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 | |
4a693cfc |
37 | void platform_get_x11_auth(struct X11Display *display, Conf *conf) |
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 | |
ae62eaeb |
56 | FontSpec *platform_default_fontspec(const char *name) |
876eefd4 |
57 | { |
ae62eaeb |
58 | return fontspec_new(""); |
876eefd4 |
59 | } |
60 | |
61 | Filename platform_default_filename(const char *name) |
62 | { |
63 | Filename ret; |
64 | if (!strcmp(name, "LogFileName")) |
65 | strcpy(ret.path, "putty.log"); |
66 | else |
67 | *ret.path = '\0'; |
68 | return ret; |
69 | } |
70 | |
c6ccd5c2 |
71 | char *get_ttymode(void *frontend, const char *mode) { return NULL; } |
72 | |
edd0cb8a |
73 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
74 | { |
75 | int ret; |
76 | ret = cmdline_get_passwd_input(p, in, inlen); |
77 | if (ret == -1) |
78 | ret = console_get_userpass_input(p, in, inlen); |
79 | return ret; |
80 | } |
81 | |
876eefd4 |
82 | /* |
876eefd4 |
83 | * Set local current directory. Returns NULL on success, or else an |
84 | * error message which must be freed after printing. |
85 | */ |
86 | char *psftp_lcd(char *dir) |
87 | { |
88 | if (chdir(dir) < 0) |
89 | return dupprintf("%s: chdir: %s", dir, strerror(errno)); |
90 | else |
91 | return NULL; |
92 | } |
93 | |
94 | /* |
95 | * Get local current directory. Returns a string which must be |
96 | * freed. |
97 | */ |
98 | char *psftp_getcwd(void) |
99 | { |
100 | char *buffer, *ret; |
101 | int size = 256; |
102 | |
103 | buffer = snewn(size, char); |
104 | while (1) { |
105 | ret = getcwd(buffer, size); |
106 | if (ret != NULL) |
107 | return ret; |
108 | if (errno != ERANGE) { |
109 | sfree(buffer); |
110 | return dupprintf("[cwd unavailable: %s]", strerror(errno)); |
111 | } |
112 | /* |
113 | * Otherwise, ERANGE was returned, meaning the buffer |
114 | * wasn't big enough. |
115 | */ |
116 | size = size * 3 / 2; |
117 | buffer = sresize(buffer, size, char); |
118 | } |
119 | } |
120 | |
121 | struct RFile { |
122 | int fd; |
123 | }; |
124 | |
0ac1920c |
125 | RFile *open_existing_file(char *name, uint64 *size, |
ee07dce4 |
126 | unsigned long *mtime, unsigned long *atime, |
127 | long *perms) |
876eefd4 |
128 | { |
129 | int fd; |
130 | RFile *ret; |
131 | |
132 | fd = open(name, O_RDONLY); |
133 | if (fd < 0) |
134 | return NULL; |
135 | |
136 | ret = snew(RFile); |
137 | ret->fd = fd; |
138 | |
ee07dce4 |
139 | if (size || mtime || atime || perms) { |
876eefd4 |
140 | struct stat statbuf; |
141 | if (fstat(fd, &statbuf) < 0) { |
142 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
143 | memset(&statbuf, 0, sizeof(statbuf)); |
144 | } |
145 | |
7bb18feb |
146 | if (size) |
147 | *size = uint64_make((statbuf.st_size >> 16) >> 16, |
148 | statbuf.st_size); |
0ac1920c |
149 | |
876eefd4 |
150 | if (mtime) |
151 | *mtime = statbuf.st_mtime; |
152 | |
153 | if (atime) |
154 | *atime = statbuf.st_atime; |
ee07dce4 |
155 | |
156 | if (perms) |
157 | *perms = statbuf.st_mode; |
876eefd4 |
158 | } |
159 | |
160 | return ret; |
161 | } |
162 | |
163 | int read_from_file(RFile *f, void *buffer, int length) |
164 | { |
165 | return read(f->fd, buffer, length); |
166 | } |
167 | |
168 | void close_rfile(RFile *f) |
169 | { |
170 | close(f->fd); |
171 | sfree(f); |
172 | } |
173 | |
174 | struct WFile { |
175 | int fd; |
176 | char *name; |
177 | }; |
178 | |
ee07dce4 |
179 | WFile *open_new_file(char *name, long perms) |
876eefd4 |
180 | { |
181 | int fd; |
182 | WFile *ret; |
183 | |
ee07dce4 |
184 | fd = open(name, O_CREAT | O_TRUNC | O_WRONLY, |
185 | (mode_t)(perms ? perms : 0666)); |
876eefd4 |
186 | if (fd < 0) |
187 | return NULL; |
188 | |
189 | ret = snew(WFile); |
190 | ret->fd = fd; |
191 | ret->name = dupstr(name); |
192 | |
193 | return ret; |
194 | } |
195 | |
0ac1920c |
196 | |
197 | WFile *open_existing_wfile(char *name, uint64 *size) |
198 | { |
199 | int fd; |
200 | WFile *ret; |
201 | |
202 | fd = open(name, O_APPEND | O_WRONLY); |
203 | if (fd < 0) |
204 | return NULL; |
205 | |
206 | ret = snew(WFile); |
207 | ret->fd = fd; |
bb8bd6e9 |
208 | ret->name = dupstr(name); |
0ac1920c |
209 | |
210 | if (size) { |
211 | struct stat statbuf; |
212 | if (fstat(fd, &statbuf) < 0) { |
213 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
214 | memset(&statbuf, 0, sizeof(statbuf)); |
215 | } |
216 | |
7bb18feb |
217 | *size = uint64_make((statbuf.st_size >> 16) >> 16, |
218 | statbuf.st_size); |
0ac1920c |
219 | } |
220 | |
221 | return ret; |
222 | } |
223 | |
876eefd4 |
224 | int write_to_file(WFile *f, void *buffer, int length) |
225 | { |
226 | char *p = (char *)buffer; |
227 | int so_far = 0; |
228 | |
229 | /* Keep trying until we've really written as much as we can. */ |
230 | while (length > 0) { |
231 | int ret = write(f->fd, p, length); |
232 | |
233 | if (ret < 0) |
234 | return ret; |
235 | |
236 | if (ret == 0) |
237 | break; |
238 | |
239 | p += ret; |
240 | length -= ret; |
241 | so_far += ret; |
242 | } |
243 | |
244 | return so_far; |
245 | } |
246 | |
247 | void set_file_times(WFile *f, unsigned long mtime, unsigned long atime) |
248 | { |
249 | struct utimbuf ut; |
250 | |
251 | ut.actime = atime; |
252 | ut.modtime = mtime; |
253 | |
254 | utime(f->name, &ut); |
255 | } |
256 | |
257 | /* Closes and frees the WFile */ |
258 | void close_wfile(WFile *f) |
259 | { |
260 | close(f->fd); |
261 | sfree(f->name); |
262 | sfree(f); |
263 | } |
264 | |
0ac1920c |
265 | /* Seek offset bytes through file, from whence, where whence is |
266 | FROM_START, FROM_CURRENT, or FROM_END */ |
267 | int seek_file(WFile *f, uint64 offset, int whence) |
268 | { |
269 | off_t fileofft; |
270 | int lseek_whence; |
271 | |
7bb18feb |
272 | fileofft = (((off_t) offset.hi << 16) << 16) + offset.lo; |
0ac1920c |
273 | |
274 | switch (whence) { |
275 | case FROM_START: |
276 | lseek_whence = SEEK_SET; |
277 | break; |
278 | case FROM_CURRENT: |
279 | lseek_whence = SEEK_CUR; |
280 | break; |
281 | case FROM_END: |
282 | lseek_whence = SEEK_END; |
283 | break; |
284 | default: |
285 | return -1; |
286 | } |
287 | |
288 | return lseek(f->fd, fileofft, lseek_whence) >= 0 ? 0 : -1; |
289 | } |
290 | |
291 | uint64 get_file_posn(WFile *f) |
292 | { |
293 | off_t fileofft; |
294 | uint64 ret; |
295 | |
296 | fileofft = lseek(f->fd, (off_t) 0, SEEK_CUR); |
297 | |
7bb18feb |
298 | ret = uint64_make((fileofft >> 16) >> 16, fileofft); |
0ac1920c |
299 | |
300 | return ret; |
301 | } |
302 | |
876eefd4 |
303 | int file_type(char *name) |
304 | { |
305 | struct stat statbuf; |
306 | |
307 | if (stat(name, &statbuf) < 0) { |
308 | if (errno != ENOENT) |
309 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
310 | return FILE_TYPE_NONEXISTENT; |
311 | } |
312 | |
313 | if (S_ISREG(statbuf.st_mode)) |
314 | return FILE_TYPE_FILE; |
315 | |
316 | if (S_ISDIR(statbuf.st_mode)) |
317 | return FILE_TYPE_DIRECTORY; |
318 | |
319 | return FILE_TYPE_WEIRD; |
320 | } |
321 | |
322 | struct DirHandle { |
323 | DIR *dir; |
324 | }; |
325 | |
326 | DirHandle *open_directory(char *name) |
327 | { |
328 | DIR *dir; |
329 | DirHandle *ret; |
330 | |
331 | dir = opendir(name); |
332 | if (!dir) |
333 | return NULL; |
334 | |
335 | ret = snew(DirHandle); |
336 | ret->dir = dir; |
337 | return ret; |
338 | } |
339 | |
340 | char *read_filename(DirHandle *dir) |
341 | { |
342 | struct dirent *de; |
343 | |
344 | do { |
345 | de = readdir(dir->dir); |
346 | if (de == NULL) |
347 | return NULL; |
348 | } while ((de->d_name[0] == '.' && |
349 | (de->d_name[1] == '\0' || |
350 | (de->d_name[1] == '.' && de->d_name[2] == '\0')))); |
351 | |
352 | return dupstr(de->d_name); |
353 | } |
354 | |
355 | void close_directory(DirHandle *dir) |
356 | { |
357 | closedir(dir->dir); |
358 | sfree(dir); |
359 | } |
360 | |
361 | int test_wildcard(char *name, int cmdline) |
362 | { |
876eefd4 |
363 | struct stat statbuf; |
364 | |
9c77ddf6 |
365 | if (stat(name, &statbuf) == 0) { |
876eefd4 |
366 | return WCTYPE_FILENAME; |
9c77ddf6 |
367 | } else if (cmdline) { |
368 | /* |
369 | * On Unix, we never need to parse wildcards coming from |
370 | * the command line, because the shell will have expanded |
371 | * them into a filename list already. |
372 | */ |
373 | return WCTYPE_NONEXISTENT; |
374 | } else { |
375 | glob_t globbed; |
376 | int ret = WCTYPE_NONEXISTENT; |
377 | |
378 | if (glob(name, GLOB_ERR, NULL, &globbed) == 0) { |
379 | if (globbed.gl_pathc > 0) |
380 | ret = WCTYPE_WILDCARD; |
381 | globfree(&globbed); |
382 | } |
383 | |
384 | return ret; |
385 | } |
876eefd4 |
386 | } |
387 | |
388 | /* |
9c77ddf6 |
389 | * Actually return matching file names for a local wildcard. |
876eefd4 |
390 | */ |
391 | struct WildcardMatcher { |
9c77ddf6 |
392 | glob_t globbed; |
393 | int i; |
876eefd4 |
394 | }; |
9c77ddf6 |
395 | WildcardMatcher *begin_wildcard_matching(char *name) { |
396 | WildcardMatcher *ret = snew(WildcardMatcher); |
397 | |
398 | if (glob(name, 0, NULL, &ret->globbed) < 0) { |
399 | sfree(ret); |
400 | return NULL; |
401 | } |
402 | |
403 | ret->i = 0; |
404 | |
405 | return ret; |
406 | } |
407 | char *wildcard_get_filename(WildcardMatcher *dir) { |
408 | if (dir->i < dir->globbed.gl_pathc) { |
409 | return dupstr(dir->globbed.gl_pathv[dir->i++]); |
410 | } else |
411 | return NULL; |
412 | } |
413 | void finish_wildcard_matching(WildcardMatcher *dir) { |
414 | globfree(&dir->globbed); |
415 | sfree(dir); |
416 | } |
876eefd4 |
417 | |
e9d14678 |
418 | int vet_filename(char *name) |
419 | { |
420 | if (strchr(name, '/')) |
421 | return FALSE; |
422 | |
423 | if (name[0] == '.' && (!name[1] || (name[1] == '.' && !name[2]))) |
424 | return FALSE; |
425 | |
426 | return TRUE; |
427 | } |
428 | |
876eefd4 |
429 | int create_directory(char *name) |
430 | { |
431 | return mkdir(name, 0777) == 0; |
432 | } |
433 | |
434 | char *dir_file_cat(char *dir, char *file) |
435 | { |
436 | return dupcat(dir, "/", file, NULL); |
437 | } |
438 | |
439 | /* |
39934deb |
440 | * Do a select() between all currently active network fds and |
441 | * optionally stdin. |
876eefd4 |
442 | */ |
65857773 |
443 | static int ssh_sftp_do_select(int include_stdin, int no_fds_ok) |
876eefd4 |
444 | { |
445 | fd_set rset, wset, xset; |
446 | int i, fdcount, fdsize, *fdlist; |
447 | int fd, fdstate, rwx, ret, maxfd; |
39934deb |
448 | long now = GETTICKCOUNT(); |
876eefd4 |
449 | |
450 | fdlist = NULL; |
451 | fdcount = fdsize = 0; |
452 | |
39934deb |
453 | do { |
876eefd4 |
454 | |
39934deb |
455 | /* Count the currently active fds. */ |
456 | i = 0; |
457 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
458 | fd = next_fd(&fdstate, &rwx)) i++; |
876eefd4 |
459 | |
65857773 |
460 | if (i < 1 && !no_fds_ok) |
39934deb |
461 | return -1; /* doom */ |
876eefd4 |
462 | |
39934deb |
463 | /* Expand the fdlist buffer if necessary. */ |
464 | if (i > fdsize) { |
465 | fdsize = i + 16; |
466 | fdlist = sresize(fdlist, fdsize, int); |
467 | } |
876eefd4 |
468 | |
39934deb |
469 | FD_ZERO(&rset); |
470 | FD_ZERO(&wset); |
471 | FD_ZERO(&xset); |
472 | maxfd = 0; |
876eefd4 |
473 | |
39934deb |
474 | /* |
475 | * Add all currently open fds to the select sets, and store |
476 | * them in fdlist as well. |
477 | */ |
478 | fdcount = 0; |
479 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
480 | fd = next_fd(&fdstate, &rwx)) { |
481 | fdlist[fdcount++] = fd; |
482 | if (rwx & 1) |
483 | FD_SET_MAX(fd, maxfd, rset); |
484 | if (rwx & 2) |
485 | FD_SET_MAX(fd, maxfd, wset); |
486 | if (rwx & 4) |
487 | FD_SET_MAX(fd, maxfd, xset); |
488 | } |
489 | |
490 | if (include_stdin) |
491 | FD_SET_MAX(0, maxfd, rset); |
492 | |
493 | do { |
494 | long next, ticks; |
495 | struct timeval tv, *ptv; |
496 | |
497 | if (run_timers(now, &next)) { |
498 | ticks = next - GETTICKCOUNT(); |
499 | if (ticks <= 0) |
500 | ticks = 1; /* just in case */ |
501 | tv.tv_sec = ticks / 1000; |
502 | tv.tv_usec = ticks % 1000 * 1000; |
503 | ptv = &tv; |
504 | } else { |
505 | ptv = NULL; |
506 | } |
507 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
508 | if (ret == 0) |
509 | now = next; |
2ac3322e |
510 | else { |
511 | long newnow = GETTICKCOUNT(); |
512 | /* |
513 | * Check to see whether the system clock has |
514 | * changed massively during the select. |
515 | */ |
516 | if (newnow - now < 0 || newnow - now > next - now) { |
517 | /* |
518 | * If so, look at the elapsed time in the |
519 | * select and use it to compute a new |
520 | * tickcount_offset. |
521 | */ |
522 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
523 | /* So we'd like GETTICKCOUNT to have returned othernow, |
524 | * but instead it return newnow. Hence ... */ |
525 | tickcount_offset += othernow - newnow; |
526 | now = othernow; |
527 | } else { |
528 | now = newnow; |
529 | } |
530 | } |
39934deb |
531 | } while (ret < 0 && errno != EINTR); |
532 | } while (ret == 0); |
876eefd4 |
533 | |
534 | if (ret < 0) { |
535 | perror("select"); |
536 | exit(1); |
537 | } |
538 | |
539 | for (i = 0; i < fdcount; i++) { |
540 | fd = fdlist[i]; |
541 | /* |
542 | * We must process exceptional notifications before |
543 | * ordinary readability ones, or we may go straight |
544 | * past the urgent marker. |
545 | */ |
546 | if (FD_ISSET(fd, &xset)) |
547 | select_result(fd, 4); |
548 | if (FD_ISSET(fd, &rset)) |
549 | select_result(fd, 1); |
550 | if (FD_ISSET(fd, &wset)) |
551 | select_result(fd, 2); |
552 | } |
553 | |
554 | sfree(fdlist); |
555 | |
39934deb |
556 | return FD_ISSET(0, &rset) ? 1 : 0; |
557 | } |
558 | |
559 | /* |
560 | * Wait for some network data and process it. |
561 | */ |
562 | int ssh_sftp_loop_iteration(void) |
563 | { |
65857773 |
564 | return ssh_sftp_do_select(FALSE, FALSE); |
39934deb |
565 | } |
566 | |
567 | /* |
568 | * Read a PSFTP command line from stdin. |
569 | */ |
65857773 |
570 | char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok) |
39934deb |
571 | { |
572 | char *buf; |
573 | int buflen, bufsize, ret; |
574 | |
575 | fputs(prompt, stdout); |
576 | fflush(stdout); |
577 | |
578 | buf = NULL; |
579 | buflen = bufsize = 0; |
580 | |
581 | while (1) { |
65857773 |
582 | ret = ssh_sftp_do_select(TRUE, no_fds_ok); |
39934deb |
583 | if (ret < 0) { |
584 | printf("connection died\n"); |
585 | return NULL; /* woop woop */ |
586 | } |
587 | if (ret > 0) { |
588 | if (buflen >= bufsize) { |
589 | bufsize = buflen + 512; |
590 | buf = sresize(buf, bufsize, char); |
591 | } |
592 | ret = read(0, buf+buflen, 1); |
593 | if (ret < 0) { |
594 | perror("read"); |
595 | return NULL; |
596 | } |
597 | if (ret == 0) { |
598 | /* eof on stdin; no error, but no answer either */ |
599 | return NULL; |
600 | } |
601 | |
602 | if (buf[buflen++] == '\n') { |
603 | /* we have a full line */ |
604 | return buf; |
605 | } |
606 | } |
607 | } |
876eefd4 |
608 | } |
609 | |
610 | /* |
611 | * Main program: do platform-specific initialisation and then call |
612 | * psftp_main(). |
613 | */ |
614 | int main(int argc, char *argv[]) |
615 | { |
616 | uxsel_init(); |
617 | return psftp_main(argc, argv); |
618 | } |