1 /* $OpenBSD: scp.c,v 1.247 2022/03/20 08:52:17 djm Exp $ */ 2 /* 3 * scp - secure remote copy. This is basically patched BSD rcp which 4 * uses ssh to do the data transfer (instead of using rcmd). 5 * 6 * NOTE: This version should NOT be suid root. (This uses ssh to 7 * do the transfer and ssh has the necessary privileges.) 8 * 9 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 10 * 11 * As far as I am concerned, the code I have written for this software 12 * can be used freely for any purpose. Any derived versions of this 13 * software must be clearly marked as such, and if the derived work is 14 * incompatible with the protocol description in the RFC file, it must be 15 * called by a name other than "ssh" or "Secure Shell". 16 */ 17 /* 18 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 19 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Parts from: 44 * 45 * Copyright (c) 1983, 1990, 1992, 1993, 1995 46 * The Regents of the University of California. All rights reserved. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 */ 73 74 #include <sys/types.h> 75 #include <sys/poll.h> 76 #include <sys/wait.h> 77 #include <sys/stat.h> 78 #include <sys/time.h> 79 #include <sys/uio.h> 80 81 #include <ctype.h> 82 #include <dirent.h> 83 #include <errno.h> 84 #include <fcntl.h> 85 #include <fnmatch.h> 86 #include <glob.h> 87 #include <libgen.h> 88 #include <locale.h> 89 #include <pwd.h> 90 #include <signal.h> 91 #include <stdarg.h> 92 #include <stdint.h> 93 #include <stdio.h> 94 #include <stdlib.h> 95 #include <string.h> 96 #include <time.h> 97 #include <unistd.h> 98 #include <limits.h> 99 #include <vis.h> 100 101 #include "xmalloc.h" 102 #include "ssh.h" 103 #include "atomicio.h" 104 #include "pathnames.h" 105 #include "log.h" 106 #include "misc.h" 107 #include "progressmeter.h" 108 #include "utf8.h" 109 #include "sftp.h" 110 111 #include "sftp-common.h" 112 #include "sftp-client.h" 113 114 #define COPY_BUFLEN 16384 115 116 int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *); 117 int do_cmd2(char *, char *, int, char *, int, int); 118 119 /* Struct for addargs */ 120 arglist args; 121 arglist remote_remote_args; 122 123 /* Bandwidth limit */ 124 long long limit_kbps = 0; 125 struct bwlimit bwlimit; 126 127 /* Name of current file being transferred. */ 128 char *curfile; 129 130 /* This is set to non-zero to enable verbose mode. */ 131 int verbose_mode = 0; 132 LogLevel log_level = SYSLOG_LEVEL_INFO; 133 134 /* This is set to zero if the progressmeter is not desired. */ 135 int showprogress = 1; 136 137 /* 138 * This is set to non-zero if remote-remote copy should be piped 139 * through this process. 140 */ 141 int throughlocal = 1; 142 143 /* Non-standard port to use for the ssh connection or -1. */ 144 int sshport = -1; 145 146 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 147 char *ssh_program = _PATH_SSH_PROGRAM; 148 149 /* This is used to store the pid of ssh_program */ 150 pid_t do_cmd_pid = -1; 151 pid_t do_cmd_pid2 = -1; 152 153 /* Needed for sftp */ 154 volatile sig_atomic_t interrupted = 0; 155 156 int remote_glob(struct sftp_conn *, const char *, int, 157 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ 158 159 static void 160 killchild(int signo) 161 { 162 if (do_cmd_pid > 1) { 163 kill(do_cmd_pid, signo ? signo : SIGTERM); 164 waitpid(do_cmd_pid, NULL, 0); 165 } 166 if (do_cmd_pid2 > 1) { 167 kill(do_cmd_pid2, signo ? signo : SIGTERM); 168 waitpid(do_cmd_pid2, NULL, 0); 169 } 170 171 if (signo) 172 _exit(1); 173 exit(1); 174 } 175 176 static void 177 suspone(int pid, int signo) 178 { 179 int status; 180 181 if (pid > 1) { 182 kill(pid, signo); 183 while (waitpid(pid, &status, WUNTRACED) == -1 && 184 errno == EINTR) 185 ; 186 } 187 } 188 189 static void 190 suspchild(int signo) 191 { 192 suspone(do_cmd_pid, signo); 193 suspone(do_cmd_pid2, signo); 194 kill(getpid(), SIGSTOP); 195 } 196 197 static int 198 do_local_cmd(arglist *a) 199 { 200 u_int i; 201 int status; 202 pid_t pid; 203 204 if (a->num == 0) 205 fatal("do_local_cmd: no arguments"); 206 207 if (verbose_mode) { 208 fprintf(stderr, "Executing:"); 209 for (i = 0; i < a->num; i++) 210 fmprintf(stderr, " %s", a->list[i]); 211 fprintf(stderr, "\n"); 212 } 213 if ((pid = fork()) == -1) 214 fatal("do_local_cmd: fork: %s", strerror(errno)); 215 216 if (pid == 0) { 217 execvp(a->list[0], a->list); 218 perror(a->list[0]); 219 exit(1); 220 } 221 222 do_cmd_pid = pid; 223 ssh_signal(SIGTERM, killchild); 224 ssh_signal(SIGINT, killchild); 225 ssh_signal(SIGHUP, killchild); 226 227 while (waitpid(pid, &status, 0) == -1) 228 if (errno != EINTR) 229 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 230 231 do_cmd_pid = -1; 232 233 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 234 return (-1); 235 236 return (0); 237 } 238 239 /* 240 * This function executes the given command as the specified user on the 241 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 242 * assigns the input and output file descriptors on success. 243 */ 244 245 int 246 do_cmd(char *program, char *host, char *remuser, int port, int subsystem, 247 char *cmd, int *fdin, int *fdout, pid_t *pid) 248 { 249 int pin[2], pout[2], reserved[2]; 250 251 if (verbose_mode) 252 fmprintf(stderr, 253 "Executing: program %s host %s, user %s, command %s\n", 254 program, host, 255 remuser ? remuser : "(unspecified)", cmd); 256 257 if (port == -1) 258 port = sshport; 259 260 /* 261 * Reserve two descriptors so that the real pipes won't get 262 * descriptors 0 and 1 because that will screw up dup2 below. 263 */ 264 if (pipe(reserved) == -1) 265 fatal("pipe: %s", strerror(errno)); 266 267 /* Create a socket pair for communicating with ssh. */ 268 if (pipe(pin) == -1) 269 fatal("pipe: %s", strerror(errno)); 270 if (pipe(pout) == -1) 271 fatal("pipe: %s", strerror(errno)); 272 273 /* Free the reserved descriptors. */ 274 close(reserved[0]); 275 close(reserved[1]); 276 277 ssh_signal(SIGTSTP, suspchild); 278 ssh_signal(SIGTTIN, suspchild); 279 ssh_signal(SIGTTOU, suspchild); 280 281 /* Fork a child to execute the command on the remote host using ssh. */ 282 *pid = fork(); 283 if (*pid == 0) { 284 /* Child. */ 285 close(pin[1]); 286 close(pout[0]); 287 dup2(pin[0], 0); 288 dup2(pout[1], 1); 289 close(pin[0]); 290 close(pout[1]); 291 292 replacearg(&args, 0, "%s", program); 293 if (port != -1) { 294 addargs(&args, "-p"); 295 addargs(&args, "%d", port); 296 } 297 if (remuser != NULL) { 298 addargs(&args, "-l"); 299 addargs(&args, "%s", remuser); 300 } 301 if (subsystem) 302 addargs(&args, "-s"); 303 addargs(&args, "--"); 304 addargs(&args, "%s", host); 305 addargs(&args, "%s", cmd); 306 307 execvp(program, args.list); 308 perror(program); 309 exit(1); 310 } else if (*pid == -1) { 311 fatal("fork: %s", strerror(errno)); 312 } 313 /* Parent. Close the other side, and return the local side. */ 314 close(pin[0]); 315 *fdout = pin[1]; 316 close(pout[1]); 317 *fdin = pout[0]; 318 ssh_signal(SIGTERM, killchild); 319 ssh_signal(SIGINT, killchild); 320 ssh_signal(SIGHUP, killchild); 321 return 0; 322 } 323 324 /* 325 * This function executes a command similar to do_cmd(), but expects the 326 * input and output descriptors to be setup by a previous call to do_cmd(). 327 * This way the input and output of two commands can be connected. 328 */ 329 int 330 do_cmd2(char *host, char *remuser, int port, char *cmd, 331 int fdin, int fdout) 332 { 333 int status; 334 pid_t pid; 335 336 if (verbose_mode) 337 fmprintf(stderr, 338 "Executing: 2nd program %s host %s, user %s, command %s\n", 339 ssh_program, host, 340 remuser ? remuser : "(unspecified)", cmd); 341 342 if (port == -1) 343 port = sshport; 344 345 /* Fork a child to execute the command on the remote host using ssh. */ 346 pid = fork(); 347 if (pid == 0) { 348 dup2(fdin, 0); 349 dup2(fdout, 1); 350 351 replacearg(&args, 0, "%s", ssh_program); 352 if (port != -1) { 353 addargs(&args, "-p"); 354 addargs(&args, "%d", port); 355 } 356 if (remuser != NULL) { 357 addargs(&args, "-l"); 358 addargs(&args, "%s", remuser); 359 } 360 addargs(&args, "-oBatchMode=yes"); 361 addargs(&args, "--"); 362 addargs(&args, "%s", host); 363 addargs(&args, "%s", cmd); 364 365 execvp(ssh_program, args.list); 366 perror(ssh_program); 367 exit(1); 368 } else if (pid == -1) { 369 fatal("fork: %s", strerror(errno)); 370 } 371 while (waitpid(pid, &status, 0) == -1) 372 if (errno != EINTR) 373 fatal("do_cmd2: waitpid: %s", strerror(errno)); 374 return 0; 375 } 376 377 typedef struct { 378 size_t cnt; 379 char *buf; 380 } BUF; 381 382 BUF *allocbuf(BUF *, int, int); 383 void lostconn(int); 384 int okname(char *); 385 void run_err(const char *,...) 386 __attribute__((__format__ (printf, 1, 2))) 387 __attribute__((__nonnull__ (1))); 388 int note_err(const char *,...) 389 __attribute__((__format__ (printf, 1, 2))); 390 void verifydir(char *); 391 392 struct passwd *pwd; 393 uid_t userid; 394 int errs, remin, remout, remin2, remout2; 395 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 396 397 #define CMDNEEDS 64 398 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 399 400 enum scp_mode_e { 401 MODE_SCP, 402 MODE_SFTP 403 }; 404 405 int response(void); 406 void rsource(char *, struct stat *); 407 void sink(int, char *[], const char *); 408 void source(int, char *[]); 409 void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); 410 void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); 411 void usage(void); 412 413 void source_sftp(int, char *, char *, struct sftp_conn *); 414 void sink_sftp(int, char *, const char *, struct sftp_conn *); 415 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, 416 char *, char *); 417 418 int 419 main(int argc, char **argv) 420 { 421 int ch, fflag, tflag, status, n; 422 char **newargv, *argv0; 423 const char *errstr; 424 extern char *optarg; 425 extern int optind; 426 enum scp_mode_e mode = MODE_SFTP; 427 char *sftp_direct = NULL; 428 429 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 430 sanitise_stdfd(); 431 432 setlocale(LC_CTYPE, ""); 433 434 /* Copy argv, because we modify it */ 435 argv0 = argv[0]; 436 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 437 for (n = 0; n < argc; n++) 438 newargv[n] = xstrdup(argv[n]); 439 argv = newargv; 440 441 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 442 443 memset(&args, '\0', sizeof(args)); 444 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 445 args.list = remote_remote_args.list = NULL; 446 addargs(&args, "%s", ssh_program); 447 addargs(&args, "-x"); 448 addargs(&args, "-oPermitLocalCommand=no"); 449 addargs(&args, "-oClearAllForwardings=yes"); 450 addargs(&args, "-oRemoteCommand=none"); 451 addargs(&args, "-oRequestTTY=no"); 452 453 fflag = Tflag = tflag = 0; 454 while ((ch = getopt(argc, argv, 455 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:")) != -1) { 456 switch (ch) { 457 /* User-visible flags. */ 458 case '1': 459 fatal("SSH protocol v.1 is no longer supported"); 460 break; 461 case '2': 462 /* Ignored */ 463 break; 464 case 'A': 465 case '4': 466 case '6': 467 case 'C': 468 addargs(&args, "-%c", ch); 469 addargs(&remote_remote_args, "-%c", ch); 470 break; 471 case 'D': 472 sftp_direct = optarg; 473 break; 474 case '3': 475 throughlocal = 1; 476 break; 477 case 'R': 478 throughlocal = 0; 479 break; 480 case 'o': 481 case 'c': 482 case 'i': 483 case 'F': 484 case 'J': 485 addargs(&remote_remote_args, "-%c", ch); 486 addargs(&remote_remote_args, "%s", optarg); 487 addargs(&args, "-%c", ch); 488 addargs(&args, "%s", optarg); 489 break; 490 case 'O': 491 mode = MODE_SCP; 492 break; 493 case 's': 494 mode = MODE_SFTP; 495 break; 496 case 'P': 497 sshport = a2port(optarg); 498 if (sshport <= 0) 499 fatal("bad port \"%s\"\n", optarg); 500 break; 501 case 'B': 502 addargs(&remote_remote_args, "-oBatchmode=yes"); 503 addargs(&args, "-oBatchmode=yes"); 504 break; 505 case 'l': 506 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 507 &errstr); 508 if (errstr != NULL) 509 usage(); 510 limit_kbps *= 1024; /* kbps */ 511 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 512 break; 513 case 'p': 514 pflag = 1; 515 break; 516 case 'r': 517 iamrecursive = 1; 518 break; 519 case 'S': 520 ssh_program = xstrdup(optarg); 521 break; 522 case 'v': 523 addargs(&args, "-v"); 524 addargs(&remote_remote_args, "-v"); 525 if (verbose_mode == 0) 526 log_level = SYSLOG_LEVEL_DEBUG1; 527 else if (log_level < SYSLOG_LEVEL_DEBUG3) 528 log_level++; 529 verbose_mode = 1; 530 break; 531 case 'q': 532 addargs(&args, "-q"); 533 addargs(&remote_remote_args, "-q"); 534 showprogress = 0; 535 break; 536 537 /* Server options. */ 538 case 'd': 539 targetshouldbedirectory = 1; 540 break; 541 case 'f': /* "from" */ 542 iamremote = 1; 543 fflag = 1; 544 break; 545 case 't': /* "to" */ 546 iamremote = 1; 547 tflag = 1; 548 break; 549 case 'T': 550 Tflag = 1; 551 break; 552 default: 553 usage(); 554 } 555 } 556 argc -= optind; 557 argv += optind; 558 559 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 560 561 /* Do this last because we want the user to be able to override it */ 562 addargs(&args, "-oForwardAgent=no"); 563 564 if (iamremote) 565 mode = MODE_SCP; 566 567 if ((pwd = getpwuid(userid = getuid())) == NULL) 568 fatal("unknown user %u", (u_int) userid); 569 570 if (!isatty(STDOUT_FILENO)) 571 showprogress = 0; 572 573 if (pflag) { 574 /* Cannot pledge: -p allows setuid/setgid files... */ 575 } else { 576 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 577 NULL) == -1) { 578 perror("pledge"); 579 exit(1); 580 } 581 } 582 583 remin = STDIN_FILENO; 584 remout = STDOUT_FILENO; 585 586 if (fflag) { 587 /* Follow "protocol", send data. */ 588 (void) response(); 589 source(argc, argv); 590 exit(errs != 0); 591 } 592 if (tflag) { 593 /* Receive data. */ 594 sink(argc, argv, NULL); 595 exit(errs != 0); 596 } 597 if (argc < 2) 598 usage(); 599 if (argc > 2) 600 targetshouldbedirectory = 1; 601 602 remin = remout = -1; 603 do_cmd_pid = -1; 604 /* Command to be executed on remote system using "ssh". */ 605 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 606 verbose_mode ? " -v" : "", 607 iamrecursive ? " -r" : "", pflag ? " -p" : "", 608 targetshouldbedirectory ? " -d" : ""); 609 610 (void) ssh_signal(SIGPIPE, lostconn); 611 612 if (colon(argv[argc - 1])) /* Dest is remote host. */ 613 toremote(argc, argv, mode, sftp_direct); 614 else { 615 if (targetshouldbedirectory) 616 verifydir(argv[argc - 1]); 617 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */ 618 } 619 /* 620 * Finally check the exit status of the ssh process, if one was forked 621 * and no error has occurred yet 622 */ 623 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) { 624 if (remin != -1) 625 (void) close(remin); 626 if (remout != -1) 627 (void) close(remout); 628 if (waitpid(do_cmd_pid, &status, 0) == -1) 629 errs = 1; 630 else { 631 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 632 errs = 1; 633 } 634 } 635 exit(errs != 0); 636 } 637 638 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 639 static int 640 scpio(void *_cnt, size_t s) 641 { 642 off_t *cnt = (off_t *)_cnt; 643 644 *cnt += s; 645 refresh_progress_meter(0); 646 if (limit_kbps > 0) 647 bandwidth_limit(&bwlimit, s); 648 return 0; 649 } 650 651 static int 652 do_times(int fd, int verb, const struct stat *sb) 653 { 654 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 655 char buf[(20 + 7 + 2) * 2 + 2]; 656 657 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 658 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 659 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 660 if (verb) { 661 fprintf(stderr, "File mtime %lld atime %lld\n", 662 (long long)sb->st_mtime, (long long)sb->st_atime); 663 fprintf(stderr, "Sending file timestamps: %s", buf); 664 } 665 (void) atomicio(vwrite, fd, buf, strlen(buf)); 666 return (response()); 667 } 668 669 static int 670 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 671 char **pathp) 672 { 673 int r; 674 675 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 676 if (r == 0 && *pathp == NULL) 677 *pathp = xstrdup("."); 678 return r; 679 } 680 681 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 682 static int 683 append(char *cp, char ***ap, size_t *np) 684 { 685 char **tmp; 686 687 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 688 return -1; 689 tmp[(*np)] = cp; 690 (*np)++; 691 *ap = tmp; 692 return 0; 693 } 694 695 /* 696 * Finds the start and end of the first brace pair in the pattern. 697 * returns 0 on success or -1 for invalid patterns. 698 */ 699 static int 700 find_brace(const char *pattern, int *startp, int *endp) 701 { 702 int i; 703 int in_bracket, brace_level; 704 705 *startp = *endp = -1; 706 in_bracket = brace_level = 0; 707 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 708 switch (pattern[i]) { 709 case '\\': 710 /* skip next character */ 711 if (pattern[i + 1] != '\0') 712 i++; 713 break; 714 case '[': 715 in_bracket = 1; 716 break; 717 case ']': 718 in_bracket = 0; 719 break; 720 case '{': 721 if (in_bracket) 722 break; 723 if (pattern[i + 1] == '}') { 724 /* Protect a single {}, for find(1), like csh */ 725 i++; /* skip */ 726 break; 727 } 728 if (*startp == -1) 729 *startp = i; 730 brace_level++; 731 break; 732 case '}': 733 if (in_bracket) 734 break; 735 if (*startp < 0) { 736 /* Unbalanced brace */ 737 return -1; 738 } 739 if (--brace_level <= 0) 740 *endp = i; 741 break; 742 } 743 } 744 /* unbalanced brackets/braces */ 745 if (*endp < 0 && (*startp >= 0 || in_bracket)) 746 return -1; 747 return 0; 748 } 749 750 /* 751 * Assembles and records a successfully-expanded pattern, returns -1 on 752 * alloc failure. 753 */ 754 static int 755 emit_expansion(const char *pattern, int brace_start, int brace_end, 756 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 757 { 758 char *cp; 759 int o = 0, tail_len = strlen(pattern + brace_end + 1); 760 761 if ((cp = malloc(brace_start + (sel_end - sel_start) + 762 tail_len + 1)) == NULL) 763 return -1; 764 765 /* Pattern before initial brace */ 766 if (brace_start > 0) { 767 memcpy(cp, pattern, brace_start); 768 o = brace_start; 769 } 770 /* Current braced selection */ 771 if (sel_end - sel_start > 0) { 772 memcpy(cp + o, pattern + sel_start, 773 sel_end - sel_start); 774 o += sel_end - sel_start; 775 } 776 /* Remainder of pattern after closing brace */ 777 if (tail_len > 0) { 778 memcpy(cp + o, pattern + brace_end + 1, tail_len); 779 o += tail_len; 780 } 781 cp[o] = '\0'; 782 if (append(cp, patternsp, npatternsp) != 0) { 783 free(cp); 784 return -1; 785 } 786 return 0; 787 } 788 789 /* 790 * Expand the first encountered brace in pattern, appending the expanded 791 * patterns it yielded to the *patternsp array. 792 * 793 * Returns 0 on success or -1 on allocation failure. 794 * 795 * Signals whether expansion was performed via *expanded and whether 796 * pattern was invalid via *invalid. 797 */ 798 static int 799 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 800 int *expanded, int *invalid) 801 { 802 int i; 803 int in_bracket, brace_start, brace_end, brace_level; 804 int sel_start, sel_end; 805 806 *invalid = *expanded = 0; 807 808 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 809 *invalid = 1; 810 return 0; 811 } else if (brace_start == -1) 812 return 0; 813 814 in_bracket = brace_level = 0; 815 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 816 switch (pattern[i]) { 817 case '{': 818 if (in_bracket) 819 break; 820 brace_level++; 821 break; 822 case '}': 823 if (in_bracket) 824 break; 825 brace_level--; 826 break; 827 case '[': 828 in_bracket = 1; 829 break; 830 case ']': 831 in_bracket = 0; 832 break; 833 case '\\': 834 if (i < brace_end - 1) 835 i++; /* skip */ 836 break; 837 } 838 if (pattern[i] == ',' || i == brace_end - 1) { 839 if (in_bracket || brace_level > 0) 840 continue; 841 /* End of a selection, emit an expanded pattern */ 842 843 /* Adjust end index for last selection */ 844 sel_end = (i == brace_end - 1) ? brace_end : i; 845 if (emit_expansion(pattern, brace_start, brace_end, 846 sel_start, sel_end, patternsp, npatternsp) != 0) 847 return -1; 848 /* move on to the next selection */ 849 sel_start = i + 1; 850 continue; 851 } 852 } 853 if (in_bracket || brace_level > 0) { 854 *invalid = 1; 855 return 0; 856 } 857 /* success */ 858 *expanded = 1; 859 return 0; 860 } 861 862 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 863 static int 864 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 865 { 866 char *cp, *cp2, **active = NULL, **done = NULL; 867 size_t i, nactive = 0, ndone = 0; 868 int ret = -1, invalid = 0, expanded = 0; 869 870 *patternsp = NULL; 871 *npatternsp = 0; 872 873 /* Start the worklist with the original pattern */ 874 if ((cp = strdup(pattern)) == NULL) 875 return -1; 876 if (append(cp, &active, &nactive) != 0) { 877 free(cp); 878 return -1; 879 } 880 while (nactive > 0) { 881 cp = active[nactive - 1]; 882 nactive--; 883 if (brace_expand_one(cp, &active, &nactive, 884 &expanded, &invalid) == -1) { 885 free(cp); 886 goto fail; 887 } 888 if (invalid) 889 fatal_f("invalid brace pattern \"%s\"", cp); 890 if (expanded) { 891 /* 892 * Current entry expanded to new entries on the 893 * active list; discard the progenitor pattern. 894 */ 895 free(cp); 896 continue; 897 } 898 /* 899 * Pattern did not expand; append the finename component to 900 * the completed list 901 */ 902 if ((cp2 = strrchr(cp, '/')) != NULL) 903 *cp2++ = '\0'; 904 else 905 cp2 = cp; 906 if (append(xstrdup(cp2), &done, &ndone) != 0) { 907 free(cp); 908 goto fail; 909 } 910 free(cp); 911 } 912 /* success */ 913 *patternsp = done; 914 *npatternsp = ndone; 915 done = NULL; 916 ndone = 0; 917 ret = 0; 918 fail: 919 for (i = 0; i < nactive; i++) 920 free(active[i]); 921 free(active); 922 for (i = 0; i < ndone; i++) 923 free(done[i]); 924 free(done); 925 return ret; 926 } 927 928 static struct sftp_conn * 929 do_sftp_connect(char *host, char *user, int port, char *sftp_direct, 930 int *reminp, int *remoutp, int *pidp) 931 { 932 if (sftp_direct == NULL) { 933 if (do_cmd(ssh_program, host, user, port, 1, "sftp", 934 reminp, remoutp, pidp) < 0) 935 return NULL; 936 937 } else { 938 freeargs(&args); 939 addargs(&args, "sftp-server"); 940 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", 941 reminp, remoutp, pidp) < 0) 942 return NULL; 943 } 944 return do_init(*reminp, *remoutp, 32768, 64, limit_kbps); 945 } 946 947 void 948 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 949 { 950 char *suser = NULL, *host = NULL, *src = NULL; 951 char *bp, *tuser, *thost, *targ; 952 int sport = -1, tport = -1; 953 struct sftp_conn *conn = NULL, *conn2 = NULL; 954 arglist alist; 955 int i, r, status; 956 u_int j; 957 958 memset(&alist, '\0', sizeof(alist)); 959 alist.list = NULL; 960 961 /* Parse target */ 962 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 963 if (r == -1) { 964 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 965 ++errs; 966 goto out; 967 } 968 if (r != 0) { 969 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 970 &targ) == -1) { 971 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 972 ++errs; 973 goto out; 974 } 975 } 976 977 /* Parse source files */ 978 for (i = 0; i < argc - 1; i++) { 979 free(suser); 980 free(host); 981 free(src); 982 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 983 if (r == -1) { 984 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 985 ++errs; 986 continue; 987 } 988 if (r != 0) { 989 parse_user_host_path(argv[i], &suser, &host, &src); 990 } 991 if (suser != NULL && !okname(suser)) { 992 ++errs; 993 continue; 994 } 995 if (host && throughlocal) { /* extended remote to remote */ 996 if (mode == MODE_SFTP) { 997 if (remin == -1) { 998 /* Connect to dest now */ 999 conn = do_sftp_connect(thost, tuser, 1000 tport, sftp_direct, 1001 &remin, &remout, &do_cmd_pid); 1002 if (conn == NULL) { 1003 fatal("Unable to open " 1004 "destination connection"); 1005 } 1006 debug3_f("origin in %d out %d pid %ld", 1007 remin, remout, (long)do_cmd_pid); 1008 } 1009 /* 1010 * XXX remember suser/host/sport and only 1011 * reconnect if they change between arguments. 1012 * would save reconnections for cases like 1013 * scp -3 hosta:/foo hosta:/bar hostb: 1014 */ 1015 /* Connect to origin now */ 1016 conn2 = do_sftp_connect(host, suser, 1017 sport, sftp_direct, 1018 &remin2, &remout2, &do_cmd_pid2); 1019 if (conn2 == NULL) { 1020 fatal("Unable to open " 1021 "source connection"); 1022 } 1023 debug3_f("destination in %d out %d pid %ld", 1024 remin2, remout2, (long)do_cmd_pid2); 1025 throughlocal_sftp(conn2, conn, src, targ); 1026 (void) close(remin2); 1027 (void) close(remout2); 1028 remin2 = remout2 = -1; 1029 if (waitpid(do_cmd_pid2, &status, 0) == -1) 1030 ++errs; 1031 else if (!WIFEXITED(status) || 1032 WEXITSTATUS(status) != 0) 1033 ++errs; 1034 do_cmd_pid2 = -1; 1035 continue; 1036 } else { 1037 xasprintf(&bp, "%s -f %s%s", cmd, 1038 *src == '-' ? "-- " : "", src); 1039 if (do_cmd(ssh_program, host, suser, sport, 0, 1040 bp, &remin, &remout, &do_cmd_pid) < 0) 1041 exit(1); 1042 free(bp); 1043 xasprintf(&bp, "%s -t %s%s", cmd, 1044 *targ == '-' ? "-- " : "", targ); 1045 if (do_cmd2(thost, tuser, tport, bp, 1046 remin, remout) < 0) 1047 exit(1); 1048 free(bp); 1049 (void) close(remin); 1050 (void) close(remout); 1051 remin = remout = -1; 1052 } 1053 } else if (host) { /* standard remote to remote */ 1054 /* 1055 * Second remote user is passed to first remote side 1056 * via scp command-line. Ensure it contains no obvious 1057 * shell characters. 1058 */ 1059 if (tuser != NULL && !okname(tuser)) { 1060 ++errs; 1061 continue; 1062 } 1063 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 1064 /* This would require the remote support URIs */ 1065 fatal("target port not supported with two " 1066 "remote hosts and the -R option"); 1067 } 1068 1069 freeargs(&alist); 1070 addargs(&alist, "%s", ssh_program); 1071 addargs(&alist, "-x"); 1072 addargs(&alist, "-oClearAllForwardings=yes"); 1073 addargs(&alist, "-n"); 1074 for (j = 0; j < remote_remote_args.num; j++) { 1075 addargs(&alist, "%s", 1076 remote_remote_args.list[j]); 1077 } 1078 1079 if (sport != -1) { 1080 addargs(&alist, "-p"); 1081 addargs(&alist, "%d", sport); 1082 } 1083 if (suser) { 1084 addargs(&alist, "-l"); 1085 addargs(&alist, "%s", suser); 1086 } 1087 addargs(&alist, "--"); 1088 addargs(&alist, "%s", host); 1089 addargs(&alist, "%s", cmd); 1090 addargs(&alist, "%s", src); 1091 addargs(&alist, "%s%s%s:%s", 1092 tuser ? tuser : "", tuser ? "@" : "", 1093 thost, targ); 1094 if (do_local_cmd(&alist) != 0) 1095 errs = 1; 1096 } else { /* local to remote */ 1097 if (mode == MODE_SFTP) { 1098 if (remin == -1) { 1099 /* Connect to remote now */ 1100 conn = do_sftp_connect(thost, tuser, 1101 tport, sftp_direct, 1102 &remin, &remout, &do_cmd_pid); 1103 if (conn == NULL) { 1104 fatal("Unable to open sftp " 1105 "connection"); 1106 } 1107 } 1108 1109 /* The protocol */ 1110 source_sftp(1, argv[i], targ, conn); 1111 continue; 1112 } 1113 /* SCP */ 1114 if (remin == -1) { 1115 xasprintf(&bp, "%s -t %s%s", cmd, 1116 *targ == '-' ? "-- " : "", targ); 1117 if (do_cmd(ssh_program, thost, tuser, tport, 0, 1118 bp, &remin, &remout, &do_cmd_pid) < 0) 1119 exit(1); 1120 if (response() < 0) 1121 exit(1); 1122 free(bp); 1123 } 1124 source(1, argv + i); 1125 } 1126 } 1127 out: 1128 if (mode == MODE_SFTP) 1129 free(conn); 1130 free(tuser); 1131 free(thost); 1132 free(targ); 1133 free(suser); 1134 free(host); 1135 free(src); 1136 } 1137 1138 void 1139 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 1140 { 1141 char *bp, *host = NULL, *src = NULL, *suser = NULL; 1142 arglist alist; 1143 struct sftp_conn *conn = NULL; 1144 int i, r, sport = -1; 1145 1146 memset(&alist, '\0', sizeof(alist)); 1147 alist.list = NULL; 1148 1149 for (i = 0; i < argc - 1; i++) { 1150 free(suser); 1151 free(host); 1152 free(src); 1153 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1154 if (r == -1) { 1155 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1156 ++errs; 1157 continue; 1158 } 1159 if (r != 0) 1160 parse_user_host_path(argv[i], &suser, &host, &src); 1161 if (suser != NULL && !okname(suser)) { 1162 ++errs; 1163 continue; 1164 } 1165 if (!host) { /* Local to local. */ 1166 freeargs(&alist); 1167 addargs(&alist, "%s", _PATH_CP); 1168 if (iamrecursive) 1169 addargs(&alist, "-r"); 1170 if (pflag) 1171 addargs(&alist, "-p"); 1172 addargs(&alist, "--"); 1173 addargs(&alist, "%s", argv[i]); 1174 addargs(&alist, "%s", argv[argc-1]); 1175 if (do_local_cmd(&alist)) 1176 ++errs; 1177 continue; 1178 } 1179 /* Remote to local. */ 1180 if (mode == MODE_SFTP) { 1181 conn = do_sftp_connect(host, suser, sport, 1182 sftp_direct, &remin, &remout, &do_cmd_pid); 1183 if (conn == NULL) { 1184 error("sftp connection failed"); 1185 ++errs; 1186 continue; 1187 } 1188 1189 /* The protocol */ 1190 sink_sftp(1, argv[argc - 1], src, conn); 1191 1192 free(conn); 1193 (void) close(remin); 1194 (void) close(remout); 1195 remin = remout = -1; 1196 continue; 1197 } 1198 /* SCP */ 1199 xasprintf(&bp, "%s -f %s%s", 1200 cmd, *src == '-' ? "-- " : "", src); 1201 if (do_cmd(ssh_program, host, suser, sport, 0, bp, 1202 &remin, &remout, &do_cmd_pid) < 0) { 1203 free(bp); 1204 ++errs; 1205 continue; 1206 } 1207 free(bp); 1208 sink(1, argv + argc - 1, src); 1209 (void) close(remin); 1210 remin = remout = -1; 1211 } 1212 free(suser); 1213 free(host); 1214 free(src); 1215 } 1216 1217 /* Prepare remote path, handling ~ by assuming cwd is the homedir */ 1218 static char * 1219 prepare_remote_path(struct sftp_conn *conn, const char *path) 1220 { 1221 size_t nslash; 1222 1223 /* Handle ~ prefixed paths */ 1224 if (*path == '\0' || strcmp(path, "~") == 0) 1225 return xstrdup("."); 1226 if (*path != '~') 1227 return xstrdup(path); 1228 if (strncmp(path, "~/", 2) == 0) { 1229 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2)) 1230 return xstrdup("."); 1231 return xstrdup(path + 2 + nslash); 1232 } 1233 if (can_expand_path(conn)) 1234 return do_expand_path(conn, path); 1235 /* No protocol extension */ 1236 error("server expand-path extension is required " 1237 "for ~user paths in SFTP mode"); 1238 return NULL; 1239 } 1240 1241 void 1242 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) 1243 { 1244 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1245 int src_is_dir, target_is_dir; 1246 Attrib a; 1247 struct stat st; 1248 1249 memset(&a, '\0', sizeof(a)); 1250 if (stat(src, &st) != 0) 1251 fatal("stat local \"%s\": %s", src, strerror(errno)); 1252 src_is_dir = S_ISDIR(st.st_mode); 1253 if ((filename = basename(src)) == NULL) 1254 fatal("basename \"%s\": %s", src, strerror(errno)); 1255 1256 /* 1257 * No need to glob here - the local shell already took care of 1258 * the expansions 1259 */ 1260 if ((target = prepare_remote_path(conn, targ)) == NULL) 1261 cleanup_exit(255); 1262 target_is_dir = remote_is_dir(conn, target); 1263 if (targetshouldbedirectory && !target_is_dir) { 1264 debug("target directory \"%s\" does not exist", target); 1265 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS; 1266 a.perm = st.st_mode | 0700; /* ensure writable */ 1267 if (do_mkdir(conn, target, &a, 1) != 0) 1268 cleanup_exit(255); /* error already logged */ 1269 target_is_dir = 1; 1270 } 1271 if (target_is_dir) 1272 abs_dst = path_append(target, filename); 1273 else { 1274 abs_dst = target; 1275 target = NULL; 1276 } 1277 debug3_f("copying local %s to remote %s", src, abs_dst); 1278 1279 if (src_is_dir && iamrecursive) { 1280 if (upload_dir(conn, src, abs_dst, pflag, 1281 SFTP_PROGRESS_ONLY, 0, 0, 1) != 0) { 1282 error("failed to upload directory %s to %s", src, targ); 1283 errs = 1; 1284 } 1285 } else if (do_upload(conn, src, abs_dst, pflag, 0, 0) != 0) { 1286 error("failed to upload file %s to %s", src, targ); 1287 errs = 1; 1288 } 1289 1290 free(abs_dst); 1291 free(target); 1292 } 1293 1294 void 1295 source(int argc, char **argv) 1296 { 1297 struct stat stb; 1298 static BUF buffer; 1299 BUF *bp; 1300 off_t i, statbytes; 1301 size_t amt, nr; 1302 int fd = -1, haderr, indx; 1303 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1304 int len; 1305 1306 for (indx = 0; indx < argc; ++indx) { 1307 name = argv[indx]; 1308 statbytes = 0; 1309 len = strlen(name); 1310 while (len > 1 && name[len-1] == '/') 1311 name[--len] = '\0'; 1312 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1) 1313 goto syserr; 1314 if (strchr(name, '\n') != NULL) { 1315 strnvis(encname, name, sizeof(encname), VIS_NL); 1316 name = encname; 1317 } 1318 if (fstat(fd, &stb) == -1) { 1319 syserr: run_err("%s: %s", name, strerror(errno)); 1320 goto next; 1321 } 1322 if (stb.st_size < 0) { 1323 run_err("%s: %s", name, "Negative file size"); 1324 goto next; 1325 } 1326 unset_nonblock(fd); 1327 switch (stb.st_mode & S_IFMT) { 1328 case S_IFREG: 1329 break; 1330 case S_IFDIR: 1331 if (iamrecursive) { 1332 rsource(name, &stb); 1333 goto next; 1334 } 1335 /* FALLTHROUGH */ 1336 default: 1337 run_err("%s: not a regular file", name); 1338 goto next; 1339 } 1340 if ((last = strrchr(name, '/')) == NULL) 1341 last = name; 1342 else 1343 ++last; 1344 curfile = last; 1345 if (pflag) { 1346 if (do_times(remout, verbose_mode, &stb) < 0) 1347 goto next; 1348 } 1349 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1350 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1351 (u_int) (stb.st_mode & FILEMODEMASK), 1352 (long long)stb.st_size, last); 1353 if (verbose_mode) 1354 fmprintf(stderr, "Sending file modes: %s", buf); 1355 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1356 if (response() < 0) 1357 goto next; 1358 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1359 next: if (fd != -1) { 1360 (void) close(fd); 1361 fd = -1; 1362 } 1363 continue; 1364 } 1365 if (showprogress) 1366 start_progress_meter(curfile, stb.st_size, &statbytes); 1367 set_nonblock(remout); 1368 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1369 amt = bp->cnt; 1370 if (i + (off_t)amt > stb.st_size) 1371 amt = stb.st_size - i; 1372 if (!haderr) { 1373 if ((nr = atomicio(read, fd, 1374 bp->buf, amt)) != amt) { 1375 haderr = errno; 1376 memset(bp->buf + nr, 0, amt - nr); 1377 } 1378 } 1379 /* Keep writing after error to retain sync */ 1380 if (haderr) { 1381 (void)atomicio(vwrite, remout, bp->buf, amt); 1382 memset(bp->buf, 0, amt); 1383 continue; 1384 } 1385 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1386 &statbytes) != amt) 1387 haderr = errno; 1388 } 1389 unset_nonblock(remout); 1390 1391 if (fd != -1) { 1392 if (close(fd) == -1 && !haderr) 1393 haderr = errno; 1394 fd = -1; 1395 } 1396 if (!haderr) 1397 (void) atomicio(vwrite, remout, "", 1); 1398 else 1399 run_err("%s: %s", name, strerror(haderr)); 1400 (void) response(); 1401 if (showprogress) 1402 stop_progress_meter(); 1403 } 1404 } 1405 1406 void 1407 rsource(char *name, struct stat *statp) 1408 { 1409 DIR *dirp; 1410 struct dirent *dp; 1411 char *last, *vect[1], path[PATH_MAX]; 1412 1413 if (!(dirp = opendir(name))) { 1414 run_err("%s: %s", name, strerror(errno)); 1415 return; 1416 } 1417 last = strrchr(name, '/'); 1418 if (last == NULL) 1419 last = name; 1420 else 1421 last++; 1422 if (pflag) { 1423 if (do_times(remout, verbose_mode, statp) < 0) { 1424 closedir(dirp); 1425 return; 1426 } 1427 } 1428 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1429 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1430 if (verbose_mode) 1431 fmprintf(stderr, "Entering directory: %s", path); 1432 (void) atomicio(vwrite, remout, path, strlen(path)); 1433 if (response() < 0) { 1434 closedir(dirp); 1435 return; 1436 } 1437 while ((dp = readdir(dirp)) != NULL) { 1438 if (dp->d_ino == 0) 1439 continue; 1440 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1441 continue; 1442 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 1443 run_err("%s/%s: name too long", name, dp->d_name); 1444 continue; 1445 } 1446 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 1447 vect[0] = path; 1448 source(1, vect); 1449 } 1450 (void) closedir(dirp); 1451 (void) atomicio(vwrite, remout, "E\n", 2); 1452 (void) response(); 1453 } 1454 1455 void 1456 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) 1457 { 1458 char *abs_src = NULL; 1459 char *abs_dst = NULL; 1460 glob_t g; 1461 char *filename, *tmp = NULL; 1462 int i, r, err = 0, dst_is_dir; 1463 struct stat st; 1464 1465 memset(&g, 0, sizeof(g)); 1466 1467 /* 1468 * Here, we need remote glob as SFTP can not depend on remote shell 1469 * expansions 1470 */ 1471 if ((abs_src = prepare_remote_path(conn, src)) == NULL) { 1472 err = -1; 1473 goto out; 1474 } 1475 1476 debug3_f("copying remote %s to local %s", abs_src, dst); 1477 if ((r = remote_glob(conn, abs_src, GLOB_MARK, NULL, &g)) != 0) { 1478 if (r == GLOB_NOSPACE) 1479 error("%s: too many glob matches", src); 1480 else 1481 error("%s: %s", src, strerror(ENOENT)); 1482 err = -1; 1483 goto out; 1484 } 1485 1486 if ((r = stat(dst, &st)) != 0) 1487 debug2_f("stat local \"%s\": %s", dst, strerror(errno)); 1488 dst_is_dir = r == 0 && S_ISDIR(st.st_mode); 1489 1490 if (g.gl_matchc > 1 && !dst_is_dir) { 1491 if (r == 0) { 1492 error("Multiple files match pattern, but destination " 1493 "\"%s\" is not a directory", dst); 1494 err = -1; 1495 goto out; 1496 } 1497 debug2_f("creating destination \"%s\"", dst); 1498 if (mkdir(dst, 0777) != 0) { 1499 error("local mkdir \"%s\": %s", dst, strerror(errno)); 1500 err = -1; 1501 goto out; 1502 } 1503 dst_is_dir = 1; 1504 } 1505 1506 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1507 tmp = xstrdup(g.gl_pathv[i]); 1508 if ((filename = basename(tmp)) == NULL) { 1509 error("basename %s: %s", tmp, strerror(errno)); 1510 err = -1; 1511 goto out; 1512 } 1513 1514 if (dst_is_dir) 1515 abs_dst = path_append(dst, filename); 1516 else 1517 abs_dst = xstrdup(dst); 1518 1519 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1520 if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1521 if (download_dir(conn, g.gl_pathv[i], abs_dst, NULL, 1522 pflag, SFTP_PROGRESS_ONLY, 0, 0, 1) == -1) 1523 err = -1; 1524 } else { 1525 if (do_download(conn, g.gl_pathv[i], abs_dst, NULL, 1526 pflag, 0, 0) == -1) 1527 err = -1; 1528 } 1529 free(abs_dst); 1530 abs_dst = NULL; 1531 free(tmp); 1532 tmp = NULL; 1533 } 1534 1535 out: 1536 free(abs_src); 1537 free(tmp); 1538 globfree(&g); 1539 if (err == -1) 1540 errs = 1; 1541 } 1542 1543 1544 #define TYPE_OVERFLOW(type, val) \ 1545 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1546 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1547 (sizeof(type) != 4 && sizeof(type) != 8)) 1548 1549 void 1550 sink(int argc, char **argv, const char *src) 1551 { 1552 static BUF buffer; 1553 struct stat stb; 1554 BUF *bp; 1555 off_t i; 1556 size_t j, count; 1557 int amt, exists, first, ofd; 1558 mode_t mode, omode, mask; 1559 off_t size, statbytes; 1560 unsigned long long ull; 1561 int setimes, targisdir, wrerr; 1562 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 1563 char **patterns = NULL; 1564 size_t n, npatterns = 0; 1565 struct timeval tv[2]; 1566 1567 #define atime tv[0] 1568 #define mtime tv[1] 1569 #define SCREWUP(str) { why = str; goto screwup; } 1570 1571 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1572 SCREWUP("Unexpected off_t/time_t size"); 1573 1574 setimes = targisdir = 0; 1575 mask = umask(0); 1576 if (!pflag) 1577 (void) umask(mask); 1578 if (argc != 1) { 1579 run_err("ambiguous target"); 1580 exit(1); 1581 } 1582 targ = *argv; 1583 if (targetshouldbedirectory) 1584 verifydir(targ); 1585 1586 (void) atomicio(vwrite, remout, "", 1); 1587 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1588 targisdir = 1; 1589 if (src != NULL && !iamrecursive && !Tflag) { 1590 /* 1591 * Prepare to try to restrict incoming filenames to match 1592 * the requested destination file glob. 1593 */ 1594 if (brace_expand(src, &patterns, &npatterns) != 0) 1595 fatal_f("could not expand pattern"); 1596 } 1597 for (first = 1;; first = 0) { 1598 cp = buf; 1599 if (atomicio(read, remin, cp, 1) != 1) 1600 goto done; 1601 if (*cp++ == '\n') 1602 SCREWUP("unexpected <newline>"); 1603 do { 1604 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1605 SCREWUP("lost connection"); 1606 *cp++ = ch; 1607 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1608 *cp = 0; 1609 if (verbose_mode) 1610 fmprintf(stderr, "Sink: %s", buf); 1611 1612 if (buf[0] == '\01' || buf[0] == '\02') { 1613 if (iamremote == 0) { 1614 (void) snmprintf(visbuf, sizeof(visbuf), 1615 NULL, "%s", buf + 1); 1616 (void) atomicio(vwrite, STDERR_FILENO, 1617 visbuf, strlen(visbuf)); 1618 } 1619 if (buf[0] == '\02') 1620 exit(1); 1621 ++errs; 1622 continue; 1623 } 1624 if (buf[0] == 'E') { 1625 (void) atomicio(vwrite, remout, "", 1); 1626 goto done; 1627 } 1628 if (ch == '\n') 1629 *--cp = 0; 1630 1631 cp = buf; 1632 if (*cp == 'T') { 1633 setimes++; 1634 cp++; 1635 if (!isdigit((unsigned char)*cp)) 1636 SCREWUP("mtime.sec not present"); 1637 ull = strtoull(cp, &cp, 10); 1638 if (!cp || *cp++ != ' ') 1639 SCREWUP("mtime.sec not delimited"); 1640 if (TYPE_OVERFLOW(time_t, ull)) 1641 setimes = 0; /* out of range */ 1642 mtime.tv_sec = ull; 1643 mtime.tv_usec = strtol(cp, &cp, 10); 1644 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1645 mtime.tv_usec > 999999) 1646 SCREWUP("mtime.usec not delimited"); 1647 if (!isdigit((unsigned char)*cp)) 1648 SCREWUP("atime.sec not present"); 1649 ull = strtoull(cp, &cp, 10); 1650 if (!cp || *cp++ != ' ') 1651 SCREWUP("atime.sec not delimited"); 1652 if (TYPE_OVERFLOW(time_t, ull)) 1653 setimes = 0; /* out of range */ 1654 atime.tv_sec = ull; 1655 atime.tv_usec = strtol(cp, &cp, 10); 1656 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1657 atime.tv_usec > 999999) 1658 SCREWUP("atime.usec not delimited"); 1659 (void) atomicio(vwrite, remout, "", 1); 1660 continue; 1661 } 1662 if (*cp != 'C' && *cp != 'D') { 1663 /* 1664 * Check for the case "rcp remote:foo\* local:bar". 1665 * In this case, the line "No match." can be returned 1666 * by the shell before the rcp command on the remote is 1667 * executed so the ^Aerror_message convention isn't 1668 * followed. 1669 */ 1670 if (first) { 1671 run_err("%s", cp); 1672 exit(1); 1673 } 1674 SCREWUP("expected control record"); 1675 } 1676 mode = 0; 1677 for (++cp; cp < buf + 5; cp++) { 1678 if (*cp < '0' || *cp > '7') 1679 SCREWUP("bad mode"); 1680 mode = (mode << 3) | (*cp - '0'); 1681 } 1682 if (!pflag) 1683 mode &= ~mask; 1684 if (*cp++ != ' ') 1685 SCREWUP("mode not delimited"); 1686 1687 if (!isdigit((unsigned char)*cp)) 1688 SCREWUP("size not present"); 1689 ull = strtoull(cp, &cp, 10); 1690 if (!cp || *cp++ != ' ') 1691 SCREWUP("size not delimited"); 1692 if (TYPE_OVERFLOW(off_t, ull)) 1693 SCREWUP("size out of range"); 1694 size = (off_t)ull; 1695 1696 if (*cp == '\0' || strchr(cp, '/') != NULL || 1697 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1698 run_err("error: unexpected filename: %s", cp); 1699 exit(1); 1700 } 1701 if (npatterns > 0) { 1702 for (n = 0; n < npatterns; n++) { 1703 if (fnmatch(patterns[n], cp, 0) == 0) 1704 break; 1705 } 1706 if (n >= npatterns) 1707 SCREWUP("filename does not match request"); 1708 } 1709 if (targisdir) { 1710 static char *namebuf; 1711 static size_t cursize; 1712 size_t need; 1713 1714 need = strlen(targ) + strlen(cp) + 250; 1715 if (need > cursize) { 1716 free(namebuf); 1717 namebuf = xmalloc(need); 1718 cursize = need; 1719 } 1720 (void) snprintf(namebuf, need, "%s%s%s", targ, 1721 strcmp(targ, "/") ? "/" : "", cp); 1722 np = namebuf; 1723 } else 1724 np = targ; 1725 curfile = cp; 1726 exists = stat(np, &stb) == 0; 1727 if (buf[0] == 'D') { 1728 int mod_flag = pflag; 1729 if (!iamrecursive) 1730 SCREWUP("received directory without -r"); 1731 if (exists) { 1732 if (!S_ISDIR(stb.st_mode)) { 1733 errno = ENOTDIR; 1734 goto bad; 1735 } 1736 if (pflag) 1737 (void) chmod(np, mode); 1738 } else { 1739 /* Handle copying from a read-only directory */ 1740 mod_flag = 1; 1741 if (mkdir(np, mode | S_IRWXU) == -1) 1742 goto bad; 1743 } 1744 vect[0] = xstrdup(np); 1745 sink(1, vect, src); 1746 if (setimes) { 1747 setimes = 0; 1748 (void) utimes(vect[0], tv); 1749 } 1750 if (mod_flag) 1751 (void) chmod(vect[0], mode); 1752 free(vect[0]); 1753 continue; 1754 } 1755 omode = mode; 1756 mode |= S_IWUSR; 1757 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1758 bad: run_err("%s: %s", np, strerror(errno)); 1759 continue; 1760 } 1761 (void) atomicio(vwrite, remout, "", 1); 1762 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1763 (void) close(ofd); 1764 continue; 1765 } 1766 cp = bp->buf; 1767 wrerr = 0; 1768 1769 /* 1770 * NB. do not use run_err() unless immediately followed by 1771 * exit() below as it may send a spurious reply that might 1772 * desyncronise us from the peer. Use note_err() instead. 1773 */ 1774 statbytes = 0; 1775 if (showprogress) 1776 start_progress_meter(curfile, size, &statbytes); 1777 set_nonblock(remin); 1778 for (count = i = 0; i < size; i += bp->cnt) { 1779 amt = bp->cnt; 1780 if (i + amt > size) 1781 amt = size - i; 1782 count += amt; 1783 do { 1784 j = atomicio6(read, remin, cp, amt, 1785 scpio, &statbytes); 1786 if (j == 0) { 1787 run_err("%s", j != EPIPE ? 1788 strerror(errno) : 1789 "dropped connection"); 1790 exit(1); 1791 } 1792 amt -= j; 1793 cp += j; 1794 } while (amt > 0); 1795 1796 if (count == bp->cnt) { 1797 /* Keep reading so we stay sync'd up. */ 1798 if (!wrerr) { 1799 if (atomicio(vwrite, ofd, bp->buf, 1800 count) != count) { 1801 note_err("%s: %s", np, 1802 strerror(errno)); 1803 wrerr = 1; 1804 } 1805 } 1806 count = 0; 1807 cp = bp->buf; 1808 } 1809 } 1810 unset_nonblock(remin); 1811 if (count != 0 && !wrerr && 1812 atomicio(vwrite, ofd, bp->buf, count) != count) { 1813 note_err("%s: %s", np, strerror(errno)); 1814 wrerr = 1; 1815 } 1816 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1817 ftruncate(ofd, size) != 0) 1818 note_err("%s: truncate: %s", np, strerror(errno)); 1819 if (pflag) { 1820 if (exists || omode != mode) 1821 if (fchmod(ofd, omode)) { 1822 note_err("%s: set mode: %s", 1823 np, strerror(errno)); 1824 } 1825 } else { 1826 if (!exists && omode != mode) 1827 if (fchmod(ofd, omode & ~mask)) { 1828 note_err("%s: set mode: %s", 1829 np, strerror(errno)); 1830 } 1831 } 1832 if (close(ofd) == -1) 1833 note_err("%s: close: %s", np, strerror(errno)); 1834 (void) response(); 1835 if (showprogress) 1836 stop_progress_meter(); 1837 if (setimes && !wrerr) { 1838 setimes = 0; 1839 if (utimes(np, tv) == -1) { 1840 note_err("%s: set times: %s", 1841 np, strerror(errno)); 1842 } 1843 } 1844 /* If no error was noted then signal success for this file */ 1845 if (note_err(NULL) == 0) 1846 (void) atomicio(vwrite, remout, "", 1); 1847 } 1848 done: 1849 for (n = 0; n < npatterns; n++) 1850 free(patterns[n]); 1851 free(patterns); 1852 return; 1853 screwup: 1854 for (n = 0; n < npatterns; n++) 1855 free(patterns[n]); 1856 free(patterns); 1857 run_err("protocol error: %s", why); 1858 exit(1); 1859 } 1860 1861 void 1862 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, 1863 char *src, char *targ) 1864 { 1865 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1866 char *abs_src = NULL, *tmp = NULL; 1867 glob_t g; 1868 int i, r, targetisdir, err = 0; 1869 1870 if ((filename = basename(src)) == NULL) 1871 fatal("basename %s: %s", src, strerror(errno)); 1872 1873 if ((abs_src = prepare_remote_path(from, src)) == NULL || 1874 (target = prepare_remote_path(to, targ)) == NULL) 1875 cleanup_exit(255); 1876 memset(&g, 0, sizeof(g)); 1877 1878 targetisdir = remote_is_dir(to, target); 1879 if (!targetisdir && targetshouldbedirectory) { 1880 error("%s: destination is not a directory", targ); 1881 err = -1; 1882 goto out; 1883 } 1884 1885 debug3_f("copying remote %s to remote %s", abs_src, target); 1886 if ((r = remote_glob(from, abs_src, GLOB_MARK, NULL, &g)) != 0) { 1887 if (r == GLOB_NOSPACE) 1888 error("%s: too many glob matches", src); 1889 else 1890 error("%s: %s", src, strerror(ENOENT)); 1891 err = -1; 1892 goto out; 1893 } 1894 1895 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1896 tmp = xstrdup(g.gl_pathv[i]); 1897 if ((filename = basename(tmp)) == NULL) { 1898 error("basename %s: %s", tmp, strerror(errno)); 1899 err = -1; 1900 goto out; 1901 } 1902 1903 if (targetisdir) 1904 abs_dst = path_append(target, filename); 1905 else 1906 abs_dst = xstrdup(target); 1907 1908 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1909 if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1910 if (crossload_dir(from, to, g.gl_pathv[i], abs_dst, 1911 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) 1912 err = -1; 1913 } else { 1914 if (do_crossload(from, to, g.gl_pathv[i], abs_dst, NULL, 1915 pflag) == -1) 1916 err = -1; 1917 } 1918 free(abs_dst); 1919 abs_dst = NULL; 1920 free(tmp); 1921 tmp = NULL; 1922 } 1923 1924 out: 1925 free(abs_src); 1926 free(abs_dst); 1927 free(target); 1928 free(tmp); 1929 globfree(&g); 1930 if (err == -1) 1931 errs = 1; 1932 } 1933 1934 int 1935 response(void) 1936 { 1937 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1938 1939 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1940 lostconn(0); 1941 1942 cp = rbuf; 1943 switch (resp) { 1944 case 0: /* ok */ 1945 return (0); 1946 default: 1947 *cp++ = resp; 1948 /* FALLTHROUGH */ 1949 case 1: /* error, followed by error msg */ 1950 case 2: /* fatal error, "" */ 1951 do { 1952 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1953 lostconn(0); 1954 *cp++ = ch; 1955 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1956 1957 if (!iamremote) { 1958 cp[-1] = '\0'; 1959 (void) snmprintf(visbuf, sizeof(visbuf), 1960 NULL, "%s\n", rbuf); 1961 (void) atomicio(vwrite, STDERR_FILENO, 1962 visbuf, strlen(visbuf)); 1963 } 1964 ++errs; 1965 if (resp == 1) 1966 return (-1); 1967 exit(1); 1968 } 1969 /* NOTREACHED */ 1970 } 1971 1972 void 1973 usage(void) 1974 { 1975 (void) fprintf(stderr, 1976 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" 1977 " [-i identity_file] [-J destination] [-l limit]\n" 1978 " [-o ssh_option] [-P port] [-S program] source ... target\n"); 1979 exit(1); 1980 } 1981 1982 void 1983 run_err(const char *fmt,...) 1984 { 1985 static FILE *fp; 1986 va_list ap; 1987 1988 ++errs; 1989 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1990 (void) fprintf(fp, "%c", 0x01); 1991 (void) fprintf(fp, "scp: "); 1992 va_start(ap, fmt); 1993 (void) vfprintf(fp, fmt, ap); 1994 va_end(ap); 1995 (void) fprintf(fp, "\n"); 1996 (void) fflush(fp); 1997 } 1998 1999 if (!iamremote) { 2000 va_start(ap, fmt); 2001 vfmprintf(stderr, fmt, ap); 2002 va_end(ap); 2003 fprintf(stderr, "\n"); 2004 } 2005 } 2006 2007 /* 2008 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 2009 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 2010 * any active error at the end of the transfer. 2011 */ 2012 int 2013 note_err(const char *fmt, ...) 2014 { 2015 static char *emsg; 2016 va_list ap; 2017 2018 /* Replay any previously-noted error */ 2019 if (fmt == NULL) { 2020 if (emsg == NULL) 2021 return 0; 2022 run_err("%s", emsg); 2023 free(emsg); 2024 emsg = NULL; 2025 return -1; 2026 } 2027 2028 errs++; 2029 /* Prefer first-noted error */ 2030 if (emsg != NULL) 2031 return -1; 2032 2033 va_start(ap, fmt); 2034 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 2035 va_end(ap); 2036 return -1; 2037 } 2038 2039 void 2040 verifydir(char *cp) 2041 { 2042 struct stat stb; 2043 2044 if (!stat(cp, &stb)) { 2045 if (S_ISDIR(stb.st_mode)) 2046 return; 2047 errno = ENOTDIR; 2048 } 2049 run_err("%s: %s", cp, strerror(errno)); 2050 killchild(0); 2051 } 2052 2053 int 2054 okname(char *cp0) 2055 { 2056 int c; 2057 char *cp; 2058 2059 cp = cp0; 2060 do { 2061 c = (int)*cp; 2062 if (c & 0200) 2063 goto bad; 2064 if (!isalpha(c) && !isdigit((unsigned char)c)) { 2065 switch (c) { 2066 case '\'': 2067 case '"': 2068 case '`': 2069 case ' ': 2070 case '#': 2071 goto bad; 2072 default: 2073 break; 2074 } 2075 } 2076 } while (*++cp); 2077 return (1); 2078 2079 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 2080 return (0); 2081 } 2082 2083 BUF * 2084 allocbuf(BUF *bp, int fd, int blksize) 2085 { 2086 size_t size; 2087 struct stat stb; 2088 2089 if (fstat(fd, &stb) == -1) { 2090 run_err("fstat: %s", strerror(errno)); 2091 return (0); 2092 } 2093 size = ROUNDUP(stb.st_blksize, blksize); 2094 if (size == 0) 2095 size = blksize; 2096 if (bp->cnt >= size) 2097 return (bp); 2098 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 2099 bp->cnt = size; 2100 return (bp); 2101 } 2102 2103 void 2104 lostconn(int signo) 2105 { 2106 if (!iamremote) 2107 (void)write(STDERR_FILENO, "lost connection\n", 16); 2108 if (signo) 2109 _exit(1); 2110 else 2111 exit(1); 2112 } 2113 2114 void 2115 cleanup_exit(int i) 2116 { 2117 if (remin > 0) 2118 close(remin); 2119 if (remout > 0) 2120 close(remout); 2121 if (remin2 > 0) 2122 close(remin2); 2123 if (remout2 > 0) 2124 close(remout2); 2125 if (do_cmd_pid > 0) 2126 waitpid(do_cmd_pid, NULL, 0); 2127 if (do_cmd_pid2 > 0) 2128 waitpid(do_cmd_pid2, NULL, 0); 2129 exit(i); 2130 } 2131