876eefd4 |
1 | /* |
2 | * uxsftp.c: the Unix-specific parts of PSFTP and PSCP. |
3 | */ |
4 | |
5 | #include <sys/time.h> |
6 | #include <sys/types.h> |
7 | #include <sys/stat.h> |
18609086 |
8 | #include <stdlib.h> |
876eefd4 |
9 | #include <fcntl.h> |
10 | #include <dirent.h> |
11 | #include <unistd.h> |
12 | #include <utime.h> |
13 | #include <errno.h> |
14 | #include <assert.h> |
9c77ddf6 |
15 | #include <glob.h> |
154c73d5 |
16 | #ifndef HAVE_NO_SYS_SELECT_H |
17 | #include <sys/select.h> |
18 | #endif |
876eefd4 |
19 | |
20 | #include "putty.h" |
8def70c3 |
21 | #include "ssh.h" |
876eefd4 |
22 | #include "psftp.h" |
0ac1920c |
23 | #include "int64.h" |
876eefd4 |
24 | |
25 | /* |
26 | * In PSFTP our selects are synchronous, so these functions are |
27 | * empty stubs. |
28 | */ |
29 | int uxsel_input_add(int fd, int rwx) { return 0; } |
30 | void uxsel_input_remove(int id) { } |
31 | |
32 | char *x_get_default(const char *key) |
33 | { |
34 | return NULL; /* this is a stub */ |
35 | } |
36 | |
8def70c3 |
37 | void platform_get_x11_auth(struct X11Display *display, const Config *cfg) |
876eefd4 |
38 | { |
39 | /* Do nothing, therefore no auth. */ |
40 | } |
8def70c3 |
41 | const int platform_uses_x11_unix_by_default = TRUE; |
876eefd4 |
42 | |
43 | /* |
44 | * Default settings that are specific to PSFTP. |
45 | */ |
46 | char *platform_default_s(const char *name) |
47 | { |
48 | return NULL; |
49 | } |
50 | |
51 | int platform_default_i(const char *name, int def) |
52 | { |
53 | return def; |
54 | } |
55 | |
56 | FontSpec platform_default_fontspec(const char *name) |
57 | { |
58 | FontSpec ret; |
59 | *ret.name = '\0'; |
60 | return ret; |
61 | } |
62 | |
63 | Filename platform_default_filename(const char *name) |
64 | { |
65 | Filename ret; |
66 | if (!strcmp(name, "LogFileName")) |
67 | strcpy(ret.path, "putty.log"); |
68 | else |
69 | *ret.path = '\0'; |
70 | return ret; |
71 | } |
72 | |
c6ccd5c2 |
73 | char *get_ttymode(void *frontend, const char *mode) { return NULL; } |
74 | |
edd0cb8a |
75 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
76 | { |
77 | int ret; |
78 | ret = cmdline_get_passwd_input(p, in, inlen); |
79 | if (ret == -1) |
80 | ret = console_get_userpass_input(p, in, inlen); |
81 | return ret; |
82 | } |
83 | |
876eefd4 |
84 | /* |
876eefd4 |
85 | * Set local current directory. Returns NULL on success, or else an |
86 | * error message which must be freed after printing. |
87 | */ |
88 | char *psftp_lcd(char *dir) |
89 | { |
90 | if (chdir(dir) < 0) |
91 | return dupprintf("%s: chdir: %s", dir, strerror(errno)); |
92 | else |
93 | return NULL; |
94 | } |
95 | |
96 | /* |
97 | * Get local current directory. Returns a string which must be |
98 | * freed. |
99 | */ |
100 | char *psftp_getcwd(void) |
101 | { |
102 | char *buffer, *ret; |
103 | int size = 256; |
104 | |
105 | buffer = snewn(size, char); |
106 | while (1) { |
107 | ret = getcwd(buffer, size); |
108 | if (ret != NULL) |
109 | return ret; |
110 | if (errno != ERANGE) { |
111 | sfree(buffer); |
112 | return dupprintf("[cwd unavailable: %s]", strerror(errno)); |
113 | } |
114 | /* |
115 | * Otherwise, ERANGE was returned, meaning the buffer |
116 | * wasn't big enough. |
117 | */ |
118 | size = size * 3 / 2; |
119 | buffer = sresize(buffer, size, char); |
120 | } |
121 | } |
122 | |
123 | struct RFile { |
124 | int fd; |
125 | }; |
126 | |
0ac1920c |
127 | RFile *open_existing_file(char *name, uint64 *size, |
876eefd4 |
128 | unsigned long *mtime, unsigned long *atime) |
129 | { |
130 | int fd; |
131 | RFile *ret; |
132 | |
133 | fd = open(name, O_RDONLY); |
134 | if (fd < 0) |
135 | return NULL; |
136 | |
137 | ret = snew(RFile); |
138 | ret->fd = fd; |
139 | |
140 | if (size || mtime || atime) { |
141 | struct stat statbuf; |
142 | if (fstat(fd, &statbuf) < 0) { |
143 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
144 | memset(&statbuf, 0, sizeof(statbuf)); |
145 | } |
146 | |
7bb18feb |
147 | if (size) |
148 | *size = uint64_make((statbuf.st_size >> 16) >> 16, |
149 | statbuf.st_size); |
0ac1920c |
150 | |
876eefd4 |
151 | if (mtime) |
152 | *mtime = statbuf.st_mtime; |
153 | |
154 | if (atime) |
155 | *atime = statbuf.st_atime; |
156 | } |
157 | |
158 | return ret; |
159 | } |
160 | |
161 | int read_from_file(RFile *f, void *buffer, int length) |
162 | { |
163 | return read(f->fd, buffer, length); |
164 | } |
165 | |
166 | void close_rfile(RFile *f) |
167 | { |
168 | close(f->fd); |
169 | sfree(f); |
170 | } |
171 | |
172 | struct WFile { |
173 | int fd; |
174 | char *name; |
175 | }; |
176 | |
177 | WFile *open_new_file(char *name) |
178 | { |
179 | int fd; |
180 | WFile *ret; |
181 | |
182 | fd = open(name, O_CREAT | O_TRUNC | O_WRONLY, 0666); |
183 | if (fd < 0) |
184 | return NULL; |
185 | |
186 | ret = snew(WFile); |
187 | ret->fd = fd; |
188 | ret->name = dupstr(name); |
189 | |
190 | return ret; |
191 | } |
192 | |
0ac1920c |
193 | |
194 | WFile *open_existing_wfile(char *name, uint64 *size) |
195 | { |
196 | int fd; |
197 | WFile *ret; |
198 | |
199 | fd = open(name, O_APPEND | O_WRONLY); |
200 | if (fd < 0) |
201 | return NULL; |
202 | |
203 | ret = snew(WFile); |
204 | ret->fd = fd; |
205 | |
206 | if (size) { |
207 | struct stat statbuf; |
208 | if (fstat(fd, &statbuf) < 0) { |
209 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
210 | memset(&statbuf, 0, sizeof(statbuf)); |
211 | } |
212 | |
7bb18feb |
213 | *size = uint64_make((statbuf.st_size >> 16) >> 16, |
214 | statbuf.st_size); |
0ac1920c |
215 | } |
216 | |
217 | return ret; |
218 | } |
219 | |
876eefd4 |
220 | int write_to_file(WFile *f, void *buffer, int length) |
221 | { |
222 | char *p = (char *)buffer; |
223 | int so_far = 0; |
224 | |
225 | /* Keep trying until we've really written as much as we can. */ |
226 | while (length > 0) { |
227 | int ret = write(f->fd, p, length); |
228 | |
229 | if (ret < 0) |
230 | return ret; |
231 | |
232 | if (ret == 0) |
233 | break; |
234 | |
235 | p += ret; |
236 | length -= ret; |
237 | so_far += ret; |
238 | } |
239 | |
240 | return so_far; |
241 | } |
242 | |
243 | void set_file_times(WFile *f, unsigned long mtime, unsigned long atime) |
244 | { |
245 | struct utimbuf ut; |
246 | |
247 | ut.actime = atime; |
248 | ut.modtime = mtime; |
249 | |
250 | utime(f->name, &ut); |
251 | } |
252 | |
253 | /* Closes and frees the WFile */ |
254 | void close_wfile(WFile *f) |
255 | { |
256 | close(f->fd); |
257 | sfree(f->name); |
258 | sfree(f); |
259 | } |
260 | |
0ac1920c |
261 | /* Seek offset bytes through file, from whence, where whence is |
262 | FROM_START, FROM_CURRENT, or FROM_END */ |
263 | int seek_file(WFile *f, uint64 offset, int whence) |
264 | { |
265 | off_t fileofft; |
266 | int lseek_whence; |
267 | |
7bb18feb |
268 | fileofft = (((off_t) offset.hi << 16) << 16) + offset.lo; |
0ac1920c |
269 | |
270 | switch (whence) { |
271 | case FROM_START: |
272 | lseek_whence = SEEK_SET; |
273 | break; |
274 | case FROM_CURRENT: |
275 | lseek_whence = SEEK_CUR; |
276 | break; |
277 | case FROM_END: |
278 | lseek_whence = SEEK_END; |
279 | break; |
280 | default: |
281 | return -1; |
282 | } |
283 | |
284 | return lseek(f->fd, fileofft, lseek_whence) >= 0 ? 0 : -1; |
285 | } |
286 | |
287 | uint64 get_file_posn(WFile *f) |
288 | { |
289 | off_t fileofft; |
290 | uint64 ret; |
291 | |
292 | fileofft = lseek(f->fd, (off_t) 0, SEEK_CUR); |
293 | |
7bb18feb |
294 | ret = uint64_make((fileofft >> 16) >> 16, fileofft); |
0ac1920c |
295 | |
296 | return ret; |
297 | } |
298 | |
876eefd4 |
299 | int file_type(char *name) |
300 | { |
301 | struct stat statbuf; |
302 | |
303 | if (stat(name, &statbuf) < 0) { |
304 | if (errno != ENOENT) |
305 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
306 | return FILE_TYPE_NONEXISTENT; |
307 | } |
308 | |
309 | if (S_ISREG(statbuf.st_mode)) |
310 | return FILE_TYPE_FILE; |
311 | |
312 | if (S_ISDIR(statbuf.st_mode)) |
313 | return FILE_TYPE_DIRECTORY; |
314 | |
315 | return FILE_TYPE_WEIRD; |
316 | } |
317 | |
318 | struct DirHandle { |
319 | DIR *dir; |
320 | }; |
321 | |
322 | DirHandle *open_directory(char *name) |
323 | { |
324 | DIR *dir; |
325 | DirHandle *ret; |
326 | |
327 | dir = opendir(name); |
328 | if (!dir) |
329 | return NULL; |
330 | |
331 | ret = snew(DirHandle); |
332 | ret->dir = dir; |
333 | return ret; |
334 | } |
335 | |
336 | char *read_filename(DirHandle *dir) |
337 | { |
338 | struct dirent *de; |
339 | |
340 | do { |
341 | de = readdir(dir->dir); |
342 | if (de == NULL) |
343 | return NULL; |
344 | } while ((de->d_name[0] == '.' && |
345 | (de->d_name[1] == '\0' || |
346 | (de->d_name[1] == '.' && de->d_name[2] == '\0')))); |
347 | |
348 | return dupstr(de->d_name); |
349 | } |
350 | |
351 | void close_directory(DirHandle *dir) |
352 | { |
353 | closedir(dir->dir); |
354 | sfree(dir); |
355 | } |
356 | |
357 | int test_wildcard(char *name, int cmdline) |
358 | { |
876eefd4 |
359 | struct stat statbuf; |
360 | |
9c77ddf6 |
361 | if (stat(name, &statbuf) == 0) { |
876eefd4 |
362 | return WCTYPE_FILENAME; |
9c77ddf6 |
363 | } else if (cmdline) { |
364 | /* |
365 | * On Unix, we never need to parse wildcards coming from |
366 | * the command line, because the shell will have expanded |
367 | * them into a filename list already. |
368 | */ |
369 | return WCTYPE_NONEXISTENT; |
370 | } else { |
371 | glob_t globbed; |
372 | int ret = WCTYPE_NONEXISTENT; |
373 | |
374 | if (glob(name, GLOB_ERR, NULL, &globbed) == 0) { |
375 | if (globbed.gl_pathc > 0) |
376 | ret = WCTYPE_WILDCARD; |
377 | globfree(&globbed); |
378 | } |
379 | |
380 | return ret; |
381 | } |
876eefd4 |
382 | } |
383 | |
384 | /* |
9c77ddf6 |
385 | * Actually return matching file names for a local wildcard. |
876eefd4 |
386 | */ |
387 | struct WildcardMatcher { |
9c77ddf6 |
388 | glob_t globbed; |
389 | int i; |
876eefd4 |
390 | }; |
9c77ddf6 |
391 | WildcardMatcher *begin_wildcard_matching(char *name) { |
392 | WildcardMatcher *ret = snew(WildcardMatcher); |
393 | |
394 | if (glob(name, 0, NULL, &ret->globbed) < 0) { |
395 | sfree(ret); |
396 | return NULL; |
397 | } |
398 | |
399 | ret->i = 0; |
400 | |
401 | return ret; |
402 | } |
403 | char *wildcard_get_filename(WildcardMatcher *dir) { |
404 | if (dir->i < dir->globbed.gl_pathc) { |
405 | return dupstr(dir->globbed.gl_pathv[dir->i++]); |
406 | } else |
407 | return NULL; |
408 | } |
409 | void finish_wildcard_matching(WildcardMatcher *dir) { |
410 | globfree(&dir->globbed); |
411 | sfree(dir); |
412 | } |
876eefd4 |
413 | |
e9d14678 |
414 | int vet_filename(char *name) |
415 | { |
416 | if (strchr(name, '/')) |
417 | return FALSE; |
418 | |
419 | if (name[0] == '.' && (!name[1] || (name[1] == '.' && !name[2]))) |
420 | return FALSE; |
421 | |
422 | return TRUE; |
423 | } |
424 | |
876eefd4 |
425 | int create_directory(char *name) |
426 | { |
427 | return mkdir(name, 0777) == 0; |
428 | } |
429 | |
430 | char *dir_file_cat(char *dir, char *file) |
431 | { |
432 | return dupcat(dir, "/", file, NULL); |
433 | } |
434 | |
435 | /* |
39934deb |
436 | * Do a select() between all currently active network fds and |
437 | * optionally stdin. |
876eefd4 |
438 | */ |
65857773 |
439 | static int ssh_sftp_do_select(int include_stdin, int no_fds_ok) |
876eefd4 |
440 | { |
441 | fd_set rset, wset, xset; |
442 | int i, fdcount, fdsize, *fdlist; |
443 | int fd, fdstate, rwx, ret, maxfd; |
39934deb |
444 | long now = GETTICKCOUNT(); |
876eefd4 |
445 | |
446 | fdlist = NULL; |
447 | fdcount = fdsize = 0; |
448 | |
39934deb |
449 | do { |
876eefd4 |
450 | |
39934deb |
451 | /* Count the currently active fds. */ |
452 | i = 0; |
453 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
454 | fd = next_fd(&fdstate, &rwx)) i++; |
876eefd4 |
455 | |
65857773 |
456 | if (i < 1 && !no_fds_ok) |
39934deb |
457 | return -1; /* doom */ |
876eefd4 |
458 | |
39934deb |
459 | /* Expand the fdlist buffer if necessary. */ |
460 | if (i > fdsize) { |
461 | fdsize = i + 16; |
462 | fdlist = sresize(fdlist, fdsize, int); |
463 | } |
876eefd4 |
464 | |
39934deb |
465 | FD_ZERO(&rset); |
466 | FD_ZERO(&wset); |
467 | FD_ZERO(&xset); |
468 | maxfd = 0; |
876eefd4 |
469 | |
39934deb |
470 | /* |
471 | * Add all currently open fds to the select sets, and store |
472 | * them in fdlist as well. |
473 | */ |
474 | fdcount = 0; |
475 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
476 | fd = next_fd(&fdstate, &rwx)) { |
477 | fdlist[fdcount++] = fd; |
478 | if (rwx & 1) |
479 | FD_SET_MAX(fd, maxfd, rset); |
480 | if (rwx & 2) |
481 | FD_SET_MAX(fd, maxfd, wset); |
482 | if (rwx & 4) |
483 | FD_SET_MAX(fd, maxfd, xset); |
484 | } |
485 | |
486 | if (include_stdin) |
487 | FD_SET_MAX(0, maxfd, rset); |
488 | |
489 | do { |
490 | long next, ticks; |
491 | struct timeval tv, *ptv; |
492 | |
493 | if (run_timers(now, &next)) { |
494 | ticks = next - GETTICKCOUNT(); |
495 | if (ticks <= 0) |
496 | ticks = 1; /* just in case */ |
497 | tv.tv_sec = ticks / 1000; |
498 | tv.tv_usec = ticks % 1000 * 1000; |
499 | ptv = &tv; |
500 | } else { |
501 | ptv = NULL; |
502 | } |
503 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
504 | if (ret == 0) |
505 | now = next; |
2ac3322e |
506 | else { |
507 | long newnow = GETTICKCOUNT(); |
508 | /* |
509 | * Check to see whether the system clock has |
510 | * changed massively during the select. |
511 | */ |
512 | if (newnow - now < 0 || newnow - now > next - now) { |
513 | /* |
514 | * If so, look at the elapsed time in the |
515 | * select and use it to compute a new |
516 | * tickcount_offset. |
517 | */ |
518 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
519 | /* So we'd like GETTICKCOUNT to have returned othernow, |
520 | * but instead it return newnow. Hence ... */ |
521 | tickcount_offset += othernow - newnow; |
522 | now = othernow; |
523 | } else { |
524 | now = newnow; |
525 | } |
526 | } |
39934deb |
527 | } while (ret < 0 && errno != EINTR); |
528 | } while (ret == 0); |
876eefd4 |
529 | |
530 | if (ret < 0) { |
531 | perror("select"); |
532 | exit(1); |
533 | } |
534 | |
535 | for (i = 0; i < fdcount; i++) { |
536 | fd = fdlist[i]; |
537 | /* |
538 | * We must process exceptional notifications before |
539 | * ordinary readability ones, or we may go straight |
540 | * past the urgent marker. |
541 | */ |
542 | if (FD_ISSET(fd, &xset)) |
543 | select_result(fd, 4); |
544 | if (FD_ISSET(fd, &rset)) |
545 | select_result(fd, 1); |
546 | if (FD_ISSET(fd, &wset)) |
547 | select_result(fd, 2); |
548 | } |
549 | |
550 | sfree(fdlist); |
551 | |
39934deb |
552 | return FD_ISSET(0, &rset) ? 1 : 0; |
553 | } |
554 | |
555 | /* |
556 | * Wait for some network data and process it. |
557 | */ |
558 | int ssh_sftp_loop_iteration(void) |
559 | { |
65857773 |
560 | return ssh_sftp_do_select(FALSE, FALSE); |
39934deb |
561 | } |
562 | |
563 | /* |
564 | * Read a PSFTP command line from stdin. |
565 | */ |
65857773 |
566 | char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok) |
39934deb |
567 | { |
568 | char *buf; |
569 | int buflen, bufsize, ret; |
570 | |
571 | fputs(prompt, stdout); |
572 | fflush(stdout); |
573 | |
574 | buf = NULL; |
575 | buflen = bufsize = 0; |
576 | |
577 | while (1) { |
65857773 |
578 | ret = ssh_sftp_do_select(TRUE, no_fds_ok); |
39934deb |
579 | if (ret < 0) { |
580 | printf("connection died\n"); |
581 | return NULL; /* woop woop */ |
582 | } |
583 | if (ret > 0) { |
584 | if (buflen >= bufsize) { |
585 | bufsize = buflen + 512; |
586 | buf = sresize(buf, bufsize, char); |
587 | } |
588 | ret = read(0, buf+buflen, 1); |
589 | if (ret < 0) { |
590 | perror("read"); |
591 | return NULL; |
592 | } |
593 | if (ret == 0) { |
594 | /* eof on stdin; no error, but no answer either */ |
595 | return NULL; |
596 | } |
597 | |
598 | if (buf[buflen++] == '\n') { |
599 | /* we have a full line */ |
600 | return buf; |
601 | } |
602 | } |
603 | } |
876eefd4 |
604 | } |
605 | |
606 | /* |
607 | * Main program: do platform-specific initialisation and then call |
608 | * psftp_main(). |
609 | */ |
610 | int main(int argc, char *argv[]) |
611 | { |
612 | uxsel_init(); |
613 | return psftp_main(argc, argv); |
614 | } |