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57a6b5dd | 1 | /* $OpenBSD: sftp-server.c,v 1.87 2009/08/31 20:56:02 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 | ||
d7ded285 | 73 | /* portable attributes, etc. */ |
b5e300c2 | 74 | |
b5e300c2 | 75 | typedef struct Stat Stat; |
76 | ||
61e96248 | 77 | struct Stat { |
b5e300c2 | 78 | char *name; |
79 | char *long_name; | |
80 | Attrib attrib; | |
81 | }; | |
82 | ||
396c147e | 83 | static int |
b5e300c2 | 84 | errno_to_portable(int unixerrno) |
85 | { | |
86 | int ret = 0; | |
dce9bac5 | 87 | |
b5e300c2 | 88 | switch (unixerrno) { |
89 | case 0: | |
f546c780 | 90 | ret = SSH2_FX_OK; |
b5e300c2 | 91 | break; |
92 | case ENOENT: | |
93 | case ENOTDIR: | |
94 | case EBADF: | |
95 | case ELOOP: | |
f546c780 | 96 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 97 | break; |
98 | case EPERM: | |
99 | case EACCES: | |
100 | case EFAULT: | |
f546c780 | 101 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 102 | break; |
103 | case ENAMETOOLONG: | |
104 | case EINVAL: | |
f546c780 | 105 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 106 | break; |
10e804f4 | 107 | case ENOSYS: |
108 | ret = SSH2_FX_OP_UNSUPPORTED; | |
109 | break; | |
b5e300c2 | 110 | default: |
f546c780 | 111 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 112 | break; |
113 | } | |
114 | return ret; | |
115 | } | |
116 | ||
396c147e | 117 | static int |
b5e300c2 | 118 | flags_from_portable(int pflags) |
119 | { | |
120 | int flags = 0; | |
dce9bac5 | 121 | |
79ddf6db | 122 | if ((pflags & SSH2_FXF_READ) && |
123 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 124 | flags = O_RDWR; |
f546c780 | 125 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 126 | flags = O_RDONLY; |
f546c780 | 127 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 128 | flags = O_WRONLY; |
129 | } | |
f546c780 | 130 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 131 | flags |= O_CREAT; |
f546c780 | 132 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 133 | flags |= O_TRUNC; |
f546c780 | 134 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 135 | flags |= O_EXCL; |
136 | return flags; | |
137 | } | |
138 | ||
a13880bb | 139 | static const char * |
140 | string_from_portable(int pflags) | |
141 | { | |
142 | static char ret[128]; | |
143 | ||
144 | *ret = '\0'; | |
145 | ||
146 | #define PAPPEND(str) { \ | |
147 | if (*ret != '\0') \ | |
148 | strlcat(ret, ",", sizeof(ret)); \ | |
31652869 | 149 | strlcat(ret, str, sizeof(ret)); \ |
a13880bb | 150 | } |
151 | ||
152 | if (pflags & SSH2_FXF_READ) | |
153 | PAPPEND("READ") | |
154 | if (pflags & SSH2_FXF_WRITE) | |
155 | PAPPEND("WRITE") | |
156 | if (pflags & SSH2_FXF_CREAT) | |
157 | PAPPEND("CREATE") | |
158 | if (pflags & SSH2_FXF_TRUNC) | |
159 | PAPPEND("TRUNCATE") | |
160 | if (pflags & SSH2_FXF_EXCL) | |
161 | PAPPEND("EXCL") | |
162 | ||
163 | return ret; | |
164 | } | |
165 | ||
396c147e | 166 | static Attrib * |
b5e300c2 | 167 | get_attrib(void) |
168 | { | |
169 | return decode_attrib(&iqueue); | |
170 | } | |
171 | ||
172 | /* handle handles */ | |
173 | ||
174 | typedef struct Handle Handle; | |
175 | struct Handle { | |
176 | int use; | |
177 | DIR *dirp; | |
178 | int fd; | |
179 | char *name; | |
a13880bb | 180 | u_int64_t bytes_read, bytes_write; |
b4bbe43c | 181 | int next_unused; |
b5e300c2 | 182 | }; |
dce9bac5 | 183 | |
b5e300c2 | 184 | enum { |
185 | HANDLE_UNUSED, | |
186 | HANDLE_DIR, | |
187 | HANDLE_FILE | |
188 | }; | |
dce9bac5 | 189 | |
b4bbe43c | 190 | Handle *handles = NULL; |
191 | u_int num_handles = 0; | |
192 | int first_unused_handle = -1; | |
b5e300c2 | 193 | |
b4bbe43c | 194 | static void handle_unused(int i) |
b5e300c2 | 195 | { |
b4bbe43c | 196 | handles[i].use = HANDLE_UNUSED; |
197 | handles[i].next_unused = first_unused_handle; | |
198 | first_unused_handle = i; | |
b5e300c2 | 199 | } |
200 | ||
396c147e | 201 | static int |
b6c7b7b7 | 202 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 203 | { |
b4bbe43c | 204 | int i; |
dce9bac5 | 205 | |
b4bbe43c | 206 | if (first_unused_handle == -1) { |
207 | if (num_handles + 1 <= num_handles) | |
208 | return -1; | |
209 | num_handles++; | |
210 | handles = xrealloc(handles, num_handles, sizeof(Handle)); | |
211 | handle_unused(num_handles - 1); | |
b5e300c2 | 212 | } |
b4bbe43c | 213 | |
214 | i = first_unused_handle; | |
215 | first_unused_handle = handles[i].next_unused; | |
216 | ||
217 | handles[i].use = use; | |
218 | handles[i].dirp = dirp; | |
219 | handles[i].fd = fd; | |
220 | handles[i].name = xstrdup(name); | |
221 | handles[i].bytes_read = handles[i].bytes_write = 0; | |
222 | ||
223 | return i; | |
b5e300c2 | 224 | } |
225 | ||
396c147e | 226 | static int |
b5e300c2 | 227 | handle_is_ok(int i, int type) |
228 | { | |
b4bbe43c | 229 | return i >= 0 && (u_int)i < num_handles && handles[i].use == type; |
b5e300c2 | 230 | } |
231 | ||
396c147e | 232 | static int |
b5e300c2 | 233 | handle_to_string(int handle, char **stringp, int *hlenp) |
234 | { | |
b5e300c2 | 235 | if (stringp == NULL || hlenp == NULL) |
236 | return -1; | |
b5c334cc | 237 | *stringp = xmalloc(sizeof(int32_t)); |
51e7a012 | 238 | put_u32(*stringp, handle); |
b5c334cc | 239 | *hlenp = sizeof(int32_t); |
b5e300c2 | 240 | return 0; |
241 | } | |
242 | ||
396c147e | 243 | static int |
b6c7b7b7 | 244 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 245 | { |
b5c334cc | 246 | int val; |
dce9bac5 | 247 | |
b5c334cc | 248 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 249 | return -1; |
51e7a012 | 250 | val = get_u32(handle); |
b5e300c2 | 251 | if (handle_is_ok(val, HANDLE_FILE) || |
252 | handle_is_ok(val, HANDLE_DIR)) | |
253 | return val; | |
254 | return -1; | |
255 | } | |
256 | ||
396c147e | 257 | static char * |
b5e300c2 | 258 | handle_to_name(int handle) |
259 | { | |
260 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
261 | handle_is_ok(handle, HANDLE_FILE)) | |
262 | return handles[handle].name; | |
263 | return NULL; | |
264 | } | |
265 | ||
396c147e | 266 | static DIR * |
b5e300c2 | 267 | handle_to_dir(int handle) |
268 | { | |
269 | if (handle_is_ok(handle, HANDLE_DIR)) | |
270 | return handles[handle].dirp; | |
271 | return NULL; | |
272 | } | |
273 | ||
396c147e | 274 | static int |
b5e300c2 | 275 | handle_to_fd(int handle) |
276 | { | |
2b87da3b | 277 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 278 | return handles[handle].fd; |
279 | return -1; | |
280 | } | |
281 | ||
a13880bb | 282 | static void |
283 | handle_update_read(int handle, ssize_t bytes) | |
284 | { | |
285 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
286 | handles[handle].bytes_read += bytes; | |
287 | } | |
288 | ||
289 | static void | |
290 | handle_update_write(int handle, ssize_t bytes) | |
291 | { | |
292 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
293 | handles[handle].bytes_write += bytes; | |
294 | } | |
295 | ||
296 | static u_int64_t | |
297 | handle_bytes_read(int handle) | |
298 | { | |
299 | if (handle_is_ok(handle, HANDLE_FILE)) | |
300 | return (handles[handle].bytes_read); | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static u_int64_t | |
305 | handle_bytes_write(int handle) | |
306 | { | |
307 | if (handle_is_ok(handle, HANDLE_FILE)) | |
308 | return (handles[handle].bytes_write); | |
309 | return 0; | |
310 | } | |
311 | ||
396c147e | 312 | static int |
b5e300c2 | 313 | handle_close(int handle) |
314 | { | |
315 | int ret = -1; | |
dce9bac5 | 316 | |
b5e300c2 | 317 | if (handle_is_ok(handle, HANDLE_FILE)) { |
318 | ret = close(handles[handle].fd); | |
3e2f2431 | 319 | xfree(handles[handle].name); |
b4bbe43c | 320 | handle_unused(handle); |
b5e300c2 | 321 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
322 | ret = closedir(handles[handle].dirp); | |
3e2f2431 | 323 | xfree(handles[handle].name); |
b4bbe43c | 324 | handle_unused(handle); |
b5e300c2 | 325 | } else { |
326 | errno = ENOENT; | |
327 | } | |
328 | return ret; | |
329 | } | |
330 | ||
a13880bb | 331 | static void |
332 | handle_log_close(int handle, char *emsg) | |
333 | { | |
334 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
335 | logit("%s%sclose \"%s\" bytes read %llu written %llu", | |
336 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
337 | handle_to_name(handle), | |
23983bf9 | 338 | (unsigned long long)handle_bytes_read(handle), |
339 | (unsigned long long)handle_bytes_write(handle)); | |
a13880bb | 340 | } else { |
341 | logit("%s%sclosedir \"%s\"", | |
342 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
343 | handle_to_name(handle)); | |
344 | } | |
345 | } | |
346 | ||
347 | static void | |
348 | handle_log_exit(void) | |
349 | { | |
350 | u_int i; | |
351 | ||
b4bbe43c | 352 | for (i = 0; i < num_handles; i++) |
a13880bb | 353 | if (handles[i].use != HANDLE_UNUSED) |
354 | handle_log_close(i, "forced"); | |
355 | } | |
356 | ||
396c147e | 357 | static int |
b5e300c2 | 358 | get_handle(void) |
359 | { | |
360 | char *handle; | |
f546c780 | 361 | int val = -1; |
bcbf86ec | 362 | u_int hlen; |
dce9bac5 | 363 | |
b5e300c2 | 364 | handle = get_string(&hlen); |
f546c780 | 365 | if (hlen < 256) |
366 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 367 | xfree(handle); |
368 | return val; | |
369 | } | |
370 | ||
371 | /* send replies */ | |
372 | ||
396c147e | 373 | static void |
b5e300c2 | 374 | send_msg(Buffer *m) |
375 | { | |
376 | int mlen = buffer_len(m); | |
dce9bac5 | 377 | |
b5e300c2 | 378 | buffer_put_int(&oqueue, mlen); |
379 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
380 | buffer_consume(m, mlen); | |
381 | } | |
382 | ||
a13880bb | 383 | static const char * |
384 | status_to_message(u_int32_t status) | |
b5e300c2 | 385 | { |
3a7fe5ba | 386 | const char *status_messages[] = { |
387 | "Success", /* SSH_FX_OK */ | |
388 | "End of file", /* SSH_FX_EOF */ | |
389 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
390 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
391 | "Failure", /* SSH_FX_FAILURE */ | |
392 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
393 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
394 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
395 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
396 | "Unknown error" /* Others */ | |
397 | }; | |
a13880bb | 398 | return (status_messages[MIN(status,SSH2_FX_MAX)]); |
399 | } | |
dce9bac5 | 400 | |
a13880bb | 401 | static void |
402 | send_status(u_int32_t id, u_int32_t status) | |
403 | { | |
404 | Buffer msg; | |
405 | ||
406 | debug3("request %u: sent status %u", id, status); | |
407 | if (log_level > SYSLOG_LEVEL_VERBOSE || | |
408 | (status != SSH2_FX_OK && status != SSH2_FX_EOF)) | |
409 | logit("sent status %s", status_to_message(status)); | |
b5e300c2 | 410 | buffer_init(&msg); |
f546c780 | 411 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 412 | buffer_put_int(&msg, id); |
ca75d7de | 413 | buffer_put_int(&msg, status); |
3a7fe5ba | 414 | if (version >= 3) { |
a13880bb | 415 | buffer_put_cstring(&msg, status_to_message(status)); |
3a7fe5ba | 416 | buffer_put_cstring(&msg, ""); |
417 | } | |
b5e300c2 | 418 | send_msg(&msg); |
419 | buffer_free(&msg); | |
420 | } | |
396c147e | 421 | static void |
b6c7b7b7 | 422 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 423 | { |
424 | Buffer msg; | |
dce9bac5 | 425 | |
b5e300c2 | 426 | buffer_init(&msg); |
427 | buffer_put_char(&msg, type); | |
428 | buffer_put_int(&msg, id); | |
429 | buffer_put_string(&msg, data, dlen); | |
430 | send_msg(&msg); | |
431 | buffer_free(&msg); | |
432 | } | |
433 | ||
396c147e | 434 | static void |
b6c7b7b7 | 435 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 436 | { |
a13880bb | 437 | debug("request %u: sent data len %d", id, dlen); |
f546c780 | 438 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 439 | } |
440 | ||
396c147e | 441 | static void |
b5e300c2 | 442 | send_handle(u_int32_t id, int handle) |
443 | { | |
444 | char *string; | |
445 | int hlen; | |
dce9bac5 | 446 | |
b5e300c2 | 447 | handle_to_string(handle, &string, &hlen); |
a13880bb | 448 | debug("request %u: sent handle handle %d", id, handle); |
f546c780 | 449 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 450 | xfree(string); |
451 | } | |
452 | ||
396c147e | 453 | static void |
b6c7b7b7 | 454 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 455 | { |
456 | Buffer msg; | |
457 | int i; | |
dce9bac5 | 458 | |
b5e300c2 | 459 | buffer_init(&msg); |
f546c780 | 460 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 461 | buffer_put_int(&msg, id); |
462 | buffer_put_int(&msg, count); | |
a13880bb | 463 | debug("request %u: sent names count %d", id, count); |
b5e300c2 | 464 | for (i = 0; i < count; i++) { |
465 | buffer_put_cstring(&msg, stats[i].name); | |
466 | buffer_put_cstring(&msg, stats[i].long_name); | |
467 | encode_attrib(&msg, &stats[i].attrib); | |
468 | } | |
469 | send_msg(&msg); | |
470 | buffer_free(&msg); | |
471 | } | |
472 | ||
396c147e | 473 | static void |
b6c7b7b7 | 474 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 475 | { |
476 | Buffer msg; | |
dce9bac5 | 477 | |
a13880bb | 478 | debug("request %u: sent attrib have 0x%x", id, a->flags); |
b5e300c2 | 479 | buffer_init(&msg); |
f546c780 | 480 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 481 | buffer_put_int(&msg, id); |
482 | encode_attrib(&msg, a); | |
483 | send_msg(&msg); | |
484 | buffer_free(&msg); | |
485 | } | |
486 | ||
360b43ab | 487 | static void |
488 | send_statvfs(u_int32_t id, struct statvfs *st) | |
489 | { | |
490 | Buffer msg; | |
491 | u_int64_t flag; | |
492 | ||
493 | flag = (st->f_flag & ST_RDONLY) ? SSH2_FXE_STATVFS_ST_RDONLY : 0; | |
494 | flag |= (st->f_flag & ST_NOSUID) ? SSH2_FXE_STATVFS_ST_NOSUID : 0; | |
495 | ||
496 | buffer_init(&msg); | |
497 | buffer_put_char(&msg, SSH2_FXP_EXTENDED_REPLY); | |
498 | buffer_put_int(&msg, id); | |
7290afcb | 499 | buffer_put_int64(&msg, st->f_bsize); |
500 | buffer_put_int64(&msg, st->f_frsize); | |
360b43ab | 501 | buffer_put_int64(&msg, st->f_blocks); |
502 | buffer_put_int64(&msg, st->f_bfree); | |
503 | buffer_put_int64(&msg, st->f_bavail); | |
504 | buffer_put_int64(&msg, st->f_files); | |
505 | buffer_put_int64(&msg, st->f_ffree); | |
506 | buffer_put_int64(&msg, st->f_favail); | |
7a4f468b | 507 | buffer_put_int64(&msg, FSID_TO_ULONG(st->f_fsid)); |
7290afcb | 508 | buffer_put_int64(&msg, flag); |
509 | buffer_put_int64(&msg, st->f_namemax); | |
360b43ab | 510 | send_msg(&msg); |
511 | buffer_free(&msg); | |
512 | } | |
513 | ||
b5e300c2 | 514 | /* parse incoming */ |
515 | ||
396c147e | 516 | static void |
b5e300c2 | 517 | process_init(void) |
518 | { | |
519 | Buffer msg; | |
b5e300c2 | 520 | |
802d93bb | 521 | version = get_int(); |
a13880bb | 522 | verbose("received client version %d", version); |
b5e300c2 | 523 | buffer_init(&msg); |
f546c780 | 524 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
525 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
9fcc4e18 | 526 | /* POSIX rename extension */ |
527 | buffer_put_cstring(&msg, "posix-rename@openssh.com"); | |
528 | buffer_put_cstring(&msg, "1"); /* version */ | |
f8db3345 | 529 | /* statvfs extension */ |
360b43ab | 530 | buffer_put_cstring(&msg, "statvfs@openssh.com"); |
4f36159a | 531 | buffer_put_cstring(&msg, "2"); /* version */ |
f8db3345 | 532 | /* fstatvfs extension */ |
360b43ab | 533 | buffer_put_cstring(&msg, "fstatvfs@openssh.com"); |
4f36159a | 534 | buffer_put_cstring(&msg, "2"); /* version */ |
b5e300c2 | 535 | send_msg(&msg); |
536 | buffer_free(&msg); | |
537 | } | |
538 | ||
396c147e | 539 | static void |
b5e300c2 | 540 | process_open(void) |
541 | { | |
542 | u_int32_t id, pflags; | |
543 | Attrib *a; | |
544 | char *name; | |
f546c780 | 545 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 546 | |
547 | id = get_int(); | |
548 | name = get_string(NULL); | |
f546c780 | 549 | pflags = get_int(); /* portable flags */ |
26ddd377 | 550 | debug3("request %u: open flags %d", id, pflags); |
b5e300c2 | 551 | a = get_attrib(); |
552 | flags = flags_from_portable(pflags); | |
f546c780 | 553 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
a13880bb | 554 | logit("open \"%s\" flags %s mode 0%o", |
555 | name, string_from_portable(pflags), mode); | |
b5e300c2 | 556 | fd = open(name, flags, mode); |
557 | if (fd < 0) { | |
558 | status = errno_to_portable(errno); | |
559 | } else { | |
3e2f2431 | 560 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
b5e300c2 | 561 | if (handle < 0) { |
562 | close(fd); | |
563 | } else { | |
564 | send_handle(id, handle); | |
f546c780 | 565 | status = SSH2_FX_OK; |
b5e300c2 | 566 | } |
567 | } | |
f546c780 | 568 | if (status != SSH2_FX_OK) |
b5e300c2 | 569 | send_status(id, status); |
570 | xfree(name); | |
571 | } | |
572 | ||
396c147e | 573 | static void |
b5e300c2 | 574 | process_close(void) |
575 | { | |
576 | u_int32_t id; | |
f546c780 | 577 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 578 | |
579 | id = get_int(); | |
580 | handle = get_handle(); | |
a13880bb | 581 | debug3("request %u: close handle %u", id, handle); |
582 | handle_log_close(handle, NULL); | |
b5e300c2 | 583 | ret = handle_close(handle); |
f546c780 | 584 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 585 | send_status(id, status); |
586 | } | |
587 | ||
396c147e | 588 | static void |
b5e300c2 | 589 | process_read(void) |
590 | { | |
591 | char buf[64*1024]; | |
f546c780 | 592 | u_int32_t id, len; |
593 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 594 | u_int64_t off; |
595 | ||
596 | id = get_int(); | |
597 | handle = get_handle(); | |
f546c780 | 598 | off = get_int64(); |
b5e300c2 | 599 | len = get_int(); |
600 | ||
a13880bb | 601 | debug("request %u: read \"%s\" (handle %d) off %llu len %d", |
602 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 603 | if (len > sizeof buf) { |
604 | len = sizeof buf; | |
a13880bb | 605 | debug2("read change len %d", len); |
b5e300c2 | 606 | } |
607 | fd = handle_to_fd(handle); | |
608 | if (fd >= 0) { | |
609 | if (lseek(fd, off, SEEK_SET) < 0) { | |
610 | error("process_read: seek failed"); | |
611 | status = errno_to_portable(errno); | |
612 | } else { | |
613 | ret = read(fd, buf, len); | |
614 | if (ret < 0) { | |
615 | status = errno_to_portable(errno); | |
616 | } else if (ret == 0) { | |
f546c780 | 617 | status = SSH2_FX_EOF; |
b5e300c2 | 618 | } else { |
619 | send_data(id, buf, ret); | |
f546c780 | 620 | status = SSH2_FX_OK; |
a13880bb | 621 | handle_update_read(handle, ret); |
b5e300c2 | 622 | } |
623 | } | |
624 | } | |
f546c780 | 625 | if (status != SSH2_FX_OK) |
b5e300c2 | 626 | send_status(id, status); |
627 | } | |
628 | ||
396c147e | 629 | static void |
b5e300c2 | 630 | process_write(void) |
631 | { | |
f546c780 | 632 | u_int32_t id; |
b5e300c2 | 633 | u_int64_t off; |
bcbf86ec | 634 | u_int len; |
f546c780 | 635 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 636 | char *data; |
637 | ||
638 | id = get_int(); | |
639 | handle = get_handle(); | |
f546c780 | 640 | off = get_int64(); |
b5e300c2 | 641 | data = get_string(&len); |
642 | ||
a13880bb | 643 | debug("request %u: write \"%s\" (handle %d) off %llu len %d", |
644 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 645 | fd = handle_to_fd(handle); |
646 | if (fd >= 0) { | |
647 | if (lseek(fd, off, SEEK_SET) < 0) { | |
648 | status = errno_to_portable(errno); | |
649 | error("process_write: seek failed"); | |
650 | } else { | |
651 | /* XXX ATOMICIO ? */ | |
652 | ret = write(fd, data, len); | |
2ceb8101 | 653 | if (ret < 0) { |
b5e300c2 | 654 | error("process_write: write failed"); |
655 | status = errno_to_portable(errno); | |
2ceb8101 | 656 | } else if ((size_t)ret == len) { |
f546c780 | 657 | status = SSH2_FX_OK; |
a13880bb | 658 | handle_update_write(handle, ret); |
b5e300c2 | 659 | } else { |
a13880bb | 660 | debug2("nothing at all written"); |
b5e300c2 | 661 | } |
662 | } | |
663 | } | |
664 | send_status(id, status); | |
665 | xfree(data); | |
666 | } | |
667 | ||
396c147e | 668 | static void |
b5e300c2 | 669 | process_do_stat(int do_lstat) |
670 | { | |
b5c334cc | 671 | Attrib a; |
b5e300c2 | 672 | struct stat st; |
673 | u_int32_t id; | |
674 | char *name; | |
f546c780 | 675 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 676 | |
677 | id = get_int(); | |
678 | name = get_string(NULL); | |
a13880bb | 679 | debug3("request %u: %sstat", id, do_lstat ? "l" : ""); |
680 | verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); | |
b5e300c2 | 681 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
682 | if (ret < 0) { | |
683 | status = errno_to_portable(errno); | |
684 | } else { | |
b5c334cc | 685 | stat_to_attrib(&st, &a); |
686 | send_attrib(id, &a); | |
f546c780 | 687 | status = SSH2_FX_OK; |
b5e300c2 | 688 | } |
f546c780 | 689 | if (status != SSH2_FX_OK) |
b5e300c2 | 690 | send_status(id, status); |
691 | xfree(name); | |
692 | } | |
693 | ||
396c147e | 694 | static void |
b5e300c2 | 695 | process_stat(void) |
696 | { | |
697 | process_do_stat(0); | |
698 | } | |
699 | ||
396c147e | 700 | static void |
b5e300c2 | 701 | process_lstat(void) |
702 | { | |
703 | process_do_stat(1); | |
704 | } | |
705 | ||
396c147e | 706 | static void |
b5e300c2 | 707 | process_fstat(void) |
708 | { | |
b5c334cc | 709 | Attrib a; |
b5e300c2 | 710 | struct stat st; |
711 | u_int32_t id; | |
f546c780 | 712 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 713 | |
714 | id = get_int(); | |
715 | handle = get_handle(); | |
a13880bb | 716 | debug("request %u: fstat \"%s\" (handle %u)", |
717 | id, handle_to_name(handle), handle); | |
b5e300c2 | 718 | fd = handle_to_fd(handle); |
9a24ac07 | 719 | if (fd >= 0) { |
b5e300c2 | 720 | ret = fstat(fd, &st); |
721 | if (ret < 0) { | |
722 | status = errno_to_portable(errno); | |
723 | } else { | |
b5c334cc | 724 | stat_to_attrib(&st, &a); |
725 | send_attrib(id, &a); | |
f546c780 | 726 | status = SSH2_FX_OK; |
b5e300c2 | 727 | } |
728 | } | |
f546c780 | 729 | if (status != SSH2_FX_OK) |
b5e300c2 | 730 | send_status(id, status); |
731 | } | |
732 | ||
396c147e | 733 | static struct timeval * |
b6c7b7b7 | 734 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 735 | { |
736 | static struct timeval tv[2]; | |
dce9bac5 | 737 | |
b5e300c2 | 738 | tv[0].tv_sec = a->atime; |
739 | tv[0].tv_usec = 0; | |
740 | tv[1].tv_sec = a->mtime; | |
741 | tv[1].tv_usec = 0; | |
742 | return tv; | |
743 | } | |
744 | ||
396c147e | 745 | static void |
b5e300c2 | 746 | process_setstat(void) |
747 | { | |
748 | Attrib *a; | |
749 | u_int32_t id; | |
750 | char *name; | |
9906a836 | 751 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 752 | |
753 | id = get_int(); | |
754 | name = get_string(NULL); | |
755 | a = get_attrib(); | |
a13880bb | 756 | debug("request %u: setstat name \"%s\"", id, name); |
cb476289 | 757 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
23983bf9 | 758 | logit("set \"%s\" size %llu", |
759 | name, (unsigned long long)a->size); | |
cb476289 | 760 | ret = truncate(name, a->size); |
761 | if (ret == -1) | |
762 | status = errno_to_portable(errno); | |
763 | } | |
f546c780 | 764 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 765 | logit("set \"%s\" mode %04o", name, a->perm); |
681efe9f | 766 | ret = chmod(name, a->perm & 07777); |
b5e300c2 | 767 | if (ret == -1) |
768 | status = errno_to_portable(errno); | |
769 | } | |
f546c780 | 770 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 771 | char buf[64]; |
772 | time_t t = a->mtime; | |
773 | ||
774 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
775 | localtime(&t)); | |
776 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 777 | ret = utimes(name, attrib_to_tv(a)); |
778 | if (ret == -1) | |
779 | status = errno_to_portable(errno); | |
780 | } | |
408ba72f | 781 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 782 | logit("set \"%s\" owner %lu group %lu", name, |
783 | (u_long)a->uid, (u_long)a->gid); | |
408ba72f | 784 | ret = chown(name, a->uid, a->gid); |
785 | if (ret == -1) | |
786 | status = errno_to_portable(errno); | |
787 | } | |
b5e300c2 | 788 | send_status(id, status); |
789 | xfree(name); | |
790 | } | |
791 | ||
396c147e | 792 | static void |
b5e300c2 | 793 | process_fsetstat(void) |
794 | { | |
795 | Attrib *a; | |
796 | u_int32_t id; | |
797 | int handle, fd, ret; | |
f546c780 | 798 | int status = SSH2_FX_OK; |
16e538d4 | 799 | |
b5e300c2 | 800 | id = get_int(); |
801 | handle = get_handle(); | |
802 | a = get_attrib(); | |
a13880bb | 803 | debug("request %u: fsetstat handle %d", id, handle); |
b5e300c2 | 804 | fd = handle_to_fd(handle); |
a13880bb | 805 | if (fd < 0) { |
f546c780 | 806 | status = SSH2_FX_FAILURE; |
b5e300c2 | 807 | } else { |
a13880bb | 808 | char *name = handle_to_name(handle); |
809 | ||
cb476289 | 810 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
23983bf9 | 811 | logit("set \"%s\" size %llu", |
812 | name, (unsigned long long)a->size); | |
cb476289 | 813 | ret = ftruncate(fd, a->size); |
814 | if (ret == -1) | |
815 | status = errno_to_portable(errno); | |
816 | } | |
f546c780 | 817 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 818 | logit("set \"%s\" mode %04o", name, a->perm); |
2fd3c144 | 819 | #ifdef HAVE_FCHMOD |
681efe9f | 820 | ret = fchmod(fd, a->perm & 07777); |
2fd3c144 | 821 | #else |
681efe9f | 822 | ret = chmod(name, a->perm & 07777); |
2fd3c144 | 823 | #endif |
b5e300c2 | 824 | if (ret == -1) |
825 | status = errno_to_portable(errno); | |
826 | } | |
f546c780 | 827 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 828 | char buf[64]; |
829 | time_t t = a->mtime; | |
830 | ||
831 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
832 | localtime(&t)); | |
833 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 834 | #ifdef HAVE_FUTIMES |
835 | ret = futimes(fd, attrib_to_tv(a)); | |
836 | #else | |
837 | ret = utimes(name, attrib_to_tv(a)); | |
838 | #endif | |
839 | if (ret == -1) | |
840 | status = errno_to_portable(errno); | |
841 | } | |
408ba72f | 842 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 843 | logit("set \"%s\" owner %lu group %lu", name, |
844 | (u_long)a->uid, (u_long)a->gid); | |
01f13020 | 845 | #ifdef HAVE_FCHOWN |
408ba72f | 846 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 847 | #else |
848 | ret = chown(name, a->uid, a->gid); | |
849 | #endif | |
408ba72f | 850 | if (ret == -1) |
851 | status = errno_to_portable(errno); | |
852 | } | |
b5e300c2 | 853 | } |
854 | send_status(id, status); | |
855 | } | |
856 | ||
396c147e | 857 | static void |
b5e300c2 | 858 | process_opendir(void) |
859 | { | |
860 | DIR *dirp = NULL; | |
861 | char *path; | |
f546c780 | 862 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 863 | u_int32_t id; |
864 | ||
865 | id = get_int(); | |
866 | path = get_string(NULL); | |
a13880bb | 867 | debug3("request %u: opendir", id); |
868 | logit("opendir \"%s\"", path); | |
2b87da3b | 869 | dirp = opendir(path); |
b5e300c2 | 870 | if (dirp == NULL) { |
871 | status = errno_to_portable(errno); | |
872 | } else { | |
3e2f2431 | 873 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 874 | if (handle < 0) { |
875 | closedir(dirp); | |
876 | } else { | |
877 | send_handle(id, handle); | |
f546c780 | 878 | status = SSH2_FX_OK; |
b5e300c2 | 879 | } |
2b87da3b | 880 | |
b5e300c2 | 881 | } |
f546c780 | 882 | if (status != SSH2_FX_OK) |
b5e300c2 | 883 | send_status(id, status); |
884 | xfree(path); | |
885 | } | |
886 | ||
396c147e | 887 | static void |
b5e300c2 | 888 | process_readdir(void) |
889 | { | |
890 | DIR *dirp; | |
891 | struct dirent *dp; | |
892 | char *path; | |
893 | int handle; | |
894 | u_int32_t id; | |
895 | ||
896 | id = get_int(); | |
897 | handle = get_handle(); | |
a13880bb | 898 | debug("request %u: readdir \"%s\" (handle %d)", id, |
899 | handle_to_name(handle), handle); | |
b5e300c2 | 900 | dirp = handle_to_dir(handle); |
901 | path = handle_to_name(handle); | |
902 | if (dirp == NULL || path == NULL) { | |
f546c780 | 903 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 904 | } else { |
b5e300c2 | 905 | struct stat st; |
a13880bb | 906 | char pathname[MAXPATHLEN]; |
b5e300c2 | 907 | Stat *stats; |
908 | int nstats = 10, count = 0, i; | |
9906a836 | 909 | |
52e3daed | 910 | stats = xcalloc(nstats, sizeof(Stat)); |
b5e300c2 | 911 | while ((dp = readdir(dirp)) != NULL) { |
912 | if (count >= nstats) { | |
913 | nstats *= 2; | |
c5d10563 | 914 | stats = xrealloc(stats, nstats, sizeof(Stat)); |
b5e300c2 | 915 | } |
916 | /* XXX OVERFLOW ? */ | |
88690211 | 917 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
918 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 919 | if (lstat(pathname, &st) < 0) |
920 | continue; | |
b5c334cc | 921 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 922 | stats[count].name = xstrdup(dp->d_name); |
00b3ad3e | 923 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
b5e300c2 | 924 | count++; |
925 | /* send up to 100 entries in one message */ | |
b5c334cc | 926 | /* XXX check packet size instead */ |
b5e300c2 | 927 | if (count == 100) |
928 | break; | |
929 | } | |
f546c780 | 930 | if (count > 0) { |
931 | send_names(id, count, stats); | |
184eed6a | 932 | for (i = 0; i < count; i++) { |
f546c780 | 933 | xfree(stats[i].name); |
934 | xfree(stats[i].long_name); | |
935 | } | |
936 | } else { | |
937 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 938 | } |
939 | xfree(stats); | |
940 | } | |
941 | } | |
942 | ||
396c147e | 943 | static void |
b5e300c2 | 944 | process_remove(void) |
945 | { | |
946 | char *name; | |
947 | u_int32_t id; | |
f546c780 | 948 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 949 | int ret; |
950 | ||
951 | id = get_int(); | |
952 | name = get_string(NULL); | |
a13880bb | 953 | debug3("request %u: remove", id); |
954 | logit("remove name \"%s\"", name); | |
67b0facb | 955 | ret = unlink(name); |
f546c780 | 956 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 957 | send_status(id, status); |
958 | xfree(name); | |
959 | } | |
960 | ||
396c147e | 961 | static void |
b5e300c2 | 962 | process_mkdir(void) |
963 | { | |
964 | Attrib *a; | |
965 | u_int32_t id; | |
966 | char *name; | |
f546c780 | 967 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 968 | |
969 | id = get_int(); | |
970 | name = get_string(NULL); | |
971 | a = get_attrib(); | |
f546c780 | 972 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
681efe9f | 973 | a->perm & 07777 : 0777; |
a13880bb | 974 | debug3("request %u: mkdir", id); |
975 | logit("mkdir name \"%s\" mode 0%o", name, mode); | |
b5e300c2 | 976 | ret = mkdir(name, mode); |
f546c780 | 977 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 978 | send_status(id, status); |
979 | xfree(name); | |
980 | } | |
981 | ||
396c147e | 982 | static void |
b5e300c2 | 983 | process_rmdir(void) |
984 | { | |
985 | u_int32_t id; | |
986 | char *name; | |
987 | int ret, status; | |
988 | ||
989 | id = get_int(); | |
990 | name = get_string(NULL); | |
a13880bb | 991 | debug3("request %u: rmdir", id); |
992 | logit("rmdir name \"%s\"", name); | |
b5e300c2 | 993 | ret = rmdir(name); |
f546c780 | 994 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 995 | send_status(id, status); |
996 | xfree(name); | |
997 | } | |
998 | ||
396c147e | 999 | static void |
b5e300c2 | 1000 | process_realpath(void) |
1001 | { | |
1002 | char resolvedname[MAXPATHLEN]; | |
1003 | u_int32_t id; | |
1004 | char *path; | |
1005 | ||
1006 | id = get_int(); | |
1007 | path = get_string(NULL); | |
6b523bae | 1008 | if (path[0] == '\0') { |
1009 | xfree(path); | |
1010 | path = xstrdup("."); | |
1011 | } | |
a13880bb | 1012 | debug3("request %u: realpath", id); |
1013 | verbose("realpath \"%s\"", path); | |
b5e300c2 | 1014 | if (realpath(path, resolvedname) == NULL) { |
1015 | send_status(id, errno_to_portable(errno)); | |
1016 | } else { | |
1017 | Stat s; | |
1018 | attrib_clear(&s.attrib); | |
1019 | s.name = s.long_name = resolvedname; | |
1020 | send_names(id, 1, &s); | |
1021 | } | |
1022 | xfree(path); | |
1023 | } | |
1024 | ||
396c147e | 1025 | static void |
b5e300c2 | 1026 | process_rename(void) |
1027 | { | |
1028 | u_int32_t id; | |
1029 | char *oldpath, *newpath; | |
f2f28f1f | 1030 | int status; |
fd77a40f | 1031 | struct stat sb; |
b5e300c2 | 1032 | |
1033 | id = get_int(); | |
1034 | oldpath = get_string(NULL); | |
1035 | newpath = get_string(NULL); | |
a13880bb | 1036 | debug3("request %u: rename", id); |
1037 | logit("rename old \"%s\" new \"%s\"", oldpath, newpath); | |
fd77a40f | 1038 | status = SSH2_FX_FAILURE; |
1039 | if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 1040 | status = errno_to_portable(errno); |
fd77a40f | 1041 | else if (S_ISREG(sb.st_mode)) { |
1042 | /* Race-free rename of regular files */ | |
dc5888bf | 1043 | if (link(oldpath, newpath) == -1) { |
6ecb350f | 1044 | if (errno == EOPNOTSUPP || errno == ENOSYS |
97e61398 | 1045 | #ifdef EXDEV |
1046 | || errno == EXDEV | |
1047 | #endif | |
cd698186 | 1048 | #ifdef LINK_OPNOTSUPP_ERRNO |
1049 | || errno == LINK_OPNOTSUPP_ERRNO | |
1050 | #endif | |
1051 | ) { | |
dc5888bf | 1052 | struct stat st; |
1053 | ||
1054 | /* | |
1055 | * fs doesn't support links, so fall back to | |
1056 | * stat+rename. This is racy. | |
1057 | */ | |
1058 | if (stat(newpath, &st) == -1) { | |
1059 | if (rename(oldpath, newpath) == -1) | |
1060 | status = | |
1061 | errno_to_portable(errno); | |
1062 | else | |
1063 | status = SSH2_FX_OK; | |
1064 | } | |
1065 | } else { | |
1066 | status = errno_to_portable(errno); | |
1067 | } | |
1068 | } else if (unlink(oldpath) == -1) { | |
fd77a40f | 1069 | status = errno_to_portable(errno); |
1070 | /* clean spare link */ | |
1071 | unlink(newpath); | |
1072 | } else | |
1073 | status = SSH2_FX_OK; | |
1074 | } else if (stat(newpath, &sb) == -1) { | |
1075 | if (rename(oldpath, newpath) == -1) | |
1076 | status = errno_to_portable(errno); | |
1077 | else | |
1078 | status = SSH2_FX_OK; | |
1079 | } | |
b5e300c2 | 1080 | send_status(id, status); |
1081 | xfree(oldpath); | |
1082 | xfree(newpath); | |
1083 | } | |
1084 | ||
396c147e | 1085 | static void |
3a7fe5ba | 1086 | process_readlink(void) |
1087 | { | |
1088 | u_int32_t id; | |
362df52e | 1089 | int len; |
ca75d7de | 1090 | char buf[MAXPATHLEN]; |
3a7fe5ba | 1091 | char *path; |
1092 | ||
1093 | id = get_int(); | |
1094 | path = get_string(NULL); | |
a13880bb | 1095 | debug3("request %u: readlink", id); |
1096 | verbose("readlink \"%s\"", path); | |
ca75d7de | 1097 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3a7fe5ba | 1098 | send_status(id, errno_to_portable(errno)); |
1099 | else { | |
1100 | Stat s; | |
184eed6a | 1101 | |
ca75d7de | 1102 | buf[len] = '\0'; |
3a7fe5ba | 1103 | attrib_clear(&s.attrib); |
ca75d7de | 1104 | s.name = s.long_name = buf; |
3a7fe5ba | 1105 | send_names(id, 1, &s); |
1106 | } | |
1107 | xfree(path); | |
1108 | } | |
1109 | ||
396c147e | 1110 | static void |
3a7fe5ba | 1111 | process_symlink(void) |
1112 | { | |
1113 | u_int32_t id; | |
3a7fe5ba | 1114 | char *oldpath, *newpath; |
f2f28f1f | 1115 | int ret, status; |
3a7fe5ba | 1116 | |
1117 | id = get_int(); | |
1118 | oldpath = get_string(NULL); | |
1119 | newpath = get_string(NULL); | |
a13880bb | 1120 | debug3("request %u: symlink", id); |
1121 | logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); | |
f2f28f1f | 1122 | /* this will fail if 'newpath' exists */ |
1123 | ret = symlink(oldpath, newpath); | |
1124 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3a7fe5ba | 1125 | send_status(id, status); |
1126 | xfree(oldpath); | |
1127 | xfree(newpath); | |
1128 | } | |
1129 | ||
9fcc4e18 | 1130 | static void |
1131 | process_extended_posix_rename(u_int32_t id) | |
1132 | { | |
1133 | char *oldpath, *newpath; | |
1134 | ||
1135 | oldpath = get_string(NULL); | |
1136 | newpath = get_string(NULL); | |
1137 | debug3("request %u: posix-rename", id); | |
1138 | logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath); | |
1139 | if (rename(oldpath, newpath) == -1) | |
1140 | send_status(id, errno_to_portable(errno)); | |
1141 | else | |
1142 | send_status(id, SSH2_FX_OK); | |
1143 | xfree(oldpath); | |
1144 | xfree(newpath); | |
1145 | } | |
1146 | ||
360b43ab | 1147 | static void |
1148 | process_extended_statvfs(u_int32_t id) | |
1149 | { | |
1150 | char *path; | |
1151 | struct statvfs st; | |
1152 | ||
1153 | path = get_string(NULL); | |
1154 | debug3("request %u: statfs", id); | |
1155 | logit("statfs \"%s\"", path); | |
1156 | ||
1157 | if (statvfs(path, &st) != 0) | |
1158 | send_status(id, errno_to_portable(errno)); | |
1159 | else | |
1160 | send_statvfs(id, &st); | |
1161 | xfree(path); | |
1162 | } | |
1163 | ||
1164 | static void | |
1165 | process_extended_fstatvfs(u_int32_t id) | |
1166 | { | |
1167 | int handle, fd; | |
1168 | struct statvfs st; | |
1169 | ||
1170 | handle = get_handle(); | |
1171 | debug("request %u: fstatvfs \"%s\" (handle %u)", | |
1172 | id, handle_to_name(handle), handle); | |
1173 | if ((fd = handle_to_fd(handle)) < 0) { | |
1174 | send_status(id, SSH2_FX_FAILURE); | |
1175 | return; | |
1176 | } | |
1177 | if (fstatvfs(fd, &st) != 0) | |
1178 | send_status(id, errno_to_portable(errno)); | |
1179 | else | |
1180 | send_statvfs(id, &st); | |
1181 | } | |
1182 | ||
396c147e | 1183 | static void |
f546c780 | 1184 | process_extended(void) |
1185 | { | |
1186 | u_int32_t id; | |
1187 | char *request; | |
1188 | ||
1189 | id = get_int(); | |
1190 | request = get_string(NULL); | |
9fcc4e18 | 1191 | if (strcmp(request, "posix-rename@openssh.com") == 0) |
1192 | process_extended_posix_rename(id); | |
360b43ab | 1193 | else if (strcmp(request, "statvfs@openssh.com") == 0) |
1194 | process_extended_statvfs(id); | |
1195 | else if (strcmp(request, "fstatvfs@openssh.com") == 0) | |
1196 | process_extended_fstatvfs(id); | |
9fcc4e18 | 1197 | else |
1198 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
f546c780 | 1199 | xfree(request); |
1200 | } | |
b5e300c2 | 1201 | |
1202 | /* stolen from ssh-agent */ | |
1203 | ||
396c147e | 1204 | static void |
b5e300c2 | 1205 | process(void) |
1206 | { | |
1e3b8b07 | 1207 | u_int msg_len; |
9b4ac641 | 1208 | u_int buf_len; |
1209 | u_int consumed; | |
1e3b8b07 | 1210 | u_int type; |
1211 | u_char *cp; | |
b5e300c2 | 1212 | |
9b4ac641 | 1213 | buf_len = buffer_len(&iqueue); |
1214 | if (buf_len < 5) | |
b5e300c2 | 1215 | return; /* Incomplete message. */ |
20905a8e | 1216 | cp = buffer_ptr(&iqueue); |
51e7a012 | 1217 | msg_len = get_u32(cp); |
3eee3b86 | 1218 | if (msg_len > SFTP_MAX_MSG_LENGTH) { |
a13880bb | 1219 | error("bad message from %s local user %s", |
1220 | client_addr, pw->pw_name); | |
c33ba17e | 1221 | sftp_server_cleanup_exit(11); |
b5e300c2 | 1222 | } |
9b4ac641 | 1223 | if (buf_len < msg_len + 4) |
b5e300c2 | 1224 | return; |
1225 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 1226 | buf_len -= 4; |
b5e300c2 | 1227 | type = buffer_get_char(&iqueue); |
1228 | switch (type) { | |
f546c780 | 1229 | case SSH2_FXP_INIT: |
b5e300c2 | 1230 | process_init(); |
1231 | break; | |
f546c780 | 1232 | case SSH2_FXP_OPEN: |
b5e300c2 | 1233 | process_open(); |
1234 | break; | |
f546c780 | 1235 | case SSH2_FXP_CLOSE: |
b5e300c2 | 1236 | process_close(); |
1237 | break; | |
f546c780 | 1238 | case SSH2_FXP_READ: |
b5e300c2 | 1239 | process_read(); |
1240 | break; | |
f546c780 | 1241 | case SSH2_FXP_WRITE: |
b5e300c2 | 1242 | process_write(); |
1243 | break; | |
f546c780 | 1244 | case SSH2_FXP_LSTAT: |
b5e300c2 | 1245 | process_lstat(); |
1246 | break; | |
f546c780 | 1247 | case SSH2_FXP_FSTAT: |
b5e300c2 | 1248 | process_fstat(); |
1249 | break; | |
f546c780 | 1250 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 1251 | process_setstat(); |
1252 | break; | |
f546c780 | 1253 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 1254 | process_fsetstat(); |
1255 | break; | |
f546c780 | 1256 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 1257 | process_opendir(); |
1258 | break; | |
f546c780 | 1259 | case SSH2_FXP_READDIR: |
b5e300c2 | 1260 | process_readdir(); |
1261 | break; | |
f546c780 | 1262 | case SSH2_FXP_REMOVE: |
b5e300c2 | 1263 | process_remove(); |
1264 | break; | |
f546c780 | 1265 | case SSH2_FXP_MKDIR: |
b5e300c2 | 1266 | process_mkdir(); |
1267 | break; | |
f546c780 | 1268 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1269 | process_rmdir(); |
1270 | break; | |
f546c780 | 1271 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1272 | process_realpath(); |
1273 | break; | |
f546c780 | 1274 | case SSH2_FXP_STAT: |
b5e300c2 | 1275 | process_stat(); |
1276 | break; | |
f546c780 | 1277 | case SSH2_FXP_RENAME: |
b5e300c2 | 1278 | process_rename(); |
1279 | break; | |
3a7fe5ba | 1280 | case SSH2_FXP_READLINK: |
1281 | process_readlink(); | |
1282 | break; | |
1283 | case SSH2_FXP_SYMLINK: | |
1284 | process_symlink(); | |
1285 | break; | |
f546c780 | 1286 | case SSH2_FXP_EXTENDED: |
1287 | process_extended(); | |
1288 | break; | |
b5e300c2 | 1289 | default: |
1290 | error("Unknown message %d", type); | |
1291 | break; | |
1292 | } | |
9b4ac641 | 1293 | /* discard the remaining bytes from the current packet */ |
c33ba17e | 1294 | if (buf_len < buffer_len(&iqueue)) { |
1295 | error("iqueue grew unexpectedly"); | |
1296 | sftp_server_cleanup_exit(255); | |
1297 | } | |
9b4ac641 | 1298 | consumed = buf_len - buffer_len(&iqueue); |
c33ba17e | 1299 | if (msg_len < consumed) { |
1300 | error("msg_len %d < consumed %d", msg_len, consumed); | |
1301 | sftp_server_cleanup_exit(255); | |
1302 | } | |
9b4ac641 | 1303 | if (msg_len > consumed) |
1304 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1305 | } |
1306 | ||
a13880bb | 1307 | /* Cleanup handler that logs active handles upon normal exit */ |
1308 | void | |
c33ba17e | 1309 | sftp_server_cleanup_exit(int i) |
a13880bb | 1310 | { |
1311 | if (pw != NULL && client_addr != NULL) { | |
1312 | handle_log_exit(); | |
1313 | logit("session closed for local user %s from [%s]", | |
1314 | pw->pw_name, client_addr); | |
1315 | } | |
1316 | _exit(i); | |
1317 | } | |
1318 | ||
1319 | static void | |
c33ba17e | 1320 | sftp_server_usage(void) |
a13880bb | 1321 | { |
1322 | extern char *__progname; | |
1323 | ||
1324 | fprintf(stderr, | |
99c5cf8e | 1325 | "usage: %s [-he] [-l log_level] [-f log_facility] [-u umask]\n", |
1326 | __progname); | |
a13880bb | 1327 | exit(1); |
1328 | } | |
1329 | ||
b5e300c2 | 1330 | int |
db49deeb | 1331 | sftp_server_main(int argc, char **argv, struct passwd *user_pw) |
b5e300c2 | 1332 | { |
c8d75031 | 1333 | fd_set *rset, *wset; |
a13880bb | 1334 | int in, out, max, ch, skipargs = 0, log_stderr = 0; |
c8d75031 | 1335 | ssize_t len, olen, set_size; |
a13880bb | 1336 | SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; |
72dea2d9 | 1337 | char *cp, buf[4*4096]; |
99c5cf8e | 1338 | const char *errmsg; |
1339 | mode_t mask; | |
a13880bb | 1340 | |
a13880bb | 1341 | extern char *optarg; |
1342 | extern char *__progname; | |
b5e300c2 | 1343 | |
a13880bb | 1344 | __progname = ssh_get_progname(argv[0]); |
1345 | log_init(__progname, log_level, log_facility, log_stderr); | |
1346 | ||
99c5cf8e | 1347 | while (!skipargs && (ch = getopt(argc, argv, "f:l:u:che")) != -1) { |
a13880bb | 1348 | switch (ch) { |
1349 | case 'c': | |
1350 | /* | |
1351 | * Ignore all arguments if we are invoked as a | |
31652869 | 1352 | * shell using "sftp-server -c command" |
a13880bb | 1353 | */ |
1354 | skipargs = 1; | |
1355 | break; | |
1356 | case 'e': | |
1357 | log_stderr = 1; | |
1358 | break; | |
1359 | case 'l': | |
1360 | log_level = log_level_number(optarg); | |
1361 | if (log_level == SYSLOG_LEVEL_NOT_SET) | |
1362 | error("Invalid log level \"%s\"", optarg); | |
1363 | break; | |
1364 | case 'f': | |
1365 | log_facility = log_facility_number(optarg); | |
f8f7ecf5 | 1366 | if (log_facility == SYSLOG_FACILITY_NOT_SET) |
a13880bb | 1367 | error("Invalid log facility \"%s\"", optarg); |
1368 | break; | |
99c5cf8e | 1369 | case 'u': |
1370 | mask = (mode_t)strtonum(optarg, 0, 0777, &errmsg); | |
57a6b5dd | 1371 | if (errmsg != NULL) |
99c5cf8e | 1372 | fatal("Invalid umask \"%s\": %s", |
1373 | optarg, errmsg); | |
1374 | (void)umask(mask); | |
1375 | break; | |
a13880bb | 1376 | case 'h': |
1377 | default: | |
c33ba17e | 1378 | sftp_server_usage(); |
a13880bb | 1379 | } |
1380 | } | |
61b3a2bc | 1381 | |
a13880bb | 1382 | log_init(__progname, log_level, log_facility, log_stderr); |
b5e300c2 | 1383 | |
a13880bb | 1384 | if ((cp = getenv("SSH_CONNECTION")) != NULL) { |
1385 | client_addr = xstrdup(cp); | |
c33ba17e | 1386 | if ((cp = strchr(client_addr, ' ')) == NULL) { |
1387 | error("Malformed SSH_CONNECTION variable: \"%s\"", | |
a13880bb | 1388 | getenv("SSH_CONNECTION")); |
c33ba17e | 1389 | sftp_server_cleanup_exit(255); |
1390 | } | |
a13880bb | 1391 | *cp = '\0'; |
1392 | } else | |
1393 | client_addr = xstrdup("UNKNOWN"); | |
1394 | ||
db49deeb | 1395 | pw = pwcopy(user_pw); |
a13880bb | 1396 | |
1397 | logit("session opened for local user %s from [%s]", | |
1398 | pw->pw_name, client_addr); | |
1399 | ||
b5e300c2 | 1400 | in = dup(STDIN_FILENO); |
1401 | out = dup(STDOUT_FILENO); | |
1402 | ||
fe56c12b | 1403 | #ifdef HAVE_CYGWIN |
1404 | setmode(in, O_BINARY); | |
1405 | setmode(out, O_BINARY); | |
1406 | #endif | |
1407 | ||
b5e300c2 | 1408 | max = 0; |
1409 | if (in > max) | |
1410 | max = in; | |
1411 | if (out > max) | |
1412 | max = out; | |
1413 | ||
1414 | buffer_init(&iqueue); | |
1415 | buffer_init(&oqueue); | |
1416 | ||
c8d75031 | 1417 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1418 | rset = (fd_set *)xmalloc(set_size); | |
1419 | wset = (fd_set *)xmalloc(set_size); | |
1420 | ||
b5e300c2 | 1421 | for (;;) { |
c8d75031 | 1422 | memset(rset, 0, set_size); |
1423 | memset(wset, 0, set_size); | |
b5e300c2 | 1424 | |
72dea2d9 | 1425 | /* |
1426 | * Ensure that we can read a full buffer and handle | |
1427 | * the worst-case length packet it can generate, | |
1428 | * otherwise apply backpressure by stopping reads. | |
1429 | */ | |
1430 | if (buffer_check_alloc(&iqueue, sizeof(buf)) && | |
1431 | buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) | |
1432 | FD_SET(in, rset); | |
1433 | ||
b5e300c2 | 1434 | olen = buffer_len(&oqueue); |
1435 | if (olen > 0) | |
c8d75031 | 1436 | FD_SET(out, wset); |
b5e300c2 | 1437 | |
c8d75031 | 1438 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1439 | if (errno == EINTR) |
1440 | continue; | |
a13880bb | 1441 | error("select: %s", strerror(errno)); |
c33ba17e | 1442 | sftp_server_cleanup_exit(2); |
b5e300c2 | 1443 | } |
1444 | ||
1445 | /* copy stdin to iqueue */ | |
c8d75031 | 1446 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1447 | len = read(in, buf, sizeof buf); |
1448 | if (len == 0) { | |
1449 | debug("read eof"); | |
c33ba17e | 1450 | sftp_server_cleanup_exit(0); |
b5e300c2 | 1451 | } else if (len < 0) { |
a13880bb | 1452 | error("read: %s", strerror(errno)); |
c33ba17e | 1453 | sftp_server_cleanup_exit(1); |
b5e300c2 | 1454 | } else { |
1455 | buffer_append(&iqueue, buf, len); | |
1456 | } | |
1457 | } | |
1458 | /* send oqueue to stdout */ | |
c8d75031 | 1459 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1460 | len = write(out, buffer_ptr(&oqueue), olen); |
1461 | if (len < 0) { | |
a13880bb | 1462 | error("write: %s", strerror(errno)); |
c33ba17e | 1463 | sftp_server_cleanup_exit(1); |
b5e300c2 | 1464 | } else { |
1465 | buffer_consume(&oqueue, len); | |
1466 | } | |
1467 | } | |
72dea2d9 | 1468 | |
1469 | /* | |
1470 | * Process requests from client if we can fit the results | |
1471 | * into the output buffer, otherwise stop processing input | |
1472 | * and let the output queue drain. | |
1473 | */ | |
1474 | if (buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) | |
1475 | process(); | |
b5e300c2 | 1476 | } |
1477 | } |