=$!; kill -USR1 $pid; sleep 1; kill $pid
  28 //config:       10899206+0 records in
  29 //config:       10899206+0 records out
  30 //config:
  31 //config:config FEATURE_DD_THIRD_STATUS_LINE
  32 //config:       bool "Enable the third status line upon signal"
  33 //config:       default y
  34 //config:       depends on DD && FEATURE_DD_SIGNAL_HANDLING
  35 //config:       help
  36 //config:       Displays a coreutils-like third status line with transferred bytes,
  37 //config:       elapsed time and speed.
  38 //config:
  39 //config:config FEATURE_DD_IBS_OBS
  40 //config:       bool "Enable ibs, obs, iflag, oflag and conv options"
  41 //config:       default y
  42 //config:       depends on DD
  43 //config:       help
  44 //config:       Enable support for writing a certain number of bytes in and out,
  45 //config:       at a time, and performing conversions on the data stream.
  46 //config:
  47 //config:config FEATURE_DD_STATUS
  48 //config:       bool "Enable status display options"
  49 //config:       default y
  50 //config:       depends on DD
  51 //config:       help
  52 //config:       Enable support for status=noxfer/none option.
  53
  54 //applet:IF_DD(APPLET_NOEXEC(dd, dd, BB_DIR_BIN, BB_SUID_DROP, dd))
  55
  56 //kbuild:lib-$(CONFIG_DD) += dd.o
  57
  58 //usage:#define dd_trivial_usage
  59 //usage:       "[if=FILE] [of=FILE] " IF_FEATURE_DD_IBS_OBS("[ibs=N] [obs=N] ") "[bs=N] [count=N] [skip=N]\n"
  60 //usage:       "        [seek=N]" IF_FEATURE_DD_IBS_OBS(" [conv=notrunc|noerror|sync|fsync] [iflag=skip_bytes|fullblock] [oflag=seek_bytes]")
  61 //usage:#define dd_full_usage "\n\n"
  62 //usage:       "Copy a file with converting and formatting\n"
  63 //usage:     "\n        if=FILE         Read from FILE instead of stdin"
  64 //usage:     "\n        of=FILE         Write to FILE instead of stdout"
  65 //usage:     "\n        bs=N            Read and write N bytes at a time"
  66 //usage:        IF_FEATURE_DD_IBS_OBS(
  67 //usage:     "\n        ibs=N           Read N bytes at a time"
  68 //usage:        )
  69 //usage:        IF_FEATURE_DD_IBS_OBS(
  70 //usage:     "\n        obs=N           Write N bytes at a time"
  71 //usage:        )
  72 //usage:     "\n        count=N         Copy only N input blocks"
  73 //usage:     "\n        skip=N          Skip N input blocks"
  74 //usage:     "\n        seek=N          Skip N output blocks"
  75 //usage:        IF_FEATURE_DD_IBS_OBS(
  76 //usage:     "\n        conv=notrunc    Don't truncate output file"
  77 //usage:     "\n        conv=noerror    Continue after read errors"
  78 //usage:     "\n        conv=sync       Pad blocks with zeros"
  79 //usage:     "\n        conv=fsync      Physically write data out before finishing"
  80 //usage:     "\n        conv=swab       Swap every pair of bytes"
  81 //usage:     "\n        iflag=skip_bytes        skip=N is in bytes"
  82 //usage:     "\n        iflag=fullblock Read full blocks"
  83 //usage:     "\n        oflag=seek_bytes        seek=N is in bytes"
  84 //usage:        )
  85 //usage:        IF_FEATURE_DD_STATUS(
  86 //usage:     "\n        status=noxfer   Suppress rate output"
  87 //usage:     "\n        status=none     Suppress all output"
  88 //usage:        )
  89 //usage:     "\n"
  90 //usage:     "\nN may be suffixed by c (1), w (2), b (512), kB (1000), k (1024), MB, M, GB, G"
  91 //usage:
  92 //usage:#define dd_example_usage
  93 //usage:       "$ dd if=/dev/zero of=/dev/ram1 bs=1M count=4\n"
  94 //usage:       "4+0 records in\n"
  95 //usage:       "4+0 records out\n"
  96
  97 #include "libbb.h"
  98 #include "common_bufsiz.h"
  99
 100 /* This is a NOEXEC applet. Be very careful! */
 101
 102
 103 enum {
 104         ifd = STDIN_FILENO,
 105         ofd = STDOUT_FILENO,
 106 };
 107
 108 struct globals {
 109         off_t out_full, out_part, in_full, in_part;
 110 #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
 111         unsigned long long total_bytes;
 112         unsigned long long begin_time_us;
 113 #endif
 114         int flags;
 115 } FIX_ALIASING;
 116 #define G (*(struct globals*)bb_common_bufsiz1)
 117 #define INIT_G() do { \
 118         setup_common_bufsiz(); \
 119         /* we have to zero it out because of NOEXEC */ \
 120         memset(&G, 0, sizeof(G)); \
 121 } while (0)
 122
 123 enum {
 124         /* Must be in the same order as OP_conv_XXX! */
 125         /* (see "flags |= (1 << what)" below) */
 126         FLAG_NOTRUNC = (1 << 0) * ENABLE_FEATURE_DD_IBS_OBS,
 127         FLAG_SYNC    = (1 << 1) * ENABLE_FEATURE_DD_IBS_OBS,
 128         FLAG_NOERROR = (1 << 2) * ENABLE_FEATURE_DD_IBS_OBS,
 129         FLAG_FSYNC   = (1 << 3) * ENABLE_FEATURE_DD_IBS_OBS,
 130         FLAG_SWAB    = (1 << 4) * ENABLE_FEATURE_DD_IBS_OBS,
 131         /* end of conv flags */
 132         /* start of input flags */
 133         FLAG_IFLAG_SHIFT = 5,
 134         FLAG_SKIP_BYTES = (1 << 5) * ENABLE_FEATURE_DD_IBS_OBS,
 135         FLAG_FULLBLOCK = (1 << 6) * ENABLE_FEATURE_DD_IBS_OBS,
 136         /* end of input flags */
 137         /* start of output flags */
 138         FLAG_OFLAG_SHIFT = 7,
 139         FLAG_SEEK_BYTES = (1 << 7) * ENABLE_FEATURE_DD_IBS_OBS,
 140         /* end of output flags */
 141         FLAG_TWOBUFS = (1 << 8) * ENABLE_FEATURE_DD_IBS_OBS,
 142         FLAG_COUNT   = 1 << 9,
 143         FLAG_STATUS_NONE = 1 << 10,
 144         FLAG_STATUS_NOXFER = 1 << 11,
 145 };
 146
 147 static void dd_output_status(int UNUSED_PARAM cur_signal)
 148 {
 149 #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
 150         double seconds;
 151         unsigned long long bytes_sec;
 152         unsigned long long now_us = monotonic_us(); /* before fprintf */
 153 #endif
 154
 155         /* Deliberately using %u, not %d */
 156         fprintf(stderr, "%"OFF_FMT"u+%"OFF_FMT"u records in\n"
 157                         "%"OFF_FMT"u+%"OFF_FMT"u records out\n",
 158                         G.in_full, G.in_part,
 159                         G.out_full, G.out_part);
 160
 161 #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
 162 # if ENABLE_FEATURE_DD_STATUS
 163         if (G.flags & FLAG_STATUS_NOXFER) /* status=noxfer active? */
 164                 return;
 165         //TODO: should status=none make dd stop reacting to USR1 entirely?
 166         //So far we react to it (we print the stats),
 167         //status=none only suppresses final, non-USR1 generated status message.
 168 # endif
 169         fprintf(stderr, "%llu bytes (%sB) copied, ",
 170                         G.total_bytes,
 171                         /* show fractional digit, use suffixes */
 172                         make_human_readable_str(G.total_bytes, 1, 0)
 173         );
 174         /* Corner cases:
 175          * ./busybox dd </dev/null >/dev/null
 176          * ./busybox dd bs=1M count=2000 </dev/zero >/dev/null
 177          * (echo DONE) | ./busybox dd >/dev/null
 178          * (sleep 1; echo DONE) | ./busybox dd >/dev/null
 179          */
 180         seconds = (now_us - G.begin_time_us) / 1000000.0;
 181         bytes_sec = G.total_bytes / seconds;
 182         fprintf(stderr, "%f seconds, %sB/s\n",
 183                         seconds,
 184                         /* show fractional digit, use suffixes */
 185                         make_human_readable_str(bytes_sec, 1, 0)
 186         );
 187 #endif
 188 }
 189
 190 static ssize_t full_write_or_warn(const void *buf, size_t len,
 191         const char *const filename)
 192 {
 193         ssize_t n = full_write(ofd, buf, len);
 194         if (n < 0)
 195                 bb_perror_msg("writing '%s'", filename);
 196         return n;
 197 }
 198
 199 static bool write_and_stats(const void *buf, size_t len, size_t obs,
 200         const char *filename)
 201 {
 202         ssize_t n = full_write_or_warn(buf, len, filename);
 203         if (n < 0)
 204                 return 1;
 205 #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
 206         G.total_bytes += n;
 207 #endif
 208         if ((size_t)n == obs) {
 209                 G.out_full++;
 210                 return 0;
 211         }
 212         if ((size_t)n == len) {
 213                 G.out_part++;
 214                 return 0;
 215         }
 216         return 1;
 217 }
 218
 219 #if ENABLE_LFS
 220 # define XATOU_SFX xatoull_sfx
 221 #else
 222 # define XATOU_SFX xatoul_sfx
 223 #endif
 224
 225 #if ENABLE_FEATURE_DD_IBS_OBS
 226 static int parse_comma_flags(char *val, const char *words, const char *error_in)
 227 {
 228         int flags = 0;
 229         while (1) {
 230                 int n;
 231                 char *arg;
 232                 /* find ',', replace them with NUL so we can use val for
 233                  * index_in_strings() without copying.
 234                  * We rely on val being non-null, else strchr would fault.
 235                  */
 236                 arg = strchr(val, ',');
 237                 if (arg)
 238                         *arg = '\0';
 239                 n = index_in_strings(words, val);
 240                 if (n < 0)
 241                         bb_error_msg_and_die(bb_msg_invalid_arg_to, val, error_in);
 242                 flags |= (1 << n);
 243                 if (!arg) /* no ',' left, so this was the last specifier */
 244                         break;
 245                 *arg = ','; /* to preserve ps listing */
 246                 val = arg + 1; /* skip this keyword and ',' */
 247         }
 248         return flags;
 249 }
 250 #endif
 251
 252 int dd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 253 int dd_main(int argc UNUSED_PARAM, char **argv)
 254 {
 255         static const char keywords[] ALIGN1 =
 256                 "bs\0""count\0""seek\0""skip\0""if\0""of\0"IF_FEATURE_DD_STATUS("status\0")
 257 #if ENABLE_FEATURE_DD_IBS_OBS
 258                 "ibs\0""obs\0""conv\0""iflag\0""oflag\0"
 259 #endif
 260                 ;
 261 #if ENABLE_FEATURE_DD_IBS_OBS
 262         static const char conv_words[] ALIGN1 =
 263                 "notrunc\0""sync\0""noerror\0""fsync\0""swab\0";
 264         static const char iflag_words[] ALIGN1 =
 265                 "skip_bytes\0""fullblock\0";
 266         static const char oflag_words[] ALIGN1 =
 267                 "seek_bytes\0";
 268 #endif
 269 #if ENABLE_FEATURE_DD_STATUS
 270         static const char status_words[] ALIGN1 =
 271                 "none\0""noxfer\0";
 272 #endif
 273         enum {
 274                 OP_bs = 0,
 275                 OP_count,
 276                 OP_seek,
 277                 OP_skip,
 278                 OP_if,
 279                 OP_of,
 280                 IF_FEATURE_DD_STATUS(OP_status,)
 281 #if ENABLE_FEATURE_DD_IBS_OBS
 282                 OP_ibs,
 283                 OP_obs,
 284                 OP_conv,
 285                 OP_iflag,
 286                 OP_oflag,
 287                 /* Must be in the same order as FLAG_XXX! */
 288                 OP_conv_notrunc = 0,
 289                 OP_conv_sync,
 290                 OP_conv_noerror,
 291                 OP_conv_fsync,
 292                 OP_conv_swab,
 293         /* Unimplemented conv=XXX: */
 294         //nocreat       do not create the output file
 295         //excl          fail if the output file already exists
 296         //fdatasync     physically write output file data before finishing
 297         //lcase         change upper case to lower case
 298         //ucase         change lower case to upper case
 299         //block         pad newline-terminated records with spaces to cbs-size
 300         //unblock       replace trailing spaces in cbs-size records with newline
 301         //ascii         from EBCDIC to ASCII
 302         //ebcdic        from ASCII to EBCDIC
 303         //ibm           from ASCII to alternate EBCDIC
 304         /* Partially implemented: */
 305         //swab          swap every pair of input bytes: will abort on non-even reads
 306                 OP_iflag_skip_bytes,
 307                 OP_iflag_fullblock,
 308                 OP_oflag_seek_bytes,
 309 #endif
 310         };
 311         smallint exitcode = EXIT_FAILURE;
 312         int i;
 313         size_t ibs = 512;
 314         char *ibuf;
 315 #if ENABLE_FEATURE_DD_IBS_OBS
 316         size_t obs = 512;
 317         char *obuf;
 318 #else
 319 # define obs  ibs
 320 # define obuf ibuf
 321 #endif
 322         /* These are all zeroed at once! */
 323         struct {
 324                 size_t oc;
 325                 ssize_t prev_read_size; /* for detecting swab failure */
 326                 off_t count;
 327                 off_t seek, skip;
 328                 const char *infile, *outfile;
 329         } Z;
 330 #define oc      (Z.oc     )
 331 #define prev_read_size (Z.prev_read_size)
 332 #define count   (Z.count  )
 333 #define seek    (Z.seek   )
 334 #define skip    (Z.skip   )
 335 #define infile  (Z.infile )
 336 #define outfile (Z.outfile)
 337
 338         memset(&Z, 0, sizeof(Z));
 339         INIT_G();
 340         //fflush_all(); - is this needed because of NOEXEC?
 341
 342         for (i = 1; argv[i]; i++) {
 343                 int what;
 344                 char *val;
 345                 char *arg = argv[i];
 346
 347 #if ENABLE_DESKTOP
 348                 /* "dd --". NB: coreutils 6.9 will complain if they see
 349                  * more than one of them. We wouldn't. */
 350                 if (arg[0] == '-' && arg[1] == '-' && arg[2] == '\0')
 351                         continue;
 352 #endif
 353                 val = strchr(arg, '=');
 354                 if (val == NULL)
 355                         bb_show_usage();
 356                 *val = '\0';
 357                 what = index_in_strings(keywords, arg);
 358                 if (what < 0)
 359                         bb_show_usage();
 360                 /* *val = '='; - to preserve ps listing? */
 361                 val++;
 362 #if ENABLE_FEATURE_DD_IBS_OBS
 363                 if (what == OP_ibs) {
 364                         /* Must fit into positive ssize_t */
 365                         ibs = xatoul_range_sfx(val, 1, ((size_t)-1L)/2, cwbkMG_suffixes);
 366                         /*continue;*/
 367                 }
 368                 if (what == OP_obs) {
 369                         obs = xatoul_range_sfx(val, 1, ((size_t)-1L)/2, cwbkMG_suffixes);
 370                         /*continue;*/
 371                 }
 372                 if (what == OP_conv) {
 373                         G.flags |= parse_comma_flags(val, conv_words, "conv");
 374                         /*continue;*/
 375                 }
 376                 if (what == OP_iflag) {
 377                         G.flags |= parse_comma_flags(val, iflag_words, "iflag") << FLAG_IFLAG_SHIFT;
 378                         /*continue;*/
 379                 }
 380                 if (what == OP_oflag) {
 381                         G.flags |= parse_comma_flags(val, oflag_words, "oflag") << FLAG_OFLAG_SHIFT;
 382                         /*continue;*/
 383                 }
 384 #endif
 385                 if (what == OP_bs) {
 386                         ibs = xatoul_range_sfx(val, 1, ((size_t)-1L)/2, cwbkMG_suffixes);
 387                         obs = ibs;
 388                         /*continue;*/
 389                 }
 390                 /* These can be large: */
 391                 if (what == OP_count) {
 392                         G.flags |= FLAG_COUNT;
 393                         count = XATOU_SFX(val, cwbkMG_suffixes);
 394                         /*continue;*/
 395                 }
 396                 if (what == OP_seek) {
 397                         seek = XATOU_SFX(val, cwbkMG_suffixes);
 398                         /*continue;*/
 399                 }
 400                 if (what == OP_skip) {
 401                         skip = XATOU_SFX(val, cwbkMG_suffixes);
 402                         /*continue;*/
 403                 }
 404                 if (what == OP_if) {
 405                         infile = val;
 406                         /*continue;*/
 407                 }
 408                 if (what == OP_of) {
 409                         outfile = val;
 410                         /*continue;*/
 411                 }
 412 #if ENABLE_FEATURE_DD_STATUS
 413                 if (what == OP_status) {
 414                         int n;
 415                         n = index_in_strings(status_words, val);
 416                         if (n < 0)
 417                                 bb_error_msg_and_die(bb_msg_invalid_arg_to, val, "status");
 418                         G.flags |= FLAG_STATUS_NONE << n;
 419                         /*continue;*/
 420                 }
 421 #endif
 422         } /* end of "for (argv[i])" */
 423
 424 //XXX:FIXME for huge ibs or obs, malloc'ing them isn't the brightest idea ever
 425         ibuf = xmalloc(ibs);
 426         obuf = ibuf;
 427 #if ENABLE_FEATURE_DD_IBS_OBS
 428         if (ibs != obs) {
 429                 G.flags |= FLAG_TWOBUFS;
 430                 obuf = xmalloc(obs);
 431         }
 432 #endif
 433
 434 #if ENABLE_FEATURE_DD_SIGNAL_HANDLING
 435         signal_SA_RESTART_empty_mask(SIGUSR1, dd_output_status);
 436 #endif
 437 #if ENABLE_FEATURE_DD_THIRD_STATUS_LINE
 438         G.begin_time_us = monotonic_us();
 439 #endif
 440
 441         if (infile) {
 442                 xmove_fd(xopen(infile, O_RDONLY), ifd);
 443         } else {
 444                 infile = bb_msg_standard_input;
 445         }
 446         if (outfile) {
 447                 int oflag = O_WRONLY | O_CREAT;
 448
 449                 if (!seek && !(G.flags & FLAG_NOTRUNC))
 450                         oflag |= O_TRUNC;
 451
 452                 xmove_fd(xopen(outfile, oflag), ofd);
 453
 454                 if (seek && !(G.flags & FLAG_NOTRUNC)) {
 455                         size_t blocksz = (G.flags & FLAG_SEEK_BYTES) ? 1 : obs;
 456                         if (ftruncate(ofd, seek * blocksz) < 0) {
 457                                 struct stat st;
 458
 459                                 if (fstat(ofd, &st) < 0
 460                                  || S_ISREG(st.st_mode)
 461                                  || S_ISDIR(st.st_mode)
 462                                 ) {
 463                                         goto die_outfile;
 464                                 }
 465                         }
 466                 }
 467         } else {
 468                 outfile = bb_msg_standard_output;
 469         }
 470         if (skip) {
 471                 size_t blocksz = (G.flags & FLAG_SKIP_BYTES) ? 1 : ibs;
 472                 if (lseek(ifd, skip * blocksz, SEEK_CUR) < 0) {
 473                         do {
 474                                 ssize_t n;
 475 #if ENABLE_FEATURE_DD_IBS_OBS
 476                                 if (G.flags & FLAG_FULLBLOCK)
 477                                         n = full_read(ifd, ibuf, blocksz);
 478                                 else
 479 #endif
 480                                         n = safe_read(ifd, ibuf, blocksz);
 481                                 if (n < 0)
 482                                         goto die_infile;
 483                                 if (n == 0)
 484                                         break;
 485                         } while (--skip != 0);
 486                 }
 487         }
 488         if (seek) {
 489                 size_t blocksz = (G.flags & FLAG_SEEK_BYTES) ? 1 : obs;
 490                 if (lseek(ofd, seek * blocksz, SEEK_CUR) < 0)
 491                         goto die_outfile;
 492         }
 493
 494         while (!(G.flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) {
 495                 ssize_t n;
 496 #if ENABLE_FEATURE_DD_IBS_OBS
 497                 if (G.flags & FLAG_FULLBLOCK)
 498                         n = full_read(ifd, ibuf, ibs);
 499                 else
 500 #endif
 501                         n = safe_read(ifd, ibuf, ibs);
 502                 if (n == 0)
 503                         break;
 504                 if (n < 0) {
 505                         /* "Bad block" */
 506                         if (!(G.flags & FLAG_NOERROR))
 507                                 goto die_infile;
 508                         bb_simple_perror_msg(infile);
 509                         /* GNU dd with conv=noerror skips over bad blocks */
 510                         xlseek(ifd, ibs, SEEK_CUR);
 511                         /* conv=noerror,sync writes NULs,
 512                          * conv=noerror just ignores input bad blocks */
 513                         n = 0;
 514                 }
 515                 if (G.flags & FLAG_SWAB) {
 516                         uint16_t *p16;
 517                         ssize_t n2;
 518
 519                         /* Our code allows only last read to be odd-sized */
 520                         if (prev_read_size & 1)
 521                                 bb_error_msg_and_die("can't swab %lu byte buffer",
 522                                                 (unsigned long)prev_read_size);
 523                         prev_read_size = n;
 524
 525                         /* If n is odd, last byte is not swapped:
 526                          *  echo -n "qwe" | dd conv=swab
 527                          * prints "wqe".
 528                          */
 529                         p16 = (void*) ibuf;
 530                         n2 = (n >> 1);
 531                         while (--n2 >= 0) {
 532                                 *p16 = bswap_16(*p16);
 533                                 p16++;
 534                         }
 535                 }
 536                 if ((size_t)n == ibs)
 537                         G.in_full++;
 538                 else {
 539                         G.in_part++;
 540                         if (G.flags & FLAG_SYNC) {
 541                                 memset(ibuf + n, 0, ibs - n);
 542                                 n = ibs;
 543                         }
 544                 }
 545                 if (G.flags & FLAG_TWOBUFS) {
 546                         char *tmp = ibuf;
 547                         while (n) {
 548                                 size_t d = obs - oc;
 549
 550                                 if (d > (size_t)n)
 551                                         d = n;
 552                                 memcpy(obuf + oc, tmp, d);
 553                                 n -= d;
 554                                 tmp += d;
 555                                 oc += d;
 556                                 if (oc == obs) {
 557                                         if (write_and_stats(obuf, obs, obs, outfile))
 558                                                 goto out_status;
 559                                         oc = 0;
 560                                 }
 561                         }
 562                 } else {
 563                         if (write_and_stats(ibuf, n, obs, outfile))
 564                                 goto out_status;
 565                 }
 566         }
 567
 568         if (G.flags & FLAG_FSYNC) {
 569                 if (fsync(ofd) < 0)
 570                         goto die_outfile;
 571         }
 572
 573         if (ENABLE_FEATURE_DD_IBS_OBS && oc) {
 574                 if (write_and_stats(obuf, oc, obs, outfile))
 575                         goto out_status;
 576         }
 577         if (close(ifd) < 0) {
 578  die_infile:
 579                 bb_simple_perror_msg_and_die(infile);
 580         }
 581
 582         if (close(ofd) < 0) {
 583  die_outfile:
 584                 bb_simple_perror_msg_and_die(outfile);
 585         }
 586
 587         exitcode = EXIT_SUCCESS;
 588  out_status:
 589         if (!ENABLE_FEATURE_DD_STATUS || !(G.flags & FLAG_STATUS_NONE))
 590                 dd_output_status(0);
 591
 592         if (ENABLE_FEATURE_CLEAN_UP) {
 593                 free(obuf);
 594                 if (G.flags & FLAG_TWOBUFS)
 595                         free(ibuf);
 596         }
 597
 598         return exitcode;
 599 }