1 /* $NetBSD: rcp.c,v 1.50 2020/05/06 18:15:40 aymeric 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. 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 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1983, 1990, 1992, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)rcp.c 8.2 (Berkeley) 4/2/94"; 41 #else 42 __RCSID("$NetBSD: rcp.c,v 1.50 2020/05/06 18:15:40 aymeric Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/stat.h> 48 #include <sys/time.h> 49 #include <sys/socket.h> 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> 52 #include <netinet/ip.h> 53 54 #include <ctype.h> 55 #include <dirent.h> 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <locale.h> 60 #include <netdb.h> 61 #include <pwd.h> 62 #include <signal.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 68 #include "pathnames.h" 69 #include "extern.h" 70 71 #define OPTIONS "46dfprt" 72 73 struct passwd *pwd; 74 char *pwname; 75 u_short port; 76 uid_t userid; 77 int errs, rem; 78 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 79 int family = AF_UNSPEC; 80 static char dot[] = "."; 81 82 #define CMDNEEDS 64 83 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 84 85 int response(void); 86 void rsource(char *, struct stat *); 87 void sink(int, char *[]); 88 void source(int, char *[]); 89 void tolocal(int, char *[]); 90 void toremote(char *, int, char *[]); 91 void usage(void); 92 93 int 94 main(int argc, char *argv[]) 95 { 96 struct servent *sp; 97 int ch, fflag, tflag; 98 char *targ; 99 const char *shell; 100 101 setprogname(argv[0]); 102 (void)setlocale(LC_ALL, ""); 103 104 fflag = tflag = 0; 105 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 106 switch(ch) { /* User-visible flags. */ 107 case '4': 108 family = AF_INET; 109 break; 110 case '6': 111 family = AF_INET6; 112 break; 113 case 'K': 114 break; 115 case 'p': 116 pflag = 1; 117 break; 118 case 'r': 119 iamrecursive = 1; 120 break; 121 /* Server options. */ 122 case 'd': 123 targetshouldbedirectory = 1; 124 break; 125 case 'f': /* "from" */ 126 iamremote = 1; 127 fflag = 1; 128 break; 129 case 't': /* "to" */ 130 iamremote = 1; 131 tflag = 1; 132 break; 133 case '?': 134 default: 135 usage(); 136 } 137 argc -= optind; 138 argv += optind; 139 140 sp = getservbyname(shell = "shell", "tcp"); 141 if (sp == NULL) 142 errx(1, "%s/tcp: unknown service", shell); 143 port = sp->s_port; 144 145 if ((pwd = getpwuid(userid = getuid())) == NULL) 146 errx(1, "unknown user %d", (int)userid); 147 148 if ((pwname = strdup(pwd->pw_name)) == NULL) 149 err(1, NULL); 150 151 rem = STDIN_FILENO; /* XXX */ 152 153 if (fflag) { /* Follow "protocol", send data. */ 154 (void)response(); 155 source(argc, argv); 156 exit(errs); 157 } 158 159 if (tflag) { /* Receive data. */ 160 sink(argc, argv); 161 exit(errs); 162 } 163 164 if (argc < 2) 165 usage(); 166 if (argc > 2) 167 targetshouldbedirectory = 1; 168 169 rem = -1; 170 /* Command to be executed on remote system using "rsh". */ 171 (void)snprintf(cmd, sizeof(cmd), "rcp%s%s%s", 172 iamrecursive ? " -r" : "", pflag ? " -p" : "", 173 targetshouldbedirectory ? " -d" : ""); 174 175 (void)signal(SIGPIPE, lostconn); 176 177 if ((targ = colon(argv[argc - 1])) != NULL)/* Dest is remote host. */ 178 toremote(targ, argc, argv); 179 else { 180 tolocal(argc, argv); /* Dest is local host. */ 181 if (targetshouldbedirectory) 182 verifydir(argv[argc - 1]); 183 } 184 exit(errs); 185 /* NOTREACHED */ 186 } 187 188 void 189 toremote(char *targ, int argc, char *argv[]) 190 { 191 int i; 192 size_t len; 193 char *bp, *host, *src, *suser, *thost, *tuser; 194 195 *targ++ = 0; 196 if (*targ == 0) 197 targ = dot; 198 199 if ((thost = strchr(argv[argc - 1], '@')) != NULL) { 200 /* user@host */ 201 *thost++ = 0; 202 tuser = argv[argc - 1]; 203 if (*tuser == '\0') 204 tuser = NULL; 205 else if (!okname(tuser)) 206 exit(1); 207 } else { 208 thost = argv[argc - 1]; 209 tuser = NULL; 210 } 211 thost = unbracket(thost); 212 213 for (i = 0; i < argc - 1; i++) { 214 src = colon(argv[i]); 215 if (src) { /* remote to remote */ 216 *src++ = 0; 217 if (*src == 0) 218 src = dot; 219 host = strchr(argv[i], '@'); 220 len = strlen(_PATH_RSH) + strlen(argv[i]) + 221 strlen(src) + (tuser ? strlen(tuser) : 0) + 222 strlen(thost) + strlen(targ) + CMDNEEDS + 20; 223 if (!(bp = malloc(len))) 224 err(1, NULL); 225 if (host) { 226 *host++ = 0; 227 host = unbracket(host); 228 suser = argv[i]; 229 if (*suser == '\0') 230 suser = pwname; 231 else if (!okname(suser)) { 232 (void)free(bp); 233 continue; 234 } 235 (void)snprintf(bp, len, 236 "%s %s -l %s -n %s %s '%s%s%s:%s'", 237 _PATH_RSH, host, suser, cmd, src, 238 tuser ? tuser : "", tuser ? "@" : "", 239 thost, targ); 240 } else { 241 host = unbracket(argv[i]); 242 (void)snprintf(bp, len, 243 "exec %s %s -n %s %s '%s%s%s:%s'", 244 _PATH_RSH, argv[i], cmd, src, 245 tuser ? tuser : "", tuser ? "@" : "", 246 thost, targ); 247 } 248 (void)susystem(bp); 249 (void)free(bp); 250 } else { /* local to remote */ 251 if (rem == -1) { 252 len = strlen(targ) + CMDNEEDS + 20; 253 if (!(bp = malloc(len))) 254 err(1, NULL); 255 (void)snprintf(bp, len, "%s -t %s", cmd, targ); 256 host = thost; 257 rem = rcmd_af(&host, port, pwname, 258 tuser ? tuser : pwname, 259 bp, NULL, family); 260 if (rem < 0) 261 exit(1); 262 if (response() < 0) 263 exit(1); 264 (void)free(bp); 265 } 266 source(1, argv+i); 267 } 268 } 269 } 270 271 void 272 tolocal(int argc, char *argv[]) 273 { 274 int i; 275 size_t len; 276 char *bp, *host, *src, *suser; 277 278 for (i = 0; i < argc - 1; i++) { 279 if (!(src = colon(argv[i]))) { /* Local to local. */ 280 len = strlen(_PATH_CP) + strlen(argv[i]) + 281 strlen(argv[argc - 1]) + 20; 282 if (!(bp = malloc(len))) 283 err(1, NULL); 284 (void)snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP, 285 iamrecursive ? " -r" : "", pflag ? " -p" : "", 286 argv[i], argv[argc - 1]); 287 if (susystem(bp)) 288 ++errs; 289 (void)free(bp); 290 continue; 291 } 292 *src++ = 0; 293 if (*src == 0) 294 src = dot; 295 if ((host = strchr(argv[i], '@')) == NULL) { 296 host = argv[i]; 297 suser = pwname; 298 } else { 299 *host++ = 0; 300 suser = argv[i]; 301 if (*suser == '\0') 302 suser = pwname; 303 else if (!okname(suser)) 304 continue; 305 } 306 host = unbracket(host); 307 len = strlen(src) + CMDNEEDS + 20; 308 if ((bp = malloc(len)) == NULL) 309 err(1, NULL); 310 (void)snprintf(bp, len, "%s -f %s", cmd, src); 311 rem = 312 rcmd_af(&host, port, pwname, suser, bp, NULL, family); 313 (void)free(bp); 314 if (rem < 0) { 315 ++errs; 316 continue; 317 } 318 sink(1, argv + argc - 1); 319 (void)close(rem); 320 rem = -1; 321 } 322 } 323 324 void 325 source(int argc, char *argv[]) 326 { 327 struct stat stb; 328 static BUF buffer; 329 BUF *bp; 330 off_t i; 331 off_t amt; 332 int fd, haderr, indx, result; 333 char *last, *name, buf[BUFSIZ]; 334 335 for (indx = 0; indx < argc; ++indx) { 336 name = argv[indx]; 337 if ((fd = open(name, O_RDONLY, 0)) < 0) 338 goto syserr; 339 if (fstat(fd, &stb)) { 340 syserr: run_err("%s: %s", name, strerror(errno)); 341 goto next; 342 } 343 switch (stb.st_mode & S_IFMT) { 344 case S_IFREG: 345 break; 346 case S_IFDIR: 347 if (iamrecursive) { 348 rsource(name, &stb); 349 goto next; 350 } 351 /* FALLTHROUGH */ 352 default: 353 run_err("%s: not a regular file", name); 354 goto next; 355 } 356 if ((last = strrchr(name, '/')) == NULL) 357 last = name; 358 else 359 ++last; 360 if (pflag) { 361 /* 362 * Make it compatible with possible future 363 * versions expecting microseconds. 364 */ 365 (void)snprintf(buf, sizeof(buf), "T%lld %ld %lld %ld\n", 366 (long long)stb.st_mtimespec.tv_sec, 367 (long)stb.st_mtimespec.tv_nsec / 1000, 368 (long long)stb.st_atimespec.tv_sec, 369 (long)stb.st_atimespec.tv_nsec / 1000); 370 (void)write(rem, buf, strlen(buf)); 371 if (response() < 0) 372 goto next; 373 } 374 #define RCPMODEMASK (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO) 375 (void)snprintf(buf, sizeof(buf), "C%04o %lld %s\n", 376 stb.st_mode & RCPMODEMASK, (long long)stb.st_size, last); 377 (void)write(rem, buf, strlen(buf)); 378 if (response() < 0) 379 goto next; 380 if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) { 381 next: (void)close(fd); 382 continue; 383 } 384 385 /* Keep writing after an error so that we stay sync'd up. */ 386 haderr = 0; 387 for (i = 0; i < stb.st_size; i += bp->cnt) { 388 amt = bp->cnt; 389 if (i + amt > stb.st_size) 390 amt = stb.st_size - i; 391 if (!haderr) { 392 result = read(fd, bp->buf, (size_t)amt); 393 if (result != amt) 394 haderr = result >= 0 ? EIO : errno; 395 } 396 if (haderr) 397 (void)write(rem, bp->buf, (size_t)amt); 398 else { 399 result = write(rem, bp->buf, (size_t)amt); 400 if (result != amt) 401 haderr = result >= 0 ? EIO : errno; 402 } 403 } 404 if (close(fd) && !haderr) 405 haderr = errno; 406 if (!haderr) 407 (void)write(rem, "", 1); 408 else 409 run_err("%s: %s", name, strerror(haderr)); 410 (void)response(); 411 } 412 } 413 414 void 415 rsource(char *name, struct stat *statp) 416 { 417 DIR *dirp; 418 struct dirent *dp; 419 char *last, *vect[1], path[MAXPATHLEN]; 420 421 if (!(dirp = opendir(name))) { 422 run_err("%s: %s", name, strerror(errno)); 423 return; 424 } 425 last = strrchr(name, '/'); 426 if (last == 0) 427 last = name; 428 else 429 last++; 430 if (pflag) { 431 (void)snprintf(path, sizeof(path), "T%lld %ld %lld %ld\n", 432 (long long)statp->st_mtimespec.tv_sec, 433 (long)statp->st_mtimespec.tv_nsec / 1000, 434 (long long)statp->st_atimespec.tv_sec, 435 (long)statp->st_atimespec.tv_nsec / 1000); 436 (void)write(rem, path, strlen(path)); 437 if (response() < 0) { 438 (void)closedir(dirp); 439 return; 440 } 441 } 442 (void)snprintf(path, sizeof(path), 443 "D%04o %d %s\n", statp->st_mode & RCPMODEMASK, 0, last); 444 (void)write(rem, path, strlen(path)); 445 if (response() < 0) { 446 (void)closedir(dirp); 447 return; 448 } 449 while ((dp = readdir(dirp)) != NULL) { 450 if (dp->d_ino == 0) 451 continue; 452 if (!strcmp(dp->d_name, dot) || !strcmp(dp->d_name, "..")) 453 continue; 454 if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) { 455 run_err("%s/%s: name too long", name, dp->d_name); 456 continue; 457 } 458 (void)snprintf(path, sizeof(path), "%s/%s", name, dp->d_name); 459 vect[0] = path; 460 source(1, vect); 461 } 462 (void)closedir(dirp); 463 (void)write(rem, "E\n", 2); 464 (void)response(); 465 } 466 467 void 468 sink(int argc, char *argv[]) 469 { 470 static BUF buffer; 471 struct stat stb; 472 struct timeval tv[2]; 473 BUF *bp; 474 ssize_t j; 475 off_t i; 476 off_t amt; 477 off_t count; 478 int exists, first, ofd; 479 mode_t mask; 480 mode_t mode; 481 mode_t omode; 482 int setimes, targisdir, wrerr; 483 int wrerrno = 0; /* pacify gcc */ 484 const char *wrcontext = NULL; 485 char ch, *cp, *np, *targ, *vect[1], buf[BUFSIZ]; 486 const char *why; 487 off_t size; 488 char *namebuf = NULL; 489 size_t cursize = 0; 490 491 #define atime tv[0] 492 #define mtime tv[1] 493 #define SCREWUP(str) { why = str; goto screwup; } 494 495 setimes = targisdir = 0; 496 mask = umask(0); 497 if (!pflag) 498 (void)umask(mask); 499 if (argc != 1) { 500 run_err("ambiguous target"); 501 exit(1); 502 } 503 targ = *argv; 504 if (targetshouldbedirectory) 505 verifydir(targ); 506 (void)write(rem, "", 1); 507 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 508 targisdir = 1; 509 for (first = 1;; first = 0) { 510 cp = buf; 511 if (read(rem, cp, 1) <= 0) 512 goto out; 513 if (*cp++ == '\n') 514 SCREWUP("unexpected <newline>"); 515 do { 516 if (read(rem, &ch, sizeof(ch)) != sizeof(ch)) 517 SCREWUP("lost connection"); 518 *cp++ = ch; 519 } while (cp < &buf[BUFSIZ - 1] && ch != '\n'); 520 *cp = 0; 521 522 if (buf[0] == '\01' || buf[0] == '\02') { 523 if (iamremote == 0) 524 (void)write(STDERR_FILENO, 525 buf + 1, strlen(buf + 1)); 526 if (buf[0] == '\02') 527 exit(1); 528 ++errs; 529 continue; 530 } 531 if (buf[0] == 'E') { 532 (void)write(rem, "", 1); 533 goto out; 534 } 535 536 if (ch == '\n') 537 *--cp = 0; 538 539 #define getnum(t) (t) = 0; while (isdigit((unsigned char)*cp)) (t) = (t) * 10 + (*cp++ - '0'); 540 cp = buf; 541 if (*cp == 'T') { 542 setimes++; 543 cp++; 544 getnum(mtime.tv_sec); 545 if (*cp++ != ' ') 546 SCREWUP("mtime.sec not delimited"); 547 getnum(mtime.tv_usec); 548 if (*cp++ != ' ') 549 SCREWUP("mtime.usec not delimited"); 550 getnum(atime.tv_sec); 551 if (*cp++ != ' ') 552 SCREWUP("atime.sec not delimited"); 553 getnum(atime.tv_usec); 554 if (*cp++ != '\0') 555 SCREWUP("atime.usec not delimited"); 556 (void)write(rem, "", 1); 557 continue; 558 } 559 if (*cp != 'C' && *cp != 'D') { 560 /* 561 * Check for the case "rcp remote:foo\* local:bar". 562 * In this case, the line "No match." can be returned 563 * by the shell before the rcp command on the remote is 564 * executed so the ^Aerror_message convention isn't 565 * followed. 566 */ 567 if (first) { 568 run_err("%s", cp); 569 exit(1); 570 } 571 SCREWUP("expected control record"); 572 } 573 mode = 0; 574 for (++cp; cp < buf + 5; cp++) { 575 if (*cp < '0' || *cp > '7') 576 SCREWUP("bad mode"); 577 mode = (mode << 3) | (*cp - '0'); 578 } 579 if (*cp++ != ' ') 580 SCREWUP("mode not delimited"); 581 582 for (size = 0; isdigit((unsigned char)*cp);) 583 size = size * 10 + (*cp++ - '0'); 584 if (*cp++ != ' ') 585 SCREWUP("size not delimited"); 586 if (targisdir) { 587 char *newnamebuf; 588 size_t need; 589 590 need = strlen(targ) + strlen(cp) + 2; 591 if (need > cursize) { 592 need += 256; 593 newnamebuf = realloc(namebuf, need); 594 if (newnamebuf != NULL) { 595 namebuf = newnamebuf; 596 cursize = need; 597 } else { 598 run_err("%s", strerror(errno)); 599 exit(1); 600 } 601 } 602 (void)snprintf(namebuf, cursize, "%s%s%s", targ, 603 *targ ? "/" : "", cp); 604 np = namebuf; 605 } else 606 np = targ; 607 exists = stat(np, &stb) == 0; 608 if (buf[0] == 'D') { 609 int mod_flag = pflag; 610 if (exists) { 611 if (!S_ISDIR(stb.st_mode)) { 612 errno = ENOTDIR; 613 goto bad; 614 } 615 if (pflag) 616 (void)chmod(np, mode); 617 } else { 618 /* Handle copying from a read-only directory */ 619 mod_flag = 1; 620 if (mkdir(np, mode | S_IRWXU) < 0) 621 goto bad; 622 } 623 vect[0] = np; 624 sink(1, vect); 625 if (setimes) { 626 setimes = 0; 627 (void) utimes(np, tv); 628 } 629 if (mod_flag) 630 (void)chmod(np, mode); 631 continue; 632 } 633 omode = mode; 634 mode |= S_IWRITE; 635 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 636 bad: run_err("%s: %s", np, strerror(errno)); 637 continue; 638 } 639 (void)write(rem, "", 1); 640 if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) { 641 (void)close(ofd); 642 continue; 643 } 644 cp = bp->buf; 645 wrerr = 0; 646 647 /* 648 * Like run_err(), but don't send any message to the remote end. 649 * Instead, record the first error and send that in the end. 650 */ 651 #define RUN_ERR(w_context) do { \ 652 if (!wrerr) { \ 653 wrerrno = errno; \ 654 wrcontext = w_context; \ 655 wrerr = 1; \ 656 } \ 657 } while(0) 658 659 count = 0; 660 for (i = 0; i < size; i += BUFSIZ) { 661 amt = BUFSIZ; 662 if (i + amt > size) 663 amt = size - i; 664 count += amt; 665 do { 666 j = read(rem, cp, (size_t)amt); 667 if (j == -1) { 668 run_err("%s", j ? strerror(errno) : 669 "dropped connection"); 670 exit(1); 671 } 672 amt -= j; 673 cp += j; 674 } while (amt > 0); 675 if (count == bp->cnt) { 676 /* Keep reading so we stay sync'd up. */ 677 if (!wrerr) { 678 j = write(ofd, bp->buf, (size_t)count); 679 if (j != count) { 680 if (j >= 0) 681 errno = EIO; 682 RUN_ERR("write"); 683 } 684 } 685 count = 0; 686 cp = bp->buf; 687 } 688 } 689 if (count != 0 && !wrerr && 690 (j = write(ofd, bp->buf, (size_t)count)) != count) { 691 if (j >= 0) 692 errno = EIO; 693 RUN_ERR("write"); 694 } 695 if (ftruncate(ofd, size)) 696 RUN_ERR("truncate"); 697 698 if (pflag) { 699 if (exists || omode != mode) 700 if (fchmod(ofd, omode)) 701 RUN_ERR("set mode"); 702 } else { 703 if (!exists && omode != mode) 704 if (fchmod(ofd, omode & ~mask)) 705 RUN_ERR("set mode"); 706 } 707 #ifndef __SVR4 708 if (setimes && !wrerr) { 709 setimes = 0; 710 if (futimes(ofd, tv) < 0) 711 RUN_ERR("set times"); 712 } 713 #endif 714 (void)close(ofd); 715 #ifdef __SVR4 716 if (setimes && !wrerr) { 717 setimes = 0; 718 if (utimes(np, tv) < 0) 719 RUN_ERR("set times"); 720 } 721 #endif 722 (void)response(); 723 if (wrerr) 724 run_err("%s: %s: %s", np, wrcontext, strerror(wrerrno)); 725 else 726 (void)write(rem, "", 1); 727 } 728 729 out: 730 if (namebuf) { 731 free(namebuf); 732 } 733 return; 734 735 screwup: 736 run_err("protocol error: %s", why); 737 exit(1); 738 /* NOTREACHED */ 739 } 740 741 742 int 743 response(void) 744 { 745 char ch, *cp, resp, rbuf[BUFSIZ]; 746 747 if (read(rem, &resp, sizeof(resp)) != sizeof(resp)) 748 lostconn(0); 749 750 cp = rbuf; 751 switch(resp) { 752 case 0: /* ok */ 753 return (0); 754 default: 755 *cp++ = resp; 756 /* FALLTHROUGH */ 757 case 1: /* error, followed by error msg */ 758 case 2: /* fatal error, "" */ 759 do { 760 if (read(rem, &ch, sizeof(ch)) != sizeof(ch)) 761 lostconn(0); 762 *cp++ = ch; 763 } while (cp < &rbuf[BUFSIZ] && ch != '\n'); 764 765 if (!iamremote) 766 (void)write(STDERR_FILENO, rbuf, (size_t)(cp - rbuf)); 767 ++errs; 768 if (resp == 1) 769 return (-1); 770 exit(1); 771 } 772 /* NOTREACHED */ 773 } 774 775 void 776 usage(void) 777 { 778 (void)fprintf(stderr, 779 "usage: rcp [-46p] f1 f2; or: rcp [-46pr] f1 ... fn directory\n"); 780 exit(1); 781 /* NOTREACHED */ 782 } 783 784 #include <stdarg.h> 785 786 787 void 788 run_err(const char *fmt, ...) 789 { 790 static FILE *fp; 791 va_list ap; 792 793 ++errs; 794 if (fp == NULL && !(fp = fdopen(rem, "w"))) 795 return; 796 797 va_start(ap, fmt); 798 799 (void)fprintf(fp, "%c", 0x01); 800 (void)fprintf(fp, "rcp: "); 801 (void)vfprintf(fp, fmt, ap); 802 (void)fprintf(fp, "\n"); 803 (void)fflush(fp); 804 va_end(ap); 805 806 if (!iamremote) { 807 va_start(ap, fmt); 808 vwarnx(fmt, ap); 809 va_end(ap); 810 } 811 } 812