1 /* $OpenBSD: scp.c,v 1.179 2013/11/20 20:53:10 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 "includes.h"
75
76 #include <sys/types.h>
77 #include <sys/param.h>
78 #ifdef HAVE_SYS_STAT_H
79 # include <sys/stat.h>
80 #endif
81 #ifdef HAVE_POLL_H
82 #include <poll.h>
83 #else
84 # ifdef HAVE_SYS_POLL_H
85 # include <sys/poll.h>
86 # endif
87 #endif
88 #ifdef HAVE_SYS_TIME_H
89 # include <sys/time.h>
90 #endif
91 #include <sys/wait.h>
92 #include <sys/uio.h>
93
94 #include <ctype.h>
95 #include <dirent.h>
96 #include <errno.h>
97 #include <fcntl.h>
98 #include <pwd.h>
99 #include <signal.h>
100 #include <stdarg.h>
101 #include <stdio.h>
102 #include <stdlib.h>
103 #include <string.h>
104 #include <time.h>
105 #include <unistd.h>
106 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
107 #include <vis.h>
108 #endif
109
110 #include "xmalloc.h"
111 #include "atomicio.h"
112 #include "pathnames.h"
113 #include "log.h"
114 #include "misc.h"
115 #include "progressmeter.h"
116
117 extern char *__progname;
118
119 #define COPY_BUFLEN 16384
120
121 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
122 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout);
123
124 /* Struct for addargs */
125 arglist args;
126 arglist remote_remote_args;
127
128 /* Bandwidth limit */
129 long long limit_kbps = 0;
130 struct bwlimit bwlimit;
131
132 /* Name of current file being transferred. */
133 char *curfile;
134
135 /* This is set to non-zero to enable verbose mode. */
136 int verbose_mode = 0;
137
138 /* This is set to zero if the progressmeter is not desired. */
139 int showprogress = 1;
140
141 /*
142 * This is set to non-zero if remote-remote copy should be piped
143 * through this process.
144 */
145 int throughlocal = 0;
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
153 static void
killchild(int signo)154 killchild(int signo)
155 {
156 if (do_cmd_pid > 1) {
157 kill(do_cmd_pid, signo ? signo : SIGTERM);
158 waitpid(do_cmd_pid, NULL, 0);
159 }
160
161 if (signo)
162 _exit(1);
163 exit(1);
164 }
165
166 static void
suspchild(int signo)167 suspchild(int signo)
168 {
169 int status;
170
171 if (do_cmd_pid > 1) {
172 kill(do_cmd_pid, signo);
173 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 &&
174 errno == EINTR)
175 ;
176 kill(getpid(), SIGSTOP);
177 }
178 }
179
180 static int
do_local_cmd(arglist * a)181 do_local_cmd(arglist *a)
182 {
183 u_int i;
184 int status;
185 pid_t pid;
186
187 if (a->num == 0)
188 fatal("do_local_cmd: no arguments");
189
190 if (verbose_mode) {
191 fprintf(stderr, "Executing:");
192 for (i = 0; i < a->num; i++)
193 fprintf(stderr, " %s", a->list[i]);
194 fprintf(stderr, "\n");
195 }
196 if ((pid = fork()) == -1)
197 fatal("do_local_cmd: fork: %s", strerror(errno));
198
199 if (pid == 0) {
200 execvp(a->list[0], a->list);
201 perror(a->list[0]);
202 exit(1);
203 }
204
205 do_cmd_pid = pid;
206 signal(SIGTERM, killchild);
207 signal(SIGINT, killchild);
208 signal(SIGHUP, killchild);
209
210 while (waitpid(pid, &status, 0) == -1)
211 if (errno != EINTR)
212 fatal("do_local_cmd: waitpid: %s", strerror(errno));
213
214 do_cmd_pid = -1;
215
216 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
217 return (-1);
218
219 return (0);
220 }
221
222 /*
223 * This function executes the given command as the specified user on the
224 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
225 * assigns the input and output file descriptors on success.
226 */
227
228 int
do_cmd(char * host,char * remuser,char * cmd,int * fdin,int * fdout)229 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
230 {
231 int pin[2], pout[2], reserved[2];
232
233 if (verbose_mode)
234 fprintf(stderr,
235 "Executing: program %s host %s, user %s, command %s\n",
236 ssh_program, host,
237 remuser ? remuser : "(unspecified)", cmd);
238
239 /*
240 * Reserve two descriptors so that the real pipes won't get
241 * descriptors 0 and 1 because that will screw up dup2 below.
242 */
243 if (pipe(reserved) < 0)
244 fatal("pipe: %s", strerror(errno));
245
246 /* Create a socket pair for communicating with ssh. */
247 if (pipe(pin) < 0)
248 fatal("pipe: %s", strerror(errno));
249 if (pipe(pout) < 0)
250 fatal("pipe: %s", strerror(errno));
251
252 /* Free the reserved descriptors. */
253 close(reserved[0]);
254 close(reserved[1]);
255
256 signal(SIGTSTP, suspchild);
257 signal(SIGTTIN, suspchild);
258 signal(SIGTTOU, suspchild);
259
260 /* Fork a child to execute the command on the remote host using ssh. */
261 do_cmd_pid = fork();
262 if (do_cmd_pid == 0) {
263 /* Child. */
264 close(pin[1]);
265 close(pout[0]);
266 dup2(pin[0], 0);
267 dup2(pout[1], 1);
268 close(pin[0]);
269 close(pout[1]);
270
271 replacearg(&args, 0, "%s", ssh_program);
272 if (remuser != NULL) {
273 addargs(&args, "-l");
274 addargs(&args, "%s", remuser);
275 }
276 addargs(&args, "--");
277 addargs(&args, "%s", host);
278 addargs(&args, "%s", cmd);
279
280 execvp(ssh_program, args.list);
281 perror(ssh_program);
282 exit(1);
283 } else if (do_cmd_pid == -1) {
284 fatal("fork: %s", strerror(errno));
285 }
286 /* Parent. Close the other side, and return the local side. */
287 close(pin[0]);
288 *fdout = pin[1];
289 close(pout[1]);
290 *fdin = pout[0];
291 signal(SIGTERM, killchild);
292 signal(SIGINT, killchild);
293 signal(SIGHUP, killchild);
294 return 0;
295 }
296
297 /*
298 * This functions executes a command simlar to do_cmd(), but expects the
299 * input and output descriptors to be setup by a previous call to do_cmd().
300 * This way the input and output of two commands can be connected.
301 */
302 int
do_cmd2(char * host,char * remuser,char * cmd,int fdin,int fdout)303 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout)
304 {
305 pid_t pid;
306 int status;
307
308 if (verbose_mode)
309 fprintf(stderr,
310 "Executing: 2nd program %s host %s, user %s, command %s\n",
311 ssh_program, host,
312 remuser ? remuser : "(unspecified)", cmd);
313
314 /* Fork a child to execute the command on the remote host using ssh. */
315 pid = fork();
316 if (pid == 0) {
317 dup2(fdin, 0);
318 dup2(fdout, 1);
319
320 replacearg(&args, 0, "%s", ssh_program);
321 if (remuser != NULL) {
322 addargs(&args, "-l");
323 addargs(&args, "%s", remuser);
324 }
325 addargs(&args, "--");
326 addargs(&args, "%s", host);
327 addargs(&args, "%s", cmd);
328
329 execvp(ssh_program, args.list);
330 perror(ssh_program);
331 exit(1);
332 } else if (pid == -1) {
333 fatal("fork: %s", strerror(errno));
334 }
335 while (waitpid(pid, &status, 0) == -1)
336 if (errno != EINTR)
337 fatal("do_cmd2: waitpid: %s", strerror(errno));
338 return 0;
339 }
340
341 typedef struct {
342 size_t cnt;
343 char *buf;
344 } BUF;
345
346 BUF *allocbuf(BUF *, int, int);
347 void lostconn(int);
348 int okname(char *);
349 void run_err(const char *,...);
350 void verifydir(char *);
351
352 struct passwd *pwd;
353 uid_t userid;
354 int errs, remin, remout;
355 int pflag, iamremote, iamrecursive, targetshouldbedirectory;
356
357 #define CMDNEEDS 64
358 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
359
360 int response(void);
361 void rsource(char *, struct stat *);
362 void sink(int, char *[]);
363 void source(int, char *[]);
364 void tolocal(int, char *[]);
365 void toremote(char *, int, char *[]);
366 void usage(void);
367
368 int
main(int argc,char ** argv)369 main(int argc, char **argv)
370 {
371 int ch, fflag, tflag, status, n;
372 char *targ, **newargv;
373 const char *errstr;
374 extern char *optarg;
375 extern int optind;
376
377 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
378 sanitise_stdfd();
379
380 /* Copy argv, because we modify it */
381 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
382 for (n = 0; n < argc; n++)
383 newargv[n] = xstrdup(argv[n]);
384 argv = newargv;
385
386 __progname = ssh_get_progname(argv[0]);
387
388 memset(&args, '\0', sizeof(args));
389 memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
390 args.list = remote_remote_args.list = NULL;
391 addargs(&args, "%s", ssh_program);
392 addargs(&args, "-x");
393 addargs(&args, "-oForwardAgent=no");
394 addargs(&args, "-oPermitLocalCommand=no");
395 addargs(&args, "-oClearAllForwardings=yes");
396
397 fflag = tflag = 0;
398 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1)
399 switch (ch) {
400 /* User-visible flags. */
401 case '1':
402 case '2':
403 case '4':
404 case '6':
405 case 'C':
406 addargs(&args, "-%c", ch);
407 addargs(&remote_remote_args, "-%c", ch);
408 break;
409 case '3':
410 throughlocal = 1;
411 break;
412 case 'o':
413 case 'c':
414 case 'i':
415 case 'F':
416 addargs(&remote_remote_args, "-%c", ch);
417 addargs(&remote_remote_args, "%s", optarg);
418 addargs(&args, "-%c", ch);
419 addargs(&args, "%s", optarg);
420 break;
421 case 'P':
422 addargs(&remote_remote_args, "-p");
423 addargs(&remote_remote_args, "%s", optarg);
424 addargs(&args, "-p");
425 addargs(&args, "%s", optarg);
426 break;
427 case 'B':
428 addargs(&remote_remote_args, "-oBatchmode=yes");
429 addargs(&args, "-oBatchmode=yes");
430 break;
431 case 'l':
432 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
433 &errstr);
434 if (errstr != NULL)
435 usage();
436 limit_kbps *= 1024; /* kbps */
437 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
438 break;
439 case 'p':
440 pflag = 1;
441 break;
442 case 'r':
443 iamrecursive = 1;
444 break;
445 case 'S':
446 ssh_program = xstrdup(optarg);
447 break;
448 case 'v':
449 addargs(&args, "-v");
450 addargs(&remote_remote_args, "-v");
451 verbose_mode = 1;
452 break;
453 case 'q':
454 addargs(&args, "-q");
455 addargs(&remote_remote_args, "-q");
456 showprogress = 0;
457 break;
458
459 /* Server options. */
460 case 'd':
461 targetshouldbedirectory = 1;
462 break;
463 case 'f': /* "from" */
464 iamremote = 1;
465 fflag = 1;
466 break;
467 case 't': /* "to" */
468 iamremote = 1;
469 tflag = 1;
470 #ifdef HAVE_CYGWIN
471 setmode(0, O_BINARY);
472 #endif
473 break;
474 default:
475 usage();
476 }
477 argc -= optind;
478 argv += optind;
479
480 if ((pwd = getpwuid(userid = getuid())) == NULL)
481 fatal("unknown user %u", (u_int) userid);
482
483 if (!isatty(STDOUT_FILENO))
484 showprogress = 0;
485
486 remin = STDIN_FILENO;
487 remout = STDOUT_FILENO;
488
489 if (fflag) {
490 /* Follow "protocol", send data. */
491 (void) response();
492 source(argc, argv);
493 exit(errs != 0);
494 }
495 if (tflag) {
496 /* Receive data. */
497 sink(argc, argv);
498 exit(errs != 0);
499 }
500 if (argc < 2)
501 usage();
502 if (argc > 2)
503 targetshouldbedirectory = 1;
504
505 remin = remout = -1;
506 do_cmd_pid = -1;
507 /* Command to be executed on remote system using "ssh". */
508 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
509 verbose_mode ? " -v" : "",
510 iamrecursive ? " -r" : "", pflag ? " -p" : "",
511 targetshouldbedirectory ? " -d" : "");
512
513 (void) signal(SIGPIPE, lostconn);
514
515 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
516 toremote(targ, argc, argv);
517 else {
518 if (targetshouldbedirectory)
519 verifydir(argv[argc - 1]);
520 tolocal(argc, argv); /* Dest is local host. */
521 }
522 /*
523 * Finally check the exit status of the ssh process, if one was forked
524 * and no error has occurred yet
525 */
526 if (do_cmd_pid != -1 && errs == 0) {
527 if (remin != -1)
528 (void) close(remin);
529 if (remout != -1)
530 (void) close(remout);
531 if (waitpid(do_cmd_pid, &status, 0) == -1)
532 errs = 1;
533 else {
534 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
535 errs = 1;
536 }
537 }
538 exit(errs != 0);
539 }
540
541 /* Callback from atomicio6 to update progress meter and limit bandwidth */
542 static int
scpio(void * _cnt,size_t s)543 scpio(void *_cnt, size_t s)
544 {
545 off_t *cnt = (off_t *)_cnt;
546
547 *cnt += s;
548 if (limit_kbps > 0)
549 bandwidth_limit(&bwlimit, s);
550 return 0;
551 }
552
553 static int
do_times(int fd,int verb,const struct stat * sb)554 do_times(int fd, int verb, const struct stat *sb)
555 {
556 /* strlen(2^64) == 20; strlen(10^6) == 7 */
557 char buf[(20 + 7 + 2) * 2 + 2];
558
559 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
560 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
561 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
562 if (verb) {
563 fprintf(stderr, "File mtime %lld atime %lld\n",
564 (long long)sb->st_mtime, (long long)sb->st_atime);
565 fprintf(stderr, "Sending file timestamps: %s", buf);
566 }
567 (void) atomicio(vwrite, fd, buf, strlen(buf));
568 return (response());
569 }
570
571 void
toremote(char * targ,int argc,char ** argv)572 toremote(char *targ, int argc, char **argv)
573 {
574 char *bp, *host, *src, *suser, *thost, *tuser, *arg;
575 arglist alist;
576 int i;
577 u_int j;
578
579 memset(&alist, '\0', sizeof(alist));
580 alist.list = NULL;
581
582 *targ++ = 0;
583 if (*targ == 0)
584 targ = ".";
585
586 arg = xstrdup(argv[argc - 1]);
587 if ((thost = strrchr(arg, '@'))) {
588 /* user@host */
589 *thost++ = 0;
590 tuser = arg;
591 if (*tuser == '\0')
592 tuser = NULL;
593 } else {
594 thost = arg;
595 tuser = NULL;
596 }
597
598 if (tuser != NULL && !okname(tuser)) {
599 free(arg);
600 return;
601 }
602
603 for (i = 0; i < argc - 1; i++) {
604 src = colon(argv[i]);
605 if (src && throughlocal) { /* extended remote to remote */
606 *src++ = 0;
607 if (*src == 0)
608 src = ".";
609 host = strrchr(argv[i], '@');
610 if (host) {
611 *host++ = 0;
612 host = cleanhostname(host);
613 suser = argv[i];
614 if (*suser == '\0')
615 suser = pwd->pw_name;
616 else if (!okname(suser))
617 continue;
618 } else {
619 host = cleanhostname(argv[i]);
620 suser = NULL;
621 }
622 xasprintf(&bp, "%s -f %s%s", cmd,
623 *src == '-' ? "-- " : "", src);
624 if (do_cmd(host, suser, bp, &remin, &remout) < 0)
625 exit(1);
626 free(bp);
627 host = cleanhostname(thost);
628 xasprintf(&bp, "%s -t %s%s", cmd,
629 *targ == '-' ? "-- " : "", targ);
630 if (do_cmd2(host, tuser, bp, remin, remout) < 0)
631 exit(1);
632 free(bp);
633 (void) close(remin);
634 (void) close(remout);
635 remin = remout = -1;
636 } else if (src) { /* standard remote to remote */
637 freeargs(&alist);
638 addargs(&alist, "%s", ssh_program);
639 addargs(&alist, "-x");
640 addargs(&alist, "-oClearAllForwardings=yes");
641 addargs(&alist, "-n");
642 for (j = 0; j < remote_remote_args.num; j++) {
643 addargs(&alist, "%s",
644 remote_remote_args.list[j]);
645 }
646 *src++ = 0;
647 if (*src == 0)
648 src = ".";
649 host = strrchr(argv[i], '@');
650
651 if (host) {
652 *host++ = 0;
653 host = cleanhostname(host);
654 suser = argv[i];
655 if (*suser == '\0')
656 suser = pwd->pw_name;
657 else if (!okname(suser))
658 continue;
659 addargs(&alist, "-l");
660 addargs(&alist, "%s", suser);
661 } else {
662 host = cleanhostname(argv[i]);
663 }
664 addargs(&alist, "--");
665 addargs(&alist, "%s", host);
666 addargs(&alist, "%s", cmd);
667 addargs(&alist, "%s", src);
668 addargs(&alist, "%s%s%s:%s",
669 tuser ? tuser : "", tuser ? "@" : "",
670 thost, targ);
671 if (do_local_cmd(&alist) != 0)
672 errs = 1;
673 } else { /* local to remote */
674 if (remin == -1) {
675 xasprintf(&bp, "%s -t %s%s", cmd,
676 *targ == '-' ? "-- " : "", targ);
677 host = cleanhostname(thost);
678 if (do_cmd(host, tuser, bp, &remin,
679 &remout) < 0)
680 exit(1);
681 if (response() < 0)
682 exit(1);
683 free(bp);
684 }
685 source(1, argv + i);
686 }
687 }
688 free(arg);
689 }
690
691 void
tolocal(int argc,char ** argv)692 tolocal(int argc, char **argv)
693 {
694 char *bp, *host, *src, *suser;
695 arglist alist;
696 int i;
697
698 memset(&alist, '\0', sizeof(alist));
699 alist.list = NULL;
700
701 for (i = 0; i < argc - 1; i++) {
702 if (!(src = colon(argv[i]))) { /* Local to local. */
703 freeargs(&alist);
704 addargs(&alist, "%s", _PATH_CP);
705 if (iamrecursive)
706 addargs(&alist, "-r");
707 if (pflag)
708 addargs(&alist, "-p");
709 addargs(&alist, "--");
710 addargs(&alist, "%s", argv[i]);
711 addargs(&alist, "%s", argv[argc-1]);
712 if (do_local_cmd(&alist))
713 ++errs;
714 continue;
715 }
716 *src++ = 0;
717 if (*src == 0)
718 src = ".";
719 if ((host = strrchr(argv[i], '@')) == NULL) {
720 host = argv[i];
721 suser = NULL;
722 } else {
723 *host++ = 0;
724 suser = argv[i];
725 if (*suser == '\0')
726 suser = pwd->pw_name;
727 }
728 host = cleanhostname(host);
729 xasprintf(&bp, "%s -f %s%s",
730 cmd, *src == '-' ? "-- " : "", src);
731 if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
732 free(bp);
733 ++errs;
734 continue;
735 }
736 free(bp);
737 sink(1, argv + argc - 1);
738 (void) close(remin);
739 remin = remout = -1;
740 }
741 }
742
743 void
source(int argc,char ** argv)744 source(int argc, char **argv)
745 {
746 struct stat stb;
747 static BUF buffer;
748 BUF *bp;
749 off_t i, statbytes;
750 size_t amt;
751 int fd = -1, haderr, indx;
752 char *last, *name, buf[2048], encname[MAXPATHLEN];
753 int len;
754
755 for (indx = 0; indx < argc; ++indx) {
756 name = argv[indx];
757 statbytes = 0;
758 len = strlen(name);
759 while (len > 1 && name[len-1] == '/')
760 name[--len] = '\0';
761 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0)
762 goto syserr;
763 if (strchr(name, '\n') != NULL) {
764 strnvis(encname, name, sizeof(encname), VIS_NL);
765 name = encname;
766 }
767 if (fstat(fd, &stb) < 0) {
768 syserr: run_err("%s: %s", name, strerror(errno));
769 goto next;
770 }
771 if (stb.st_size < 0) {
772 run_err("%s: %s", name, "Negative file size");
773 goto next;
774 }
775 unset_nonblock(fd);
776 switch (stb.st_mode & S_IFMT) {
777 case S_IFREG:
778 break;
779 case S_IFDIR:
780 if (iamrecursive) {
781 rsource(name, &stb);
782 goto next;
783 }
784 /* FALLTHROUGH */
785 default:
786 run_err("%s: not a regular file", name);
787 goto next;
788 }
789 if ((last = strrchr(name, '/')) == NULL)
790 last = name;
791 else
792 ++last;
793 curfile = last;
794 if (pflag) {
795 if (do_times(remout, verbose_mode, &stb) < 0)
796 goto next;
797 }
798 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
799 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
800 (u_int) (stb.st_mode & FILEMODEMASK),
801 (long long)stb.st_size, last);
802 if (verbose_mode) {
803 fprintf(stderr, "Sending file modes: %s", buf);
804 }
805 (void) atomicio(vwrite, remout, buf, strlen(buf));
806 if (response() < 0)
807 goto next;
808 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
809 next: if (fd != -1) {
810 (void) close(fd);
811 fd = -1;
812 }
813 continue;
814 }
815 if (showprogress)
816 start_progress_meter(curfile, stb.st_size, &statbytes);
817 set_nonblock(remout);
818 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
819 amt = bp->cnt;
820 if (i + (off_t)amt > stb.st_size)
821 amt = stb.st_size - i;
822 if (!haderr) {
823 if (atomicio(read, fd, bp->buf, amt) != amt)
824 haderr = errno;
825 }
826 /* Keep writing after error to retain sync */
827 if (haderr) {
828 (void)atomicio(vwrite, remout, bp->buf, amt);
829 continue;
830 }
831 if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
832 &statbytes) != amt)
833 haderr = errno;
834 }
835 unset_nonblock(remout);
836 if (showprogress)
837 stop_progress_meter();
838
839 if (fd != -1) {
840 if (close(fd) < 0 && !haderr)
841 haderr = errno;
842 fd = -1;
843 }
844 if (!haderr)
845 (void) atomicio(vwrite, remout, "", 1);
846 else
847 run_err("%s: %s", name, strerror(haderr));
848 (void) response();
849 }
850 }
851
852 void
rsource(char * name,struct stat * statp)853 rsource(char *name, struct stat *statp)
854 {
855 DIR *dirp;
856 struct dirent *dp;
857 char *last, *vect[1], path[MAXPATHLEN];
858
859 if (!(dirp = opendir(name))) {
860 run_err("%s: %s", name, strerror(errno));
861 return;
862 }
863 last = strrchr(name, '/');
864 if (last == 0)
865 last = name;
866 else
867 last++;
868 if (pflag) {
869 if (do_times(remout, verbose_mode, statp) < 0) {
870 closedir(dirp);
871 return;
872 }
873 }
874 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
875 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
876 if (verbose_mode)
877 fprintf(stderr, "Entering directory: %s", path);
878 (void) atomicio(vwrite, remout, path, strlen(path));
879 if (response() < 0) {
880 closedir(dirp);
881 return;
882 }
883 while ((dp = readdir(dirp)) != NULL) {
884 if (dp->d_ino == 0)
885 continue;
886 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
887 continue;
888 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
889 run_err("%s/%s: name too long", name, dp->d_name);
890 continue;
891 }
892 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
893 vect[0] = path;
894 source(1, vect);
895 }
896 (void) closedir(dirp);
897 (void) atomicio(vwrite, remout, "E\n", 2);
898 (void) response();
899 }
900
901 void
sink(int argc,char ** argv)902 sink(int argc, char **argv)
903 {
904 static BUF buffer;
905 struct stat stb;
906 enum {
907 YES, NO, DISPLAYED
908 } wrerr;
909 BUF *bp;
910 off_t i;
911 size_t j, count;
912 int amt, exists, first, ofd;
913 mode_t mode, omode, mask;
914 off_t size, statbytes;
915 unsigned long long ull;
916 int setimes, targisdir, wrerrno = 0;
917 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
918 struct timeval tv[2];
919
920 #define atime tv[0]
921 #define mtime tv[1]
922 #define SCREWUP(str) { why = str; goto screwup; }
923
924 setimes = targisdir = 0;
925 mask = umask(0);
926 if (!pflag)
927 (void) umask(mask);
928 if (argc != 1) {
929 run_err("ambiguous target");
930 exit(1);
931 }
932 targ = *argv;
933 if (targetshouldbedirectory)
934 verifydir(targ);
935
936 (void) atomicio(vwrite, remout, "", 1);
937 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
938 targisdir = 1;
939 for (first = 1;; first = 0) {
940 cp = buf;
941 if (atomicio(read, remin, cp, 1) != 1)
942 return;
943 if (*cp++ == '\n')
944 SCREWUP("unexpected <newline>");
945 do {
946 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
947 SCREWUP("lost connection");
948 *cp++ = ch;
949 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
950 *cp = 0;
951 if (verbose_mode)
952 fprintf(stderr, "Sink: %s", buf);
953
954 if (buf[0] == '\01' || buf[0] == '\02') {
955 if (iamremote == 0)
956 (void) atomicio(vwrite, STDERR_FILENO,
957 buf + 1, strlen(buf + 1));
958 if (buf[0] == '\02')
959 exit(1);
960 ++errs;
961 continue;
962 }
963 if (buf[0] == 'E') {
964 (void) atomicio(vwrite, remout, "", 1);
965 return;
966 }
967 if (ch == '\n')
968 *--cp = 0;
969
970 cp = buf;
971 if (*cp == 'T') {
972 setimes++;
973 cp++;
974 if (!isdigit((unsigned char)*cp))
975 SCREWUP("mtime.sec not present");
976 ull = strtoull(cp, &cp, 10);
977 if (!cp || *cp++ != ' ')
978 SCREWUP("mtime.sec not delimited");
979 if ((time_t)ull < 0 ||
980 (unsigned long long)(time_t)ull != ull)
981 setimes = 0; /* out of range */
982 mtime.tv_sec = ull;
983 mtime.tv_usec = strtol(cp, &cp, 10);
984 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
985 mtime.tv_usec > 999999)
986 SCREWUP("mtime.usec not delimited");
987 if (!isdigit((unsigned char)*cp))
988 SCREWUP("atime.sec not present");
989 ull = strtoull(cp, &cp, 10);
990 if (!cp || *cp++ != ' ')
991 SCREWUP("atime.sec not delimited");
992 if ((time_t)ull < 0 ||
993 (unsigned long long)(time_t)ull != ull)
994 setimes = 0; /* out of range */
995 atime.tv_sec = ull;
996 atime.tv_usec = strtol(cp, &cp, 10);
997 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
998 atime.tv_usec > 999999)
999 SCREWUP("atime.usec not delimited");
1000 (void) atomicio(vwrite, remout, "", 1);
1001 continue;
1002 }
1003 if (*cp != 'C' && *cp != 'D') {
1004 /*
1005 * Check for the case "rcp remote:foo\* local:bar".
1006 * In this case, the line "No match." can be returned
1007 * by the shell before the rcp command on the remote is
1008 * executed so the ^Aerror_message convention isn't
1009 * followed.
1010 */
1011 if (first) {
1012 run_err("%s", cp);
1013 exit(1);
1014 }
1015 SCREWUP("expected control record");
1016 }
1017 mode = 0;
1018 for (++cp; cp < buf + 5; cp++) {
1019 if (*cp < '0' || *cp > '7')
1020 SCREWUP("bad mode");
1021 mode = (mode << 3) | (*cp - '0');
1022 }
1023 if (*cp++ != ' ')
1024 SCREWUP("mode not delimited");
1025
1026 for (size = 0; isdigit((unsigned char)*cp);)
1027 size = size * 10 + (*cp++ - '0');
1028 if (*cp++ != ' ')
1029 SCREWUP("size not delimited");
1030 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
1031 run_err("error: unexpected filename: %s", cp);
1032 exit(1);
1033 }
1034 if (targisdir) {
1035 static char *namebuf;
1036 static size_t cursize;
1037 size_t need;
1038
1039 need = strlen(targ) + strlen(cp) + 250;
1040 if (need > cursize) {
1041 free(namebuf);
1042 namebuf = xmalloc(need);
1043 cursize = need;
1044 }
1045 (void) snprintf(namebuf, need, "%s%s%s", targ,
1046 strcmp(targ, "/") ? "/" : "", cp);
1047 np = namebuf;
1048 } else
1049 np = targ;
1050 curfile = cp;
1051 exists = stat(np, &stb) == 0;
1052 if (buf[0] == 'D') {
1053 int mod_flag = pflag;
1054 if (!iamrecursive)
1055 SCREWUP("received directory without -r");
1056 if (exists) {
1057 if (!S_ISDIR(stb.st_mode)) {
1058 errno = ENOTDIR;
1059 goto bad;
1060 }
1061 if (pflag)
1062 (void) chmod(np, mode);
1063 } else {
1064 /* Handle copying from a read-only
1065 directory */
1066 mod_flag = 1;
1067 if (mkdir(np, mode | S_IRWXU) < 0)
1068 goto bad;
1069 }
1070 vect[0] = xstrdup(np);
1071 sink(1, vect);
1072 if (setimes) {
1073 setimes = 0;
1074 if (utimes(vect[0], tv) < 0)
1075 run_err("%s: set times: %s",
1076 vect[0], strerror(errno));
1077 }
1078 if (mod_flag)
1079 (void) chmod(vect[0], mode);
1080 free(vect[0]);
1081 continue;
1082 }
1083 omode = mode;
1084 mode |= S_IWUSR;
1085 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1086 bad: run_err("%s: %s", np, strerror(errno));
1087 continue;
1088 }
1089 (void) atomicio(vwrite, remout, "", 1);
1090 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
1091 (void) close(ofd);
1092 continue;
1093 }
1094 cp = bp->buf;
1095 wrerr = NO;
1096
1097 statbytes = 0;
1098 if (showprogress)
1099 start_progress_meter(curfile, size, &statbytes);
1100 set_nonblock(remin);
1101 for (count = i = 0; i < size; i += bp->cnt) {
1102 amt = bp->cnt;
1103 if (i + amt > size)
1104 amt = size - i;
1105 count += amt;
1106 do {
1107 j = atomicio6(read, remin, cp, amt,
1108 scpio, &statbytes);
1109 if (j == 0) {
1110 run_err("%s", j != EPIPE ?
1111 strerror(errno) :
1112 "dropped connection");
1113 exit(1);
1114 }
1115 amt -= j;
1116 cp += j;
1117 } while (amt > 0);
1118
1119 if (count == bp->cnt) {
1120 /* Keep reading so we stay sync'd up. */
1121 if (wrerr == NO) {
1122 if (atomicio(vwrite, ofd, bp->buf,
1123 count) != count) {
1124 wrerr = YES;
1125 wrerrno = errno;
1126 }
1127 }
1128 count = 0;
1129 cp = bp->buf;
1130 }
1131 }
1132 unset_nonblock(remin);
1133 if (showprogress)
1134 stop_progress_meter();
1135 if (count != 0 && wrerr == NO &&
1136 atomicio(vwrite, ofd, bp->buf, count) != count) {
1137 wrerr = YES;
1138 wrerrno = errno;
1139 }
1140 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) &&
1141 ftruncate(ofd, size) != 0) {
1142 run_err("%s: truncate: %s", np, strerror(errno));
1143 wrerr = DISPLAYED;
1144 }
1145 if (pflag) {
1146 if (exists || omode != mode)
1147 #ifdef HAVE_FCHMOD
1148 if (fchmod(ofd, omode)) {
1149 #else /* HAVE_FCHMOD */
1150 if (chmod(np, omode)) {
1151 #endif /* HAVE_FCHMOD */
1152 run_err("%s: set mode: %s",
1153 np, strerror(errno));
1154 wrerr = DISPLAYED;
1155 }
1156 } else {
1157 if (!exists && omode != mode)
1158 #ifdef HAVE_FCHMOD
1159 if (fchmod(ofd, omode & ~mask)) {
1160 #else /* HAVE_FCHMOD */
1161 if (chmod(np, omode & ~mask)) {
1162 #endif /* HAVE_FCHMOD */
1163 run_err("%s: set mode: %s",
1164 np, strerror(errno));
1165 wrerr = DISPLAYED;
1166 }
1167 }
1168 if (close(ofd) == -1) {
1169 wrerr = YES;
1170 wrerrno = errno;
1171 }
1172 (void) response();
1173 if (setimes && wrerr == NO) {
1174 setimes = 0;
1175 if (utimes(np, tv) < 0) {
1176 run_err("%s: set times: %s",
1177 np, strerror(errno));
1178 wrerr = DISPLAYED;
1179 }
1180 }
1181 switch (wrerr) {
1182 case YES:
1183 run_err("%s: %s", np, strerror(wrerrno));
1184 break;
1185 case NO:
1186 (void) atomicio(vwrite, remout, "", 1);
1187 break;
1188 case DISPLAYED:
1189 break;
1190 }
1191 }
1192 screwup:
1193 run_err("protocol error: %s", why);
1194 exit(1);
1195 }
1196
1197 int
1198 response(void)
1199 {
1200 char ch, *cp, resp, rbuf[2048];
1201
1202 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1203 lostconn(0);
1204
1205 cp = rbuf;
1206 switch (resp) {
1207 case 0: /* ok */
1208 return (0);
1209 default:
1210 *cp++ = resp;
1211 /* FALLTHROUGH */
1212 case 1: /* error, followed by error msg */
1213 case 2: /* fatal error, "" */
1214 do {
1215 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1216 lostconn(0);
1217 *cp++ = ch;
1218 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1219
1220 if (!iamremote)
1221 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1222 ++errs;
1223 if (resp == 1)
1224 return (-1);
1225 exit(1);
1226 }
1227 /* NOTREACHED */
1228 }
1229
1230 void
1231 usage(void)
1232 {
1233 (void) fprintf(stderr,
1234 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1235 " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1236 " [[user@]host1:]file1 ... [[user@]host2:]file2\n");
1237 exit(1);
1238 }
1239
1240 void
1241 run_err(const char *fmt,...)
1242 {
1243 static FILE *fp;
1244 va_list ap;
1245
1246 ++errs;
1247 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1248 (void) fprintf(fp, "%c", 0x01);
1249 (void) fprintf(fp, "scp: ");
1250 va_start(ap, fmt);
1251 (void) vfprintf(fp, fmt, ap);
1252 va_end(ap);
1253 (void) fprintf(fp, "\n");
1254 (void) fflush(fp);
1255 }
1256
1257 if (!iamremote) {
1258 va_start(ap, fmt);
1259 vfprintf(stderr, fmt, ap);
1260 va_end(ap);
1261 fprintf(stderr, "\n");
1262 }
1263 }
1264
1265 void
1266 verifydir(char *cp)
1267 {
1268 struct stat stb;
1269
1270 if (!stat(cp, &stb)) {
1271 if (S_ISDIR(stb.st_mode))
1272 return;
1273 errno = ENOTDIR;
1274 }
1275 run_err("%s: %s", cp, strerror(errno));
1276 killchild(0);
1277 }
1278
1279 int
1280 okname(char *cp0)
1281 {
1282 int c;
1283 char *cp;
1284
1285 cp = cp0;
1286 do {
1287 c = (int)*cp;
1288 if (c & 0200)
1289 goto bad;
1290 if (!isalpha(c) && !isdigit((unsigned char)c)) {
1291 switch (c) {
1292 case '\'':
1293 case '"':
1294 case '`':
1295 case ' ':
1296 case '#':
1297 goto bad;
1298 default:
1299 break;
1300 }
1301 }
1302 } while (*++cp);
1303 return (1);
1304
1305 bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1306 return (0);
1307 }
1308
1309 BUF *
1310 allocbuf(BUF *bp, int fd, int blksize)
1311 {
1312 size_t size;
1313 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1314 struct stat stb;
1315
1316 if (fstat(fd, &stb) < 0) {
1317 run_err("fstat: %s", strerror(errno));
1318 return (0);
1319 }
1320 size = roundup(stb.st_blksize, blksize);
1321 if (size == 0)
1322 size = blksize;
1323 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1324 size = blksize;
1325 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1326 if (bp->cnt >= size)
1327 return (bp);
1328 if (bp->buf == NULL)
1329 bp->buf = xmalloc(size);
1330 else
1331 bp->buf = xrealloc(bp->buf, 1, size);
1332 memset(bp->buf, 0, size);
1333 bp->cnt = size;
1334 return (bp);
1335 }
1336
1337 void
1338 lostconn(int signo)
1339 {
1340 if (!iamremote)
1341 (void)write(STDERR_FILENO, "lost connection\n", 16);
1342 if (signo)
1343 _exit(1);
1344 else
1345 exit(1);
1346 }
1347