4c7f0d61 |
1 | /* |
2 | * psftp.c: front end for PSFTP. |
3 | */ |
4 | |
4a8fc3c4 |
5 | #include <windows.h> |
6 | |
4c7f0d61 |
7 | #include <stdio.h> |
8 | #include <stdlib.h> |
f9e162aa |
9 | #include <stdarg.h> |
4c7f0d61 |
10 | #include <assert.h> |
d92624dc |
11 | #include <limits.h> |
4c7f0d61 |
12 | |
4a8fc3c4 |
13 | #define PUTTY_DO_GLOBALS |
14 | #include "putty.h" |
15 | #include "storage.h" |
16 | #include "ssh.h" |
4c7f0d61 |
17 | #include "sftp.h" |
18 | #include "int64.h" |
19 | |
5471d09a |
20 | /* |
21 | * Since SFTP is a request-response oriented protocol, it requires |
22 | * no buffer management: when we send data, we stop and wait for an |
23 | * acknowledgement _anyway_, and so we can't possibly overfill our |
24 | * send buffer. |
25 | */ |
26 | |
fa3db767 |
27 | static int psftp_connect(char *userhost, char *user, int portnumber); |
28 | static void do_sftp_init(void); |
29 | |
4c7f0d61 |
30 | /* ---------------------------------------------------------------------- |
4c7f0d61 |
31 | * sftp client state. |
32 | */ |
33 | |
34 | char *pwd, *homedir; |
35 | |
36 | /* ---------------------------------------------------------------------- |
37 | * Higher-level helper functions used in commands. |
38 | */ |
39 | |
40 | /* |
f9e162aa |
41 | * Attempt to canonify a pathname starting from the pwd. If |
42 | * canonification fails, at least fall back to returning a _valid_ |
43 | * pathname (though it may be ugly, eg /home/simon/../foobar). |
4c7f0d61 |
44 | */ |
32874aea |
45 | char *canonify(char *name) |
46 | { |
f9e162aa |
47 | char *fullname, *canonname; |
4a8fc3c4 |
48 | |
f9e162aa |
49 | if (name[0] == '/') { |
50 | fullname = dupstr(name); |
51 | } else { |
4a8fc3c4 |
52 | char *slash; |
32874aea |
53 | if (pwd[strlen(pwd) - 1] == '/') |
4a8fc3c4 |
54 | slash = ""; |
55 | else |
56 | slash = "/"; |
57 | fullname = dupcat(pwd, slash, name, NULL); |
f9e162aa |
58 | } |
4a8fc3c4 |
59 | |
60 | canonname = fxp_realpath(fullname); |
61 | |
f9e162aa |
62 | if (canonname) { |
63 | sfree(fullname); |
64 | return canonname; |
50d7e054 |
65 | } else { |
32874aea |
66 | /* |
67 | * Attempt number 2. Some FXP_REALPATH implementations |
68 | * (glibc-based ones, in particular) require the _whole_ |
69 | * path to point to something that exists, whereas others |
70 | * (BSD-based) only require all but the last component to |
71 | * exist. So if the first call failed, we should strip off |
72 | * everything from the last slash onwards and try again, |
73 | * then put the final component back on. |
74 | * |
75 | * Special cases: |
76 | * |
77 | * - if the last component is "/." or "/..", then we don't |
78 | * bother trying this because there's no way it can work. |
79 | * |
80 | * - if the thing actually ends with a "/", we remove it |
81 | * before we start. Except if the string is "/" itself |
82 | * (although I can't see why we'd have got here if so, |
83 | * because surely "/" would have worked the first |
84 | * time?), in which case we don't bother. |
85 | * |
86 | * - if there's no slash in the string at all, give up in |
87 | * confusion (we expect at least one because of the way |
88 | * we constructed the string). |
89 | */ |
90 | |
91 | int i; |
92 | char *returnname; |
93 | |
94 | i = strlen(fullname); |
95 | if (i > 2 && fullname[i - 1] == '/') |
96 | fullname[--i] = '\0'; /* strip trailing / unless at pos 0 */ |
97 | while (i > 0 && fullname[--i] != '/'); |
98 | |
99 | /* |
100 | * Give up on special cases. |
101 | */ |
102 | if (fullname[i] != '/' || /* no slash at all */ |
103 | !strcmp(fullname + i, "/.") || /* ends in /. */ |
104 | !strcmp(fullname + i, "/..") || /* ends in /.. */ |
105 | !strcmp(fullname, "/")) { |
106 | return fullname; |
107 | } |
108 | |
109 | /* |
110 | * Now i points at the slash. Deal with the final special |
111 | * case i==0 (ie the whole path was "/nonexistentfile"). |
112 | */ |
113 | fullname[i] = '\0'; /* separate the string */ |
114 | if (i == 0) { |
115 | canonname = fxp_realpath("/"); |
116 | } else { |
117 | canonname = fxp_realpath(fullname); |
118 | } |
119 | |
120 | if (!canonname) |
121 | return fullname; /* even that failed; give up */ |
122 | |
123 | /* |
124 | * We have a canonical name for all but the last path |
125 | * component. Concatenate the last component and return. |
126 | */ |
127 | returnname = dupcat(canonname, |
128 | canonname[strlen(canonname) - 1] == |
129 | '/' ? "" : "/", fullname + i + 1, NULL); |
130 | sfree(fullname); |
131 | sfree(canonname); |
132 | return returnname; |
50d7e054 |
133 | } |
4c7f0d61 |
134 | } |
135 | |
dcf8495c |
136 | /* |
137 | * Return a pointer to the portion of str that comes after the last |
138 | * slash (or backslash or colon, if `local' is TRUE). |
139 | */ |
140 | static char *stripslashes(char *str, int local) |
141 | { |
142 | char *p; |
143 | |
144 | if (local) { |
145 | p = strchr(str, ':'); |
146 | if (p) str = p+1; |
147 | } |
148 | |
149 | p = strrchr(str, '/'); |
150 | if (p) str = p+1; |
151 | |
152 | if (local) { |
153 | p = strrchr(str, '\\'); |
154 | if (p) str = p+1; |
155 | } |
156 | |
157 | return str; |
158 | } |
159 | |
4c7f0d61 |
160 | /* ---------------------------------------------------------------------- |
161 | * Actual sftp commands. |
162 | */ |
163 | struct sftp_command { |
164 | char **words; |
165 | int nwords, wordssize; |
32874aea |
166 | int (*obey) (struct sftp_command *); /* returns <0 to quit */ |
4c7f0d61 |
167 | }; |
168 | |
32874aea |
169 | int sftp_cmd_null(struct sftp_command *cmd) |
170 | { |
df49ff19 |
171 | return 1; /* success */ |
4c7f0d61 |
172 | } |
173 | |
32874aea |
174 | int sftp_cmd_unknown(struct sftp_command *cmd) |
175 | { |
4c7f0d61 |
176 | printf("psftp: unknown command \"%s\"\n", cmd->words[0]); |
df49ff19 |
177 | return 0; /* failure */ |
4c7f0d61 |
178 | } |
179 | |
32874aea |
180 | int sftp_cmd_quit(struct sftp_command *cmd) |
181 | { |
4c7f0d61 |
182 | return -1; |
183 | } |
184 | |
185 | /* |
186 | * List a directory. If no arguments are given, list pwd; otherwise |
187 | * list the directory given in words[1]. |
188 | */ |
32874aea |
189 | static int sftp_ls_compare(const void *av, const void *bv) |
190 | { |
191 | const struct fxp_name *a = (const struct fxp_name *) av; |
192 | const struct fxp_name *b = (const struct fxp_name *) bv; |
4c7f0d61 |
193 | return strcmp(a->filename, b->filename); |
194 | } |
32874aea |
195 | int sftp_cmd_ls(struct sftp_command *cmd) |
196 | { |
4c7f0d61 |
197 | struct fxp_handle *dirh; |
198 | struct fxp_names *names; |
199 | struct fxp_name *ournames; |
200 | int nnames, namesize; |
201 | char *dir, *cdir; |
202 | int i; |
203 | |
fa3db767 |
204 | if (back == NULL) { |
205 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
206 | return 0; |
207 | } |
208 | |
4c7f0d61 |
209 | if (cmd->nwords < 2) |
210 | dir = "."; |
211 | else |
212 | dir = cmd->words[1]; |
213 | |
214 | cdir = canonify(dir); |
215 | if (!cdir) { |
216 | printf("%s: %s\n", dir, fxp_error()); |
217 | return 0; |
218 | } |
219 | |
220 | printf("Listing directory %s\n", cdir); |
221 | |
222 | dirh = fxp_opendir(cdir); |
223 | if (dirh == NULL) { |
224 | printf("Unable to open %s: %s\n", dir, fxp_error()); |
225 | } else { |
226 | nnames = namesize = 0; |
227 | ournames = NULL; |
228 | |
229 | while (1) { |
230 | |
231 | names = fxp_readdir(dirh); |
232 | if (names == NULL) { |
233 | if (fxp_error_type() == SSH_FX_EOF) |
234 | break; |
235 | printf("Reading directory %s: %s\n", dir, fxp_error()); |
236 | break; |
237 | } |
238 | if (names->nnames == 0) { |
239 | fxp_free_names(names); |
240 | break; |
241 | } |
242 | |
243 | if (nnames + names->nnames >= namesize) { |
244 | namesize += names->nnames + 128; |
32874aea |
245 | ournames = |
246 | srealloc(ournames, namesize * sizeof(*ournames)); |
4c7f0d61 |
247 | } |
248 | |
249 | for (i = 0; i < names->nnames; i++) |
250 | ournames[nnames++] = names->names[i]; |
251 | |
252 | names->nnames = 0; /* prevent free_names */ |
253 | fxp_free_names(names); |
254 | } |
255 | fxp_close(dirh); |
256 | |
257 | /* |
258 | * Now we have our filenames. Sort them by actual file |
259 | * name, and then output the longname parts. |
260 | */ |
261 | qsort(ournames, nnames, sizeof(*ournames), sftp_ls_compare); |
262 | |
263 | /* |
264 | * And print them. |
265 | */ |
266 | for (i = 0; i < nnames; i++) |
267 | printf("%s\n", ournames[i].longname); |
268 | } |
269 | |
270 | sfree(cdir); |
271 | |
df49ff19 |
272 | return 1; |
4c7f0d61 |
273 | } |
274 | |
275 | /* |
276 | * Change directories. We do this by canonifying the new name, then |
277 | * trying to OPENDIR it. Only if that succeeds do we set the new pwd. |
278 | */ |
32874aea |
279 | int sftp_cmd_cd(struct sftp_command *cmd) |
280 | { |
4c7f0d61 |
281 | struct fxp_handle *dirh; |
282 | char *dir; |
283 | |
fa3db767 |
284 | if (back == NULL) { |
285 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
286 | return 0; |
287 | } |
288 | |
4c7f0d61 |
289 | if (cmd->nwords < 2) |
f9e162aa |
290 | dir = dupstr(homedir); |
4c7f0d61 |
291 | else |
292 | dir = canonify(cmd->words[1]); |
293 | |
294 | if (!dir) { |
295 | printf("%s: %s\n", dir, fxp_error()); |
296 | return 0; |
297 | } |
298 | |
299 | dirh = fxp_opendir(dir); |
300 | if (!dirh) { |
301 | printf("Directory %s: %s\n", dir, fxp_error()); |
302 | sfree(dir); |
303 | return 0; |
304 | } |
305 | |
306 | fxp_close(dirh); |
307 | |
308 | sfree(pwd); |
309 | pwd = dir; |
310 | printf("Remote directory is now %s\n", pwd); |
311 | |
df49ff19 |
312 | return 1; |
4c7f0d61 |
313 | } |
314 | |
315 | /* |
4f2b387f |
316 | * Print current directory. Easy as pie. |
317 | */ |
318 | int sftp_cmd_pwd(struct sftp_command *cmd) |
319 | { |
fa3db767 |
320 | if (back == NULL) { |
321 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
322 | return 0; |
323 | } |
324 | |
4f2b387f |
325 | printf("Remote directory is %s\n", pwd); |
df49ff19 |
326 | return 1; |
4f2b387f |
327 | } |
328 | |
329 | /* |
d92624dc |
330 | * Get a file and save it at the local end. We have two very |
331 | * similar commands here: `get' and `reget', which differ in that |
332 | * `reget' checks for the existence of the destination file and |
333 | * starts from where a previous aborted transfer left off. |
4c7f0d61 |
334 | */ |
d92624dc |
335 | int sftp_general_get(struct sftp_command *cmd, int restart) |
32874aea |
336 | { |
4c7f0d61 |
337 | struct fxp_handle *fh; |
338 | char *fname, *outfname; |
339 | uint64 offset; |
340 | FILE *fp; |
df49ff19 |
341 | int ret; |
4c7f0d61 |
342 | |
fa3db767 |
343 | if (back == NULL) { |
344 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
345 | return 0; |
346 | } |
347 | |
4c7f0d61 |
348 | if (cmd->nwords < 2) { |
349 | printf("get: expects a filename\n"); |
350 | return 0; |
351 | } |
352 | |
353 | fname = canonify(cmd->words[1]); |
354 | if (!fname) { |
355 | printf("%s: %s\n", cmd->words[1], fxp_error()); |
356 | return 0; |
357 | } |
dcf8495c |
358 | outfname = (cmd->nwords == 2 ? |
359 | stripslashes(cmd->words[1], 0) : cmd->words[2]); |
4c7f0d61 |
360 | |
361 | fh = fxp_open(fname, SSH_FXF_READ); |
362 | if (!fh) { |
363 | printf("%s: %s\n", fname, fxp_error()); |
364 | sfree(fname); |
365 | return 0; |
366 | } |
d92624dc |
367 | |
368 | if (restart) { |
369 | fp = fopen(outfname, "rb+"); |
370 | } else { |
371 | fp = fopen(outfname, "wb"); |
372 | } |
373 | |
4c7f0d61 |
374 | if (!fp) { |
375 | printf("local: unable to open %s\n", outfname); |
32874aea |
376 | fxp_close(fh); |
4c7f0d61 |
377 | sfree(fname); |
378 | return 0; |
379 | } |
380 | |
d92624dc |
381 | if (restart) { |
382 | long posn; |
383 | fseek(fp, 0L, SEEK_END); |
384 | posn = ftell(fp); |
385 | printf("reget: restarting at file position %ld\n", posn); |
386 | offset = uint64_make(0, posn); |
387 | } else { |
388 | offset = uint64_make(0, 0); |
389 | } |
4c7f0d61 |
390 | |
d92624dc |
391 | printf("remote:%s => local:%s\n", fname, outfname); |
4c7f0d61 |
392 | |
393 | /* |
394 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
395 | * thus put up a progress bar. |
396 | */ |
df49ff19 |
397 | ret = 1; |
4c7f0d61 |
398 | while (1) { |
399 | char buffer[4096]; |
400 | int len; |
401 | int wpos, wlen; |
402 | |
403 | len = fxp_read(fh, buffer, offset, sizeof(buffer)); |
32874aea |
404 | if ((len == -1 && fxp_error_type() == SSH_FX_EOF) || len == 0) |
4c7f0d61 |
405 | break; |
406 | if (len == -1) { |
407 | printf("error while reading: %s\n", fxp_error()); |
df49ff19 |
408 | ret = 0; |
4c7f0d61 |
409 | break; |
410 | } |
32874aea |
411 | |
4c7f0d61 |
412 | wpos = 0; |
413 | while (wpos < len) { |
32874aea |
414 | wlen = fwrite(buffer, 1, len - wpos, fp); |
4c7f0d61 |
415 | if (wlen <= 0) { |
416 | printf("error while writing local file\n"); |
df49ff19 |
417 | ret = 0; |
4c7f0d61 |
418 | break; |
419 | } |
420 | wpos += wlen; |
421 | } |
df49ff19 |
422 | if (wpos < len) { /* we had an error */ |
423 | ret = 0; |
4c7f0d61 |
424 | break; |
df49ff19 |
425 | } |
4c7f0d61 |
426 | offset = uint64_add32(offset, len); |
427 | } |
428 | |
429 | fclose(fp); |
430 | fxp_close(fh); |
431 | sfree(fname); |
432 | |
df49ff19 |
433 | return ret; |
4c7f0d61 |
434 | } |
d92624dc |
435 | int sftp_cmd_get(struct sftp_command *cmd) |
436 | { |
437 | return sftp_general_get(cmd, 0); |
438 | } |
439 | int sftp_cmd_reget(struct sftp_command *cmd) |
440 | { |
441 | return sftp_general_get(cmd, 1); |
442 | } |
4c7f0d61 |
443 | |
444 | /* |
d92624dc |
445 | * Send a file and store it at the remote end. We have two very |
446 | * similar commands here: `put' and `reput', which differ in that |
447 | * `reput' checks for the existence of the destination file and |
448 | * starts from where a previous aborted transfer left off. |
4c7f0d61 |
449 | */ |
d92624dc |
450 | int sftp_general_put(struct sftp_command *cmd, int restart) |
32874aea |
451 | { |
4c7f0d61 |
452 | struct fxp_handle *fh; |
453 | char *fname, *origoutfname, *outfname; |
454 | uint64 offset; |
455 | FILE *fp; |
df49ff19 |
456 | int ret; |
4c7f0d61 |
457 | |
fa3db767 |
458 | if (back == NULL) { |
459 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
460 | return 0; |
461 | } |
462 | |
4c7f0d61 |
463 | if (cmd->nwords < 2) { |
464 | printf("put: expects a filename\n"); |
465 | return 0; |
466 | } |
467 | |
468 | fname = cmd->words[1]; |
dcf8495c |
469 | origoutfname = (cmd->nwords == 2 ? |
470 | stripslashes(cmd->words[1], 1) : cmd->words[2]); |
4c7f0d61 |
471 | outfname = canonify(origoutfname); |
f9e162aa |
472 | if (!outfname) { |
4c7f0d61 |
473 | printf("%s: %s\n", origoutfname, fxp_error()); |
474 | return 0; |
475 | } |
476 | |
477 | fp = fopen(fname, "rb"); |
478 | if (!fp) { |
479 | printf("local: unable to open %s\n", fname); |
4c7f0d61 |
480 | sfree(outfname); |
481 | return 0; |
482 | } |
d92624dc |
483 | if (restart) { |
484 | fh = fxp_open(outfname, |
485 | SSH_FXF_WRITE); |
486 | } else { |
487 | fh = fxp_open(outfname, |
488 | SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC); |
489 | } |
4c7f0d61 |
490 | if (!fh) { |
491 | printf("%s: %s\n", outfname, fxp_error()); |
492 | sfree(outfname); |
493 | return 0; |
494 | } |
495 | |
d92624dc |
496 | if (restart) { |
497 | char decbuf[30]; |
498 | struct fxp_attrs attrs; |
499 | if (!fxp_fstat(fh, &attrs)) { |
500 | printf("read size of %s: %s\n", outfname, fxp_error()); |
501 | sfree(outfname); |
502 | return 0; |
503 | } |
504 | if (!(attrs.flags & SSH_FILEXFER_ATTR_SIZE)) { |
505 | printf("read size of %s: size was not given\n", outfname); |
506 | sfree(outfname); |
507 | return 0; |
508 | } |
509 | offset = attrs.size; |
510 | uint64_decimal(offset, decbuf); |
511 | printf("reput: restarting at file position %s\n", decbuf); |
512 | if (uint64_compare(offset, uint64_make(0, LONG_MAX)) > 0) { |
513 | printf("reput: remote file is larger than we can deal with\n"); |
514 | sfree(outfname); |
515 | return 0; |
516 | } |
517 | if (fseek(fp, offset.lo, SEEK_SET) != 0) |
518 | fseek(fp, 0, SEEK_END); /* *shrug* */ |
519 | } else { |
520 | offset = uint64_make(0, 0); |
521 | } |
4c7f0d61 |
522 | |
d92624dc |
523 | printf("local:%s => remote:%s\n", fname, outfname); |
4c7f0d61 |
524 | |
525 | /* |
526 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
527 | * thus put up a progress bar. |
528 | */ |
df49ff19 |
529 | ret = 1; |
4c7f0d61 |
530 | while (1) { |
531 | char buffer[4096]; |
532 | int len; |
533 | |
f9e162aa |
534 | len = fread(buffer, 1, sizeof(buffer), fp); |
4c7f0d61 |
535 | if (len == -1) { |
536 | printf("error while reading local file\n"); |
df49ff19 |
537 | ret = 0; |
4c7f0d61 |
538 | break; |
539 | } else if (len == 0) { |
540 | break; |
541 | } |
f9e162aa |
542 | if (!fxp_write(fh, buffer, offset, len)) { |
4c7f0d61 |
543 | printf("error while writing: %s\n", fxp_error()); |
df49ff19 |
544 | ret = 0; |
4c7f0d61 |
545 | break; |
546 | } |
547 | offset = uint64_add32(offset, len); |
548 | } |
549 | |
550 | fxp_close(fh); |
551 | fclose(fp); |
552 | sfree(outfname); |
553 | |
df49ff19 |
554 | return ret; |
4c7f0d61 |
555 | } |
d92624dc |
556 | int sftp_cmd_put(struct sftp_command *cmd) |
557 | { |
558 | return sftp_general_put(cmd, 0); |
559 | } |
560 | int sftp_cmd_reput(struct sftp_command *cmd) |
561 | { |
562 | return sftp_general_put(cmd, 1); |
563 | } |
4c7f0d61 |
564 | |
9954aaa3 |
565 | int sftp_cmd_mkdir(struct sftp_command *cmd) |
566 | { |
567 | char *dir; |
568 | int result; |
569 | |
fa3db767 |
570 | if (back == NULL) { |
571 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
572 | return 0; |
573 | } |
9954aaa3 |
574 | |
575 | if (cmd->nwords < 2) { |
576 | printf("mkdir: expects a directory\n"); |
577 | return 0; |
578 | } |
579 | |
580 | dir = canonify(cmd->words[1]); |
581 | if (!dir) { |
582 | printf("%s: %s\n", dir, fxp_error()); |
583 | return 0; |
584 | } |
585 | |
586 | result = fxp_mkdir(dir); |
587 | if (!result) { |
588 | printf("mkdir %s: %s\n", dir, fxp_error()); |
589 | sfree(dir); |
590 | return 0; |
591 | } |
592 | |
d92624dc |
593 | sfree(dir); |
df49ff19 |
594 | return 1; |
9954aaa3 |
595 | } |
596 | |
597 | int sftp_cmd_rmdir(struct sftp_command *cmd) |
598 | { |
599 | char *dir; |
600 | int result; |
601 | |
fa3db767 |
602 | if (back == NULL) { |
603 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
604 | return 0; |
605 | } |
9954aaa3 |
606 | |
607 | if (cmd->nwords < 2) { |
608 | printf("rmdir: expects a directory\n"); |
609 | return 0; |
610 | } |
611 | |
612 | dir = canonify(cmd->words[1]); |
613 | if (!dir) { |
614 | printf("%s: %s\n", dir, fxp_error()); |
615 | return 0; |
616 | } |
617 | |
618 | result = fxp_rmdir(dir); |
619 | if (!result) { |
620 | printf("rmdir %s: %s\n", dir, fxp_error()); |
621 | sfree(dir); |
622 | return 0; |
623 | } |
624 | |
d92624dc |
625 | sfree(dir); |
df49ff19 |
626 | return 1; |
9954aaa3 |
627 | } |
628 | |
629 | int sftp_cmd_rm(struct sftp_command *cmd) |
630 | { |
631 | char *fname; |
632 | int result; |
633 | |
fa3db767 |
634 | if (back == NULL) { |
635 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
636 | return 0; |
637 | } |
638 | |
9954aaa3 |
639 | if (cmd->nwords < 2) { |
640 | printf("rm: expects a filename\n"); |
641 | return 0; |
642 | } |
643 | |
644 | fname = canonify(cmd->words[1]); |
645 | if (!fname) { |
646 | printf("%s: %s\n", fname, fxp_error()); |
647 | return 0; |
648 | } |
649 | |
d92624dc |
650 | result = fxp_remove(fname); |
9954aaa3 |
651 | if (!result) { |
652 | printf("rm %s: %s\n", fname, fxp_error()); |
653 | sfree(fname); |
654 | return 0; |
655 | } |
656 | |
d92624dc |
657 | sfree(fname); |
df49ff19 |
658 | return 1; |
d92624dc |
659 | } |
660 | |
661 | int sftp_cmd_mv(struct sftp_command *cmd) |
662 | { |
663 | char *srcfname, *dstfname; |
664 | int result; |
665 | |
fa3db767 |
666 | if (back == NULL) { |
667 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
668 | return 0; |
669 | } |
670 | |
d92624dc |
671 | if (cmd->nwords < 3) { |
672 | printf("mv: expects two filenames\n"); |
9954aaa3 |
673 | return 0; |
d92624dc |
674 | } |
675 | srcfname = canonify(cmd->words[1]); |
676 | if (!srcfname) { |
677 | printf("%s: %s\n", srcfname, fxp_error()); |
678 | return 0; |
679 | } |
680 | |
681 | dstfname = canonify(cmd->words[2]); |
682 | if (!dstfname) { |
683 | printf("%s: %s\n", dstfname, fxp_error()); |
684 | return 0; |
685 | } |
9954aaa3 |
686 | |
d92624dc |
687 | result = fxp_rename(srcfname, dstfname); |
688 | if (!result) { |
689 | char const *error = fxp_error(); |
690 | struct fxp_attrs attrs; |
691 | |
692 | /* |
693 | * The move might have failed because dstfname pointed at a |
694 | * directory. We check this possibility now: if dstfname |
695 | * _is_ a directory, we re-attempt the move by appending |
696 | * the basename of srcfname to dstfname. |
697 | */ |
698 | result = fxp_stat(dstfname, &attrs); |
699 | if (result && |
700 | (attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) && |
701 | (attrs.permissions & 0040000)) { |
702 | char *p; |
703 | char *newname, *newcanon; |
704 | printf("(destination %s is a directory)\n", dstfname); |
705 | p = srcfname + strlen(srcfname); |
706 | while (p > srcfname && p[-1] != '/') p--; |
707 | newname = dupcat(dstfname, "/", p, NULL); |
708 | newcanon = canonify(newname); |
709 | sfree(newname); |
710 | if (newcanon) { |
711 | sfree(dstfname); |
712 | dstfname = newcanon; |
713 | result = fxp_rename(srcfname, dstfname); |
714 | error = result ? NULL : fxp_error(); |
715 | } |
716 | } |
717 | if (error) { |
718 | printf("mv %s %s: %s\n", srcfname, dstfname, error); |
719 | sfree(srcfname); |
720 | sfree(dstfname); |
721 | return 0; |
722 | } |
723 | } |
724 | printf("%s -> %s\n", srcfname, dstfname); |
725 | |
726 | sfree(srcfname); |
727 | sfree(dstfname); |
df49ff19 |
728 | return 1; |
9954aaa3 |
729 | } |
730 | |
d92624dc |
731 | int sftp_cmd_chmod(struct sftp_command *cmd) |
732 | { |
733 | char *fname, *mode; |
734 | int result; |
735 | struct fxp_attrs attrs; |
736 | unsigned attrs_clr, attrs_xor, oldperms, newperms; |
737 | |
fa3db767 |
738 | if (back == NULL) { |
739 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
740 | return 0; |
741 | } |
742 | |
d92624dc |
743 | if (cmd->nwords < 3) { |
744 | printf("chmod: expects a mode specifier and a filename\n"); |
745 | return 0; |
746 | } |
747 | |
748 | /* |
749 | * Attempt to parse the mode specifier in cmd->words[1]. We |
750 | * don't support the full horror of Unix chmod; instead we |
751 | * support a much simpler syntax in which the user can either |
752 | * specify an octal number, or a comma-separated sequence of |
753 | * [ugoa]*[-+=][rwxst]+. (The initial [ugoa] sequence may |
754 | * _only_ be omitted if the only attribute mentioned is t, |
755 | * since all others require a user/group/other specification. |
756 | * Additionally, the s attribute may not be specified for any |
757 | * [ugoa] specifications other than exactly u or exactly g. |
758 | */ |
759 | attrs_clr = attrs_xor = 0; |
760 | mode = cmd->words[1]; |
761 | if (mode[0] >= '0' && mode[0] <= '9') { |
762 | if (mode[strspn(mode, "01234567")]) { |
763 | printf("chmod: numeric file modes should" |
764 | " contain digits 0-7 only\n"); |
765 | return 0; |
766 | } |
767 | attrs_clr = 07777; |
768 | sscanf(mode, "%o", &attrs_xor); |
769 | attrs_xor &= attrs_clr; |
770 | } else { |
771 | while (*mode) { |
772 | char *modebegin = mode; |
773 | unsigned subset, perms; |
774 | int action; |
775 | |
776 | subset = 0; |
777 | while (*mode && *mode != ',' && |
778 | *mode != '+' && *mode != '-' && *mode != '=') { |
779 | switch (*mode) { |
780 | case 'u': subset |= 04700; break; /* setuid, user perms */ |
781 | case 'g': subset |= 02070; break; /* setgid, group perms */ |
782 | case 'o': subset |= 00007; break; /* just other perms */ |
783 | case 'a': subset |= 06777; break; /* all of the above */ |
784 | default: |
785 | printf("chmod: file mode '%.*s' contains unrecognised" |
786 | " user/group/other specifier '%c'\n", |
787 | strcspn(modebegin, ","), modebegin, *mode); |
788 | return 0; |
789 | } |
790 | mode++; |
791 | } |
792 | if (!*mode || *mode == ',') { |
793 | printf("chmod: file mode '%.*s' is incomplete\n", |
794 | strcspn(modebegin, ","), modebegin); |
795 | return 0; |
796 | } |
797 | action = *mode++; |
798 | if (!*mode || *mode == ',') { |
799 | printf("chmod: file mode '%.*s' is incomplete\n", |
800 | strcspn(modebegin, ","), modebegin); |
801 | return 0; |
802 | } |
803 | perms = 0; |
804 | while (*mode && *mode != ',') { |
805 | switch (*mode) { |
806 | case 'r': perms |= 00444; break; |
807 | case 'w': perms |= 00222; break; |
808 | case 'x': perms |= 00111; break; |
809 | case 't': perms |= 01000; subset |= 01000; break; |
810 | case 's': |
811 | if ((subset & 06777) != 04700 && |
812 | (subset & 06777) != 02070) { |
813 | printf("chmod: file mode '%.*s': set[ug]id bit should" |
814 | " be used with exactly one of u or g only\n", |
815 | strcspn(modebegin, ","), modebegin); |
816 | return 0; |
817 | } |
818 | perms |= 06000; |
819 | break; |
820 | default: |
821 | printf("chmod: file mode '%.*s' contains unrecognised" |
822 | " permission specifier '%c'\n", |
823 | strcspn(modebegin, ","), modebegin, *mode); |
824 | return 0; |
825 | } |
826 | mode++; |
827 | } |
828 | if (!(subset & 06777) && (perms &~ subset)) { |
829 | printf("chmod: file mode '%.*s' contains no user/group/other" |
830 | " specifier and permissions other than 't' \n", |
831 | strcspn(modebegin, ","), modebegin, *mode); |
832 | return 0; |
833 | } |
834 | perms &= subset; |
835 | switch (action) { |
836 | case '+': |
837 | attrs_clr |= perms; |
838 | attrs_xor |= perms; |
839 | break; |
840 | case '-': |
841 | attrs_clr |= perms; |
842 | attrs_xor &= ~perms; |
843 | break; |
844 | case '=': |
845 | attrs_clr |= subset; |
846 | attrs_xor |= perms; |
847 | break; |
848 | } |
849 | if (*mode) mode++; /* eat comma */ |
850 | } |
851 | } |
852 | |
853 | fname = canonify(cmd->words[2]); |
854 | if (!fname) { |
855 | printf("%s: %s\n", fname, fxp_error()); |
856 | return 0; |
857 | } |
858 | |
859 | result = fxp_stat(fname, &attrs); |
860 | if (!result || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS)) { |
861 | printf("get attrs for %s: %s\n", fname, |
862 | result ? "file permissions not provided" : fxp_error()); |
863 | sfree(fname); |
864 | return 0; |
865 | } |
866 | |
867 | attrs.flags = SSH_FILEXFER_ATTR_PERMISSIONS; /* perms _only_ */ |
868 | oldperms = attrs.permissions & 07777; |
869 | attrs.permissions &= ~attrs_clr; |
870 | attrs.permissions ^= attrs_xor; |
871 | newperms = attrs.permissions & 07777; |
872 | |
873 | result = fxp_setstat(fname, attrs); |
874 | |
875 | if (!result) { |
876 | printf("set attrs for %s: %s\n", fname, fxp_error()); |
877 | sfree(fname); |
878 | return 0; |
879 | } |
880 | |
881 | printf("%s: %04o -> %04o\n", fname, oldperms, newperms); |
882 | |
883 | sfree(fname); |
df49ff19 |
884 | return 1; |
d92624dc |
885 | } |
9954aaa3 |
886 | |
fa3db767 |
887 | static int sftp_cmd_open(struct sftp_command *cmd) |
888 | { |
889 | if (back != NULL) { |
890 | printf("psftp: already connected\n"); |
891 | return 0; |
892 | } |
893 | |
894 | if (cmd->nwords < 2) { |
895 | printf("open: expects a host name\n"); |
896 | return 0; |
897 | } |
898 | |
899 | if (psftp_connect(cmd->words[1], NULL, 0)) { |
900 | back = NULL; /* connection is already closed */ |
901 | return -1; /* this is fatal */ |
902 | } |
903 | do_sftp_init(); |
df49ff19 |
904 | return 1; |
fa3db767 |
905 | } |
906 | |
bf5240cd |
907 | static int sftp_cmd_help(struct sftp_command *cmd); |
908 | |
4c7f0d61 |
909 | static struct sftp_cmd_lookup { |
910 | char *name; |
bf5240cd |
911 | /* |
912 | * For help purposes, there are two kinds of command: |
913 | * |
914 | * - primary commands, in which `longhelp' is non-NULL. In |
915 | * this case `shorthelp' is descriptive text, and `longhelp' |
916 | * is longer descriptive text intended to be printed after |
917 | * the command name. |
918 | * |
919 | * - alias commands, in which `longhelp' is NULL. In this case |
920 | * `shorthelp' is the name of a primary command, which |
921 | * contains the help that should double up for this command. |
922 | */ |
923 | char *shorthelp; |
924 | char *longhelp; |
32874aea |
925 | int (*obey) (struct sftp_command *); |
4c7f0d61 |
926 | } sftp_lookup[] = { |
927 | /* |
928 | * List of sftp commands. This is binary-searched so it MUST be |
929 | * in ASCII order. |
930 | */ |
32874aea |
931 | { |
bf5240cd |
932 | "bye", "finish your SFTP session", |
933 | "\n" |
934 | " Terminates your SFTP session and quits the PSFTP program.\n", |
935 | sftp_cmd_quit |
936 | }, |
937 | { |
938 | "cd", "change your remote working directory", |
939 | " [ <New working directory> ]\n" |
940 | " Change the remote working directory for your SFTP session.\n" |
941 | " If a new working directory is not supplied, you will be\n" |
942 | " returned to your home directory.\n", |
943 | sftp_cmd_cd |
944 | }, |
945 | { |
946 | "chmod", "change file permissions and modes", |
947 | " ( <octal-digits> | <modifiers> ) <filename>\n" |
948 | " Change the file permissions on a file or directory.\n" |
949 | " <octal-digits> can be any octal Unix permission specifier.\n" |
950 | " Alternatively, <modifiers> can include:\n" |
951 | " u+r make file readable by owning user\n" |
952 | " u+w make file writable by owning user\n" |
953 | " u+x make file executable by owning user\n" |
954 | " u-r make file not readable by owning user\n" |
955 | " [also u-w, u-x]\n" |
956 | " g+r make file readable by members of owning group\n" |
957 | " [also g+w, g+x, g-r, g-w, g-x]\n" |
958 | " o+r make file readable by all other users\n" |
959 | " [also o+w, o+x, o-r, o-w, o-x]\n" |
960 | " a+r make file readable by absolutely everybody\n" |
961 | " [also a+w, a+x, a-r, a-w, a-x]\n" |
962 | " u+s enable the Unix set-user-ID bit\n" |
963 | " u-s disable the Unix set-user-ID bit\n" |
964 | " g+s enable the Unix set-group-ID bit\n" |
965 | " g-s disable the Unix set-group-ID bit\n" |
966 | " +t enable the Unix \"sticky bit\"\n" |
967 | " You can give more than one modifier for the same user (\"g-rwx\"), and\n" |
968 | " more than one user for the same modifier (\"ug+w\"). You can\n" |
969 | " use commas to separate different modifiers (\"u+rwx,g+s\").\n", |
970 | sftp_cmd_chmod |
971 | }, |
972 | { |
973 | "del", "delete a file", |
974 | " <filename>\n" |
975 | " Delete a file.\n", |
976 | sftp_cmd_rm |
977 | }, |
978 | { |
979 | "delete", "delete a file", |
980 | "\n" |
981 | " Delete a file.\n", |
982 | sftp_cmd_rm |
983 | }, |
984 | { |
985 | "dir", "list contents of a remote directory", |
986 | " [ <directory-name> ]\n" |
987 | " List the contents of a specified directory on the server.\n" |
988 | " If <directory-name> is not given, the current working directory\n" |
989 | " will be listed.\n", |
990 | sftp_cmd_ls |
991 | }, |
992 | { |
993 | "exit", "bye", NULL, sftp_cmd_quit |
994 | }, |
995 | { |
996 | "get", "download a file from the server to your local machine", |
997 | " <filename> [ <local-filename> ]\n" |
998 | " Downloads a file on the server and stores it locally under\n" |
999 | " the same name, or under a different one if you supply the\n" |
1000 | " argument <local-filename>.\n", |
1001 | sftp_cmd_get |
1002 | }, |
1003 | { |
1004 | "help", "give help", |
1005 | " [ <command> [ <command> ... ] ]\n" |
1006 | " Give general help if no commands are specified.\n" |
1007 | " If one or more commands are specified, give specific help on\n" |
1008 | " those particular commands.\n", |
1009 | sftp_cmd_help |
1010 | }, |
1011 | { |
1012 | "ls", "dir", NULL, |
1013 | sftp_cmd_ls |
1014 | }, |
1015 | { |
1016 | "mkdir", "create a directory on the remote server", |
1017 | " <directory-name>\n" |
1018 | " Creates a directory with the given name on the server.\n", |
1019 | sftp_cmd_mkdir |
1020 | }, |
1021 | { |
1022 | "mv", "move or rename a file on the remote server", |
1023 | " <source-filename> <destination-filename>\n" |
1024 | " Moves or renames the file <source-filename> on the server,\n" |
1025 | " so that it is accessible under the name <destination-filename>.\n", |
1026 | sftp_cmd_mv |
1027 | }, |
1028 | { |
1029 | "put", "upload a file from your local machine to the server", |
1030 | " <filename> [ <remote-filename> ]\n" |
1031 | " Uploads a file to the server and stores it there under\n" |
1032 | " the same name, or under a different one if you supply the\n" |
1033 | " argument <remote-filename>.\n", |
1034 | sftp_cmd_put |
1035 | }, |
1036 | { |
fa3db767 |
1037 | "open", "connect to a host", |
1038 | " [<user>@]<hostname>\n" |
1039 | " Establishes an SFTP connection to a given host. Only usable\n" |
1040 | " when you did not already specify a host name on the command\n" |
1041 | " line.\n", |
1042 | sftp_cmd_open |
1043 | }, |
1044 | { |
4f2b387f |
1045 | "pwd", "print your remote working directory", |
1046 | "\n" |
1047 | " Print the current remote working directory for your SFTP session.\n", |
1048 | sftp_cmd_pwd |
1049 | }, |
1050 | { |
bf5240cd |
1051 | "quit", "bye", NULL, |
1052 | sftp_cmd_quit |
1053 | }, |
1054 | { |
1055 | "reget", "continue downloading a file", |
1056 | " <filename> [ <local-filename> ]\n" |
1057 | " Works exactly like the \"get\" command, but the local file\n" |
1058 | " must already exist. The download will begin at the end of the\n" |
1059 | " file. This is for resuming a download that was interrupted.\n", |
1060 | sftp_cmd_reget |
1061 | }, |
1062 | { |
1063 | "ren", "mv", NULL, |
1064 | sftp_cmd_mv |
1065 | }, |
1066 | { |
1067 | "rename", "mv", NULL, |
1068 | sftp_cmd_mv |
1069 | }, |
1070 | { |
1071 | "reput", "continue uploading a file", |
1072 | " <filename> [ <remote-filename> ]\n" |
1073 | " Works exactly like the \"put\" command, but the remote file\n" |
1074 | " must already exist. The upload will begin at the end of the\n" |
1075 | " file. This is for resuming an upload that was interrupted.\n", |
1076 | sftp_cmd_reput |
1077 | }, |
1078 | { |
1079 | "rm", "del", NULL, |
1080 | sftp_cmd_rm |
1081 | }, |
1082 | { |
1083 | "rmdir", "remove a directory on the remote server", |
1084 | " <directory-name>\n" |
1085 | " Removes the directory with the given name on the server.\n" |
1086 | " The directory will not be removed unless it is empty.\n", |
1087 | sftp_cmd_rmdir |
1088 | } |
1089 | }; |
1090 | |
1091 | const struct sftp_cmd_lookup *lookup_command(char *name) |
1092 | { |
1093 | int i, j, k, cmp; |
1094 | |
1095 | i = -1; |
1096 | j = sizeof(sftp_lookup) / sizeof(*sftp_lookup); |
1097 | while (j - i > 1) { |
1098 | k = (j + i) / 2; |
1099 | cmp = strcmp(name, sftp_lookup[k].name); |
1100 | if (cmp < 0) |
1101 | j = k; |
1102 | else if (cmp > 0) |
1103 | i = k; |
1104 | else { |
1105 | return &sftp_lookup[k]; |
1106 | } |
1107 | } |
1108 | return NULL; |
1109 | } |
1110 | |
1111 | static int sftp_cmd_help(struct sftp_command *cmd) |
1112 | { |
1113 | int i; |
1114 | if (cmd->nwords == 1) { |
1115 | /* |
1116 | * Give short help on each command. |
1117 | */ |
1118 | int maxlen; |
1119 | maxlen = 0; |
1120 | for (i = 0; i < sizeof(sftp_lookup) / sizeof(*sftp_lookup); i++) { |
1121 | int len = strlen(sftp_lookup[i].name); |
1122 | if (maxlen < len) |
1123 | maxlen = len; |
1124 | } |
1125 | for (i = 0; i < sizeof(sftp_lookup) / sizeof(*sftp_lookup); i++) { |
1126 | const struct sftp_cmd_lookup *lookup; |
1127 | lookup = &sftp_lookup[i]; |
1128 | printf("%-*s", maxlen+2, lookup->name); |
1129 | if (lookup->longhelp == NULL) |
1130 | lookup = lookup_command(lookup->shorthelp); |
1131 | printf("%s\n", lookup->shorthelp); |
1132 | } |
1133 | } else { |
1134 | /* |
1135 | * Give long help on specific commands. |
1136 | */ |
1137 | for (i = 1; i < cmd->nwords; i++) { |
1138 | const struct sftp_cmd_lookup *lookup; |
1139 | lookup = lookup_command(cmd->words[i]); |
1140 | if (!lookup) { |
1141 | printf("help: %s: command not found\n", cmd->words[i]); |
1142 | } else { |
1143 | printf("%s", lookup->name); |
1144 | if (lookup->longhelp == NULL) |
1145 | lookup = lookup_command(lookup->shorthelp); |
1146 | printf("%s", lookup->longhelp); |
1147 | } |
1148 | } |
1149 | } |
df49ff19 |
1150 | return 1; |
bf5240cd |
1151 | } |
4c7f0d61 |
1152 | |
1153 | /* ---------------------------------------------------------------------- |
1154 | * Command line reading and parsing. |
1155 | */ |
9954aaa3 |
1156 | struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags) |
32874aea |
1157 | { |
4c7f0d61 |
1158 | char *line; |
1159 | int linelen, linesize; |
1160 | struct sftp_command *cmd; |
1161 | char *p, *q, *r; |
1162 | int quoting; |
1163 | |
df49ff19 |
1164 | if ((mode == 0) || (modeflags & 1)) { |
1165 | printf("psftp> "); |
1166 | } |
4c7f0d61 |
1167 | fflush(stdout); |
1168 | |
1169 | cmd = smalloc(sizeof(struct sftp_command)); |
1170 | cmd->words = NULL; |
1171 | cmd->nwords = 0; |
1172 | cmd->wordssize = 0; |
1173 | |
1174 | line = NULL; |
1175 | linesize = linelen = 0; |
1176 | while (1) { |
1177 | int len; |
1178 | char *ret; |
1179 | |
1180 | linesize += 512; |
1181 | line = srealloc(line, linesize); |
9954aaa3 |
1182 | ret = fgets(line + linelen, linesize - linelen, fp); |
4c7f0d61 |
1183 | |
1184 | if (!ret || (linelen == 0 && line[0] == '\0')) { |
1185 | cmd->obey = sftp_cmd_quit; |
d13c2ee9 |
1186 | if ((mode == 0) || (modeflags & 1)) |
1187 | printf("quit\n"); |
4c7f0d61 |
1188 | return cmd; /* eof */ |
1189 | } |
32874aea |
1190 | len = linelen + strlen(line + linelen); |
4c7f0d61 |
1191 | linelen += len; |
32874aea |
1192 | if (line[linelen - 1] == '\n') { |
4c7f0d61 |
1193 | linelen--; |
1194 | line[linelen] = '\0'; |
1195 | break; |
1196 | } |
1197 | } |
df49ff19 |
1198 | if (modeflags & 1) { |
1199 | printf("%s\n", line); |
1200 | } |
4c7f0d61 |
1201 | |
1202 | /* |
1203 | * Parse the command line into words. The syntax is: |
1204 | * - double quotes are removed, but cause spaces within to be |
1205 | * treated as non-separating. |
1206 | * - a double-doublequote pair is a literal double quote, inside |
1207 | * _or_ outside quotes. Like this: |
1208 | * |
1209 | * firstword "second word" "this has ""quotes"" in" sodoes""this"" |
1210 | * |
1211 | * becomes |
1212 | * |
1213 | * >firstword< |
1214 | * >second word< |
1215 | * >this has "quotes" in< |
1216 | * >sodoes"this"< |
1217 | */ |
1218 | p = line; |
1219 | while (*p) { |
1220 | /* skip whitespace */ |
32874aea |
1221 | while (*p && (*p == ' ' || *p == '\t')) |
1222 | p++; |
4c7f0d61 |
1223 | /* mark start of word */ |
1224 | q = r = p; /* q sits at start, r writes word */ |
1225 | quoting = 0; |
1226 | while (*p) { |
1227 | if (!quoting && (*p == ' ' || *p == '\t')) |
1228 | break; /* reached end of word */ |
1229 | else if (*p == '"' && p[1] == '"') |
32874aea |
1230 | p += 2, *r++ = '"'; /* a literal quote */ |
4c7f0d61 |
1231 | else if (*p == '"') |
1232 | p++, quoting = !quoting; |
1233 | else |
1234 | *r++ = *p++; |
1235 | } |
32874aea |
1236 | if (*p) |
1237 | p++; /* skip over the whitespace */ |
4c7f0d61 |
1238 | *r = '\0'; |
1239 | if (cmd->nwords >= cmd->wordssize) { |
1240 | cmd->wordssize = cmd->nwords + 16; |
32874aea |
1241 | cmd->words = |
1242 | srealloc(cmd->words, cmd->wordssize * sizeof(char *)); |
4c7f0d61 |
1243 | } |
1244 | cmd->words[cmd->nwords++] = q; |
1245 | } |
1246 | |
1247 | /* |
1248 | * Now parse the first word and assign a function. |
1249 | */ |
1250 | |
1251 | if (cmd->nwords == 0) |
1252 | cmd->obey = sftp_cmd_null; |
1253 | else { |
bf5240cd |
1254 | const struct sftp_cmd_lookup *lookup; |
1255 | lookup = lookup_command(cmd->words[0]); |
1256 | if (!lookup) |
1257 | cmd->obey = sftp_cmd_unknown; |
1258 | else |
1259 | cmd->obey = lookup->obey; |
4c7f0d61 |
1260 | } |
1261 | |
1262 | return cmd; |
1263 | } |
1264 | |
fa3db767 |
1265 | static void do_sftp_init(void) |
32874aea |
1266 | { |
4c7f0d61 |
1267 | /* |
1268 | * Do protocol initialisation. |
1269 | */ |
1270 | if (!fxp_init()) { |
1271 | fprintf(stderr, |
32874aea |
1272 | "Fatal: unable to initialise SFTP: %s\n", fxp_error()); |
0d694692 |
1273 | return; |
4c7f0d61 |
1274 | } |
1275 | |
1276 | /* |
1277 | * Find out where our home directory is. |
1278 | */ |
f9e162aa |
1279 | homedir = fxp_realpath("."); |
4c7f0d61 |
1280 | if (!homedir) { |
1281 | fprintf(stderr, |
1282 | "Warning: failed to resolve home directory: %s\n", |
1283 | fxp_error()); |
1284 | homedir = dupstr("."); |
1285 | } else { |
1286 | printf("Remote working directory is %s\n", homedir); |
1287 | } |
1288 | pwd = dupstr(homedir); |
fa3db767 |
1289 | } |
1290 | |
1291 | void do_sftp(int mode, int modeflags, char *batchfile) |
1292 | { |
1293 | FILE *fp; |
df49ff19 |
1294 | int ret; |
4c7f0d61 |
1295 | |
9954aaa3 |
1296 | /* |
1297 | * Batch mode? |
4c7f0d61 |
1298 | */ |
9954aaa3 |
1299 | if (mode == 0) { |
1300 | |
1301 | /* ------------------------------------------------------------------ |
1302 | * Now we're ready to do Real Stuff. |
1303 | */ |
1304 | while (1) { |
df49ff19 |
1305 | struct sftp_command *cmd; |
1306 | cmd = sftp_getcmd(stdin, 0, 0); |
1307 | if (!cmd) |
1308 | break; |
1309 | if (cmd->obey(cmd) < 0) |
1310 | break; |
bf5240cd |
1311 | } |
9954aaa3 |
1312 | } else { |
1313 | fp = fopen(batchfile, "r"); |
1314 | if (!fp) { |
bf5240cd |
1315 | printf("Fatal: unable to open %s\n", batchfile); |
1316 | return; |
9954aaa3 |
1317 | } |
1318 | while (1) { |
bf5240cd |
1319 | struct sftp_command *cmd; |
1320 | cmd = sftp_getcmd(fp, mode, modeflags); |
1321 | if (!cmd) |
1322 | break; |
df49ff19 |
1323 | ret = cmd->obey(cmd); |
1324 | if (ret < 0) |
bf5240cd |
1325 | break; |
df49ff19 |
1326 | if (ret == 0) { |
bf5240cd |
1327 | if (!(modeflags & 2)) |
9954aaa3 |
1328 | break; |
bf5240cd |
1329 | } |
9954aaa3 |
1330 | } |
bf5240cd |
1331 | fclose(fp); |
9954aaa3 |
1332 | |
4c7f0d61 |
1333 | } |
4a8fc3c4 |
1334 | } |
4c7f0d61 |
1335 | |
4a8fc3c4 |
1336 | /* ---------------------------------------------------------------------- |
1337 | * Dirty bits: integration with PuTTY. |
1338 | */ |
1339 | |
1340 | static int verbose = 0; |
1341 | |
1342 | void verify_ssh_host_key(char *host, int port, char *keytype, |
32874aea |
1343 | char *keystr, char *fingerprint) |
1344 | { |
4a8fc3c4 |
1345 | int ret; |
d0718310 |
1346 | HANDLE hin; |
1347 | DWORD savemode, i; |
4a8fc3c4 |
1348 | |
1349 | static const char absentmsg[] = |
32874aea |
1350 | "The server's host key is not cached in the registry. You\n" |
1351 | "have no guarantee that the server is the computer you\n" |
1352 | "think it is.\n" |
1353 | "The server's key fingerprint is:\n" |
1354 | "%s\n" |
1355 | "If you trust this host, enter \"y\" to add the key to\n" |
1356 | "PuTTY's cache and carry on connecting.\n" |
d0718310 |
1357 | "If you want to carry on connecting just once, without\n" |
1358 | "adding the key to the cache, enter \"n\".\n" |
1359 | "If you do not trust this host, press Return to abandon the\n" |
1360 | "connection.\n" |
1361 | "Store key in cache? (y/n) "; |
4a8fc3c4 |
1362 | |
1363 | static const char wrongmsg[] = |
32874aea |
1364 | "WARNING - POTENTIAL SECURITY BREACH!\n" |
1365 | "The server's host key does not match the one PuTTY has\n" |
1366 | "cached in the registry. This means that either the\n" |
1367 | "server administrator has changed the host key, or you\n" |
1368 | "have actually connected to another computer pretending\n" |
1369 | "to be the server.\n" |
1370 | "The new key fingerprint is:\n" |
1371 | "%s\n" |
1372 | "If you were expecting this change and trust the new key,\n" |
d0718310 |
1373 | "enter \"y\" to update PuTTY's cache and continue connecting.\n" |
32874aea |
1374 | "If you want to carry on connecting but without updating\n" |
d0718310 |
1375 | "the cache, enter \"n\".\n" |
32874aea |
1376 | "If you want to abandon the connection completely, press\n" |
1377 | "Return to cancel. Pressing Return is the ONLY guaranteed\n" |
1378 | "safe choice.\n" |
1379 | "Update cached key? (y/n, Return cancels connection) "; |
4a8fc3c4 |
1380 | |
1381 | static const char abandoned[] = "Connection abandoned.\n"; |
1382 | |
1383 | char line[32]; |
1384 | |
1385 | /* |
1386 | * Verify the key against the registry. |
1387 | */ |
1388 | ret = verify_host_key(host, port, keytype, keystr); |
1389 | |
32874aea |
1390 | if (ret == 0) /* success - key matched OK */ |
1391 | return; |
d0718310 |
1392 | |
32874aea |
1393 | if (ret == 2) { /* key was different */ |
1394 | fprintf(stderr, wrongmsg, fingerprint); |
d0718310 |
1395 | fflush(stderr); |
4a8fc3c4 |
1396 | } |
32874aea |
1397 | if (ret == 1) { /* key was absent */ |
1398 | fprintf(stderr, absentmsg, fingerprint); |
d0718310 |
1399 | fflush(stderr); |
1400 | } |
1401 | |
1402 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1403 | GetConsoleMode(hin, &savemode); |
1404 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
1405 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
1406 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
1407 | SetConsoleMode(hin, savemode); |
1408 | |
1409 | if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') { |
1410 | if (line[0] == 'y' || line[0] == 'Y') |
32874aea |
1411 | store_host_key(host, port, keytype, keystr); |
d0718310 |
1412 | } else { |
1413 | fprintf(stderr, abandoned); |
1414 | exit(0); |
4a8fc3c4 |
1415 | } |
1416 | } |
1417 | |
1418 | /* |
ca20bfcf |
1419 | * Ask whether the selected cipher is acceptable (since it was |
1420 | * below the configured 'warn' threshold). |
1421 | * cs: 0 = both ways, 1 = client->server, 2 = server->client |
1422 | */ |
1423 | void askcipher(char *ciphername, int cs) |
1424 | { |
1425 | HANDLE hin; |
1426 | DWORD savemode, i; |
1427 | |
1428 | static const char msg[] = |
1429 | "The first %scipher supported by the server is\n" |
1430 | "%s, which is below the configured warning threshold.\n" |
1431 | "Continue with connection? (y/n) "; |
1432 | static const char abandoned[] = "Connection abandoned.\n"; |
1433 | |
1434 | char line[32]; |
1435 | |
1436 | fprintf(stderr, msg, |
1437 | (cs == 0) ? "" : |
1438 | (cs == 1) ? "client-to-server " : |
1439 | "server-to-client ", |
1440 | ciphername); |
1441 | fflush(stderr); |
1442 | |
1443 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1444 | GetConsoleMode(hin, &savemode); |
1445 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
1446 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
1447 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
1448 | SetConsoleMode(hin, savemode); |
1449 | |
1450 | if (line[0] == 'y' || line[0] == 'Y') { |
1451 | return; |
1452 | } else { |
1453 | fprintf(stderr, abandoned); |
1454 | exit(0); |
1455 | } |
1456 | } |
1457 | |
1458 | /* |
00db133f |
1459 | * Ask whether to wipe a session log file before writing to it. |
1460 | * Returns 2 for wipe, 1 for append, 0 for cancel (don't log). |
1461 | */ |
1462 | int askappend(char *filename) |
1463 | { |
1464 | HANDLE hin; |
1465 | DWORD savemode, i; |
1466 | |
1467 | static const char msgtemplate[] = |
1468 | "The session log file \"%.*s\" already exists.\n" |
1469 | "You can overwrite it with a new session log,\n" |
1470 | "append your session log to the end of it,\n" |
1471 | "or disable session logging for this session.\n" |
1472 | "Enter \"y\" to wipe the file, \"n\" to append to it,\n" |
1473 | "or just press Return to disable logging.\n" |
1474 | "Wipe the log file? (y/n, Return cancels logging) "; |
1475 | |
1476 | char line[32]; |
1477 | |
1478 | fprintf(stderr, msgtemplate, FILENAME_MAX, filename); |
1479 | fflush(stderr); |
1480 | |
1481 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1482 | GetConsoleMode(hin, &savemode); |
1483 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
1484 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
1485 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
1486 | SetConsoleMode(hin, savemode); |
1487 | |
1488 | if (line[0] == 'y' || line[0] == 'Y') |
1489 | return 2; |
1490 | else if (line[0] == 'n' || line[0] == 'N') |
1491 | return 1; |
1492 | else |
1493 | return 0; |
1494 | } |
1495 | |
1496 | /* |
7bedb13c |
1497 | * Warn about the obsolescent key file format. |
1498 | */ |
1499 | void old_keyfile_warning(void) |
1500 | { |
1501 | static const char message[] = |
1502 | "You are loading an SSH 2 private key which has an\n" |
1503 | "old version of the file format. This means your key\n" |
1504 | "file is not fully tamperproof. Future versions of\n" |
1505 | "PuTTY may stop supporting this private key format,\n" |
1506 | "so we recommend you convert your key to the new\n" |
1507 | "format.\n" |
1508 | "\n" |
1509 | "Once the key is loaded into PuTTYgen, you can perform\n" |
1510 | "this conversion simply by saving it again.\n"; |
1511 | |
1512 | fputs(message, stderr); |
1513 | } |
1514 | |
1515 | /* |
4a8fc3c4 |
1516 | * Print an error message and perform a fatal exit. |
1517 | */ |
1518 | void fatalbox(char *fmt, ...) |
1519 | { |
32874aea |
1520 | char str[0x100]; /* Make the size big enough */ |
4a8fc3c4 |
1521 | va_list ap; |
1522 | va_start(ap, fmt); |
1523 | strcpy(str, "Fatal:"); |
32874aea |
1524 | vsprintf(str + strlen(str), fmt, ap); |
4a8fc3c4 |
1525 | va_end(ap); |
1526 | strcat(str, "\n"); |
fa3db767 |
1527 | fputs(stderr, str); |
4a8fc3c4 |
1528 | |
1529 | exit(1); |
1530 | } |
1531 | void connection_fatal(char *fmt, ...) |
1532 | { |
32874aea |
1533 | char str[0x100]; /* Make the size big enough */ |
4a8fc3c4 |
1534 | va_list ap; |
1535 | va_start(ap, fmt); |
1536 | strcpy(str, "Fatal:"); |
32874aea |
1537 | vsprintf(str + strlen(str), fmt, ap); |
4a8fc3c4 |
1538 | va_end(ap); |
1539 | strcat(str, "\n"); |
fa3db767 |
1540 | fputs(stderr, str); |
4a8fc3c4 |
1541 | |
1542 | exit(1); |
1543 | } |
1544 | |
32874aea |
1545 | void logevent(char *string) |
1546 | { |
1547 | } |
4a8fc3c4 |
1548 | |
760e88b2 |
1549 | void ldisc_send(char *buf, int len, int interactive) |
32874aea |
1550 | { |
4a8fc3c4 |
1551 | /* |
1552 | * This is only here because of the calls to ldisc_send(NULL, |
1553 | * 0) in ssh.c. Nothing in PSFTP actually needs to use the |
1554 | * ldisc as an ldisc. So if we get called with any real data, I |
1555 | * want to know about it. |
4c7f0d61 |
1556 | */ |
4a8fc3c4 |
1557 | assert(len == 0); |
1558 | } |
1559 | |
1560 | /* |
1561 | * Be told what socket we're supposed to be using. |
1562 | */ |
1563 | static SOCKET sftp_ssh_socket; |
32874aea |
1564 | char *do_select(SOCKET skt, int startup) |
1565 | { |
4a8fc3c4 |
1566 | if (startup) |
1567 | sftp_ssh_socket = skt; |
1568 | else |
1569 | sftp_ssh_socket = INVALID_SOCKET; |
1570 | return NULL; |
4c7f0d61 |
1571 | } |
4a8fc3c4 |
1572 | extern int select_result(WPARAM, LPARAM); |
1573 | |
1574 | /* |
1575 | * Receive a block of data from the SSH link. Block until all data |
1576 | * is available. |
1577 | * |
1578 | * To do this, we repeatedly call the SSH protocol module, with our |
1579 | * own trap in from_backend() to catch the data that comes back. We |
1580 | * do this until we have enough data. |
1581 | */ |
1582 | |
32874aea |
1583 | static unsigned char *outptr; /* where to put the data */ |
1584 | static unsigned outlen; /* how much data required */ |
4a8fc3c4 |
1585 | static unsigned char *pending = NULL; /* any spare data */ |
32874aea |
1586 | static unsigned pendlen = 0, pendsize = 0; /* length and phys. size of buffer */ |
5471d09a |
1587 | int from_backend(int is_stderr, char *data, int datalen) |
32874aea |
1588 | { |
1589 | unsigned char *p = (unsigned char *) data; |
1590 | unsigned len = (unsigned) datalen; |
4a8fc3c4 |
1591 | |
1592 | /* |
1593 | * stderr data is just spouted to local stderr and otherwise |
1594 | * ignored. |
1595 | */ |
1596 | if (is_stderr) { |
1597 | fwrite(data, 1, len, stderr); |
5471d09a |
1598 | return 0; |
4a8fc3c4 |
1599 | } |
1600 | |
1601 | /* |
1602 | * If this is before the real session begins, just return. |
1603 | */ |
1604 | if (!outptr) |
5471d09a |
1605 | return 0; |
4a8fc3c4 |
1606 | |
1607 | if (outlen > 0) { |
32874aea |
1608 | unsigned used = outlen; |
1609 | if (used > len) |
1610 | used = len; |
1611 | memcpy(outptr, p, used); |
1612 | outptr += used; |
1613 | outlen -= used; |
1614 | p += used; |
1615 | len -= used; |
4a8fc3c4 |
1616 | } |
1617 | |
1618 | if (len > 0) { |
32874aea |
1619 | if (pendsize < pendlen + len) { |
1620 | pendsize = pendlen + len + 4096; |
1621 | pending = (pending ? srealloc(pending, pendsize) : |
1622 | smalloc(pendsize)); |
1623 | if (!pending) |
1624 | fatalbox("Out of memory"); |
1625 | } |
1626 | memcpy(pending + pendlen, p, len); |
1627 | pendlen += len; |
4a8fc3c4 |
1628 | } |
5471d09a |
1629 | |
1630 | return 0; |
4a8fc3c4 |
1631 | } |
32874aea |
1632 | int sftp_recvdata(char *buf, int len) |
1633 | { |
1634 | outptr = (unsigned char *) buf; |
4a8fc3c4 |
1635 | outlen = len; |
1636 | |
1637 | /* |
1638 | * See if the pending-input block contains some of what we |
1639 | * need. |
1640 | */ |
1641 | if (pendlen > 0) { |
32874aea |
1642 | unsigned pendused = pendlen; |
1643 | if (pendused > outlen) |
1644 | pendused = outlen; |
4a8fc3c4 |
1645 | memcpy(outptr, pending, pendused); |
32874aea |
1646 | memmove(pending, pending + pendused, pendlen - pendused); |
4a8fc3c4 |
1647 | outptr += pendused; |
1648 | outlen -= pendused; |
32874aea |
1649 | pendlen -= pendused; |
1650 | if (pendlen == 0) { |
1651 | pendsize = 0; |
1652 | sfree(pending); |
1653 | pending = NULL; |
1654 | } |
1655 | if (outlen == 0) |
1656 | return 1; |
4a8fc3c4 |
1657 | } |
1658 | |
1659 | while (outlen > 0) { |
32874aea |
1660 | fd_set readfds; |
4a8fc3c4 |
1661 | |
32874aea |
1662 | FD_ZERO(&readfds); |
1663 | FD_SET(sftp_ssh_socket, &readfds); |
1664 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
1665 | return 0; /* doom */ |
1666 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
4a8fc3c4 |
1667 | } |
1668 | |
1669 | return 1; |
1670 | } |
32874aea |
1671 | int sftp_senddata(char *buf, int len) |
1672 | { |
1673 | back->send((unsigned char *) buf, len); |
4a8fc3c4 |
1674 | return 1; |
1675 | } |
1676 | |
1677 | /* |
1678 | * Loop through the ssh connection and authentication process. |
1679 | */ |
32874aea |
1680 | static void ssh_sftp_init(void) |
1681 | { |
4a8fc3c4 |
1682 | if (sftp_ssh_socket == INVALID_SOCKET) |
1683 | return; |
1684 | while (!back->sendok()) { |
32874aea |
1685 | fd_set readfds; |
1686 | FD_ZERO(&readfds); |
1687 | FD_SET(sftp_ssh_socket, &readfds); |
1688 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
1689 | return; /* doom */ |
1690 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
4a8fc3c4 |
1691 | } |
1692 | } |
1693 | |
1694 | static char *password = NULL; |
fa17a66e |
1695 | static int get_line(const char *prompt, char *str, int maxlen, int is_pw) |
4a8fc3c4 |
1696 | { |
1697 | HANDLE hin, hout; |
fa17a66e |
1698 | DWORD savemode, newmode, i; |
4a8fc3c4 |
1699 | |
1700 | if (password) { |
32874aea |
1701 | static int tried_once = 0; |
1702 | |
1703 | if (tried_once) { |
1704 | return 0; |
1705 | } else { |
1706 | strncpy(str, password, maxlen); |
1707 | str[maxlen - 1] = '\0'; |
1708 | tried_once = 1; |
1709 | return 1; |
1710 | } |
4a8fc3c4 |
1711 | } |
1712 | |
1713 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1714 | hout = GetStdHandle(STD_OUTPUT_HANDLE); |
1715 | if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) { |
1716 | fprintf(stderr, "Cannot get standard input/output handles\n"); |
1717 | exit(1); |
1718 | } |
1719 | |
1720 | GetConsoleMode(hin, &savemode); |
fa17a66e |
1721 | newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT; |
1722 | if (is_pw) |
32874aea |
1723 | newmode &= ~ENABLE_ECHO_INPUT; |
fa17a66e |
1724 | else |
32874aea |
1725 | newmode |= ENABLE_ECHO_INPUT; |
fa17a66e |
1726 | SetConsoleMode(hin, newmode); |
4a8fc3c4 |
1727 | |
1728 | WriteFile(hout, prompt, strlen(prompt), &i, NULL); |
32874aea |
1729 | ReadFile(hin, str, maxlen - 1, &i, NULL); |
4a8fc3c4 |
1730 | |
1731 | SetConsoleMode(hin, savemode); |
1732 | |
32874aea |
1733 | if ((int) i > maxlen) |
1734 | i = maxlen - 1; |
1735 | else |
1736 | i = i - 2; |
4a8fc3c4 |
1737 | str[i] = '\0'; |
1738 | |
fa17a66e |
1739 | if (is_pw) |
32874aea |
1740 | WriteFile(hout, "\r\n", 2, &i, NULL); |
4a8fc3c4 |
1741 | |
1742 | return 1; |
1743 | } |
1744 | |
1745 | /* |
1746 | * Initialize the Win$ock driver. |
1747 | */ |
1748 | static void init_winsock(void) |
1749 | { |
1750 | WORD winsock_ver; |
1751 | WSADATA wsadata; |
1752 | |
1753 | winsock_ver = MAKEWORD(1, 1); |
1754 | if (WSAStartup(winsock_ver, &wsadata)) { |
1755 | fprintf(stderr, "Unable to initialise WinSock"); |
1756 | exit(1); |
1757 | } |
32874aea |
1758 | if (LOBYTE(wsadata.wVersion) != 1 || HIBYTE(wsadata.wVersion) != 1) { |
4a8fc3c4 |
1759 | fprintf(stderr, "WinSock version is incompatible with 1.1"); |
1760 | exit(1); |
1761 | } |
1762 | } |
1763 | |
1764 | /* |
1765 | * Short description of parameters. |
1766 | */ |
1767 | static void usage(void) |
1768 | { |
1769 | printf("PuTTY Secure File Transfer (SFTP) client\n"); |
1770 | printf("%s\n", ver); |
1771 | printf("Usage: psftp [options] user@host\n"); |
1772 | printf("Options:\n"); |
9954aaa3 |
1773 | printf(" -b file use specified batchfile\n"); |
1774 | printf(" -bc output batchfile commands\n"); |
1775 | printf(" -be don't stop batchfile processing if errors\n"); |
4a8fc3c4 |
1776 | printf(" -v show verbose messages\n"); |
1777 | printf(" -P port connect to specified port\n"); |
1778 | printf(" -pw passw login with specified password\n"); |
1779 | exit(1); |
1780 | } |
1781 | |
1782 | /* |
fa3db767 |
1783 | * Connect to a host. |
4a8fc3c4 |
1784 | */ |
fa3db767 |
1785 | static int psftp_connect(char *userhost, char *user, int portnumber) |
4a8fc3c4 |
1786 | { |
fa3db767 |
1787 | char *host, *realhost; |
4a8fc3c4 |
1788 | char *err; |
4a8fc3c4 |
1789 | |
1790 | /* Separate host and username */ |
1791 | host = userhost; |
1792 | host = strrchr(host, '@'); |
1793 | if (host == NULL) { |
1794 | host = userhost; |
1795 | } else { |
1796 | *host++ = '\0'; |
1797 | if (user) { |
32874aea |
1798 | printf("psftp: multiple usernames specified; using \"%s\"\n", |
1799 | user); |
4a8fc3c4 |
1800 | } else |
1801 | user = userhost; |
1802 | } |
1803 | |
1804 | /* Try to load settings for this host */ |
1805 | do_defaults(host, &cfg); |
1806 | if (cfg.host[0] == '\0') { |
1807 | /* No settings for this host; use defaults */ |
32874aea |
1808 | do_defaults(NULL, &cfg); |
1809 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
1810 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
4a8fc3c4 |
1811 | cfg.port = 22; |
1812 | } |
1813 | |
449925a6 |
1814 | /* |
1815 | * Trim leading whitespace off the hostname if it's there. |
1816 | */ |
1817 | { |
1818 | int space = strspn(cfg.host, " \t"); |
1819 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
1820 | } |
1821 | |
1822 | /* See if host is of the form user@host */ |
1823 | if (cfg.host[0] != '\0') { |
1824 | char *atsign = strchr(cfg.host, '@'); |
1825 | /* Make sure we're not overflowing the user field */ |
1826 | if (atsign) { |
1827 | if (atsign - cfg.host < sizeof cfg.username) { |
1828 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
1829 | cfg.username[atsign - cfg.host] = '\0'; |
1830 | } |
1831 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
1832 | } |
1833 | } |
1834 | |
1835 | /* |
1836 | * Trim a colon suffix off the hostname if it's there. |
1837 | */ |
1838 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
1839 | |
4a8fc3c4 |
1840 | /* Set username */ |
1841 | if (user != NULL && user[0] != '\0') { |
32874aea |
1842 | strncpy(cfg.username, user, sizeof(cfg.username) - 1); |
1843 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
4a8fc3c4 |
1844 | } |
1845 | if (!cfg.username[0]) { |
1846 | printf("login as: "); |
1847 | if (!fgets(cfg.username, sizeof(cfg.username), stdin)) { |
1848 | fprintf(stderr, "psftp: aborting\n"); |
1849 | exit(1); |
1850 | } else { |
1851 | int len = strlen(cfg.username); |
32874aea |
1852 | if (cfg.username[len - 1] == '\n') |
1853 | cfg.username[len - 1] = '\0'; |
4a8fc3c4 |
1854 | } |
1855 | } |
1856 | |
1857 | if (cfg.protocol != PROT_SSH) |
1858 | cfg.port = 22; |
1859 | |
1860 | if (portnumber) |
1861 | cfg.port = portnumber; |
1862 | |
1863 | /* SFTP uses SSH2 by default always */ |
1864 | cfg.sshprot = 2; |
1865 | |
d27b4a18 |
1866 | /* |
1867 | * Disable scary things which shouldn't be enabled for simple |
1868 | * things like SCP and SFTP: agent forwarding, port forwarding, |
1869 | * X forwarding. |
1870 | */ |
1871 | cfg.x11_forward = 0; |
1872 | cfg.agentfwd = 0; |
1873 | cfg.portfwd[0] = cfg.portfwd[1] = '\0'; |
1874 | |
bebf22d0 |
1875 | /* Set up subsystem name. */ |
4a8fc3c4 |
1876 | strcpy(cfg.remote_cmd, "sftp"); |
1877 | cfg.ssh_subsys = TRUE; |
1878 | cfg.nopty = TRUE; |
1879 | |
bebf22d0 |
1880 | /* |
1881 | * Set up fallback option, for SSH1 servers or servers with the |
1882 | * sftp subsystem not enabled but the server binary installed |
1883 | * in the usual place. We only support fallback on Unix |
248c0c5a |
1884 | * systems, and we use a kludgy piece of shellery which should |
1885 | * try to find sftp-server in various places (the obvious |
1886 | * systemwide spots /usr/lib and /usr/local/lib, and then the |
1887 | * user's PATH) and finally give up. |
bebf22d0 |
1888 | * |
248c0c5a |
1889 | * test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server |
1890 | * test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server |
1891 | * exec sftp-server |
bebf22d0 |
1892 | * |
1893 | * the idea being that this will attempt to use either of the |
1894 | * obvious pathnames and then give up, and when it does give up |
1895 | * it will print the preferred pathname in the error messages. |
1896 | */ |
1897 | cfg.remote_cmd_ptr2 = |
248c0c5a |
1898 | "test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server\n" |
1899 | "test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server\n" |
1900 | "exec sftp-server"; |
bebf22d0 |
1901 | cfg.ssh_subsys2 = FALSE; |
1902 | |
4a8fc3c4 |
1903 | back = &ssh_backend; |
1904 | |
2184a5d9 |
1905 | err = back->init(cfg.host, cfg.port, &realhost, 0); |
4a8fc3c4 |
1906 | if (err != NULL) { |
fa3db767 |
1907 | fprintf(stderr, "ssh_init: %s\n", err); |
4a8fc3c4 |
1908 | return 1; |
1909 | } |
1910 | ssh_sftp_init(); |
1911 | if (verbose && realhost != NULL) |
1912 | printf("Connected to %s\n", realhost); |
fa3db767 |
1913 | return 0; |
1914 | } |
1915 | |
1916 | /* |
1917 | * Main program. Parse arguments etc. |
1918 | */ |
1919 | int main(int argc, char *argv[]) |
1920 | { |
1921 | int i; |
1922 | int portnumber = 0; |
1923 | char *userhost, *user; |
1924 | int mode = 0; |
1925 | int modeflags = 0; |
1926 | char *batchfile = NULL; |
1927 | |
1928 | flags = FLAG_STDERR | FLAG_INTERACTIVE; |
1929 | ssh_get_line = &get_line; |
1930 | init_winsock(); |
1931 | sk_init(); |
1932 | |
1933 | userhost = user = NULL; |
1934 | |
1935 | for (i = 1; i < argc; i++) { |
1936 | if (argv[i][0] != '-') { |
1937 | if (userhost) |
1938 | usage(); |
1939 | else |
1940 | userhost = dupstr(argv[i]); |
1941 | } else if (strcmp(argv[i], "-v") == 0) { |
1942 | verbose = 1, flags |= FLAG_VERBOSE; |
1943 | } else if (strcmp(argv[i], "-h") == 0 || |
1944 | strcmp(argv[i], "-?") == 0) { |
1945 | usage(); |
1946 | } else if (strcmp(argv[i], "-l") == 0 && i + 1 < argc) { |
1947 | user = argv[++i]; |
1948 | } else if (strcmp(argv[i], "-P") == 0 && i + 1 < argc) { |
1949 | portnumber = atoi(argv[++i]); |
1950 | } else if (strcmp(argv[i], "-pw") == 0 && i + 1 < argc) { |
1951 | password = argv[++i]; |
1952 | } else if (strcmp(argv[i], "-b") == 0 && i + 1 < argc) { |
1953 | mode = 1; |
1954 | batchfile = argv[++i]; |
d13c2ee9 |
1955 | } else if (strcmp(argv[i], "-bc") == 0) { |
fa3db767 |
1956 | modeflags = modeflags | 1; |
d13c2ee9 |
1957 | } else if (strcmp(argv[i], "-be") == 0) { |
fa3db767 |
1958 | modeflags = modeflags | 2; |
1959 | } else if (strcmp(argv[i], "--") == 0) { |
1960 | i++; |
1961 | break; |
1962 | } else { |
1963 | usage(); |
1964 | } |
1965 | } |
1966 | argc -= i; |
1967 | argv += i; |
1968 | back = NULL; |
1969 | |
1970 | /* |
1971 | * If a user@host string has already been provided, connect to |
1972 | * it now. |
1973 | */ |
1974 | if (userhost) { |
1975 | if (psftp_connect(userhost, user, portnumber)) |
1976 | return 1; |
1977 | do_sftp_init(); |
1978 | } else { |
1979 | printf("psftp: no hostname specified; use \"open host.name\"" |
1980 | " to connect\n"); |
1981 | } |
4c7f0d61 |
1982 | |
9954aaa3 |
1983 | do_sftp(mode, modeflags, batchfile); |
4a8fc3c4 |
1984 | |
1985 | if (back != NULL && back->socket() != NULL) { |
1986 | char ch; |
1987 | back->special(TS_EOF); |
1988 | sftp_recvdata(&ch, 1); |
1989 | } |
1990 | WSACleanup(); |
1991 | random_save_seed(); |
1992 | |
4c7f0d61 |
1993 | return 0; |
1994 | } |