| 1 | /* |
| 2 | * Copyright (c) 1983, 1990 The Regents of the University of California. |
| 3 | * 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 | #ifndef lint |
| 35 | char copyright[] = |
| 36 | "@(#) Copyright (c) 1983, 1990 The Regents of the University of California.\n\ |
| 37 | All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)rcp.c 5.32 (Berkeley) 2/25/91"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | /* |
| 45 | * rcp |
| 46 | */ |
| 47 | #include <sys/param.h> |
| 48 | #include <sys/stat.h> |
| 49 | #include <sys/time.h> |
| 50 | #include <sys/ioctl.h> |
| 51 | #include <sys/socket.h> |
| 52 | #include <sys/wait.h> |
| 53 | #include <netinet/in.h> |
| 54 | #include <netinet/in_systm.h> |
| 55 | #include <netinet/ip.h> |
| 56 | #include <dirent.h> |
| 57 | #include <fcntl.h> |
| 58 | #include <signal.h> |
| 59 | #include <pwd.h> |
| 60 | #include <netdb.h> |
| 61 | #include <errno.h> |
| 62 | #include <unistd.h> |
| 63 | #include <stdio.h> |
| 64 | #include <stdlib.h> |
| 65 | #include <string.h> |
| 66 | #include <ctype.h> |
| 67 | #include "pathnames.h" |
| 68 | |
| 69 | #ifdef KERBEROS |
| 70 | #include <kerberosIV/des.h> |
| 71 | #include <kerberosIV/krb.h> |
| 72 | char dst_realm_buf[REALM_SZ]; |
| 73 | char *dest_realm = NULL; |
| 74 | int use_kerberos = 1; |
| 75 | CREDENTIALS cred; |
| 76 | Key_schedule schedule; |
| 77 | extern char *krb_realmofhost(); |
| 78 | #ifdef CRYPT |
| 79 | int doencrypt = 0; |
| 80 | #define OPTIONS "dfk:prtx" |
| 81 | #else |
| 82 | #define OPTIONS "dfk:prt" |
| 83 | #endif |
| 84 | #else |
| 85 | #define OPTIONS "dfprt" |
| 86 | #endif |
| 87 | |
| 88 | struct passwd *pwd; |
| 89 | u_short port; |
| 90 | uid_t userid; |
| 91 | int errs, rem; |
| 92 | int pflag, iamremote, iamrecursive, targetshouldbedirectory; |
| 93 | |
| 94 | #define CMDNEEDS 64 |
| 95 | char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ |
| 96 | |
| 97 | typedef struct _buf { |
| 98 | int cnt; |
| 99 | char *buf; |
| 100 | } BUF; |
| 101 | |
| 102 | void lostconn(); |
| 103 | |
| 104 | main(argc, argv) |
| 105 | int argc; |
| 106 | char **argv; |
| 107 | { |
| 108 | extern int optind; |
| 109 | extern char *optarg; |
| 110 | struct servent *sp; |
| 111 | int ch, fflag, tflag; |
| 112 | char *targ, *shell, *colon(); |
| 113 | |
| 114 | fflag = tflag = 0; |
| 115 | while ((ch = getopt(argc, argv, OPTIONS)) != EOF) |
| 116 | switch(ch) { |
| 117 | /* user-visible flags */ |
| 118 | case 'p': /* preserve access/mod times */ |
| 119 | ++pflag; |
| 120 | break; |
| 121 | case 'r': |
| 122 | ++iamrecursive; |
| 123 | break; |
| 124 | #ifdef KERBEROS |
| 125 | case 'k': |
| 126 | strncpy(dst_realm_buf, optarg, REALM_SZ); |
| 127 | dest_realm = dst_realm_buf; |
| 128 | break; |
| 129 | #ifdef CRYPT |
| 130 | case 'x': |
| 131 | doencrypt = 1; |
| 132 | /* des_set_key(cred.session, schedule); */ |
| 133 | break; |
| 134 | #endif |
| 135 | #endif |
| 136 | /* rshd-invoked options (server) */ |
| 137 | case 'd': |
| 138 | targetshouldbedirectory = 1; |
| 139 | break; |
| 140 | case 'f': /* "from" */ |
| 141 | iamremote = 1; |
| 142 | fflag = 1; |
| 143 | break; |
| 144 | case 't': /* "to" */ |
| 145 | iamremote = 1; |
| 146 | tflag = 1; |
| 147 | break; |
| 148 | |
| 149 | case '?': |
| 150 | default: |
| 151 | usage(); |
| 152 | } |
| 153 | argc -= optind; |
| 154 | argv += optind; |
| 155 | |
| 156 | #ifdef KERBEROS |
| 157 | #ifdef CRYPT |
| 158 | shell = doencrypt ? "ekshell" : "kshell"; |
| 159 | #else |
| 160 | shell = "kshell"; |
| 161 | #endif |
| 162 | sp = getservbyname(shell, "tcp"); |
| 163 | if (sp == NULL) { |
| 164 | char msgbuf[64]; |
| 165 | use_kerberos = 0; |
| 166 | (void)snprintf(msgbuf, sizeof(msgbuf), |
| 167 | "can't get entry for %s/tcp service", shell); |
| 168 | old_warning(msgbuf); |
| 169 | sp = getservbyname(shell = "shell", "tcp"); |
| 170 | } |
| 171 | #else |
| 172 | sp = getservbyname(shell = "shell", "tcp"); |
| 173 | #endif |
| 174 | if (sp == NULL) { |
| 175 | (void)fprintf(stderr, "rcp: %s/tcp: unknown service\n", shell); |
| 176 | exit(1); |
| 177 | } |
| 178 | port = sp->s_port; |
| 179 | |
| 180 | if (!(pwd = getpwuid(userid = getuid()))) { |
| 181 | (void)fprintf(stderr, "rcp: unknown user %d.\n", (int)userid); |
| 182 | exit(1); |
| 183 | } |
| 184 | |
| 185 | if (fflag) { |
| 186 | /* follow "protocol", send data */ |
| 187 | (void)response(); |
| 188 | (void)setuid(userid); |
| 189 | source(argc, argv); |
| 190 | exit(errs); |
| 191 | } |
| 192 | |
| 193 | if (tflag) { |
| 194 | /* receive data */ |
| 195 | (void)setuid(userid); |
| 196 | sink(argc, argv); |
| 197 | exit(errs); |
| 198 | } |
| 199 | |
| 200 | if (argc < 2) |
| 201 | usage(); |
| 202 | if (argc > 2) |
| 203 | targetshouldbedirectory = 1; |
| 204 | |
| 205 | rem = -1; |
| 206 | /* command to be executed on remote system using "rsh" */ |
| 207 | #ifdef KERBEROS |
| 208 | (void)snprintf(cmd, sizeof(cmd), |
| 209 | "rcp%s%s%s%s", iamrecursive ? " -r" : "", |
| 210 | #ifdef CRYPT |
| 211 | ((doencrypt && use_kerberos) ? " -x" : ""), |
| 212 | #else |
| 213 | "", |
| 214 | #endif |
| 215 | pflag ? " -p" : "", targetshouldbedirectory ? " -d" : ""); |
| 216 | #else |
| 217 | (void)snprintf(cmd, sizeof(cmd), "rcp%s%s%s", |
| 218 | iamrecursive ? " -r" : "", pflag ? " -p" : "", |
| 219 | targetshouldbedirectory ? " -d" : ""); |
| 220 | #endif |
| 221 | |
| 222 | (void)signal(SIGPIPE, lostconn); |
| 223 | |
| 224 | if (targ = colon(argv[argc - 1])) |
| 225 | toremote(targ, argc, argv); /* destination is remote host */ |
| 226 | else { |
| 227 | tolocal(argc, argv); /* destination is local host */ |
| 228 | if (targetshouldbedirectory) |
| 229 | verifydir(argv[argc - 1]); |
| 230 | } |
| 231 | exit(errs); |
| 232 | } |
| 233 | |
| 234 | toremote(targ, argc, argv) |
| 235 | char *targ; |
| 236 | int argc; |
| 237 | char **argv; |
| 238 | { |
| 239 | int i, len, tos; |
| 240 | char *bp, *host, *src, *suser, *thost, *tuser; |
| 241 | char *colon(); |
| 242 | |
| 243 | *targ++ = 0; |
| 244 | if (*targ == 0) |
| 245 | targ = "."; |
| 246 | |
| 247 | if (thost = index(argv[argc - 1], '@')) { |
| 248 | /* user@host */ |
| 249 | *thost++ = 0; |
| 250 | tuser = argv[argc - 1]; |
| 251 | if (*tuser == '\0') |
| 252 | tuser = NULL; |
| 253 | else if (!okname(tuser)) |
| 254 | exit(1); |
| 255 | } else { |
| 256 | thost = argv[argc - 1]; |
| 257 | tuser = NULL; |
| 258 | } |
| 259 | |
| 260 | for (i = 0; i < argc - 1; i++) { |
| 261 | src = colon(argv[i]); |
| 262 | if (src) { /* remote to remote */ |
| 263 | *src++ = 0; |
| 264 | if (*src == 0) |
| 265 | src = "."; |
| 266 | host = index(argv[i], '@'); |
| 267 | len = strlen(_PATH_RSH) + strlen(argv[i]) + |
| 268 | strlen(src) + (tuser ? strlen(tuser) : 0) + |
| 269 | strlen(thost) + strlen(targ) + CMDNEEDS + 20; |
| 270 | if (!(bp = malloc(len))) |
| 271 | nospace(); |
| 272 | if (host) { |
| 273 | *host++ = 0; |
| 274 | suser = argv[i]; |
| 275 | if (*suser == '\0') |
| 276 | suser = pwd->pw_name; |
| 277 | else if (!okname(suser)) |
| 278 | continue; |
| 279 | (void)snprintf(bp, len, |
| 280 | "%s %s -l %s -n %s %s '%s%s%s:%s'", |
| 281 | _PATH_RSH, host, suser, cmd, src, |
| 282 | tuser ? tuser : "", tuser ? "@" : "", |
| 283 | thost, targ); |
| 284 | } else |
| 285 | (void)snprintf(bp, len, |
| 286 | "%s %s -n %s %s '%s%s%s:%s'", |
| 287 | _PATH_RSH, argv[i], cmd, src, |
| 288 | tuser ? tuser : "", tuser ? "@" : "", |
| 289 | thost, targ); |
| 290 | (void)susystem(bp); |
| 291 | (void)free(bp); |
| 292 | } else { /* local to remote */ |
| 293 | if (rem == -1) { |
| 294 | len = strlen(targ) + CMDNEEDS + 20; |
| 295 | if (!(bp = malloc(len))) |
| 296 | nospace(); |
| 297 | (void)snprintf(bp, len, "%s -t %s", cmd, targ); |
| 298 | host = thost; |
| 299 | #ifdef KERBEROS |
| 300 | if (use_kerberos) |
| 301 | rem = kerberos(&host, bp, |
| 302 | pwd->pw_name, |
| 303 | tuser ? tuser : pwd->pw_name); |
| 304 | else |
| 305 | #endif |
| 306 | rem = rcmd(&host, port, pwd->pw_name, |
| 307 | tuser ? tuser : pwd->pw_name, |
| 308 | bp, 0); |
| 309 | if (rem < 0) |
| 310 | exit(1); |
| 311 | tos = IPTOS_THROUGHPUT; |
| 312 | if (setsockopt(rem, IPPROTO_IP, IP_TOS, |
| 313 | (char *)&tos, sizeof(int)) < 0) |
| 314 | perror("rcp: setsockopt TOS (ignored)"); |
| 315 | if (response() < 0) |
| 316 | exit(1); |
| 317 | (void)free(bp); |
| 318 | (void)setuid(userid); |
| 319 | } |
| 320 | source(1, argv+i); |
| 321 | } |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | tolocal(argc, argv) |
| 326 | int argc; |
| 327 | char **argv; |
| 328 | { |
| 329 | int i, len, tos; |
| 330 | char *bp, *host, *src, *suser; |
| 331 | char *colon(); |
| 332 | |
| 333 | for (i = 0; i < argc - 1; i++) { |
| 334 | if (!(src = colon(argv[i]))) { /* local to local */ |
| 335 | len = strlen(_PATH_CP) + strlen(argv[i]) + |
| 336 | strlen(argv[argc - 1]) + 20; |
| 337 | if (!(bp = malloc(len))) |
| 338 | nospace(); |
| 339 | (void)snprintf(bp, len, "%s%s%s %s %s", _PATH_CP, |
| 340 | iamrecursive ? " -r" : "", pflag ? " -p" : "", |
| 341 | argv[i], argv[argc - 1]); |
| 342 | (void)susystem(bp); |
| 343 | (void)free(bp); |
| 344 | continue; |
| 345 | } |
| 346 | *src++ = 0; |
| 347 | if (*src == 0) |
| 348 | src = "."; |
| 349 | host = index(argv[i], '@'); |
| 350 | if (host) { |
| 351 | *host++ = 0; |
| 352 | suser = argv[i]; |
| 353 | if (*suser == '\0') |
| 354 | suser = pwd->pw_name; |
| 355 | else if (!okname(suser)) |
| 356 | continue; |
| 357 | } else { |
| 358 | host = argv[i]; |
| 359 | suser = pwd->pw_name; |
| 360 | } |
| 361 | len = strlen(src) + CMDNEEDS + 20; |
| 362 | if (!(bp = malloc(len))) |
| 363 | nospace(); |
| 364 | (void)snprintf(bp, len, "%s -f %s", cmd, src); |
| 365 | #ifdef KERBEROS |
| 366 | if (use_kerberos) |
| 367 | rem = kerberos(&host, bp, pwd->pw_name, suser); |
| 368 | else |
| 369 | #endif |
| 370 | rem = rcmd(&host, port, pwd->pw_name, suser, bp, 0); |
| 371 | (void)free(bp); |
| 372 | if (rem < 0) |
| 373 | continue; |
| 374 | (void)seteuid(userid); |
| 375 | tos = IPTOS_THROUGHPUT; |
| 376 | if (setsockopt(rem, IPPROTO_IP, IP_TOS, |
| 377 | (char *)&tos, sizeof(int)) < 0) |
| 378 | perror("rcp: setsockopt TOS (ignored)"); |
| 379 | sink(1, argv + argc - 1); |
| 380 | (void)seteuid(0); |
| 381 | (void)close(rem); |
| 382 | rem = -1; |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | verifydir(cp) |
| 387 | char *cp; |
| 388 | { |
| 389 | struct stat stb; |
| 390 | |
| 391 | if (stat(cp, &stb) >= 0) { |
| 392 | if ((stb.st_mode & S_IFMT) == S_IFDIR) |
| 393 | return; |
| 394 | errno = ENOTDIR; |
| 395 | } |
| 396 | error("rcp: %s: %s.\n", cp, strerror(errno)); |
| 397 | exit(1); |
| 398 | } |
| 399 | |
| 400 | char * |
| 401 | colon(cp) |
| 402 | register char *cp; |
| 403 | { |
| 404 | for (; *cp; ++cp) { |
| 405 | if (*cp == ':') |
| 406 | return(cp); |
| 407 | if (*cp == '/') |
| 408 | return(0); |
| 409 | } |
| 410 | return(0); |
| 411 | } |
| 412 | |
| 413 | okname(cp0) |
| 414 | char *cp0; |
| 415 | { |
| 416 | register char *cp = cp0; |
| 417 | register int c; |
| 418 | |
| 419 | do { |
| 420 | c = *cp; |
| 421 | if (c & 0200) |
| 422 | goto bad; |
| 423 | if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-') |
| 424 | goto bad; |
| 425 | } while (*++cp); |
| 426 | return(1); |
| 427 | bad: |
| 428 | (void)fprintf(stderr, "rcp: invalid user name %s\n", cp0); |
| 429 | return(0); |
| 430 | } |
| 431 | |
| 432 | susystem(s) |
| 433 | char *s; |
| 434 | { |
| 435 | int status, pid, w; |
| 436 | register sig_t istat, qstat; |
| 437 | |
| 438 | if ((pid = vfork()) == 0) { |
| 439 | (void)setuid(userid); |
| 440 | execl(_PATH_BSHELL, "sh", "-c", s, (char *)0); |
| 441 | _exit(127); |
| 442 | } |
| 443 | istat = signal(SIGINT, SIG_IGN); |
| 444 | qstat = signal(SIGQUIT, SIG_IGN); |
| 445 | while ((w = wait(&status)) != pid && w != -1) |
| 446 | ; |
| 447 | if (w == -1) |
| 448 | status = -1; |
| 449 | (void)signal(SIGINT, istat); |
| 450 | (void)signal(SIGQUIT, qstat); |
| 451 | return(status); |
| 452 | } |
| 453 | |
| 454 | source(argc, argv) |
| 455 | int argc; |
| 456 | char **argv; |
| 457 | { |
| 458 | struct stat stb; |
| 459 | static BUF buffer; |
| 460 | BUF *bp; |
| 461 | off_t i; |
| 462 | int x, readerr, f, amt; |
| 463 | char *last, *name, buf[BUFSIZ]; |
| 464 | BUF *allocbuf(); |
| 465 | |
| 466 | for (x = 0; x < argc; x++) { |
| 467 | name = argv[x]; |
| 468 | if ((f = open(name, O_RDONLY, 0)) < 0) { |
| 469 | error("rcp: %s: %s\n", name, strerror(errno)); |
| 470 | continue; |
| 471 | } |
| 472 | if (fstat(f, &stb) < 0) |
| 473 | goto notreg; |
| 474 | switch (stb.st_mode&S_IFMT) { |
| 475 | |
| 476 | case S_IFREG: |
| 477 | break; |
| 478 | |
| 479 | case S_IFDIR: |
| 480 | if (iamrecursive) { |
| 481 | (void)close(f); |
| 482 | rsource(name, &stb); |
| 483 | continue; |
| 484 | } |
| 485 | /* FALLTHROUGH */ |
| 486 | default: |
| 487 | notreg: (void)close(f); |
| 488 | error("rcp: %s: not a plain file\n", name); |
| 489 | continue; |
| 490 | } |
| 491 | last = rindex(name, '/'); |
| 492 | if (last == 0) |
| 493 | last = name; |
| 494 | else |
| 495 | last++; |
| 496 | if (pflag) { |
| 497 | /* |
| 498 | * Make it compatible with possible future |
| 499 | * versions expecting microseconds. |
| 500 | */ |
| 501 | (void)snprintf(buf, sizeof(buf), |
| 502 | "T%ld 0 %ld 0\n", stb.st_mtime, stb.st_atime); |
| 503 | (void)write(rem, buf, (int)strlen(buf)); |
| 504 | if (response() < 0) { |
| 505 | (void)close(f); |
| 506 | continue; |
| 507 | } |
| 508 | } |
| 509 | (void)snprintf(buf, sizeof(buf), |
| 510 | "C%04o %ld %s\n", stb.st_mode&07777, stb.st_size, last); |
| 511 | (void)write(rem, buf, (int)strlen(buf)); |
| 512 | if (response() < 0) { |
| 513 | (void)close(f); |
| 514 | continue; |
| 515 | } |
| 516 | if ((bp = allocbuf(&buffer, f, BUFSIZ)) == 0) { |
| 517 | (void)close(f); |
| 518 | continue; |
| 519 | } |
| 520 | readerr = 0; |
| 521 | for (i = 0; i < stb.st_size; i += bp->cnt) { |
| 522 | amt = bp->cnt; |
| 523 | if (i + amt > stb.st_size) |
| 524 | amt = stb.st_size - i; |
| 525 | if (readerr == 0 && read(f, bp->buf, amt) != amt) |
| 526 | readerr = errno; |
| 527 | (void)write(rem, bp->buf, amt); |
| 528 | } |
| 529 | (void)close(f); |
| 530 | if (readerr == 0) |
| 531 | (void)write(rem, "", 1); |
| 532 | else |
| 533 | error("rcp: %s: %s\n", name, strerror(readerr)); |
| 534 | (void)response(); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | rsource(name, statp) |
| 539 | char *name; |
| 540 | struct stat *statp; |
| 541 | { |
| 542 | DIR *dirp; |
| 543 | struct dirent *dp; |
| 544 | char *last, *vect[1], path[MAXPATHLEN]; |
| 545 | |
| 546 | if (!(dirp = opendir(name))) { |
| 547 | error("rcp: %s: %s\n", name, strerror(errno)); |
| 548 | return; |
| 549 | } |
| 550 | last = rindex(name, '/'); |
| 551 | if (last == 0) |
| 552 | last = name; |
| 553 | else |
| 554 | last++; |
| 555 | if (pflag) { |
| 556 | (void)snprintf(path, sizeof(path), |
| 557 | "T%ld 0 %ld 0\n", statp->st_mtime, statp->st_atime); |
| 558 | (void)write(rem, path, (int)strlen(path)); |
| 559 | if (response() < 0) { |
| 560 | closedir(dirp); |
| 561 | return; |
| 562 | } |
| 563 | } |
| 564 | (void)snprintf(path, sizeof(path), |
| 565 | "D%04o %d %s\n", statp->st_mode&07777, 0, last); |
| 566 | (void)write(rem, path, (int)strlen(path)); |
| 567 | if (response() < 0) { |
| 568 | closedir(dirp); |
| 569 | return; |
| 570 | } |
| 571 | while (dp = readdir(dirp)) { |
| 572 | if (dp->d_ino == 0) |
| 573 | continue; |
| 574 | if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) |
| 575 | continue; |
| 576 | if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) { |
| 577 | error("%s/%s: name too long.\n", name, dp->d_name); |
| 578 | continue; |
| 579 | } |
| 580 | (void)snprintf(path, sizeof(path), "%s/%s", name, dp->d_name); |
| 581 | vect[0] = path; |
| 582 | source(1, vect); |
| 583 | } |
| 584 | closedir(dirp); |
| 585 | (void)write(rem, "E\n", 2); |
| 586 | (void)response(); |
| 587 | } |
| 588 | |
| 589 | response() |
| 590 | { |
| 591 | register char *cp; |
| 592 | char ch, resp, rbuf[BUFSIZ]; |
| 593 | |
| 594 | if (read(rem, &resp, sizeof(resp)) != sizeof(resp)) |
| 595 | lostconn(); |
| 596 | |
| 597 | cp = rbuf; |
| 598 | switch(resp) { |
| 599 | case 0: /* ok */ |
| 600 | return(0); |
| 601 | default: |
| 602 | *cp++ = resp; |
| 603 | /* FALLTHROUGH */ |
| 604 | case 1: /* error, followed by err msg */ |
| 605 | case 2: /* fatal error, "" */ |
| 606 | do { |
| 607 | if (read(rem, &ch, sizeof(ch)) != sizeof(ch)) |
| 608 | lostconn(); |
| 609 | *cp++ = ch; |
| 610 | } while (cp < &rbuf[BUFSIZ] && ch != '\n'); |
| 611 | |
| 612 | if (!iamremote) |
| 613 | (void)write(2, rbuf, cp - rbuf); |
| 614 | ++errs; |
| 615 | if (resp == 1) |
| 616 | return(-1); |
| 617 | exit(1); |
| 618 | } |
| 619 | /*NOTREACHED*/ |
| 620 | } |
| 621 | |
| 622 | void |
| 623 | lostconn() |
| 624 | { |
| 625 | if (!iamremote) |
| 626 | (void)fprintf(stderr, "rcp: lost connection\n"); |
| 627 | exit(1); |
| 628 | } |
| 629 | |
| 630 | sink(argc, argv) |
| 631 | int argc; |
| 632 | char **argv; |
| 633 | { |
| 634 | register char *cp; |
| 635 | static BUF buffer; |
| 636 | struct stat stb; |
| 637 | struct timeval tv[2]; |
| 638 | enum { YES, NO, DISPLAYED } wrerr; |
| 639 | BUF *bp, *allocbuf(); |
| 640 | off_t i, j; |
| 641 | char ch, *targ, *why; |
| 642 | int amt, count, exists, first, mask, mode; |
| 643 | int ofd, setimes, size, targisdir; |
| 644 | char *np, *vect[1], buf[BUFSIZ]; |
| 645 | |
| 646 | #define atime tv[0] |
| 647 | #define mtime tv[1] |
| 648 | #define SCREWUP(str) { why = str; goto screwup; } |
| 649 | |
| 650 | setimes = targisdir = 0; |
| 651 | mask = umask(0); |
| 652 | if (!pflag) |
| 653 | (void)umask(mask); |
| 654 | if (argc != 1) { |
| 655 | error("rcp: ambiguous target\n"); |
| 656 | exit(1); |
| 657 | } |
| 658 | targ = *argv; |
| 659 | if (targetshouldbedirectory) |
| 660 | verifydir(targ); |
| 661 | (void)write(rem, "", 1); |
| 662 | if (stat(targ, &stb) == 0 && (stb.st_mode & S_IFMT) == S_IFDIR) |
| 663 | targisdir = 1; |
| 664 | for (first = 1;; first = 0) { |
| 665 | cp = buf; |
| 666 | if (read(rem, cp, 1) <= 0) |
| 667 | return; |
| 668 | if (*cp++ == '\n') |
| 669 | SCREWUP("unexpected <newline>"); |
| 670 | do { |
| 671 | if (read(rem, &ch, sizeof(ch)) != sizeof(ch)) |
| 672 | SCREWUP("lost connection"); |
| 673 | *cp++ = ch; |
| 674 | } while (cp < &buf[BUFSIZ - 1] && ch != '\n'); |
| 675 | *cp = 0; |
| 676 | |
| 677 | if (buf[0] == '\01' || buf[0] == '\02') { |
| 678 | if (iamremote == 0) |
| 679 | (void)write(2, buf + 1, (int)strlen(buf + 1)); |
| 680 | if (buf[0] == '\02') |
| 681 | exit(1); |
| 682 | errs++; |
| 683 | continue; |
| 684 | } |
| 685 | if (buf[0] == 'E') { |
| 686 | (void)write(rem, "", 1); |
| 687 | return; |
| 688 | } |
| 689 | |
| 690 | if (ch == '\n') |
| 691 | *--cp = 0; |
| 692 | |
| 693 | #define getnum(t) (t) = 0; while (isdigit(*cp)) (t) = (t) * 10 + (*cp++ - '0'); |
| 694 | cp = buf; |
| 695 | if (*cp == 'T') { |
| 696 | setimes++; |
| 697 | cp++; |
| 698 | getnum(mtime.tv_sec); |
| 699 | if (*cp++ != ' ') |
| 700 | SCREWUP("mtime.sec not delimited"); |
| 701 | getnum(mtime.tv_usec); |
| 702 | if (*cp++ != ' ') |
| 703 | SCREWUP("mtime.usec not delimited"); |
| 704 | getnum(atime.tv_sec); |
| 705 | if (*cp++ != ' ') |
| 706 | SCREWUP("atime.sec not delimited"); |
| 707 | getnum(atime.tv_usec); |
| 708 | if (*cp++ != '\0') |
| 709 | SCREWUP("atime.usec not delimited"); |
| 710 | (void)write(rem, "", 1); |
| 711 | continue; |
| 712 | } |
| 713 | if (*cp != 'C' && *cp != 'D') { |
| 714 | /* |
| 715 | * Check for the case "rcp remote:foo\* local:bar". |
| 716 | * In this case, the line "No match." can be returned |
| 717 | * by the shell before the rcp command on the remote is |
| 718 | * executed so the ^Aerror_message convention isn't |
| 719 | * followed. |
| 720 | */ |
| 721 | if (first) { |
| 722 | error("%s\n", cp); |
| 723 | exit(1); |
| 724 | } |
| 725 | SCREWUP("expected control record"); |
| 726 | } |
| 727 | mode = 0; |
| 728 | for (++cp; cp < buf + 5; cp++) { |
| 729 | if (*cp < '0' || *cp > '7') |
| 730 | SCREWUP("bad mode"); |
| 731 | mode = (mode << 3) | (*cp - '0'); |
| 732 | } |
| 733 | if (*cp++ != ' ') |
| 734 | SCREWUP("mode not delimited"); |
| 735 | size = 0; |
| 736 | while (isdigit(*cp)) |
| 737 | size = size * 10 + (*cp++ - '0'); |
| 738 | if (*cp++ != ' ') |
| 739 | SCREWUP("size not delimited"); |
| 740 | if (targisdir) { |
| 741 | static char *namebuf; |
| 742 | static int cursize; |
| 743 | size_t need; |
| 744 | |
| 745 | need = strlen(targ) + strlen(cp) + 250; |
| 746 | if (need > cursize) { |
| 747 | if (!(namebuf = malloc(need))) |
| 748 | error("out of memory\n"); |
| 749 | } |
| 750 | (void)snprintf(namebuf, need, "%s%s%s", targ, |
| 751 | *targ ? "/" : "", cp); |
| 752 | np = namebuf; |
| 753 | } |
| 754 | else |
| 755 | np = targ; |
| 756 | exists = stat(np, &stb) == 0; |
| 757 | if (buf[0] == 'D') { |
| 758 | if (exists) { |
| 759 | if ((stb.st_mode&S_IFMT) != S_IFDIR) { |
| 760 | errno = ENOTDIR; |
| 761 | goto bad; |
| 762 | } |
| 763 | if (pflag) |
| 764 | (void)chmod(np, mode); |
| 765 | } else if (mkdir(np, mode) < 0) |
| 766 | goto bad; |
| 767 | vect[0] = np; |
| 768 | sink(1, vect); |
| 769 | if (setimes) { |
| 770 | setimes = 0; |
| 771 | if (utimes(np, tv) < 0) |
| 772 | error("rcp: can't set times on %s: %s\n", |
| 773 | np, strerror(errno)); |
| 774 | } |
| 775 | continue; |
| 776 | } |
| 777 | if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { |
| 778 | bad: error("rcp: %s: %s\n", np, strerror(errno)); |
| 779 | continue; |
| 780 | } |
| 781 | if (exists && pflag) |
| 782 | (void)fchmod(ofd, mode); |
| 783 | (void)write(rem, "", 1); |
| 784 | if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == 0) { |
| 785 | (void)close(ofd); |
| 786 | continue; |
| 787 | } |
| 788 | cp = bp->buf; |
| 789 | count = 0; |
| 790 | wrerr = NO; |
| 791 | for (i = 0; i < size; i += BUFSIZ) { |
| 792 | amt = BUFSIZ; |
| 793 | if (i + amt > size) |
| 794 | amt = size - i; |
| 795 | count += amt; |
| 796 | do { |
| 797 | j = read(rem, cp, amt); |
| 798 | if (j <= 0) { |
| 799 | error("rcp: %s\n", |
| 800 | j ? strerror(errno) : |
| 801 | "dropped connection"); |
| 802 | exit(1); |
| 803 | } |
| 804 | amt -= j; |
| 805 | cp += j; |
| 806 | } while (amt > 0); |
| 807 | if (count == bp->cnt) { |
| 808 | if (wrerr == NO && |
| 809 | write(ofd, bp->buf, count) != count) |
| 810 | wrerr = YES; |
| 811 | count = 0; |
| 812 | cp = bp->buf; |
| 813 | } |
| 814 | } |
| 815 | if (count != 0 && wrerr == NO && |
| 816 | write(ofd, bp->buf, count) != count) |
| 817 | wrerr = YES; |
| 818 | if (ftruncate(ofd, size)) { |
| 819 | error("rcp: can't truncate %s: %s\n", np, |
| 820 | strerror(errno)); |
| 821 | wrerr = DISPLAYED; |
| 822 | } |
| 823 | (void)close(ofd); |
| 824 | (void)response(); |
| 825 | if (setimes && wrerr == NO) { |
| 826 | setimes = 0; |
| 827 | if (utimes(np, tv) < 0) { |
| 828 | error("rcp: can't set times on %s: %s\n", |
| 829 | np, strerror(errno)); |
| 830 | wrerr = DISPLAYED; |
| 831 | } |
| 832 | } |
| 833 | switch(wrerr) { |
| 834 | case YES: |
| 835 | error("rcp: %s: %s\n", np, strerror(errno)); |
| 836 | break; |
| 837 | case NO: |
| 838 | (void)write(rem, "", 1); |
| 839 | break; |
| 840 | case DISPLAYED: |
| 841 | break; |
| 842 | } |
| 843 | } |
| 844 | screwup: |
| 845 | error("rcp: protocol screwup: %s\n", why); |
| 846 | exit(1); |
| 847 | } |
| 848 | |
| 849 | BUF * |
| 850 | allocbuf(bp, fd, blksize) |
| 851 | BUF *bp; |
| 852 | int fd, blksize; |
| 853 | { |
| 854 | struct stat stb; |
| 855 | size_t size; |
| 856 | |
| 857 | if (fstat(fd, &stb) < 0) { |
| 858 | error("rcp: fstat: %s\n", strerror(errno)); |
| 859 | return(0); |
| 860 | } |
| 861 | size = roundup(stb.st_blksize, blksize); |
| 862 | if (size == 0) |
| 863 | size = blksize; |
| 864 | if (bp->cnt < size) { |
| 865 | if (bp->buf != 0) |
| 866 | free(bp->buf); |
| 867 | bp->buf = malloc(size); |
| 868 | if (!bp->buf) { |
| 869 | error("rcp: malloc: out of memory\n"); |
| 870 | return(0); |
| 871 | } |
| 872 | } |
| 873 | bp->cnt = size; |
| 874 | return(bp); |
| 875 | } |
| 876 | |
| 877 | /* VARARGS1 */ |
| 878 | error(fmt, a1, a2, a3) |
| 879 | char *fmt; |
| 880 | int a1, a2, a3; |
| 881 | { |
| 882 | static FILE *fp; |
| 883 | |
| 884 | ++errs; |
| 885 | if (!fp && !(fp = fdopen(rem, "w"))) |
| 886 | return; |
| 887 | (void)fprintf(fp, "%c", 0x01); |
| 888 | (void)fprintf(fp, fmt, a1, a2, a3); |
| 889 | (void)fflush(fp); |
| 890 | if (!iamremote) |
| 891 | (void)fprintf(stderr, fmt, a1, a2, a3); |
| 892 | } |
| 893 | |
| 894 | nospace() |
| 895 | { |
| 896 | (void)fprintf(stderr, "rcp: out of memory.\n"); |
| 897 | exit(1); |
| 898 | } |
| 899 | |
| 900 | |
| 901 | usage() |
| 902 | { |
| 903 | #ifdef KERBEROS |
| 904 | #ifdef CRYPT |
| 905 | (void)fprintf(stderr, "%s\n\t%s\n", |
| 906 | "usage: rcp [-k realm] [-px] f1 f2", |
| 907 | "or: rcp [-k realm] [-rpx] f1 ... fn directory"); |
| 908 | #else |
| 909 | (void)fprintf(stderr, "%s\n\t%s\n", |
| 910 | "usage: rcp [-k realm] [-p] f1 f2", |
| 911 | "or: rcp [-k realm] [-rp] f1 ... fn directory"); |
| 912 | #endif |
| 913 | #else |
| 914 | (void)fprintf(stderr, |
| 915 | "usage: rcp [-p] f1 f2; or: rcp [-rp] f1 ... fn directory\n"); |
| 916 | #endif |
| 917 | exit(1); |
| 918 | } |
| 919 | |
| 920 | #ifdef KERBEROS |
| 921 | old_warning(str) |
| 922 | char *str; |
| 923 | { |
| 924 | (void)fprintf(stderr, "rcp: warning: %s, using standard rcp\n", str); |
| 925 | } |
| 926 | |
| 927 | int |
| 928 | kerberos(host, bp, locuser, user) |
| 929 | |
| 930 | char **host, *bp, *locuser, *user; |
| 931 | { |
| 932 | struct servent *sp; |
| 933 | |
| 934 | again: |
| 935 | if (use_kerberos) { |
| 936 | rem = KSUCCESS; |
| 937 | errno = 0; |
| 938 | if (dest_realm == NULL) |
| 939 | dest_realm = krb_realmofhost(*host); |
| 940 | |
| 941 | #ifdef CRYPT |
| 942 | if (doencrypt) |
| 943 | rem = krcmd_mutual( |
| 944 | host, port, |
| 945 | user, bp, 0, |
| 946 | dest_realm, |
| 947 | &cred, schedule); |
| 948 | else |
| 949 | #endif |
| 950 | rem = krcmd( |
| 951 | host, port, |
| 952 | user, bp, 0, dest_realm); |
| 953 | |
| 954 | if (rem < 0) { |
| 955 | use_kerberos = 0; |
| 956 | sp = getservbyname("shell", "tcp"); |
| 957 | if (sp == NULL) { |
| 958 | (void)fprintf(stderr, |
| 959 | "rcp: unknown service shell/tcp\n"); |
| 960 | exit(1); |
| 961 | } |
| 962 | if (errno == ECONNREFUSED) |
| 963 | old_warning( |
| 964 | "remote host doesn't support Kerberos"); |
| 965 | |
| 966 | if (errno == ENOENT) |
| 967 | old_warning( |
| 968 | "Can't provide Kerberos auth data"); |
| 969 | port = sp->s_port; |
| 970 | goto again; |
| 971 | } |
| 972 | } else { |
| 973 | #ifdef CRYPT |
| 974 | if (doencrypt) { |
| 975 | fprintf(stderr, |
| 976 | "The -x option requires Kerberos authentication\n"); |
| 977 | exit(1); |
| 978 | } |
| 979 | #endif |
| 980 | rem = rcmd(host, sp->s_port, locuser, user, bp, 0); |
| 981 | } |
| 982 | return(rem); |
| 983 | } |
| 984 | #endif /* KERBEROS */ |