1 /* $OpenBSD: scp.c,v 1.261 2024/06/26 23:14:14 deraadt 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 <util.h> 100 #include <vis.h> 101 102 #include "xmalloc.h" 103 #include "ssh.h" 104 #include "atomicio.h" 105 #include "pathnames.h" 106 #include "log.h" 107 #include "misc.h" 108 #include "progressmeter.h" 109 #include "utf8.h" 110 #include "sftp.h" 111 112 #include "sftp-common.h" 113 #include "sftp-client.h" 114 115 #define COPY_BUFLEN 16384 116 117 int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *); 118 int do_cmd2(char *, char *, int, char *, int, int); 119 120 /* Struct for addargs */ 121 arglist args; 122 arglist remote_remote_args; 123 124 /* Bandwidth limit */ 125 long long limit_kbps = 0; 126 struct bwlimit bwlimit; 127 128 /* Name of current file being transferred. */ 129 char *curfile; 130 131 /* This is set to non-zero to enable verbose mode. */ 132 int verbose_mode = 0; 133 LogLevel log_level = SYSLOG_LEVEL_INFO; 134 135 /* This is set to zero if the progressmeter is not desired. */ 136 int showprogress = 1; 137 138 /* 139 * This is set to non-zero if remote-remote copy should be piped 140 * through this process. 141 */ 142 int throughlocal = 1; 143 144 /* Non-standard port to use for the ssh connection or -1. */ 145 int sshport = -1; 146 147 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 148 char *ssh_program = _PATH_SSH_PROGRAM; 149 150 /* This is used to store the pid of ssh_program */ 151 pid_t do_cmd_pid = -1; 152 pid_t do_cmd_pid2 = -1; 153 154 /* SFTP copy parameters */ 155 size_t sftp_copy_buflen; 156 size_t sftp_nrequests; 157 158 /* Needed for sftp */ 159 volatile sig_atomic_t interrupted = 0; 160 161 int sftp_glob(struct sftp_conn *, const char *, int, 162 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ 163 164 static void 165 killchild(int signo) 166 { 167 if (do_cmd_pid > 1) { 168 kill(do_cmd_pid, signo ? signo : SIGTERM); 169 (void)waitpid(do_cmd_pid, NULL, 0); 170 } 171 if (do_cmd_pid2 > 1) { 172 kill(do_cmd_pid2, signo ? signo : SIGTERM); 173 (void)waitpid(do_cmd_pid2, NULL, 0); 174 } 175 176 if (signo) 177 _exit(1); 178 exit(1); 179 } 180 181 static void 182 suspone(int pid, int signo) 183 { 184 int status; 185 186 if (pid > 1) { 187 kill(pid, signo); 188 while (waitpid(pid, &status, WUNTRACED) == -1 && 189 errno == EINTR) 190 ; 191 } 192 } 193 194 static void 195 suspchild(int signo) 196 { 197 int save_errno = errno; 198 suspone(do_cmd_pid, signo); 199 suspone(do_cmd_pid2, signo); 200 kill(getpid(), SIGSTOP); 201 errno = save_errno; 202 } 203 204 static int 205 do_local_cmd(arglist *a) 206 { 207 u_int i; 208 int status; 209 pid_t pid; 210 211 if (a->num == 0) 212 fatal("do_local_cmd: no arguments"); 213 214 if (verbose_mode) { 215 fprintf(stderr, "Executing:"); 216 for (i = 0; i < a->num; i++) 217 fmprintf(stderr, " %s", a->list[i]); 218 fprintf(stderr, "\n"); 219 } 220 if ((pid = fork()) == -1) 221 fatal("do_local_cmd: fork: %s", strerror(errno)); 222 223 if (pid == 0) { 224 execvp(a->list[0], a->list); 225 perror(a->list[0]); 226 exit(1); 227 } 228 229 do_cmd_pid = pid; 230 ssh_signal(SIGTERM, killchild); 231 ssh_signal(SIGINT, killchild); 232 ssh_signal(SIGHUP, killchild); 233 234 while (waitpid(pid, &status, 0) == -1) 235 if (errno != EINTR) 236 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 237 238 do_cmd_pid = -1; 239 240 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 241 return (-1); 242 243 return (0); 244 } 245 246 /* 247 * This function executes the given command as the specified user on the 248 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 249 * assigns the input and output file descriptors on success. 250 */ 251 252 int 253 do_cmd(char *program, char *host, char *remuser, int port, int subsystem, 254 char *cmd, int *fdin, int *fdout, pid_t *pid) 255 { 256 int sv[2]; 257 258 if (verbose_mode) 259 fmprintf(stderr, 260 "Executing: program %s host %s, user %s, command %s\n", 261 program, host, 262 remuser ? remuser : "(unspecified)", cmd); 263 264 if (port == -1) 265 port = sshport; 266 267 /* Create a socket pair for communicating with ssh. */ 268 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) 269 fatal("socketpair: %s", strerror(errno)); 270 271 ssh_signal(SIGTSTP, suspchild); 272 ssh_signal(SIGTTIN, suspchild); 273 ssh_signal(SIGTTOU, suspchild); 274 275 /* Fork a child to execute the command on the remote host using ssh. */ 276 *pid = fork(); 277 switch (*pid) { 278 case -1: 279 fatal("fork: %s", strerror(errno)); 280 case 0: 281 /* Child. */ 282 if (dup2(sv[0], STDIN_FILENO) == -1 || 283 dup2(sv[0], STDOUT_FILENO) == -1) { 284 perror("dup2"); 285 _exit(1); 286 } 287 close(sv[0]); 288 close(sv[1]); 289 replacearg(&args, 0, "%s", program); 290 if (port != -1) { 291 addargs(&args, "-p"); 292 addargs(&args, "%d", port); 293 } 294 if (remuser != NULL) { 295 addargs(&args, "-l"); 296 addargs(&args, "%s", remuser); 297 } 298 if (subsystem) 299 addargs(&args, "-s"); 300 addargs(&args, "--"); 301 addargs(&args, "%s", host); 302 addargs(&args, "%s", cmd); 303 304 execvp(program, args.list); 305 perror(program); 306 _exit(1); 307 default: 308 /* Parent. Close the other side, and return the local side. */ 309 close(sv[0]); 310 *fdin = sv[1]; 311 *fdout = sv[1]; 312 ssh_signal(SIGTERM, killchild); 313 ssh_signal(SIGINT, killchild); 314 ssh_signal(SIGHUP, killchild); 315 return 0; 316 } 317 } 318 319 /* 320 * This function executes a command similar to do_cmd(), but expects the 321 * input and output descriptors to be setup by a previous call to do_cmd(). 322 * This way the input and output of two commands can be connected. 323 */ 324 int 325 do_cmd2(char *host, char *remuser, int port, char *cmd, 326 int fdin, int fdout) 327 { 328 int status; 329 pid_t pid; 330 331 if (verbose_mode) 332 fmprintf(stderr, 333 "Executing: 2nd program %s host %s, user %s, command %s\n", 334 ssh_program, host, 335 remuser ? remuser : "(unspecified)", cmd); 336 337 if (port == -1) 338 port = sshport; 339 340 /* Fork a child to execute the command on the remote host using ssh. */ 341 pid = fork(); 342 if (pid == 0) { 343 if (dup2(fdin, 0) == -1) 344 perror("dup2"); 345 if (dup2(fdout, 1) == -1) 346 perror("dup2"); 347 348 replacearg(&args, 0, "%s", ssh_program); 349 if (port != -1) { 350 addargs(&args, "-p"); 351 addargs(&args, "%d", port); 352 } 353 if (remuser != NULL) { 354 addargs(&args, "-l"); 355 addargs(&args, "%s", remuser); 356 } 357 addargs(&args, "-oBatchMode=yes"); 358 addargs(&args, "--"); 359 addargs(&args, "%s", host); 360 addargs(&args, "%s", cmd); 361 362 execvp(ssh_program, args.list); 363 perror(ssh_program); 364 exit(1); 365 } else if (pid == -1) { 366 fatal("fork: %s", strerror(errno)); 367 } 368 while (waitpid(pid, &status, 0) == -1) 369 if (errno != EINTR) 370 fatal("do_cmd2: waitpid: %s", strerror(errno)); 371 return 0; 372 } 373 374 typedef struct { 375 size_t cnt; 376 char *buf; 377 } BUF; 378 379 BUF *allocbuf(BUF *, int, int); 380 void lostconn(int); 381 int okname(char *); 382 void run_err(const char *,...) 383 __attribute__((__format__ (printf, 1, 2))) 384 __attribute__((__nonnull__ (1))); 385 int note_err(const char *,...) 386 __attribute__((__format__ (printf, 1, 2))); 387 void verifydir(char *); 388 389 struct passwd *pwd; 390 uid_t userid; 391 int errs, remin, remout, remin2, remout2; 392 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 393 394 #define CMDNEEDS 64 395 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 396 397 enum scp_mode_e { 398 MODE_SCP, 399 MODE_SFTP 400 }; 401 402 int response(void); 403 void rsource(char *, struct stat *); 404 void sink(int, char *[], const char *); 405 void source(int, char *[]); 406 void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); 407 void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); 408 void usage(void); 409 410 void source_sftp(int, char *, char *, struct sftp_conn *); 411 void sink_sftp(int, char *, const char *, struct sftp_conn *); 412 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, 413 char *, char *); 414 415 int 416 main(int argc, char **argv) 417 { 418 int ch, fflag, tflag, status, r, n; 419 char **newargv, *argv0; 420 const char *errstr; 421 extern char *optarg; 422 extern int optind; 423 enum scp_mode_e mode = MODE_SFTP; 424 char *sftp_direct = NULL; 425 long long llv; 426 427 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 428 sanitise_stdfd(); 429 430 setlocale(LC_CTYPE, ""); 431 432 /* Copy argv, because we modify it */ 433 argv0 = argv[0]; 434 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 435 for (n = 0; n < argc; n++) 436 newargv[n] = xstrdup(argv[n]); 437 argv = newargv; 438 439 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 440 441 memset(&args, '\0', sizeof(args)); 442 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 443 args.list = remote_remote_args.list = NULL; 444 addargs(&args, "%s", ssh_program); 445 addargs(&args, "-x"); 446 addargs(&args, "-oPermitLocalCommand=no"); 447 addargs(&args, "-oClearAllForwardings=yes"); 448 addargs(&args, "-oRemoteCommand=none"); 449 addargs(&args, "-oRequestTTY=no"); 450 451 fflag = Tflag = tflag = 0; 452 while ((ch = getopt(argc, argv, 453 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) { 454 switch (ch) { 455 /* User-visible flags. */ 456 case '1': 457 fatal("SSH protocol v.1 is no longer supported"); 458 break; 459 case '2': 460 /* Ignored */ 461 break; 462 case 'A': 463 case '4': 464 case '6': 465 case 'C': 466 addargs(&args, "-%c", ch); 467 addargs(&remote_remote_args, "-%c", ch); 468 break; 469 case 'D': 470 sftp_direct = optarg; 471 break; 472 case '3': 473 throughlocal = 1; 474 break; 475 case 'R': 476 throughlocal = 0; 477 break; 478 case 'o': 479 case 'c': 480 case 'i': 481 case 'F': 482 case 'J': 483 addargs(&remote_remote_args, "-%c", ch); 484 addargs(&remote_remote_args, "%s", optarg); 485 addargs(&args, "-%c", ch); 486 addargs(&args, "%s", optarg); 487 break; 488 case 'O': 489 mode = MODE_SCP; 490 break; 491 case 's': 492 mode = MODE_SFTP; 493 break; 494 case 'P': 495 sshport = a2port(optarg); 496 if (sshport <= 0) 497 fatal("bad port \"%s\"\n", optarg); 498 break; 499 case 'B': 500 addargs(&remote_remote_args, "-oBatchmode=yes"); 501 addargs(&args, "-oBatchmode=yes"); 502 break; 503 case 'l': 504 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 505 &errstr); 506 if (errstr != NULL) 507 usage(); 508 limit_kbps *= 1024; /* kbps */ 509 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 510 break; 511 case 'p': 512 pflag = 1; 513 break; 514 case 'r': 515 iamrecursive = 1; 516 break; 517 case 'S': 518 ssh_program = xstrdup(optarg); 519 break; 520 case 'v': 521 addargs(&args, "-v"); 522 addargs(&remote_remote_args, "-v"); 523 if (verbose_mode == 0) 524 log_level = SYSLOG_LEVEL_DEBUG1; 525 else if (log_level < SYSLOG_LEVEL_DEBUG3) 526 log_level++; 527 verbose_mode = 1; 528 break; 529 case 'q': 530 addargs(&args, "-q"); 531 addargs(&remote_remote_args, "-q"); 532 showprogress = 0; 533 break; 534 case 'X': 535 /* Please keep in sync with sftp.c -X */ 536 if (strncmp(optarg, "buffer=", 7) == 0) { 537 r = scan_scaled(optarg + 7, &llv); 538 if (r == 0 && (llv <= 0 || llv > 256 * 1024)) { 539 r = -1; 540 errno = EINVAL; 541 } 542 if (r == -1) { 543 fatal("Invalid buffer size \"%s\": %s", 544 optarg + 7, strerror(errno)); 545 } 546 sftp_copy_buflen = (size_t)llv; 547 } else if (strncmp(optarg, "nrequests=", 10) == 0) { 548 llv = strtonum(optarg + 10, 1, 256 * 1024, 549 &errstr); 550 if (errstr != NULL) { 551 fatal("Invalid number of requests " 552 "\"%s\": %s", optarg + 10, errstr); 553 } 554 sftp_nrequests = (size_t)llv; 555 } else { 556 fatal("Invalid -X option"); 557 } 558 break; 559 560 /* Server options. */ 561 case 'd': 562 targetshouldbedirectory = 1; 563 break; 564 case 'f': /* "from" */ 565 iamremote = 1; 566 fflag = 1; 567 break; 568 case 't': /* "to" */ 569 iamremote = 1; 570 tflag = 1; 571 break; 572 case 'T': 573 Tflag = 1; 574 break; 575 default: 576 usage(); 577 } 578 } 579 argc -= optind; 580 argv += optind; 581 582 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 583 584 /* Do this last because we want the user to be able to override it */ 585 addargs(&args, "-oForwardAgent=no"); 586 587 if (iamremote) 588 mode = MODE_SCP; 589 590 if ((pwd = getpwuid(userid = getuid())) == NULL) 591 fatal("unknown user %u", (u_int) userid); 592 593 if (!isatty(STDOUT_FILENO)) 594 showprogress = 0; 595 596 if (pflag) { 597 /* Cannot pledge: -p allows setuid/setgid files... */ 598 } else { 599 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 600 NULL) == -1) { 601 perror("pledge"); 602 exit(1); 603 } 604 } 605 606 remin = STDIN_FILENO; 607 remout = STDOUT_FILENO; 608 609 if (fflag) { 610 /* Follow "protocol", send data. */ 611 (void) response(); 612 source(argc, argv); 613 exit(errs != 0); 614 } 615 if (tflag) { 616 /* Receive data. */ 617 sink(argc, argv, NULL); 618 exit(errs != 0); 619 } 620 if (argc < 2) 621 usage(); 622 if (argc > 2) 623 targetshouldbedirectory = 1; 624 625 remin = remout = -1; 626 do_cmd_pid = -1; 627 /* Command to be executed on remote system using "ssh". */ 628 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 629 verbose_mode ? " -v" : "", 630 iamrecursive ? " -r" : "", pflag ? " -p" : "", 631 targetshouldbedirectory ? " -d" : ""); 632 633 (void) ssh_signal(SIGPIPE, lostconn); 634 635 if (colon(argv[argc - 1])) /* Dest is remote host. */ 636 toremote(argc, argv, mode, sftp_direct); 637 else { 638 if (targetshouldbedirectory) 639 verifydir(argv[argc - 1]); 640 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */ 641 } 642 /* 643 * Finally check the exit status of the ssh process, if one was forked 644 * and no error has occurred yet 645 */ 646 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) { 647 if (remin != -1) 648 (void) close(remin); 649 if (remout != -1) 650 (void) close(remout); 651 if (waitpid(do_cmd_pid, &status, 0) == -1) 652 errs = 1; 653 else { 654 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 655 errs = 1; 656 } 657 } 658 exit(errs != 0); 659 } 660 661 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 662 static int 663 scpio(void *_cnt, size_t s) 664 { 665 off_t *cnt = (off_t *)_cnt; 666 667 *cnt += s; 668 refresh_progress_meter(0); 669 if (limit_kbps > 0) 670 bandwidth_limit(&bwlimit, s); 671 return 0; 672 } 673 674 static int 675 do_times(int fd, int verb, const struct stat *sb) 676 { 677 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 678 char buf[(20 + 7 + 2) * 2 + 2]; 679 680 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 681 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 682 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 683 if (verb) { 684 fprintf(stderr, "File mtime %lld atime %lld\n", 685 (long long)sb->st_mtime, (long long)sb->st_atime); 686 fprintf(stderr, "Sending file timestamps: %s", buf); 687 } 688 (void) atomicio(vwrite, fd, buf, strlen(buf)); 689 return (response()); 690 } 691 692 static int 693 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 694 char **pathp) 695 { 696 int r; 697 698 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 699 if (r == 0 && *pathp == NULL) 700 *pathp = xstrdup("."); 701 return r; 702 } 703 704 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 705 static int 706 append(char *cp, char ***ap, size_t *np) 707 { 708 char **tmp; 709 710 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 711 return -1; 712 tmp[(*np)] = cp; 713 (*np)++; 714 *ap = tmp; 715 return 0; 716 } 717 718 /* 719 * Finds the start and end of the first brace pair in the pattern. 720 * returns 0 on success or -1 for invalid patterns. 721 */ 722 static int 723 find_brace(const char *pattern, int *startp, int *endp) 724 { 725 int i; 726 int in_bracket, brace_level; 727 728 *startp = *endp = -1; 729 in_bracket = brace_level = 0; 730 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 731 switch (pattern[i]) { 732 case '\\': 733 /* skip next character */ 734 if (pattern[i + 1] != '\0') 735 i++; 736 break; 737 case '[': 738 in_bracket = 1; 739 break; 740 case ']': 741 in_bracket = 0; 742 break; 743 case '{': 744 if (in_bracket) 745 break; 746 if (pattern[i + 1] == '}') { 747 /* Protect a single {}, for find(1), like csh */ 748 i++; /* skip */ 749 break; 750 } 751 if (*startp == -1) 752 *startp = i; 753 brace_level++; 754 break; 755 case '}': 756 if (in_bracket) 757 break; 758 if (*startp < 0) { 759 /* Unbalanced brace */ 760 return -1; 761 } 762 if (--brace_level <= 0) 763 *endp = i; 764 break; 765 } 766 } 767 /* unbalanced brackets/braces */ 768 if (*endp < 0 && (*startp >= 0 || in_bracket)) 769 return -1; 770 return 0; 771 } 772 773 /* 774 * Assembles and records a successfully-expanded pattern, returns -1 on 775 * alloc failure. 776 */ 777 static int 778 emit_expansion(const char *pattern, int brace_start, int brace_end, 779 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 780 { 781 char *cp; 782 size_t pattern_len; 783 int o = 0, tail_len; 784 785 if ((pattern_len = strlen(pattern)) == 0 || pattern_len >= INT_MAX) 786 return -1; 787 788 tail_len = strlen(pattern + brace_end + 1); 789 if ((cp = malloc(brace_start + (sel_end - sel_start) + 790 tail_len + 1)) == NULL) 791 return -1; 792 793 /* Pattern before initial brace */ 794 if (brace_start > 0) { 795 memcpy(cp, pattern, brace_start); 796 o = brace_start; 797 } 798 /* Current braced selection */ 799 if (sel_end - sel_start > 0) { 800 memcpy(cp + o, pattern + sel_start, 801 sel_end - sel_start); 802 o += sel_end - sel_start; 803 } 804 /* Remainder of pattern after closing brace */ 805 if (tail_len > 0) { 806 memcpy(cp + o, pattern + brace_end + 1, tail_len); 807 o += tail_len; 808 } 809 cp[o] = '\0'; 810 if (append(cp, patternsp, npatternsp) != 0) { 811 free(cp); 812 return -1; 813 } 814 return 0; 815 } 816 817 /* 818 * Expand the first encountered brace in pattern, appending the expanded 819 * patterns it yielded to the *patternsp array. 820 * 821 * Returns 0 on success or -1 on allocation failure. 822 * 823 * Signals whether expansion was performed via *expanded and whether 824 * pattern was invalid via *invalid. 825 */ 826 static int 827 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 828 int *expanded, int *invalid) 829 { 830 int i; 831 int in_bracket, brace_start, brace_end, brace_level; 832 int sel_start, sel_end; 833 834 *invalid = *expanded = 0; 835 836 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 837 *invalid = 1; 838 return 0; 839 } else if (brace_start == -1) 840 return 0; 841 842 in_bracket = brace_level = 0; 843 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 844 switch (pattern[i]) { 845 case '{': 846 if (in_bracket) 847 break; 848 brace_level++; 849 break; 850 case '}': 851 if (in_bracket) 852 break; 853 brace_level--; 854 break; 855 case '[': 856 in_bracket = 1; 857 break; 858 case ']': 859 in_bracket = 0; 860 break; 861 case '\\': 862 if (i < brace_end - 1) 863 i++; /* skip */ 864 break; 865 } 866 if (pattern[i] == ',' || i == brace_end - 1) { 867 if (in_bracket || brace_level > 0) 868 continue; 869 /* End of a selection, emit an expanded pattern */ 870 871 /* Adjust end index for last selection */ 872 sel_end = (i == brace_end - 1) ? brace_end : i; 873 if (emit_expansion(pattern, brace_start, brace_end, 874 sel_start, sel_end, patternsp, npatternsp) != 0) 875 return -1; 876 /* move on to the next selection */ 877 sel_start = i + 1; 878 continue; 879 } 880 } 881 if (in_bracket || brace_level > 0) { 882 *invalid = 1; 883 return 0; 884 } 885 /* success */ 886 *expanded = 1; 887 return 0; 888 } 889 890 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 891 static int 892 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 893 { 894 char *cp, *cp2, **active = NULL, **done = NULL; 895 size_t i, nactive = 0, ndone = 0; 896 int ret = -1, invalid = 0, expanded = 0; 897 898 *patternsp = NULL; 899 *npatternsp = 0; 900 901 /* Start the worklist with the original pattern */ 902 if ((cp = strdup(pattern)) == NULL) 903 return -1; 904 if (append(cp, &active, &nactive) != 0) { 905 free(cp); 906 return -1; 907 } 908 while (nactive > 0) { 909 cp = active[nactive - 1]; 910 nactive--; 911 if (brace_expand_one(cp, &active, &nactive, 912 &expanded, &invalid) == -1) { 913 free(cp); 914 goto fail; 915 } 916 if (invalid) 917 fatal_f("invalid brace pattern \"%s\"", cp); 918 if (expanded) { 919 /* 920 * Current entry expanded to new entries on the 921 * active list; discard the progenitor pattern. 922 */ 923 free(cp); 924 continue; 925 } 926 /* 927 * Pattern did not expand; append the finename component to 928 * the completed list 929 */ 930 if ((cp2 = strrchr(cp, '/')) != NULL) 931 *cp2++ = '\0'; 932 else 933 cp2 = cp; 934 if (append(xstrdup(cp2), &done, &ndone) != 0) { 935 free(cp); 936 goto fail; 937 } 938 free(cp); 939 } 940 /* success */ 941 *patternsp = done; 942 *npatternsp = ndone; 943 done = NULL; 944 ndone = 0; 945 ret = 0; 946 fail: 947 for (i = 0; i < nactive; i++) 948 free(active[i]); 949 free(active); 950 for (i = 0; i < ndone; i++) 951 free(done[i]); 952 free(done); 953 return ret; 954 } 955 956 static struct sftp_conn * 957 do_sftp_connect(char *host, char *user, int port, char *sftp_direct, 958 int *reminp, int *remoutp, int *pidp) 959 { 960 if (sftp_direct == NULL) { 961 if (do_cmd(ssh_program, host, user, port, 1, "sftp", 962 reminp, remoutp, pidp) < 0) 963 return NULL; 964 965 } else { 966 freeargs(&args); 967 addargs(&args, "sftp-server"); 968 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", 969 reminp, remoutp, pidp) < 0) 970 return NULL; 971 } 972 return sftp_init(*reminp, *remoutp, 973 sftp_copy_buflen, sftp_nrequests, limit_kbps); 974 } 975 976 void 977 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 978 { 979 char *suser = NULL, *host = NULL, *src = NULL; 980 char *bp, *tuser, *thost, *targ; 981 int sport = -1, tport = -1; 982 struct sftp_conn *conn = NULL, *conn2 = NULL; 983 arglist alist; 984 int i, r, status; 985 struct stat sb; 986 u_int j; 987 988 memset(&alist, '\0', sizeof(alist)); 989 alist.list = NULL; 990 991 /* Parse target */ 992 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 993 if (r == -1) { 994 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 995 ++errs; 996 goto out; 997 } 998 if (r != 0) { 999 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 1000 &targ) == -1) { 1001 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 1002 ++errs; 1003 goto out; 1004 } 1005 } 1006 1007 /* Parse source files */ 1008 for (i = 0; i < argc - 1; i++) { 1009 free(suser); 1010 free(host); 1011 free(src); 1012 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1013 if (r == -1) { 1014 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1015 ++errs; 1016 continue; 1017 } 1018 if (r != 0) { 1019 parse_user_host_path(argv[i], &suser, &host, &src); 1020 } 1021 if (suser != NULL && !okname(suser)) { 1022 ++errs; 1023 continue; 1024 } 1025 if (host && throughlocal) { /* extended remote to remote */ 1026 if (mode == MODE_SFTP) { 1027 if (remin == -1) { 1028 /* Connect to dest now */ 1029 conn = do_sftp_connect(thost, tuser, 1030 tport, sftp_direct, 1031 &remin, &remout, &do_cmd_pid); 1032 if (conn == NULL) { 1033 fatal("Unable to open " 1034 "destination connection"); 1035 } 1036 debug3_f("origin in %d out %d pid %ld", 1037 remin, remout, (long)do_cmd_pid); 1038 } 1039 /* 1040 * XXX remember suser/host/sport and only 1041 * reconnect if they change between arguments. 1042 * would save reconnections for cases like 1043 * scp -3 hosta:/foo hosta:/bar hostb: 1044 */ 1045 /* Connect to origin now */ 1046 conn2 = do_sftp_connect(host, suser, 1047 sport, sftp_direct, 1048 &remin2, &remout2, &do_cmd_pid2); 1049 if (conn2 == NULL) { 1050 fatal("Unable to open " 1051 "source connection"); 1052 } 1053 debug3_f("destination in %d out %d pid %ld", 1054 remin2, remout2, (long)do_cmd_pid2); 1055 throughlocal_sftp(conn2, conn, src, targ); 1056 (void) close(remin2); 1057 (void) close(remout2); 1058 remin2 = remout2 = -1; 1059 if (waitpid(do_cmd_pid2, &status, 0) == -1) 1060 ++errs; 1061 else if (!WIFEXITED(status) || 1062 WEXITSTATUS(status) != 0) 1063 ++errs; 1064 do_cmd_pid2 = -1; 1065 continue; 1066 } else { 1067 xasprintf(&bp, "%s -f %s%s", cmd, 1068 *src == '-' ? "-- " : "", src); 1069 if (do_cmd(ssh_program, host, suser, sport, 0, 1070 bp, &remin, &remout, &do_cmd_pid) < 0) 1071 exit(1); 1072 free(bp); 1073 xasprintf(&bp, "%s -t %s%s", cmd, 1074 *targ == '-' ? "-- " : "", targ); 1075 if (do_cmd2(thost, tuser, tport, bp, 1076 remin, remout) < 0) 1077 exit(1); 1078 free(bp); 1079 (void) close(remin); 1080 (void) close(remout); 1081 remin = remout = -1; 1082 } 1083 } else if (host) { /* standard remote to remote */ 1084 /* 1085 * Second remote user is passed to first remote side 1086 * via scp command-line. Ensure it contains no obvious 1087 * shell characters. 1088 */ 1089 if (tuser != NULL && !okname(tuser)) { 1090 ++errs; 1091 continue; 1092 } 1093 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 1094 /* This would require the remote support URIs */ 1095 fatal("target port not supported with two " 1096 "remote hosts and the -R option"); 1097 } 1098 1099 freeargs(&alist); 1100 addargs(&alist, "%s", ssh_program); 1101 addargs(&alist, "-x"); 1102 addargs(&alist, "-oClearAllForwardings=yes"); 1103 addargs(&alist, "-n"); 1104 for (j = 0; j < remote_remote_args.num; j++) { 1105 addargs(&alist, "%s", 1106 remote_remote_args.list[j]); 1107 } 1108 1109 if (sport != -1) { 1110 addargs(&alist, "-p"); 1111 addargs(&alist, "%d", sport); 1112 } 1113 if (suser) { 1114 addargs(&alist, "-l"); 1115 addargs(&alist, "%s", suser); 1116 } 1117 addargs(&alist, "--"); 1118 addargs(&alist, "%s", host); 1119 addargs(&alist, "%s", cmd); 1120 addargs(&alist, "%s", src); 1121 addargs(&alist, "%s%s%s:%s", 1122 tuser ? tuser : "", tuser ? "@" : "", 1123 thost, targ); 1124 if (do_local_cmd(&alist) != 0) 1125 errs = 1; 1126 } else { /* local to remote */ 1127 if (mode == MODE_SFTP) { 1128 /* no need to glob: already done by shell */ 1129 if (stat(argv[i], &sb) != 0) { 1130 fatal("stat local \"%s\": %s", argv[i], 1131 strerror(errno)); 1132 } 1133 if (remin == -1) { 1134 /* Connect to remote now */ 1135 conn = do_sftp_connect(thost, tuser, 1136 tport, sftp_direct, 1137 &remin, &remout, &do_cmd_pid); 1138 if (conn == NULL) { 1139 fatal("Unable to open sftp " 1140 "connection"); 1141 } 1142 } 1143 1144 /* The protocol */ 1145 source_sftp(1, argv[i], targ, conn); 1146 continue; 1147 } 1148 /* SCP */ 1149 if (remin == -1) { 1150 xasprintf(&bp, "%s -t %s%s", cmd, 1151 *targ == '-' ? "-- " : "", targ); 1152 if (do_cmd(ssh_program, thost, tuser, tport, 0, 1153 bp, &remin, &remout, &do_cmd_pid) < 0) 1154 exit(1); 1155 if (response() < 0) 1156 exit(1); 1157 free(bp); 1158 } 1159 source(1, argv + i); 1160 } 1161 } 1162 out: 1163 if (mode == MODE_SFTP) 1164 free(conn); 1165 free(tuser); 1166 free(thost); 1167 free(targ); 1168 free(suser); 1169 free(host); 1170 free(src); 1171 } 1172 1173 void 1174 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 1175 { 1176 char *bp, *host = NULL, *src = NULL, *suser = NULL; 1177 arglist alist; 1178 struct sftp_conn *conn = NULL; 1179 int i, r, sport = -1; 1180 1181 memset(&alist, '\0', sizeof(alist)); 1182 alist.list = NULL; 1183 1184 for (i = 0; i < argc - 1; i++) { 1185 free(suser); 1186 free(host); 1187 free(src); 1188 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1189 if (r == -1) { 1190 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1191 ++errs; 1192 continue; 1193 } 1194 if (r != 0) 1195 parse_user_host_path(argv[i], &suser, &host, &src); 1196 if (suser != NULL && !okname(suser)) { 1197 ++errs; 1198 continue; 1199 } 1200 if (!host) { /* Local to local. */ 1201 freeargs(&alist); 1202 addargs(&alist, "%s", _PATH_CP); 1203 if (iamrecursive) 1204 addargs(&alist, "-r"); 1205 if (pflag) 1206 addargs(&alist, "-p"); 1207 addargs(&alist, "--"); 1208 addargs(&alist, "%s", argv[i]); 1209 addargs(&alist, "%s", argv[argc-1]); 1210 if (do_local_cmd(&alist)) 1211 ++errs; 1212 continue; 1213 } 1214 /* Remote to local. */ 1215 if (mode == MODE_SFTP) { 1216 conn = do_sftp_connect(host, suser, sport, 1217 sftp_direct, &remin, &remout, &do_cmd_pid); 1218 if (conn == NULL) { 1219 error("sftp connection failed"); 1220 ++errs; 1221 continue; 1222 } 1223 1224 /* The protocol */ 1225 sink_sftp(1, argv[argc - 1], src, conn); 1226 1227 free(conn); 1228 (void) close(remin); 1229 (void) close(remout); 1230 remin = remout = -1; 1231 continue; 1232 } 1233 /* SCP */ 1234 xasprintf(&bp, "%s -f %s%s", 1235 cmd, *src == '-' ? "-- " : "", src); 1236 if (do_cmd(ssh_program, host, suser, sport, 0, bp, 1237 &remin, &remout, &do_cmd_pid) < 0) { 1238 free(bp); 1239 ++errs; 1240 continue; 1241 } 1242 free(bp); 1243 sink(1, argv + argc - 1, src); 1244 (void) close(remin); 1245 remin = remout = -1; 1246 } 1247 free(suser); 1248 free(host); 1249 free(src); 1250 } 1251 1252 /* Prepare remote path, handling ~ by assuming cwd is the homedir */ 1253 static char * 1254 prepare_remote_path(struct sftp_conn *conn, const char *path) 1255 { 1256 size_t nslash; 1257 1258 /* Handle ~ prefixed paths */ 1259 if (*path == '\0' || strcmp(path, "~") == 0) 1260 return xstrdup("."); 1261 if (*path != '~') 1262 return xstrdup(path); 1263 if (strncmp(path, "~/", 2) == 0) { 1264 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2)) 1265 return xstrdup("."); 1266 return xstrdup(path + 2 + nslash); 1267 } 1268 if (sftp_can_expand_path(conn)) 1269 return sftp_expand_path(conn, path); 1270 /* No protocol extension */ 1271 error("server expand-path extension is required " 1272 "for ~user paths in SFTP mode"); 1273 return NULL; 1274 } 1275 1276 void 1277 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) 1278 { 1279 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1280 int src_is_dir, target_is_dir; 1281 Attrib a; 1282 struct stat st; 1283 1284 memset(&a, '\0', sizeof(a)); 1285 if (stat(src, &st) != 0) 1286 fatal("stat local \"%s\": %s", src, strerror(errno)); 1287 src_is_dir = S_ISDIR(st.st_mode); 1288 if ((filename = basename(src)) == NULL) 1289 fatal("basename \"%s\": %s", src, strerror(errno)); 1290 1291 /* 1292 * No need to glob here - the local shell already took care of 1293 * the expansions 1294 */ 1295 if ((target = prepare_remote_path(conn, targ)) == NULL) 1296 cleanup_exit(255); 1297 target_is_dir = sftp_remote_is_dir(conn, target); 1298 if (targetshouldbedirectory && !target_is_dir) { 1299 debug("target directory \"%s\" does not exist", target); 1300 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS; 1301 a.perm = st.st_mode | 0700; /* ensure writable */ 1302 if (sftp_mkdir(conn, target, &a, 1) != 0) 1303 cleanup_exit(255); /* error already logged */ 1304 target_is_dir = 1; 1305 } 1306 if (target_is_dir) 1307 abs_dst = sftp_path_append(target, filename); 1308 else { 1309 abs_dst = target; 1310 target = NULL; 1311 } 1312 debug3_f("copying local %s to remote %s", src, abs_dst); 1313 1314 if (src_is_dir && iamrecursive) { 1315 if (sftp_upload_dir(conn, src, abs_dst, pflag, 1316 SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) { 1317 error("failed to upload directory %s to %s", src, targ); 1318 errs = 1; 1319 } 1320 } else if (sftp_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) { 1321 error("failed to upload file %s to %s", src, targ); 1322 errs = 1; 1323 } 1324 1325 free(abs_dst); 1326 free(target); 1327 } 1328 1329 void 1330 source(int argc, char **argv) 1331 { 1332 struct stat stb; 1333 static BUF buffer; 1334 BUF *bp; 1335 off_t i, statbytes; 1336 size_t amt, nr; 1337 int fd = -1, haderr, indx; 1338 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1339 int len; 1340 1341 for (indx = 0; indx < argc; ++indx) { 1342 name = argv[indx]; 1343 statbytes = 0; 1344 len = strlen(name); 1345 while (len > 1 && name[len-1] == '/') 1346 name[--len] = '\0'; 1347 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1) 1348 goto syserr; 1349 if (strchr(name, '\n') != NULL) { 1350 strnvis(encname, name, sizeof(encname), VIS_NL); 1351 name = encname; 1352 } 1353 if (fstat(fd, &stb) == -1) { 1354 syserr: run_err("%s: %s", name, strerror(errno)); 1355 goto next; 1356 } 1357 if (stb.st_size < 0) { 1358 run_err("%s: %s", name, "Negative file size"); 1359 goto next; 1360 } 1361 unset_nonblock(fd); 1362 switch (stb.st_mode & S_IFMT) { 1363 case S_IFREG: 1364 break; 1365 case S_IFDIR: 1366 if (iamrecursive) { 1367 rsource(name, &stb); 1368 goto next; 1369 } 1370 /* FALLTHROUGH */ 1371 default: 1372 run_err("%s: not a regular file", name); 1373 goto next; 1374 } 1375 if ((last = strrchr(name, '/')) == NULL) 1376 last = name; 1377 else 1378 ++last; 1379 curfile = last; 1380 if (pflag) { 1381 if (do_times(remout, verbose_mode, &stb) < 0) 1382 goto next; 1383 } 1384 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1385 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1386 (u_int) (stb.st_mode & FILEMODEMASK), 1387 (long long)stb.st_size, last); 1388 if (verbose_mode) 1389 fmprintf(stderr, "Sending file modes: %s", buf); 1390 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1391 if (response() < 0) 1392 goto next; 1393 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1394 next: if (fd != -1) { 1395 (void) close(fd); 1396 fd = -1; 1397 } 1398 continue; 1399 } 1400 if (showprogress) 1401 start_progress_meter(curfile, stb.st_size, &statbytes); 1402 set_nonblock(remout); 1403 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1404 amt = bp->cnt; 1405 if (i + (off_t)amt > stb.st_size) 1406 amt = stb.st_size - i; 1407 if (!haderr) { 1408 if ((nr = atomicio(read, fd, 1409 bp->buf, amt)) != amt) { 1410 haderr = errno; 1411 memset(bp->buf + nr, 0, amt - nr); 1412 } 1413 } 1414 /* Keep writing after error to retain sync */ 1415 if (haderr) { 1416 (void)atomicio(vwrite, remout, bp->buf, amt); 1417 memset(bp->buf, 0, amt); 1418 continue; 1419 } 1420 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1421 &statbytes) != amt) 1422 haderr = errno; 1423 } 1424 unset_nonblock(remout); 1425 1426 if (fd != -1) { 1427 if (close(fd) == -1 && !haderr) 1428 haderr = errno; 1429 fd = -1; 1430 } 1431 if (!haderr) 1432 (void) atomicio(vwrite, remout, "", 1); 1433 else 1434 run_err("%s: %s", name, strerror(haderr)); 1435 (void) response(); 1436 if (showprogress) 1437 stop_progress_meter(); 1438 } 1439 } 1440 1441 void 1442 rsource(char *name, struct stat *statp) 1443 { 1444 DIR *dirp; 1445 struct dirent *dp; 1446 char *last, *vect[1], path[PATH_MAX]; 1447 1448 if (!(dirp = opendir(name))) { 1449 run_err("%s: %s", name, strerror(errno)); 1450 return; 1451 } 1452 last = strrchr(name, '/'); 1453 if (last == NULL) 1454 last = name; 1455 else 1456 last++; 1457 if (pflag) { 1458 if (do_times(remout, verbose_mode, statp) < 0) { 1459 closedir(dirp); 1460 return; 1461 } 1462 } 1463 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1464 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1465 if (verbose_mode) 1466 fmprintf(stderr, "Entering directory: %s", path); 1467 (void) atomicio(vwrite, remout, path, strlen(path)); 1468 if (response() < 0) { 1469 closedir(dirp); 1470 return; 1471 } 1472 while ((dp = readdir(dirp)) != NULL) { 1473 if (dp->d_ino == 0) 1474 continue; 1475 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1476 continue; 1477 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 1478 run_err("%s/%s: name too long", name, dp->d_name); 1479 continue; 1480 } 1481 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 1482 vect[0] = path; 1483 source(1, vect); 1484 } 1485 (void) closedir(dirp); 1486 (void) atomicio(vwrite, remout, "E\n", 2); 1487 (void) response(); 1488 } 1489 1490 void 1491 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) 1492 { 1493 char *abs_src = NULL; 1494 char *abs_dst = NULL; 1495 glob_t g; 1496 char *filename, *tmp = NULL; 1497 int i, r, err = 0, dst_is_dir; 1498 struct stat st; 1499 1500 memset(&g, 0, sizeof(g)); 1501 1502 /* 1503 * Here, we need remote glob as SFTP can not depend on remote shell 1504 * expansions 1505 */ 1506 if ((abs_src = prepare_remote_path(conn, src)) == NULL) { 1507 err = -1; 1508 goto out; 1509 } 1510 1511 debug3_f("copying remote %s to local %s", abs_src, dst); 1512 if ((r = sftp_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK, 1513 NULL, &g)) != 0) { 1514 if (r == GLOB_NOSPACE) 1515 error("%s: too many glob matches", src); 1516 else 1517 error("%s: %s", src, strerror(ENOENT)); 1518 err = -1; 1519 goto out; 1520 } 1521 1522 /* Did we actually get any matches back from the glob? */ 1523 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { 1524 /* 1525 * If nothing matched but a path returned, then it's probably 1526 * a GLOB_NOCHECK result. Check whether the unglobbed path 1527 * exists so we can give a nice error message early. 1528 */ 1529 if (sftp_stat(conn, g.gl_pathv[0], 1, NULL) != 0) { 1530 error("%s: %s", src, strerror(ENOENT)); 1531 err = -1; 1532 goto out; 1533 } 1534 } 1535 1536 if ((r = stat(dst, &st)) != 0) 1537 debug2_f("stat local \"%s\": %s", dst, strerror(errno)); 1538 dst_is_dir = r == 0 && S_ISDIR(st.st_mode); 1539 1540 if (g.gl_matchc > 1 && !dst_is_dir) { 1541 if (r == 0) { 1542 error("Multiple files match pattern, but destination " 1543 "\"%s\" is not a directory", dst); 1544 err = -1; 1545 goto out; 1546 } 1547 debug2_f("creating destination \"%s\"", dst); 1548 if (mkdir(dst, 0777) != 0) { 1549 error("local mkdir \"%s\": %s", dst, strerror(errno)); 1550 err = -1; 1551 goto out; 1552 } 1553 dst_is_dir = 1; 1554 } 1555 1556 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1557 tmp = xstrdup(g.gl_pathv[i]); 1558 if ((filename = basename(tmp)) == NULL) { 1559 error("basename %s: %s", tmp, strerror(errno)); 1560 err = -1; 1561 goto out; 1562 } 1563 1564 if (dst_is_dir) 1565 abs_dst = sftp_path_append(dst, filename); 1566 else 1567 abs_dst = xstrdup(dst); 1568 1569 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1570 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1571 if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst, 1572 NULL, pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1) 1573 err = -1; 1574 } else { 1575 if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL, 1576 pflag, 0, 0, 1) == -1) 1577 err = -1; 1578 } 1579 free(abs_dst); 1580 abs_dst = NULL; 1581 free(tmp); 1582 tmp = NULL; 1583 } 1584 1585 out: 1586 free(abs_src); 1587 free(tmp); 1588 globfree(&g); 1589 if (err == -1) 1590 errs = 1; 1591 } 1592 1593 1594 #define TYPE_OVERFLOW(type, val) \ 1595 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1596 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1597 (sizeof(type) != 4 && sizeof(type) != 8)) 1598 1599 void 1600 sink(int argc, char **argv, const char *src) 1601 { 1602 static BUF buffer; 1603 struct stat stb; 1604 BUF *bp; 1605 off_t i; 1606 size_t j, count; 1607 int amt, exists, first, ofd; 1608 mode_t mode, omode, mask; 1609 off_t size, statbytes; 1610 unsigned long long ull; 1611 int setimes, targisdir, wrerr; 1612 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 1613 char **patterns = NULL; 1614 size_t n, npatterns = 0; 1615 struct timeval tv[2]; 1616 1617 #define atime tv[0] 1618 #define mtime tv[1] 1619 #define SCREWUP(str) { why = str; goto screwup; } 1620 1621 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1622 SCREWUP("Unexpected off_t/time_t size"); 1623 1624 setimes = targisdir = 0; 1625 mask = umask(0); 1626 if (!pflag) 1627 (void) umask(mask); 1628 if (argc != 1) { 1629 run_err("ambiguous target"); 1630 exit(1); 1631 } 1632 targ = *argv; 1633 if (targetshouldbedirectory) 1634 verifydir(targ); 1635 1636 (void) atomicio(vwrite, remout, "", 1); 1637 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1638 targisdir = 1; 1639 if (src != NULL && !iamrecursive && !Tflag) { 1640 /* 1641 * Prepare to try to restrict incoming filenames to match 1642 * the requested destination file glob. 1643 */ 1644 if (brace_expand(src, &patterns, &npatterns) != 0) 1645 fatal_f("could not expand pattern"); 1646 } 1647 for (first = 1;; first = 0) { 1648 cp = buf; 1649 if (atomicio(read, remin, cp, 1) != 1) 1650 goto done; 1651 if (*cp++ == '\n') 1652 SCREWUP("unexpected <newline>"); 1653 do { 1654 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1655 SCREWUP("lost connection"); 1656 *cp++ = ch; 1657 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1658 *cp = 0; 1659 if (verbose_mode) 1660 fmprintf(stderr, "Sink: %s", buf); 1661 1662 if (buf[0] == '\01' || buf[0] == '\02') { 1663 if (iamremote == 0) { 1664 (void) snmprintf(visbuf, sizeof(visbuf), 1665 NULL, "%s", buf + 1); 1666 (void) atomicio(vwrite, STDERR_FILENO, 1667 visbuf, strlen(visbuf)); 1668 } 1669 if (buf[0] == '\02') 1670 exit(1); 1671 ++errs; 1672 continue; 1673 } 1674 if (buf[0] == 'E') { 1675 (void) atomicio(vwrite, remout, "", 1); 1676 goto done; 1677 } 1678 if (ch == '\n') 1679 *--cp = 0; 1680 1681 cp = buf; 1682 if (*cp == 'T') { 1683 setimes++; 1684 cp++; 1685 if (!isdigit((unsigned char)*cp)) 1686 SCREWUP("mtime.sec not present"); 1687 ull = strtoull(cp, &cp, 10); 1688 if (!cp || *cp++ != ' ') 1689 SCREWUP("mtime.sec not delimited"); 1690 if (TYPE_OVERFLOW(time_t, ull)) 1691 setimes = 0; /* out of range */ 1692 mtime.tv_sec = ull; 1693 mtime.tv_usec = strtol(cp, &cp, 10); 1694 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1695 mtime.tv_usec > 999999) 1696 SCREWUP("mtime.usec not delimited"); 1697 if (!isdigit((unsigned char)*cp)) 1698 SCREWUP("atime.sec not present"); 1699 ull = strtoull(cp, &cp, 10); 1700 if (!cp || *cp++ != ' ') 1701 SCREWUP("atime.sec not delimited"); 1702 if (TYPE_OVERFLOW(time_t, ull)) 1703 setimes = 0; /* out of range */ 1704 atime.tv_sec = ull; 1705 atime.tv_usec = strtol(cp, &cp, 10); 1706 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1707 atime.tv_usec > 999999) 1708 SCREWUP("atime.usec not delimited"); 1709 (void) atomicio(vwrite, remout, "", 1); 1710 continue; 1711 } 1712 if (*cp != 'C' && *cp != 'D') { 1713 /* 1714 * Check for the case "rcp remote:foo\* local:bar". 1715 * In this case, the line "No match." can be returned 1716 * by the shell before the rcp command on the remote is 1717 * executed so the ^Aerror_message convention isn't 1718 * followed. 1719 */ 1720 if (first) { 1721 run_err("%s", cp); 1722 exit(1); 1723 } 1724 SCREWUP("expected control record"); 1725 } 1726 mode = 0; 1727 for (++cp; cp < buf + 5; cp++) { 1728 if (*cp < '0' || *cp > '7') 1729 SCREWUP("bad mode"); 1730 mode = (mode << 3) | (*cp - '0'); 1731 } 1732 if (!pflag) 1733 mode &= ~mask; 1734 if (*cp++ != ' ') 1735 SCREWUP("mode not delimited"); 1736 1737 if (!isdigit((unsigned char)*cp)) 1738 SCREWUP("size not present"); 1739 ull = strtoull(cp, &cp, 10); 1740 if (!cp || *cp++ != ' ') 1741 SCREWUP("size not delimited"); 1742 if (TYPE_OVERFLOW(off_t, ull)) 1743 SCREWUP("size out of range"); 1744 size = (off_t)ull; 1745 1746 if (*cp == '\0' || strchr(cp, '/') != NULL || 1747 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1748 run_err("error: unexpected filename: %s", cp); 1749 exit(1); 1750 } 1751 if (npatterns > 0) { 1752 for (n = 0; n < npatterns; n++) { 1753 if (strcmp(patterns[n], cp) == 0 || 1754 fnmatch(patterns[n], cp, 0) == 0) 1755 break; 1756 } 1757 if (n >= npatterns) { 1758 debug2_f("incoming filename \"%s\" does not " 1759 "match any of %zu expected patterns", cp, 1760 npatterns); 1761 for (n = 0; n < npatterns; n++) { 1762 debug3_f("expected pattern %zu: \"%s\"", 1763 n, patterns[n]); 1764 } 1765 SCREWUP("filename does not match request"); 1766 } 1767 } 1768 if (targisdir) { 1769 static char *namebuf; 1770 static size_t cursize; 1771 size_t need; 1772 1773 need = strlen(targ) + strlen(cp) + 250; 1774 if (need > cursize) { 1775 free(namebuf); 1776 namebuf = xmalloc(need); 1777 cursize = need; 1778 } 1779 (void) snprintf(namebuf, need, "%s%s%s", targ, 1780 strcmp(targ, "/") ? "/" : "", cp); 1781 np = namebuf; 1782 } else 1783 np = targ; 1784 curfile = cp; 1785 exists = stat(np, &stb) == 0; 1786 if (buf[0] == 'D') { 1787 int mod_flag = pflag; 1788 if (!iamrecursive) 1789 SCREWUP("received directory without -r"); 1790 if (exists) { 1791 if (!S_ISDIR(stb.st_mode)) { 1792 errno = ENOTDIR; 1793 goto bad; 1794 } 1795 if (pflag) 1796 (void) chmod(np, mode); 1797 } else { 1798 /* Handle copying from a read-only directory */ 1799 mod_flag = 1; 1800 if (mkdir(np, mode | S_IRWXU) == -1) 1801 goto bad; 1802 } 1803 vect[0] = xstrdup(np); 1804 sink(1, vect, src); 1805 if (setimes) { 1806 setimes = 0; 1807 (void) utimes(vect[0], tv); 1808 } 1809 if (mod_flag) 1810 (void) chmod(vect[0], mode); 1811 free(vect[0]); 1812 continue; 1813 } 1814 omode = mode; 1815 mode |= S_IWUSR; 1816 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1817 bad: run_err("%s: %s", np, strerror(errno)); 1818 continue; 1819 } 1820 (void) atomicio(vwrite, remout, "", 1); 1821 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1822 (void) close(ofd); 1823 continue; 1824 } 1825 cp = bp->buf; 1826 wrerr = 0; 1827 1828 /* 1829 * NB. do not use run_err() unless immediately followed by 1830 * exit() below as it may send a spurious reply that might 1831 * desyncronise us from the peer. Use note_err() instead. 1832 */ 1833 statbytes = 0; 1834 if (showprogress) 1835 start_progress_meter(curfile, size, &statbytes); 1836 set_nonblock(remin); 1837 for (count = i = 0; i < size; i += bp->cnt) { 1838 amt = bp->cnt; 1839 if (i + amt > size) 1840 amt = size - i; 1841 count += amt; 1842 do { 1843 j = atomicio6(read, remin, cp, amt, 1844 scpio, &statbytes); 1845 if (j == 0) { 1846 run_err("%s", j != EPIPE ? 1847 strerror(errno) : 1848 "dropped connection"); 1849 exit(1); 1850 } 1851 amt -= j; 1852 cp += j; 1853 } while (amt > 0); 1854 1855 if (count == bp->cnt) { 1856 /* Keep reading so we stay sync'd up. */ 1857 if (!wrerr) { 1858 if (atomicio(vwrite, ofd, bp->buf, 1859 count) != count) { 1860 note_err("%s: %s", np, 1861 strerror(errno)); 1862 wrerr = 1; 1863 } 1864 } 1865 count = 0; 1866 cp = bp->buf; 1867 } 1868 } 1869 unset_nonblock(remin); 1870 if (count != 0 && !wrerr && 1871 atomicio(vwrite, ofd, bp->buf, count) != count) { 1872 note_err("%s: %s", np, strerror(errno)); 1873 wrerr = 1; 1874 } 1875 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1876 ftruncate(ofd, size) != 0) 1877 note_err("%s: truncate: %s", np, strerror(errno)); 1878 if (pflag) { 1879 if (exists || omode != mode) 1880 if (fchmod(ofd, omode)) { 1881 note_err("%s: set mode: %s", 1882 np, strerror(errno)); 1883 } 1884 } else { 1885 if (!exists && omode != mode) 1886 if (fchmod(ofd, omode & ~mask)) { 1887 note_err("%s: set mode: %s", 1888 np, strerror(errno)); 1889 } 1890 } 1891 if (close(ofd) == -1) 1892 note_err("%s: close: %s", np, strerror(errno)); 1893 (void) response(); 1894 if (showprogress) 1895 stop_progress_meter(); 1896 if (setimes && !wrerr) { 1897 setimes = 0; 1898 if (utimes(np, tv) == -1) { 1899 note_err("%s: set times: %s", 1900 np, strerror(errno)); 1901 } 1902 } 1903 /* If no error was noted then signal success for this file */ 1904 if (note_err(NULL) == 0) 1905 (void) atomicio(vwrite, remout, "", 1); 1906 } 1907 done: 1908 for (n = 0; n < npatterns; n++) 1909 free(patterns[n]); 1910 free(patterns); 1911 return; 1912 screwup: 1913 for (n = 0; n < npatterns; n++) 1914 free(patterns[n]); 1915 free(patterns); 1916 run_err("protocol error: %s", why); 1917 exit(1); 1918 } 1919 1920 void 1921 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, 1922 char *src, char *targ) 1923 { 1924 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1925 char *abs_src = NULL, *tmp = NULL; 1926 glob_t g; 1927 int i, r, targetisdir, err = 0; 1928 1929 if ((filename = basename(src)) == NULL) 1930 fatal("basename %s: %s", src, strerror(errno)); 1931 1932 if ((abs_src = prepare_remote_path(from, src)) == NULL || 1933 (target = prepare_remote_path(to, targ)) == NULL) 1934 cleanup_exit(255); 1935 memset(&g, 0, sizeof(g)); 1936 1937 targetisdir = sftp_remote_is_dir(to, target); 1938 if (!targetisdir && targetshouldbedirectory) { 1939 error("%s: destination is not a directory", targ); 1940 err = -1; 1941 goto out; 1942 } 1943 1944 debug3_f("copying remote %s to remote %s", abs_src, target); 1945 if ((r = sftp_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK, 1946 NULL, &g)) != 0) { 1947 if (r == GLOB_NOSPACE) 1948 error("%s: too many glob matches", src); 1949 else 1950 error("%s: %s", src, strerror(ENOENT)); 1951 err = -1; 1952 goto out; 1953 } 1954 1955 /* Did we actually get any matches back from the glob? */ 1956 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { 1957 /* 1958 * If nothing matched but a path returned, then it's probably 1959 * a GLOB_NOCHECK result. Check whether the unglobbed path 1960 * exists so we can give a nice error message early. 1961 */ 1962 if (sftp_stat(from, g.gl_pathv[0], 1, NULL) != 0) { 1963 error("%s: %s", src, strerror(ENOENT)); 1964 err = -1; 1965 goto out; 1966 } 1967 } 1968 1969 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1970 tmp = xstrdup(g.gl_pathv[i]); 1971 if ((filename = basename(tmp)) == NULL) { 1972 error("basename %s: %s", tmp, strerror(errno)); 1973 err = -1; 1974 goto out; 1975 } 1976 1977 if (targetisdir) 1978 abs_dst = sftp_path_append(target, filename); 1979 else 1980 abs_dst = xstrdup(target); 1981 1982 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1983 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1984 if (sftp_crossload_dir(from, to, g.gl_pathv[i], abs_dst, 1985 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) 1986 err = -1; 1987 } else { 1988 if (sftp_crossload(from, to, g.gl_pathv[i], abs_dst, 1989 NULL, pflag) == -1) 1990 err = -1; 1991 } 1992 free(abs_dst); 1993 abs_dst = NULL; 1994 free(tmp); 1995 tmp = NULL; 1996 } 1997 1998 out: 1999 free(abs_src); 2000 free(abs_dst); 2001 free(target); 2002 free(tmp); 2003 globfree(&g); 2004 if (err == -1) 2005 errs = 1; 2006 } 2007 2008 int 2009 response(void) 2010 { 2011 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 2012 2013 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 2014 lostconn(0); 2015 2016 cp = rbuf; 2017 switch (resp) { 2018 case 0: /* ok */ 2019 return (0); 2020 default: 2021 *cp++ = resp; 2022 /* FALLTHROUGH */ 2023 case 1: /* error, followed by error msg */ 2024 case 2: /* fatal error, "" */ 2025 do { 2026 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 2027 lostconn(0); 2028 *cp++ = ch; 2029 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 2030 2031 if (!iamremote) { 2032 cp[-1] = '\0'; 2033 (void) snmprintf(visbuf, sizeof(visbuf), 2034 NULL, "%s\n", rbuf); 2035 (void) atomicio(vwrite, STDERR_FILENO, 2036 visbuf, strlen(visbuf)); 2037 } 2038 ++errs; 2039 if (resp == 1) 2040 return (-1); 2041 exit(1); 2042 } 2043 /* NOTREACHED */ 2044 } 2045 2046 void 2047 usage(void) 2048 { 2049 (void) fprintf(stderr, 2050 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" 2051 " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n" 2052 " [-P port] [-S program] [-X sftp_option] source ... target\n"); 2053 exit(1); 2054 } 2055 2056 void 2057 run_err(const char *fmt,...) 2058 { 2059 static FILE *fp; 2060 va_list ap; 2061 2062 ++errs; 2063 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 2064 (void) fprintf(fp, "%c", 0x01); 2065 (void) fprintf(fp, "scp: "); 2066 va_start(ap, fmt); 2067 (void) vfprintf(fp, fmt, ap); 2068 va_end(ap); 2069 (void) fprintf(fp, "\n"); 2070 (void) fflush(fp); 2071 } 2072 2073 if (!iamremote) { 2074 va_start(ap, fmt); 2075 vfmprintf(stderr, fmt, ap); 2076 va_end(ap); 2077 fprintf(stderr, "\n"); 2078 } 2079 } 2080 2081 /* 2082 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 2083 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 2084 * any active error at the end of the transfer. 2085 */ 2086 int 2087 note_err(const char *fmt, ...) 2088 { 2089 static char *emsg; 2090 va_list ap; 2091 2092 /* Replay any previously-noted error */ 2093 if (fmt == NULL) { 2094 if (emsg == NULL) 2095 return 0; 2096 run_err("%s", emsg); 2097 free(emsg); 2098 emsg = NULL; 2099 return -1; 2100 } 2101 2102 errs++; 2103 /* Prefer first-noted error */ 2104 if (emsg != NULL) 2105 return -1; 2106 2107 va_start(ap, fmt); 2108 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 2109 va_end(ap); 2110 return -1; 2111 } 2112 2113 void 2114 verifydir(char *cp) 2115 { 2116 struct stat stb; 2117 2118 if (!stat(cp, &stb)) { 2119 if (S_ISDIR(stb.st_mode)) 2120 return; 2121 errno = ENOTDIR; 2122 } 2123 run_err("%s: %s", cp, strerror(errno)); 2124 killchild(0); 2125 } 2126 2127 int 2128 okname(char *cp0) 2129 { 2130 int c; 2131 char *cp; 2132 2133 cp = cp0; 2134 do { 2135 c = (int)*cp; 2136 if (c & 0200) 2137 goto bad; 2138 if (!isalpha(c) && !isdigit((unsigned char)c)) { 2139 switch (c) { 2140 case '\'': 2141 case '"': 2142 case '`': 2143 case ' ': 2144 case '#': 2145 goto bad; 2146 default: 2147 break; 2148 } 2149 } 2150 } while (*++cp); 2151 return (1); 2152 2153 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 2154 return (0); 2155 } 2156 2157 BUF * 2158 allocbuf(BUF *bp, int fd, int blksize) 2159 { 2160 size_t size; 2161 struct stat stb; 2162 2163 if (fstat(fd, &stb) == -1) { 2164 run_err("fstat: %s", strerror(errno)); 2165 return (0); 2166 } 2167 size = ROUNDUP(stb.st_blksize, blksize); 2168 if (size == 0) 2169 size = blksize; 2170 if (bp->cnt >= size) 2171 return (bp); 2172 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 2173 bp->cnt = size; 2174 return (bp); 2175 } 2176 2177 void 2178 lostconn(int signo) 2179 { 2180 if (!iamremote) 2181 (void)write(STDERR_FILENO, "lost connection\n", 16); 2182 if (signo) 2183 _exit(1); 2184 else 2185 exit(1); 2186 } 2187 2188 void 2189 cleanup_exit(int i) 2190 { 2191 if (remin > 0) 2192 close(remin); 2193 if (remout > 0) 2194 close(remout); 2195 if (remin2 > 0) 2196 close(remin2); 2197 if (remout2 > 0) 2198 close(remout2); 2199 if (do_cmd_pid > 0) 2200 (void)waitpid(do_cmd_pid, NULL, 0); 2201 if (do_cmd_pid2 > 0) 2202 (void)waitpid(do_cmd_pid2, NULL, 0); 2203 exit(i); 2204 } 2205