scp.c revision 1.45
1 /* $NetBSD: scp.c,v 1.45 2026/04/08 18:58:41 christos Exp $ */ 2 /* $OpenBSD: scp.c,v 1.273 2026/04/02 07:42:16 djm Exp $ */ 3 4 /* 5 * scp - secure remote copy. This is basically patched BSD rcp which 6 * uses ssh to do the data transfer (instead of using rcmd). 7 * 8 * NOTE: This version should NOT be suid root. (This uses ssh to 9 * do the transfer and ssh has the necessary privileges.) 10 * 11 * 1995 Timo Rinne <tri (at) iki.fi>, Tatu Ylonen <ylo (at) cs.hut.fi> 12 * 13 * As far as I am concerned, the code I have written for this software 14 * can be used freely for any purpose. Any derived versions of this 15 * software must be clearly marked as such, and if the derived work is 16 * incompatible with the protocol description in the RFC file, it must be 17 * called by a name other than "ssh" or "Secure Shell". 18 */ 19 /* 20 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 21 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the above copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 33 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 34 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 35 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 36 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 41 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44 /* 45 * Parts from: 46 * 47 * Copyright (c) 1983, 1990, 1992, 1993, 1995 48 * The Regents of the University of California. All rights reserved. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 */ 75 76 #include "includes.h" 77 __RCSID("$NetBSD: scp.c,v 1.45 2026/04/08 18:58:41 christos Exp $"); 78 79 #include <sys/param.h> /* roundup MAX */ 80 #include <sys/types.h> 81 #include <sys/stat.h> 82 #include <sys/time.h> 83 #include <sys/wait.h> 84 #include <sys/uio.h> 85 86 #include <ctype.h> 87 #include <dirent.h> 88 #include <errno.h> 89 #include <fcntl.h> 90 #include <fnmatch.h> 91 #include <glob.h> 92 #include <libgen.h> 93 #include <locale.h> 94 #include <poll.h> 95 #include <pwd.h> 96 #include <signal.h> 97 #include <stdarg.h> 98 #include <stdint.h> 99 #include <stdio.h> 100 #include <stdlib.h> 101 #include <string.h> 102 #include <time.h> 103 #include <unistd.h> 104 #include <limits.h> 105 #include <util.h> 106 #include <vis.h> 107 108 #include "xmalloc.h" 109 #include "ssh.h" 110 #include "atomicio.h" 111 #include "pathnames.h" 112 #include "log.h" 113 #include "misc.h" 114 #include "progressmeter.h" 115 #include "utf8.h" 116 #include "sftp.h" 117 #include "fmt_scaled.h" 118 119 #include "sftp-common.h" 120 #include "sftp-client.h" 121 122 #define COPY_BUFLEN 16384 123 124 int do_cmd(const char *, const char *, const char *, int, int, const char *, int *, int *, pid_t *); 125 int do_cmd2(char *, char *, int, char *, int, int); 126 127 static char empty[] = ""; 128 129 /* Struct for addargs */ 130 arglist args; 131 arglist remote_remote_args; 132 133 /* Bandwidth limit */ 134 long long limit_kbps = 0; 135 struct bwlimit bwlimit; 136 137 /* Name of current file being transferred. */ 138 char *curfile; 139 140 /* This is set to non-zero to enable verbose mode. */ 141 int verbose_mode = 0; 142 LogLevel log_level = SYSLOG_LEVEL_INFO; 143 144 /* This is set to zero if the progressmeter is not desired. */ 145 int showprogress = 1; 146 147 /* 148 * This is set to non-zero if remote-remote copy should be piped 149 * through this process. 150 */ 151 int throughlocal = 1; 152 153 /* Non-standard port to use for the ssh connection or -1. */ 154 int sshport = -1; 155 156 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 157 #ifdef RESCUEDIR 158 const char *ssh_program = RESCUEDIR "/ssh"; 159 #else 160 const char *ssh_program = _PATH_SSH_PROGRAM; 161 #endif 162 163 /* This is used to store the pid of ssh_program */ 164 pid_t do_cmd_pid = -1; 165 pid_t do_cmd_pid2 = -1; 166 167 /* SFTP copy parameters */ 168 size_t sftp_copy_buflen; 169 size_t sftp_nrequests; 170 171 /* Needed for sftp */ 172 volatile sig_atomic_t interrupted = 0; 173 174 int sftp_glob(struct sftp_conn *, const char *, int, 175 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ 176 177 __dead static void 178 killchild(int signo) 179 { 180 if (do_cmd_pid > 1) { 181 kill(do_cmd_pid, signo ? signo : SIGTERM); 182 (void)waitpid(do_cmd_pid, NULL, 0); 183 } 184 if (do_cmd_pid2 > 1) { 185 kill(do_cmd_pid2, signo ? signo : SIGTERM); 186 (void)waitpid(do_cmd_pid2, NULL, 0); 187 } 188 189 if (signo) 190 _exit(1); 191 exit(1); 192 } 193 194 static void 195 suspone(int pid, int signo) 196 { 197 int status; 198 199 if (pid > 1) { 200 kill(pid, signo); 201 while (waitpid(pid, &status, WUNTRACED) == -1 && 202 errno == EINTR) 203 ; 204 } 205 } 206 207 static void 208 suspchild(int signo) 209 { 210 int save_errno = errno; 211 suspone(do_cmd_pid, signo); 212 suspone(do_cmd_pid2, signo); 213 kill(getpid(), SIGSTOP); 214 errno = save_errno; 215 } 216 217 static int 218 do_local_cmd(arglist *a) 219 { 220 char *cp; 221 int status; 222 pid_t pid; 223 224 if (a->num == 0) 225 fatal("do_local_cmd: no arguments"); 226 227 if (verbose_mode) { 228 cp = argv_assemble(a->num, a->list); 229 fmprintf(stderr, "Executing: %s\n", cp); 230 free(cp); 231 } 232 if ((pid = fork()) == -1) 233 fatal("do_local_cmd: fork: %s", strerror(errno)); 234 235 if (pid == 0) { 236 execvp(a->list[0], a->list); 237 perror(a->list[0]); 238 exit(1); 239 } 240 241 do_cmd_pid = pid; 242 ssh_signal(SIGTERM, killchild); 243 ssh_signal(SIGINT, killchild); 244 ssh_signal(SIGHUP, killchild); 245 246 while (waitpid(pid, &status, 0) == -1) 247 if (errno != EINTR) 248 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 249 250 do_cmd_pid = -1; 251 252 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 253 return (-1); 254 255 return (0); 256 } 257 258 /* 259 * This function executes the given command as the specified user on the 260 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 261 * assigns the input and output file descriptors on success. 262 */ 263 264 int 265 do_cmd(const char *program, const char *host, const char *remuser, int port, int subsystem, 266 const char *cmd, int *fdin, int *fdout, pid_t *pid) 267 { 268 int sv[2]; 269 270 if (verbose_mode) 271 fmprintf(stderr, 272 "Executing: program %s host %s, user %s, command %s\n", 273 program, host, 274 remuser ? remuser : "(unspecified)", cmd); 275 276 if (port == -1) 277 port = sshport; 278 279 /* Create a socket pair for communicating with ssh. */ 280 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) 281 fatal("socketpair: %s", strerror(errno)); 282 283 ssh_signal(SIGTSTP, suspchild); 284 ssh_signal(SIGTTIN, suspchild); 285 ssh_signal(SIGTTOU, suspchild); 286 287 /* Fork a child to execute the command on the remote host using ssh. */ 288 *pid = fork(); 289 switch (*pid) { 290 case -1: 291 fatal("fork: %s", strerror(errno)); 292 case 0: 293 /* Child. */ 294 if (dup2(sv[0], STDIN_FILENO) == -1 || 295 dup2(sv[0], STDOUT_FILENO) == -1) { 296 perror("dup2"); 297 _exit(1); 298 } 299 close(sv[0]); 300 close(sv[1]); 301 replacearg(&args, 0, "%s", program); 302 if (port != -1) { 303 addargs(&args, "-p"); 304 addargs(&args, "%d", port); 305 } 306 if (remuser != NULL) { 307 addargs(&args, "-l"); 308 addargs(&args, "%s", remuser); 309 } 310 if (subsystem) 311 addargs(&args, "-s"); 312 addargs(&args, "--"); 313 addargs(&args, "%s", host); 314 addargs(&args, "%s", cmd); 315 316 execvp(program, args.list); 317 perror(program); 318 _exit(1); 319 default: 320 /* Parent. Close the other side, and return the local side. */ 321 close(sv[0]); 322 *fdin = sv[1]; 323 *fdout = sv[1]; 324 ssh_signal(SIGTERM, killchild); 325 ssh_signal(SIGINT, killchild); 326 ssh_signal(SIGHUP, killchild); 327 return 0; 328 } 329 } 330 331 /* 332 * This function executes a command similar to do_cmd(), but expects the 333 * input and output descriptors to be setup by a previous call to do_cmd(). 334 * This way the input and output of two commands can be connected. 335 */ 336 int 337 do_cmd2(char *host, char *remuser, int port, char *cmd, 338 int fdin, int fdout) 339 { 340 int status; 341 pid_t pid; 342 343 if (verbose_mode) 344 fmprintf(stderr, 345 "Executing: 2nd program %s host %s, user %s, command %s\n", 346 ssh_program, host, 347 remuser ? remuser : "(unspecified)", cmd); 348 349 if (port == -1) 350 port = sshport; 351 352 /* Fork a child to execute the command on the remote host using ssh. */ 353 pid = fork(); 354 if (pid == 0) { 355 if (dup2(fdin, 0) == -1) 356 perror("dup2"); 357 if (dup2(fdout, 1) == -1) 358 perror("dup2"); 359 360 replacearg(&args, 0, "%s", ssh_program); 361 if (port != -1) { 362 addargs(&args, "-p"); 363 addargs(&args, "%d", port); 364 } 365 if (remuser != NULL) { 366 addargs(&args, "-l"); 367 addargs(&args, "%s", remuser); 368 } 369 addargs(&args, "-oBatchMode=yes"); 370 addargs(&args, "--"); 371 addargs(&args, "%s", host); 372 addargs(&args, "%s", cmd); 373 374 execvp(ssh_program, args.list); 375 perror(ssh_program); 376 exit(1); 377 } else if (pid == -1) { 378 fatal("fork: %s", strerror(errno)); 379 } 380 while (waitpid(pid, &status, 0) == -1) 381 if (errno != EINTR) 382 fatal("do_cmd2: waitpid: %s", strerror(errno)); 383 return 0; 384 } 385 386 typedef struct { 387 size_t cnt; 388 char *buf; 389 } BUF; 390 391 BUF *allocbuf(BUF *, int, int); 392 __dead static void lostconn(int); 393 int okname(char *); 394 void run_err(const char *,...) 395 __attribute__((__format__ (printf, 1, 2))) 396 __attribute__((__nonnull__ (1))); 397 int note_err(const char *,...) 398 __attribute__((__format__ (printf, 1, 2))); 399 void verifydir(char *); 400 401 struct passwd *pwd; 402 uid_t userid; 403 int errs, remin, remout, remin2, remout2; 404 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 405 406 #define CMDNEEDS 64 407 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 408 409 enum scp_mode_e { 410 MODE_SCP, 411 MODE_SFTP 412 }; 413 414 int response(void); 415 void rsource(char *, struct stat *); 416 void sink(int, char *[], const char *); 417 void source(int, char *[]); 418 static void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); 419 static void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); 420 __dead static void usage(void); 421 422 void source_sftp(int, char *, char *, struct sftp_conn *); 423 void sink_sftp(int, char *, const char *, struct sftp_conn *); 424 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, 425 char *, char *); 426 427 int 428 main(int argc, char **argv) 429 { 430 int ch, fflag, tflag, status, r, n; 431 char **newargv, *argv0; 432 const char *errstr; 433 extern char *optarg; 434 extern int optind; 435 enum scp_mode_e mode = MODE_SFTP; 436 char *sftp_direct = NULL; 437 long long llv; 438 439 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 440 sanitise_stdfd(); 441 442 setlocale(LC_CTYPE, ""); 443 444 /* Copy argv, because we modify it */ 445 argv0 = argv[0]; 446 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 447 for (n = 0; n < argc; n++) 448 newargv[n] = xstrdup(argv[n]); 449 argv = newargv; 450 451 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 452 453 memset(&args, '\0', sizeof(args)); 454 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 455 args.list = remote_remote_args.list = NULL; 456 addargs(&args, "%s", ssh_program); 457 addargs(&args, "-x"); 458 addargs(&args, "-oPermitLocalCommand=no"); 459 addargs(&args, "-oClearAllForwardings=yes"); 460 addargs(&args, "-oRemoteCommand=none"); 461 addargs(&args, "-oRequestTTY=no"); 462 addargs(&args, "-oControlMaster=no"); 463 464 fflag = Tflag = tflag = 0; 465 while ((ch = getopt(argc, argv, 466 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) { 467 switch (ch) { 468 /* User-visible flags. */ 469 case '1': 470 fatal("SSH protocol v.1 is no longer supported"); 471 break; 472 case '2': 473 /* Ignored */ 474 break; 475 case 'A': 476 case '4': 477 case '6': 478 case 'C': 479 addargs(&args, "-%c", ch); 480 addargs(&remote_remote_args, "-%c", ch); 481 break; 482 case 'D': 483 sftp_direct = optarg; 484 break; 485 case '3': 486 throughlocal = 1; 487 break; 488 case 'R': 489 throughlocal = 0; 490 break; 491 case 'o': 492 case 'c': 493 case 'i': 494 case 'F': 495 case 'J': 496 addargs(&remote_remote_args, "-%c", ch); 497 addargs(&remote_remote_args, "%s", optarg); 498 addargs(&args, "-%c", ch); 499 addargs(&args, "%s", optarg); 500 break; 501 case 'O': 502 mode = MODE_SCP; 503 break; 504 case 's': 505 mode = MODE_SFTP; 506 break; 507 case 'P': 508 sshport = a2port(optarg); 509 if (sshport <= 0) 510 fatal("bad port \"%s\"\n", optarg); 511 break; 512 case 'B': 513 addargs(&remote_remote_args, "-oBatchmode=yes"); 514 addargs(&args, "-oBatchmode=yes"); 515 break; 516 case 'l': 517 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 518 &errstr); 519 if (errstr != NULL) 520 usage(); 521 limit_kbps *= 1024; /* kbps */ 522 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 523 break; 524 case 'p': 525 pflag = 1; 526 break; 527 case 'r': 528 iamrecursive = 1; 529 break; 530 case 'S': 531 ssh_program = xstrdup(optarg); 532 break; 533 case 'v': 534 addargs(&args, "-v"); 535 addargs(&remote_remote_args, "-v"); 536 if (verbose_mode == 0) 537 log_level = SYSLOG_LEVEL_DEBUG1; 538 else if (log_level < SYSLOG_LEVEL_DEBUG3) 539 log_level++; 540 verbose_mode = 1; 541 break; 542 case 'q': 543 addargs(&args, "-q"); 544 addargs(&remote_remote_args, "-q"); 545 showprogress = 0; 546 break; 547 case 'X': 548 /* Please keep in sync with sftp.c -X */ 549 if (strncmp(optarg, "buffer=", 7) == 0) { 550 r = scan_scaled(optarg + 7, &llv); 551 if (r == 0 && (llv <= 0 || llv > 256 * 1024)) { 552 r = -1; 553 errno = EINVAL; 554 } 555 if (r == -1) { 556 fatal("Invalid buffer size \"%s\": %s", 557 optarg + 7, strerror(errno)); 558 } 559 sftp_copy_buflen = (size_t)llv; 560 } else if (strncmp(optarg, "nrequests=", 10) == 0) { 561 llv = strtonum(optarg + 10, 1, 256 * 1024, 562 &errstr); 563 if (errstr != NULL) { 564 fatal("Invalid number of requests " 565 "\"%s\": %s", optarg + 10, errstr); 566 } 567 sftp_nrequests = (size_t)llv; 568 } else { 569 fatal("Invalid -X option"); 570 } 571 break; 572 573 /* Server options. */ 574 case 'd': 575 targetshouldbedirectory = 1; 576 break; 577 case 'f': /* "from" */ 578 iamremote = 1; 579 fflag = 1; 580 break; 581 case 't': /* "to" */ 582 iamremote = 1; 583 tflag = 1; 584 break; 585 case 'T': 586 Tflag = 1; 587 break; 588 default: 589 usage(); 590 } 591 } 592 argc -= optind; 593 argv += optind; 594 595 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 596 597 /* Do this last because we want the user to be able to override it */ 598 addargs(&args, "-oForwardAgent=no"); 599 600 if (iamremote) 601 mode = MODE_SCP; 602 603 if ((pwd = getpwuid(userid = getuid())) == NULL) 604 fatal("unknown user %u", (u_int) userid); 605 606 if (!isatty(STDOUT_FILENO)) 607 showprogress = 0; 608 609 if (pflag) { 610 /* Cannot pledge: -p allows setuid/setgid files... */ 611 } else { 612 #ifdef __OpenBSD__ 613 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 614 NULL) == -1) { 615 perror("pledge"); 616 exit(1); 617 } 618 #endif 619 } 620 621 remin = STDIN_FILENO; 622 remout = STDOUT_FILENO; 623 624 if (fflag) { 625 /* Follow "protocol", send data. */ 626 (void) response(); 627 source(argc, argv); 628 exit(errs != 0); 629 } 630 if (tflag) { 631 /* Receive data. */ 632 sink(argc, argv, NULL); 633 exit(errs != 0); 634 } 635 if (argc < 2) 636 usage(); 637 if (argc > 2) 638 targetshouldbedirectory = 1; 639 640 remin = remout = -1; 641 do_cmd_pid = -1; 642 /* Command to be executed on remote system using "ssh". */ 643 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 644 verbose_mode ? " -v" : "", 645 iamrecursive ? " -r" : "", pflag ? " -p" : "", 646 targetshouldbedirectory ? " -d" : ""); 647 648 (void) ssh_signal(SIGPIPE, lostconn); 649 650 if (colon(argv[argc - 1])) /* Dest is remote host. */ 651 toremote(argc, argv, mode, sftp_direct); 652 else { 653 if (targetshouldbedirectory) 654 verifydir(argv[argc - 1]); 655 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */ 656 } 657 /* 658 * Finally check the exit status of the ssh process, if one was forked 659 * and no error has occurred yet 660 */ 661 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) { 662 if (remin != -1) 663 (void) close(remin); 664 if (remout != -1) 665 (void) close(remout); 666 if (waitpid(do_cmd_pid, &status, 0) == -1) 667 errs = 1; 668 else { 669 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 670 errs = 1; 671 } 672 } 673 exit(errs != 0); 674 } 675 676 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 677 static int 678 scpio(void *_cnt, size_t s) 679 { 680 off_t *cnt = (off_t *)_cnt; 681 682 *cnt += s; 683 refresh_progress_meter(0); 684 if (limit_kbps > 0) 685 bandwidth_limit(&bwlimit, s); 686 return 0; 687 } 688 689 static int 690 do_times(int fd, int verb, const struct stat *sb) 691 { 692 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 693 char buf[(20 + 7 + 2) * 2 + 2]; 694 695 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 696 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 697 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 698 if (verb) { 699 fprintf(stderr, "File mtime %lld atime %lld\n", 700 (long long)sb->st_mtime, (long long)sb->st_atime); 701 fprintf(stderr, "Sending file timestamps: %s", buf); 702 } 703 (void) atomicio(vwrite, fd, buf, strlen(buf)); 704 return (response()); 705 } 706 707 static int 708 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 709 char **pathp) 710 { 711 int r; 712 713 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 714 if (r == 0 && *pathp == NULL) 715 *pathp = xstrdup("."); 716 return r; 717 } 718 719 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 720 static int 721 append(char *cp, char ***ap, size_t *np) 722 { 723 char **tmp; 724 725 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 726 return -1; 727 tmp[(*np)] = cp; 728 (*np)++; 729 *ap = tmp; 730 return 0; 731 } 732 733 /* 734 * Finds the start and end of the first brace pair in the pattern. 735 * returns 0 on success or -1 for invalid patterns. 736 */ 737 static int 738 find_brace(const char *pattern, int *startp, int *endp) 739 { 740 int i; 741 int in_bracket, brace_level; 742 743 *startp = *endp = -1; 744 in_bracket = brace_level = 0; 745 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 746 switch (pattern[i]) { 747 case '\\': 748 /* skip next character */ 749 if (pattern[i + 1] != '\0') 750 i++; 751 break; 752 case '[': 753 in_bracket = 1; 754 break; 755 case ']': 756 in_bracket = 0; 757 break; 758 case '{': 759 if (in_bracket) 760 break; 761 if (pattern[i + 1] == '}') { 762 /* Protect a single {}, for find(1), like csh */ 763 i++; /* skip */ 764 break; 765 } 766 if (*startp == -1) 767 *startp = i; 768 brace_level++; 769 break; 770 case '}': 771 if (in_bracket) 772 break; 773 if (*startp < 0) { 774 /* Unbalanced brace */ 775 return -1; 776 } 777 if (--brace_level <= 0) 778 *endp = i; 779 break; 780 } 781 } 782 /* unbalanced brackets/braces */ 783 if (*endp < 0 && (*startp >= 0 || in_bracket)) 784 return -1; 785 return 0; 786 } 787 788 /* 789 * Assembles and records a successfully-expanded pattern, returns -1 on 790 * alloc failure. 791 */ 792 static int 793 emit_expansion(const char *pattern, int brace_start, int brace_end, 794 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 795 { 796 char *cp; 797 size_t pattern_len; 798 int o = 0, tail_len; 799 800 if ((pattern_len = strlen(pattern)) == 0 || pattern_len >= INT_MAX) 801 return -1; 802 803 tail_len = strlen(pattern + brace_end + 1); 804 if ((cp = malloc(brace_start + (sel_end - sel_start) + 805 tail_len + 1)) == NULL) 806 return -1; 807 808 /* Pattern before initial brace */ 809 if (brace_start > 0) { 810 memcpy(cp, pattern, brace_start); 811 o = brace_start; 812 } 813 /* Current braced selection */ 814 if (sel_end - sel_start > 0) { 815 memcpy(cp + o, pattern + sel_start, 816 sel_end - sel_start); 817 o += sel_end - sel_start; 818 } 819 /* Remainder of pattern after closing brace */ 820 if (tail_len > 0) { 821 memcpy(cp + o, pattern + brace_end + 1, tail_len); 822 o += tail_len; 823 } 824 cp[o] = '\0'; 825 if (append(cp, patternsp, npatternsp) != 0) { 826 free(cp); 827 return -1; 828 } 829 return 0; 830 } 831 832 /* 833 * Expand the first encountered brace in pattern, appending the expanded 834 * patterns it yielded to the *patternsp array. 835 * 836 * Returns 0 on success or -1 on allocation failure. 837 * 838 * Signals whether expansion was performed via *expanded and whether 839 * pattern was invalid via *invalid. 840 */ 841 static int 842 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 843 int *expanded, int *invalid) 844 { 845 int i; 846 int in_bracket, brace_start, brace_end, brace_level; 847 int sel_start, sel_end; 848 849 *invalid = *expanded = 0; 850 851 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 852 *invalid = 1; 853 return 0; 854 } else if (brace_start == -1) 855 return 0; 856 857 in_bracket = brace_level = 0; 858 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 859 switch (pattern[i]) { 860 case '{': 861 if (in_bracket) 862 break; 863 brace_level++; 864 break; 865 case '}': 866 if (in_bracket) 867 break; 868 brace_level--; 869 break; 870 case '[': 871 in_bracket = 1; 872 break; 873 case ']': 874 in_bracket = 0; 875 break; 876 case '\\': 877 if (i < brace_end - 1) 878 i++; /* skip */ 879 break; 880 } 881 if (pattern[i] == ',' || i == brace_end - 1) { 882 if (in_bracket || brace_level > 0) 883 continue; 884 /* End of a selection, emit an expanded pattern */ 885 886 /* Adjust end index for last selection */ 887 sel_end = (i == brace_end - 1) ? brace_end : i; 888 if (emit_expansion(pattern, brace_start, brace_end, 889 sel_start, sel_end, patternsp, npatternsp) != 0) 890 return -1; 891 /* move on to the next selection */ 892 sel_start = i + 1; 893 continue; 894 } 895 } 896 if (in_bracket || brace_level > 0) { 897 *invalid = 1; 898 return 0; 899 } 900 /* success */ 901 *expanded = 1; 902 return 0; 903 } 904 905 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 906 static int 907 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 908 { 909 char *cp, *cp2, **active = NULL, **done = NULL; 910 size_t i, nactive = 0, ndone = 0; 911 int ret = -1, invalid = 0, expanded = 0; 912 913 *patternsp = NULL; 914 *npatternsp = 0; 915 916 /* Start the worklist with the original pattern */ 917 if ((cp = strdup(pattern)) == NULL) 918 return -1; 919 if (append(cp, &active, &nactive) != 0) { 920 free(cp); 921 return -1; 922 } 923 while (nactive > 0) { 924 cp = active[nactive - 1]; 925 nactive--; 926 if (brace_expand_one(cp, &active, &nactive, 927 &expanded, &invalid) == -1) { 928 free(cp); 929 goto fail; 930 } 931 if (invalid) 932 fatal_f("invalid brace pattern \"%s\"", cp); 933 if (expanded) { 934 /* 935 * Current entry expanded to new entries on the 936 * active list; discard the progenitor pattern. 937 */ 938 free(cp); 939 continue; 940 } 941 /* 942 * Pattern did not expand; append the filename component to 943 * the completed list 944 */ 945 if ((cp2 = strrchr(cp, '/')) != NULL) 946 *cp2++ = '\0'; 947 else 948 cp2 = cp; 949 if (append(xstrdup(cp2), &done, &ndone) != 0) { 950 free(cp); 951 goto fail; 952 } 953 free(cp); 954 } 955 /* success */ 956 *patternsp = done; 957 *npatternsp = ndone; 958 done = NULL; 959 ndone = 0; 960 ret = 0; 961 fail: 962 for (i = 0; i < nactive; i++) 963 free(active[i]); 964 free(active); 965 for (i = 0; i < ndone; i++) 966 free(done[i]); 967 free(done); 968 return ret; 969 } 970 971 static struct sftp_conn * 972 do_sftp_connect(char *host, char *user, int port, char *sftp_direct, 973 int *reminp, int *remoutp, int *pidp) 974 { 975 if (sftp_direct == NULL) { 976 if (do_cmd(ssh_program, host, user, port, 1, "sftp", 977 reminp, remoutp, pidp) < 0) 978 return NULL; 979 980 } else { 981 freeargs(&args); 982 addargs(&args, "sftp-server"); 983 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", 984 reminp, remoutp, pidp) < 0) 985 return NULL; 986 } 987 return sftp_init(*reminp, *remoutp, 988 sftp_copy_buflen, sftp_nrequests, limit_kbps); 989 } 990 991 static void 992 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 993 { 994 char *suser = NULL, *host = NULL, *src = NULL; 995 char *bp, *tuser, *thost, *targ; 996 int sport = -1, tport = -1; 997 struct sftp_conn *conn = NULL, *conn2 = NULL; 998 arglist alist; 999 int i, r, status; 1000 struct stat sb; 1001 u_int j; 1002 1003 memset(&alist, '\0', sizeof(alist)); 1004 alist.list = NULL; 1005 1006 /* Parse target */ 1007 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 1008 if (r == -1) { 1009 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 1010 ++errs; 1011 goto out; 1012 } 1013 if (r != 0) { 1014 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 1015 &targ) == -1) { 1016 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 1017 ++errs; 1018 goto out; 1019 } 1020 } 1021 1022 /* Parse source files */ 1023 for (i = 0; i < argc - 1; i++) { 1024 free(suser); 1025 free(host); 1026 free(src); 1027 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1028 if (r == -1) { 1029 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1030 ++errs; 1031 continue; 1032 } 1033 if (r != 0) { 1034 parse_user_host_path(argv[i], &suser, &host, &src); 1035 } 1036 if (suser != NULL && !okname(suser)) { 1037 ++errs; 1038 continue; 1039 } 1040 if (host && throughlocal) { /* extended remote to remote */ 1041 if (mode == MODE_SFTP) { 1042 if (remin == -1 || conn == NULL) { 1043 /* Connect to dest now */ 1044 sftp_free(conn); 1045 conn = do_sftp_connect(thost, tuser, 1046 tport, sftp_direct, 1047 &remin, &remout, &do_cmd_pid); 1048 if (conn == NULL) { 1049 fatal("Unable to open " 1050 "destination connection"); 1051 } 1052 debug3_f("origin in %d out %d pid %ld", 1053 remin, remout, (long)do_cmd_pid); 1054 } 1055 /* 1056 * XXX remember suser/host/sport and only 1057 * reconnect if they change between arguments. 1058 * would save reconnections for cases like 1059 * scp -3 hosta:/foo hosta:/bar hostb: 1060 */ 1061 /* Connect to origin now */ 1062 sftp_free(conn2); 1063 conn2 = do_sftp_connect(host, suser, 1064 sport, sftp_direct, 1065 &remin2, &remout2, &do_cmd_pid2); 1066 if (conn2 == NULL) { 1067 fatal("Unable to open " 1068 "source connection"); 1069 } 1070 debug3_f("destination in %d out %d pid %ld", 1071 remin2, remout2, (long)do_cmd_pid2); 1072 throughlocal_sftp(conn2, conn, src, targ); 1073 (void) close(remin2); 1074 (void) close(remout2); 1075 remin2 = remout2 = -1; 1076 if (waitpid(do_cmd_pid2, &status, 0) == -1) 1077 ++errs; 1078 else if (!WIFEXITED(status) || 1079 WEXITSTATUS(status) != 0) 1080 ++errs; 1081 do_cmd_pid2 = -1; 1082 continue; 1083 } else { 1084 xasprintf(&bp, "%s -f %s%s", cmd, 1085 *src == '-' ? "-- " : "", src); 1086 if (do_cmd(ssh_program, host, suser, sport, 0, 1087 bp, &remin, &remout, &do_cmd_pid) < 0) 1088 exit(1); 1089 free(bp); 1090 xasprintf(&bp, "%s -t %s%s", cmd, 1091 *targ == '-' ? "-- " : "", targ); 1092 if (do_cmd2(thost, tuser, tport, bp, 1093 remin, remout) < 0) 1094 exit(1); 1095 free(bp); 1096 (void) close(remin); 1097 (void) close(remout); 1098 remin = remout = -1; 1099 } 1100 } else if (host) { /* standard remote to remote */ 1101 /* 1102 * Second remote user is passed to first remote side 1103 * via scp command-line. Ensure it contains no obvious 1104 * shell characters. 1105 */ 1106 if (tuser != NULL && !okname(tuser)) { 1107 ++errs; 1108 continue; 1109 } 1110 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 1111 /* This would require the remote support URIs */ 1112 fatal("target port not supported with two " 1113 "remote hosts and the -R option"); 1114 } 1115 1116 freeargs(&alist); 1117 addargs(&alist, "%s", ssh_program); 1118 addargs(&alist, "-x"); 1119 addargs(&alist, "-oClearAllForwardings=yes"); 1120 addargs(&alist, "-n"); 1121 for (j = 0; j < remote_remote_args.num; j++) { 1122 addargs(&alist, "%s", 1123 remote_remote_args.list[j]); 1124 } 1125 1126 if (sport != -1) { 1127 addargs(&alist, "-p"); 1128 addargs(&alist, "%d", sport); 1129 } 1130 if (suser) { 1131 addargs(&alist, "-l"); 1132 addargs(&alist, "%s", suser); 1133 } 1134 addargs(&alist, "--"); 1135 addargs(&alist, "%s", host); 1136 addargs(&alist, "%s", cmd); 1137 addargs(&alist, "%s", src); 1138 addargs(&alist, "%s%s%s:%s", 1139 tuser ? tuser : "", tuser ? "@" : "", 1140 thost, targ); 1141 if (do_local_cmd(&alist) != 0) 1142 errs = 1; 1143 } else { /* local to remote */ 1144 if (mode == MODE_SFTP) { 1145 /* no need to glob: already done by shell */ 1146 if (stat(argv[i], &sb) != 0) { 1147 fatal("stat local \"%s\": %s", argv[i], 1148 strerror(errno)); 1149 } 1150 if (remin == -1) { 1151 /* Connect to remote now */ 1152 sftp_free(conn); 1153 conn = do_sftp_connect(thost, tuser, 1154 tport, sftp_direct, 1155 &remin, &remout, &do_cmd_pid); 1156 if (conn == NULL) { 1157 fatal("Unable to open sftp " 1158 "connection"); 1159 } 1160 } 1161 1162 /* The protocol */ 1163 source_sftp(1, argv[i], targ, conn); 1164 continue; 1165 } 1166 /* SCP */ 1167 if (remin == -1) { 1168 xasprintf(&bp, "%s -t %s%s", cmd, 1169 *targ == '-' ? "-- " : "", targ); 1170 if (do_cmd(ssh_program, thost, tuser, tport, 0, 1171 bp, &remin, &remout, &do_cmd_pid) < 0) 1172 exit(1); 1173 if (response() < 0) 1174 exit(1); 1175 free(bp); 1176 } 1177 source(1, argv + i); 1178 } 1179 } 1180 out: 1181 freeargs(&alist); 1182 free(tuser); 1183 free(thost); 1184 free(targ); 1185 free(suser); 1186 free(host); 1187 free(src); 1188 sftp_free(conn); 1189 sftp_free(conn2); 1190 } 1191 1192 static void 1193 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 1194 { 1195 char *bp, *host = NULL, *suser = NULL, *src = NULL; 1196 arglist alist; 1197 struct sftp_conn *conn = NULL; 1198 int i, r, sport = -1; 1199 1200 memset(&alist, '\0', sizeof(alist)); 1201 alist.list = NULL; 1202 1203 for (i = 0; i < argc - 1; i++) { 1204 free(suser); 1205 free(host); 1206 free(src); 1207 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1208 if (r == -1) { 1209 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1210 ++errs; 1211 continue; 1212 } 1213 if (r != 0) 1214 parse_user_host_path(argv[i], &suser, &host, &src); 1215 if (suser != NULL && !okname(suser)) { 1216 ++errs; 1217 continue; 1218 } 1219 if (!host) { /* Local to local. */ 1220 freeargs(&alist); 1221 addargs(&alist, "%s", _PATH_CP); 1222 if (iamrecursive) 1223 addargs(&alist, "-r"); 1224 if (pflag) 1225 addargs(&alist, "-p"); 1226 addargs(&alist, "--"); 1227 addargs(&alist, "%s", argv[i]); 1228 addargs(&alist, "%s", argv[argc-1]); 1229 if (do_local_cmd(&alist)) 1230 ++errs; 1231 continue; 1232 } 1233 /* Remote to local. */ 1234 if (mode == MODE_SFTP) { 1235 sftp_free(conn); 1236 conn = do_sftp_connect(host, suser, sport, 1237 sftp_direct, &remin, &remout, &do_cmd_pid); 1238 if (conn == NULL) { 1239 error("sftp connection failed"); 1240 ++errs; 1241 continue; 1242 } 1243 1244 /* The protocol */ 1245 sink_sftp(1, argv[argc - 1], src, conn); 1246 1247 (void) close(remin); 1248 (void) close(remout); 1249 remin = remout = -1; 1250 continue; 1251 } 1252 /* SCP */ 1253 xasprintf(&bp, "%s -f %s%s", 1254 cmd, *src == '-' ? "-- " : "", src); 1255 if (do_cmd(ssh_program, host, suser, sport, 0, bp, 1256 &remin, &remout, &do_cmd_pid) < 0) { 1257 free(bp); 1258 ++errs; 1259 continue; 1260 } 1261 free(bp); 1262 sink(1, argv + argc - 1, src); 1263 (void) close(remin); 1264 remin = remout = -1; 1265 } 1266 freeargs(&alist); 1267 free(suser); 1268 free(host); 1269 free(src); 1270 sftp_free(conn); 1271 } 1272 1273 /* Prepare remote path, handling ~ by assuming cwd is the homedir */ 1274 static char * 1275 prepare_remote_path(struct sftp_conn *conn, const char *path) 1276 { 1277 size_t nslash; 1278 1279 /* Handle ~ prefixed paths */ 1280 if (*path == '\0' || strcmp(path, "~") == 0) 1281 return xstrdup("."); 1282 if (*path != '~') 1283 return xstrdup(path); 1284 if (strncmp(path, "~/", 2) == 0) { 1285 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2)) 1286 return xstrdup("."); 1287 return xstrdup(path + 2 + nslash); 1288 } 1289 if (sftp_can_expand_path(conn)) 1290 return sftp_expand_path(conn, path); 1291 /* No protocol extension */ 1292 error("server expand-path extension is required " 1293 "for ~user paths in SFTP mode"); 1294 return NULL; 1295 } 1296 1297 void 1298 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) 1299 { 1300 char *target = NULL, *abs_dst = NULL; 1301 const char *filename = NULL; 1302 int src_is_dir, target_is_dir; 1303 Attrib a; 1304 struct stat st; 1305 1306 memset(&a, '\0', sizeof(a)); 1307 if (stat(src, &st) != 0) 1308 fatal("stat local \"%s\": %s", src, strerror(errno)); 1309 src_is_dir = S_ISDIR(st.st_mode); 1310 if ((filename = basename(src)) == NULL) 1311 fatal("basename \"%s\": %s", src, strerror(errno)); 1312 1313 /* Special handling for source of '..' */ 1314 if (strcmp(filename, "..") == 0) 1315 filename = "."; /* Upload to dest, not dest/.. */ 1316 1317 /* 1318 * No need to glob here - the local shell already took care of 1319 * the expansions 1320 */ 1321 if ((target = prepare_remote_path(conn, targ)) == NULL) 1322 cleanup_exit(255); 1323 target_is_dir = sftp_remote_is_dir(conn, target); 1324 if (targetshouldbedirectory && !target_is_dir) { 1325 debug("target directory \"%s\" does not exist", target); 1326 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS; 1327 a.perm = st.st_mode | 0700; /* ensure writable */ 1328 if (sftp_mkdir(conn, target, &a, 1) != 0) 1329 cleanup_exit(255); /* error already logged */ 1330 target_is_dir = 1; 1331 } 1332 if (target_is_dir) 1333 abs_dst = sftp_path_append(target, filename); 1334 else { 1335 abs_dst = target; 1336 target = NULL; 1337 } 1338 debug3_f("copying local %s to remote %s", src, abs_dst); 1339 1340 if (src_is_dir && iamrecursive) { 1341 if (sftp_upload_dir(conn, src, abs_dst, pflag, 1342 SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) { 1343 error("failed to upload directory %s to %s", src, targ); 1344 errs = 1; 1345 } 1346 } else if (sftp_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) { 1347 error("failed to upload file %s to %s", src, targ); 1348 errs = 1; 1349 } 1350 1351 free(abs_dst); 1352 free(target); 1353 } 1354 1355 void 1356 source(int argc, char **argv) 1357 { 1358 struct stat stb; 1359 static BUF buffer; 1360 BUF *bp; 1361 off_t i, statbytes; 1362 size_t amt, nr; 1363 int fd = -1, haderr, indx; 1364 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1365 int len; 1366 1367 for (indx = 0; indx < argc; ++indx) { 1368 fd = -1; 1369 name = argv[indx]; 1370 statbytes = 0; 1371 len = strlen(name); 1372 while (len > 1 && name[len-1] == '/') 1373 name[--len] = '\0'; 1374 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1) 1375 goto syserr; 1376 if (strchr(name, '\n') != NULL) { 1377 strvisx(encname, name, len, VIS_NL); 1378 name = encname; 1379 } 1380 if (fstat(fd, &stb) == -1) { 1381 syserr: run_err("%s: %s", name, strerror(errno)); 1382 goto next; 1383 } 1384 if (stb.st_size < 0) { 1385 run_err("%s: %s", name, "Negative file size"); 1386 goto next; 1387 } 1388 unset_nonblock(fd); 1389 switch (stb.st_mode & S_IFMT) { 1390 case S_IFREG: 1391 break; 1392 case S_IFDIR: 1393 if (iamrecursive) { 1394 rsource(name, &stb); 1395 goto next; 1396 } 1397 /* FALLTHROUGH */ 1398 default: 1399 run_err("%s: not a regular file", name); 1400 goto next; 1401 } 1402 if ((last = strrchr(name, '/')) == NULL) 1403 last = name; 1404 else 1405 ++last; 1406 curfile = last; 1407 if (pflag) { 1408 if (do_times(remout, verbose_mode, &stb) < 0) 1409 goto next; 1410 } 1411 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1412 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1413 (u_int) (stb.st_mode & FILEMODEMASK), 1414 (long long)stb.st_size, last); 1415 if (verbose_mode) 1416 fmprintf(stderr, "Sending file modes: %s", buf); 1417 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1418 if (response() < 0) 1419 goto next; 1420 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1421 next: if (fd != -1) { 1422 (void) close(fd); 1423 fd = -1; 1424 } 1425 continue; 1426 } 1427 if (showprogress) 1428 start_progress_meter(curfile, stb.st_size, &statbytes); 1429 set_nonblock(remout); 1430 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1431 amt = bp->cnt; 1432 if (i + (off_t)amt > stb.st_size) 1433 amt = stb.st_size - i; 1434 if (!haderr) { 1435 if ((nr = atomicio(read, fd, 1436 bp->buf, amt)) != amt) { 1437 haderr = errno; 1438 memset(bp->buf + nr, 0, amt - nr); 1439 } 1440 } 1441 /* Keep writing after error to retain sync */ 1442 if (haderr) { 1443 (void)atomicio(vwrite, remout, bp->buf, amt); 1444 memset(bp->buf, 0, amt); 1445 continue; 1446 } 1447 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1448 &statbytes) != amt) 1449 haderr = errno; 1450 } 1451 unset_nonblock(remout); 1452 1453 if (fd != -1) { 1454 if (close(fd) == -1 && !haderr) 1455 haderr = errno; 1456 fd = -1; 1457 } 1458 if (!haderr) 1459 (void) atomicio(vwrite, remout, empty, 1); 1460 else 1461 run_err("%s: %s", name, strerror(haderr)); 1462 (void) response(); 1463 if (showprogress) 1464 stop_progress_meter(); 1465 } 1466 } 1467 1468 void 1469 rsource(char *name, struct stat *statp) 1470 { 1471 DIR *dirp; 1472 struct dirent *dp; 1473 char *last, *vect[1], path[PATH_MAX + 20]; 1474 1475 if (!(dirp = opendir(name))) { 1476 run_err("%s: %s", name, strerror(errno)); 1477 return; 1478 } 1479 last = strrchr(name, '/'); 1480 if (last == NULL) 1481 last = name; 1482 else 1483 last++; 1484 if (pflag) { 1485 if (do_times(remout, verbose_mode, statp) < 0) { 1486 closedir(dirp); 1487 return; 1488 } 1489 } 1490 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1491 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1492 if (verbose_mode) 1493 fmprintf(stderr, "Entering directory: %s", path); 1494 (void) atomicio(vwrite, remout, path, strlen(path)); 1495 if (response() < 0) { 1496 closedir(dirp); 1497 return; 1498 } 1499 while ((dp = readdir(dirp)) != NULL) { 1500 if (dp->d_ino == 0) 1501 continue; 1502 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1503 continue; 1504 if ((size_t)snprintf(path, sizeof path, "%s/%s", 1505 name, dp->d_name) >= sizeof path) { 1506 run_err("%s/%s: name too long", name, dp->d_name); 1507 continue; 1508 } 1509 vect[0] = path; 1510 source(1, vect); 1511 } 1512 (void) closedir(dirp); 1513 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 1514 (void) response(); 1515 } 1516 1517 void 1518 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) 1519 { 1520 char *abs_src = NULL; 1521 char *abs_dst = NULL; 1522 glob_t g; 1523 const char *filename; 1524 char *tmp = NULL; 1525 int i, r, err = 0, dst_is_dir; 1526 struct stat st; 1527 1528 memset(&g, 0, sizeof(g)); 1529 1530 /* 1531 * Here, we need remote glob as SFTP can not depend on remote shell 1532 * expansions 1533 */ 1534 if ((abs_src = prepare_remote_path(conn, src)) == NULL) { 1535 err = -1; 1536 goto out; 1537 } 1538 1539 debug3_f("copying remote %s to local %s", abs_src, dst); 1540 if ((r = sftp_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK, 1541 NULL, &g)) != 0) { 1542 if (r == GLOB_NOSPACE) 1543 error("%s: too many glob matches", src); 1544 else 1545 error("%s: %s", src, strerror(ENOENT)); 1546 err = -1; 1547 goto out; 1548 } 1549 1550 /* Did we actually get any matches back from the glob? */ 1551 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != NULL) { 1552 /* 1553 * If nothing matched but a path returned, then it's probably 1554 * a GLOB_NOCHECK result. Check whether the unglobbed path 1555 * exists so we can give a nice error message early. 1556 */ 1557 if (sftp_stat(conn, g.gl_pathv[0], 1, NULL) != 0) { 1558 error("%s: %s", src, strerror(ENOENT)); 1559 err = -1; 1560 goto out; 1561 } 1562 } 1563 1564 if ((r = stat(dst, &st)) != 0) 1565 debug2_f("stat local \"%s\": %s", dst, strerror(errno)); 1566 dst_is_dir = r == 0 && S_ISDIR(st.st_mode); 1567 1568 if (g.gl_matchc > 1 && !dst_is_dir) { 1569 if (r == 0) { 1570 error("Multiple files match pattern, but destination " 1571 "\"%s\" is not a directory", dst); 1572 err = -1; 1573 goto out; 1574 } 1575 debug2_f("creating destination \"%s\"", dst); 1576 if (mkdir(dst, 0777) != 0) { 1577 error("local mkdir \"%s\": %s", dst, strerror(errno)); 1578 err = -1; 1579 goto out; 1580 } 1581 dst_is_dir = 1; 1582 } 1583 1584 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1585 tmp = xstrdup(g.gl_pathv[i]); 1586 if ((filename = basename(tmp)) == NULL) { 1587 error("basename %s: %s", tmp, strerror(errno)); 1588 err = -1; 1589 goto out; 1590 } 1591 1592 /* Special handling for destination of '..' */ 1593 if (strcmp(filename, "..") == 0) 1594 filename = "."; /* Download to dest, not dest/.. */ 1595 1596 if (dst_is_dir) 1597 abs_dst = sftp_path_append(dst, filename); 1598 else 1599 abs_dst = xstrdup(dst); 1600 1601 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1602 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1603 if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst, 1604 NULL, pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1) 1605 err = -1; 1606 } else { 1607 if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL, 1608 pflag, 0, 0, 1) == -1) 1609 err = -1; 1610 } 1611 free(abs_dst); 1612 abs_dst = NULL; 1613 free(tmp); 1614 tmp = NULL; 1615 } 1616 1617 out: 1618 free(abs_src); 1619 free(tmp); 1620 globfree(&g); 1621 if (err == -1) 1622 errs = 1; 1623 } 1624 1625 1626 #define TYPE_OVERFLOW(type, val) \ 1627 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1628 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1629 (sizeof(type) != 4 && sizeof(type) != 8)) 1630 1631 void 1632 sink(int argc, char **argv, const char *src) 1633 { 1634 static BUF buffer; 1635 struct stat stb; 1636 BUF *bp; 1637 off_t i; 1638 size_t j, count; 1639 int amt, exists, first, ofd; 1640 mode_t mode, omode, mask; 1641 off_t size, statbytes; 1642 unsigned long long ull; 1643 int setimes, targisdir, wrerr; 1644 char ch, *cp, *np, *targ, *vect[1], buf[2048], visbuf[2048]; 1645 const char *why; 1646 char **patterns = NULL; 1647 size_t n, npatterns = 0; 1648 struct timeval tv[2]; 1649 1650 #define atime tv[0] 1651 #define mtime tv[1] 1652 #define SCREWUP(str) { why = str; goto screwup; } 1653 1654 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1655 SCREWUP("Unexpected off_t/time_t size"); 1656 1657 setimes = targisdir = 0; 1658 mask = umask(0); 1659 if (!pflag) { 1660 mask |= 07000; 1661 (void) umask(mask); 1662 } 1663 if (argc != 1) { 1664 run_err("ambiguous target"); 1665 exit(1); 1666 } 1667 targ = *argv; 1668 if (targetshouldbedirectory) 1669 verifydir(targ); 1670 1671 (void) atomicio(vwrite, remout, empty, 1); 1672 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1673 targisdir = 1; 1674 if (src != NULL && !iamrecursive && !Tflag) { 1675 /* 1676 * Prepare to try to restrict incoming filenames to match 1677 * the requested destination file glob. 1678 */ 1679 if (brace_expand(src, &patterns, &npatterns) != 0) 1680 fatal_f("could not expand pattern"); 1681 } 1682 for (first = 1;; first = 0) { 1683 cp = buf; 1684 if (atomicio(read, remin, cp, 1) != 1) 1685 goto done; 1686 if (*cp++ == '\n') 1687 SCREWUP("unexpected <newline>"); 1688 do { 1689 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1690 SCREWUP("lost connection"); 1691 *cp++ = ch; 1692 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1693 *cp = 0; 1694 if (verbose_mode) 1695 fmprintf(stderr, "Sink: %s", buf); 1696 1697 if (buf[0] == '\01' || buf[0] == '\02') { 1698 if (iamremote == 0) { 1699 (void) snmprintf(visbuf, sizeof(visbuf), 1700 NULL, "%s", buf + 1); 1701 (void) atomicio(vwrite, STDERR_FILENO, 1702 visbuf, strlen(visbuf)); 1703 } 1704 if (buf[0] == '\02') 1705 exit(1); 1706 ++errs; 1707 continue; 1708 } 1709 if (buf[0] == 'E') { 1710 (void) atomicio(vwrite, remout, __UNCONST(""), 1); 1711 goto done; 1712 } 1713 if (ch == '\n') 1714 *--cp = 0; 1715 1716 cp = buf; 1717 if (*cp == 'T') { 1718 setimes++; 1719 cp++; 1720 if (!isdigit((unsigned char)*cp)) 1721 SCREWUP("mtime.sec not present"); 1722 ull = strtoull(cp, &cp, 10); 1723 if (!cp || *cp++ != ' ') 1724 SCREWUP("mtime.sec not delimited"); 1725 if (TYPE_OVERFLOW(time_t, ull)) 1726 setimes = 0; /* out of range */ 1727 mtime.tv_sec = ull; 1728 mtime.tv_usec = strtol(cp, &cp, 10); 1729 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1730 mtime.tv_usec > 999999) 1731 SCREWUP("mtime.usec not delimited"); 1732 if (!isdigit((unsigned char)*cp)) 1733 SCREWUP("atime.sec not present"); 1734 ull = strtoull(cp, &cp, 10); 1735 if (!cp || *cp++ != ' ') 1736 SCREWUP("atime.sec not delimited"); 1737 if (TYPE_OVERFLOW(time_t, ull)) 1738 setimes = 0; /* out of range */ 1739 atime.tv_sec = ull; 1740 atime.tv_usec = strtol(cp, &cp, 10); 1741 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1742 atime.tv_usec > 999999) 1743 SCREWUP("atime.usec not delimited"); 1744 (void) atomicio(vwrite, remout, empty, 1); 1745 continue; 1746 } 1747 if (*cp != 'C' && *cp != 'D') { 1748 /* 1749 * Check for the case "rcp remote:foo\* local:bar". 1750 * In this case, the line "No match." can be returned 1751 * by the shell before the rcp command on the remote is 1752 * executed so the ^Aerror_message convention isn't 1753 * followed. 1754 */ 1755 if (first) { 1756 run_err("%s", cp); 1757 exit(1); 1758 } 1759 SCREWUP("expected control record"); 1760 } 1761 mode = 0; 1762 for (++cp; cp < buf + 5; cp++) { 1763 if (*cp < '0' || *cp > '7') 1764 SCREWUP("bad mode"); 1765 mode = (mode << 3) | (*cp - '0'); 1766 } 1767 if (!pflag) 1768 mode &= ~mask; 1769 if (*cp++ != ' ') 1770 SCREWUP("mode not delimited"); 1771 1772 if (!isdigit((unsigned char)*cp)) 1773 SCREWUP("size not present"); 1774 ull = strtoull(cp, &cp, 10); 1775 if (!cp || *cp++ != ' ') 1776 SCREWUP("size not delimited"); 1777 if (TYPE_OVERFLOW(off_t, ull)) 1778 SCREWUP("size out of range"); 1779 size = (off_t)ull; 1780 1781 if (*cp == '\0' || strchr(cp, '/') != NULL || 1782 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1783 run_err("error: unexpected filename: %s", cp); 1784 exit(1); 1785 } 1786 if (npatterns > 0) { 1787 for (n = 0; n < npatterns; n++) { 1788 if (strcmp(patterns[n], cp) == 0 || 1789 fnmatch(patterns[n], cp, 0) == 0) 1790 break; 1791 } 1792 if (n >= npatterns) { 1793 debug2_f("incoming filename \"%s\" does not " 1794 "match any of %zu expected patterns", cp, 1795 npatterns); 1796 for (n = 0; n < npatterns; n++) { 1797 debug3_f("expected pattern %zu: \"%s\"", 1798 n, patterns[n]); 1799 } 1800 SCREWUP("filename does not match request"); 1801 } 1802 } 1803 if (targisdir) { 1804 static char *namebuf; 1805 static size_t cursize; 1806 size_t need; 1807 1808 need = strlen(targ) + strlen(cp) + 250; 1809 if (need > cursize) { 1810 free(namebuf); 1811 namebuf = xmalloc(need); 1812 cursize = need; 1813 } 1814 (void) snprintf(namebuf, need, "%s%s%s", targ, 1815 strcmp(targ, "/") ? "/" : "", cp); 1816 np = namebuf; 1817 } else 1818 np = targ; 1819 curfile = cp; 1820 exists = stat(np, &stb) == 0; 1821 if (buf[0] == 'D') { 1822 int mod_flag = pflag; 1823 if (!iamrecursive) 1824 SCREWUP("received directory without -r"); 1825 if (exists) { 1826 if (!S_ISDIR(stb.st_mode)) { 1827 errno = ENOTDIR; 1828 goto bad; 1829 } 1830 if (pflag) 1831 (void) chmod(np, mode); 1832 } else { 1833 /* Handle copying from a read-only directory */ 1834 mod_flag = 1; 1835 if (mkdir(np, mode | S_IRWXU) == -1) 1836 goto bad; 1837 } 1838 vect[0] = xstrdup(np); 1839 sink(1, vect, src); 1840 if (setimes) { 1841 setimes = 0; 1842 (void) utimes(vect[0], tv); 1843 } 1844 if (mod_flag) 1845 (void) chmod(vect[0], mode); 1846 free(vect[0]); 1847 continue; 1848 } 1849 omode = mode; 1850 mode |= S_IWUSR; 1851 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1852 bad: run_err("%s: %s", np, strerror(errno)); 1853 continue; 1854 } 1855 (void) atomicio(vwrite, remout, empty, 1); 1856 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1857 (void) close(ofd); 1858 continue; 1859 } 1860 cp = bp->buf; 1861 wrerr = 0; 1862 1863 /* 1864 * NB. do not use run_err() unless immediately followed by 1865 * exit() below as it may send a spurious reply that might 1866 * desynchronise us from the peer. Use note_err() instead. 1867 */ 1868 statbytes = 0; 1869 if (showprogress) 1870 start_progress_meter(curfile, size, &statbytes); 1871 set_nonblock(remin); 1872 for (count = i = 0; i < size; i += bp->cnt) { 1873 amt = bp->cnt; 1874 if (i + amt > size) 1875 amt = size - i; 1876 count += amt; 1877 do { 1878 j = atomicio6(read, remin, cp, amt, 1879 scpio, &statbytes); 1880 if (j == 0) { 1881 run_err("%s", j != EPIPE ? 1882 strerror(errno) : 1883 "dropped connection"); 1884 exit(1); 1885 } 1886 amt -= j; 1887 cp += j; 1888 } while (amt > 0); 1889 1890 if (count == bp->cnt) { 1891 /* Keep reading so we stay sync'd up. */ 1892 if (!wrerr) { 1893 if (atomicio(vwrite, ofd, bp->buf, 1894 count) != count) { 1895 note_err("%s: %s", np, 1896 strerror(errno)); 1897 wrerr = 1; 1898 } 1899 } 1900 count = 0; 1901 cp = bp->buf; 1902 } 1903 } 1904 unset_nonblock(remin); 1905 if (count != 0 && !wrerr && 1906 atomicio(vwrite, ofd, bp->buf, count) != count) { 1907 note_err("%s: %s", np, strerror(errno)); 1908 wrerr = 1; 1909 } 1910 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1911 ftruncate(ofd, size) != 0) 1912 note_err("%s: truncate: %s", np, strerror(errno)); 1913 if (pflag) { 1914 if (exists || omode != mode) 1915 if (fchmod(ofd, omode)) { 1916 note_err("%s: set mode: %s", 1917 np, strerror(errno)); 1918 } 1919 } else { 1920 if (!exists && omode != mode) 1921 if (fchmod(ofd, omode & ~mask)) { 1922 note_err("%s: set mode: %s", 1923 np, strerror(errno)); 1924 } 1925 } 1926 if (close(ofd) == -1) 1927 note_err("%s: close: %s", np, strerror(errno)); 1928 (void) response(); 1929 if (showprogress) 1930 stop_progress_meter(); 1931 if (setimes && !wrerr) { 1932 setimes = 0; 1933 if (utimes(np, tv) == -1) { 1934 note_err("%s: set times: %s", 1935 np, strerror(errno)); 1936 } 1937 } 1938 /* If no error was noted then signal success for this file */ 1939 if (note_err(NULL) == 0) 1940 (void) atomicio(vwrite, remout, __UNCONST(""), 1); 1941 } 1942 done: 1943 for (n = 0; n < npatterns; n++) 1944 free(patterns[n]); 1945 free(patterns); 1946 return; 1947 screwup: 1948 for (n = 0; n < npatterns; n++) 1949 free(patterns[n]); 1950 free(patterns); 1951 run_err("protocol error: %s", why); 1952 exit(1); 1953 } 1954 1955 void 1956 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, 1957 char *src, char *targ) 1958 { 1959 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1960 char *abs_src = NULL, *tmp = NULL; 1961 glob_t g; 1962 int i, r, targetisdir, err = 0; 1963 1964 if ((filename = basename(src)) == NULL) 1965 fatal("basename %s: %s", src, strerror(errno)); 1966 1967 if ((abs_src = prepare_remote_path(from, src)) == NULL || 1968 (target = prepare_remote_path(to, targ)) == NULL) 1969 cleanup_exit(255); 1970 memset(&g, 0, sizeof(g)); 1971 1972 targetisdir = sftp_remote_is_dir(to, target); 1973 if (!targetisdir && targetshouldbedirectory) { 1974 error("%s: destination is not a directory", targ); 1975 err = -1; 1976 goto out; 1977 } 1978 1979 debug3_f("copying remote %s to remote %s", abs_src, target); 1980 if ((r = sftp_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK, 1981 NULL, &g)) != 0) { 1982 if (r == GLOB_NOSPACE) 1983 error("%s: too many glob matches", src); 1984 else 1985 error("%s: %s", src, strerror(ENOENT)); 1986 err = -1; 1987 goto out; 1988 } 1989 1990 /* Did we actually get any matches back from the glob? */ 1991 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != NULL) { 1992 /* 1993 * If nothing matched but a path returned, then it's probably 1994 * a GLOB_NOCHECK result. Check whether the unglobbed path 1995 * exists so we can give a nice error message early. 1996 */ 1997 if (sftp_stat(from, g.gl_pathv[0], 1, NULL) != 0) { 1998 error("%s: %s", src, strerror(ENOENT)); 1999 err = -1; 2000 goto out; 2001 } 2002 } 2003 2004 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 2005 tmp = xstrdup(g.gl_pathv[i]); 2006 if ((filename = basename(tmp)) == NULL) { 2007 error("basename %s: %s", tmp, strerror(errno)); 2008 err = -1; 2009 goto out; 2010 } 2011 2012 if (targetisdir) 2013 abs_dst = sftp_path_append(target, filename); 2014 else 2015 abs_dst = xstrdup(target); 2016 2017 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 2018 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 2019 if (sftp_crossload_dir(from, to, g.gl_pathv[i], abs_dst, 2020 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) 2021 err = -1; 2022 } else { 2023 if (sftp_crossload(from, to, g.gl_pathv[i], abs_dst, 2024 NULL, pflag) == -1) 2025 err = -1; 2026 } 2027 free(abs_dst); 2028 abs_dst = NULL; 2029 free(tmp); 2030 tmp = NULL; 2031 } 2032 2033 out: 2034 free(abs_src); 2035 free(abs_dst); 2036 free(target); 2037 free(tmp); 2038 globfree(&g); 2039 if (err == -1) 2040 errs = 1; 2041 } 2042 2043 int 2044 response(void) 2045 { 2046 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 2047 2048 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 2049 lostconn(0); 2050 2051 cp = rbuf; 2052 switch (resp) { 2053 case 0: /* ok */ 2054 return (0); 2055 default: 2056 *cp++ = resp; 2057 /* FALLTHROUGH */ 2058 case 1: /* error, followed by error msg */ 2059 case 2: /* fatal error, "" */ 2060 do { 2061 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 2062 lostconn(0); 2063 *cp++ = ch; 2064 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 2065 2066 if (!iamremote) { 2067 cp[-1] = '\0'; 2068 (void) snmprintf(visbuf, sizeof(visbuf), 2069 NULL, "%s\n", rbuf); 2070 (void) atomicio(vwrite, STDERR_FILENO, 2071 visbuf, strlen(visbuf)); 2072 } 2073 ++errs; 2074 if (resp == 1) 2075 return (-1); 2076 exit(1); 2077 } 2078 /* NOTREACHED */ 2079 } 2080 2081 static void 2082 usage(void) 2083 { 2084 (void) fprintf(stderr, 2085 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" 2086 " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n" 2087 " [-P port] [-S program] [-X sftp_option] source ... target\n"); 2088 exit(1); 2089 } 2090 2091 void 2092 run_err(const char *fmt,...) 2093 { 2094 static FILE *fp; 2095 va_list ap; 2096 2097 ++errs; 2098 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 2099 (void) fprintf(fp, "%c", 0x01); 2100 (void) fprintf(fp, "scp: "); 2101 va_start(ap, fmt); 2102 (void) vfprintf(fp, fmt, ap); 2103 va_end(ap); 2104 (void) fprintf(fp, "\n"); 2105 (void) fflush(fp); 2106 } 2107 2108 if (!iamremote) { 2109 va_start(ap, fmt); 2110 vfmprintf(stderr, fmt, ap); 2111 va_end(ap); 2112 fprintf(stderr, "\n"); 2113 } 2114 } 2115 2116 /* 2117 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 2118 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 2119 * any active error at the end of the transfer. 2120 */ 2121 int 2122 note_err(const char *fmt, ...) 2123 { 2124 static char *emsg; 2125 va_list ap; 2126 2127 /* Replay any previously-noted error */ 2128 if (fmt == NULL) { 2129 if (emsg == NULL) 2130 return 0; 2131 run_err("%s", emsg); 2132 free(emsg); 2133 emsg = NULL; 2134 return -1; 2135 } 2136 2137 errs++; 2138 /* Prefer first-noted error */ 2139 if (emsg != NULL) 2140 return -1; 2141 2142 va_start(ap, fmt); 2143 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 2144 va_end(ap); 2145 return -1; 2146 } 2147 2148 void 2149 verifydir(char *cp) 2150 { 2151 struct stat stb; 2152 2153 if (!stat(cp, &stb)) { 2154 if (S_ISDIR(stb.st_mode)) 2155 return; 2156 errno = ENOTDIR; 2157 } 2158 run_err("%s: %s", cp, strerror(errno)); 2159 killchild(0); 2160 } 2161 2162 int 2163 okname(char *cp0) 2164 { 2165 int c; 2166 char *cp; 2167 2168 cp = cp0; 2169 do { 2170 c = (int)*cp; 2171 if (c & 0200) 2172 goto bad; 2173 if (!isalpha(c) && !isdigit((unsigned char)c)) { 2174 switch (c) { 2175 case '\'': 2176 case '"': 2177 case '`': 2178 case ' ': 2179 case '#': 2180 goto bad; 2181 default: 2182 break; 2183 } 2184 } 2185 } while (*++cp); 2186 return (1); 2187 2188 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 2189 return (0); 2190 } 2191 2192 BUF * 2193 allocbuf(BUF *bp, int fd, int blksize) 2194 { 2195 size_t size; 2196 struct stat stb; 2197 2198 if (fstat(fd, &stb) == -1) { 2199 run_err("fstat: %s", strerror(errno)); 2200 return (NULL); 2201 } 2202 size = ROUNDUP(stb.st_blksize, blksize); 2203 if (size == 0) 2204 size = blksize; 2205 if (bp->cnt >= size) 2206 return (bp); 2207 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 2208 bp->cnt = size; 2209 return (bp); 2210 } 2211 2212 static void 2213 lostconn(int signo) 2214 { 2215 if (!iamremote) 2216 (void)write(STDERR_FILENO, "lost connection\n", 16); 2217 if (signo) 2218 _exit(1); 2219 else 2220 exit(1); 2221 } 2222 2223 void 2224 cleanup_exit(int i) 2225 { 2226 if (remin > 0) 2227 close(remin); 2228 if (remout > 0) 2229 close(remout); 2230 if (remin2 > 0) 2231 close(remin2); 2232 if (remout2 > 0) 2233 close(remout2); 2234 if (do_cmd_pid > 0) 2235 (void)waitpid(do_cmd_pid, NULL, 0); 2236 if (do_cmd_pid2 > 0) 2237 (void)waitpid(do_cmd_pid2, NULL, 0); 2238 exit(i); 2239 } 2240
Indexes created Sat May 02 00:23:24 UTC 2026