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Commit | Line | Data |
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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 1.132 2006/02/10 01:44:26 stevesk Exp $"); | |
75 | ||
76 | #include <sys/types.h> | |
77 | #include <sys/wait.h> | |
78 | ||
79 | #include <dirent.h> | |
80 | ||
81 | #include "xmalloc.h" | |
82 | #include "atomicio.h" | |
83 | #include "pathnames.h" | |
84 | #include "log.h" | |
85 | #include "misc.h" | |
86 | #include "progressmeter.h" | |
87 | ||
88 | extern char *__progname; | |
89 | ||
90 | void bwlimit(int); | |
91 | ||
92 | /* Struct for addargs */ | |
93 | arglist args; | |
94 | ||
95 | /* Bandwidth limit */ | |
96 | off_t limit_rate = 0; | |
97 | ||
98 | /* Name of current file being transferred. */ | |
99 | char *curfile; | |
100 | ||
101 | /* This is set to non-zero to enable verbose mode. */ | |
102 | int verbose_mode = 0; | |
103 | ||
104 | /* This is set to zero if the progressmeter is not desired. */ | |
105 | int showprogress = 1; | |
106 | ||
107 | /* This is the program to execute for the secured connection. ("ssh" or -S) */ | |
108 | char *ssh_program = _PATH_SSH_PROGRAM; | |
109 | ||
110 | /* This is used to store the pid of ssh_program */ | |
111 | pid_t do_cmd_pid = -1; | |
112 | ||
113 | static void | |
114 | killchild(int signo) | |
115 | { | |
116 | if (do_cmd_pid > 1) { | |
117 | kill(do_cmd_pid, signo ? signo : SIGTERM); | |
118 | waitpid(do_cmd_pid, NULL, 0); | |
119 | } | |
120 | ||
121 | if (signo) | |
122 | _exit(1); | |
123 | exit(1); | |
124 | } | |
125 | ||
126 | static int | |
127 | do_local_cmd(arglist *a) | |
128 | { | |
129 | u_int i; | |
130 | int status; | |
131 | pid_t pid; | |
132 | ||
133 | if (a->num == 0) | |
134 | fatal("do_local_cmd: no arguments"); | |
135 | ||
136 | if (verbose_mode) { | |
137 | fprintf(stderr, "Executing:"); | |
138 | for (i = 0; i < a->num; i++) | |
139 | fprintf(stderr, " %s", a->list[i]); | |
140 | fprintf(stderr, "\n"); | |
141 | } | |
142 | if ((pid = fork()) == -1) | |
143 | fatal("do_local_cmd: fork: %s", strerror(errno)); | |
144 | ||
145 | if (pid == 0) { | |
146 | execvp(a->list[0], a->list); | |
147 | perror(a->list[0]); | |
148 | exit(1); | |
149 | } | |
150 | ||
151 | do_cmd_pid = pid; | |
152 | signal(SIGTERM, killchild); | |
153 | signal(SIGINT, killchild); | |
154 | signal(SIGHUP, killchild); | |
155 | ||
156 | while (waitpid(pid, &status, 0) == -1) | |
157 | if (errno != EINTR) | |
158 | fatal("do_local_cmd: waitpid: %s", strerror(errno)); | |
159 | ||
160 | do_cmd_pid = -1; | |
161 | ||
162 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) | |
163 | return (-1); | |
164 | ||
165 | return (0); | |
166 | } | |
167 | ||
168 | /* | |
169 | * This function executes the given command as the specified user on the | |
170 | * given host. This returns < 0 if execution fails, and >= 0 otherwise. This | |
171 | * assigns the input and output file descriptors on success. | |
172 | */ | |
173 | ||
174 | int | |
175 | do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc) | |
176 | { | |
177 | int pin[2], pout[2], reserved[2]; | |
178 | ||
179 | if (verbose_mode) | |
180 | fprintf(stderr, | |
181 | "Executing: program %s host %s, user %s, command %s\n", | |
182 | ssh_program, host, | |
183 | remuser ? remuser : "(unspecified)", cmd); | |
184 | ||
185 | /* | |
186 | * Reserve two descriptors so that the real pipes won't get | |
187 | * descriptors 0 and 1 because that will screw up dup2 below. | |
188 | */ | |
189 | pipe(reserved); | |
190 | ||
191 | /* Create a socket pair for communicating with ssh. */ | |
192 | if (pipe(pin) < 0) | |
193 | fatal("pipe: %s", strerror(errno)); | |
194 | if (pipe(pout) < 0) | |
195 | fatal("pipe: %s", strerror(errno)); | |
196 | ||
197 | /* Free the reserved descriptors. */ | |
198 | close(reserved[0]); | |
199 | close(reserved[1]); | |
200 | ||
201 | /* Fork a child to execute the command on the remote host using ssh. */ | |
202 | do_cmd_pid = fork(); | |
203 | if (do_cmd_pid == 0) { | |
204 | /* Child. */ | |
205 | close(pin[1]); | |
206 | close(pout[0]); | |
207 | dup2(pin[0], 0); | |
208 | dup2(pout[1], 1); | |
209 | close(pin[0]); | |
210 | close(pout[1]); | |
211 | ||
212 | replacearg(&args, 0, "%s", ssh_program); | |
213 | if (remuser != NULL) | |
214 | addargs(&args, "-l%s", remuser); | |
215 | addargs(&args, "%s", host); | |
216 | addargs(&args, "%s", cmd); | |
217 | ||
218 | execvp(ssh_program, args.list); | |
219 | perror(ssh_program); | |
220 | exit(1); | |
221 | } else if (do_cmd_pid == -1) { | |
222 | fatal("fork: %s", strerror(errno)); | |
223 | } | |
224 | /* Parent. Close the other side, and return the local side. */ | |
225 | close(pin[0]); | |
226 | *fdout = pin[1]; | |
227 | close(pout[1]); | |
228 | *fdin = pout[0]; | |
229 | signal(SIGTERM, killchild); | |
230 | signal(SIGINT, killchild); | |
231 | signal(SIGHUP, killchild); | |
232 | return 0; | |
233 | } | |
234 | ||
235 | typedef struct { | |
236 | size_t cnt; | |
237 | char *buf; | |
238 | } BUF; | |
239 | ||
240 | BUF *allocbuf(BUF *, int, int); | |
241 | void lostconn(int); | |
242 | void nospace(void); | |
243 | int okname(char *); | |
244 | void run_err(const char *,...); | |
245 | void verifydir(char *); | |
246 | ||
247 | struct passwd *pwd; | |
248 | uid_t userid; | |
249 | int errs, remin, remout; | |
250 | int pflag, iamremote, iamrecursive, targetshouldbedirectory; | |
251 | ||
252 | #define CMDNEEDS 64 | |
253 | char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ | |
254 | ||
255 | int response(void); | |
256 | void rsource(char *, struct stat *); | |
257 | void sink(int, char *[]); | |
258 | void source(int, char *[]); | |
259 | void tolocal(int, char *[]); | |
260 | void toremote(char *, int, char *[]); | |
261 | void usage(void); | |
262 | ||
263 | int | |
264 | main(int argc, char **argv) | |
265 | { | |
266 | int ch, fflag, tflag, status; | |
267 | double speed; | |
268 | char *targ, *endp; | |
269 | extern char *optarg; | |
270 | extern int optind; | |
271 | ||
272 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ | |
273 | sanitise_stdfd(); | |
274 | ||
275 | __progname = ssh_get_progname(argv[0]); | |
276 | ||
277 | memset(&args, '\0', sizeof(args)); | |
278 | args.list = NULL; | |
279 | addargs(&args, "%s", ssh_program); | |
280 | addargs(&args, "-x"); | |
281 | addargs(&args, "-oForwardAgent no"); | |
282 | addargs(&args, "-oPermitLocalCommand no"); | |
283 | addargs(&args, "-oClearAllForwardings yes"); | |
284 | ||
285 | fflag = tflag = 0; | |
286 | while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1) | |
287 | switch (ch) { | |
288 | /* User-visible flags. */ | |
289 | case '1': | |
290 | case '2': | |
291 | case '4': | |
292 | case '6': | |
293 | case 'C': | |
294 | addargs(&args, "-%c", ch); | |
295 | break; | |
296 | case 'o': | |
297 | case 'c': | |
298 | case 'i': | |
299 | case 'F': | |
300 | addargs(&args, "-%c%s", ch, optarg); | |
301 | break; | |
302 | case 'P': | |
303 | addargs(&args, "-p%s", optarg); | |
304 | break; | |
305 | case 'B': | |
306 | addargs(&args, "-oBatchmode yes"); | |
307 | break; | |
308 | case 'l': | |
309 | speed = strtod(optarg, &endp); | |
310 | if (speed <= 0 || *endp != '\0') | |
311 | usage(); | |
312 | limit_rate = speed * 1024; | |
313 | break; | |
314 | case 'p': | |
315 | pflag = 1; | |
316 | break; | |
317 | case 'r': | |
318 | iamrecursive = 1; | |
319 | break; | |
320 | case 'S': | |
321 | ssh_program = xstrdup(optarg); | |
322 | break; | |
323 | case 'v': | |
324 | addargs(&args, "-v"); | |
325 | verbose_mode = 1; | |
326 | break; | |
327 | case 'q': | |
328 | addargs(&args, "-q"); | |
329 | showprogress = 0; | |
330 | break; | |
331 | ||
332 | /* Server options. */ | |
333 | case 'd': | |
334 | targetshouldbedirectory = 1; | |
335 | break; | |
336 | case 'f': /* "from" */ | |
337 | iamremote = 1; | |
338 | fflag = 1; | |
339 | break; | |
340 | case 't': /* "to" */ | |
341 | iamremote = 1; | |
342 | tflag = 1; | |
343 | #ifdef HAVE_CYGWIN | |
344 | setmode(0, O_BINARY); | |
345 | #endif | |
346 | break; | |
347 | default: | |
348 | usage(); | |
349 | } | |
350 | argc -= optind; | |
351 | argv += optind; | |
352 | ||
353 | if ((pwd = getpwuid(userid = getuid())) == NULL) | |
354 | fatal("unknown user %u", (u_int) userid); | |
355 | ||
356 | if (!isatty(STDERR_FILENO)) | |
357 | showprogress = 0; | |
358 | ||
359 | remin = STDIN_FILENO; | |
360 | remout = STDOUT_FILENO; | |
361 | ||
362 | if (fflag) { | |
363 | /* Follow "protocol", send data. */ | |
364 | (void) response(); | |
365 | source(argc, argv); | |
366 | exit(errs != 0); | |
367 | } | |
368 | if (tflag) { | |
369 | /* Receive data. */ | |
370 | sink(argc, argv); | |
371 | exit(errs != 0); | |
372 | } | |
373 | if (argc < 2) | |
374 | usage(); | |
375 | if (argc > 2) | |
376 | targetshouldbedirectory = 1; | |
377 | ||
378 | remin = remout = -1; | |
379 | do_cmd_pid = -1; | |
380 | /* Command to be executed on remote system using "ssh". */ | |
381 | (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", | |
382 | verbose_mode ? " -v" : "", | |
383 | iamrecursive ? " -r" : "", pflag ? " -p" : "", | |
384 | targetshouldbedirectory ? " -d" : ""); | |
385 | ||
386 | (void) signal(SIGPIPE, lostconn); | |
387 | ||
388 | if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ | |
389 | toremote(targ, argc, argv); | |
390 | else { | |
391 | if (targetshouldbedirectory) | |
392 | verifydir(argv[argc - 1]); | |
393 | tolocal(argc, argv); /* Dest is local host. */ | |
394 | } | |
395 | /* | |
396 | * Finally check the exit status of the ssh process, if one was forked | |
397 | * and no error has occured yet | |
398 | */ | |
399 | if (do_cmd_pid != -1 && errs == 0) { | |
400 | if (remin != -1) | |
401 | (void) close(remin); | |
402 | if (remout != -1) | |
403 | (void) close(remout); | |
404 | if (waitpid(do_cmd_pid, &status, 0) == -1) | |
405 | errs = 1; | |
406 | else { | |
407 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) | |
408 | errs = 1; | |
409 | } | |
410 | } | |
411 | exit(errs != 0); | |
412 | } | |
413 | ||
414 | void | |
415 | toremote(char *targ, int argc, char **argv) | |
416 | { | |
417 | int i, len; | |
418 | char *bp, *host, *src, *suser, *thost, *tuser, *arg; | |
419 | arglist alist; | |
420 | ||
421 | memset(&alist, '\0', sizeof(alist)); | |
422 | alist.list = NULL; | |
423 | ||
424 | *targ++ = 0; | |
425 | if (*targ == 0) | |
426 | targ = "."; | |
427 | ||
428 | arg = xstrdup(argv[argc - 1]); | |
429 | if ((thost = strrchr(arg, '@'))) { | |
430 | /* user@host */ | |
431 | *thost++ = 0; | |
432 | tuser = arg; | |
433 | if (*tuser == '\0') | |
434 | tuser = NULL; | |
435 | } else { | |
436 | thost = arg; | |
437 | tuser = NULL; | |
438 | } | |
439 | ||
440 | if (tuser != NULL && !okname(tuser)) { | |
441 | xfree(arg); | |
442 | return; | |
443 | } | |
444 | ||
445 | for (i = 0; i < argc - 1; i++) { | |
446 | src = colon(argv[i]); | |
447 | if (src) { /* remote to remote */ | |
448 | freeargs(&alist); | |
449 | addargs(&alist, "%s", ssh_program); | |
450 | if (verbose_mode) | |
451 | addargs(&alist, "-v"); | |
452 | addargs(&alist, "-x"); | |
453 | addargs(&alist, "-oClearAllForwardings yes"); | |
454 | addargs(&alist, "-n"); | |
455 | ||
456 | *src++ = 0; | |
457 | if (*src == 0) | |
458 | src = "."; | |
459 | host = strrchr(argv[i], '@'); | |
460 | ||
461 | if (host) { | |
462 | *host++ = 0; | |
463 | host = cleanhostname(host); | |
464 | suser = argv[i]; | |
465 | if (*suser == '\0') | |
466 | suser = pwd->pw_name; | |
467 | else if (!okname(suser)) | |
468 | continue; | |
469 | addargs(&alist, "-l"); | |
470 | addargs(&alist, "%s", suser); | |
471 | } else { | |
472 | host = cleanhostname(argv[i]); | |
473 | } | |
474 | addargs(&alist, "%s", host); | |
475 | addargs(&alist, "%s", cmd); | |
476 | addargs(&alist, "%s", src); | |
477 | addargs(&alist, "%s%s%s:%s", | |
478 | tuser ? tuser : "", tuser ? "@" : "", | |
479 | thost, targ); | |
480 | if (do_local_cmd(&alist) != 0) | |
481 | errs = 1; | |
482 | } else { /* local to remote */ | |
483 | if (remin == -1) { | |
484 | len = strlen(targ) + CMDNEEDS + 20; | |
485 | bp = xmalloc(len); | |
486 | (void) snprintf(bp, len, "%s -t %s", cmd, targ); | |
487 | host = cleanhostname(thost); | |
488 | if (do_cmd(host, tuser, bp, &remin, | |
489 | &remout, argc) < 0) | |
490 | exit(1); | |
491 | if (response() < 0) | |
492 | exit(1); | |
493 | (void) xfree(bp); | |
494 | } | |
495 | source(1, argv + i); | |
496 | } | |
497 | } | |
498 | } | |
499 | ||
500 | void | |
501 | tolocal(int argc, char **argv) | |
502 | { | |
503 | int i, len; | |
504 | char *bp, *host, *src, *suser; | |
505 | arglist alist; | |
506 | ||
507 | memset(&alist, '\0', sizeof(alist)); | |
508 | alist.list = NULL; | |
509 | ||
510 | for (i = 0; i < argc - 1; i++) { | |
511 | if (!(src = colon(argv[i]))) { /* Local to local. */ | |
512 | freeargs(&alist); | |
513 | addargs(&alist, "%s", _PATH_CP); | |
514 | if (iamrecursive) | |
515 | addargs(&alist, "-r"); | |
516 | if (pflag) | |
517 | addargs(&alist, "-p"); | |
518 | addargs(&alist, "%s", argv[i]); | |
519 | addargs(&alist, "%s", argv[argc-1]); | |
520 | if (do_local_cmd(&alist)) | |
521 | ++errs; | |
522 | continue; | |
523 | } | |
524 | *src++ = 0; | |
525 | if (*src == 0) | |
526 | src = "."; | |
527 | if ((host = strrchr(argv[i], '@')) == NULL) { | |
528 | host = argv[i]; | |
529 | suser = NULL; | |
530 | } else { | |
531 | *host++ = 0; | |
532 | suser = argv[i]; | |
533 | if (*suser == '\0') | |
534 | suser = pwd->pw_name; | |
535 | } | |
536 | host = cleanhostname(host); | |
537 | len = strlen(src) + CMDNEEDS + 20; | |
538 | bp = xmalloc(len); | |
539 | (void) snprintf(bp, len, "%s -f %s", cmd, src); | |
540 | if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) { | |
541 | (void) xfree(bp); | |
542 | ++errs; | |
543 | continue; | |
544 | } | |
545 | xfree(bp); | |
546 | sink(1, argv + argc - 1); | |
547 | (void) close(remin); | |
548 | remin = remout = -1; | |
549 | } | |
550 | } | |
551 | ||
552 | void | |
553 | source(int argc, char **argv) | |
554 | { | |
555 | struct stat stb; | |
556 | static BUF buffer; | |
557 | BUF *bp; | |
558 | off_t i, amt, statbytes; | |
559 | size_t result; | |
560 | int fd = -1, haderr, indx; | |
561 | char *last, *name, buf[2048]; | |
562 | int len; | |
563 | ||
564 | for (indx = 0; indx < argc; ++indx) { | |
565 | name = argv[indx]; | |
566 | statbytes = 0; | |
567 | len = strlen(name); | |
568 | while (len > 1 && name[len-1] == '/') | |
569 | name[--len] = '\0'; | |
570 | if (strchr(name, '\n') != NULL) { | |
571 | run_err("%s: skipping, filename contains a newline", | |
572 | name); | |
573 | goto next; | |
574 | } | |
575 | if ((fd = open(name, O_RDONLY, 0)) < 0) | |
576 | goto syserr; | |
577 | if (fstat(fd, &stb) < 0) { | |
578 | syserr: run_err("%s: %s", name, strerror(errno)); | |
579 | goto next; | |
580 | } | |
581 | switch (stb.st_mode & S_IFMT) { | |
582 | case S_IFREG: | |
583 | break; | |
584 | case S_IFDIR: | |
585 | if (iamrecursive) { | |
586 | rsource(name, &stb); | |
587 | goto next; | |
588 | } | |
589 | /* FALLTHROUGH */ | |
590 | default: | |
591 | run_err("%s: not a regular file", name); | |
592 | goto next; | |
593 | } | |
594 | if ((last = strrchr(name, '/')) == NULL) | |
595 | last = name; | |
596 | else | |
597 | ++last; | |
598 | curfile = last; | |
599 | if (pflag) { | |
600 | /* | |
601 | * Make it compatible with possible future | |
602 | * versions expecting microseconds. | |
603 | */ | |
604 | (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", | |
605 | (u_long) stb.st_mtime, | |
606 | (u_long) stb.st_atime); | |
607 | (void) atomicio(vwrite, remout, buf, strlen(buf)); | |
608 | if (response() < 0) | |
609 | goto next; | |
610 | } | |
611 | #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) | |
612 | snprintf(buf, sizeof buf, "C%04o %lld %s\n", | |
613 | (u_int) (stb.st_mode & FILEMODEMASK), | |
614 | (long long)stb.st_size, last); | |
615 | if (verbose_mode) { | |
616 | fprintf(stderr, "Sending file modes: %s", buf); | |
617 | } | |
618 | (void) atomicio(vwrite, remout, buf, strlen(buf)); | |
619 | if (response() < 0) | |
620 | goto next; | |
621 | if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { | |
622 | next: if (fd != -1) { | |
623 | (void) close(fd); | |
624 | fd = -1; | |
625 | } | |
626 | continue; | |
627 | } | |
628 | if (showprogress) | |
629 | start_progress_meter(curfile, stb.st_size, &statbytes); | |
630 | /* Keep writing after an error so that we stay sync'd up. */ | |
631 | for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { | |
632 | amt = bp->cnt; | |
633 | if (i + amt > stb.st_size) | |
634 | amt = stb.st_size - i; | |
635 | if (!haderr) { | |
636 | result = atomicio(read, fd, bp->buf, amt); | |
637 | if (result != amt) | |
638 | haderr = errno; | |
639 | } | |
640 | if (haderr) | |
641 | (void) atomicio(vwrite, remout, bp->buf, amt); | |
642 | else { | |
643 | result = atomicio(vwrite, remout, bp->buf, amt); | |
644 | if (result != amt) | |
645 | haderr = errno; | |
646 | statbytes += result; | |
647 | } | |
648 | if (limit_rate) | |
649 | bwlimit(amt); | |
650 | } | |
651 | if (showprogress) | |
652 | stop_progress_meter(); | |
653 | ||
654 | if (fd != -1) { | |
655 | if (close(fd) < 0 && !haderr) | |
656 | haderr = errno; | |
657 | fd = -1; | |
658 | } | |
659 | if (!haderr) | |
660 | (void) atomicio(vwrite, remout, "", 1); | |
661 | else | |
662 | run_err("%s: %s", name, strerror(haderr)); | |
663 | (void) response(); | |
664 | } | |
665 | } | |
666 | ||
667 | void | |
668 | rsource(char *name, struct stat *statp) | |
669 | { | |
670 | DIR *dirp; | |
671 | struct dirent *dp; | |
672 | char *last, *vect[1], path[1100]; | |
673 | ||
674 | if (!(dirp = opendir(name))) { | |
675 | run_err("%s: %s", name, strerror(errno)); | |
676 | return; | |
677 | } | |
678 | last = strrchr(name, '/'); | |
679 | if (last == 0) | |
680 | last = name; | |
681 | else | |
682 | last++; | |
683 | if (pflag) { | |
684 | (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", | |
685 | (u_long) statp->st_mtime, | |
686 | (u_long) statp->st_atime); | |
687 | (void) atomicio(vwrite, remout, path, strlen(path)); | |
688 | if (response() < 0) { | |
689 | closedir(dirp); | |
690 | return; | |
691 | } | |
692 | } | |
693 | (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", | |
694 | (u_int) (statp->st_mode & FILEMODEMASK), 0, last); | |
695 | if (verbose_mode) | |
696 | fprintf(stderr, "Entering directory: %s", path); | |
697 | (void) atomicio(vwrite, remout, path, strlen(path)); | |
698 | if (response() < 0) { | |
699 | closedir(dirp); | |
700 | return; | |
701 | } | |
702 | while ((dp = readdir(dirp)) != NULL) { | |
703 | if (dp->d_ino == 0) | |
704 | continue; | |
705 | if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) | |
706 | continue; | |
707 | if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { | |
708 | run_err("%s/%s: name too long", name, dp->d_name); | |
709 | continue; | |
710 | } | |
711 | (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); | |
712 | vect[0] = path; | |
713 | source(1, vect); | |
714 | } | |
715 | (void) closedir(dirp); | |
716 | (void) atomicio(vwrite, remout, "E\n", 2); | |
717 | (void) response(); | |
718 | } | |
719 | ||
720 | void | |
721 | bwlimit(int amount) | |
722 | { | |
723 | static struct timeval bwstart, bwend; | |
724 | static int lamt, thresh = 16384; | |
725 | u_int64_t waitlen; | |
726 | struct timespec ts, rm; | |
727 | ||
728 | if (!timerisset(&bwstart)) { | |
729 | gettimeofday(&bwstart, NULL); | |
730 | return; | |
731 | } | |
732 | ||
733 | lamt += amount; | |
734 | if (lamt < thresh) | |
735 | return; | |
736 | ||
737 | gettimeofday(&bwend, NULL); | |
738 | timersub(&bwend, &bwstart, &bwend); | |
739 | if (!timerisset(&bwend)) | |
740 | return; | |
741 | ||
742 | lamt *= 8; | |
743 | waitlen = (double)1000000L * lamt / limit_rate; | |
744 | ||
745 | bwstart.tv_sec = waitlen / 1000000L; | |
746 | bwstart.tv_usec = waitlen % 1000000L; | |
747 | ||
748 | if (timercmp(&bwstart, &bwend, >)) { | |
749 | timersub(&bwstart, &bwend, &bwend); | |
750 | ||
751 | /* Adjust the wait time */ | |
752 | if (bwend.tv_sec) { | |
753 | thresh /= 2; | |
754 | if (thresh < 2048) | |
755 | thresh = 2048; | |
756 | } else if (bwend.tv_usec < 100) { | |
757 | thresh *= 2; | |
758 | if (thresh > 32768) | |
759 | thresh = 32768; | |
760 | } | |
761 | ||
762 | TIMEVAL_TO_TIMESPEC(&bwend, &ts); | |
763 | while (nanosleep(&ts, &rm) == -1) { | |
764 | if (errno != EINTR) | |
765 | break; | |
766 | ts = rm; | |
767 | } | |
768 | } | |
769 | ||
770 | lamt = 0; | |
771 | gettimeofday(&bwstart, NULL); | |
772 | } | |
773 | ||
774 | void | |
775 | sink(int argc, char **argv) | |
776 | { | |
777 | static BUF buffer; | |
778 | struct stat stb; | |
779 | enum { | |
780 | YES, NO, DISPLAYED | |
781 | } wrerr; | |
782 | BUF *bp; | |
783 | off_t i; | |
784 | size_t j, count; | |
785 | int amt, exists, first, mask, mode, ofd, omode; | |
786 | off_t size, statbytes; | |
787 | int setimes, targisdir, wrerrno = 0; | |
788 | char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; | |
789 | struct timeval tv[2]; | |
790 | ||
791 | #define atime tv[0] | |
792 | #define mtime tv[1] | |
793 | #define SCREWUP(str) { why = str; goto screwup; } | |
794 | ||
795 | setimes = targisdir = 0; | |
796 | mask = umask(0); | |
797 | if (!pflag) | |
798 | (void) umask(mask); | |
799 | if (argc != 1) { | |
800 | run_err("ambiguous target"); | |
801 | exit(1); | |
802 | } | |
803 | targ = *argv; | |
804 | if (targetshouldbedirectory) | |
805 | verifydir(targ); | |
806 | ||
807 | (void) atomicio(vwrite, remout, "", 1); | |
808 | if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) | |
809 | targisdir = 1; | |
810 | for (first = 1;; first = 0) { | |
811 | cp = buf; | |
812 | if (atomicio(read, remin, cp, 1) != 1) | |
813 | return; | |
814 | if (*cp++ == '\n') | |
815 | SCREWUP("unexpected <newline>"); | |
816 | do { | |
817 | if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) | |
818 | SCREWUP("lost connection"); | |
819 | *cp++ = ch; | |
820 | } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); | |
821 | *cp = 0; | |
822 | if (verbose_mode) | |
823 | fprintf(stderr, "Sink: %s", buf); | |
824 | ||
825 | if (buf[0] == '\01' || buf[0] == '\02') { | |
826 | if (iamremote == 0) | |
827 | (void) atomicio(vwrite, STDERR_FILENO, | |
828 | buf + 1, strlen(buf + 1)); | |
829 | if (buf[0] == '\02') | |
830 | exit(1); | |
831 | ++errs; | |
832 | continue; | |
833 | } | |
834 | if (buf[0] == 'E') { | |
835 | (void) atomicio(vwrite, remout, "", 1); | |
836 | return; | |
837 | } | |
838 | if (ch == '\n') | |
839 | *--cp = 0; | |
840 | ||
841 | cp = buf; | |
842 | if (*cp == 'T') { | |
843 | setimes++; | |
844 | cp++; | |
845 | mtime.tv_sec = strtol(cp, &cp, 10); | |
846 | if (!cp || *cp++ != ' ') | |
847 | SCREWUP("mtime.sec not delimited"); | |
848 | mtime.tv_usec = strtol(cp, &cp, 10); | |
849 | if (!cp || *cp++ != ' ') | |
850 | SCREWUP("mtime.usec not delimited"); | |
851 | atime.tv_sec = strtol(cp, &cp, 10); | |
852 | if (!cp || *cp++ != ' ') | |
853 | SCREWUP("atime.sec not delimited"); | |
854 | atime.tv_usec = strtol(cp, &cp, 10); | |
855 | if (!cp || *cp++ != '\0') | |
856 | SCREWUP("atime.usec not delimited"); | |
857 | (void) atomicio(vwrite, remout, "", 1); | |
858 | continue; | |
859 | } | |
860 | if (*cp != 'C' && *cp != 'D') { | |
861 | /* | |
862 | * Check for the case "rcp remote:foo\* local:bar". | |
863 | * In this case, the line "No match." can be returned | |
864 | * by the shell before the rcp command on the remote is | |
865 | * executed so the ^Aerror_message convention isn't | |
866 | * followed. | |
867 | */ | |
868 | if (first) { | |
869 | run_err("%s", cp); | |
870 | exit(1); | |
871 | } | |
872 | SCREWUP("expected control record"); | |
873 | } | |
874 | mode = 0; | |
875 | for (++cp; cp < buf + 5; cp++) { | |
876 | if (*cp < '0' || *cp > '7') | |
877 | SCREWUP("bad mode"); | |
878 | mode = (mode << 3) | (*cp - '0'); | |
879 | } | |
880 | if (*cp++ != ' ') | |
881 | SCREWUP("mode not delimited"); | |
882 | ||
883 | for (size = 0; isdigit(*cp);) | |
884 | size = size * 10 + (*cp++ - '0'); | |
885 | if (*cp++ != ' ') | |
886 | SCREWUP("size not delimited"); | |
887 | if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { | |
888 | run_err("error: unexpected filename: %s", cp); | |
889 | exit(1); | |
890 | } | |
891 | if (targisdir) { | |
892 | static char *namebuf; | |
893 | static size_t cursize; | |
894 | size_t need; | |
895 | ||
896 | need = strlen(targ) + strlen(cp) + 250; | |
897 | if (need > cursize) { | |
898 | if (namebuf) | |
899 | xfree(namebuf); | |
900 | namebuf = xmalloc(need); | |
901 | cursize = need; | |
902 | } | |
903 | (void) snprintf(namebuf, need, "%s%s%s", targ, | |
904 | strcmp(targ, "/") ? "/" : "", cp); | |
905 | np = namebuf; | |
906 | } else | |
907 | np = targ; | |
908 | curfile = cp; | |
909 | exists = stat(np, &stb) == 0; | |
910 | if (buf[0] == 'D') { | |
911 | int mod_flag = pflag; | |
912 | if (!iamrecursive) | |
913 | SCREWUP("received directory without -r"); | |
914 | if (exists) { | |
915 | if (!S_ISDIR(stb.st_mode)) { | |
916 | errno = ENOTDIR; | |
917 | goto bad; | |
918 | } | |
919 | if (pflag) | |
920 | (void) chmod(np, mode); | |
921 | } else { | |
922 | /* Handle copying from a read-only | |
923 | directory */ | |
924 | mod_flag = 1; | |
925 | if (mkdir(np, mode | S_IRWXU) < 0) | |
926 | goto bad; | |
927 | } | |
928 | vect[0] = xstrdup(np); | |
929 | sink(1, vect); | |
930 | if (setimes) { | |
931 | setimes = 0; | |
932 | if (utimes(vect[0], tv) < 0) | |
933 | run_err("%s: set times: %s", | |
934 | vect[0], strerror(errno)); | |
935 | } | |
936 | if (mod_flag) | |
937 | (void) chmod(vect[0], mode); | |
938 | if (vect[0]) | |
939 | xfree(vect[0]); | |
940 | continue; | |
941 | } | |
942 | omode = mode; | |
943 | mode |= S_IWRITE; | |
944 | if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { | |
945 | bad: run_err("%s: %s", np, strerror(errno)); | |
946 | continue; | |
947 | } | |
948 | (void) atomicio(vwrite, remout, "", 1); | |
949 | if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) { | |
950 | (void) close(ofd); | |
951 | continue; | |
952 | } | |
953 | cp = bp->buf; | |
954 | wrerr = NO; | |
955 | ||
956 | statbytes = 0; | |
957 | if (showprogress) | |
958 | start_progress_meter(curfile, size, &statbytes); | |
959 | for (count = i = 0; i < size; i += 4096) { | |
960 | amt = 4096; | |
961 | if (i + amt > size) | |
962 | amt = size - i; | |
963 | count += amt; | |
964 | do { | |
965 | j = atomicio(read, remin, cp, amt); | |
966 | if (j == 0) { | |
967 | run_err("%s", j ? strerror(errno) : | |
968 | "dropped connection"); | |
969 | exit(1); | |
970 | } | |
971 | amt -= j; | |
972 | cp += j; | |
973 | statbytes += j; | |
974 | } while (amt > 0); | |
975 | ||
976 | if (limit_rate) | |
977 | bwlimit(4096); | |
978 | ||
979 | if (count == bp->cnt) { | |
980 | /* Keep reading so we stay sync'd up. */ | |
981 | if (wrerr == NO) { | |
982 | if (atomicio(vwrite, ofd, bp->buf, | |
983 | count) != count) { | |
984 | wrerr = YES; | |
985 | wrerrno = errno; | |
986 | } | |
987 | } | |
988 | count = 0; | |
989 | cp = bp->buf; | |
990 | } | |
991 | } | |
992 | if (showprogress) | |
993 | stop_progress_meter(); | |
994 | if (count != 0 && wrerr == NO && | |
995 | atomicio(vwrite, ofd, bp->buf, count) != count) { | |
996 | wrerr = YES; | |
997 | wrerrno = errno; | |
998 | } | |
999 | if (wrerr == NO && ftruncate(ofd, size) != 0) { | |
1000 | run_err("%s: truncate: %s", np, strerror(errno)); | |
1001 | wrerr = DISPLAYED; | |
1002 | } | |
1003 | if (pflag) { | |
1004 | if (exists || omode != mode) | |
1005 | #ifdef HAVE_FCHMOD | |
1006 | if (fchmod(ofd, omode)) { | |
1007 | #else /* HAVE_FCHMOD */ | |
1008 | if (chmod(np, omode)) { | |
1009 | #endif /* HAVE_FCHMOD */ | |
1010 | run_err("%s: set mode: %s", | |
1011 | np, strerror(errno)); | |
1012 | wrerr = DISPLAYED; | |
1013 | } | |
1014 | } else { | |
1015 | if (!exists && omode != mode) | |
1016 | #ifdef HAVE_FCHMOD | |
1017 | if (fchmod(ofd, omode & ~mask)) { | |
1018 | #else /* HAVE_FCHMOD */ | |
1019 | if (chmod(np, omode & ~mask)) { | |
1020 | #endif /* HAVE_FCHMOD */ | |
1021 | run_err("%s: set mode: %s", | |
1022 | np, strerror(errno)); | |
1023 | wrerr = DISPLAYED; | |
1024 | } | |
1025 | } | |
1026 | if (close(ofd) == -1) { | |
1027 | wrerr = YES; | |
1028 | wrerrno = errno; | |
1029 | } | |
1030 | (void) response(); | |
1031 | if (setimes && wrerr == NO) { | |
1032 | setimes = 0; | |
1033 | if (utimes(np, tv) < 0) { | |
1034 | run_err("%s: set times: %s", | |
1035 | np, strerror(errno)); | |
1036 | wrerr = DISPLAYED; | |
1037 | } | |
1038 | } | |
1039 | switch (wrerr) { | |
1040 | case YES: | |
1041 | run_err("%s: %s", np, strerror(wrerrno)); | |
1042 | break; | |
1043 | case NO: | |
1044 | (void) atomicio(vwrite, remout, "", 1); | |
1045 | break; | |
1046 | case DISPLAYED: | |
1047 | break; | |
1048 | } | |
1049 | } | |
1050 | screwup: | |
1051 | run_err("protocol error: %s", why); | |
1052 | exit(1); | |
1053 | } | |
1054 | ||
1055 | int | |
1056 | response(void) | |
1057 | { | |
1058 | char ch, *cp, resp, rbuf[2048]; | |
1059 | ||
1060 | if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) | |
1061 | lostconn(0); | |
1062 | ||
1063 | cp = rbuf; | |
1064 | switch (resp) { | |
1065 | case 0: /* ok */ | |
1066 | return (0); | |
1067 | default: | |
1068 | *cp++ = resp; | |
1069 | /* FALLTHROUGH */ | |
1070 | case 1: /* error, followed by error msg */ | |
1071 | case 2: /* fatal error, "" */ | |
1072 | do { | |
1073 | if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) | |
1074 | lostconn(0); | |
1075 | *cp++ = ch; | |
1076 | } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); | |
1077 | ||
1078 | if (!iamremote) | |
1079 | (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); | |
1080 | ++errs; | |
1081 | if (resp == 1) | |
1082 | return (-1); | |
1083 | exit(1); | |
1084 | } | |
1085 | /* NOTREACHED */ | |
1086 | } | |
1087 | ||
1088 | void | |
1089 | usage(void) | |
1090 | { | |
1091 | (void) fprintf(stderr, | |
1092 | "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" | |
1093 | " [-l limit] [-o ssh_option] [-P port] [-S program]\n" | |
1094 | " [[user@]host1:]file1 [...] [[user@]host2:]file2\n"); | |
1095 | exit(1); | |
1096 | } | |
1097 | ||
1098 | void | |
1099 | run_err(const char *fmt,...) | |
1100 | { | |
1101 | static FILE *fp; | |
1102 | va_list ap; | |
1103 | ||
1104 | ++errs; | |
1105 | if (fp == NULL && !(fp = fdopen(remout, "w"))) | |
1106 | return; | |
1107 | (void) fprintf(fp, "%c", 0x01); | |
1108 | (void) fprintf(fp, "scp: "); | |
1109 | va_start(ap, fmt); | |
1110 | (void) vfprintf(fp, fmt, ap); | |
1111 | va_end(ap); | |
1112 | (void) fprintf(fp, "\n"); | |
1113 | (void) fflush(fp); | |
1114 | ||
1115 | if (!iamremote) { | |
1116 | va_start(ap, fmt); | |
1117 | vfprintf(stderr, fmt, ap); | |
1118 | va_end(ap); | |
1119 | fprintf(stderr, "\n"); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | void | |
1124 | verifydir(char *cp) | |
1125 | { | |
1126 | struct stat stb; | |
1127 | ||
1128 | if (!stat(cp, &stb)) { | |
1129 | if (S_ISDIR(stb.st_mode)) | |
1130 | return; | |
1131 | errno = ENOTDIR; | |
1132 | } | |
1133 | run_err("%s: %s", cp, strerror(errno)); | |
1134 | killchild(0); | |
1135 | } | |
1136 | ||
1137 | int | |
1138 | okname(char *cp0) | |
1139 | { | |
1140 | int c; | |
1141 | char *cp; | |
1142 | ||
1143 | cp = cp0; | |
1144 | do { | |
1145 | c = (int)*cp; | |
1146 | if (c & 0200) | |
1147 | goto bad; | |
1148 | if (!isalpha(c) && !isdigit(c)) { | |
1149 | switch (c) { | |
1150 | case '\'': | |
1151 | case '"': | |
1152 | case '`': | |
1153 | case ' ': | |
1154 | case '#': | |
1155 | goto bad; | |
1156 | default: | |
1157 | break; | |
1158 | } | |
1159 | } | |
1160 | } while (*++cp); | |
1161 | return (1); | |
1162 | ||
1163 | bad: fprintf(stderr, "%s: invalid user name\n", cp0); | |
1164 | return (0); | |
1165 | } | |
1166 | ||
1167 | BUF * | |
1168 | allocbuf(BUF *bp, int fd, int blksize) | |
1169 | { | |
1170 | size_t size; | |
1171 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE | |
1172 | struct stat stb; | |
1173 | ||
1174 | if (fstat(fd, &stb) < 0) { | |
1175 | run_err("fstat: %s", strerror(errno)); | |
1176 | return (0); | |
1177 | } | |
1178 | size = roundup(stb.st_blksize, blksize); | |
1179 | if (size == 0) | |
1180 | size = blksize; | |
1181 | #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ | |
1182 | size = blksize; | |
1183 | #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ | |
1184 | if (bp->cnt >= size) | |
1185 | return (bp); | |
1186 | if (bp->buf == NULL) | |
1187 | bp->buf = xmalloc(size); | |
1188 | else | |
1189 | bp->buf = xrealloc(bp->buf, size); | |
1190 | memset(bp->buf, 0, size); | |
1191 | bp->cnt = size; | |
1192 | return (bp); | |
1193 | } | |
1194 | ||
1195 | void | |
1196 | lostconn(int signo) | |
1197 | { | |
1198 | if (!iamremote) | |
1199 | write(STDERR_FILENO, "lost connection\n", 16); | |
1200 | if (signo) | |
1201 | _exit(1); | |
1202 | else | |
1203 | exit(1); | |
1204 | } |