1 /* $OpenBSD: scp.c,v 1.187 2016/09/12 01:22:38 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 #ifdef HAVE_SYS_STAT_H
78 # include <sys/stat.h>
79 #endif
80 #ifdef HAVE_POLL_H
81 #include <poll.h>
82 #else
83 # ifdef HAVE_SYS_POLL_H
84 # include <sys/poll.h>
85 # endif
86 #endif
87 #ifdef HAVE_SYS_TIME_H
88 # include <sys/time.h>
89 #endif
90 #include <sys/wait.h>
91 #include <sys/uio.h>
92
93 #include <ctype.h>
94 #include <dirent.h>
95 #include <errno.h>
96 #include <fcntl.h>
97 #include <limits.h>
98 #include <locale.h>
99 #include <pwd.h>
100 #include <signal.h>
101 #include <stdarg.h>
102 #include <stdio.h>
103 #include <stdlib.h>
104 #include <string.h>
105 #include <time.h>
106 #include <unistd.h>
107 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
108 #include <vis.h>
109 #endif
110
111 #include "xmalloc.h"
112 #include "atomicio.h"
113 #include "pathnames.h"
114 #include "log.h"
115 #include "misc.h"
116 #include "progressmeter.h"
117 #include "utf8.h"
118
119 extern char *__progname;
120
121 #define COPY_BUFLEN 16384
122
123 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
124 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout);
125
126 /* Struct for addargs */
127 arglist args;
128 arglist remote_remote_args;
129
130 /* Bandwidth limit */
131 long long limit_kbps = 0;
132 struct bwlimit bwlimit;
133
134 /* Name of current file being transferred. */
135 char *curfile;
136
137 /* This is set to non-zero to enable verbose mode. */
138 int verbose_mode = 0;
139
140 /* This is set to zero if the progressmeter is not desired. */
141 int showprogress = 1;
142
143 /*
144 * This is set to non-zero if remote-remote copy should be piped
145 * through this process.
146 */
147 int throughlocal = 0;
148
149 /* This is the program to execute for the secured connection. ("ssh" or -S) */
150 char *ssh_program = _PATH_SSH_PROGRAM;
151
152 /* This is used to store the pid of ssh_program */
153 pid_t do_cmd_pid = -1;
154
155 static void
killchild(int signo)156 killchild(int signo)
157 {
158 if (do_cmd_pid > 1) {
159 kill(do_cmd_pid, signo ? signo : SIGTERM);
160 waitpid(do_cmd_pid, NULL, 0);
161 }
162
163 if (signo)
164 _exit(1);
165 exit(1);
166 }
167
168 static void
suspchild(int signo)169 suspchild(int signo)
170 {
171 int status;
172
173 if (do_cmd_pid > 1) {
174 kill(do_cmd_pid, signo);
175 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 &&
176 errno == EINTR)
177 ;
178 kill(getpid(), SIGSTOP);
179 }
180 }
181
182 static int
do_local_cmd(arglist * a)183 do_local_cmd(arglist *a)
184 {
185 u_int i;
186 int status;
187 pid_t pid;
188
189 if (a->num == 0)
190 fatal("do_local_cmd: no arguments");
191
192 if (verbose_mode) {
193 fprintf(stderr, "Executing:");
194 for (i = 0; i < a->num; i++)
195 fmprintf(stderr, " %s", a->list[i]);
196 fprintf(stderr, "\n");
197 }
198 if ((pid = fork()) == -1)
199 fatal("do_local_cmd: fork: %s", strerror(errno));
200
201 if (pid == 0) {
202 execvp(a->list[0], a->list);
203 perror(a->list[0]);
204 exit(1);
205 }
206
207 do_cmd_pid = pid;
208 signal(SIGTERM, killchild);
209 signal(SIGINT, killchild);
210 signal(SIGHUP, killchild);
211
212 while (waitpid(pid, &status, 0) == -1)
213 if (errno != EINTR)
214 fatal("do_local_cmd: waitpid: %s", strerror(errno));
215
216 do_cmd_pid = -1;
217
218 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
219 return (-1);
220
221 return (0);
222 }
223
224 /*
225 * This function executes the given command as the specified user on the
226 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
227 * assigns the input and output file descriptors on success.
228 */
229
230 int
do_cmd(char * host,char * remuser,char * cmd,int * fdin,int * fdout)231 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
232 {
233 int pin[2], pout[2], reserved[2];
234
235 if (verbose_mode)
236 fmprintf(stderr,
237 "Executing: program %s host %s, user %s, command %s\n",
238 ssh_program, host,
239 remuser ? remuser : "(unspecified)", cmd);
240
241 /*
242 * Reserve two descriptors so that the real pipes won't get
243 * descriptors 0 and 1 because that will screw up dup2 below.
244 */
245 if (pipe(reserved) < 0)
246 fatal("pipe: %s", strerror(errno));
247
248 /* Create a socket pair for communicating with ssh. */
249 if (pipe(pin) < 0)
250 fatal("pipe: %s", strerror(errno));
251 if (pipe(pout) < 0)
252 fatal("pipe: %s", strerror(errno));
253
254 /* Free the reserved descriptors. */
255 close(reserved[0]);
256 close(reserved[1]);
257
258 signal(SIGTSTP, suspchild);
259 signal(SIGTTIN, suspchild);
260 signal(SIGTTOU, suspchild);
261
262 /* Fork a child to execute the command on the remote host using ssh. */
263 do_cmd_pid = fork();
264 if (do_cmd_pid == 0) {
265 /* Child. */
266 close(pin[1]);
267 close(pout[0]);
268 dup2(pin[0], 0);
269 dup2(pout[1], 1);
270 close(pin[0]);
271 close(pout[1]);
272
273 replacearg(&args, 0, "%s", ssh_program);
274 if (remuser != NULL) {
275 addargs(&args, "-l");
276 addargs(&args, "%s", remuser);
277 }
278 addargs(&args, "--");
279 addargs(&args, "%s", host);
280 addargs(&args, "%s", cmd);
281
282 execvp(ssh_program, args.list);
283 perror(ssh_program);
284 exit(1);
285 } else if (do_cmd_pid == -1) {
286 fatal("fork: %s", strerror(errno));
287 }
288 /* Parent. Close the other side, and return the local side. */
289 close(pin[0]);
290 *fdout = pin[1];
291 close(pout[1]);
292 *fdin = pout[0];
293 signal(SIGTERM, killchild);
294 signal(SIGINT, killchild);
295 signal(SIGHUP, killchild);
296 return 0;
297 }
298
299 /*
300 * This functions executes a command simlar to do_cmd(), but expects the
301 * input and output descriptors to be setup by a previous call to do_cmd().
302 * This way the input and output of two commands can be connected.
303 */
304 int
do_cmd2(char * host,char * remuser,char * cmd,int fdin,int fdout)305 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout)
306 {
307 pid_t pid;
308 int status;
309
310 if (verbose_mode)
311 fmprintf(stderr,
312 "Executing: 2nd program %s host %s, user %s, command %s\n",
313 ssh_program, host,
314 remuser ? remuser : "(unspecified)", cmd);
315
316 /* Fork a child to execute the command on the remote host using ssh. */
317 pid = fork();
318 if (pid == 0) {
319 dup2(fdin, 0);
320 dup2(fdout, 1);
321
322 replacearg(&args, 0, "%s", ssh_program);
323 if (remuser != NULL) {
324 addargs(&args, "-l");
325 addargs(&args, "%s", remuser);
326 }
327 addargs(&args, "--");
328 addargs(&args, "%s", host);
329 addargs(&args, "%s", cmd);
330
331 execvp(ssh_program, args.list);
332 perror(ssh_program);
333 exit(1);
334 } else if (pid == -1) {
335 fatal("fork: %s", strerror(errno));
336 }
337 while (waitpid(pid, &status, 0) == -1)
338 if (errno != EINTR)
339 fatal("do_cmd2: waitpid: %s", strerror(errno));
340 return 0;
341 }
342
343 typedef struct {
344 size_t cnt;
345 char *buf;
346 } BUF;
347
348 BUF *allocbuf(BUF *, int, int);
349 void lostconn(int);
350 int okname(char *);
351 void run_err(const char *,...);
352 void verifydir(char *);
353
354 struct passwd *pwd;
355 uid_t userid;
356 int errs, remin, remout;
357 int pflag, iamremote, iamrecursive, targetshouldbedirectory;
358
359 #define CMDNEEDS 64
360 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
361
362 int response(void);
363 void rsource(char *, struct stat *);
364 void sink(int, char *[]);
365 void source(int, char *[]);
366 void tolocal(int, char *[]);
367 void toremote(char *, int, char *[]);
368 void usage(void);
369
370 int
main(int argc,char ** argv)371 main(int argc, char **argv)
372 {
373 int ch, fflag, tflag, status, n;
374 char *targ, **newargv;
375 const char *errstr;
376 extern char *optarg;
377 extern int optind;
378
379 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
380 sanitise_stdfd();
381
382 msetlocale();
383
384 /* Copy argv, because we modify it */
385 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
386 for (n = 0; n < argc; n++)
387 newargv[n] = xstrdup(argv[n]);
388 argv = newargv;
389
390 __progname = ssh_get_progname(argv[0]);
391
392 memset(&args, '\0', sizeof(args));
393 memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
394 args.list = remote_remote_args.list = NULL;
395 addargs(&args, "%s", ssh_program);
396 addargs(&args, "-x");
397 addargs(&args, "-oForwardAgent=no");
398 addargs(&args, "-oPermitLocalCommand=no");
399 addargs(&args, "-oClearAllForwardings=yes");
400
401 fflag = tflag = 0;
402 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1)
403 switch (ch) {
404 /* User-visible flags. */
405 case '1':
406 case '2':
407 case '4':
408 case '6':
409 case 'C':
410 addargs(&args, "-%c", ch);
411 addargs(&remote_remote_args, "-%c", ch);
412 break;
413 case '3':
414 throughlocal = 1;
415 break;
416 case 'o':
417 case 'c':
418 case 'i':
419 case 'F':
420 addargs(&remote_remote_args, "-%c", ch);
421 addargs(&remote_remote_args, "%s", optarg);
422 addargs(&args, "-%c", ch);
423 addargs(&args, "%s", optarg);
424 break;
425 case 'P':
426 addargs(&remote_remote_args, "-p");
427 addargs(&remote_remote_args, "%s", optarg);
428 addargs(&args, "-p");
429 addargs(&args, "%s", optarg);
430 break;
431 case 'B':
432 addargs(&remote_remote_args, "-oBatchmode=yes");
433 addargs(&args, "-oBatchmode=yes");
434 break;
435 case 'l':
436 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
437 &errstr);
438 if (errstr != NULL)
439 usage();
440 limit_kbps *= 1024; /* kbps */
441 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
442 break;
443 case 'p':
444 pflag = 1;
445 break;
446 case 'r':
447 iamrecursive = 1;
448 break;
449 case 'S':
450 ssh_program = xstrdup(optarg);
451 break;
452 case 'v':
453 addargs(&args, "-v");
454 addargs(&remote_remote_args, "-v");
455 verbose_mode = 1;
456 break;
457 case 'q':
458 addargs(&args, "-q");
459 addargs(&remote_remote_args, "-q");
460 showprogress = 0;
461 break;
462
463 /* Server options. */
464 case 'd':
465 targetshouldbedirectory = 1;
466 break;
467 case 'f': /* "from" */
468 iamremote = 1;
469 fflag = 1;
470 break;
471 case 't': /* "to" */
472 iamremote = 1;
473 tflag = 1;
474 #ifdef HAVE_CYGWIN
475 setmode(0, O_BINARY);
476 #endif
477 break;
478 default:
479 usage();
480 }
481 argc -= optind;
482 argv += optind;
483
484 if ((pwd = getpwuid(userid = getuid())) == NULL)
485 fatal("unknown user %u", (u_int) userid);
486
487 if (!isatty(STDOUT_FILENO))
488 showprogress = 0;
489
490 if (pflag) {
491 /* Cannot pledge: -p allows setuid/setgid files... */
492 } else {
493 if (pledge("stdio rpath wpath cpath fattr tty proc exec",
494 NULL) == -1) {
495 perror("pledge");
496 exit(1);
497 }
498 }
499
500 remin = STDIN_FILENO;
501 remout = STDOUT_FILENO;
502
503 if (fflag) {
504 /* Follow "protocol", send data. */
505 (void) response();
506 source(argc, argv);
507 exit(errs != 0);
508 }
509 if (tflag) {
510 /* Receive data. */
511 sink(argc, argv);
512 exit(errs != 0);
513 }
514 if (argc < 2)
515 usage();
516 if (argc > 2)
517 targetshouldbedirectory = 1;
518
519 remin = remout = -1;
520 do_cmd_pid = -1;
521 /* Command to be executed on remote system using "ssh". */
522 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
523 verbose_mode ? " -v" : "",
524 iamrecursive ? " -r" : "", pflag ? " -p" : "",
525 targetshouldbedirectory ? " -d" : "");
526
527 (void) signal(SIGPIPE, lostconn);
528
529 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
530 toremote(targ, argc, argv);
531 else {
532 if (targetshouldbedirectory)
533 verifydir(argv[argc - 1]);
534 tolocal(argc, argv); /* Dest is local host. */
535 }
536 /*
537 * Finally check the exit status of the ssh process, if one was forked
538 * and no error has occurred yet
539 */
540 if (do_cmd_pid != -1 && errs == 0) {
541 if (remin != -1)
542 (void) close(remin);
543 if (remout != -1)
544 (void) close(remout);
545 if (waitpid(do_cmd_pid, &status, 0) == -1)
546 errs = 1;
547 else {
548 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
549 errs = 1;
550 }
551 }
552 exit(errs != 0);
553 }
554
555 /* Callback from atomicio6 to update progress meter and limit bandwidth */
556 static int
scpio(void * _cnt,size_t s)557 scpio(void *_cnt, size_t s)
558 {
559 off_t *cnt = (off_t *)_cnt;
560
561 *cnt += s;
562 if (limit_kbps > 0)
563 bandwidth_limit(&bwlimit, s);
564 return 0;
565 }
566
567 static int
do_times(int fd,int verb,const struct stat * sb)568 do_times(int fd, int verb, const struct stat *sb)
569 {
570 /* strlen(2^64) == 20; strlen(10^6) == 7 */
571 char buf[(20 + 7 + 2) * 2 + 2];
572
573 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
574 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
575 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
576 if (verb) {
577 fprintf(stderr, "File mtime %lld atime %lld\n",
578 (long long)sb->st_mtime, (long long)sb->st_atime);
579 fprintf(stderr, "Sending file timestamps: %s", buf);
580 }
581 (void) atomicio(vwrite, fd, buf, strlen(buf));
582 return (response());
583 }
584
585 void
toremote(char * targ,int argc,char ** argv)586 toremote(char *targ, int argc, char **argv)
587 {
588 char *bp, *host, *src, *suser, *thost, *tuser, *arg;
589 arglist alist;
590 int i;
591 u_int j;
592
593 memset(&alist, '\0', sizeof(alist));
594 alist.list = NULL;
595
596 *targ++ = 0;
597 if (*targ == 0)
598 targ = ".";
599
600 arg = xstrdup(argv[argc - 1]);
601 if ((thost = strrchr(arg, '@'))) {
602 /* user@host */
603 *thost++ = 0;
604 tuser = arg;
605 if (*tuser == '\0')
606 tuser = NULL;
607 } else {
608 thost = arg;
609 tuser = NULL;
610 }
611
612 if (tuser != NULL && !okname(tuser)) {
613 free(arg);
614 return;
615 }
616
617 for (i = 0; i < argc - 1; i++) {
618 src = colon(argv[i]);
619 if (src && throughlocal) { /* extended remote to remote */
620 *src++ = 0;
621 if (*src == 0)
622 src = ".";
623 host = strrchr(argv[i], '@');
624 if (host) {
625 *host++ = 0;
626 host = cleanhostname(host);
627 suser = argv[i];
628 if (*suser == '\0')
629 suser = pwd->pw_name;
630 else if (!okname(suser))
631 continue;
632 } else {
633 host = cleanhostname(argv[i]);
634 suser = NULL;
635 }
636 xasprintf(&bp, "%s -f %s%s", cmd,
637 *src == '-' ? "-- " : "", src);
638 if (do_cmd(host, suser, bp, &remin, &remout) < 0)
639 exit(1);
640 free(bp);
641 host = cleanhostname(thost);
642 xasprintf(&bp, "%s -t %s%s", cmd,
643 *targ == '-' ? "-- " : "", targ);
644 if (do_cmd2(host, tuser, bp, remin, remout) < 0)
645 exit(1);
646 free(bp);
647 (void) close(remin);
648 (void) close(remout);
649 remin = remout = -1;
650 } else if (src) { /* standard remote to remote */
651 freeargs(&alist);
652 addargs(&alist, "%s", ssh_program);
653 addargs(&alist, "-x");
654 addargs(&alist, "-oClearAllForwardings=yes");
655 addargs(&alist, "-n");
656 for (j = 0; j < remote_remote_args.num; j++) {
657 addargs(&alist, "%s",
658 remote_remote_args.list[j]);
659 }
660 *src++ = 0;
661 if (*src == 0)
662 src = ".";
663 host = strrchr(argv[i], '@');
664
665 if (host) {
666 *host++ = 0;
667 host = cleanhostname(host);
668 suser = argv[i];
669 if (*suser == '\0')
670 suser = pwd->pw_name;
671 else if (!okname(suser))
672 continue;
673 addargs(&alist, "-l");
674 addargs(&alist, "%s", suser);
675 } else {
676 host = cleanhostname(argv[i]);
677 }
678 addargs(&alist, "--");
679 addargs(&alist, "%s", host);
680 addargs(&alist, "%s", cmd);
681 addargs(&alist, "%s", src);
682 addargs(&alist, "%s%s%s:%s",
683 tuser ? tuser : "", tuser ? "@" : "",
684 thost, targ);
685 if (do_local_cmd(&alist) != 0)
686 errs = 1;
687 } else { /* local to remote */
688 if (remin == -1) {
689 xasprintf(&bp, "%s -t %s%s", cmd,
690 *targ == '-' ? "-- " : "", targ);
691 host = cleanhostname(thost);
692 if (do_cmd(host, tuser, bp, &remin,
693 &remout) < 0)
694 exit(1);
695 if (response() < 0)
696 exit(1);
697 free(bp);
698 }
699 source(1, argv + i);
700 }
701 }
702 free(arg);
703 }
704
705 void
tolocal(int argc,char ** argv)706 tolocal(int argc, char **argv)
707 {
708 char *bp, *host, *src, *suser;
709 arglist alist;
710 int i;
711
712 memset(&alist, '\0', sizeof(alist));
713 alist.list = NULL;
714
715 for (i = 0; i < argc - 1; i++) {
716 if (!(src = colon(argv[i]))) { /* Local to local. */
717 freeargs(&alist);
718 addargs(&alist, "%s", _PATH_CP);
719 if (iamrecursive)
720 addargs(&alist, "-r");
721 if (pflag)
722 addargs(&alist, "-p");
723 addargs(&alist, "--");
724 addargs(&alist, "%s", argv[i]);
725 addargs(&alist, "%s", argv[argc-1]);
726 if (do_local_cmd(&alist))
727 ++errs;
728 continue;
729 }
730 *src++ = 0;
731 if (*src == 0)
732 src = ".";
733 if ((host = strrchr(argv[i], '@')) == NULL) {
734 host = argv[i];
735 suser = NULL;
736 } else {
737 *host++ = 0;
738 suser = argv[i];
739 if (*suser == '\0')
740 suser = pwd->pw_name;
741 }
742 host = cleanhostname(host);
743 xasprintf(&bp, "%s -f %s%s",
744 cmd, *src == '-' ? "-- " : "", src);
745 if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
746 free(bp);
747 ++errs;
748 continue;
749 }
750 free(bp);
751 sink(1, argv + argc - 1);
752 (void) close(remin);
753 remin = remout = -1;
754 }
755 }
756
757 void
source(int argc,char ** argv)758 source(int argc, char **argv)
759 {
760 struct stat stb;
761 static BUF buffer;
762 BUF *bp;
763 off_t i, statbytes;
764 size_t amt, nr;
765 int fd = -1, haderr, indx;
766 char *last, *name, buf[2048], encname[PATH_MAX];
767 int len;
768
769 for (indx = 0; indx < argc; ++indx) {
770 name = argv[indx];
771 statbytes = 0;
772 len = strlen(name);
773 while (len > 1 && name[len-1] == '/')
774 name[--len] = '\0';
775 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0)
776 goto syserr;
777 if (strchr(name, '\n') != NULL) {
778 strnvis(encname, name, sizeof(encname), VIS_NL);
779 name = encname;
780 }
781 if (fstat(fd, &stb) < 0) {
782 syserr: run_err("%s: %s", name, strerror(errno));
783 goto next;
784 }
785 if (stb.st_size < 0) {
786 run_err("%s: %s", name, "Negative file size");
787 goto next;
788 }
789 unset_nonblock(fd);
790 switch (stb.st_mode & S_IFMT) {
791 case S_IFREG:
792 break;
793 case S_IFDIR:
794 if (iamrecursive) {
795 rsource(name, &stb);
796 goto next;
797 }
798 /* FALLTHROUGH */
799 default:
800 run_err("%s: not a regular file", name);
801 goto next;
802 }
803 if ((last = strrchr(name, '/')) == NULL)
804 last = name;
805 else
806 ++last;
807 curfile = last;
808 if (pflag) {
809 if (do_times(remout, verbose_mode, &stb) < 0)
810 goto next;
811 }
812 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
813 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
814 (u_int) (stb.st_mode & FILEMODEMASK),
815 (long long)stb.st_size, last);
816 if (verbose_mode)
817 fmprintf(stderr, "Sending file modes: %s", buf);
818 (void) atomicio(vwrite, remout, buf, strlen(buf));
819 if (response() < 0)
820 goto next;
821 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
822 next: if (fd != -1) {
823 (void) close(fd);
824 fd = -1;
825 }
826 continue;
827 }
828 if (showprogress)
829 start_progress_meter(curfile, stb.st_size, &statbytes);
830 set_nonblock(remout);
831 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
832 amt = bp->cnt;
833 if (i + (off_t)amt > stb.st_size)
834 amt = stb.st_size - i;
835 if (!haderr) {
836 if ((nr = atomicio(read, fd,
837 bp->buf, amt)) != amt) {
838 haderr = errno;
839 memset(bp->buf + nr, 0, amt - nr);
840 }
841 }
842 /* Keep writing after error to retain sync */
843 if (haderr) {
844 (void)atomicio(vwrite, remout, bp->buf, amt);
845 memset(bp->buf, 0, amt);
846 continue;
847 }
848 if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
849 &statbytes) != amt)
850 haderr = errno;
851 }
852 unset_nonblock(remout);
853
854 if (fd != -1) {
855 if (close(fd) < 0 && !haderr)
856 haderr = errno;
857 fd = -1;
858 }
859 if (!haderr)
860 (void) atomicio(vwrite, remout, "", 1);
861 else
862 run_err("%s: %s", name, strerror(haderr));
863 (void) response();
864 if (showprogress)
865 stop_progress_meter();
866 }
867 }
868
869 void
rsource(char * name,struct stat * statp)870 rsource(char *name, struct stat *statp)
871 {
872 DIR *dirp;
873 struct dirent *dp;
874 char *last, *vect[1], path[PATH_MAX];
875
876 if (!(dirp = opendir(name))) {
877 run_err("%s: %s", name, strerror(errno));
878 return;
879 }
880 last = strrchr(name, '/');
881 if (last == NULL)
882 last = name;
883 else
884 last++;
885 if (pflag) {
886 if (do_times(remout, verbose_mode, statp) < 0) {
887 closedir(dirp);
888 return;
889 }
890 }
891 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
892 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
893 if (verbose_mode)
894 fmprintf(stderr, "Entering directory: %s", path);
895 (void) atomicio(vwrite, remout, path, strlen(path));
896 if (response() < 0) {
897 closedir(dirp);
898 return;
899 }
900 while ((dp = readdir(dirp)) != NULL) {
901 if (dp->d_ino == 0)
902 continue;
903 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
904 continue;
905 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
906 run_err("%s/%s: name too long", name, dp->d_name);
907 continue;
908 }
909 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
910 vect[0] = path;
911 source(1, vect);
912 }
913 (void) closedir(dirp);
914 (void) atomicio(vwrite, remout, "E\n", 2);
915 (void) response();
916 }
917
918 void
sink(int argc,char ** argv)919 sink(int argc, char **argv)
920 {
921 static BUF buffer;
922 struct stat stb;
923 enum {
924 YES, NO, DISPLAYED
925 } wrerr;
926 BUF *bp;
927 off_t i;
928 size_t j, count;
929 int amt, exists, first, ofd;
930 mode_t mode, omode, mask;
931 off_t size, statbytes;
932 unsigned long long ull;
933 int setimes, targisdir, wrerrno = 0;
934 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
935 struct timeval tv[2];
936
937 #define atime tv[0]
938 #define mtime tv[1]
939 #define SCREWUP(str) { why = str; goto screwup; }
940
941 setimes = targisdir = 0;
942 mask = umask(0);
943 if (!pflag)
944 (void) umask(mask);
945 if (argc != 1) {
946 run_err("ambiguous target");
947 exit(1);
948 }
949 targ = *argv;
950 if (targetshouldbedirectory)
951 verifydir(targ);
952
953 (void) atomicio(vwrite, remout, "", 1);
954 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
955 targisdir = 1;
956 for (first = 1;; first = 0) {
957 cp = buf;
958 if (atomicio(read, remin, cp, 1) != 1)
959 return;
960 if (*cp++ == '\n')
961 SCREWUP("unexpected <newline>");
962 do {
963 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
964 SCREWUP("lost connection");
965 *cp++ = ch;
966 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
967 *cp = 0;
968 if (verbose_mode)
969 fmprintf(stderr, "Sink: %s", buf);
970
971 if (buf[0] == '\01' || buf[0] == '\02') {
972 if (iamremote == 0) {
973 (void) snmprintf(visbuf, sizeof(visbuf),
974 NULL, "%s", buf + 1);
975 (void) atomicio(vwrite, STDERR_FILENO,
976 visbuf, strlen(visbuf));
977 }
978 if (buf[0] == '\02')
979 exit(1);
980 ++errs;
981 continue;
982 }
983 if (buf[0] == 'E') {
984 (void) atomicio(vwrite, remout, "", 1);
985 return;
986 }
987 if (ch == '\n')
988 *--cp = 0;
989
990 cp = buf;
991 if (*cp == 'T') {
992 setimes++;
993 cp++;
994 if (!isdigit((unsigned char)*cp))
995 SCREWUP("mtime.sec not present");
996 ull = strtoull(cp, &cp, 10);
997 if (!cp || *cp++ != ' ')
998 SCREWUP("mtime.sec not delimited");
999 if ((time_t)ull < 0 ||
1000 (unsigned long long)(time_t)ull != ull)
1001 setimes = 0; /* out of range */
1002 mtime.tv_sec = ull;
1003 mtime.tv_usec = strtol(cp, &cp, 10);
1004 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
1005 mtime.tv_usec > 999999)
1006 SCREWUP("mtime.usec not delimited");
1007 if (!isdigit((unsigned char)*cp))
1008 SCREWUP("atime.sec not present");
1009 ull = strtoull(cp, &cp, 10);
1010 if (!cp || *cp++ != ' ')
1011 SCREWUP("atime.sec not delimited");
1012 if ((time_t)ull < 0 ||
1013 (unsigned long long)(time_t)ull != ull)
1014 setimes = 0; /* out of range */
1015 atime.tv_sec = ull;
1016 atime.tv_usec = strtol(cp, &cp, 10);
1017 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
1018 atime.tv_usec > 999999)
1019 SCREWUP("atime.usec not delimited");
1020 (void) atomicio(vwrite, remout, "", 1);
1021 continue;
1022 }
1023 if (*cp != 'C' && *cp != 'D') {
1024 /*
1025 * Check for the case "rcp remote:foo\* local:bar".
1026 * In this case, the line "No match." can be returned
1027 * by the shell before the rcp command on the remote is
1028 * executed so the ^Aerror_message convention isn't
1029 * followed.
1030 */
1031 if (first) {
1032 run_err("%s", cp);
1033 exit(1);
1034 }
1035 SCREWUP("expected control record");
1036 }
1037 mode = 0;
1038 for (++cp; cp < buf + 5; cp++) {
1039 if (*cp < '0' || *cp > '7')
1040 SCREWUP("bad mode");
1041 mode = (mode << 3) | (*cp - '0');
1042 }
1043 if (*cp++ != ' ')
1044 SCREWUP("mode not delimited");
1045
1046 for (size = 0; isdigit((unsigned char)*cp);)
1047 size = size * 10 + (*cp++ - '0');
1048 if (*cp++ != ' ')
1049 SCREWUP("size not delimited");
1050 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
1051 run_err("error: unexpected filename: %s", cp);
1052 exit(1);
1053 }
1054 if (targisdir) {
1055 static char *namebuf;
1056 static size_t cursize;
1057 size_t need;
1058
1059 need = strlen(targ) + strlen(cp) + 250;
1060 if (need > cursize) {
1061 free(namebuf);
1062 namebuf = xmalloc(need);
1063 cursize = need;
1064 }
1065 (void) snprintf(namebuf, need, "%s%s%s", targ,
1066 strcmp(targ, "/") ? "/" : "", cp);
1067 np = namebuf;
1068 } else
1069 np = targ;
1070 curfile = cp;
1071 exists = stat(np, &stb) == 0;
1072 if (buf[0] == 'D') {
1073 int mod_flag = pflag;
1074 if (!iamrecursive)
1075 SCREWUP("received directory without -r");
1076 if (exists) {
1077 if (!S_ISDIR(stb.st_mode)) {
1078 errno = ENOTDIR;
1079 goto bad;
1080 }
1081 if (pflag)
1082 (void) chmod(np, mode);
1083 } else {
1084 /* Handle copying from a read-only
1085 directory */
1086 mod_flag = 1;
1087 if (mkdir(np, mode | S_IRWXU) < 0)
1088 goto bad;
1089 }
1090 vect[0] = xstrdup(np);
1091 sink(1, vect);
1092 if (setimes) {
1093 setimes = 0;
1094 if (utimes(vect[0], tv) < 0)
1095 run_err("%s: set times: %s",
1096 vect[0], strerror(errno));
1097 }
1098 if (mod_flag)
1099 (void) chmod(vect[0], mode);
1100 free(vect[0]);
1101 continue;
1102 }
1103 omode = mode;
1104 mode |= S_IWUSR;
1105 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
1106 bad: run_err("%s: %s", np, strerror(errno));
1107 continue;
1108 }
1109 (void) atomicio(vwrite, remout, "", 1);
1110 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
1111 (void) close(ofd);
1112 continue;
1113 }
1114 cp = bp->buf;
1115 wrerr = NO;
1116
1117 statbytes = 0;
1118 if (showprogress)
1119 start_progress_meter(curfile, size, &statbytes);
1120 set_nonblock(remin);
1121 for (count = i = 0; i < size; i += bp->cnt) {
1122 amt = bp->cnt;
1123 if (i + amt > size)
1124 amt = size - i;
1125 count += amt;
1126 do {
1127 j = atomicio6(read, remin, cp, amt,
1128 scpio, &statbytes);
1129 if (j == 0) {
1130 run_err("%s", j != EPIPE ?
1131 strerror(errno) :
1132 "dropped connection");
1133 exit(1);
1134 }
1135 amt -= j;
1136 cp += j;
1137 } while (amt > 0);
1138
1139 if (count == bp->cnt) {
1140 /* Keep reading so we stay sync'd up. */
1141 if (wrerr == NO) {
1142 if (atomicio(vwrite, ofd, bp->buf,
1143 count) != count) {
1144 wrerr = YES;
1145 wrerrno = errno;
1146 }
1147 }
1148 count = 0;
1149 cp = bp->buf;
1150 }
1151 }
1152 unset_nonblock(remin);
1153 if (count != 0 && wrerr == NO &&
1154 atomicio(vwrite, ofd, bp->buf, count) != count) {
1155 wrerr = YES;
1156 wrerrno = errno;
1157 }
1158 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) &&
1159 ftruncate(ofd, size) != 0) {
1160 run_err("%s: truncate: %s", np, strerror(errno));
1161 wrerr = DISPLAYED;
1162 }
1163 if (pflag) {
1164 if (exists || omode != mode)
1165 #ifdef HAVE_FCHMOD
1166 if (fchmod(ofd, omode)) {
1167 #else /* HAVE_FCHMOD */
1168 if (chmod(np, omode)) {
1169 #endif /* HAVE_FCHMOD */
1170 run_err("%s: set mode: %s",
1171 np, strerror(errno));
1172 wrerr = DISPLAYED;
1173 }
1174 } else {
1175 if (!exists && omode != mode)
1176 #ifdef HAVE_FCHMOD
1177 if (fchmod(ofd, omode & ~mask)) {
1178 #else /* HAVE_FCHMOD */
1179 if (chmod(np, omode & ~mask)) {
1180 #endif /* HAVE_FCHMOD */
1181 run_err("%s: set mode: %s",
1182 np, strerror(errno));
1183 wrerr = DISPLAYED;
1184 }
1185 }
1186 if (close(ofd) == -1) {
1187 wrerr = YES;
1188 wrerrno = errno;
1189 }
1190 (void) response();
1191 if (showprogress)
1192 stop_progress_meter();
1193 if (setimes && wrerr == NO) {
1194 setimes = 0;
1195 if (utimes(np, tv) < 0) {
1196 run_err("%s: set times: %s",
1197 np, strerror(errno));
1198 wrerr = DISPLAYED;
1199 }
1200 }
1201 switch (wrerr) {
1202 case YES:
1203 run_err("%s: %s", np, strerror(wrerrno));
1204 break;
1205 case NO:
1206 (void) atomicio(vwrite, remout, "", 1);
1207 break;
1208 case DISPLAYED:
1209 break;
1210 }
1211 }
1212 screwup:
1213 run_err("protocol error: %s", why);
1214 exit(1);
1215 }
1216
1217 int
1218 response(void)
1219 {
1220 char ch, *cp, resp, rbuf[2048], visbuf[2048];
1221
1222 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1223 lostconn(0);
1224
1225 cp = rbuf;
1226 switch (resp) {
1227 case 0: /* ok */
1228 return (0);
1229 default:
1230 *cp++ = resp;
1231 /* FALLTHROUGH */
1232 case 1: /* error, followed by error msg */
1233 case 2: /* fatal error, "" */
1234 do {
1235 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1236 lostconn(0);
1237 *cp++ = ch;
1238 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1239
1240 if (!iamremote) {
1241 cp[-1] = '\0';
1242 (void) snmprintf(visbuf, sizeof(visbuf),
1243 NULL, "%s\n", rbuf);
1244 (void) atomicio(vwrite, STDERR_FILENO,
1245 visbuf, strlen(visbuf));
1246 }
1247 ++errs;
1248 if (resp == 1)
1249 return (-1);
1250 exit(1);
1251 }
1252 /* NOTREACHED */
1253 }
1254
1255 void
1256 usage(void)
1257 {
1258 (void) fprintf(stderr,
1259 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1260 " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1261 " [[user@]host1:]file1 ... [[user@]host2:]file2\n");
1262 exit(1);
1263 }
1264
1265 void
1266 run_err(const char *fmt,...)
1267 {
1268 static FILE *fp;
1269 va_list ap;
1270
1271 ++errs;
1272 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1273 (void) fprintf(fp, "%c", 0x01);
1274 (void) fprintf(fp, "scp: ");
1275 va_start(ap, fmt);
1276 (void) vfprintf(fp, fmt, ap);
1277 va_end(ap);
1278 (void) fprintf(fp, "\n");
1279 (void) fflush(fp);
1280 }
1281
1282 if (!iamremote) {
1283 va_start(ap, fmt);
1284 vfmprintf(stderr, fmt, ap);
1285 va_end(ap);
1286 fprintf(stderr, "\n");
1287 }
1288 }
1289
1290 void
1291 verifydir(char *cp)
1292 {
1293 struct stat stb;
1294
1295 if (!stat(cp, &stb)) {
1296 if (S_ISDIR(stb.st_mode))
1297 return;
1298 errno = ENOTDIR;
1299 }
1300 run_err("%s: %s", cp, strerror(errno));
1301 killchild(0);
1302 }
1303
1304 int
1305 okname(char *cp0)
1306 {
1307 int c;
1308 char *cp;
1309
1310 cp = cp0;
1311 do {
1312 c = (int)*cp;
1313 if (c & 0200)
1314 goto bad;
1315 if (!isalpha(c) && !isdigit((unsigned char)c)) {
1316 switch (c) {
1317 case '\'':
1318 case '"':
1319 case '`':
1320 case ' ':
1321 case '#':
1322 goto bad;
1323 default:
1324 break;
1325 }
1326 }
1327 } while (*++cp);
1328 return (1);
1329
1330 bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
1331 return (0);
1332 }
1333
1334 BUF *
1335 allocbuf(BUF *bp, int fd, int blksize)
1336 {
1337 size_t size;
1338 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1339 struct stat stb;
1340
1341 if (fstat(fd, &stb) < 0) {
1342 run_err("fstat: %s", strerror(errno));
1343 return (0);
1344 }
1345 size = ROUNDUP(stb.st_blksize, blksize);
1346 if (size == 0)
1347 size = blksize;
1348 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1349 size = blksize;
1350 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1351 if (bp->cnt >= size)
1352 return (bp);
1353 if (bp->buf == NULL)
1354 bp->buf = xmalloc(size);
1355 else
1356 bp->buf = xreallocarray(bp->buf, 1, size);
1357 memset(bp->buf, 0, size);
1358 bp->cnt = size;
1359 return (bp);
1360 }
1361
1362 void
1363 lostconn(int signo)
1364 {
1365 if (!iamremote)
1366 (void)write(STDERR_FILENO, "lost connection\n", 16);
1367 if (signo)
1368 _exit(1);
1369 else
1370 exit(1);
1371 }
1372