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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" | |
74 | RCSID("$OpenBSD: scp.c,v 1.135 2006/02/22 00:04:44 stevesk Exp $"); | |
75 | ||
76 | #include <sys/types.h> | |
77 | #ifdef HAVE_SYS_STAT_H | |
78 | # include <sys/stat.h> | |
79 | #endif | |
80 | #include <sys/wait.h> | |
81 | ||
82 | #include <ctype.h> | |
83 | #include <dirent.h> | |
84 | #include <signal.h> | |
85 | ||
86 | #include "xmalloc.h" | |
87 | #include "atomicio.h" | |
88 | #include "pathnames.h" | |
89 | #include "log.h" | |
90 | #include "misc.h" | |
91 | #include "progressmeter.h" | |
92 | ||
93 | extern char *__progname; | |
94 | ||
95 | void bwlimit(int); | |
96 | ||
97 | /* Struct for addargs */ | |
98 | arglist args; | |
99 | ||
100 | /* Bandwidth limit */ | |
101 | off_t limit_rate = 0; | |
102 | ||
103 | /* Name of current file being transferred. */ | |
104 | char *curfile; | |
105 | ||
106 | /* This is set to non-zero to enable verbose mode. */ | |
107 | int verbose_mode = 0; | |
108 | ||
109 | /* This is set to zero if the progressmeter is not desired. */ | |
110 | int showprogress = 1; | |
111 | ||
112 | /* This is the program to execute for the secured connection. ("ssh" or -S) */ | |
113 | char *ssh_program = _PATH_SSH_PROGRAM; | |
114 | ||
115 | /* This is used to store the pid of ssh_program */ | |
116 | pid_t do_cmd_pid = -1; | |
117 | ||
118 | static void | |
119 | killchild(int signo) | |
120 | { | |
121 | if (do_cmd_pid > 1) { | |
122 | kill(do_cmd_pid, signo ? signo : SIGTERM); | |
123 | waitpid(do_cmd_pid, NULL, 0); | |
124 | } | |
125 | ||
126 | if (signo) | |
127 | _exit(1); | |
128 | exit(1); | |
129 | } | |
130 | ||
131 | static int | |
132 | do_local_cmd(arglist *a) | |
133 | { | |
134 | u_int i; | |
135 | int status; | |
136 | pid_t pid; | |
137 | ||
138 | if (a->num == 0) | |
139 | fatal("do_local_cmd: no arguments"); | |
140 | ||
141 | if (verbose_mode) { | |
142 | fprintf(stderr, "Executing:"); | |
143 | for (i = 0; i < a->num; i++) | |
144 | fprintf(stderr, " %s", a->list[i]); | |
145 | fprintf(stderr, "\n"); | |
146 | } | |
147 | if ((pid = fork()) == -1) | |
148 | fatal("do_local_cmd: fork: %s", strerror(errno)); | |
149 | ||
150 | if (pid == 0) { | |
151 | execvp(a->list[0], a->list); | |
152 | perror(a->list[0]); | |
153 | exit(1); | |
154 | } | |
155 | ||
156 | do_cmd_pid = pid; | |
157 | signal(SIGTERM, killchild); | |
158 | signal(SIGINT, killchild); | |
159 | signal(SIGHUP, killchild); | |
160 | ||
161 | while (waitpid(pid, &status, 0) == -1) | |
162 | if (errno != EINTR) | |
163 | fatal("do_local_cmd: waitpid: %s", strerror(errno)); | |
164 | ||
165 | do_cmd_pid = -1; | |
166 | ||
167 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) | |
168 | return (-1); | |
169 | ||
170 | return (0); | |
171 | } | |
172 | ||
173 | /* | |
174 | * This function executes the given command as the specified user on the | |
175 | * given host. This returns < 0 if execution fails, and >= 0 otherwise. This | |
176 | * assigns the input and output file descriptors on success. | |
177 | */ | |
178 | ||
179 | int | |
180 | do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc) | |
181 | { | |
182 | int pin[2], pout[2], reserved[2]; | |
183 | ||
184 | if (verbose_mode) | |
185 | fprintf(stderr, | |
186 | "Executing: program %s host %s, user %s, command %s\n", | |
187 | ssh_program, host, | |
188 | remuser ? remuser : "(unspecified)", cmd); | |
189 | ||
190 | /* | |
191 | * Reserve two descriptors so that the real pipes won't get | |
192 | * descriptors 0 and 1 because that will screw up dup2 below. | |
193 | */ | |
194 | pipe(reserved); | |
195 | ||
196 | /* Create a socket pair for communicating with ssh. */ | |
197 | if (pipe(pin) < 0) | |
198 | fatal("pipe: %s", strerror(errno)); | |
199 | if (pipe(pout) < 0) | |
200 | fatal("pipe: %s", strerror(errno)); | |
201 | ||
202 | /* Free the reserved descriptors. */ | |
203 | close(reserved[0]); | |
204 | close(reserved[1]); | |
205 | ||
206 | /* Fork a child to execute the command on the remote host using ssh. */ | |
207 | do_cmd_pid = fork(); | |
208 | if (do_cmd_pid == 0) { | |
209 | /* Child. */ | |
210 | close(pin[1]); | |
211 | close(pout[0]); | |
212 | dup2(pin[0], 0); | |
213 | dup2(pout[1], 1); | |
214 | close(pin[0]); | |
215 | close(pout[1]); | |
216 | ||
217 | replacearg(&args, 0, "%s", ssh_program); | |
218 | if (remuser != NULL) | |
219 | addargs(&args, "-l%s", remuser); | |
220 | addargs(&args, "%s", host); | |
221 | addargs(&args, "%s", cmd); | |
222 | ||
223 | execvp(ssh_program, args.list); | |
224 | perror(ssh_program); | |
225 | exit(1); | |
226 | } else if (do_cmd_pid == -1) { | |
227 | fatal("fork: %s", strerror(errno)); | |
228 | } | |
229 | /* Parent. Close the other side, and return the local side. */ | |
230 | close(pin[0]); | |
231 | *fdout = pin[1]; | |
232 | close(pout[1]); | |
233 | *fdin = pout[0]; | |
234 | signal(SIGTERM, killchild); | |
235 | signal(SIGINT, killchild); | |
236 | signal(SIGHUP, killchild); | |
237 | return 0; | |
238 | } | |
239 | ||
240 | typedef struct { | |
241 | size_t cnt; | |
242 | char *buf; | |
243 | } BUF; | |
244 | ||
245 | BUF *allocbuf(BUF *, int, int); | |
246 | void lostconn(int); | |
247 | void nospace(void); | |
248 | int okname(char *); | |
249 | void run_err(const char *,...); | |
250 | void verifydir(char *); | |
251 | ||
252 | struct passwd *pwd; | |
253 | uid_t userid; | |
254 | int errs, remin, remout; | |
255 | int pflag, iamremote, iamrecursive, targetshouldbedirectory; | |
256 | ||
257 | #define CMDNEEDS 64 | |
258 | char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ | |
259 | ||
260 | int response(void); | |
261 | void rsource(char *, struct stat *); | |
262 | void sink(int, char *[]); | |
263 | void source(int, char *[]); | |
264 | void tolocal(int, char *[]); | |
265 | void toremote(char *, int, char *[]); | |
266 | void usage(void); | |
267 | ||
268 | int | |
269 | main(int argc, char **argv) | |
270 | { | |
271 | int ch, fflag, tflag, status; | |
272 | double speed; | |
273 | char *targ, *endp; | |
274 | extern char *optarg; | |
275 | extern int optind; | |
276 | ||
277 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ | |
278 | sanitise_stdfd(); | |
279 | ||
280 | __progname = ssh_get_progname(argv[0]); | |
281 | ||
282 | memset(&args, '\0', sizeof(args)); | |
283 | args.list = NULL; | |
284 | addargs(&args, "%s", ssh_program); | |
285 | addargs(&args, "-x"); | |
286 | addargs(&args, "-oForwardAgent no"); | |
287 | addargs(&args, "-oPermitLocalCommand no"); | |
288 | addargs(&args, "-oClearAllForwardings yes"); | |
289 | ||
290 | fflag = tflag = 0; | |
291 | while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1) | |
292 | switch (ch) { | |
293 | /* User-visible flags. */ | |
294 | case '1': | |
295 | case '2': | |
296 | case '4': | |
297 | case '6': | |
298 | case 'C': | |
299 | addargs(&args, "-%c", ch); | |
300 | break; | |
301 | case 'o': | |
302 | case 'c': | |
303 | case 'i': | |
304 | case 'F': | |
305 | addargs(&args, "-%c%s", ch, optarg); | |
306 | break; | |
307 | case 'P': | |
308 | addargs(&args, "-p%s", optarg); | |
309 | break; | |
310 | case 'B': | |
311 | addargs(&args, "-oBatchmode yes"); | |
312 | break; | |
313 | case 'l': | |
314 | speed = strtod(optarg, &endp); | |
315 | if (speed <= 0 || *endp != '\0') | |
316 | usage(); | |
317 | limit_rate = speed * 1024; | |
318 | break; | |
319 | case 'p': | |
320 | pflag = 1; | |
321 | break; | |
322 | case 'r': | |
323 | iamrecursive = 1; | |
324 | break; | |
325 | case 'S': | |
326 | ssh_program = xstrdup(optarg); | |
327 | break; | |
328 | case 'v': | |
329 | addargs(&args, "-v"); | |
330 | verbose_mode = 1; | |
331 | break; | |
332 | case 'q': | |
333 | addargs(&args, "-q"); | |
334 | showprogress = 0; | |
335 | break; | |
336 | ||
337 | /* Server options. */ | |
338 | case 'd': | |
339 | targetshouldbedirectory = 1; | |
340 | break; | |
341 | case 'f': /* "from" */ | |
342 | iamremote = 1; | |
343 | fflag = 1; | |
344 | break; | |
345 | case 't': /* "to" */ | |
346 | iamremote = 1; | |
347 | tflag = 1; | |
348 | #ifdef HAVE_CYGWIN | |
349 | setmode(0, O_BINARY); | |
350 | #endif | |
351 | break; | |
352 | default: | |
353 | usage(); | |
354 | } | |
355 | argc -= optind; | |
356 | argv += optind; | |
357 | ||
358 | if ((pwd = getpwuid(userid = getuid())) == NULL) | |
359 | fatal("unknown user %u", (u_int) userid); | |
360 | ||
361 | if (!isatty(STDERR_FILENO)) | |
362 | showprogress = 0; | |
363 | ||
364 | remin = STDIN_FILENO; | |
365 | remout = STDOUT_FILENO; | |
366 | ||
367 | if (fflag) { | |
368 | /* Follow "protocol", send data. */ | |
369 | (void) response(); | |
370 | source(argc, argv); | |
371 | exit(errs != 0); | |
372 | } | |
373 | if (tflag) { | |
374 | /* Receive data. */ | |
375 | sink(argc, argv); | |
376 | exit(errs != 0); | |
377 | } | |
378 | if (argc < 2) | |
379 | usage(); | |
380 | if (argc > 2) | |
381 | targetshouldbedirectory = 1; | |
382 | ||
383 | remin = remout = -1; | |
384 | do_cmd_pid = -1; | |
385 | /* Command to be executed on remote system using "ssh". */ | |
386 | (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", | |
387 | verbose_mode ? " -v" : "", | |
388 | iamrecursive ? " -r" : "", pflag ? " -p" : "", | |
389 | targetshouldbedirectory ? " -d" : ""); | |
390 | ||
391 | (void) signal(SIGPIPE, lostconn); | |
392 | ||
393 | if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ | |
394 | toremote(targ, argc, argv); | |
395 | else { | |
396 | if (targetshouldbedirectory) | |
397 | verifydir(argv[argc - 1]); | |
398 | tolocal(argc, argv); /* Dest is local host. */ | |
399 | } | |
400 | /* | |
401 | * Finally check the exit status of the ssh process, if one was forked | |
402 | * and no error has occured yet | |
403 | */ | |
404 | if (do_cmd_pid != -1 && errs == 0) { | |
405 | if (remin != -1) | |
406 | (void) close(remin); | |
407 | if (remout != -1) | |
408 | (void) close(remout); | |
409 | if (waitpid(do_cmd_pid, &status, 0) == -1) | |
410 | errs = 1; | |
411 | else { | |
412 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) | |
413 | errs = 1; | |
414 | } | |
415 | } | |
416 | exit(errs != 0); | |
417 | } | |
418 | ||
419 | void | |
420 | toremote(char *targ, int argc, char **argv) | |
421 | { | |
422 | int i, len; | |
423 | char *bp, *host, *src, *suser, *thost, *tuser, *arg; | |
424 | arglist alist; | |
425 | ||
426 | memset(&alist, '\0', sizeof(alist)); | |
427 | alist.list = NULL; | |
428 | ||
429 | *targ++ = 0; | |
430 | if (*targ == 0) | |
431 | targ = "."; | |
432 | ||
433 | arg = xstrdup(argv[argc - 1]); | |
434 | if ((thost = strrchr(arg, '@'))) { | |
435 | /* user@host */ | |
436 | *thost++ = 0; | |
437 | tuser = arg; | |
438 | if (*tuser == '\0') | |
439 | tuser = NULL; | |
440 | } else { | |
441 | thost = arg; | |
442 | tuser = NULL; | |
443 | } | |
444 | ||
445 | if (tuser != NULL && !okname(tuser)) { | |
446 | xfree(arg); | |
447 | return; | |
448 | } | |
449 | ||
450 | for (i = 0; i < argc - 1; i++) { | |
451 | src = colon(argv[i]); | |
452 | if (src) { /* remote to remote */ | |
453 | freeargs(&alist); | |
454 | addargs(&alist, "%s", ssh_program); | |
455 | if (verbose_mode) | |
456 | addargs(&alist, "-v"); | |
457 | addargs(&alist, "-x"); | |
458 | addargs(&alist, "-oClearAllForwardings yes"); | |
459 | addargs(&alist, "-n"); | |
460 | ||
461 | *src++ = 0; | |
462 | if (*src == 0) | |
463 | src = "."; | |
464 | host = strrchr(argv[i], '@'); | |
465 | ||
466 | if (host) { | |
467 | *host++ = 0; | |
468 | host = cleanhostname(host); | |
469 | suser = argv[i]; | |
470 | if (*suser == '\0') | |
471 | suser = pwd->pw_name; | |
472 | else if (!okname(suser)) | |
473 | continue; | |
474 | addargs(&alist, "-l"); | |
475 | addargs(&alist, "%s", suser); | |
476 | } else { | |
477 | host = cleanhostname(argv[i]); | |
478 | } | |
479 | addargs(&alist, "%s", host); | |
480 | addargs(&alist, "%s", cmd); | |
481 | addargs(&alist, "%s", src); | |
482 | addargs(&alist, "%s%s%s:%s", | |
483 | tuser ? tuser : "", tuser ? "@" : "", | |
484 | thost, targ); | |
485 | if (do_local_cmd(&alist) != 0) | |
486 | errs = 1; | |
487 | } else { /* local to remote */ | |
488 | if (remin == -1) { | |
489 | len = strlen(targ) + CMDNEEDS + 20; | |
490 | bp = xmalloc(len); | |
491 | (void) snprintf(bp, len, "%s -t %s", cmd, targ); | |
492 | host = cleanhostname(thost); | |
493 | if (do_cmd(host, tuser, bp, &remin, | |
494 | &remout, argc) < 0) | |
495 | exit(1); | |
496 | if (response() < 0) | |
497 | exit(1); | |
498 | (void) xfree(bp); | |
499 | } | |
500 | source(1, argv + i); | |
501 | } | |
502 | } | |
503 | } | |
504 | ||
505 | void | |
506 | tolocal(int argc, char **argv) | |
507 | { | |
508 | int i, len; | |
509 | char *bp, *host, *src, *suser; | |
510 | arglist alist; | |
511 | ||
512 | memset(&alist, '\0', sizeof(alist)); | |
513 | alist.list = NULL; | |
514 | ||
515 | for (i = 0; i < argc - 1; i++) { | |
516 | if (!(src = colon(argv[i]))) { /* Local to local. */ | |
517 | freeargs(&alist); | |
518 | addargs(&alist, "%s", _PATH_CP); | |
519 | if (iamrecursive) | |
520 | addargs(&alist, "-r"); | |
521 | if (pflag) | |
522 | addargs(&alist, "-p"); | |
523 | addargs(&alist, "%s", argv[i]); | |
524 | addargs(&alist, "%s", argv[argc-1]); | |
525 | if (do_local_cmd(&alist)) | |
526 | ++errs; | |
527 | continue; | |
528 | } | |
529 | *src++ = 0; | |
530 | if (*src == 0) | |
531 | src = "."; | |
532 | if ((host = strrchr(argv[i], '@')) == NULL) { | |
533 | host = argv[i]; | |
534 | suser = NULL; | |
535 | } else { | |
536 | *host++ = 0; | |
537 | suser = argv[i]; | |
538 | if (*suser == '\0') | |
539 | suser = pwd->pw_name; | |
540 | } | |
541 | host = cleanhostname(host); | |
542 | len = strlen(src) + CMDNEEDS + 20; | |
543 | bp = xmalloc(len); | |
544 | (void) snprintf(bp, len, "%s -f %s", cmd, src); | |
545 | if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) { | |
546 | (void) xfree(bp); | |
547 | ++errs; | |
548 | continue; | |
549 | } | |
550 | xfree(bp); | |
551 | sink(1, argv + argc - 1); | |
552 | (void) close(remin); | |
553 | remin = remout = -1; | |
554 | } | |
555 | } | |
556 | ||
557 | void | |
558 | source(int argc, char **argv) | |
559 | { | |
560 | struct stat stb; | |
561 | static BUF buffer; | |
562 | BUF *bp; | |
563 | off_t i, amt, statbytes; | |
564 | size_t result; | |
565 | int fd = -1, haderr, indx; | |
566 | char *last, *name, buf[2048]; | |
567 | int len; | |
568 | ||
569 | for (indx = 0; indx < argc; ++indx) { | |
570 | name = argv[indx]; | |
571 | statbytes = 0; | |
572 | len = strlen(name); | |
573 | while (len > 1 && name[len-1] == '/') | |
574 | name[--len] = '\0'; | |
575 | if (strchr(name, '\n') != NULL) { | |
576 | run_err("%s: skipping, filename contains a newline", | |
577 | name); | |
578 | goto next; | |
579 | } | |
580 | if ((fd = open(name, O_RDONLY, 0)) < 0) | |
581 | goto syserr; | |
582 | if (fstat(fd, &stb) < 0) { | |
583 | syserr: run_err("%s: %s", name, strerror(errno)); | |
584 | goto next; | |
585 | } | |
586 | switch (stb.st_mode & S_IFMT) { | |
587 | case S_IFREG: | |
588 | break; | |
589 | case S_IFDIR: | |
590 | if (iamrecursive) { | |
591 | rsource(name, &stb); | |
592 | goto next; | |
593 | } | |
594 | /* FALLTHROUGH */ | |
595 | default: | |
596 | run_err("%s: not a regular file", name); | |
597 | goto next; | |
598 | } | |
599 | if ((last = strrchr(name, '/')) == NULL) | |
600 | last = name; | |
601 | else | |
602 | ++last; | |
603 | curfile = last; | |
604 | if (pflag) { | |
605 | /* | |
606 | * Make it compatible with possible future | |
607 | * versions expecting microseconds. | |
608 | */ | |
609 | (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", | |
610 | (u_long) stb.st_mtime, | |
611 | (u_long) stb.st_atime); | |
612 | (void) atomicio(vwrite, remout, buf, strlen(buf)); | |
613 | if (response() < 0) | |
614 | goto next; | |
615 | } | |
616 | #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) | |
617 | snprintf(buf, sizeof buf, "C%04o %lld %s\n", | |
618 | (u_int) (stb.st_mode & FILEMODEMASK), | |
619 | (long long)stb.st_size, last); | |
620 | if (verbose_mode) { | |
621 | fprintf(stderr, "Sending file modes: %s", buf); | |
622 | } | |
623 | (void) atomicio(vwrite, remout, buf, strlen(buf)); | |
624 | if (response() < 0) | |
625 | goto next; | |
626 | if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { | |
627 | next: if (fd != -1) { | |
628 | (void) close(fd); | |
629 | fd = -1; | |
630 | } | |
631 | continue; | |
632 | } | |
633 | if (showprogress) | |
634 | start_progress_meter(curfile, stb.st_size, &statbytes); | |
635 | /* Keep writing after an error so that we stay sync'd up. */ | |
636 | for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { | |
637 | amt = bp->cnt; | |
638 | if (i + amt > stb.st_size) | |
639 | amt = stb.st_size - i; | |
640 | if (!haderr) { | |
641 | result = atomicio(read, fd, bp->buf, amt); | |
642 | if (result != amt) | |
643 | haderr = errno; | |
644 | } | |
645 | if (haderr) | |
646 | (void) atomicio(vwrite, remout, bp->buf, amt); | |
647 | else { | |
648 | result = atomicio(vwrite, remout, bp->buf, amt); | |
649 | if (result != amt) | |
650 | haderr = errno; | |
651 | statbytes += result; | |
652 | } | |
653 | if (limit_rate) | |
654 | bwlimit(amt); | |
655 | } | |
656 | if (showprogress) | |
657 | stop_progress_meter(); | |
658 | ||
659 | if (fd != -1) { | |
660 | if (close(fd) < 0 && !haderr) | |
661 | haderr = errno; | |
662 | fd = -1; | |
663 | } | |
664 | if (!haderr) | |
665 | (void) atomicio(vwrite, remout, "", 1); | |
666 | else | |
667 | run_err("%s: %s", name, strerror(haderr)); | |
668 | (void) response(); | |
669 | } | |
670 | } | |
671 | ||
672 | void | |
673 | rsource(char *name, struct stat *statp) | |
674 | { | |
675 | DIR *dirp; | |
676 | struct dirent *dp; | |
677 | char *last, *vect[1], path[1100]; | |
678 | ||
679 | if (!(dirp = opendir(name))) { | |
680 | run_err("%s: %s", name, strerror(errno)); | |
681 | return; | |
682 | } | |
683 | last = strrchr(name, '/'); | |
684 | if (last == 0) | |
685 | last = name; | |
686 | else | |
687 | last++; | |
688 | if (pflag) { | |
689 | (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", | |
690 | (u_long) statp->st_mtime, | |
691 | (u_long) statp->st_atime); | |
692 | (void) atomicio(vwrite, remout, path, strlen(path)); | |
693 | if (response() < 0) { | |
694 | closedir(dirp); | |
695 | return; | |
696 | } | |
697 | } | |
698 | (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", | |
699 | (u_int) (statp->st_mode & FILEMODEMASK), 0, last); | |
700 | if (verbose_mode) | |
701 | fprintf(stderr, "Entering directory: %s", path); | |
702 | (void) atomicio(vwrite, remout, path, strlen(path)); | |
703 | if (response() < 0) { | |
704 | closedir(dirp); | |
705 | return; | |
706 | } | |
707 | while ((dp = readdir(dirp)) != NULL) { | |
708 | if (dp->d_ino == 0) | |
709 | continue; | |
710 | if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) | |
711 | continue; | |
712 | if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { | |
713 | run_err("%s/%s: name too long", name, dp->d_name); | |
714 | continue; | |
715 | } | |
716 | (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); | |
717 | vect[0] = path; | |
718 | source(1, vect); | |
719 | } | |
720 | (void) closedir(dirp); | |
721 | (void) atomicio(vwrite, remout, "E\n", 2); | |
722 | (void) response(); | |
723 | } | |
724 | ||
725 | void | |
726 | bwlimit(int amount) | |
727 | { | |
728 | static struct timeval bwstart, bwend; | |
729 | static int lamt, thresh = 16384; | |
730 | u_int64_t waitlen; | |
731 | struct timespec ts, rm; | |
732 | ||
733 | if (!timerisset(&bwstart)) { | |
734 | gettimeofday(&bwstart, NULL); | |
735 | return; | |
736 | } | |
737 | ||
738 | lamt += amount; | |
739 | if (lamt < thresh) | |
740 | return; | |
741 | ||
742 | gettimeofday(&bwend, NULL); | |
743 | timersub(&bwend, &bwstart, &bwend); | |
744 | if (!timerisset(&bwend)) | |
745 | return; | |
746 | ||
747 | lamt *= 8; | |
748 | waitlen = (double)1000000L * lamt / limit_rate; | |
749 | ||
750 | bwstart.tv_sec = waitlen / 1000000L; | |
751 | bwstart.tv_usec = waitlen % 1000000L; | |
752 | ||
753 | if (timercmp(&bwstart, &bwend, >)) { | |
754 | timersub(&bwstart, &bwend, &bwend); | |
755 | ||
756 | /* Adjust the wait time */ | |
757 | if (bwend.tv_sec) { | |
758 | thresh /= 2; | |
759 | if (thresh < 2048) | |
760 | thresh = 2048; | |
761 | } else if (bwend.tv_usec < 100) { | |
762 | thresh *= 2; | |
763 | if (thresh > 32768) | |
764 | thresh = 32768; | |
765 | } | |
766 | ||
767 | TIMEVAL_TO_TIMESPEC(&bwend, &ts); | |
768 | while (nanosleep(&ts, &rm) == -1) { | |
769 | if (errno != EINTR) | |
770 | break; | |
771 | ts = rm; | |
772 | } | |
773 | } | |
774 | ||
775 | lamt = 0; | |
776 | gettimeofday(&bwstart, NULL); | |
777 | } | |
778 | ||
779 | void | |
780 | sink(int argc, char **argv) | |
781 | { | |
782 | static BUF buffer; | |
783 | struct stat stb; | |
784 | enum { | |
785 | YES, NO, DISPLAYED | |
786 | } wrerr; | |
787 | BUF *bp; | |
788 | off_t i; | |
789 | size_t j, count; | |
790 | int amt, exists, first, mask, mode, ofd, omode; | |
791 | off_t size, statbytes; | |
792 | int setimes, targisdir, wrerrno = 0; | |
793 | char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; | |
794 | struct timeval tv[2]; | |
795 | ||
796 | #define atime tv[0] | |
797 | #define mtime tv[1] | |
798 | #define SCREWUP(str) { why = str; goto screwup; } | |
799 | ||
800 | setimes = targisdir = 0; | |
801 | mask = umask(0); | |
802 | if (!pflag) | |
803 | (void) umask(mask); | |
804 | if (argc != 1) { | |
805 | run_err("ambiguous target"); | |
806 | exit(1); | |
807 | } | |
808 | targ = *argv; | |
809 | if (targetshouldbedirectory) | |
810 | verifydir(targ); | |
811 | ||
812 | (void) atomicio(vwrite, remout, "", 1); | |
813 | if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) | |
814 | targisdir = 1; | |
815 | for (first = 1;; first = 0) { | |
816 | cp = buf; | |
817 | if (atomicio(read, remin, cp, 1) != 1) | |
818 | return; | |
819 | if (*cp++ == '\n') | |
820 | SCREWUP("unexpected <newline>"); | |
821 | do { | |
822 | if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) | |
823 | SCREWUP("lost connection"); | |
824 | *cp++ = ch; | |
825 | } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); | |
826 | *cp = 0; | |
827 | if (verbose_mode) | |
828 | fprintf(stderr, "Sink: %s", buf); | |
829 | ||
830 | if (buf[0] == '\01' || buf[0] == '\02') { | |
831 | if (iamremote == 0) | |
832 | (void) atomicio(vwrite, STDERR_FILENO, | |
833 | buf + 1, strlen(buf + 1)); | |
834 | if (buf[0] == '\02') | |
835 | exit(1); | |
836 | ++errs; | |
837 | continue; | |
838 | } | |
839 | if (buf[0] == 'E') { | |
840 | (void) atomicio(vwrite, remout, "", 1); | |
841 | return; | |
842 | } | |
843 | if (ch == '\n') | |
844 | *--cp = 0; | |
845 | ||
846 | cp = buf; | |
847 | if (*cp == 'T') { | |
848 | setimes++; | |
849 | cp++; | |
850 | mtime.tv_sec = strtol(cp, &cp, 10); | |
851 | if (!cp || *cp++ != ' ') | |
852 | SCREWUP("mtime.sec not delimited"); | |
853 | mtime.tv_usec = strtol(cp, &cp, 10); | |
854 | if (!cp || *cp++ != ' ') | |
855 | SCREWUP("mtime.usec not delimited"); | |
856 | atime.tv_sec = strtol(cp, &cp, 10); | |
857 | if (!cp || *cp++ != ' ') | |
858 | SCREWUP("atime.sec not delimited"); | |
859 | atime.tv_usec = strtol(cp, &cp, 10); | |
860 | if (!cp || *cp++ != '\0') | |
861 | SCREWUP("atime.usec not delimited"); | |
862 | (void) atomicio(vwrite, remout, "", 1); | |
863 | continue; | |
864 | } | |
865 | if (*cp != 'C' && *cp != 'D') { | |
866 | /* | |
867 | * Check for the case "rcp remote:foo\* local:bar". | |
868 | * In this case, the line "No match." can be returned | |
869 | * by the shell before the rcp command on the remote is | |
870 | * executed so the ^Aerror_message convention isn't | |
871 | * followed. | |
872 | */ | |
873 | if (first) { | |
874 | run_err("%s", cp); | |
875 | exit(1); | |
876 | } | |
877 | SCREWUP("expected control record"); | |
878 | } | |
879 | mode = 0; | |
880 | for (++cp; cp < buf + 5; cp++) { | |
881 | if (*cp < '0' || *cp > '7') | |
882 | SCREWUP("bad mode"); | |
883 | mode = (mode << 3) | (*cp - '0'); | |
884 | } | |
885 | if (*cp++ != ' ') | |
886 | SCREWUP("mode not delimited"); | |
887 | ||
888 | for (size = 0; isdigit(*cp);) | |
889 | size = size * 10 + (*cp++ - '0'); | |
890 | if (*cp++ != ' ') | |
891 | SCREWUP("size not delimited"); | |
892 | if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { | |
893 | run_err("error: unexpected filename: %s", cp); | |
894 | exit(1); | |
895 | } | |
896 | if (targisdir) { | |
897 | static char *namebuf; | |
898 | static size_t cursize; | |
899 | size_t need; | |
900 | ||
901 | need = strlen(targ) + strlen(cp) + 250; | |
902 | if (need > cursize) { | |
903 | if (namebuf) | |
904 | xfree(namebuf); | |
905 | namebuf = xmalloc(need); | |
906 | cursize = need; | |
907 | } | |
908 | (void) snprintf(namebuf, need, "%s%s%s", targ, | |
909 | strcmp(targ, "/") ? "/" : "", cp); | |
910 | np = namebuf; | |
911 | } else | |
912 | np = targ; | |
913 | curfile = cp; | |
914 | exists = stat(np, &stb) == 0; | |
915 | if (buf[0] == 'D') { | |
916 | int mod_flag = pflag; | |
917 | if (!iamrecursive) | |
918 | SCREWUP("received directory without -r"); | |
919 | if (exists) { | |
920 | if (!S_ISDIR(stb.st_mode)) { | |
921 | errno = ENOTDIR; | |
922 | goto bad; | |
923 | } | |
924 | if (pflag) | |
925 | (void) chmod(np, mode); | |
926 | } else { | |
927 | /* Handle copying from a read-only | |
928 | directory */ | |
929 | mod_flag = 1; | |
930 | if (mkdir(np, mode | S_IRWXU) < 0) | |
931 | goto bad; | |
932 | } | |
933 | vect[0] = xstrdup(np); | |
934 | sink(1, vect); | |
935 | if (setimes) { | |
936 | setimes = 0; | |
937 | if (utimes(vect[0], tv) < 0) | |
938 | run_err("%s: set times: %s", | |
939 | vect[0], strerror(errno)); | |
940 | } | |
941 | if (mod_flag) | |
942 | (void) chmod(vect[0], mode); | |
943 | if (vect[0]) | |
944 | xfree(vect[0]); | |
945 | continue; | |
946 | } | |
947 | omode = mode; | |
948 | mode |= S_IWRITE; | |
949 | if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { | |
950 | bad: run_err("%s: %s", np, strerror(errno)); | |
951 | continue; | |
952 | } | |
953 | (void) atomicio(vwrite, remout, "", 1); | |
954 | if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) { | |
955 | (void) close(ofd); | |
956 | continue; | |
957 | } | |
958 | cp = bp->buf; | |
959 | wrerr = NO; | |
960 | ||
961 | statbytes = 0; | |
962 | if (showprogress) | |
963 | start_progress_meter(curfile, size, &statbytes); | |
964 | for (count = i = 0; i < size; i += 4096) { | |
965 | amt = 4096; | |
966 | if (i + amt > size) | |
967 | amt = size - i; | |
968 | count += amt; | |
969 | do { | |
970 | j = atomicio(read, remin, cp, amt); | |
971 | if (j == 0) { | |
972 | run_err("%s", j ? strerror(errno) : | |
973 | "dropped connection"); | |
974 | exit(1); | |
975 | } | |
976 | amt -= j; | |
977 | cp += j; | |
978 | statbytes += j; | |
979 | } while (amt > 0); | |
980 | ||
981 | if (limit_rate) | |
982 | bwlimit(4096); | |
983 | ||
984 | if (count == bp->cnt) { | |
985 | /* Keep reading so we stay sync'd up. */ | |
986 | if (wrerr == NO) { | |
987 | if (atomicio(vwrite, ofd, bp->buf, | |
988 | count) != count) { | |
989 | wrerr = YES; | |
990 | wrerrno = errno; | |
991 | } | |
992 | } | |
993 | count = 0; | |
994 | cp = bp->buf; | |
995 | } | |
996 | } | |
997 | if (showprogress) | |
998 | stop_progress_meter(); | |
999 | if (count != 0 && wrerr == NO && | |
1000 | atomicio(vwrite, ofd, bp->buf, count) != count) { | |
1001 | wrerr = YES; | |
1002 | wrerrno = errno; | |
1003 | } | |
1004 | if (wrerr == NO && ftruncate(ofd, size) != 0) { | |
1005 | run_err("%s: truncate: %s", np, strerror(errno)); | |
1006 | wrerr = DISPLAYED; | |
1007 | } | |
1008 | if (pflag) { | |
1009 | if (exists || omode != mode) | |
1010 | #ifdef HAVE_FCHMOD | |
1011 | if (fchmod(ofd, omode)) { | |
1012 | #else /* HAVE_FCHMOD */ | |
1013 | if (chmod(np, omode)) { | |
1014 | #endif /* HAVE_FCHMOD */ | |
1015 | run_err("%s: set mode: %s", | |
1016 | np, strerror(errno)); | |
1017 | wrerr = DISPLAYED; | |
1018 | } | |
1019 | } else { | |
1020 | if (!exists && omode != mode) | |
1021 | #ifdef HAVE_FCHMOD | |
1022 | if (fchmod(ofd, omode & ~mask)) { | |
1023 | #else /* HAVE_FCHMOD */ | |
1024 | if (chmod(np, omode & ~mask)) { | |
1025 | #endif /* HAVE_FCHMOD */ | |
1026 | run_err("%s: set mode: %s", | |
1027 | np, strerror(errno)); | |
1028 | wrerr = DISPLAYED; | |
1029 | } | |
1030 | } | |
1031 | if (close(ofd) == -1) { | |
1032 | wrerr = YES; | |
1033 | wrerrno = errno; | |
1034 | } | |
1035 | (void) response(); | |
1036 | if (setimes && wrerr == NO) { | |
1037 | setimes = 0; | |
1038 | if (utimes(np, tv) < 0) { | |
1039 | run_err("%s: set times: %s", | |
1040 | np, strerror(errno)); | |
1041 | wrerr = DISPLAYED; | |
1042 | } | |
1043 | } | |
1044 | switch (wrerr) { | |
1045 | case YES: | |
1046 | run_err("%s: %s", np, strerror(wrerrno)); | |
1047 | break; | |
1048 | case NO: | |
1049 | (void) atomicio(vwrite, remout, "", 1); | |
1050 | break; | |
1051 | case DISPLAYED: | |
1052 | break; | |
1053 | } | |
1054 | } | |
1055 | screwup: | |
1056 | run_err("protocol error: %s", why); | |
1057 | exit(1); | |
1058 | } | |
1059 | ||
1060 | int | |
1061 | response(void) | |
1062 | { | |
1063 | char ch, *cp, resp, rbuf[2048]; | |
1064 | ||
1065 | if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) | |
1066 | lostconn(0); | |
1067 | ||
1068 | cp = rbuf; | |
1069 | switch (resp) { | |
1070 | case 0: /* ok */ | |
1071 | return (0); | |
1072 | default: | |
1073 | *cp++ = resp; | |
1074 | /* FALLTHROUGH */ | |
1075 | case 1: /* error, followed by error msg */ | |
1076 | case 2: /* fatal error, "" */ | |
1077 | do { | |
1078 | if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) | |
1079 | lostconn(0); | |
1080 | *cp++ = ch; | |
1081 | } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); | |
1082 | ||
1083 | if (!iamremote) | |
1084 | (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); | |
1085 | ++errs; | |
1086 | if (resp == 1) | |
1087 | return (-1); | |
1088 | exit(1); | |
1089 | } | |
1090 | /* NOTREACHED */ | |
1091 | } | |
1092 | ||
1093 | void | |
1094 | usage(void) | |
1095 | { | |
1096 | (void) fprintf(stderr, | |
1097 | "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" | |
1098 | " [-l limit] [-o ssh_option] [-P port] [-S program]\n" | |
1099 | " [[user@]host1:]file1 [...] [[user@]host2:]file2\n"); | |
1100 | exit(1); | |
1101 | } | |
1102 | ||
1103 | void | |
1104 | run_err(const char *fmt,...) | |
1105 | { | |
1106 | static FILE *fp; | |
1107 | va_list ap; | |
1108 | ||
1109 | ++errs; | |
1110 | if (fp == NULL && !(fp = fdopen(remout, "w"))) | |
1111 | return; | |
1112 | (void) fprintf(fp, "%c", 0x01); | |
1113 | (void) fprintf(fp, "scp: "); | |
1114 | va_start(ap, fmt); | |
1115 | (void) vfprintf(fp, fmt, ap); | |
1116 | va_end(ap); | |
1117 | (void) fprintf(fp, "\n"); | |
1118 | (void) fflush(fp); | |
1119 | ||
1120 | if (!iamremote) { | |
1121 | va_start(ap, fmt); | |
1122 | vfprintf(stderr, fmt, ap); | |
1123 | va_end(ap); | |
1124 | fprintf(stderr, "\n"); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | void | |
1129 | verifydir(char *cp) | |
1130 | { | |
1131 | struct stat stb; | |
1132 | ||
1133 | if (!stat(cp, &stb)) { | |
1134 | if (S_ISDIR(stb.st_mode)) | |
1135 | return; | |
1136 | errno = ENOTDIR; | |
1137 | } | |
1138 | run_err("%s: %s", cp, strerror(errno)); | |
1139 | killchild(0); | |
1140 | } | |
1141 | ||
1142 | int | |
1143 | okname(char *cp0) | |
1144 | { | |
1145 | int c; | |
1146 | char *cp; | |
1147 | ||
1148 | cp = cp0; | |
1149 | do { | |
1150 | c = (int)*cp; | |
1151 | if (c & 0200) | |
1152 | goto bad; | |
1153 | if (!isalpha(c) && !isdigit(c)) { | |
1154 | switch (c) { | |
1155 | case '\'': | |
1156 | case '"': | |
1157 | case '`': | |
1158 | case ' ': | |
1159 | case '#': | |
1160 | goto bad; | |
1161 | default: | |
1162 | break; | |
1163 | } | |
1164 | } | |
1165 | } while (*++cp); | |
1166 | return (1); | |
1167 | ||
1168 | bad: fprintf(stderr, "%s: invalid user name\n", cp0); | |
1169 | return (0); | |
1170 | } | |
1171 | ||
1172 | BUF * | |
1173 | allocbuf(BUF *bp, int fd, int blksize) | |
1174 | { | |
1175 | size_t size; | |
1176 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE | |
1177 | struct stat stb; | |
1178 | ||
1179 | if (fstat(fd, &stb) < 0) { | |
1180 | run_err("fstat: %s", strerror(errno)); | |
1181 | return (0); | |
1182 | } | |
1183 | size = roundup(stb.st_blksize, blksize); | |
1184 | if (size == 0) | |
1185 | size = blksize; | |
1186 | #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ | |
1187 | size = blksize; | |
1188 | #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ | |
1189 | if (bp->cnt >= size) | |
1190 | return (bp); | |
1191 | if (bp->buf == NULL) | |
1192 | bp->buf = xmalloc(size); | |
1193 | else | |
1194 | bp->buf = xrealloc(bp->buf, size); | |
1195 | memset(bp->buf, 0, size); | |
1196 | bp->cnt = size; | |
1197 | return (bp); | |
1198 | } | |
1199 | ||
1200 | void | |
1201 | lostconn(int signo) | |
1202 | { | |
1203 | if (!iamremote) | |
1204 | write(STDERR_FILENO, "lost connection\n", 16); | |
1205 | if (signo) | |
1206 | _exit(1); | |
1207 | else | |
1208 | exit(1); | |
1209 | } |