1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1985, 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1985, 1987, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif 41 42 #ifndef lint 43 static const char sccsid[] = "@(#)tcopy.c 8.2 (Berkeley) 4/17/94"; 44 #endif 45 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 #include <sys/ioctl.h> 49 #include <sys/mtio.h> 50 51 #include <err.h> 52 #include <errno.h> 53 #include <fcntl.h> 54 #include <paths.h> 55 #include <signal.h> 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 #define MAXREC (64 * 1024) 63 #define NOCOUNT (-2) 64 65 static int filen, guesslen, maxblk = MAXREC; 66 static uint64_t lastrec, record, size, tsize; 67 static FILE *msg; 68 69 static void *getspace(int); 70 static void intr(int); 71 static void usage(void) __dead2; 72 static void verify(int, int, char *); 73 static void writeop(int, int); 74 static void rewind_tape(int); 75 76 int 77 main(int argc, char *argv[]) 78 { 79 int lastnread, nread, nw, inp, outp; 80 enum {READ, VERIFY, COPY, COPYVERIFY} op = READ; 81 sig_t oldsig; 82 int ch, needeof; 83 char *buff; 84 const char *inf; 85 86 msg = stdout; 87 guesslen = 1; 88 outp = -1; 89 while ((ch = getopt(argc, argv, "cs:vx")) != -1) 90 switch((char)ch) { 91 case 'c': 92 op = COPYVERIFY; 93 break; 94 case 's': 95 maxblk = atoi(optarg); 96 if (maxblk <= 0) { 97 warnx("illegal block size"); 98 usage(); 99 } 100 guesslen = 0; 101 break; 102 case 'v': 103 op = VERIFY; 104 break; 105 case 'x': 106 msg = stderr; 107 break; 108 case '?': 109 default: 110 usage(); 111 } 112 argc -= optind; 113 argv += optind; 114 115 switch(argc) { 116 case 0: 117 if (op != READ) 118 usage(); 119 inf = _PATH_DEFTAPE; 120 break; 121 case 1: 122 if (op != READ) 123 usage(); 124 inf = argv[0]; 125 break; 126 case 2: 127 if (op == READ) 128 op = COPY; 129 inf = argv[0]; 130 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY : 131 op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0) 132 err(3, "%s", argv[1]); 133 break; 134 default: 135 usage(); 136 } 137 138 if ((inp = open(inf, O_RDONLY, 0)) < 0) 139 err(1, "%s", inf); 140 141 buff = getspace(maxblk); 142 143 if (op == VERIFY) { 144 verify(inp, outp, buff); 145 exit(0); 146 } 147 148 if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN) 149 (void) signal(SIGINT, intr); 150 151 needeof = 0; 152 for (lastnread = NOCOUNT;;) { 153 if ((nread = read(inp, buff, maxblk)) == -1) { 154 while (errno == EINVAL && (maxblk -= 1024)) { 155 nread = read(inp, buff, maxblk); 156 if (nread >= 0) 157 goto r1; 158 } 159 err(1, "read error, file %d, record %ju", filen, (intmax_t)record); 160 } else if (nread != lastnread) { 161 if (lastnread != 0 && lastnread != NOCOUNT) { 162 if (lastrec == 0 && nread == 0) 163 fprintf(msg, "%ju records\n", (intmax_t)record); 164 else if (record - lastrec > 1) 165 fprintf(msg, "records %ju to %ju\n", 166 (intmax_t)lastrec, (intmax_t)record); 167 else 168 fprintf(msg, "record %ju\n", (intmax_t)lastrec); 169 } 170 if (nread != 0) 171 fprintf(msg, "file %d: block size %d: ", 172 filen, nread); 173 (void) fflush(stdout); 174 lastrec = record; 175 } 176 r1: guesslen = 0; 177 if (nread > 0) { 178 if (op == COPY || op == COPYVERIFY) { 179 if (needeof) { 180 writeop(outp, MTWEOF); 181 needeof = 0; 182 } 183 nw = write(outp, buff, nread); 184 if (nw != nread) { 185 if (nw == -1) { 186 warn("write error, file %d, record %ju", filen, 187 (intmax_t)record); 188 } else { 189 warnx("write error, file %d, record %ju", filen, 190 (intmax_t)record); 191 warnx("write (%d) != read (%d)", nw, nread); 192 } 193 errx(5, "copy aborted"); 194 } 195 } 196 size += nread; 197 record++; 198 } else { 199 if (lastnread <= 0 && lastnread != NOCOUNT) { 200 fprintf(msg, "eot\n"); 201 break; 202 } 203 fprintf(msg, 204 "file %d: eof after %ju records: %ju bytes\n", 205 filen, (intmax_t)record, (intmax_t)size); 206 needeof = 1; 207 filen++; 208 tsize += size; 209 size = record = lastrec = 0; 210 lastnread = 0; 211 } 212 lastnread = nread; 213 } 214 fprintf(msg, "total length: %ju bytes\n", (intmax_t)tsize); 215 (void)signal(SIGINT, oldsig); 216 if (op == COPY || op == COPYVERIFY) { 217 writeop(outp, MTWEOF); 218 writeop(outp, MTWEOF); 219 if (op == COPYVERIFY) { 220 rewind_tape(outp); 221 rewind_tape(inp); 222 verify(inp, outp, buff); 223 } 224 } 225 exit(0); 226 } 227 228 static void 229 verify(int inp, int outp, char *outb) 230 { 231 int eot, inmaxblk, inn, outmaxblk, outn; 232 char *inb; 233 234 inb = getspace(maxblk); 235 inmaxblk = outmaxblk = maxblk; 236 for (eot = 0;; guesslen = 0) { 237 if ((inn = read(inp, inb, inmaxblk)) == -1) { 238 if (guesslen) 239 while (errno == EINVAL && (inmaxblk -= 1024)) { 240 inn = read(inp, inb, inmaxblk); 241 if (inn >= 0) 242 goto r1; 243 } 244 warn("read error"); 245 break; 246 } 247 r1: if ((outn = read(outp, outb, outmaxblk)) == -1) { 248 if (guesslen) 249 while (errno == EINVAL && (outmaxblk -= 1024)) { 250 outn = read(outp, outb, outmaxblk); 251 if (outn >= 0) 252 goto r2; 253 } 254 warn("read error"); 255 break; 256 } 257 r2: if (inn != outn) { 258 fprintf(msg, 259 "%s: tapes have different block sizes; %d != %d.\n", 260 "tcopy", inn, outn); 261 break; 262 } 263 if (!inn) { 264 if (eot++) { 265 fprintf(msg, "tcopy: tapes are identical.\n"); 266 free(inb); 267 return; 268 } 269 } else { 270 if (bcmp(inb, outb, inn)) { 271 fprintf(msg, 272 "tcopy: tapes have different data.\n"); 273 break; 274 } 275 eot = 0; 276 } 277 } 278 exit(1); 279 } 280 281 static void 282 intr(int signo __unused) 283 { 284 if (record) { 285 if (record - lastrec > 1) 286 fprintf(msg, "records %ju to %ju\n", (intmax_t)lastrec, (intmax_t)record); 287 else 288 fprintf(msg, "record %ju\n", (intmax_t)lastrec); 289 } 290 fprintf(msg, "interrupt at file %d: record %ju\n", filen, (intmax_t)record); 291 fprintf(msg, "total length: %ju bytes\n", (uintmax_t)(tsize + size)); 292 exit(1); 293 } 294 295 static void * 296 getspace(int blk) 297 { 298 void *bp; 299 300 if ((bp = malloc((size_t)blk)) == NULL) 301 errx(11, "no memory"); 302 return (bp); 303 } 304 305 static void 306 writeop(int fd, int type) 307 { 308 struct mtop op; 309 310 op.mt_op = type; 311 op.mt_count = (daddr_t)1; 312 if (ioctl(fd, MTIOCTOP, (char *)&op) < 0) 313 err(6, "tape op"); 314 } 315 316 static void 317 usage(void) 318 { 319 fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n"); 320 exit(1); 321 } 322 323 static void 324 rewind_tape(int fd) 325 { 326 struct stat sp; 327 328 if(fstat(fd, &sp)) 329 errx(12, "fstat in rewind"); 330 331 /* 332 * don't want to do tape ioctl on regular files: 333 */ 334 if( S_ISREG(sp.st_mode) ) { 335 if( lseek(fd, 0, SEEK_SET) == -1 ) 336 errx(13, "lseek"); 337 } else 338 /* assume its a tape */ 339 writeop(fd, MTREW); 340 } 341