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29793ade | 1 | /* $OpenBSD: sftp-server.c,v 1.91 2010/01/13 01:40:16 djm Exp $ */ |
b5e300c2 | 2 | /* |
71c1910f | 3 | * Copyright (c) 2000-2004 Markus Friedl. All rights reserved. |
b5e300c2 | 4 | * |
71c1910f | 5 | * Permission to use, copy, modify, and distribute this software for any |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
b5e300c2 | 8 | * |
71c1910f | 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
b5e300c2 | 16 | */ |
31652869 | 17 | |
b5e300c2 | 18 | #include "includes.h" |
4095f623 | 19 | |
20 | #include <sys/types.h> | |
536c14e8 | 21 | #include <sys/param.h> |
4095f623 | 22 | #include <sys/stat.h> |
e264ac72 | 23 | #ifdef HAVE_SYS_TIME_H |
24 | # include <sys/time.h> | |
25 | #endif | |
4538e135 | 26 | #ifdef HAVE_SYS_MOUNT_H |
360b43ab | 27 | #include <sys/mount.h> |
4538e135 | 28 | #endif |
29 | #ifdef HAVE_SYS_STATVFS_H | |
360b43ab | 30 | #include <sys/statvfs.h> |
4538e135 | 31 | #endif |
68e39d38 | 32 | |
33 | #include <dirent.h> | |
028094f4 | 34 | #include <errno.h> |
d3221cca | 35 | #include <fcntl.h> |
b1842393 | 36 | #include <pwd.h> |
ffa517a8 | 37 | #include <stdlib.h> |
cf851879 | 38 | #include <stdio.h> |
00146caa | 39 | #include <string.h> |
31652869 | 40 | #include <pwd.h> |
b0f6943a | 41 | #include <time.h> |
00146caa | 42 | #include <unistd.h> |
31652869 | 43 | #include <stdarg.h> |
b5e300c2 | 44 | |
31652869 | 45 | #include "xmalloc.h" |
b5e300c2 | 46 | #include "buffer.h" |
42f11eb2 | 47 | #include "log.h" |
fd6168c1 | 48 | #include "misc.h" |
a13880bb | 49 | #include "uidswap.h" |
b5e300c2 | 50 | |
f546c780 | 51 | #include "sftp.h" |
61e96248 | 52 | #include "sftp-common.h" |
b5e300c2 | 53 | |
54 | /* helper */ | |
f546c780 | 55 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 56 | #define get_int() buffer_get_int(&iqueue); |
57 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
b5e300c2 | 58 | |
a13880bb | 59 | /* Our verbosity */ |
60 | LogLevel log_level = SYSLOG_LEVEL_ERROR; | |
61 | ||
62 | /* Our client */ | |
63 | struct passwd *pw = NULL; | |
64 | char *client_addr = NULL; | |
260d427b | 65 | |
b5e300c2 | 66 | /* input and output queue */ |
67 | Buffer iqueue; | |
68 | Buffer oqueue; | |
69 | ||
3a7fe5ba | 70 | /* Version of client */ |
71 | int version; | |
72 | ||
250caf33 | 73 | /* Disable writes */ |
74 | int readonly; | |
75 | ||
d7ded285 | 76 | /* portable attributes, etc. */ |
b5e300c2 | 77 | |
b5e300c2 | 78 | typedef struct Stat Stat; |
79 | ||
61e96248 | 80 | struct Stat { |
b5e300c2 | 81 | char *name; |
82 | char *long_name; | |
83 | Attrib attrib; | |
84 | }; | |
85 | ||
396c147e | 86 | static int |
b5e300c2 | 87 | errno_to_portable(int unixerrno) |
88 | { | |
89 | int ret = 0; | |
dce9bac5 | 90 | |
b5e300c2 | 91 | switch (unixerrno) { |
92 | case 0: | |
f546c780 | 93 | ret = SSH2_FX_OK; |
b5e300c2 | 94 | break; |
95 | case ENOENT: | |
96 | case ENOTDIR: | |
97 | case EBADF: | |
98 | case ELOOP: | |
f546c780 | 99 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 100 | break; |
101 | case EPERM: | |
102 | case EACCES: | |
103 | case EFAULT: | |
f546c780 | 104 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 105 | break; |
106 | case ENAMETOOLONG: | |
107 | case EINVAL: | |
f546c780 | 108 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 109 | break; |
10e804f4 | 110 | case ENOSYS: |
111 | ret = SSH2_FX_OP_UNSUPPORTED; | |
112 | break; | |
b5e300c2 | 113 | default: |
f546c780 | 114 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 115 | break; |
116 | } | |
117 | return ret; | |
118 | } | |
119 | ||
396c147e | 120 | static int |
b5e300c2 | 121 | flags_from_portable(int pflags) |
122 | { | |
123 | int flags = 0; | |
dce9bac5 | 124 | |
79ddf6db | 125 | if ((pflags & SSH2_FXF_READ) && |
126 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 127 | flags = O_RDWR; |
f546c780 | 128 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 129 | flags = O_RDONLY; |
f546c780 | 130 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 131 | flags = O_WRONLY; |
132 | } | |
f546c780 | 133 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 134 | flags |= O_CREAT; |
f546c780 | 135 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 136 | flags |= O_TRUNC; |
f546c780 | 137 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 138 | flags |= O_EXCL; |
139 | return flags; | |
140 | } | |
141 | ||
a13880bb | 142 | static const char * |
143 | string_from_portable(int pflags) | |
144 | { | |
145 | static char ret[128]; | |
146 | ||
147 | *ret = '\0'; | |
148 | ||
149 | #define PAPPEND(str) { \ | |
150 | if (*ret != '\0') \ | |
151 | strlcat(ret, ",", sizeof(ret)); \ | |
31652869 | 152 | strlcat(ret, str, sizeof(ret)); \ |
a13880bb | 153 | } |
154 | ||
155 | if (pflags & SSH2_FXF_READ) | |
156 | PAPPEND("READ") | |
157 | if (pflags & SSH2_FXF_WRITE) | |
158 | PAPPEND("WRITE") | |
159 | if (pflags & SSH2_FXF_CREAT) | |
160 | PAPPEND("CREATE") | |
161 | if (pflags & SSH2_FXF_TRUNC) | |
162 | PAPPEND("TRUNCATE") | |
163 | if (pflags & SSH2_FXF_EXCL) | |
164 | PAPPEND("EXCL") | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
396c147e | 169 | static Attrib * |
b5e300c2 | 170 | get_attrib(void) |
171 | { | |
172 | return decode_attrib(&iqueue); | |
173 | } | |
174 | ||
175 | /* handle handles */ | |
176 | ||
177 | typedef struct Handle Handle; | |
178 | struct Handle { | |
179 | int use; | |
180 | DIR *dirp; | |
181 | int fd; | |
182 | char *name; | |
a13880bb | 183 | u_int64_t bytes_read, bytes_write; |
b4bbe43c | 184 | int next_unused; |
b5e300c2 | 185 | }; |
dce9bac5 | 186 | |
b5e300c2 | 187 | enum { |
188 | HANDLE_UNUSED, | |
189 | HANDLE_DIR, | |
190 | HANDLE_FILE | |
191 | }; | |
dce9bac5 | 192 | |
b4bbe43c | 193 | Handle *handles = NULL; |
194 | u_int num_handles = 0; | |
195 | int first_unused_handle = -1; | |
b5e300c2 | 196 | |
b4bbe43c | 197 | static void handle_unused(int i) |
b5e300c2 | 198 | { |
b4bbe43c | 199 | handles[i].use = HANDLE_UNUSED; |
200 | handles[i].next_unused = first_unused_handle; | |
201 | first_unused_handle = i; | |
b5e300c2 | 202 | } |
203 | ||
396c147e | 204 | static int |
b6c7b7b7 | 205 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 206 | { |
b4bbe43c | 207 | int i; |
dce9bac5 | 208 | |
b4bbe43c | 209 | if (first_unused_handle == -1) { |
210 | if (num_handles + 1 <= num_handles) | |
211 | return -1; | |
212 | num_handles++; | |
213 | handles = xrealloc(handles, num_handles, sizeof(Handle)); | |
214 | handle_unused(num_handles - 1); | |
b5e300c2 | 215 | } |
b4bbe43c | 216 | |
217 | i = first_unused_handle; | |
218 | first_unused_handle = handles[i].next_unused; | |
219 | ||
220 | handles[i].use = use; | |
221 | handles[i].dirp = dirp; | |
222 | handles[i].fd = fd; | |
223 | handles[i].name = xstrdup(name); | |
224 | handles[i].bytes_read = handles[i].bytes_write = 0; | |
225 | ||
226 | return i; | |
b5e300c2 | 227 | } |
228 | ||
396c147e | 229 | static int |
b5e300c2 | 230 | handle_is_ok(int i, int type) |
231 | { | |
b4bbe43c | 232 | return i >= 0 && (u_int)i < num_handles && handles[i].use == type; |
b5e300c2 | 233 | } |
234 | ||
396c147e | 235 | static int |
b5e300c2 | 236 | handle_to_string(int handle, char **stringp, int *hlenp) |
237 | { | |
b5e300c2 | 238 | if (stringp == NULL || hlenp == NULL) |
239 | return -1; | |
b5c334cc | 240 | *stringp = xmalloc(sizeof(int32_t)); |
51e7a012 | 241 | put_u32(*stringp, handle); |
b5c334cc | 242 | *hlenp = sizeof(int32_t); |
b5e300c2 | 243 | return 0; |
244 | } | |
245 | ||
396c147e | 246 | static int |
b6c7b7b7 | 247 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 248 | { |
b5c334cc | 249 | int val; |
dce9bac5 | 250 | |
b5c334cc | 251 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 252 | return -1; |
51e7a012 | 253 | val = get_u32(handle); |
b5e300c2 | 254 | if (handle_is_ok(val, HANDLE_FILE) || |
255 | handle_is_ok(val, HANDLE_DIR)) | |
256 | return val; | |
257 | return -1; | |
258 | } | |
259 | ||
396c147e | 260 | static char * |
b5e300c2 | 261 | handle_to_name(int handle) |
262 | { | |
263 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
264 | handle_is_ok(handle, HANDLE_FILE)) | |
265 | return handles[handle].name; | |
266 | return NULL; | |
267 | } | |
268 | ||
396c147e | 269 | static DIR * |
b5e300c2 | 270 | handle_to_dir(int handle) |
271 | { | |
272 | if (handle_is_ok(handle, HANDLE_DIR)) | |
273 | return handles[handle].dirp; | |
274 | return NULL; | |
275 | } | |
276 | ||
396c147e | 277 | static int |
b5e300c2 | 278 | handle_to_fd(int handle) |
279 | { | |
2b87da3b | 280 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 281 | return handles[handle].fd; |
282 | return -1; | |
283 | } | |
284 | ||
a13880bb | 285 | static void |
286 | handle_update_read(int handle, ssize_t bytes) | |
287 | { | |
288 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
289 | handles[handle].bytes_read += bytes; | |
290 | } | |
291 | ||
292 | static void | |
293 | handle_update_write(int handle, ssize_t bytes) | |
294 | { | |
295 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
296 | handles[handle].bytes_write += bytes; | |
297 | } | |
298 | ||
299 | static u_int64_t | |
300 | handle_bytes_read(int handle) | |
301 | { | |
302 | if (handle_is_ok(handle, HANDLE_FILE)) | |
303 | return (handles[handle].bytes_read); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | static u_int64_t | |
308 | handle_bytes_write(int handle) | |
309 | { | |
310 | if (handle_is_ok(handle, HANDLE_FILE)) | |
311 | return (handles[handle].bytes_write); | |
312 | return 0; | |
313 | } | |
314 | ||
396c147e | 315 | static int |
b5e300c2 | 316 | handle_close(int handle) |
317 | { | |
318 | int ret = -1; | |
dce9bac5 | 319 | |
b5e300c2 | 320 | if (handle_is_ok(handle, HANDLE_FILE)) { |
321 | ret = close(handles[handle].fd); | |
3e2f2431 | 322 | xfree(handles[handle].name); |
b4bbe43c | 323 | handle_unused(handle); |
b5e300c2 | 324 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
325 | ret = closedir(handles[handle].dirp); | |
3e2f2431 | 326 | xfree(handles[handle].name); |
b4bbe43c | 327 | handle_unused(handle); |
b5e300c2 | 328 | } else { |
329 | errno = ENOENT; | |
330 | } | |
331 | return ret; | |
332 | } | |
333 | ||
a13880bb | 334 | static void |
335 | handle_log_close(int handle, char *emsg) | |
336 | { | |
337 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
338 | logit("%s%sclose \"%s\" bytes read %llu written %llu", | |
339 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
340 | handle_to_name(handle), | |
23983bf9 | 341 | (unsigned long long)handle_bytes_read(handle), |
342 | (unsigned long long)handle_bytes_write(handle)); | |
a13880bb | 343 | } else { |
344 | logit("%s%sclosedir \"%s\"", | |
345 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
346 | handle_to_name(handle)); | |
347 | } | |
348 | } | |
349 | ||
350 | static void | |
351 | handle_log_exit(void) | |
352 | { | |
353 | u_int i; | |
354 | ||
b4bbe43c | 355 | for (i = 0; i < num_handles; i++) |
a13880bb | 356 | if (handles[i].use != HANDLE_UNUSED) |
357 | handle_log_close(i, "forced"); | |
358 | } | |
359 | ||
396c147e | 360 | static int |
b5e300c2 | 361 | get_handle(void) |
362 | { | |
363 | char *handle; | |
f546c780 | 364 | int val = -1; |
bcbf86ec | 365 | u_int hlen; |
dce9bac5 | 366 | |
b5e300c2 | 367 | handle = get_string(&hlen); |
f546c780 | 368 | if (hlen < 256) |
369 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 370 | xfree(handle); |
371 | return val; | |
372 | } | |
373 | ||
374 | /* send replies */ | |
375 | ||
396c147e | 376 | static void |
b5e300c2 | 377 | send_msg(Buffer *m) |
378 | { | |
379 | int mlen = buffer_len(m); | |
dce9bac5 | 380 | |
b5e300c2 | 381 | buffer_put_int(&oqueue, mlen); |
382 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
383 | buffer_consume(m, mlen); | |
384 | } | |
385 | ||
a13880bb | 386 | static const char * |
387 | status_to_message(u_int32_t status) | |
b5e300c2 | 388 | { |
3a7fe5ba | 389 | const char *status_messages[] = { |
390 | "Success", /* SSH_FX_OK */ | |
391 | "End of file", /* SSH_FX_EOF */ | |
392 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
393 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
394 | "Failure", /* SSH_FX_FAILURE */ | |
395 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
396 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
397 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
398 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
399 | "Unknown error" /* Others */ | |
400 | }; | |
a13880bb | 401 | return (status_messages[MIN(status,SSH2_FX_MAX)]); |
402 | } | |
dce9bac5 | 403 | |
a13880bb | 404 | static void |
405 | send_status(u_int32_t id, u_int32_t status) | |
406 | { | |
407 | Buffer msg; | |
408 | ||
409 | debug3("request %u: sent status %u", id, status); | |
410 | if (log_level > SYSLOG_LEVEL_VERBOSE || | |
411 | (status != SSH2_FX_OK && status != SSH2_FX_EOF)) | |
412 | logit("sent status %s", status_to_message(status)); | |
b5e300c2 | 413 | buffer_init(&msg); |
f546c780 | 414 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 415 | buffer_put_int(&msg, id); |
ca75d7de | 416 | buffer_put_int(&msg, status); |
3a7fe5ba | 417 | if (version >= 3) { |
a13880bb | 418 | buffer_put_cstring(&msg, status_to_message(status)); |
3a7fe5ba | 419 | buffer_put_cstring(&msg, ""); |
420 | } | |
b5e300c2 | 421 | send_msg(&msg); |
422 | buffer_free(&msg); | |
423 | } | |
396c147e | 424 | static void |
b6c7b7b7 | 425 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 426 | { |
427 | Buffer msg; | |
dce9bac5 | 428 | |
b5e300c2 | 429 | buffer_init(&msg); |
430 | buffer_put_char(&msg, type); | |
431 | buffer_put_int(&msg, id); | |
432 | buffer_put_string(&msg, data, dlen); | |
433 | send_msg(&msg); | |
434 | buffer_free(&msg); | |
435 | } | |
436 | ||
396c147e | 437 | static void |
b6c7b7b7 | 438 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 439 | { |
a13880bb | 440 | debug("request %u: sent data len %d", id, dlen); |
f546c780 | 441 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 442 | } |
443 | ||
396c147e | 444 | static void |
b5e300c2 | 445 | send_handle(u_int32_t id, int handle) |
446 | { | |
447 | char *string; | |
448 | int hlen; | |
dce9bac5 | 449 | |
b5e300c2 | 450 | handle_to_string(handle, &string, &hlen); |
a13880bb | 451 | debug("request %u: sent handle handle %d", id, handle); |
f546c780 | 452 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 453 | xfree(string); |
454 | } | |
455 | ||
396c147e | 456 | static void |
b6c7b7b7 | 457 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 458 | { |
459 | Buffer msg; | |
460 | int i; | |
dce9bac5 | 461 | |
b5e300c2 | 462 | buffer_init(&msg); |
f546c780 | 463 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 464 | buffer_put_int(&msg, id); |
465 | buffer_put_int(&msg, count); | |
a13880bb | 466 | debug("request %u: sent names count %d", id, count); |
b5e300c2 | 467 | for (i = 0; i < count; i++) { |
468 | buffer_put_cstring(&msg, stats[i].name); | |
469 | buffer_put_cstring(&msg, stats[i].long_name); | |
470 | encode_attrib(&msg, &stats[i].attrib); | |
471 | } | |
472 | send_msg(&msg); | |
473 | buffer_free(&msg); | |
474 | } | |
475 | ||
396c147e | 476 | static void |
b6c7b7b7 | 477 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 478 | { |
479 | Buffer msg; | |
dce9bac5 | 480 | |
a13880bb | 481 | debug("request %u: sent attrib have 0x%x", id, a->flags); |
b5e300c2 | 482 | buffer_init(&msg); |
f546c780 | 483 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 484 | buffer_put_int(&msg, id); |
485 | encode_attrib(&msg, a); | |
486 | send_msg(&msg); | |
487 | buffer_free(&msg); | |
488 | } | |
489 | ||
360b43ab | 490 | static void |
491 | send_statvfs(u_int32_t id, struct statvfs *st) | |
492 | { | |
493 | Buffer msg; | |
494 | u_int64_t flag; | |
495 | ||
496 | flag = (st->f_flag & ST_RDONLY) ? SSH2_FXE_STATVFS_ST_RDONLY : 0; | |
497 | flag |= (st->f_flag & ST_NOSUID) ? SSH2_FXE_STATVFS_ST_NOSUID : 0; | |
498 | ||
499 | buffer_init(&msg); | |
500 | buffer_put_char(&msg, SSH2_FXP_EXTENDED_REPLY); | |
501 | buffer_put_int(&msg, id); | |
7290afcb | 502 | buffer_put_int64(&msg, st->f_bsize); |
503 | buffer_put_int64(&msg, st->f_frsize); | |
360b43ab | 504 | buffer_put_int64(&msg, st->f_blocks); |
505 | buffer_put_int64(&msg, st->f_bfree); | |
506 | buffer_put_int64(&msg, st->f_bavail); | |
507 | buffer_put_int64(&msg, st->f_files); | |
508 | buffer_put_int64(&msg, st->f_ffree); | |
509 | buffer_put_int64(&msg, st->f_favail); | |
7a4f468b | 510 | buffer_put_int64(&msg, FSID_TO_ULONG(st->f_fsid)); |
7290afcb | 511 | buffer_put_int64(&msg, flag); |
512 | buffer_put_int64(&msg, st->f_namemax); | |
360b43ab | 513 | send_msg(&msg); |
514 | buffer_free(&msg); | |
515 | } | |
516 | ||
b5e300c2 | 517 | /* parse incoming */ |
518 | ||
396c147e | 519 | static void |
b5e300c2 | 520 | process_init(void) |
521 | { | |
522 | Buffer msg; | |
b5e300c2 | 523 | |
802d93bb | 524 | version = get_int(); |
a13880bb | 525 | verbose("received client version %d", version); |
b5e300c2 | 526 | buffer_init(&msg); |
f546c780 | 527 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
528 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
9fcc4e18 | 529 | /* POSIX rename extension */ |
530 | buffer_put_cstring(&msg, "posix-rename@openssh.com"); | |
531 | buffer_put_cstring(&msg, "1"); /* version */ | |
f8db3345 | 532 | /* statvfs extension */ |
360b43ab | 533 | buffer_put_cstring(&msg, "statvfs@openssh.com"); |
4f36159a | 534 | buffer_put_cstring(&msg, "2"); /* version */ |
f8db3345 | 535 | /* fstatvfs extension */ |
360b43ab | 536 | buffer_put_cstring(&msg, "fstatvfs@openssh.com"); |
4f36159a | 537 | buffer_put_cstring(&msg, "2"); /* version */ |
b5e300c2 | 538 | send_msg(&msg); |
539 | buffer_free(&msg); | |
540 | } | |
541 | ||
396c147e | 542 | static void |
b5e300c2 | 543 | process_open(void) |
544 | { | |
545 | u_int32_t id, pflags; | |
546 | Attrib *a; | |
547 | char *name; | |
f546c780 | 548 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 549 | |
550 | id = get_int(); | |
551 | name = get_string(NULL); | |
f546c780 | 552 | pflags = get_int(); /* portable flags */ |
26ddd377 | 553 | debug3("request %u: open flags %d", id, pflags); |
b5e300c2 | 554 | a = get_attrib(); |
555 | flags = flags_from_portable(pflags); | |
f546c780 | 556 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
a13880bb | 557 | logit("open \"%s\" flags %s mode 0%o", |
558 | name, string_from_portable(pflags), mode); | |
250caf33 | 559 | if (readonly && |
560 | ((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR)) | |
561 | status = SSH2_FX_PERMISSION_DENIED; | |
562 | else { | |
563 | fd = open(name, flags, mode); | |
564 | if (fd < 0) { | |
565 | status = errno_to_portable(errno); | |
b5e300c2 | 566 | } else { |
250caf33 | 567 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
568 | if (handle < 0) { | |
569 | close(fd); | |
570 | } else { | |
571 | send_handle(id, handle); | |
572 | status = SSH2_FX_OK; | |
573 | } | |
b5e300c2 | 574 | } |
575 | } | |
f546c780 | 576 | if (status != SSH2_FX_OK) |
b5e300c2 | 577 | send_status(id, status); |
578 | xfree(name); | |
579 | } | |
580 | ||
396c147e | 581 | static void |
b5e300c2 | 582 | process_close(void) |
583 | { | |
584 | u_int32_t id; | |
f546c780 | 585 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 586 | |
587 | id = get_int(); | |
588 | handle = get_handle(); | |
a13880bb | 589 | debug3("request %u: close handle %u", id, handle); |
590 | handle_log_close(handle, NULL); | |
b5e300c2 | 591 | ret = handle_close(handle); |
f546c780 | 592 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 593 | send_status(id, status); |
594 | } | |
595 | ||
396c147e | 596 | static void |
b5e300c2 | 597 | process_read(void) |
598 | { | |
599 | char buf[64*1024]; | |
f546c780 | 600 | u_int32_t id, len; |
601 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 602 | u_int64_t off; |
603 | ||
604 | id = get_int(); | |
605 | handle = get_handle(); | |
f546c780 | 606 | off = get_int64(); |
b5e300c2 | 607 | len = get_int(); |
608 | ||
a13880bb | 609 | debug("request %u: read \"%s\" (handle %d) off %llu len %d", |
610 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 611 | if (len > sizeof buf) { |
612 | len = sizeof buf; | |
a13880bb | 613 | debug2("read change len %d", len); |
b5e300c2 | 614 | } |
615 | fd = handle_to_fd(handle); | |
616 | if (fd >= 0) { | |
617 | if (lseek(fd, off, SEEK_SET) < 0) { | |
618 | error("process_read: seek failed"); | |
619 | status = errno_to_portable(errno); | |
620 | } else { | |
621 | ret = read(fd, buf, len); | |
622 | if (ret < 0) { | |
623 | status = errno_to_portable(errno); | |
624 | } else if (ret == 0) { | |
f546c780 | 625 | status = SSH2_FX_EOF; |
b5e300c2 | 626 | } else { |
627 | send_data(id, buf, ret); | |
f546c780 | 628 | status = SSH2_FX_OK; |
a13880bb | 629 | handle_update_read(handle, ret); |
b5e300c2 | 630 | } |
631 | } | |
632 | } | |
f546c780 | 633 | if (status != SSH2_FX_OK) |
b5e300c2 | 634 | send_status(id, status); |
635 | } | |
636 | ||
396c147e | 637 | static void |
b5e300c2 | 638 | process_write(void) |
639 | { | |
f546c780 | 640 | u_int32_t id; |
b5e300c2 | 641 | u_int64_t off; |
bcbf86ec | 642 | u_int len; |
250caf33 | 643 | int handle, fd, ret, status; |
b5e300c2 | 644 | char *data; |
645 | ||
646 | id = get_int(); | |
647 | handle = get_handle(); | |
f546c780 | 648 | off = get_int64(); |
b5e300c2 | 649 | data = get_string(&len); |
650 | ||
a13880bb | 651 | debug("request %u: write \"%s\" (handle %d) off %llu len %d", |
652 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 653 | fd = handle_to_fd(handle); |
250caf33 | 654 | |
655 | if (fd < 0) | |
656 | status = SSH2_FX_FAILURE; | |
657 | else if (readonly) | |
658 | status = SSH2_FX_PERMISSION_DENIED; | |
659 | else { | |
b5e300c2 | 660 | if (lseek(fd, off, SEEK_SET) < 0) { |
661 | status = errno_to_portable(errno); | |
662 | error("process_write: seek failed"); | |
663 | } else { | |
664 | /* XXX ATOMICIO ? */ | |
665 | ret = write(fd, data, len); | |
2ceb8101 | 666 | if (ret < 0) { |
b5e300c2 | 667 | error("process_write: write failed"); |
668 | status = errno_to_portable(errno); | |
2ceb8101 | 669 | } else if ((size_t)ret == len) { |
f546c780 | 670 | status = SSH2_FX_OK; |
a13880bb | 671 | handle_update_write(handle, ret); |
b5e300c2 | 672 | } else { |
a13880bb | 673 | debug2("nothing at all written"); |
250caf33 | 674 | status = SSH2_FX_FAILURE; |
b5e300c2 | 675 | } |
676 | } | |
677 | } | |
678 | send_status(id, status); | |
679 | xfree(data); | |
680 | } | |
681 | ||
396c147e | 682 | static void |
b5e300c2 | 683 | process_do_stat(int do_lstat) |
684 | { | |
b5c334cc | 685 | Attrib a; |
b5e300c2 | 686 | struct stat st; |
687 | u_int32_t id; | |
688 | char *name; | |
f546c780 | 689 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 690 | |
691 | id = get_int(); | |
692 | name = get_string(NULL); | |
a13880bb | 693 | debug3("request %u: %sstat", id, do_lstat ? "l" : ""); |
694 | verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); | |
b5e300c2 | 695 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
696 | if (ret < 0) { | |
697 | status = errno_to_portable(errno); | |
698 | } else { | |
b5c334cc | 699 | stat_to_attrib(&st, &a); |
700 | send_attrib(id, &a); | |
f546c780 | 701 | status = SSH2_FX_OK; |
b5e300c2 | 702 | } |
f546c780 | 703 | if (status != SSH2_FX_OK) |
b5e300c2 | 704 | send_status(id, status); |
705 | xfree(name); | |
706 | } | |
707 | ||
396c147e | 708 | static void |
b5e300c2 | 709 | process_stat(void) |
710 | { | |
711 | process_do_stat(0); | |
712 | } | |
713 | ||
396c147e | 714 | static void |
b5e300c2 | 715 | process_lstat(void) |
716 | { | |
717 | process_do_stat(1); | |
718 | } | |
719 | ||
396c147e | 720 | static void |
b5e300c2 | 721 | process_fstat(void) |
722 | { | |
b5c334cc | 723 | Attrib a; |
b5e300c2 | 724 | struct stat st; |
725 | u_int32_t id; | |
f546c780 | 726 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 727 | |
728 | id = get_int(); | |
729 | handle = get_handle(); | |
a13880bb | 730 | debug("request %u: fstat \"%s\" (handle %u)", |
731 | id, handle_to_name(handle), handle); | |
b5e300c2 | 732 | fd = handle_to_fd(handle); |
9a24ac07 | 733 | if (fd >= 0) { |
b5e300c2 | 734 | ret = fstat(fd, &st); |
735 | if (ret < 0) { | |
736 | status = errno_to_portable(errno); | |
737 | } else { | |
b5c334cc | 738 | stat_to_attrib(&st, &a); |
739 | send_attrib(id, &a); | |
f546c780 | 740 | status = SSH2_FX_OK; |
b5e300c2 | 741 | } |
742 | } | |
f546c780 | 743 | if (status != SSH2_FX_OK) |
b5e300c2 | 744 | send_status(id, status); |
745 | } | |
746 | ||
396c147e | 747 | static struct timeval * |
b6c7b7b7 | 748 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 749 | { |
750 | static struct timeval tv[2]; | |
dce9bac5 | 751 | |
b5e300c2 | 752 | tv[0].tv_sec = a->atime; |
753 | tv[0].tv_usec = 0; | |
754 | tv[1].tv_sec = a->mtime; | |
755 | tv[1].tv_usec = 0; | |
756 | return tv; | |
757 | } | |
758 | ||
396c147e | 759 | static void |
b5e300c2 | 760 | process_setstat(void) |
761 | { | |
762 | Attrib *a; | |
763 | u_int32_t id; | |
764 | char *name; | |
9906a836 | 765 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 766 | |
767 | id = get_int(); | |
768 | name = get_string(NULL); | |
769 | a = get_attrib(); | |
a13880bb | 770 | debug("request %u: setstat name \"%s\"", id, name); |
250caf33 | 771 | if (readonly) { |
772 | status = SSH2_FX_PERMISSION_DENIED; | |
773 | a->flags = 0; | |
774 | } | |
cb476289 | 775 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
23983bf9 | 776 | logit("set \"%s\" size %llu", |
777 | name, (unsigned long long)a->size); | |
cb476289 | 778 | ret = truncate(name, a->size); |
779 | if (ret == -1) | |
780 | status = errno_to_portable(errno); | |
781 | } | |
f546c780 | 782 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 783 | logit("set \"%s\" mode %04o", name, a->perm); |
681efe9f | 784 | ret = chmod(name, a->perm & 07777); |
b5e300c2 | 785 | if (ret == -1) |
786 | status = errno_to_portable(errno); | |
787 | } | |
f546c780 | 788 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 789 | char buf[64]; |
790 | time_t t = a->mtime; | |
791 | ||
792 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
793 | localtime(&t)); | |
794 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 795 | ret = utimes(name, attrib_to_tv(a)); |
796 | if (ret == -1) | |
797 | status = errno_to_portable(errno); | |
798 | } | |
408ba72f | 799 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 800 | logit("set \"%s\" owner %lu group %lu", name, |
801 | (u_long)a->uid, (u_long)a->gid); | |
408ba72f | 802 | ret = chown(name, a->uid, a->gid); |
803 | if (ret == -1) | |
804 | status = errno_to_portable(errno); | |
805 | } | |
b5e300c2 | 806 | send_status(id, status); |
807 | xfree(name); | |
808 | } | |
809 | ||
396c147e | 810 | static void |
b5e300c2 | 811 | process_fsetstat(void) |
812 | { | |
813 | Attrib *a; | |
814 | u_int32_t id; | |
815 | int handle, fd, ret; | |
f546c780 | 816 | int status = SSH2_FX_OK; |
16e538d4 | 817 | |
b5e300c2 | 818 | id = get_int(); |
819 | handle = get_handle(); | |
820 | a = get_attrib(); | |
a13880bb | 821 | debug("request %u: fsetstat handle %d", id, handle); |
b5e300c2 | 822 | fd = handle_to_fd(handle); |
250caf33 | 823 | if (fd < 0) |
f546c780 | 824 | status = SSH2_FX_FAILURE; |
250caf33 | 825 | else if (readonly) |
826 | status = SSH2_FX_PERMISSION_DENIED; | |
827 | else { | |
a13880bb | 828 | char *name = handle_to_name(handle); |
829 | ||
cb476289 | 830 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
23983bf9 | 831 | logit("set \"%s\" size %llu", |
832 | name, (unsigned long long)a->size); | |
cb476289 | 833 | ret = ftruncate(fd, a->size); |
834 | if (ret == -1) | |
835 | status = errno_to_portable(errno); | |
836 | } | |
f546c780 | 837 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 838 | logit("set \"%s\" mode %04o", name, a->perm); |
2fd3c144 | 839 | #ifdef HAVE_FCHMOD |
681efe9f | 840 | ret = fchmod(fd, a->perm & 07777); |
2fd3c144 | 841 | #else |
681efe9f | 842 | ret = chmod(name, a->perm & 07777); |
2fd3c144 | 843 | #endif |
b5e300c2 | 844 | if (ret == -1) |
845 | status = errno_to_portable(errno); | |
846 | } | |
f546c780 | 847 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 848 | char buf[64]; |
849 | time_t t = a->mtime; | |
850 | ||
851 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
852 | localtime(&t)); | |
853 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 854 | #ifdef HAVE_FUTIMES |
855 | ret = futimes(fd, attrib_to_tv(a)); | |
856 | #else | |
857 | ret = utimes(name, attrib_to_tv(a)); | |
858 | #endif | |
859 | if (ret == -1) | |
860 | status = errno_to_portable(errno); | |
861 | } | |
408ba72f | 862 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 863 | logit("set \"%s\" owner %lu group %lu", name, |
864 | (u_long)a->uid, (u_long)a->gid); | |
01f13020 | 865 | #ifdef HAVE_FCHOWN |
408ba72f | 866 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 867 | #else |
868 | ret = chown(name, a->uid, a->gid); | |
869 | #endif | |
408ba72f | 870 | if (ret == -1) |
871 | status = errno_to_portable(errno); | |
872 | } | |
b5e300c2 | 873 | } |
874 | send_status(id, status); | |
875 | } | |
876 | ||
396c147e | 877 | static void |
b5e300c2 | 878 | process_opendir(void) |
879 | { | |
880 | DIR *dirp = NULL; | |
881 | char *path; | |
f546c780 | 882 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 883 | u_int32_t id; |
884 | ||
885 | id = get_int(); | |
886 | path = get_string(NULL); | |
a13880bb | 887 | debug3("request %u: opendir", id); |
888 | logit("opendir \"%s\"", path); | |
2b87da3b | 889 | dirp = opendir(path); |
b5e300c2 | 890 | if (dirp == NULL) { |
891 | status = errno_to_portable(errno); | |
892 | } else { | |
3e2f2431 | 893 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 894 | if (handle < 0) { |
895 | closedir(dirp); | |
896 | } else { | |
897 | send_handle(id, handle); | |
f546c780 | 898 | status = SSH2_FX_OK; |
b5e300c2 | 899 | } |
2b87da3b | 900 | |
b5e300c2 | 901 | } |
f546c780 | 902 | if (status != SSH2_FX_OK) |
b5e300c2 | 903 | send_status(id, status); |
904 | xfree(path); | |
905 | } | |
906 | ||
396c147e | 907 | static void |
b5e300c2 | 908 | process_readdir(void) |
909 | { | |
910 | DIR *dirp; | |
911 | struct dirent *dp; | |
912 | char *path; | |
913 | int handle; | |
914 | u_int32_t id; | |
915 | ||
916 | id = get_int(); | |
917 | handle = get_handle(); | |
a13880bb | 918 | debug("request %u: readdir \"%s\" (handle %d)", id, |
919 | handle_to_name(handle), handle); | |
b5e300c2 | 920 | dirp = handle_to_dir(handle); |
921 | path = handle_to_name(handle); | |
922 | if (dirp == NULL || path == NULL) { | |
f546c780 | 923 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 924 | } else { |
b5e300c2 | 925 | struct stat st; |
a13880bb | 926 | char pathname[MAXPATHLEN]; |
b5e300c2 | 927 | Stat *stats; |
928 | int nstats = 10, count = 0, i; | |
9906a836 | 929 | |
52e3daed | 930 | stats = xcalloc(nstats, sizeof(Stat)); |
b5e300c2 | 931 | while ((dp = readdir(dirp)) != NULL) { |
932 | if (count >= nstats) { | |
933 | nstats *= 2; | |
c5d10563 | 934 | stats = xrealloc(stats, nstats, sizeof(Stat)); |
b5e300c2 | 935 | } |
936 | /* XXX OVERFLOW ? */ | |
88690211 | 937 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
938 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 939 | if (lstat(pathname, &st) < 0) |
940 | continue; | |
b5c334cc | 941 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 942 | stats[count].name = xstrdup(dp->d_name); |
29793ade | 943 | stats[count].long_name = ls_file(dp->d_name, &st, 0, 0); |
b5e300c2 | 944 | count++; |
945 | /* send up to 100 entries in one message */ | |
b5c334cc | 946 | /* XXX check packet size instead */ |
b5e300c2 | 947 | if (count == 100) |
948 | break; | |
949 | } | |
f546c780 | 950 | if (count > 0) { |
951 | send_names(id, count, stats); | |
184eed6a | 952 | for (i = 0; i < count; i++) { |
f546c780 | 953 | xfree(stats[i].name); |
954 | xfree(stats[i].long_name); | |
955 | } | |
956 | } else { | |
957 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 958 | } |
959 | xfree(stats); | |
960 | } | |
961 | } | |
962 | ||
396c147e | 963 | static void |
b5e300c2 | 964 | process_remove(void) |
965 | { | |
966 | char *name; | |
967 | u_int32_t id; | |
f546c780 | 968 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 969 | int ret; |
970 | ||
971 | id = get_int(); | |
972 | name = get_string(NULL); | |
a13880bb | 973 | debug3("request %u: remove", id); |
974 | logit("remove name \"%s\"", name); | |
250caf33 | 975 | if (readonly) |
976 | status = SSH2_FX_PERMISSION_DENIED; | |
977 | else { | |
978 | ret = unlink(name); | |
979 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
980 | } | |
b5e300c2 | 981 | send_status(id, status); |
982 | xfree(name); | |
983 | } | |
984 | ||
396c147e | 985 | static void |
b5e300c2 | 986 | process_mkdir(void) |
987 | { | |
988 | Attrib *a; | |
989 | u_int32_t id; | |
990 | char *name; | |
f546c780 | 991 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 992 | |
993 | id = get_int(); | |
994 | name = get_string(NULL); | |
995 | a = get_attrib(); | |
f546c780 | 996 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
681efe9f | 997 | a->perm & 07777 : 0777; |
a13880bb | 998 | debug3("request %u: mkdir", id); |
999 | logit("mkdir name \"%s\" mode 0%o", name, mode); | |
250caf33 | 1000 | if (readonly) |
1001 | status = SSH2_FX_PERMISSION_DENIED; | |
1002 | else { | |
1003 | ret = mkdir(name, mode); | |
1004 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
1005 | } | |
b5e300c2 | 1006 | send_status(id, status); |
1007 | xfree(name); | |
1008 | } | |
1009 | ||
396c147e | 1010 | static void |
b5e300c2 | 1011 | process_rmdir(void) |
1012 | { | |
1013 | u_int32_t id; | |
1014 | char *name; | |
1015 | int ret, status; | |
1016 | ||
1017 | id = get_int(); | |
1018 | name = get_string(NULL); | |
a13880bb | 1019 | debug3("request %u: rmdir", id); |
1020 | logit("rmdir name \"%s\"", name); | |
250caf33 | 1021 | if (readonly) |
1022 | status = SSH2_FX_PERMISSION_DENIED; | |
1023 | else { | |
1024 | ret = rmdir(name); | |
1025 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
1026 | } | |
b5e300c2 | 1027 | send_status(id, status); |
1028 | xfree(name); | |
1029 | } | |
1030 | ||
396c147e | 1031 | static void |
b5e300c2 | 1032 | process_realpath(void) |
1033 | { | |
1034 | char resolvedname[MAXPATHLEN]; | |
1035 | u_int32_t id; | |
1036 | char *path; | |
1037 | ||
1038 | id = get_int(); | |
1039 | path = get_string(NULL); | |
6b523bae | 1040 | if (path[0] == '\0') { |
1041 | xfree(path); | |
1042 | path = xstrdup("."); | |
1043 | } | |
a13880bb | 1044 | debug3("request %u: realpath", id); |
1045 | verbose("realpath \"%s\"", path); | |
b5e300c2 | 1046 | if (realpath(path, resolvedname) == NULL) { |
1047 | send_status(id, errno_to_portable(errno)); | |
1048 | } else { | |
1049 | Stat s; | |
1050 | attrib_clear(&s.attrib); | |
1051 | s.name = s.long_name = resolvedname; | |
1052 | send_names(id, 1, &s); | |
1053 | } | |
1054 | xfree(path); | |
1055 | } | |
1056 | ||
396c147e | 1057 | static void |
b5e300c2 | 1058 | process_rename(void) |
1059 | { | |
1060 | u_int32_t id; | |
1061 | char *oldpath, *newpath; | |
f2f28f1f | 1062 | int status; |
fd77a40f | 1063 | struct stat sb; |
b5e300c2 | 1064 | |
1065 | id = get_int(); | |
1066 | oldpath = get_string(NULL); | |
1067 | newpath = get_string(NULL); | |
a13880bb | 1068 | debug3("request %u: rename", id); |
1069 | logit("rename old \"%s\" new \"%s\"", oldpath, newpath); | |
fd77a40f | 1070 | status = SSH2_FX_FAILURE; |
250caf33 | 1071 | if (readonly) |
1072 | status = SSH2_FX_PERMISSION_DENIED; | |
1073 | else if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 1074 | status = errno_to_portable(errno); |
fd77a40f | 1075 | else if (S_ISREG(sb.st_mode)) { |
1076 | /* Race-free rename of regular files */ | |
dc5888bf | 1077 | if (link(oldpath, newpath) == -1) { |
6ecb350f | 1078 | if (errno == EOPNOTSUPP || errno == ENOSYS |
97e61398 | 1079 | #ifdef EXDEV |
1080 | || errno == EXDEV | |
1081 | #endif | |
cd698186 | 1082 | #ifdef LINK_OPNOTSUPP_ERRNO |
1083 | || errno == LINK_OPNOTSUPP_ERRNO | |
1084 | #endif | |
1085 | ) { | |
dc5888bf | 1086 | struct stat st; |
1087 | ||
1088 | /* | |
1089 | * fs doesn't support links, so fall back to | |
1090 | * stat+rename. This is racy. | |
1091 | */ | |
1092 | if (stat(newpath, &st) == -1) { | |
1093 | if (rename(oldpath, newpath) == -1) | |
1094 | status = | |
1095 | errno_to_portable(errno); | |
1096 | else | |
1097 | status = SSH2_FX_OK; | |
1098 | } | |
1099 | } else { | |
1100 | status = errno_to_portable(errno); | |
1101 | } | |
1102 | } else if (unlink(oldpath) == -1) { | |
fd77a40f | 1103 | status = errno_to_portable(errno); |
1104 | /* clean spare link */ | |
1105 | unlink(newpath); | |
1106 | } else | |
1107 | status = SSH2_FX_OK; | |
1108 | } else if (stat(newpath, &sb) == -1) { | |
1109 | if (rename(oldpath, newpath) == -1) | |
1110 | status = errno_to_portable(errno); | |
1111 | else | |
1112 | status = SSH2_FX_OK; | |
1113 | } | |
b5e300c2 | 1114 | send_status(id, status); |
1115 | xfree(oldpath); | |
1116 | xfree(newpath); | |
1117 | } | |
1118 | ||
396c147e | 1119 | static void |
3a7fe5ba | 1120 | process_readlink(void) |
1121 | { | |
1122 | u_int32_t id; | |
362df52e | 1123 | int len; |
ca75d7de | 1124 | char buf[MAXPATHLEN]; |
3a7fe5ba | 1125 | char *path; |
1126 | ||
1127 | id = get_int(); | |
1128 | path = get_string(NULL); | |
a13880bb | 1129 | debug3("request %u: readlink", id); |
1130 | verbose("readlink \"%s\"", path); | |
ca75d7de | 1131 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3a7fe5ba | 1132 | send_status(id, errno_to_portable(errno)); |
1133 | else { | |
1134 | Stat s; | |
184eed6a | 1135 | |
ca75d7de | 1136 | buf[len] = '\0'; |
3a7fe5ba | 1137 | attrib_clear(&s.attrib); |
ca75d7de | 1138 | s.name = s.long_name = buf; |
3a7fe5ba | 1139 | send_names(id, 1, &s); |
1140 | } | |
1141 | xfree(path); | |
1142 | } | |
1143 | ||
396c147e | 1144 | static void |
3a7fe5ba | 1145 | process_symlink(void) |
1146 | { | |
1147 | u_int32_t id; | |
3a7fe5ba | 1148 | char *oldpath, *newpath; |
f2f28f1f | 1149 | int ret, status; |
3a7fe5ba | 1150 | |
1151 | id = get_int(); | |
1152 | oldpath = get_string(NULL); | |
1153 | newpath = get_string(NULL); | |
a13880bb | 1154 | debug3("request %u: symlink", id); |
1155 | logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); | |
f2f28f1f | 1156 | /* this will fail if 'newpath' exists */ |
250caf33 | 1157 | if (readonly) |
1158 | status = SSH2_FX_PERMISSION_DENIED; | |
1159 | else { | |
1160 | ret = symlink(oldpath, newpath); | |
1161 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
1162 | } | |
3a7fe5ba | 1163 | send_status(id, status); |
1164 | xfree(oldpath); | |
1165 | xfree(newpath); | |
1166 | } | |
1167 | ||
9fcc4e18 | 1168 | static void |
1169 | process_extended_posix_rename(u_int32_t id) | |
1170 | { | |
1171 | char *oldpath, *newpath; | |
250caf33 | 1172 | int ret, status; |
9fcc4e18 | 1173 | |
1174 | oldpath = get_string(NULL); | |
1175 | newpath = get_string(NULL); | |
1176 | debug3("request %u: posix-rename", id); | |
1177 | logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath); | |
250caf33 | 1178 | if (readonly) |
1179 | status = SSH2_FX_PERMISSION_DENIED; | |
1180 | else { | |
1181 | ret = rename(oldpath, newpath); | |
1182 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
1183 | } | |
1184 | send_status(id, status); | |
9fcc4e18 | 1185 | xfree(oldpath); |
1186 | xfree(newpath); | |
1187 | } | |
1188 | ||
360b43ab | 1189 | static void |
1190 | process_extended_statvfs(u_int32_t id) | |
1191 | { | |
1192 | char *path; | |
1193 | struct statvfs st; | |
1194 | ||
1195 | path = get_string(NULL); | |
1196 | debug3("request %u: statfs", id); | |
1197 | logit("statfs \"%s\"", path); | |
1198 | ||
1199 | if (statvfs(path, &st) != 0) | |
1200 | send_status(id, errno_to_portable(errno)); | |
1201 | else | |
1202 | send_statvfs(id, &st); | |
1203 | xfree(path); | |
1204 | } | |
1205 | ||
1206 | static void | |
1207 | process_extended_fstatvfs(u_int32_t id) | |
1208 | { | |
1209 | int handle, fd; | |
1210 | struct statvfs st; | |
1211 | ||
1212 | handle = get_handle(); | |
1213 | debug("request %u: fstatvfs \"%s\" (handle %u)", | |
1214 | id, handle_to_name(handle), handle); | |
1215 | if ((fd = handle_to_fd(handle)) < 0) { | |
1216 | send_status(id, SSH2_FX_FAILURE); | |
1217 | return; | |
1218 | } | |
1219 | if (fstatvfs(fd, &st) != 0) | |
1220 | send_status(id, errno_to_portable(errno)); | |
1221 | else | |
1222 | send_statvfs(id, &st); | |
1223 | } | |
1224 | ||
396c147e | 1225 | static void |
f546c780 | 1226 | process_extended(void) |
1227 | { | |
1228 | u_int32_t id; | |
1229 | char *request; | |
1230 | ||
1231 | id = get_int(); | |
1232 | request = get_string(NULL); | |
9fcc4e18 | 1233 | if (strcmp(request, "posix-rename@openssh.com") == 0) |
1234 | process_extended_posix_rename(id); | |
360b43ab | 1235 | else if (strcmp(request, "statvfs@openssh.com") == 0) |
1236 | process_extended_statvfs(id); | |
1237 | else if (strcmp(request, "fstatvfs@openssh.com") == 0) | |
1238 | process_extended_fstatvfs(id); | |
9fcc4e18 | 1239 | else |
1240 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
f546c780 | 1241 | xfree(request); |
1242 | } | |
b5e300c2 | 1243 | |
1244 | /* stolen from ssh-agent */ | |
1245 | ||
396c147e | 1246 | static void |
b5e300c2 | 1247 | process(void) |
1248 | { | |
1e3b8b07 | 1249 | u_int msg_len; |
9b4ac641 | 1250 | u_int buf_len; |
1251 | u_int consumed; | |
1e3b8b07 | 1252 | u_int type; |
1253 | u_char *cp; | |
b5e300c2 | 1254 | |
9b4ac641 | 1255 | buf_len = buffer_len(&iqueue); |
1256 | if (buf_len < 5) | |
b5e300c2 | 1257 | return; /* Incomplete message. */ |
20905a8e | 1258 | cp = buffer_ptr(&iqueue); |
51e7a012 | 1259 | msg_len = get_u32(cp); |
3eee3b86 | 1260 | if (msg_len > SFTP_MAX_MSG_LENGTH) { |
a13880bb | 1261 | error("bad message from %s local user %s", |
1262 | client_addr, pw->pw_name); | |
c33ba17e | 1263 | sftp_server_cleanup_exit(11); |
b5e300c2 | 1264 | } |
9b4ac641 | 1265 | if (buf_len < msg_len + 4) |
b5e300c2 | 1266 | return; |
1267 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 1268 | buf_len -= 4; |
b5e300c2 | 1269 | type = buffer_get_char(&iqueue); |
1270 | switch (type) { | |
f546c780 | 1271 | case SSH2_FXP_INIT: |
b5e300c2 | 1272 | process_init(); |
1273 | break; | |
f546c780 | 1274 | case SSH2_FXP_OPEN: |
b5e300c2 | 1275 | process_open(); |
1276 | break; | |
f546c780 | 1277 | case SSH2_FXP_CLOSE: |
b5e300c2 | 1278 | process_close(); |
1279 | break; | |
f546c780 | 1280 | case SSH2_FXP_READ: |
b5e300c2 | 1281 | process_read(); |
1282 | break; | |
f546c780 | 1283 | case SSH2_FXP_WRITE: |
b5e300c2 | 1284 | process_write(); |
1285 | break; | |
f546c780 | 1286 | case SSH2_FXP_LSTAT: |
b5e300c2 | 1287 | process_lstat(); |
1288 | break; | |
f546c780 | 1289 | case SSH2_FXP_FSTAT: |
b5e300c2 | 1290 | process_fstat(); |
1291 | break; | |
f546c780 | 1292 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 1293 | process_setstat(); |
1294 | break; | |
f546c780 | 1295 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 1296 | process_fsetstat(); |
1297 | break; | |
f546c780 | 1298 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 1299 | process_opendir(); |
1300 | break; | |
f546c780 | 1301 | case SSH2_FXP_READDIR: |
b5e300c2 | 1302 | process_readdir(); |
1303 | break; | |
f546c780 | 1304 | case SSH2_FXP_REMOVE: |
b5e300c2 | 1305 | process_remove(); |
1306 | break; | |
f546c780 | 1307 | case SSH2_FXP_MKDIR: |
b5e300c2 | 1308 | process_mkdir(); |
1309 | break; | |
f546c780 | 1310 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1311 | process_rmdir(); |
1312 | break; | |
f546c780 | 1313 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1314 | process_realpath(); |
1315 | break; | |
f546c780 | 1316 | case SSH2_FXP_STAT: |
b5e300c2 | 1317 | process_stat(); |
1318 | break; | |
f546c780 | 1319 | case SSH2_FXP_RENAME: |
b5e300c2 | 1320 | process_rename(); |
1321 | break; | |
3a7fe5ba | 1322 | case SSH2_FXP_READLINK: |
1323 | process_readlink(); | |
1324 | break; | |
1325 | case SSH2_FXP_SYMLINK: | |
1326 | process_symlink(); | |
1327 | break; | |
f546c780 | 1328 | case SSH2_FXP_EXTENDED: |
1329 | process_extended(); | |
1330 | break; | |
b5e300c2 | 1331 | default: |
1332 | error("Unknown message %d", type); | |
1333 | break; | |
1334 | } | |
9b4ac641 | 1335 | /* discard the remaining bytes from the current packet */ |
c33ba17e | 1336 | if (buf_len < buffer_len(&iqueue)) { |
1337 | error("iqueue grew unexpectedly"); | |
1338 | sftp_server_cleanup_exit(255); | |
1339 | } | |
9b4ac641 | 1340 | consumed = buf_len - buffer_len(&iqueue); |
c33ba17e | 1341 | if (msg_len < consumed) { |
1342 | error("msg_len %d < consumed %d", msg_len, consumed); | |
1343 | sftp_server_cleanup_exit(255); | |
1344 | } | |
9b4ac641 | 1345 | if (msg_len > consumed) |
1346 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1347 | } |
1348 | ||
a13880bb | 1349 | /* Cleanup handler that logs active handles upon normal exit */ |
1350 | void | |
c33ba17e | 1351 | sftp_server_cleanup_exit(int i) |
a13880bb | 1352 | { |
1353 | if (pw != NULL && client_addr != NULL) { | |
1354 | handle_log_exit(); | |
1355 | logit("session closed for local user %s from [%s]", | |
1356 | pw->pw_name, client_addr); | |
1357 | } | |
1358 | _exit(i); | |
1359 | } | |
1360 | ||
1361 | static void | |
c33ba17e | 1362 | sftp_server_usage(void) |
a13880bb | 1363 | { |
1364 | extern char *__progname; | |
1365 | ||
1366 | fprintf(stderr, | |
250caf33 | 1367 | "usage: %s [-ehR] [-f log_facility] [-l log_level] [-u umask]\n", |
99c5cf8e | 1368 | __progname); |
a13880bb | 1369 | exit(1); |
1370 | } | |
1371 | ||
b5e300c2 | 1372 | int |
db49deeb | 1373 | sftp_server_main(int argc, char **argv, struct passwd *user_pw) |
b5e300c2 | 1374 | { |
c8d75031 | 1375 | fd_set *rset, *wset; |
a13880bb | 1376 | int in, out, max, ch, skipargs = 0, log_stderr = 0; |
c8d75031 | 1377 | ssize_t len, olen, set_size; |
a13880bb | 1378 | SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; |
72dea2d9 | 1379 | char *cp, buf[4*4096]; |
99c5cf8e | 1380 | const char *errmsg; |
1381 | mode_t mask; | |
a13880bb | 1382 | |
a13880bb | 1383 | extern char *optarg; |
1384 | extern char *__progname; | |
b5e300c2 | 1385 | |
a13880bb | 1386 | __progname = ssh_get_progname(argv[0]); |
1387 | log_init(__progname, log_level, log_facility, log_stderr); | |
1388 | ||
250caf33 | 1389 | while (!skipargs && (ch = getopt(argc, argv, "f:l:u:cehR")) != -1) { |
a13880bb | 1390 | switch (ch) { |
250caf33 | 1391 | case 'R': |
1392 | readonly = 1; | |
1393 | break; | |
a13880bb | 1394 | case 'c': |
1395 | /* | |
1396 | * Ignore all arguments if we are invoked as a | |
31652869 | 1397 | * shell using "sftp-server -c command" |
a13880bb | 1398 | */ |
1399 | skipargs = 1; | |
1400 | break; | |
1401 | case 'e': | |
1402 | log_stderr = 1; | |
1403 | break; | |
1404 | case 'l': | |
1405 | log_level = log_level_number(optarg); | |
1406 | if (log_level == SYSLOG_LEVEL_NOT_SET) | |
1407 | error("Invalid log level \"%s\"", optarg); | |
1408 | break; | |
1409 | case 'f': | |
1410 | log_facility = log_facility_number(optarg); | |
f8f7ecf5 | 1411 | if (log_facility == SYSLOG_FACILITY_NOT_SET) |
a13880bb | 1412 | error("Invalid log facility \"%s\"", optarg); |
1413 | break; | |
99c5cf8e | 1414 | case 'u': |
1415 | mask = (mode_t)strtonum(optarg, 0, 0777, &errmsg); | |
57a6b5dd | 1416 | if (errmsg != NULL) |
99c5cf8e | 1417 | fatal("Invalid umask \"%s\": %s", |
1418 | optarg, errmsg); | |
1419 | (void)umask(mask); | |
1420 | break; | |
a13880bb | 1421 | case 'h': |
1422 | default: | |
c33ba17e | 1423 | sftp_server_usage(); |
a13880bb | 1424 | } |
1425 | } | |
61b3a2bc | 1426 | |
a13880bb | 1427 | log_init(__progname, log_level, log_facility, log_stderr); |
b5e300c2 | 1428 | |
a13880bb | 1429 | if ((cp = getenv("SSH_CONNECTION")) != NULL) { |
1430 | client_addr = xstrdup(cp); | |
c33ba17e | 1431 | if ((cp = strchr(client_addr, ' ')) == NULL) { |
1432 | error("Malformed SSH_CONNECTION variable: \"%s\"", | |
a13880bb | 1433 | getenv("SSH_CONNECTION")); |
c33ba17e | 1434 | sftp_server_cleanup_exit(255); |
1435 | } | |
a13880bb | 1436 | *cp = '\0'; |
1437 | } else | |
1438 | client_addr = xstrdup("UNKNOWN"); | |
1439 | ||
db49deeb | 1440 | pw = pwcopy(user_pw); |
a13880bb | 1441 | |
1442 | logit("session opened for local user %s from [%s]", | |
1443 | pw->pw_name, client_addr); | |
1444 | ||
d4b8c904 | 1445 | in = STDIN_FILENO; |
1446 | out = STDOUT_FILENO; | |
b5e300c2 | 1447 | |
fe56c12b | 1448 | #ifdef HAVE_CYGWIN |
1449 | setmode(in, O_BINARY); | |
1450 | setmode(out, O_BINARY); | |
1451 | #endif | |
1452 | ||
b5e300c2 | 1453 | max = 0; |
1454 | if (in > max) | |
1455 | max = in; | |
1456 | if (out > max) | |
1457 | max = out; | |
1458 | ||
1459 | buffer_init(&iqueue); | |
1460 | buffer_init(&oqueue); | |
1461 | ||
c8d75031 | 1462 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1463 | rset = (fd_set *)xmalloc(set_size); | |
1464 | wset = (fd_set *)xmalloc(set_size); | |
1465 | ||
b5e300c2 | 1466 | for (;;) { |
c8d75031 | 1467 | memset(rset, 0, set_size); |
1468 | memset(wset, 0, set_size); | |
b5e300c2 | 1469 | |
72dea2d9 | 1470 | /* |
1471 | * Ensure that we can read a full buffer and handle | |
1472 | * the worst-case length packet it can generate, | |
1473 | * otherwise apply backpressure by stopping reads. | |
1474 | */ | |
1475 | if (buffer_check_alloc(&iqueue, sizeof(buf)) && | |
1476 | buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) | |
1477 | FD_SET(in, rset); | |
1478 | ||
b5e300c2 | 1479 | olen = buffer_len(&oqueue); |
1480 | if (olen > 0) | |
c8d75031 | 1481 | FD_SET(out, wset); |
b5e300c2 | 1482 | |
c8d75031 | 1483 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1484 | if (errno == EINTR) |
1485 | continue; | |
a13880bb | 1486 | error("select: %s", strerror(errno)); |
c33ba17e | 1487 | sftp_server_cleanup_exit(2); |
b5e300c2 | 1488 | } |
1489 | ||
1490 | /* copy stdin to iqueue */ | |
c8d75031 | 1491 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1492 | len = read(in, buf, sizeof buf); |
1493 | if (len == 0) { | |
1494 | debug("read eof"); | |
c33ba17e | 1495 | sftp_server_cleanup_exit(0); |
b5e300c2 | 1496 | } else if (len < 0) { |
a13880bb | 1497 | error("read: %s", strerror(errno)); |
c33ba17e | 1498 | sftp_server_cleanup_exit(1); |
b5e300c2 | 1499 | } else { |
1500 | buffer_append(&iqueue, buf, len); | |
1501 | } | |
1502 | } | |
1503 | /* send oqueue to stdout */ | |
c8d75031 | 1504 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1505 | len = write(out, buffer_ptr(&oqueue), olen); |
1506 | if (len < 0) { | |
a13880bb | 1507 | error("write: %s", strerror(errno)); |
c33ba17e | 1508 | sftp_server_cleanup_exit(1); |
b5e300c2 | 1509 | } else { |
1510 | buffer_consume(&oqueue, len); | |
1511 | } | |
1512 | } | |
72dea2d9 | 1513 | |
1514 | /* | |
1515 | * Process requests from client if we can fit the results | |
1516 | * into the output buffer, otherwise stop processing input | |
1517 | * and let the output queue drain. | |
1518 | */ | |
1519 | if (buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) | |
1520 | process(); | |
b5e300c2 | 1521 | } |
1522 | } |