rcp.c revision 1.15
1 /* $NetBSD: rcp.c,v 1.15 1997/07/20 20:47:32 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1990, 1992, 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1990, 1992, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)rcp.c 8.2 (Berkeley) 4/2/94"; 45 #else 46 __RCSID("$NetBSD: rcp.c,v 1.15 1997/07/20 20:47:32 christos Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/stat.h> 52 #include <sys/time.h> 53 #include <sys/socket.h> 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/ip.h> 57 58 #include <ctype.h> 59 #include <dirent.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <netdb.h> 64 #include <pwd.h> 65 #include <signal.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <string.h> 70 #include <unistd.h> 71 72 #include "pathnames.h" 73 #include "extern.h" 74 75 #ifdef KERBEROS 76 #include <kerberosIV/des.h> 77 #include <kerberosIV/krb.h> 78 79 char dst_realm_buf[REALM_SZ]; 80 char *dest_realm = NULL; 81 int use_kerberos = 1; 82 CREDENTIALS cred; 83 Key_schedule schedule; 84 extern char *krb_realmofhost(); 85 #ifdef CRYPT 86 int doencrypt = 0; 87 #define OPTIONS "dfKk:prtx" 88 #else 89 #define OPTIONS "dfKk:prt" 90 #endif 91 #else 92 #define OPTIONS "dfprt" 93 #endif 94 95 struct passwd *pwd; 96 u_short port; 97 uid_t userid; 98 int errs, rem; 99 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 100 101 #define CMDNEEDS 64 102 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 103 104 #ifdef KERBEROS 105 int kerberos __P((char **, char *, char *, char *)); 106 void oldw __P((const char *, ...)); 107 #endif 108 int response __P((void)); 109 void rsource __P((char *, struct stat *)); 110 void sink __P((int, char *[])); 111 void source __P((int, char *[])); 112 void tolocal __P((int, char *[])); 113 void toremote __P((char *, int, char *[])); 114 void usage __P((void)); 115 int main __P((int, char *[])); 116 117 int 118 main(argc, argv) 119 int argc; 120 char *argv[]; 121 { 122 struct servent *sp; 123 int ch, fflag, tflag; 124 char *targ, *shell; 125 126 fflag = tflag = 0; 127 while ((ch = getopt(argc, argv, OPTIONS)) != EOF) 128 switch(ch) { /* User-visible flags. */ 129 case 'K': 130 #ifdef KERBEROS 131 use_kerberos = 0; 132 #endif 133 break; 134 #ifdef KERBEROS 135 case 'k': 136 dest_realm = dst_realm_buf; 137 (void)strncpy(dst_realm_buf, optarg, REALM_SZ); 138 break; 139 #ifdef CRYPT 140 case 'x': 141 doencrypt = 1; 142 /* des_set_key(cred.session, schedule); */ 143 break; 144 #endif 145 #endif 146 case 'p': 147 pflag = 1; 148 break; 149 case 'r': 150 iamrecursive = 1; 151 break; 152 /* Server options. */ 153 case 'd': 154 targetshouldbedirectory = 1; 155 break; 156 case 'f': /* "from" */ 157 iamremote = 1; 158 fflag = 1; 159 break; 160 case 't': /* "to" */ 161 iamremote = 1; 162 tflag = 1; 163 break; 164 case '?': 165 default: 166 usage(); 167 } 168 argc -= optind; 169 argv += optind; 170 171 #ifdef KERBEROS 172 if (use_kerberos) { 173 #ifdef CRYPT 174 shell = doencrypt ? "ekshell" : "kshell"; 175 #else 176 shell = "kshell"; 177 #endif 178 if ((sp = getservbyname(shell, "tcp")) == NULL) { 179 use_kerberos = 0; 180 oldw("can't get entry for %s/tcp service", shell); 181 sp = getservbyname(shell = "shell", "tcp"); 182 } 183 } else 184 sp = getservbyname(shell = "shell", "tcp"); 185 #else 186 sp = getservbyname(shell = "shell", "tcp"); 187 #endif 188 if (sp == NULL) 189 errx(1, "%s/tcp: unknown service", shell); 190 port = sp->s_port; 191 192 if ((pwd = getpwuid(userid = getuid())) == NULL) 193 errx(1, "unknown user %d", (int)userid); 194 195 rem = STDIN_FILENO; /* XXX */ 196 197 if (fflag) { /* Follow "protocol", send data. */ 198 (void)response(); 199 source(argc, argv); 200 exit(errs); 201 } 202 203 if (tflag) { /* Receive data. */ 204 sink(argc, argv); 205 exit(errs); 206 } 207 208 if (argc < 2) 209 usage(); 210 if (argc > 2) 211 targetshouldbedirectory = 1; 212 213 rem = -1; 214 /* Command to be executed on remote system using "rsh". */ 215 #ifdef KERBEROS 216 (void)snprintf(cmd, sizeof(cmd), 217 "rcp%s%s%s%s", iamrecursive ? " -r" : "", 218 #ifdef CRYPT 219 (doencrypt && use_kerberos ? " -x" : ""), 220 #else 221 "", 222 #endif 223 pflag ? " -p" : "", targetshouldbedirectory ? " -d" : ""); 224 #else 225 (void)snprintf(cmd, sizeof(cmd), "rcp%s%s%s", 226 iamrecursive ? " -r" : "", pflag ? " -p" : "", 227 targetshouldbedirectory ? " -d" : ""); 228 #endif 229 230 (void)signal(SIGPIPE, lostconn); 231 232 if ((targ = colon(argv[argc - 1])) != NULL)/* Dest is remote host. */ 233 toremote(targ, argc, argv); 234 else { 235 tolocal(argc, argv); /* Dest is local host. */ 236 if (targetshouldbedirectory) 237 verifydir(argv[argc - 1]); 238 } 239 exit(errs); 240 } 241 242 void 243 toremote(targ, argc, argv) 244 char *targ, *argv[]; 245 int argc; 246 { 247 int i, len; 248 char *bp, *host, *src, *suser, *thost, *tuser, *name; 249 250 *targ++ = 0; 251 if (*targ == 0) 252 targ = "."; 253 254 if ((thost = strchr(argv[argc - 1], '@')) != NULL) { 255 /* user@host */ 256 *thost++ = 0; 257 tuser = argv[argc - 1]; 258 if (*tuser == '\0') 259 tuser = NULL; 260 else if (!okname(tuser)) 261 exit(1); 262 } else { 263 thost = argv[argc - 1]; 264 tuser = NULL; 265 } 266 267 for (i = 0; i < argc - 1; i++) { 268 src = colon(argv[i]); 269 if (src) { /* remote to remote */ 270 *src++ = 0; 271 if (*src == 0) 272 src = "."; 273 host = strchr(argv[i], '@'); 274 len = strlen(_PATH_RSH) + strlen(argv[i]) + 275 strlen(src) + (tuser ? strlen(tuser) : 0) + 276 strlen(thost) + strlen(targ) + CMDNEEDS + 20; 277 if (!(bp = malloc(len))) 278 err(1, "%s", ""); 279 if (host) { 280 *host++ = 0; 281 suser = argv[i]; 282 if (*suser == '\0') 283 suser = pwd->pw_name; 284 else if (!okname(suser)) 285 continue; 286 (void)snprintf(bp, len, 287 "%s %s -l %s -n %s %s '%s%s%s:%s'", 288 _PATH_RSH, host, suser, cmd, src, 289 tuser ? tuser : "", tuser ? "@" : "", 290 thost, targ); 291 } else 292 (void)snprintf(bp, len, 293 "exec %s %s -n %s %s '%s%s%s:%s'", 294 _PATH_RSH, argv[i], cmd, src, 295 tuser ? tuser : "", tuser ? "@" : "", 296 thost, targ); 297 (void)susystem(bp); 298 (void)free(bp); 299 } else { /* local to remote */ 300 if (rem == -1) { 301 len = strlen(targ) + CMDNEEDS + 20; 302 if (!(bp = malloc(len))) 303 err(1, "%s", ""); 304 (void)snprintf(bp, len, "%s -t %s", cmd, targ); 305 host = thost; 306 if ((name = strdup(pwd->pw_name)) == NULL) 307 err(1, "%s", ""); 308 #ifdef KERBEROS 309 if (use_kerberos) 310 rem = kerberos(&host, bp, name, 311 tuser ? tuser : name); 312 else 313 #endif 314 rem = rcmd(&host, port, name, 315 tuser ? tuser : name, 316 bp, 0); 317 if (rem < 0) 318 exit(1); 319 if (response() < 0) 320 exit(1); 321 (void)free(bp); 322 (void)free(name); 323 } 324 source(1, argv+i); 325 } 326 } 327 } 328 329 void 330 tolocal(argc, argv) 331 int argc; 332 char *argv[]; 333 { 334 int i, len; 335 char *bp, *host, *src, *suser; 336 337 for (i = 0; i < argc - 1; i++) { 338 if (!(src = colon(argv[i]))) { /* Local to local. */ 339 len = strlen(_PATH_CP) + strlen(argv[i]) + 340 strlen(argv[argc - 1]) + 20; 341 if (!(bp = malloc(len))) 342 err(1, "%s", ""); 343 (void)snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP, 344 iamrecursive ? " -r" : "", pflag ? " -p" : "", 345 argv[i], argv[argc - 1]); 346 if (susystem(bp)) 347 ++errs; 348 (void)free(bp); 349 continue; 350 } 351 *src++ = 0; 352 if (*src == 0) 353 src = "."; 354 if ((host = strchr(argv[i], '@')) == NULL) { 355 host = argv[i]; 356 suser = pwd->pw_name; 357 } else { 358 *host++ = 0; 359 suser = argv[i]; 360 if (*suser == '\0') 361 suser = pwd->pw_name; 362 else if (!okname(suser)) 363 continue; 364 } 365 len = strlen(src) + CMDNEEDS + 20; 366 if ((bp = malloc(len)) == NULL) 367 err(1, "%s", ""); 368 (void)snprintf(bp, len, "%s -f %s", cmd, src); 369 rem = 370 #ifdef KERBEROS 371 use_kerberos ? 372 kerberos(&host, bp, pwd->pw_name, suser) : 373 #endif 374 rcmd(&host, port, pwd->pw_name, suser, bp, 0); 375 (void)free(bp); 376 if (rem < 0) { 377 ++errs; 378 continue; 379 } 380 sink(1, argv + argc - 1); 381 (void)close(rem); 382 rem = -1; 383 } 384 } 385 386 void 387 source(argc, argv) 388 int argc; 389 char *argv[]; 390 { 391 struct stat stb; 392 static BUF buffer; 393 BUF *bp; 394 off_t i; 395 int amt, fd, haderr, indx, result; 396 char *last, *name, buf[BUFSIZ]; 397 398 for (indx = 0; indx < argc; ++indx) { 399 name = argv[indx]; 400 if ((fd = open(name, O_RDONLY, 0)) < 0) 401 goto syserr; 402 if (fstat(fd, &stb)) { 403 syserr: run_err("%s: %s", name, strerror(errno)); 404 goto next; 405 } 406 switch (stb.st_mode & S_IFMT) { 407 case S_IFREG: 408 break; 409 case S_IFDIR: 410 if (iamrecursive) { 411 rsource(name, &stb); 412 goto next; 413 } 414 /* FALLTHROUGH */ 415 default: 416 run_err("%s: not a regular file", name); 417 goto next; 418 } 419 if ((last = strrchr(name, '/')) == NULL) 420 last = name; 421 else 422 ++last; 423 if (pflag) { 424 /* 425 * Make it compatible with possible future 426 * versions expecting microseconds. 427 */ 428 (void)snprintf(buf, sizeof(buf), "T%ld 0 %ld 0\n", 429 stb.st_mtimespec.tv_sec, stb.st_atimespec.tv_sec); 430 (void)write(rem, buf, strlen(buf)); 431 if (response() < 0) 432 goto next; 433 } 434 #define MODEMASK (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO) 435 (void)snprintf(buf, sizeof(buf), "C%04o %qd %s\n", 436 stb.st_mode & MODEMASK, stb.st_size, last); 437 (void)write(rem, buf, strlen(buf)); 438 if (response() < 0) 439 goto next; 440 if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) { 441 next: (void)close(fd); 442 continue; 443 } 444 445 /* Keep writing after an error so that we stay sync'd up. */ 446 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 447 amt = bp->cnt; 448 if (i + amt > stb.st_size) 449 amt = stb.st_size - i; 450 if (!haderr) { 451 result = read(fd, bp->buf, amt); 452 if (result != amt) 453 haderr = result >= 0 ? EIO : errno; 454 } 455 if (haderr) 456 (void)write(rem, bp->buf, amt); 457 else { 458 result = write(rem, bp->buf, amt); 459 if (result != amt) 460 haderr = result >= 0 ? EIO : errno; 461 } 462 } 463 if (close(fd) && !haderr) 464 haderr = errno; 465 if (!haderr) 466 (void)write(rem, "", 1); 467 else 468 run_err("%s: %s", name, strerror(haderr)); 469 (void)response(); 470 } 471 } 472 473 void 474 rsource(name, statp) 475 char *name; 476 struct stat *statp; 477 { 478 DIR *dirp; 479 struct dirent *dp; 480 char *last, *vect[1], path[MAXPATHLEN]; 481 482 if (!(dirp = opendir(name))) { 483 run_err("%s: %s", name, strerror(errno)); 484 return; 485 } 486 last = strrchr(name, '/'); 487 if (last == 0) 488 last = name; 489 else 490 last++; 491 if (pflag) { 492 (void)snprintf(path, sizeof(path), "T%ld 0 %ld 0\n", 493 statp->st_mtimespec.tv_sec, statp->st_atimespec.tv_sec); 494 (void)write(rem, path, strlen(path)); 495 if (response() < 0) { 496 closedir(dirp); 497 return; 498 } 499 } 500 (void)snprintf(path, sizeof(path), 501 "D%04o %d %s\n", statp->st_mode & MODEMASK, 0, last); 502 (void)write(rem, path, strlen(path)); 503 if (response() < 0) { 504 closedir(dirp); 505 return; 506 } 507 while ((dp = readdir(dirp)) != NULL) { 508 if (dp->d_ino == 0) 509 continue; 510 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 511 continue; 512 if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) { 513 run_err("%s/%s: name too long", name, dp->d_name); 514 continue; 515 } 516 (void)snprintf(path, sizeof(path), "%s/%s", name, dp->d_name); 517 vect[0] = path; 518 source(1, vect); 519 } 520 (void)closedir(dirp); 521 (void)write(rem, "E\n", 2); 522 (void)response(); 523 } 524 525 void 526 sink(argc, argv) 527 int argc; 528 char *argv[]; 529 { 530 static BUF buffer; 531 struct stat stb; 532 struct timeval tv[2]; 533 enum { YES, NO, DISPLAYED } wrerr; 534 BUF *bp; 535 off_t i, j; 536 int amt, count, exists, first, mask, mode, ofd, omode; 537 int setimes, size, targisdir; 538 int wrerrno = 0; /* pacify gcc */ 539 char ch, *cp, *np, *targ, *why, *vect[1], buf[BUFSIZ]; 540 541 #define atime tv[0] 542 #define mtime tv[1] 543 #define SCREWUP(str) { why = str; goto screwup; } 544 545 setimes = targisdir = 0; 546 mask = umask(0); 547 if (!pflag) 548 (void)umask(mask); 549 if (argc != 1) { 550 run_err("ambiguous target"); 551 exit(1); 552 } 553 targ = *argv; 554 if (targetshouldbedirectory) 555 verifydir(targ); 556 (void)write(rem, "", 1); 557 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 558 targisdir = 1; 559 for (first = 1;; first = 0) { 560 cp = buf; 561 if (read(rem, cp, 1) <= 0) 562 return; 563 if (*cp++ == '\n') 564 SCREWUP("unexpected <newline>"); 565 do { 566 if (read(rem, &ch, sizeof(ch)) != sizeof(ch)) 567 SCREWUP("lost connection"); 568 *cp++ = ch; 569 } while (cp < &buf[BUFSIZ - 1] && ch != '\n'); 570 *cp = 0; 571 572 if (buf[0] == '\01' || buf[0] == '\02') { 573 if (iamremote == 0) 574 (void)write(STDERR_FILENO, 575 buf + 1, strlen(buf + 1)); 576 if (buf[0] == '\02') 577 exit(1); 578 ++errs; 579 continue; 580 } 581 if (buf[0] == 'E') { 582 (void)write(rem, "", 1); 583 return; 584 } 585 586 if (ch == '\n') 587 *--cp = 0; 588 589 #define getnum(t) (t) = 0; while (isdigit(*cp)) (t) = (t) * 10 + (*cp++ - '0'); 590 cp = buf; 591 if (*cp == 'T') { 592 setimes++; 593 cp++; 594 getnum(mtime.tv_sec); 595 if (*cp++ != ' ') 596 SCREWUP("mtime.sec not delimited"); 597 getnum(mtime.tv_usec); 598 if (*cp++ != ' ') 599 SCREWUP("mtime.usec not delimited"); 600 getnum(atime.tv_sec); 601 if (*cp++ != ' ') 602 SCREWUP("atime.sec not delimited"); 603 getnum(atime.tv_usec); 604 if (*cp++ != '\0') 605 SCREWUP("atime.usec not delimited"); 606 (void)write(rem, "", 1); 607 continue; 608 } 609 if (*cp != 'C' && *cp != 'D') { 610 /* 611 * Check for the case "rcp remote:foo\* local:bar". 612 * In this case, the line "No match." can be returned 613 * by the shell before the rcp command on the remote is 614 * executed so the ^Aerror_message convention isn't 615 * followed. 616 */ 617 if (first) { 618 run_err("%s", cp); 619 exit(1); 620 } 621 SCREWUP("expected control record"); 622 } 623 mode = 0; 624 for (++cp; cp < buf + 5; cp++) { 625 if (*cp < '0' || *cp > '7') 626 SCREWUP("bad mode"); 627 mode = (mode << 3) | (*cp - '0'); 628 } 629 if (*cp++ != ' ') 630 SCREWUP("mode not delimited"); 631 632 for (size = 0; isdigit(*cp);) 633 size = size * 10 + (*cp++ - '0'); 634 if (*cp++ != ' ') 635 SCREWUP("size not delimited"); 636 if (targisdir) { 637 static char *namebuf; 638 static int cursize; 639 size_t need; 640 641 need = strlen(targ) + strlen(cp) + 250; 642 if (need > cursize) { 643 if (!(namebuf = malloc(need))) 644 run_err("%s", strerror(errno)); 645 } 646 (void)snprintf(namebuf, need, "%s%s%s", targ, 647 *targ ? "/" : "", cp); 648 np = namebuf; 649 } else 650 np = targ; 651 exists = stat(np, &stb) == 0; 652 if (buf[0] == 'D') { 653 int mod_flag = pflag; 654 if (exists) { 655 if (!S_ISDIR(stb.st_mode)) { 656 errno = ENOTDIR; 657 goto bad; 658 } 659 if (pflag) 660 (void)chmod(np, mode); 661 } else { 662 /* Handle copying from a read-only directory */ 663 mod_flag = 1; 664 if (mkdir(np, mode | S_IRWXU) < 0) 665 goto bad; 666 } 667 vect[0] = np; 668 sink(1, vect); 669 if (setimes) { 670 setimes = 0; 671 if (utimes(np, tv) < 0) 672 run_err("%s: set times: %s", 673 np, strerror(errno)); 674 } 675 if (mod_flag) 676 (void)chmod(np, mode); 677 continue; 678 } 679 omode = mode; 680 mode |= S_IWRITE; 681 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 682 bad: run_err("%s: %s", np, strerror(errno)); 683 continue; 684 } 685 (void)write(rem, "", 1); 686 if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) { 687 (void)close(ofd); 688 continue; 689 } 690 cp = bp->buf; 691 wrerr = NO; 692 for (count = i = 0; i < size; i += BUFSIZ) { 693 amt = BUFSIZ; 694 if (i + amt > size) 695 amt = size - i; 696 count += amt; 697 do { 698 j = read(rem, cp, amt); 699 if (j <= 0) { 700 run_err("%s", j ? strerror(errno) : 701 "dropped connection"); 702 exit(1); 703 } 704 amt -= j; 705 cp += j; 706 } while (amt > 0); 707 if (count == bp->cnt) { 708 /* Keep reading so we stay sync'd up. */ 709 if (wrerr == NO) { 710 j = write(ofd, bp->buf, count); 711 if (j != count) { 712 wrerr = YES; 713 wrerrno = j >= 0 ? EIO : errno; 714 } 715 } 716 count = 0; 717 cp = bp->buf; 718 } 719 } 720 if (count != 0 && wrerr == NO && 721 (j = write(ofd, bp->buf, count)) != count) { 722 wrerr = YES; 723 wrerrno = j >= 0 ? EIO : errno; 724 } 725 if (ftruncate(ofd, size)) { 726 run_err("%s: truncate: %s", np, strerror(errno)); 727 wrerr = DISPLAYED; 728 } 729 if (pflag) { 730 if (exists || omode != mode) 731 if (fchmod(ofd, omode)) 732 run_err("%s: set mode: %s", 733 np, strerror(errno)); 734 } else { 735 if (!exists && omode != mode) 736 if (fchmod(ofd, omode & ~mask)) 737 run_err("%s: set mode: %s", 738 np, strerror(errno)); 739 } 740 (void)close(ofd); 741 (void)response(); 742 if (setimes && wrerr == NO) { 743 setimes = 0; 744 if (utimes(np, tv) < 0) { 745 run_err("%s: set times: %s", 746 np, strerror(errno)); 747 wrerr = DISPLAYED; 748 } 749 } 750 switch(wrerr) { 751 case YES: 752 run_err("%s: %s", np, strerror(wrerrno)); 753 break; 754 case NO: 755 (void)write(rem, "", 1); 756 break; 757 case DISPLAYED: 758 break; 759 } 760 } 761 screwup: 762 run_err("protocol error: %s", why); 763 exit(1); 764 } 765 766 #ifdef KERBEROS 767 int 768 kerberos(host, bp, locuser, user) 769 char **host, *bp, *locuser, *user; 770 { 771 struct servent *sp; 772 773 again: 774 if (use_kerberos) { 775 rem = KSUCCESS; 776 errno = 0; 777 if (dest_realm == NULL) 778 dest_realm = krb_realmofhost(*host); 779 rem = 780 #ifdef CRYPT 781 doencrypt ? 782 krcmd_mutual(host, 783 port, user, bp, 0, dest_realm, &cred, schedule) : 784 #endif 785 krcmd(host, port, user, bp, 0, dest_realm); 786 787 if (rem < 0) { 788 use_kerberos = 0; 789 if ((sp = getservbyname("shell", "tcp")) == NULL) 790 errx(1, "unknown service shell/tcp"); 791 if (errno == ECONNREFUSED) 792 oldw("remote host doesn't support Kerberos"); 793 else if (errno == ENOENT) 794 oldw("can't provide Kerberos authentication data"); 795 port = sp->s_port; 796 goto again; 797 } 798 } else { 799 #ifdef CRYPT 800 if (doencrypt) 801 errx(1, 802 "the -x option requires Kerberos authentication"); 803 #endif 804 rem = rcmd(host, port, locuser, user, bp, 0); 805 } 806 return (rem); 807 } 808 #endif /* KERBEROS */ 809 810 int 811 response() 812 { 813 char ch, *cp, resp, rbuf[BUFSIZ]; 814 815 if (read(rem, &resp, sizeof(resp)) != sizeof(resp)) 816 lostconn(0); 817 818 cp = rbuf; 819 switch(resp) { 820 case 0: /* ok */ 821 return (0); 822 default: 823 *cp++ = resp; 824 /* FALLTHROUGH */ 825 case 1: /* error, followed by error msg */ 826 case 2: /* fatal error, "" */ 827 do { 828 if (read(rem, &ch, sizeof(ch)) != sizeof(ch)) 829 lostconn(0); 830 *cp++ = ch; 831 } while (cp < &rbuf[BUFSIZ] && ch != '\n'); 832 833 if (!iamremote) 834 (void)write(STDERR_FILENO, rbuf, cp - rbuf); 835 ++errs; 836 if (resp == 1) 837 return (-1); 838 exit(1); 839 } 840 /* NOTREACHED */ 841 } 842 843 void 844 usage() 845 { 846 #ifdef KERBEROS 847 #ifdef CRYPT 848 (void)fprintf(stderr, "%s\n\t%s\n", 849 "usage: rcp [-Kpx] [-k realm] f1 f2", 850 "or: rcp [-Kprx] [-k realm] f1 ... fn directory"); 851 #else 852 (void)fprintf(stderr, "%s\n\t%s\n", 853 "usage: rcp [-Kp] [-k realm] f1 f2", 854 "or: rcp [-Kpr] [-k realm] f1 ... fn directory"); 855 #endif 856 #else 857 (void)fprintf(stderr, 858 "usage: rcp [-p] f1 f2; or: rcp [-pr] f1 ... fn directory\n"); 859 #endif 860 exit(1); 861 } 862 863 #if __STDC__ 864 #include <stdarg.h> 865 #else 866 #include <varargs.h> 867 #endif 868 869 #ifdef KERBEROS 870 void 871 #if __STDC__ 872 oldw(const char *fmt, ...) 873 #else 874 oldw(fmt, va_alist) 875 char *fmt; 876 va_dcl 877 #endif 878 { 879 va_list ap; 880 #if __STDC__ 881 va_start(ap, fmt); 882 #else 883 va_start(ap); 884 #endif 885 (void)fprintf(stderr, "rcp: "); 886 (void)vfprintf(stderr, fmt, ap); 887 (void)fprintf(stderr, ", using standard rcp\n"); 888 va_end(ap); 889 } 890 #endif 891 892 void 893 #if __STDC__ 894 run_err(const char *fmt, ...) 895 #else 896 run_err(fmt, va_alist) 897 char *fmt; 898 va_dcl 899 #endif 900 { 901 static FILE *fp; 902 va_list ap; 903 #if __STDC__ 904 va_start(ap, fmt); 905 #else 906 va_start(ap); 907 #endif 908 909 ++errs; 910 if (fp == NULL && !(fp = fdopen(rem, "w"))) 911 return; 912 (void)fprintf(fp, "%c", 0x01); 913 (void)fprintf(fp, "rcp: "); 914 (void)vfprintf(fp, fmt, ap); 915 (void)fprintf(fp, "\n"); 916 (void)fflush(fp); 917 918 if (!iamremote) 919 vwarnx(fmt, ap); 920 921 va_end(ap); 922 } 923
Indexes created Wed Oct 01 15:09:59 GMT 2025