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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1985, 1987, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #ifndef lint 45 static const char sccsid[] = "@(#)tcopy.c 8.2 (Berkeley) 4/17/94"; 46 #endif 47 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <sys/ioctl.h> 51 #include <sys/mtio.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <paths.h> 57 #include <signal.h> 58 #include <stdint.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 #define MAXREC (64 * 1024) 65 #define NOCOUNT (-2) 66 67 int filen, guesslen, maxblk = MAXREC; 68 u_int64_t lastrec, record, size, tsize; 69 FILE *msg; 70 71 void *getspace(int); 72 void intr(int); 73 static void usage(void) __dead2; 74 void verify(int, int, char *); 75 void writeop(int, int); 76 void rewind_tape(int); 77 78 int 79 main(int argc, char *argv[]) 80 { 81 int lastnread, nread, nw, inp, outp; 82 enum {READ, VERIFY, COPY, COPYVERIFY} op = READ; 83 sig_t oldsig; 84 int ch, needeof; 85 char *buff; 86 const char *inf; 87 88 msg = stdout; 89 guesslen = 1; 90 while ((ch = getopt(argc, argv, "cs:vx")) != -1) 91 switch((char)ch) { 92 case 'c': 93 op = COPYVERIFY; 94 break; 95 case 's': 96 maxblk = atoi(optarg); 97 if (maxblk <= 0) { 98 warnx("illegal block size"); 99 usage(); 100 } 101 guesslen = 0; 102 break; 103 case 'v': 104 op = VERIFY; 105 break; 106 case 'x': 107 msg = stderr; 108 break; 109 case '?': 110 default: 111 usage(); 112 } 113 argc -= optind; 114 argv += optind; 115 116 switch(argc) { 117 case 0: 118 if (op != READ) 119 usage(); 120 inf = _PATH_DEFTAPE; 121 break; 122 case 1: 123 if (op != READ) 124 usage(); 125 inf = argv[0]; 126 break; 127 case 2: 128 if (op == READ) 129 op = COPY; 130 inf = argv[0]; 131 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY : 132 op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0) 133 err(3, "%s", argv[1]); 134 break; 135 default: 136 usage(); 137 } 138 139 if ((inp = open(inf, O_RDONLY, 0)) < 0) 140 err(1, "%s", inf); 141 142 buff = getspace(maxblk); 143 144 if (op == VERIFY) { 145 verify(inp, outp, buff); 146 exit(0); 147 } 148 149 if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN) 150 (void) signal(SIGINT, intr); 151 152 needeof = 0; 153 for (lastnread = NOCOUNT;;) { 154 if ((nread = read(inp, buff, maxblk)) == -1) { 155 while (errno == EINVAL && (maxblk -= 1024)) { 156 nread = read(inp, buff, maxblk); 157 if (nread >= 0) 158 goto r1; 159 } 160 err(1, "read error, file %d, record %qu", filen, record); 161 } else if (nread != lastnread) { 162 if (lastnread != 0 && lastnread != NOCOUNT) { 163 if (lastrec == 0 && nread == 0) 164 fprintf(msg, "%qu records\n", record); 165 else if (record - lastrec > 1) 166 fprintf(msg, "records %qu to %qu\n", 167 lastrec, record); 168 else 169 fprintf(msg, "record %qu\n", lastrec); 170 } 171 if (nread != 0) 172 fprintf(msg, "file %d: block size %d: ", 173 filen, nread); 174 (void) fflush(stdout); 175 lastrec = record; 176 } 177 r1: guesslen = 0; 178 if (nread > 0) { 179 if (op == COPY || op == COPYVERIFY) { 180 if (needeof) { 181 writeop(outp, MTWEOF); 182 needeof = 0; 183 } 184 nw = write(outp, buff, nread); 185 if (nw != nread) { 186 if (nw == -1) { 187 warn("write error, file %d, record %qu", filen, record); 188 } else { 189 warnx("write error, file %d, record %qu", filen, record); 190 warnx("write (%d) != read (%d)", nw, nread); 191 } 192 errx(5, "copy aborted"); 193 } 194 } 195 size += nread; 196 record++; 197 } else { 198 if (lastnread <= 0 && lastnread != NOCOUNT) { 199 fprintf(msg, "eot\n"); 200 break; 201 } 202 fprintf(msg, 203 "file %d: eof after %qu records: %qu bytes\n", 204 filen, record, size); 205 needeof = 1; 206 filen++; 207 tsize += size; 208 size = record = lastrec = 0; 209 lastnread = 0; 210 } 211 lastnread = nread; 212 } 213 fprintf(msg, "total length: %qu bytes\n", tsize); 214 (void)signal(SIGINT, oldsig); 215 if (op == COPY || op == COPYVERIFY) { 216 writeop(outp, MTWEOF); 217 writeop(outp, MTWEOF); 218 if (op == COPYVERIFY) { 219 rewind_tape(outp); 220 rewind_tape(inp); 221 verify(inp, outp, buff); 222 } 223 } 224 exit(0); 225 } 226 227 void 228 verify(int inp, int outp, char *outb) 229 { 230 int eot, inmaxblk, inn, outmaxblk, outn; 231 char *inb; 232 233 inb = getspace(maxblk); 234 inmaxblk = outmaxblk = maxblk; 235 for (eot = 0;; guesslen = 0) { 236 if ((inn = read(inp, inb, inmaxblk)) == -1) { 237 if (guesslen) 238 while (errno == EINVAL && (inmaxblk -= 1024)) { 239 inn = read(inp, inb, inmaxblk); 240 if (inn >= 0) 241 goto r1; 242 } 243 warn("read error"); 244 break; 245 } 246 r1: if ((outn = read(outp, outb, outmaxblk)) == -1) { 247 if (guesslen) 248 while (errno == EINVAL && (outmaxblk -= 1024)) { 249 outn = read(outp, outb, outmaxblk); 250 if (outn >= 0) 251 goto r2; 252 } 253 warn("read error"); 254 break; 255 } 256 r2: if (inn != outn) { 257 fprintf(msg, 258 "%s: tapes have different block sizes; %d != %d.\n", 259 "tcopy", inn, outn); 260 break; 261 } 262 if (!inn) { 263 if (eot++) { 264 fprintf(msg, "tcopy: tapes are identical.\n"); 265 return; 266 } 267 } else { 268 if (bcmp(inb, outb, inn)) { 269 fprintf(msg, 270 "tcopy: tapes have different data.\n"); 271 break; 272 } 273 eot = 0; 274 } 275 } 276 exit(1); 277 } 278 279 void 280 intr(int signo __unused) 281 { 282 if (record) { 283 if (record - lastrec > 1) 284 fprintf(msg, "records %qu to %qu\n", lastrec, record); 285 else 286 fprintf(msg, "record %qu\n", lastrec); 287 } 288 fprintf(msg, "interrupt at file %d: record %qu\n", filen, record); 289 fprintf(msg, "total length: %ju bytes\n", (uintmax_t)(tsize + size)); 290 exit(1); 291 } 292 293 void * 294 getspace(int blk) 295 { 296 void *bp; 297 298 if ((bp = malloc((size_t)blk)) == NULL) 299 errx(11, "no memory"); 300 return (bp); 301 } 302 303 void 304 writeop(int fd, int type) 305 { 306 struct mtop op; 307 308 op.mt_op = type; 309 op.mt_count = (daddr_t)1; 310 if (ioctl(fd, MTIOCTOP, (char *)&op) < 0) 311 err(6, "tape op"); 312 } 313 314 static void 315 usage(void) 316 { 317 fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n"); 318 exit(1); 319 } 320 321 void 322 rewind_tape(int fd) 323 { 324 struct stat sp; 325 326 if(fstat(fd, &sp)) 327 errx(12, "fstat in rewind"); 328 329 /* 330 * don't want to do tape ioctl on regular files: 331 */ 332 if( S_ISREG(sp.st_mode) ) { 333 if( lseek(fd, 0, SEEK_SET) == -1 ) 334 errx(13, "lseek"); 335 } else 336 /* assume its a tape */ 337 writeop(fd, MTREW); 338 } 339