]> andersk Git - openssh.git/blame_incremental - scp.c
- markus@cvs.openbsd.org 2005/06/16 08:00:00
[openssh.git] / scp.c
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CommitLineData
1/*
2 * scp - secure remote copy. This is basically patched BSD rcp which
3 * uses ssh to do the data transfer (instead of using rcmd).
4 *
5 * NOTE: This version should NOT be suid root. (This uses ssh to
6 * do the transfer and ssh has the necessary privileges.)
7 *
8 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
9 *
10 * As far as I am concerned, the code I have written for this software
11 * can be used freely for any purpose. Any derived versions of this
12 * software must be clearly marked as such, and if the derived work is
13 * incompatible with the protocol description in the RFC file, it must be
14 * called by a name other than "ssh" or "Secure Shell".
15 */
16/*
17 * Copyright (c) 1999 Theo de Raadt. All rights reserved.
18 * Copyright (c) 1999 Aaron Campbell. All rights reserved.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 */
40
41/*
42 * Parts from:
43 *
44 * Copyright (c) 1983, 1990, 1992, 1993, 1995
45 * The Regents of the University of California. All rights reserved.
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 * 1. Redistributions of source code must retain the above copyright
51 * notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 */
72
73#include "includes.h"
74RCSID("$OpenBSD: scp.c,v 1.123 2005/05/26 02:08:05 avsm Exp $");
75
76#include "xmalloc.h"
77#include "atomicio.h"
78#include "pathnames.h"
79#include "log.h"
80#include "misc.h"
81#include "progressmeter.h"
82
83extern char *__progname;
84
85void bwlimit(int);
86
87/* Struct for addargs */
88arglist args;
89
90/* Bandwidth limit */
91off_t limit_rate = 0;
92
93/* Name of current file being transferred. */
94char *curfile;
95
96/* This is set to non-zero to enable verbose mode. */
97int verbose_mode = 0;
98
99/* This is set to zero if the progressmeter is not desired. */
100int showprogress = 1;
101
102/* This is the program to execute for the secured connection. ("ssh" or -S) */
103char *ssh_program = _PATH_SSH_PROGRAM;
104
105/* This is used to store the pid of ssh_program */
106pid_t do_cmd_pid = -1;
107
108static void
109killchild(int signo)
110{
111 if (do_cmd_pid > 1) {
112 kill(do_cmd_pid, signo ? signo : SIGTERM);
113 waitpid(do_cmd_pid, NULL, 0);
114 }
115
116 if (signo)
117 _exit(1);
118 exit(1);
119}
120
121/*
122 * This function executes the given command as the specified user on the
123 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
124 * assigns the input and output file descriptors on success.
125 */
126
127int
128do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
129{
130 int pin[2], pout[2], reserved[2];
131
132 if (verbose_mode)
133 fprintf(stderr,
134 "Executing: program %s host %s, user %s, command %s\n",
135 ssh_program, host,
136 remuser ? remuser : "(unspecified)", cmd);
137
138 /*
139 * Reserve two descriptors so that the real pipes won't get
140 * descriptors 0 and 1 because that will screw up dup2 below.
141 */
142 pipe(reserved);
143
144 /* Create a socket pair for communicating with ssh. */
145 if (pipe(pin) < 0)
146 fatal("pipe: %s", strerror(errno));
147 if (pipe(pout) < 0)
148 fatal("pipe: %s", strerror(errno));
149
150 /* Free the reserved descriptors. */
151 close(reserved[0]);
152 close(reserved[1]);
153
154 /* Fork a child to execute the command on the remote host using ssh. */
155 do_cmd_pid = fork();
156 if (do_cmd_pid == 0) {
157 /* Child. */
158 close(pin[1]);
159 close(pout[0]);
160 dup2(pin[0], 0);
161 dup2(pout[1], 1);
162 close(pin[0]);
163 close(pout[1]);
164
165 args.list[0] = ssh_program;
166 if (remuser != NULL)
167 addargs(&args, "-l%s", remuser);
168 addargs(&args, "%s", host);
169 addargs(&args, "%s", cmd);
170
171 execvp(ssh_program, args.list);
172 perror(ssh_program);
173 exit(1);
174 } else if (do_cmd_pid == -1) {
175 fatal("fork: %s", strerror(errno));
176 }
177 /* Parent. Close the other side, and return the local side. */
178 close(pin[0]);
179 *fdout = pin[1];
180 close(pout[1]);
181 *fdin = pout[0];
182 signal(SIGTERM, killchild);
183 signal(SIGINT, killchild);
184 signal(SIGHUP, killchild);
185 return 0;
186}
187
188typedef struct {
189 int cnt;
190 char *buf;
191} BUF;
192
193BUF *allocbuf(BUF *, int, int);
194void lostconn(int);
195void nospace(void);
196int okname(char *);
197void run_err(const char *,...);
198void verifydir(char *);
199
200struct passwd *pwd;
201uid_t userid;
202int errs, remin, remout;
203int pflag, iamremote, iamrecursive, targetshouldbedirectory;
204
205#define CMDNEEDS 64
206char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
207
208int response(void);
209void rsource(char *, struct stat *);
210void sink(int, char *[]);
211void source(int, char *[]);
212void tolocal(int, char *[]);
213void toremote(char *, int, char *[]);
214void usage(void);
215
216int
217main(int argc, char **argv)
218{
219 int ch, fflag, tflag, status;
220 double speed;
221 char *targ, *endp;
222 extern char *optarg;
223 extern int optind;
224
225 __progname = ssh_get_progname(argv[0]);
226
227 args.list = NULL;
228 addargs(&args, "ssh"); /* overwritten with ssh_program */
229 addargs(&args, "-x");
230 addargs(&args, "-oForwardAgent no");
231 addargs(&args, "-oClearAllForwardings yes");
232
233 fflag = tflag = 0;
234 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
235 switch (ch) {
236 /* User-visible flags. */
237 case '1':
238 case '2':
239 case '4':
240 case '6':
241 case 'C':
242 addargs(&args, "-%c", ch);
243 break;
244 case 'o':
245 case 'c':
246 case 'i':
247 case 'F':
248 addargs(&args, "-%c%s", ch, optarg);
249 break;
250 case 'P':
251 addargs(&args, "-p%s", optarg);
252 break;
253 case 'B':
254 addargs(&args, "-oBatchmode yes");
255 break;
256 case 'l':
257 speed = strtod(optarg, &endp);
258 if (speed <= 0 || *endp != '\0')
259 usage();
260 limit_rate = speed * 1024;
261 break;
262 case 'p':
263 pflag = 1;
264 break;
265 case 'r':
266 iamrecursive = 1;
267 break;
268 case 'S':
269 ssh_program = xstrdup(optarg);
270 break;
271 case 'v':
272 addargs(&args, "-v");
273 verbose_mode = 1;
274 break;
275 case 'q':
276 addargs(&args, "-q");
277 showprogress = 0;
278 break;
279
280 /* Server options. */
281 case 'd':
282 targetshouldbedirectory = 1;
283 break;
284 case 'f': /* "from" */
285 iamremote = 1;
286 fflag = 1;
287 break;
288 case 't': /* "to" */
289 iamremote = 1;
290 tflag = 1;
291#ifdef HAVE_CYGWIN
292 setmode(0, O_BINARY);
293#endif
294 break;
295 default:
296 usage();
297 }
298 argc -= optind;
299 argv += optind;
300
301 if ((pwd = getpwuid(userid = getuid())) == NULL)
302 fatal("unknown user %u", (u_int) userid);
303
304 if (!isatty(STDERR_FILENO))
305 showprogress = 0;
306
307 remin = STDIN_FILENO;
308 remout = STDOUT_FILENO;
309
310 if (fflag) {
311 /* Follow "protocol", send data. */
312 (void) response();
313 source(argc, argv);
314 exit(errs != 0);
315 }
316 if (tflag) {
317 /* Receive data. */
318 sink(argc, argv);
319 exit(errs != 0);
320 }
321 if (argc < 2)
322 usage();
323 if (argc > 2)
324 targetshouldbedirectory = 1;
325
326 remin = remout = -1;
327 do_cmd_pid = -1;
328 /* Command to be executed on remote system using "ssh". */
329 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
330 verbose_mode ? " -v" : "",
331 iamrecursive ? " -r" : "", pflag ? " -p" : "",
332 targetshouldbedirectory ? " -d" : "");
333
334 (void) signal(SIGPIPE, lostconn);
335
336 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
337 toremote(targ, argc, argv);
338 else {
339 tolocal(argc, argv); /* Dest is local host. */
340 if (targetshouldbedirectory)
341 verifydir(argv[argc - 1]);
342 }
343 /*
344 * Finally check the exit status of the ssh process, if one was forked
345 * and no error has occured yet
346 */
347 if (do_cmd_pid != -1 && errs == 0) {
348 if (remin != -1)
349 (void) close(remin);
350 if (remout != -1)
351 (void) close(remout);
352 if (waitpid(do_cmd_pid, &status, 0) == -1)
353 errs = 1;
354 else {
355 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
356 errs = 1;
357 }
358 }
359 exit(errs != 0);
360}
361
362void
363toremote(char *targ, int argc, char **argv)
364{
365 int i, len;
366 char *bp, *host, *src, *suser, *thost, *tuser, *arg;
367
368 *targ++ = 0;
369 if (*targ == 0)
370 targ = ".";
371
372 arg = xstrdup(argv[argc - 1]);
373 if ((thost = strrchr(arg, '@'))) {
374 /* user@host */
375 *thost++ = 0;
376 tuser = arg;
377 if (*tuser == '\0')
378 tuser = NULL;
379 } else {
380 thost = arg;
381 tuser = NULL;
382 }
383
384 for (i = 0; i < argc - 1; i++) {
385 src = colon(argv[i]);
386 if (src) { /* remote to remote */
387 static char *ssh_options =
388 "-x -o'ClearAllForwardings yes'";
389 *src++ = 0;
390 if (*src == 0)
391 src = ".";
392 host = strrchr(argv[i], '@');
393 len = strlen(ssh_program) + strlen(argv[i]) +
394 strlen(src) + (tuser ? strlen(tuser) : 0) +
395 strlen(thost) + strlen(targ) +
396 strlen(ssh_options) + CMDNEEDS + 20;
397 bp = xmalloc(len);
398 if (host) {
399 *host++ = 0;
400 host = cleanhostname(host);
401 suser = argv[i];
402 if (*suser == '\0')
403 suser = pwd->pw_name;
404 else if (!okname(suser)) {
405 xfree(bp);
406 continue;
407 }
408 if (tuser && !okname(tuser)) {
409 xfree(bp);
410 continue;
411 }
412 snprintf(bp, len,
413 "%s%s %s -n "
414 "-l %s %s %s %s '%s%s%s:%s'",
415 ssh_program, verbose_mode ? " -v" : "",
416 ssh_options, suser, host, cmd, src,
417 tuser ? tuser : "", tuser ? "@" : "",
418 thost, targ);
419 } else {
420 host = cleanhostname(argv[i]);
421 snprintf(bp, len,
422 "exec %s%s %s -n %s "
423 "%s %s '%s%s%s:%s'",
424 ssh_program, verbose_mode ? " -v" : "",
425 ssh_options, host, cmd, src,
426 tuser ? tuser : "", tuser ? "@" : "",
427 thost, targ);
428 }
429 if (verbose_mode)
430 fprintf(stderr, "Executing: %s\n", bp);
431 if (system(bp) != 0)
432 errs = 1;
433 (void) xfree(bp);
434 } else { /* local to remote */
435 if (remin == -1) {
436 len = strlen(targ) + CMDNEEDS + 20;
437 bp = xmalloc(len);
438 (void) snprintf(bp, len, "%s -t %s", cmd, targ);
439 host = cleanhostname(thost);
440 if (do_cmd(host, tuser, bp, &remin,
441 &remout, argc) < 0)
442 exit(1);
443 if (response() < 0)
444 exit(1);
445 (void) xfree(bp);
446 }
447 source(1, argv + i);
448 }
449 }
450}
451
452void
453tolocal(int argc, char **argv)
454{
455 int i, len;
456 char *bp, *host, *src, *suser;
457
458 for (i = 0; i < argc - 1; i++) {
459 if (!(src = colon(argv[i]))) { /* Local to local. */
460 len = strlen(_PATH_CP) + strlen(argv[i]) +
461 strlen(argv[argc - 1]) + 20;
462 bp = xmalloc(len);
463 (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
464 iamrecursive ? " -r" : "", pflag ? " -p" : "",
465 argv[i], argv[argc - 1]);
466 if (verbose_mode)
467 fprintf(stderr, "Executing: %s\n", bp);
468 if (system(bp))
469 ++errs;
470 (void) xfree(bp);
471 continue;
472 }
473 *src++ = 0;
474 if (*src == 0)
475 src = ".";
476 if ((host = strrchr(argv[i], '@')) == NULL) {
477 host = argv[i];
478 suser = NULL;
479 } else {
480 *host++ = 0;
481 suser = argv[i];
482 if (*suser == '\0')
483 suser = pwd->pw_name;
484 }
485 host = cleanhostname(host);
486 len = strlen(src) + CMDNEEDS + 20;
487 bp = xmalloc(len);
488 (void) snprintf(bp, len, "%s -f %s", cmd, src);
489 if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
490 (void) xfree(bp);
491 ++errs;
492 continue;
493 }
494 xfree(bp);
495 sink(1, argv + argc - 1);
496 (void) close(remin);
497 remin = remout = -1;
498 }
499}
500
501void
502source(int argc, char **argv)
503{
504 struct stat stb;
505 static BUF buffer;
506 BUF *bp;
507 off_t i, amt, statbytes;
508 size_t result;
509 int fd, haderr, indx;
510 char *last, *name, buf[2048];
511 int len;
512
513 for (indx = 0; indx < argc; ++indx) {
514 name = argv[indx];
515 statbytes = 0;
516 len = strlen(name);
517 while (len > 1 && name[len-1] == '/')
518 name[--len] = '\0';
519 if (strchr(name, '\n') != NULL) {
520 run_err("%s: skipping, filename contains a newline",
521 name);
522 goto next;
523 }
524 if ((fd = open(name, O_RDONLY, 0)) < 0)
525 goto syserr;
526 if (fstat(fd, &stb) < 0) {
527syserr: run_err("%s: %s", name, strerror(errno));
528 goto next;
529 }
530 switch (stb.st_mode & S_IFMT) {
531 case S_IFREG:
532 break;
533 case S_IFDIR:
534 if (iamrecursive) {
535 rsource(name, &stb);
536 goto next;
537 }
538 /* FALLTHROUGH */
539 default:
540 run_err("%s: not a regular file", name);
541 goto next;
542 }
543 if ((last = strrchr(name, '/')) == NULL)
544 last = name;
545 else
546 ++last;
547 curfile = last;
548 if (pflag) {
549 /*
550 * Make it compatible with possible future
551 * versions expecting microseconds.
552 */
553 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
554 (u_long) stb.st_mtime,
555 (u_long) stb.st_atime);
556 (void) atomicio(vwrite, remout, buf, strlen(buf));
557 if (response() < 0)
558 goto next;
559 }
560#define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
561 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
562 (u_int) (stb.st_mode & FILEMODEMASK),
563 (int64_t)stb.st_size, last);
564 if (verbose_mode) {
565 fprintf(stderr, "Sending file modes: %s", buf);
566 }
567 (void) atomicio(vwrite, remout, buf, strlen(buf));
568 if (response() < 0)
569 goto next;
570 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
571next: (void) close(fd);
572 continue;
573 }
574 if (showprogress)
575 start_progress_meter(curfile, stb.st_size, &statbytes);
576 /* Keep writing after an error so that we stay sync'd up. */
577 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
578 amt = bp->cnt;
579 if (i + amt > stb.st_size)
580 amt = stb.st_size - i;
581 if (!haderr) {
582 result = atomicio(read, fd, bp->buf, amt);
583 if (result != amt)
584 haderr = errno;
585 }
586 if (haderr)
587 (void) atomicio(vwrite, remout, bp->buf, amt);
588 else {
589 result = atomicio(vwrite, remout, bp->buf, amt);
590 if (result != amt)
591 haderr = errno;
592 statbytes += result;
593 }
594 if (limit_rate)
595 bwlimit(amt);
596 }
597 if (showprogress)
598 stop_progress_meter();
599
600 if (close(fd) < 0 && !haderr)
601 haderr = errno;
602 if (!haderr)
603 (void) atomicio(vwrite, remout, "", 1);
604 else
605 run_err("%s: %s", name, strerror(haderr));
606 (void) response();
607 }
608}
609
610void
611rsource(char *name, struct stat *statp)
612{
613 DIR *dirp;
614 struct dirent *dp;
615 char *last, *vect[1], path[1100];
616
617 if (!(dirp = opendir(name))) {
618 run_err("%s: %s", name, strerror(errno));
619 return;
620 }
621 last = strrchr(name, '/');
622 if (last == 0)
623 last = name;
624 else
625 last++;
626 if (pflag) {
627 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
628 (u_long) statp->st_mtime,
629 (u_long) statp->st_atime);
630 (void) atomicio(vwrite, remout, path, strlen(path));
631 if (response() < 0) {
632 closedir(dirp);
633 return;
634 }
635 }
636 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
637 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
638 if (verbose_mode)
639 fprintf(stderr, "Entering directory: %s", path);
640 (void) atomicio(vwrite, remout, path, strlen(path));
641 if (response() < 0) {
642 closedir(dirp);
643 return;
644 }
645 while ((dp = readdir(dirp)) != NULL) {
646 if (dp->d_ino == 0)
647 continue;
648 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
649 continue;
650 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
651 run_err("%s/%s: name too long", name, dp->d_name);
652 continue;
653 }
654 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
655 vect[0] = path;
656 source(1, vect);
657 }
658 (void) closedir(dirp);
659 (void) atomicio(vwrite, remout, "E\n", 2);
660 (void) response();
661}
662
663void
664bwlimit(int amount)
665{
666 static struct timeval bwstart, bwend;
667 static int lamt, thresh = 16384;
668 u_int64_t waitlen;
669 struct timespec ts, rm;
670
671 if (!timerisset(&bwstart)) {
672 gettimeofday(&bwstart, NULL);
673 return;
674 }
675
676 lamt += amount;
677 if (lamt < thresh)
678 return;
679
680 gettimeofday(&bwend, NULL);
681 timersub(&bwend, &bwstart, &bwend);
682 if (!timerisset(&bwend))
683 return;
684
685 lamt *= 8;
686 waitlen = (double)1000000L * lamt / limit_rate;
687
688 bwstart.tv_sec = waitlen / 1000000L;
689 bwstart.tv_usec = waitlen % 1000000L;
690
691 if (timercmp(&bwstart, &bwend, >)) {
692 timersub(&bwstart, &bwend, &bwend);
693
694 /* Adjust the wait time */
695 if (bwend.tv_sec) {
696 thresh /= 2;
697 if (thresh < 2048)
698 thresh = 2048;
699 } else if (bwend.tv_usec < 100) {
700 thresh *= 2;
701 if (thresh > 32768)
702 thresh = 32768;
703 }
704
705 TIMEVAL_TO_TIMESPEC(&bwend, &ts);
706 while (nanosleep(&ts, &rm) == -1) {
707 if (errno != EINTR)
708 break;
709 ts = rm;
710 }
711 }
712
713 lamt = 0;
714 gettimeofday(&bwstart, NULL);
715}
716
717void
718sink(int argc, char **argv)
719{
720 static BUF buffer;
721 struct stat stb;
722 enum {
723 YES, NO, DISPLAYED
724 } wrerr;
725 BUF *bp;
726 off_t i;
727 size_t j;
728 int amt, count, exists, first, mask, mode, ofd, omode;
729 off_t size, statbytes;
730 int setimes, targisdir, wrerrno = 0;
731 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
732 struct timeval tv[2];
733
734#define atime tv[0]
735#define mtime tv[1]
736#define SCREWUP(str) { why = str; goto screwup; }
737
738 setimes = targisdir = 0;
739 mask = umask(0);
740 if (!pflag)
741 (void) umask(mask);
742 if (argc != 1) {
743 run_err("ambiguous target");
744 exit(1);
745 }
746 targ = *argv;
747 if (targetshouldbedirectory)
748 verifydir(targ);
749
750 (void) atomicio(vwrite, remout, "", 1);
751 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
752 targisdir = 1;
753 for (first = 1;; first = 0) {
754 cp = buf;
755 if (atomicio(read, remin, cp, 1) != 1)
756 return;
757 if (*cp++ == '\n')
758 SCREWUP("unexpected <newline>");
759 do {
760 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
761 SCREWUP("lost connection");
762 *cp++ = ch;
763 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
764 *cp = 0;
765 if (verbose_mode)
766 fprintf(stderr, "Sink: %s", buf);
767
768 if (buf[0] == '\01' || buf[0] == '\02') {
769 if (iamremote == 0)
770 (void) atomicio(vwrite, STDERR_FILENO,
771 buf + 1, strlen(buf + 1));
772 if (buf[0] == '\02')
773 exit(1);
774 ++errs;
775 continue;
776 }
777 if (buf[0] == 'E') {
778 (void) atomicio(vwrite, remout, "", 1);
779 return;
780 }
781 if (ch == '\n')
782 *--cp = 0;
783
784 cp = buf;
785 if (*cp == 'T') {
786 setimes++;
787 cp++;
788 mtime.tv_sec = strtol(cp, &cp, 10);
789 if (!cp || *cp++ != ' ')
790 SCREWUP("mtime.sec not delimited");
791 mtime.tv_usec = strtol(cp, &cp, 10);
792 if (!cp || *cp++ != ' ')
793 SCREWUP("mtime.usec not delimited");
794 atime.tv_sec = strtol(cp, &cp, 10);
795 if (!cp || *cp++ != ' ')
796 SCREWUP("atime.sec not delimited");
797 atime.tv_usec = strtol(cp, &cp, 10);
798 if (!cp || *cp++ != '\0')
799 SCREWUP("atime.usec not delimited");
800 (void) atomicio(vwrite, remout, "", 1);
801 continue;
802 }
803 if (*cp != 'C' && *cp != 'D') {
804 /*
805 * Check for the case "rcp remote:foo\* local:bar".
806 * In this case, the line "No match." can be returned
807 * by the shell before the rcp command on the remote is
808 * executed so the ^Aerror_message convention isn't
809 * followed.
810 */
811 if (first) {
812 run_err("%s", cp);
813 exit(1);
814 }
815 SCREWUP("expected control record");
816 }
817 mode = 0;
818 for (++cp; cp < buf + 5; cp++) {
819 if (*cp < '0' || *cp > '7')
820 SCREWUP("bad mode");
821 mode = (mode << 3) | (*cp - '0');
822 }
823 if (*cp++ != ' ')
824 SCREWUP("mode not delimited");
825
826 for (size = 0; isdigit(*cp);)
827 size = size * 10 + (*cp++ - '0');
828 if (*cp++ != ' ')
829 SCREWUP("size not delimited");
830 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
831 run_err("error: unexpected filename: %s", cp);
832 exit(1);
833 }
834 if (targisdir) {
835 static char *namebuf;
836 static int cursize;
837 size_t need;
838
839 need = strlen(targ) + strlen(cp) + 250;
840 if (need > cursize) {
841 if (namebuf)
842 xfree(namebuf);
843 namebuf = xmalloc(need);
844 cursize = need;
845 }
846 (void) snprintf(namebuf, need, "%s%s%s", targ,
847 strcmp(targ, "/") ? "/" : "", cp);
848 np = namebuf;
849 } else
850 np = targ;
851 curfile = cp;
852 exists = stat(np, &stb) == 0;
853 if (buf[0] == 'D') {
854 int mod_flag = pflag;
855 if (!iamrecursive)
856 SCREWUP("received directory without -r");
857 if (exists) {
858 if (!S_ISDIR(stb.st_mode)) {
859 errno = ENOTDIR;
860 goto bad;
861 }
862 if (pflag)
863 (void) chmod(np, mode);
864 } else {
865 /* Handle copying from a read-only
866 directory */
867 mod_flag = 1;
868 if (mkdir(np, mode | S_IRWXU) < 0)
869 goto bad;
870 }
871 vect[0] = xstrdup(np);
872 sink(1, vect);
873 if (setimes) {
874 setimes = 0;
875 if (utimes(vect[0], tv) < 0)
876 run_err("%s: set times: %s",
877 vect[0], strerror(errno));
878 }
879 if (mod_flag)
880 (void) chmod(vect[0], mode);
881 if (vect[0])
882 xfree(vect[0]);
883 continue;
884 }
885 omode = mode;
886 mode |= S_IWRITE;
887 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
888bad: run_err("%s: %s", np, strerror(errno));
889 continue;
890 }
891 (void) atomicio(vwrite, remout, "", 1);
892 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
893 (void) close(ofd);
894 continue;
895 }
896 cp = bp->buf;
897 wrerr = NO;
898
899 statbytes = 0;
900 if (showprogress)
901 start_progress_meter(curfile, size, &statbytes);
902 for (count = i = 0; i < size; i += 4096) {
903 amt = 4096;
904 if (i + amt > size)
905 amt = size - i;
906 count += amt;
907 do {
908 j = atomicio(read, remin, cp, amt);
909 if (j == 0) {
910 run_err("%s", j ? strerror(errno) :
911 "dropped connection");
912 exit(1);
913 }
914 amt -= j;
915 cp += j;
916 statbytes += j;
917 } while (amt > 0);
918
919 if (limit_rate)
920 bwlimit(4096);
921
922 if (count == bp->cnt) {
923 /* Keep reading so we stay sync'd up. */
924 if (wrerr == NO) {
925 if (atomicio(vwrite, ofd, bp->buf,
926 count) != count) {
927 wrerr = YES;
928 wrerrno = errno;
929 }
930 }
931 count = 0;
932 cp = bp->buf;
933 }
934 }
935 if (showprogress)
936 stop_progress_meter();
937 if (count != 0 && wrerr == NO &&
938 atomicio(vwrite, ofd, bp->buf, count) != count) {
939 wrerr = YES;
940 wrerrno = errno;
941 }
942 if (wrerr == NO && ftruncate(ofd, size) != 0) {
943 run_err("%s: truncate: %s", np, strerror(errno));
944 wrerr = DISPLAYED;
945 }
946 if (pflag) {
947 if (exists || omode != mode)
948#ifdef HAVE_FCHMOD
949 if (fchmod(ofd, omode)) {
950#else /* HAVE_FCHMOD */
951 if (chmod(np, omode)) {
952#endif /* HAVE_FCHMOD */
953 run_err("%s: set mode: %s",
954 np, strerror(errno));
955 wrerr = DISPLAYED;
956 }
957 } else {
958 if (!exists && omode != mode)
959#ifdef HAVE_FCHMOD
960 if (fchmod(ofd, omode & ~mask)) {
961#else /* HAVE_FCHMOD */
962 if (chmod(np, omode & ~mask)) {
963#endif /* HAVE_FCHMOD */
964 run_err("%s: set mode: %s",
965 np, strerror(errno));
966 wrerr = DISPLAYED;
967 }
968 }
969 if (close(ofd) == -1) {
970 wrerr = YES;
971 wrerrno = errno;
972 }
973 (void) response();
974 if (setimes && wrerr == NO) {
975 setimes = 0;
976 if (utimes(np, tv) < 0) {
977 run_err("%s: set times: %s",
978 np, strerror(errno));
979 wrerr = DISPLAYED;
980 }
981 }
982 switch (wrerr) {
983 case YES:
984 run_err("%s: %s", np, strerror(wrerrno));
985 break;
986 case NO:
987 (void) atomicio(vwrite, remout, "", 1);
988 break;
989 case DISPLAYED:
990 break;
991 }
992 }
993screwup:
994 run_err("protocol error: %s", why);
995 exit(1);
996}
997
998int
999response(void)
1000{
1001 char ch, *cp, resp, rbuf[2048];
1002
1003 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1004 lostconn(0);
1005
1006 cp = rbuf;
1007 switch (resp) {
1008 case 0: /* ok */
1009 return (0);
1010 default:
1011 *cp++ = resp;
1012 /* FALLTHROUGH */
1013 case 1: /* error, followed by error msg */
1014 case 2: /* fatal error, "" */
1015 do {
1016 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1017 lostconn(0);
1018 *cp++ = ch;
1019 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1020
1021 if (!iamremote)
1022 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1023 ++errs;
1024 if (resp == 1)
1025 return (-1);
1026 exit(1);
1027 }
1028 /* NOTREACHED */
1029}
1030
1031void
1032usage(void)
1033{
1034 (void) fprintf(stderr,
1035 "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1036 " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1037 " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1038 exit(1);
1039}
1040
1041void
1042run_err(const char *fmt,...)
1043{
1044 static FILE *fp;
1045 va_list ap;
1046
1047 ++errs;
1048 if (fp == NULL && !(fp = fdopen(remout, "w")))
1049 return;
1050 (void) fprintf(fp, "%c", 0x01);
1051 (void) fprintf(fp, "scp: ");
1052 va_start(ap, fmt);
1053 (void) vfprintf(fp, fmt, ap);
1054 va_end(ap);
1055 (void) fprintf(fp, "\n");
1056 (void) fflush(fp);
1057
1058 if (!iamremote) {
1059 va_start(ap, fmt);
1060 vfprintf(stderr, fmt, ap);
1061 va_end(ap);
1062 fprintf(stderr, "\n");
1063 }
1064}
1065
1066void
1067verifydir(char *cp)
1068{
1069 struct stat stb;
1070
1071 if (!stat(cp, &stb)) {
1072 if (S_ISDIR(stb.st_mode))
1073 return;
1074 errno = ENOTDIR;
1075 }
1076 run_err("%s: %s", cp, strerror(errno));
1077 killchild(0);
1078}
1079
1080int
1081okname(char *cp0)
1082{
1083 int c;
1084 char *cp;
1085
1086 cp = cp0;
1087 do {
1088 c = (int)*cp;
1089 if (c & 0200)
1090 goto bad;
1091 if (!isalpha(c) && !isdigit(c)) {
1092 switch (c) {
1093 case '\'':
1094 case '"':
1095 case '`':
1096 case ' ':
1097 case '#':
1098 goto bad;
1099 default:
1100 break;
1101 }
1102 }
1103 } while (*++cp);
1104 return (1);
1105
1106bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1107 return (0);
1108}
1109
1110BUF *
1111allocbuf(BUF *bp, int fd, int blksize)
1112{
1113 size_t size;
1114#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1115 struct stat stb;
1116
1117 if (fstat(fd, &stb) < 0) {
1118 run_err("fstat: %s", strerror(errno));
1119 return (0);
1120 }
1121 size = roundup(stb.st_blksize, blksize);
1122 if (size == 0)
1123 size = blksize;
1124#else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1125 size = blksize;
1126#endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1127 if (bp->cnt >= size)
1128 return (bp);
1129 if (bp->buf == NULL)
1130 bp->buf = xmalloc(size);
1131 else
1132 bp->buf = xrealloc(bp->buf, size);
1133 memset(bp->buf, 0, size);
1134 bp->cnt = size;
1135 return (bp);
1136}
1137
1138void
1139lostconn(int signo)
1140{
1141 if (!iamremote)
1142 write(STDERR_FILENO, "lost connection\n", 16);
1143 if (signo)
1144 _exit(1);
1145 else
1146 exit(1);
1147}
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