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