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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. All advertising materials mentioning features or use of this software | |
56 | * must display the following acknowledgement: | |
57 | * This product includes software developed by the University of | |
58 | * California, Berkeley and its contributors. | |
59 | * 4. Neither the name of the University nor the names of its contributors | |
60 | * may be used to endorse or promote products derived from this software | |
61 | * without specific prior written permission. | |
62 | * | |
63 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
64 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
65 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
66 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
67 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
68 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
69 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
70 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
71 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
72 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
73 | * SUCH DAMAGE. | |
74 | * | |
75 | */ | |
76 | ||
77 | #include "includes.h" | |
78 | RCSID("$OpenBSD: scp.c,v 1.102 2003/03/05 22:33:43 markus Exp $"); | |
79 | ||
80 | #include "xmalloc.h" | |
81 | #include "atomicio.h" | |
82 | #include "pathnames.h" | |
83 | #include "log.h" | |
84 | #include "misc.h" | |
85 | #include "progressmeter.h" | |
86 | ||
87 | #ifdef HAVE___PROGNAME | |
88 | extern char *__progname; | |
89 | #else | |
90 | char *__progname; | |
91 | #endif | |
92 | ||
93 | void bwlimit(int); | |
94 | ||
95 | /* Struct for addargs */ | |
96 | arglist args; | |
97 | ||
98 | /* Bandwidth limit */ | |
99 | off_t limitbw = 0; | |
100 | ||
101 | /* Name of current file being transferred. */ | |
102 | char *curfile; | |
103 | ||
104 | /* This is set to non-zero to enable verbose mode. */ | |
105 | int verbose_mode = 0; | |
106 | ||
107 | /* This is set to zero if the progressmeter is not desired. */ | |
108 | int showprogress = 1; | |
109 | ||
110 | /* This is the program to execute for the secured connection. ("ssh" or -S) */ | |
111 | char *ssh_program = _PATH_SSH_PROGRAM; | |
112 | ||
113 | /* This is used to store the pid of ssh_program */ | |
114 | pid_t do_cmd_pid; | |
115 | ||
116 | /* | |
117 | * This function executes the given command as the specified user on the | |
118 | * given host. This returns < 0 if execution fails, and >= 0 otherwise. This | |
119 | * assigns the input and output file descriptors on success. | |
120 | */ | |
121 | ||
122 | int | |
123 | do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc) | |
124 | { | |
125 | int pin[2], pout[2], reserved[2]; | |
126 | ||
127 | if (verbose_mode) | |
128 | fprintf(stderr, | |
129 | "Executing: program %s host %s, user %s, command %s\n", | |
130 | ssh_program, host, | |
131 | remuser ? remuser : "(unspecified)", cmd); | |
132 | ||
133 | /* | |
134 | * Reserve two descriptors so that the real pipes won't get | |
135 | * descriptors 0 and 1 because that will screw up dup2 below. | |
136 | */ | |
137 | pipe(reserved); | |
138 | ||
139 | /* Create a socket pair for communicating with ssh. */ | |
140 | if (pipe(pin) < 0) | |
141 | fatal("pipe: %s", strerror(errno)); | |
142 | if (pipe(pout) < 0) | |
143 | fatal("pipe: %s", strerror(errno)); | |
144 | ||
145 | /* Free the reserved descriptors. */ | |
146 | close(reserved[0]); | |
147 | close(reserved[1]); | |
148 | ||
149 | /* For a child to execute the command on the remote host using ssh. */ | |
150 | do_cmd_pid = fork(); | |
151 | if (do_cmd_pid == 0) { | |
152 | /* Child. */ | |
153 | close(pin[1]); | |
154 | close(pout[0]); | |
155 | dup2(pin[0], 0); | |
156 | dup2(pout[1], 1); | |
157 | close(pin[0]); | |
158 | close(pout[1]); | |
159 | ||
160 | args.list[0] = ssh_program; | |
161 | if (remuser != NULL) | |
162 | addargs(&args, "-l%s", remuser); | |
163 | addargs(&args, "%s", host); | |
164 | addargs(&args, "%s", cmd); | |
165 | ||
166 | execvp(ssh_program, args.list); | |
167 | perror(ssh_program); | |
168 | exit(1); | |
169 | } else if (do_cmd_pid == -1) { | |
170 | fatal("fork: %s", strerror(errno)); | |
171 | } | |
172 | /* Parent. Close the other side, and return the local side. */ | |
173 | close(pin[0]); | |
174 | *fdout = pin[1]; | |
175 | close(pout[1]); | |
176 | *fdin = pout[0]; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | typedef struct { | |
181 | int cnt; | |
182 | char *buf; | |
183 | } BUF; | |
184 | ||
185 | BUF *allocbuf(BUF *, int, int); | |
186 | void lostconn(int); | |
187 | void nospace(void); | |
188 | int okname(char *); | |
189 | void run_err(const char *,...); | |
190 | void verifydir(char *); | |
191 | ||
192 | struct passwd *pwd; | |
193 | uid_t userid; | |
194 | int errs, remin, remout; | |
195 | int pflag, iamremote, iamrecursive, targetshouldbedirectory; | |
196 | ||
197 | #define CMDNEEDS 64 | |
198 | char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ | |
199 | ||
200 | int response(void); | |
201 | void rsource(char *, struct stat *); | |
202 | void sink(int, char *[]); | |
203 | void source(int, char *[]); | |
204 | void tolocal(int, char *[]); | |
205 | void toremote(char *, int, char *[]); | |
206 | void usage(void); | |
207 | ||
208 | int | |
209 | main(argc, argv) | |
210 | int argc; | |
211 | char *argv[]; | |
212 | { | |
213 | int ch, fflag, tflag, status; | |
214 | double speed; | |
215 | char *targ, *endp; | |
216 | extern char *optarg; | |
217 | extern int optind; | |
218 | ||
219 | __progname = get_progname(argv[0]); | |
220 | ||
221 | args.list = NULL; | |
222 | addargs(&args, "ssh"); /* overwritten with ssh_program */ | |
223 | addargs(&args, "-x"); | |
224 | addargs(&args, "-oForwardAgent no"); | |
225 | addargs(&args, "-oClearAllForwardings yes"); | |
226 | ||
227 | fflag = tflag = 0; | |
228 | while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1) | |
229 | switch (ch) { | |
230 | /* User-visible flags. */ | |
231 | case '1': | |
232 | case '2': | |
233 | case '4': | |
234 | case '6': | |
235 | case 'C': | |
236 | addargs(&args, "-%c", ch); | |
237 | break; | |
238 | case 'o': | |
239 | case 'c': | |
240 | case 'i': | |
241 | case 'F': | |
242 | addargs(&args, "-%c%s", ch, optarg); | |
243 | break; | |
244 | case 'P': | |
245 | addargs(&args, "-p%s", optarg); | |
246 | break; | |
247 | case 'B': | |
248 | addargs(&args, "-oBatchmode yes"); | |
249 | break; | |
250 | case 'l': | |
251 | speed = strtod(optarg, &endp); | |
252 | if (speed <= 0 || *endp != '\0') | |
253 | usage(); | |
254 | limitbw = speed * 1024; | |
255 | break; | |
256 | case 'p': | |
257 | pflag = 1; | |
258 | break; | |
259 | case 'r': | |
260 | iamrecursive = 1; | |
261 | break; | |
262 | case 'S': | |
263 | ssh_program = xstrdup(optarg); | |
264 | break; | |
265 | case 'v': | |
266 | addargs(&args, "-v"); | |
267 | verbose_mode = 1; | |
268 | break; | |
269 | case 'q': | |
270 | showprogress = 0; | |
271 | break; | |
272 | ||
273 | /* Server options. */ | |
274 | case 'd': | |
275 | targetshouldbedirectory = 1; | |
276 | break; | |
277 | case 'f': /* "from" */ | |
278 | iamremote = 1; | |
279 | fflag = 1; | |
280 | break; | |
281 | case 't': /* "to" */ | |
282 | iamremote = 1; | |
283 | tflag = 1; | |
284 | #ifdef HAVE_CYGWIN | |
285 | setmode(0, O_BINARY); | |
286 | #endif | |
287 | break; | |
288 | default: | |
289 | usage(); | |
290 | } | |
291 | argc -= optind; | |
292 | argv += optind; | |
293 | ||
294 | if ((pwd = getpwuid(userid = getuid())) == NULL) | |
295 | fatal("unknown user %d", (int) userid); | |
296 | ||
297 | if (!isatty(STDERR_FILENO)) | |
298 | showprogress = 0; | |
299 | ||
300 | remin = STDIN_FILENO; | |
301 | remout = STDOUT_FILENO; | |
302 | ||
303 | if (fflag) { | |
304 | /* Follow "protocol", send data. */ | |
305 | (void) response(); | |
306 | source(argc, argv); | |
307 | exit(errs != 0); | |
308 | } | |
309 | if (tflag) { | |
310 | /* Receive data. */ | |
311 | sink(argc, argv); | |
312 | exit(errs != 0); | |
313 | } | |
314 | if (argc < 2) | |
315 | usage(); | |
316 | if (argc > 2) | |
317 | targetshouldbedirectory = 1; | |
318 | ||
319 | remin = remout = -1; | |
320 | do_cmd_pid = -1; | |
321 | /* Command to be executed on remote system using "ssh". */ | |
322 | (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", | |
323 | verbose_mode ? " -v" : "", | |
324 | iamrecursive ? " -r" : "", pflag ? " -p" : "", | |
325 | targetshouldbedirectory ? " -d" : ""); | |
326 | ||
327 | (void) signal(SIGPIPE, lostconn); | |
328 | ||
329 | if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ | |
330 | toremote(targ, argc, argv); | |
331 | else { | |
332 | tolocal(argc, argv); /* Dest is local host. */ | |
333 | if (targetshouldbedirectory) | |
334 | verifydir(argv[argc - 1]); | |
335 | } | |
336 | /* | |
337 | * Finally check the exit status of the ssh process, if one was forked | |
338 | * and no error has occured yet | |
339 | */ | |
340 | if (do_cmd_pid != -1 && errs == 0) { | |
341 | if (remin != -1) | |
342 | (void) close(remin); | |
343 | if (remout != -1) | |
344 | (void) close(remout); | |
345 | if (waitpid(do_cmd_pid, &status, 0) == -1) | |
346 | errs = 1; | |
347 | else { | |
348 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) | |
349 | errs = 1; | |
350 | } | |
351 | } | |
352 | exit(errs != 0); | |
353 | } | |
354 | ||
355 | void | |
356 | toremote(targ, argc, argv) | |
357 | char *targ, *argv[]; | |
358 | int argc; | |
359 | { | |
360 | int i, len; | |
361 | char *bp, *host, *src, *suser, *thost, *tuser; | |
362 | ||
363 | *targ++ = 0; | |
364 | if (*targ == 0) | |
365 | targ = "."; | |
366 | ||
367 | if ((thost = strrchr(argv[argc - 1], '@'))) { | |
368 | /* user@host */ | |
369 | *thost++ = 0; | |
370 | tuser = argv[argc - 1]; | |
371 | if (*tuser == '\0') | |
372 | tuser = NULL; | |
373 | } else { | |
374 | thost = argv[argc - 1]; | |
375 | tuser = NULL; | |
376 | } | |
377 | ||
378 | for (i = 0; i < argc - 1; i++) { | |
379 | src = colon(argv[i]); | |
380 | if (src) { /* remote to remote */ | |
381 | static char *ssh_options = | |
382 | "-x -o'ClearAllForwardings yes'"; | |
383 | *src++ = 0; | |
384 | if (*src == 0) | |
385 | src = "."; | |
386 | host = strrchr(argv[i], '@'); | |
387 | len = strlen(ssh_program) + strlen(argv[i]) + | |
388 | strlen(src) + (tuser ? strlen(tuser) : 0) + | |
389 | strlen(thost) + strlen(targ) + | |
390 | strlen(ssh_options) + CMDNEEDS + 20; | |
391 | bp = xmalloc(len); | |
392 | if (host) { | |
393 | *host++ = 0; | |
394 | host = cleanhostname(host); | |
395 | suser = argv[i]; | |
396 | if (*suser == '\0') | |
397 | suser = pwd->pw_name; | |
398 | else if (!okname(suser)) { | |
399 | xfree(bp); | |
400 | continue; | |
401 | } | |
402 | if (tuser && !okname(tuser)) { | |
403 | xfree(bp); | |
404 | continue; | |
405 | } | |
406 | snprintf(bp, len, | |
407 | "%s%s %s -n " | |
408 | "-l %s %s %s %s '%s%s%s:%s'", | |
409 | ssh_program, verbose_mode ? " -v" : "", | |
410 | ssh_options, suser, host, cmd, src, | |
411 | tuser ? tuser : "", tuser ? "@" : "", | |
412 | thost, targ); | |
413 | } else { | |
414 | host = cleanhostname(argv[i]); | |
415 | snprintf(bp, len, | |
416 | "exec %s%s %s -n %s " | |
417 | "%s %s '%s%s%s:%s'", | |
418 | ssh_program, verbose_mode ? " -v" : "", | |
419 | ssh_options, host, cmd, src, | |
420 | tuser ? tuser : "", tuser ? "@" : "", | |
421 | thost, targ); | |
422 | } | |
423 | if (verbose_mode) | |
424 | fprintf(stderr, "Executing: %s\n", bp); | |
425 | (void) system(bp); | |
426 | (void) xfree(bp); | |
427 | } else { /* local to remote */ | |
428 | if (remin == -1) { | |
429 | len = strlen(targ) + CMDNEEDS + 20; | |
430 | bp = xmalloc(len); | |
431 | (void) snprintf(bp, len, "%s -t %s", cmd, targ); | |
432 | host = cleanhostname(thost); | |
433 | if (do_cmd(host, tuser, bp, &remin, | |
434 | &remout, argc) < 0) | |
435 | exit(1); | |
436 | if (response() < 0) | |
437 | exit(1); | |
438 | (void) xfree(bp); | |
439 | } | |
440 | source(1, argv + i); | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
445 | void | |
446 | tolocal(argc, argv) | |
447 | int argc; | |
448 | char *argv[]; | |
449 | { | |
450 | int i, len; | |
451 | char *bp, *host, *src, *suser; | |
452 | ||
453 | for (i = 0; i < argc - 1; i++) { | |
454 | if (!(src = colon(argv[i]))) { /* Local to local. */ | |
455 | len = strlen(_PATH_CP) + strlen(argv[i]) + | |
456 | strlen(argv[argc - 1]) + 20; | |
457 | bp = xmalloc(len); | |
458 | (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP, | |
459 | iamrecursive ? " -r" : "", pflag ? " -p" : "", | |
460 | argv[i], argv[argc - 1]); | |
461 | if (verbose_mode) | |
462 | fprintf(stderr, "Executing: %s\n", bp); | |
463 | if (system(bp)) | |
464 | ++errs; | |
465 | (void) xfree(bp); | |
466 | continue; | |
467 | } | |
468 | *src++ = 0; | |
469 | if (*src == 0) | |
470 | src = "."; | |
471 | if ((host = strrchr(argv[i], '@')) == NULL) { | |
472 | host = argv[i]; | |
473 | suser = NULL; | |
474 | } else { | |
475 | *host++ = 0; | |
476 | suser = argv[i]; | |
477 | if (*suser == '\0') | |
478 | suser = pwd->pw_name; | |
479 | } | |
480 | host = cleanhostname(host); | |
481 | len = strlen(src) + CMDNEEDS + 20; | |
482 | bp = xmalloc(len); | |
483 | (void) snprintf(bp, len, "%s -f %s", cmd, src); | |
484 | if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) { | |
485 | (void) xfree(bp); | |
486 | ++errs; | |
487 | continue; | |
488 | } | |
489 | xfree(bp); | |
490 | sink(1, argv + argc - 1); | |
491 | (void) close(remin); | |
492 | remin = remout = -1; | |
493 | } | |
494 | } | |
495 | ||
496 | void | |
497 | source(argc, argv) | |
498 | int argc; | |
499 | char *argv[]; | |
500 | { | |
501 | struct stat stb; | |
502 | static BUF buffer; | |
503 | BUF *bp; | |
504 | off_t i, amt, result, statbytes; | |
505 | int fd, haderr, indx; | |
506 | char *last, *name, buf[2048]; | |
507 | int len; | |
508 | ||
509 | for (indx = 0; indx < argc; ++indx) { | |
510 | name = argv[indx]; | |
511 | statbytes = 0; | |
512 | len = strlen(name); | |
513 | while (len > 1 && name[len-1] == '/') | |
514 | name[--len] = '\0'; | |
515 | if (strchr(name, '\n') != NULL) { | |
516 | run_err("%s: skipping, filename contains a newline", | |
517 | name); | |
518 | goto next; | |
519 | } | |
520 | if ((fd = open(name, O_RDONLY, 0)) < 0) | |
521 | goto syserr; | |
522 | if (fstat(fd, &stb) < 0) { | |
523 | syserr: run_err("%s: %s", name, strerror(errno)); | |
524 | goto next; | |
525 | } | |
526 | switch (stb.st_mode & S_IFMT) { | |
527 | case S_IFREG: | |
528 | break; | |
529 | case S_IFDIR: | |
530 | if (iamrecursive) { | |
531 | rsource(name, &stb); | |
532 | goto next; | |
533 | } | |
534 | /* FALLTHROUGH */ | |
535 | default: | |
536 | run_err("%s: not a regular file", name); | |
537 | goto next; | |
538 | } | |
539 | if ((last = strrchr(name, '/')) == NULL) | |
540 | last = name; | |
541 | else | |
542 | ++last; | |
543 | curfile = last; | |
544 | if (pflag) { | |
545 | /* | |
546 | * Make it compatible with possible future | |
547 | * versions expecting microseconds. | |
548 | */ | |
549 | (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", | |
550 | (u_long) stb.st_mtime, | |
551 | (u_long) stb.st_atime); | |
552 | (void) atomicio(write, remout, buf, strlen(buf)); | |
553 | if (response() < 0) | |
554 | goto next; | |
555 | } | |
556 | #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) | |
557 | snprintf(buf, sizeof buf, "C%04o %lld %s\n", | |
558 | (u_int) (stb.st_mode & FILEMODEMASK), | |
559 | (int64_t)stb.st_size, last); | |
560 | if (verbose_mode) { | |
561 | fprintf(stderr, "Sending file modes: %s", buf); | |
562 | } | |
563 | (void) atomicio(write, remout, buf, strlen(buf)); | |
564 | if (response() < 0) | |
565 | goto next; | |
566 | if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { | |
567 | next: (void) close(fd); | |
568 | continue; | |
569 | } | |
570 | if (showprogress) | |
571 | start_progress_meter(curfile, stb.st_size, &statbytes); | |
572 | /* Keep writing after an error so that we stay sync'd up. */ | |
573 | for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { | |
574 | amt = bp->cnt; | |
575 | if (i + amt > stb.st_size) | |
576 | amt = stb.st_size - i; | |
577 | if (!haderr) { | |
578 | result = atomicio(read, fd, bp->buf, amt); | |
579 | if (result != amt) | |
580 | haderr = result >= 0 ? EIO : errno; | |
581 | } | |
582 | if (haderr) | |
583 | (void) atomicio(write, remout, bp->buf, amt); | |
584 | else { | |
585 | result = atomicio(write, remout, bp->buf, amt); | |
586 | if (result != amt) | |
587 | haderr = result >= 0 ? EIO : errno; | |
588 | statbytes += result; | |
589 | } | |
590 | if (limitbw) | |
591 | bwlimit(amt); | |
592 | } | |
593 | if (showprogress) | |
594 | stop_progress_meter(); | |
595 | ||
596 | if (close(fd) < 0 && !haderr) | |
597 | haderr = errno; | |
598 | if (!haderr) | |
599 | (void) atomicio(write, remout, "", 1); | |
600 | else | |
601 | run_err("%s: %s", name, strerror(haderr)); | |
602 | (void) response(); | |
603 | } | |
604 | } | |
605 | ||
606 | void | |
607 | rsource(name, statp) | |
608 | char *name; | |
609 | struct stat *statp; | |
610 | { | |
611 | DIR *dirp; | |
612 | struct dirent *dp; | |
613 | char *last, *vect[1], path[1100]; | |
614 | ||
615 | if (!(dirp = opendir(name))) { | |
616 | run_err("%s: %s", name, strerror(errno)); | |
617 | return; | |
618 | } | |
619 | last = strrchr(name, '/'); | |
620 | if (last == 0) | |
621 | last = name; | |
622 | else | |
623 | last++; | |
624 | if (pflag) { | |
625 | (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", | |
626 | (u_long) statp->st_mtime, | |
627 | (u_long) statp->st_atime); | |
628 | (void) atomicio(write, remout, path, strlen(path)); | |
629 | if (response() < 0) { | |
630 | closedir(dirp); | |
631 | return; | |
632 | } | |
633 | } | |
634 | (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", | |
635 | (u_int) (statp->st_mode & FILEMODEMASK), 0, last); | |
636 | if (verbose_mode) | |
637 | fprintf(stderr, "Entering directory: %s", path); | |
638 | (void) atomicio(write, remout, path, strlen(path)); | |
639 | if (response() < 0) { | |
640 | closedir(dirp); | |
641 | return; | |
642 | } | |
643 | while ((dp = readdir(dirp)) != NULL) { | |
644 | if (dp->d_ino == 0) | |
645 | continue; | |
646 | if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) | |
647 | continue; | |
648 | if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { | |
649 | run_err("%s/%s: name too long", name, dp->d_name); | |
650 | continue; | |
651 | } | |
652 | (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); | |
653 | vect[0] = path; | |
654 | source(1, vect); | |
655 | } | |
656 | (void) closedir(dirp); | |
657 | (void) atomicio(write, remout, "E\n", 2); | |
658 | (void) response(); | |
659 | } | |
660 | ||
661 | void | |
662 | bwlimit(int amount) | |
663 | { | |
664 | static struct timeval bwstart, bwend; | |
665 | static int lamt, thresh = 16384; | |
666 | u_int64_t wait; | |
667 | struct timespec ts, rm; | |
668 | ||
669 | if (!timerisset(&bwstart)) { | |
670 | gettimeofday(&bwstart, NULL); | |
671 | return; | |
672 | } | |
673 | ||
674 | lamt += amount; | |
675 | if (lamt < thresh) | |
676 | return; | |
677 | ||
678 | gettimeofday(&bwend, NULL); | |
679 | timersub(&bwend, &bwstart, &bwend); | |
680 | if (!timerisset(&bwend)) | |
681 | return; | |
682 | ||
683 | lamt *= 8; | |
684 | wait = (double)1000000L * lamt / limitbw; | |
685 | ||
686 | bwstart.tv_sec = wait / 1000000L; | |
687 | bwstart.tv_usec = wait % 1000000L; | |
688 | ||
689 | if (timercmp(&bwstart, &bwend, >)) { | |
690 | timersub(&bwstart, &bwend, &bwend); | |
691 | ||
692 | /* Adjust the wait time */ | |
693 | if (bwend.tv_sec) { | |
694 | thresh /= 2; | |
695 | if (thresh < 2048) | |
696 | thresh = 2048; | |
697 | } else if (bwend.tv_usec < 100) { | |
698 | thresh *= 2; | |
699 | if (thresh > 32768) | |
700 | thresh = 32768; | |
701 | } | |
702 | ||
703 | TIMEVAL_TO_TIMESPEC(&bwend, &ts); | |
704 | while (nanosleep(&ts, &rm) == -1) { | |
705 | if (errno != EINTR) | |
706 | break; | |
707 | ts = rm; | |
708 | } | |
709 | } | |
710 | ||
711 | lamt = 0; | |
712 | gettimeofday(&bwstart, NULL); | |
713 | } | |
714 | ||
715 | void | |
716 | sink(argc, argv) | |
717 | int argc; | |
718 | 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, j; | |
727 | int amt, count, exists, first, mask, mode, ofd, omode; | |
728 | off_t size, statbytes; | |
729 | int setimes, targisdir, wrerrno = 0; | |
730 | char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; | |
731 | struct timeval tv[2]; | |
732 | ||
733 | #define atime tv[0] | |
734 | #define mtime tv[1] | |
735 | #define SCREWUP(str) do { why = str; goto screwup; } while (0) | |
736 | ||
737 | setimes = targisdir = 0; | |
738 | mask = umask(0); | |
739 | if (!pflag) | |
740 | (void) umask(mask); | |
741 | if (argc != 1) { | |
742 | run_err("ambiguous target"); | |
743 | exit(1); | |
744 | } | |
745 | targ = *argv; | |
746 | if (targetshouldbedirectory) | |
747 | verifydir(targ); | |
748 | ||
749 | (void) atomicio(write, remout, "", 1); | |
750 | if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) | |
751 | targisdir = 1; | |
752 | for (first = 1;; first = 0) { | |
753 | cp = buf; | |
754 | if (atomicio(read, remin, cp, 1) <= 0) | |
755 | return; | |
756 | if (*cp++ == '\n') | |
757 | SCREWUP("unexpected <newline>"); | |
758 | do { | |
759 | if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) | |
760 | SCREWUP("lost connection"); | |
761 | *cp++ = ch; | |
762 | } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); | |
763 | *cp = 0; | |
764 | ||
765 | if (buf[0] == '\01' || buf[0] == '\02') { | |
766 | if (iamremote == 0) | |
767 | (void) atomicio(write, STDERR_FILENO, | |
768 | buf + 1, strlen(buf + 1)); | |
769 | if (buf[0] == '\02') | |
770 | exit(1); | |
771 | ++errs; | |
772 | continue; | |
773 | } | |
774 | if (buf[0] == 'E') { | |
775 | (void) atomicio(write, remout, "", 1); | |
776 | return; | |
777 | } | |
778 | if (ch == '\n') | |
779 | *--cp = 0; | |
780 | ||
781 | cp = buf; | |
782 | if (*cp == 'T') { | |
783 | setimes++; | |
784 | cp++; | |
785 | mtime.tv_sec = strtol(cp, &cp, 10); | |
786 | if (!cp || *cp++ != ' ') | |
787 | SCREWUP("mtime.sec not delimited"); | |
788 | mtime.tv_usec = strtol(cp, &cp, 10); | |
789 | if (!cp || *cp++ != ' ') | |
790 | SCREWUP("mtime.usec not delimited"); | |
791 | atime.tv_sec = strtol(cp, &cp, 10); | |
792 | if (!cp || *cp++ != ' ') | |
793 | SCREWUP("atime.sec not delimited"); | |
794 | atime.tv_usec = strtol(cp, &cp, 10); | |
795 | if (!cp || *cp++ != '\0') | |
796 | SCREWUP("atime.usec not delimited"); | |
797 | (void) atomicio(write, remout, "", 1); | |
798 | continue; | |
799 | } | |
800 | if (*cp != 'C' && *cp != 'D') { | |
801 | /* | |
802 | * Check for the case "rcp remote:foo\* local:bar". | |
803 | * In this case, the line "No match." can be returned | |
804 | * by the shell before the rcp command on the remote is | |
805 | * executed so the ^Aerror_message convention isn't | |
806 | * followed. | |
807 | */ | |
808 | if (first) { | |
809 | run_err("%s", cp); | |
810 | exit(1); | |
811 | } | |
812 | SCREWUP("expected control record"); | |
813 | } | |
814 | mode = 0; | |
815 | for (++cp; cp < buf + 5; cp++) { | |
816 | if (*cp < '0' || *cp > '7') | |
817 | SCREWUP("bad mode"); | |
818 | mode = (mode << 3) | (*cp - '0'); | |
819 | } | |
820 | if (*cp++ != ' ') | |
821 | SCREWUP("mode not delimited"); | |
822 | ||
823 | for (size = 0; isdigit(*cp);) | |
824 | size = size * 10 + (*cp++ - '0'); | |
825 | if (*cp++ != ' ') | |
826 | SCREWUP("size not delimited"); | |
827 | if (targisdir) { | |
828 | static char *namebuf; | |
829 | static int cursize; | |
830 | size_t need; | |
831 | ||
832 | need = strlen(targ) + strlen(cp) + 250; | |
833 | if (need > cursize) { | |
834 | if (namebuf) | |
835 | xfree(namebuf); | |
836 | namebuf = xmalloc(need); | |
837 | cursize = need; | |
838 | } | |
839 | (void) snprintf(namebuf, need, "%s%s%s", targ, | |
840 | strcmp(targ, "/") ? "/" : "", cp); | |
841 | np = namebuf; | |
842 | } else | |
843 | np = targ; | |
844 | curfile = cp; | |
845 | exists = stat(np, &stb) == 0; | |
846 | if (buf[0] == 'D') { | |
847 | int mod_flag = pflag; | |
848 | if (exists) { | |
849 | if (!S_ISDIR(stb.st_mode)) { | |
850 | errno = ENOTDIR; | |
851 | goto bad; | |
852 | } | |
853 | if (pflag) | |
854 | (void) chmod(np, mode); | |
855 | } else { | |
856 | /* Handle copying from a read-only | |
857 | directory */ | |
858 | mod_flag = 1; | |
859 | if (mkdir(np, mode | S_IRWXU) < 0) | |
860 | goto bad; | |
861 | } | |
862 | vect[0] = xstrdup(np); | |
863 | sink(1, vect); | |
864 | if (setimes) { | |
865 | setimes = 0; | |
866 | if (utimes(vect[0], tv) < 0) | |
867 | run_err("%s: set times: %s", | |
868 | vect[0], strerror(errno)); | |
869 | } | |
870 | if (mod_flag) | |
871 | (void) chmod(vect[0], mode); | |
872 | if (vect[0]) | |
873 | xfree(vect[0]); | |
874 | continue; | |
875 | } | |
876 | omode = mode; | |
877 | mode |= S_IWRITE; | |
878 | if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { | |
879 | bad: run_err("%s: %s", np, strerror(errno)); | |
880 | continue; | |
881 | } | |
882 | (void) atomicio(write, remout, "", 1); | |
883 | if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) { | |
884 | (void) close(ofd); | |
885 | continue; | |
886 | } | |
887 | cp = bp->buf; | |
888 | wrerr = NO; | |
889 | ||
890 | statbytes = 0; | |
891 | if (showprogress) | |
892 | start_progress_meter(curfile, size, &statbytes); | |
893 | for (count = i = 0; i < size; i += 4096) { | |
894 | amt = 4096; | |
895 | if (i + amt > size) | |
896 | amt = size - i; | |
897 | count += amt; | |
898 | do { | |
899 | j = read(remin, cp, amt); | |
900 | if (j == -1 && (errno == EINTR || | |
901 | errno == EAGAIN)) { | |
902 | continue; | |
903 | } else if (j <= 0) { | |
904 | run_err("%s", j ? strerror(errno) : | |
905 | "dropped connection"); | |
906 | exit(1); | |
907 | } | |
908 | amt -= j; | |
909 | cp += j; | |
910 | statbytes += j; | |
911 | } while (amt > 0); | |
912 | ||
913 | if (limitbw) | |
914 | bwlimit(4096); | |
915 | ||
916 | if (count == bp->cnt) { | |
917 | /* Keep reading so we stay sync'd up. */ | |
918 | if (wrerr == NO) { | |
919 | j = atomicio(write, ofd, bp->buf, count); | |
920 | if (j != count) { | |
921 | wrerr = YES; | |
922 | wrerrno = j >= 0 ? EIO : errno; | |
923 | } | |
924 | } | |
925 | count = 0; | |
926 | cp = bp->buf; | |
927 | } | |
928 | } | |
929 | if (showprogress) | |
930 | stop_progress_meter(); | |
931 | if (count != 0 && wrerr == NO && | |
932 | (j = atomicio(write, ofd, bp->buf, count)) != count) { | |
933 | wrerr = YES; | |
934 | wrerrno = j >= 0 ? EIO : errno; | |
935 | } | |
936 | if (wrerr == NO && ftruncate(ofd, size) != 0) { | |
937 | run_err("%s: truncate: %s", np, strerror(errno)); | |
938 | wrerr = DISPLAYED; | |
939 | } | |
940 | if (pflag) { | |
941 | if (exists || omode != mode) | |
942 | #ifdef HAVE_FCHMOD | |
943 | if (fchmod(ofd, omode)) | |
944 | #else /* HAVE_FCHMOD */ | |
945 | if (chmod(np, omode)) | |
946 | #endif /* HAVE_FCHMOD */ | |
947 | run_err("%s: set mode: %s", | |
948 | np, strerror(errno)); | |
949 | } else { | |
950 | if (!exists && omode != mode) | |
951 | #ifdef HAVE_FCHMOD | |
952 | if (fchmod(ofd, omode & ~mask)) | |
953 | #else /* HAVE_FCHMOD */ | |
954 | if (chmod(np, omode & ~mask)) | |
955 | #endif /* HAVE_FCHMOD */ | |
956 | run_err("%s: set mode: %s", | |
957 | np, strerror(errno)); | |
958 | } | |
959 | if (close(ofd) == -1) { | |
960 | wrerr = YES; | |
961 | wrerrno = errno; | |
962 | } | |
963 | (void) response(); | |
964 | if (setimes && wrerr == NO) { | |
965 | setimes = 0; | |
966 | if (utimes(np, tv) < 0) { | |
967 | run_err("%s: set times: %s", | |
968 | np, strerror(errno)); | |
969 | wrerr = DISPLAYED; | |
970 | } | |
971 | } | |
972 | switch (wrerr) { | |
973 | case YES: | |
974 | run_err("%s: %s", np, strerror(wrerrno)); | |
975 | break; | |
976 | case NO: | |
977 | (void) atomicio(write, remout, "", 1); | |
978 | break; | |
979 | case DISPLAYED: | |
980 | break; | |
981 | } | |
982 | } | |
983 | screwup: | |
984 | run_err("protocol error: %s", why); | |
985 | exit(1); | |
986 | } | |
987 | ||
988 | int | |
989 | response(void) | |
990 | { | |
991 | char ch, *cp, resp, rbuf[2048]; | |
992 | ||
993 | if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) | |
994 | lostconn(0); | |
995 | ||
996 | cp = rbuf; | |
997 | switch (resp) { | |
998 | case 0: /* ok */ | |
999 | return (0); | |
1000 | default: | |
1001 | *cp++ = resp; | |
1002 | /* FALLTHROUGH */ | |
1003 | case 1: /* error, followed by error msg */ | |
1004 | case 2: /* fatal error, "" */ | |
1005 | do { | |
1006 | if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) | |
1007 | lostconn(0); | |
1008 | *cp++ = ch; | |
1009 | } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); | |
1010 | ||
1011 | if (!iamremote) | |
1012 | (void) atomicio(write, STDERR_FILENO, rbuf, cp - rbuf); | |
1013 | ++errs; | |
1014 | if (resp == 1) | |
1015 | return (-1); | |
1016 | exit(1); | |
1017 | } | |
1018 | /* NOTREACHED */ | |
1019 | } | |
1020 | ||
1021 | void | |
1022 | usage(void) | |
1023 | { | |
1024 | (void) fprintf(stderr, | |
1025 | "usage: scp [-pqrvBC1246] [-F config] [-S program] [-P port]\n" | |
1026 | " [-c cipher] [-i identity] [-l limit] [-o option]\n" | |
1027 | " [[user@]host1:]file1 [...] [[user@]host2:]file2\n"); | |
1028 | exit(1); | |
1029 | } | |
1030 | ||
1031 | void | |
1032 | run_err(const char *fmt,...) | |
1033 | { | |
1034 | static FILE *fp; | |
1035 | va_list ap; | |
1036 | ||
1037 | ++errs; | |
1038 | if (fp == NULL && !(fp = fdopen(remout, "w"))) | |
1039 | return; | |
1040 | (void) fprintf(fp, "%c", 0x01); | |
1041 | (void) fprintf(fp, "scp: "); | |
1042 | va_start(ap, fmt); | |
1043 | (void) vfprintf(fp, fmt, ap); | |
1044 | va_end(ap); | |
1045 | (void) fprintf(fp, "\n"); | |
1046 | (void) fflush(fp); | |
1047 | ||
1048 | if (!iamremote) { | |
1049 | va_start(ap, fmt); | |
1050 | vfprintf(stderr, fmt, ap); | |
1051 | va_end(ap); | |
1052 | fprintf(stderr, "\n"); | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | void | |
1057 | verifydir(cp) | |
1058 | char *cp; | |
1059 | { | |
1060 | struct stat stb; | |
1061 | ||
1062 | if (!stat(cp, &stb)) { | |
1063 | if (S_ISDIR(stb.st_mode)) | |
1064 | return; | |
1065 | errno = ENOTDIR; | |
1066 | } | |
1067 | run_err("%s: %s", cp, strerror(errno)); | |
1068 | exit(1); | |
1069 | } | |
1070 | ||
1071 | int | |
1072 | okname(cp0) | |
1073 | char *cp0; | |
1074 | { | |
1075 | int c; | |
1076 | char *cp; | |
1077 | ||
1078 | cp = cp0; | |
1079 | do { | |
1080 | c = (int)*cp; | |
1081 | if (c & 0200) | |
1082 | goto bad; | |
1083 | if (!isalpha(c) && !isdigit(c)) { | |
1084 | switch (c) { | |
1085 | case '\'': | |
1086 | case '"': | |
1087 | case '`': | |
1088 | case ' ': | |
1089 | case '#': | |
1090 | goto bad; | |
1091 | default: | |
1092 | break; | |
1093 | } | |
1094 | } | |
1095 | } while (*++cp); | |
1096 | return (1); | |
1097 | ||
1098 | bad: fprintf(stderr, "%s: invalid user name\n", cp0); | |
1099 | return (0); | |
1100 | } | |
1101 | ||
1102 | BUF * | |
1103 | allocbuf(bp, fd, blksize) | |
1104 | BUF *bp; | |
1105 | int fd, blksize; | |
1106 | { | |
1107 | size_t size; | |
1108 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE | |
1109 | struct stat stb; | |
1110 | ||
1111 | if (fstat(fd, &stb) < 0) { | |
1112 | run_err("fstat: %s", strerror(errno)); | |
1113 | return (0); | |
1114 | } | |
1115 | size = roundup(stb.st_blksize, blksize); | |
1116 | if (size == 0) | |
1117 | size = blksize; | |
1118 | #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ | |
1119 | size = blksize; | |
1120 | #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ | |
1121 | if (bp->cnt >= size) | |
1122 | return (bp); | |
1123 | if (bp->buf == NULL) | |
1124 | bp->buf = xmalloc(size); | |
1125 | else | |
1126 | bp->buf = xrealloc(bp->buf, size); | |
1127 | memset(bp->buf, 0, size); | |
1128 | bp->cnt = size; | |
1129 | return (bp); | |
1130 | } | |
1131 | ||
1132 | void | |
1133 | lostconn(signo) | |
1134 | int signo; | |
1135 | { | |
1136 | if (!iamremote) | |
1137 | write(STDERR_FILENO, "lost connection\n", 16); | |
1138 | if (signo) | |
1139 | _exit(1); | |
1140 | else | |
1141 | exit(1); | |
1142 | } |