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449092f6 CV |
1 | /* Remote File-I/O communications |
2 | ||
3 | Copyright 2003 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* See the GDB User Guide for details of the GDB remote protocol. */ | |
23 | ||
24 | #include "defs.h" | |
25 | #include "gdb_string.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "remote.h" | |
28 | #include "gdb/fileio.h" | |
0ef75e11 AC |
29 | #include "gdb_wait.h" |
30 | #include "gdb_stat.h" | |
cd90e54f | 31 | #include "remote-fileio.h" |
449092f6 | 32 | |
449092f6 CV |
33 | #include <fcntl.h> |
34 | #include <sys/time.h> | |
449092f6 | 35 | #ifdef __CYGWIN__ |
0ef75e11 | 36 | #include <sys/cygwin.h> /* For cygwin_conv_to_full_posix_path. */ |
449092f6 | 37 | #endif |
449092f6 CV |
38 | #include <signal.h> |
39 | ||
40 | static struct { | |
41 | int *fd_map; | |
42 | int fd_map_size; | |
43 | } remote_fio_data; | |
44 | ||
45 | #define FIO_FD_INVALID -1 | |
46 | #define FIO_FD_CONSOLE_IN -2 | |
47 | #define FIO_FD_CONSOLE_OUT -3 | |
48 | ||
49 | static int remote_fio_system_call_allowed = 0; | |
50 | ||
51 | static int | |
cbcdb1f5 | 52 | remote_fileio_init_fd_map (void) |
449092f6 CV |
53 | { |
54 | int i; | |
55 | ||
56 | if (!remote_fio_data.fd_map) | |
57 | { | |
58 | remote_fio_data.fd_map = (int *) xmalloc (10 * sizeof (int)); | |
59 | remote_fio_data.fd_map_size = 10; | |
60 | remote_fio_data.fd_map[0] = FIO_FD_CONSOLE_IN; | |
61 | remote_fio_data.fd_map[1] = FIO_FD_CONSOLE_OUT; | |
62 | remote_fio_data.fd_map[2] = FIO_FD_CONSOLE_OUT; | |
63 | for (i = 3; i < 10; ++i) | |
64 | remote_fio_data.fd_map[i] = FIO_FD_INVALID; | |
65 | } | |
66 | return 3; | |
67 | } | |
68 | ||
69 | static int | |
cbcdb1f5 | 70 | remote_fileio_resize_fd_map (void) |
449092f6 CV |
71 | { |
72 | if (!remote_fio_data.fd_map) | |
73 | return remote_fileio_init_fd_map (); | |
74 | remote_fio_data.fd_map_size += 10; | |
75 | remote_fio_data.fd_map = | |
76 | (int *) xrealloc (remote_fio_data.fd_map, | |
77 | remote_fio_data.fd_map_size * sizeof (int)); | |
78 | return remote_fio_data.fd_map_size - 10; | |
79 | } | |
80 | ||
81 | static int | |
cbcdb1f5 | 82 | remote_fileio_next_free_fd (void) |
449092f6 CV |
83 | { |
84 | int i; | |
85 | ||
86 | for (i = 0; i < remote_fio_data.fd_map_size; ++i) | |
87 | if (remote_fio_data.fd_map[i] == FIO_FD_INVALID) | |
88 | return i; | |
89 | return remote_fileio_resize_fd_map (); | |
90 | } | |
91 | ||
92 | static int | |
93 | remote_fileio_fd_to_targetfd (int fd) | |
94 | { | |
95 | int target_fd = remote_fileio_next_free_fd (); | |
96 | remote_fio_data.fd_map[target_fd] = fd; | |
97 | return target_fd; | |
98 | } | |
99 | ||
100 | static int | |
101 | remote_fileio_map_fd (int target_fd) | |
102 | { | |
103 | remote_fileio_init_fd_map (); | |
104 | if (target_fd < 0 || target_fd >= remote_fio_data.fd_map_size) | |
105 | return FIO_FD_INVALID; | |
106 | return remote_fio_data.fd_map[target_fd]; | |
107 | } | |
108 | ||
109 | static void | |
110 | remote_fileio_close_target_fd (int target_fd) | |
111 | { | |
112 | remote_fileio_init_fd_map (); | |
113 | if (target_fd >= 0 && target_fd < remote_fio_data.fd_map_size) | |
114 | remote_fio_data.fd_map[target_fd] = FIO_FD_INVALID; | |
115 | } | |
116 | ||
117 | static int | |
118 | remote_fileio_oflags_to_host (long flags) | |
119 | { | |
120 | int hflags = 0; | |
121 | ||
122 | if (flags & FILEIO_O_CREAT) | |
123 | hflags |= O_CREAT; | |
124 | if (flags & FILEIO_O_EXCL) | |
125 | hflags |= O_EXCL; | |
126 | if (flags & FILEIO_O_TRUNC) | |
127 | hflags |= O_TRUNC; | |
128 | if (flags & FILEIO_O_APPEND) | |
129 | hflags |= O_APPEND; | |
130 | if (flags & FILEIO_O_RDONLY) | |
131 | hflags |= O_RDONLY; | |
132 | if (flags & FILEIO_O_WRONLY) | |
133 | hflags |= O_WRONLY; | |
134 | if (flags & FILEIO_O_RDWR) | |
135 | hflags |= O_RDWR; | |
136 | /* On systems supporting binary and text mode, always open files in | |
137 | binary mode. */ | |
138 | #ifdef O_BINARY | |
139 | hflags |= O_BINARY; | |
140 | #endif | |
141 | return hflags; | |
142 | } | |
143 | ||
144 | static mode_t | |
145 | remote_fileio_mode_to_host (long mode, int open_call) | |
146 | { | |
147 | mode_t hmode = 0; | |
148 | ||
149 | if (!open_call) | |
150 | { | |
151 | if (mode & FILEIO_S_IFREG) | |
152 | hmode |= S_IFREG; | |
153 | if (mode & FILEIO_S_IFDIR) | |
154 | hmode |= S_IFDIR; | |
155 | if (mode & FILEIO_S_IFCHR) | |
156 | hmode |= S_IFCHR; | |
157 | } | |
158 | if (mode & FILEIO_S_IRUSR) | |
159 | hmode |= S_IRUSR; | |
160 | if (mode & FILEIO_S_IWUSR) | |
161 | hmode |= S_IWUSR; | |
162 | if (mode & FILEIO_S_IXUSR) | |
163 | hmode |= S_IXUSR; | |
164 | if (mode & FILEIO_S_IRGRP) | |
165 | hmode |= S_IRGRP; | |
166 | if (mode & FILEIO_S_IWGRP) | |
167 | hmode |= S_IWGRP; | |
168 | if (mode & FILEIO_S_IXGRP) | |
169 | hmode |= S_IXGRP; | |
170 | if (mode & FILEIO_S_IROTH) | |
171 | hmode |= S_IROTH; | |
172 | if (mode & FILEIO_S_IWOTH) | |
173 | hmode |= S_IWOTH; | |
174 | if (mode & FILEIO_S_IXOTH) | |
175 | hmode |= S_IXOTH; | |
176 | return hmode; | |
177 | } | |
178 | ||
cbcdb1f5 | 179 | static LONGEST |
449092f6 CV |
180 | remote_fileio_mode_to_target (mode_t mode) |
181 | { | |
182 | mode_t tmode = 0; | |
183 | ||
184 | if (mode & S_IFREG) | |
185 | tmode |= FILEIO_S_IFREG; | |
186 | if (mode & S_IFDIR) | |
187 | tmode |= FILEIO_S_IFDIR; | |
188 | if (mode & S_IFCHR) | |
189 | tmode |= FILEIO_S_IFCHR; | |
190 | if (mode & S_IRUSR) | |
191 | tmode |= FILEIO_S_IRUSR; | |
192 | if (mode & S_IWUSR) | |
193 | tmode |= FILEIO_S_IWUSR; | |
194 | if (mode & S_IXUSR) | |
195 | tmode |= FILEIO_S_IXUSR; | |
196 | if (mode & S_IRGRP) | |
197 | tmode |= FILEIO_S_IRGRP; | |
198 | if (mode & S_IWGRP) | |
199 | tmode |= FILEIO_S_IWGRP; | |
200 | if (mode & S_IXGRP) | |
201 | tmode |= FILEIO_S_IXGRP; | |
202 | if (mode & S_IROTH) | |
203 | tmode |= FILEIO_S_IROTH; | |
204 | if (mode & S_IWOTH) | |
205 | tmode |= FILEIO_S_IWOTH; | |
206 | if (mode & S_IXOTH) | |
207 | tmode |= FILEIO_S_IXOTH; | |
208 | return tmode; | |
209 | } | |
210 | ||
211 | static int | |
212 | remote_fileio_errno_to_target (int error) | |
213 | { | |
214 | switch (error) | |
215 | { | |
216 | case EPERM: | |
217 | return FILEIO_EPERM; | |
218 | case ENOENT: | |
219 | return FILEIO_ENOENT; | |
220 | case EINTR: | |
221 | return FILEIO_EINTR; | |
222 | case EIO: | |
223 | return FILEIO_EIO; | |
224 | case EBADF: | |
225 | return FILEIO_EBADF; | |
226 | case EACCES: | |
227 | return FILEIO_EACCES; | |
228 | case EFAULT: | |
229 | return FILEIO_EFAULT; | |
230 | case EBUSY: | |
231 | return FILEIO_EBUSY; | |
232 | case EEXIST: | |
233 | return FILEIO_EEXIST; | |
234 | case ENODEV: | |
235 | return FILEIO_ENODEV; | |
236 | case ENOTDIR: | |
237 | return FILEIO_ENOTDIR; | |
238 | case EISDIR: | |
239 | return FILEIO_EISDIR; | |
240 | case EINVAL: | |
241 | return FILEIO_EINVAL; | |
242 | case ENFILE: | |
243 | return FILEIO_ENFILE; | |
244 | case EMFILE: | |
245 | return FILEIO_EMFILE; | |
246 | case EFBIG: | |
247 | return FILEIO_EFBIG; | |
248 | case ENOSPC: | |
249 | return FILEIO_ENOSPC; | |
250 | case ESPIPE: | |
251 | return FILEIO_ESPIPE; | |
252 | case EROFS: | |
253 | return FILEIO_EROFS; | |
254 | case ENOSYS: | |
255 | return FILEIO_ENOSYS; | |
256 | case ENAMETOOLONG: | |
257 | return FILEIO_ENAMETOOLONG; | |
258 | } | |
259 | return FILEIO_EUNKNOWN; | |
260 | } | |
261 | ||
262 | static int | |
263 | remote_fileio_seek_flag_to_host (long num, int *flag) | |
264 | { | |
265 | if (!flag) | |
266 | return 0; | |
267 | switch (num) | |
268 | { | |
269 | case FILEIO_SEEK_SET: | |
270 | *flag = SEEK_SET; | |
271 | break; | |
272 | case FILEIO_SEEK_CUR: | |
273 | *flag = SEEK_CUR; | |
274 | break; | |
275 | case FILEIO_SEEK_END: | |
276 | *flag = SEEK_END; | |
277 | break; | |
278 | default: | |
279 | return -1; | |
280 | } | |
281 | return 0; | |
282 | } | |
283 | ||
284 | static int | |
cbcdb1f5 | 285 | remote_fileio_extract_long (char **buf, LONGEST *retlong) |
449092f6 CV |
286 | { |
287 | char *c; | |
288 | int sign = 1; | |
289 | ||
290 | if (!buf || !*buf || !**buf || !retlong) | |
291 | return -1; | |
292 | c = strchr (*buf, ','); | |
293 | if (c) | |
294 | *c++ = '\0'; | |
295 | else | |
296 | c = strchr (*buf, '\0'); | |
297 | while (strchr ("+-", **buf)) | |
298 | { | |
299 | if (**buf == '-') | |
300 | sign = -sign; | |
301 | ++*buf; | |
302 | } | |
303 | for (*retlong = 0; **buf; ++*buf) | |
304 | { | |
305 | *retlong <<= 4; | |
306 | if (**buf >= '0' && **buf <= '9') | |
307 | *retlong += **buf - '0'; | |
308 | else if (**buf >= 'a' && **buf <= 'f') | |
309 | *retlong += **buf - 'a' + 10; | |
310 | else if (**buf >= 'A' && **buf <= 'F') | |
311 | *retlong += **buf - 'A' + 10; | |
312 | else | |
313 | return -1; | |
314 | } | |
315 | *retlong *= sign; | |
316 | *buf = c; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static int | |
321 | remote_fileio_extract_int (char **buf, long *retint) | |
322 | { | |
323 | int ret; | |
cbcdb1f5 | 324 | LONGEST retlong; |
449092f6 CV |
325 | |
326 | if (!retint) | |
327 | return -1; | |
cbcdb1f5 CV |
328 | ret = remote_fileio_extract_long (buf, &retlong); |
329 | if (!ret) | |
449092f6 CV |
330 | *retint = (long) retlong; |
331 | return ret; | |
332 | } | |
333 | ||
334 | static int | |
335 | remote_fileio_extract_ptr_w_len (char **buf, CORE_ADDR *ptrval, int *length) | |
336 | { | |
337 | char *c; | |
cbcdb1f5 | 338 | LONGEST retlong; |
449092f6 CV |
339 | |
340 | if (!buf || !*buf || !**buf || !ptrval || !length) | |
341 | return -1; | |
342 | c = strchr (*buf, '/'); | |
343 | if (!c) | |
344 | return -1; | |
345 | *c++ = '\0'; | |
346 | if (remote_fileio_extract_long (buf, &retlong)) | |
347 | return -1; | |
348 | *ptrval = (CORE_ADDR) retlong; | |
349 | *buf = c; | |
350 | if (remote_fileio_extract_long (buf, &retlong)) | |
351 | return -1; | |
352 | *length = (int) retlong; | |
353 | return 0; | |
354 | } | |
355 | ||
356 | /* Convert to big endian */ | |
357 | static void | |
cbcdb1f5 | 358 | remote_fileio_to_be (LONGEST num, char *buf, int bytes) |
449092f6 CV |
359 | { |
360 | int i; | |
361 | ||
362 | for (i = 0; i < bytes; ++i) | |
363 | buf[i] = (num >> (8 * (bytes - i - 1))) & 0xff; | |
364 | } | |
365 | ||
366 | static void | |
367 | remote_fileio_to_fio_int (long num, fio_int_t fnum) | |
368 | { | |
cbcdb1f5 | 369 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
449092f6 CV |
370 | } |
371 | ||
372 | static void | |
373 | remote_fileio_to_fio_uint (long num, fio_uint_t fnum) | |
374 | { | |
cbcdb1f5 | 375 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
449092f6 CV |
376 | } |
377 | ||
378 | static void | |
379 | remote_fileio_to_fio_mode (mode_t num, fio_mode_t fnum) | |
380 | { | |
381 | remote_fileio_to_be (remote_fileio_mode_to_target(num), (char *) fnum, 4); | |
382 | } | |
383 | ||
384 | static void | |
385 | remote_fileio_to_fio_time (time_t num, fio_time_t fnum) | |
386 | { | |
cbcdb1f5 | 387 | remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4); |
449092f6 CV |
388 | } |
389 | ||
390 | static void | |
cbcdb1f5 | 391 | remote_fileio_to_fio_long (LONGEST num, fio_long_t fnum) |
449092f6 CV |
392 | { |
393 | remote_fileio_to_be (num, (char *) fnum, 8); | |
394 | } | |
395 | ||
396 | static void | |
cbcdb1f5 | 397 | remote_fileio_to_fio_ulong (LONGEST num, fio_ulong_t fnum) |
449092f6 CV |
398 | { |
399 | remote_fileio_to_be (num, (char *) fnum, 8); | |
400 | } | |
401 | ||
402 | static void | |
403 | remote_fileio_to_fio_stat (struct stat *st, struct fio_stat *fst) | |
404 | { | |
405 | /* `st_dev' is set in the calling function */ | |
406 | remote_fileio_to_fio_uint ((long) st->st_ino, fst->fst_ino); | |
407 | remote_fileio_to_fio_mode (st->st_mode, fst->fst_mode); | |
408 | remote_fileio_to_fio_uint ((long) st->st_nlink, fst->fst_nlink); | |
409 | remote_fileio_to_fio_uint ((long) st->st_uid, fst->fst_uid); | |
410 | remote_fileio_to_fio_uint ((long) st->st_gid, fst->fst_gid); | |
411 | remote_fileio_to_fio_uint ((long) st->st_rdev, fst->fst_rdev); | |
cbcdb1f5 CV |
412 | remote_fileio_to_fio_ulong ((LONGEST) st->st_size, fst->fst_size); |
413 | remote_fileio_to_fio_ulong ((LONGEST) st->st_blksize, fst->fst_blksize); | |
1dd727e9 | 414 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
cbcdb1f5 | 415 | remote_fileio_to_fio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks); |
1dd727e9 EZ |
416 | #else |
417 | /* FIXME: This is correct for DJGPP, but other systems that don't | |
418 | have st_blocks, if any, might prefer 512 instead of st_blksize. | |
419 | (eliz, 30-12-2003) */ | |
420 | remote_fileio_to_fio_ulong (((LONGEST) st->st_size + st->st_blksize - 1) | |
421 | / (LONGEST) st->st_blksize, | |
422 | fst->fst_blocks); | |
423 | #endif | |
449092f6 CV |
424 | remote_fileio_to_fio_time (st->st_atime, fst->fst_atime); |
425 | remote_fileio_to_fio_time (st->st_mtime, fst->fst_mtime); | |
426 | remote_fileio_to_fio_time (st->st_ctime, fst->fst_ctime); | |
427 | } | |
428 | ||
429 | static void | |
430 | remote_fileio_to_fio_timeval (struct timeval *tv, struct fio_timeval *ftv) | |
431 | { | |
432 | remote_fileio_to_fio_time (tv->tv_sec, ftv->ftv_sec); | |
433 | remote_fileio_to_fio_long (tv->tv_usec, ftv->ftv_usec); | |
434 | } | |
435 | ||
436 | static int remote_fio_ctrl_c_flag = 0; | |
437 | static int remote_fio_no_longjmp = 0; | |
449092f6 CV |
438 | |
439 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
440 | static struct sigaction remote_fio_sa; | |
441 | static struct sigaction remote_fio_osa; | |
442 | #else | |
443 | static void (*remote_fio_ofunc)(int); | |
444 | #endif | |
445 | ||
446 | static void | |
cbcdb1f5 | 447 | remote_fileio_sig_init (void) |
449092f6 CV |
448 | { |
449 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
450 | remote_fio_sa.sa_handler = SIG_IGN; | |
451 | sigemptyset (&remote_fio_sa.sa_mask); | |
452 | remote_fio_sa.sa_flags = 0; | |
453 | sigaction (SIGINT, &remote_fio_sa, &remote_fio_osa); | |
454 | #else | |
455 | remote_fio_ofunc = signal (SIGINT, SIG_IGN); | |
456 | #endif | |
457 | } | |
458 | ||
459 | static void | |
460 | remote_fileio_sig_set (void (*sigint_func)(int)) | |
461 | { | |
462 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
463 | remote_fio_sa.sa_handler = sigint_func; | |
464 | sigemptyset (&remote_fio_sa.sa_mask); | |
465 | remote_fio_sa.sa_flags = 0; | |
466 | sigaction (SIGINT, &remote_fio_sa, NULL); | |
467 | #else | |
468 | signal (SIGINT, sigint_func); | |
469 | #endif | |
470 | } | |
471 | ||
472 | static void | |
cbcdb1f5 | 473 | remote_fileio_sig_exit (void) |
449092f6 CV |
474 | { |
475 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
476 | sigaction (SIGINT, &remote_fio_osa, NULL); | |
477 | #else | |
478 | signal (SIGINT, remote_fio_ofunc); | |
479 | #endif | |
480 | } | |
481 | ||
482 | static void | |
483 | remote_fileio_ctrl_c_signal_handler (int signo) | |
484 | { | |
485 | remote_fileio_sig_set (SIG_IGN); | |
486 | remote_fio_ctrl_c_flag = 1; | |
487 | if (!remote_fio_no_longjmp) | |
488 | throw_exception (RETURN_QUIT); | |
489 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); | |
490 | } | |
491 | ||
492 | static void | |
493 | remote_fileio_reply (int retcode, int error) | |
494 | { | |
495 | char buf[32]; | |
496 | ||
497 | remote_fileio_sig_set (SIG_IGN); | |
498 | strcpy (buf, "F"); | |
499 | if (retcode < 0) | |
500 | { | |
501 | strcat (buf, "-"); | |
502 | retcode = -retcode; | |
503 | } | |
504 | sprintf (buf + strlen (buf), "%x", retcode); | |
505 | if (error || remote_fio_ctrl_c_flag) | |
506 | { | |
507 | if (error && remote_fio_ctrl_c_flag) | |
508 | error = FILEIO_EINTR; | |
509 | if (error < 0) | |
510 | { | |
511 | strcat (buf, "-"); | |
512 | error = -error; | |
513 | } | |
514 | sprintf (buf + strlen (buf), ",%x", error); | |
515 | if (remote_fio_ctrl_c_flag) | |
516 | strcat (buf, ",C"); | |
517 | } | |
518 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); | |
519 | putpkt (buf); | |
520 | } | |
521 | ||
522 | static void | |
cbcdb1f5 | 523 | remote_fileio_ioerror (void) |
449092f6 CV |
524 | { |
525 | remote_fileio_reply (-1, FILEIO_EIO); | |
526 | } | |
527 | ||
528 | static void | |
cbcdb1f5 | 529 | remote_fileio_badfd (void) |
449092f6 CV |
530 | { |
531 | remote_fileio_reply (-1, FILEIO_EBADF); | |
532 | } | |
533 | ||
534 | static void | |
535 | remote_fileio_return_errno (int retcode) | |
536 | { | |
537 | remote_fileio_reply (retcode, | |
538 | retcode < 0 ? remote_fileio_errno_to_target (errno) : 0); | |
539 | } | |
540 | ||
541 | static void | |
542 | remote_fileio_return_success (int retcode) | |
543 | { | |
544 | remote_fileio_reply (retcode, 0); | |
545 | } | |
546 | ||
547 | /* Wrapper function for remote_write_bytes() which has the disadvantage to | |
548 | write only one packet, regardless of the requested number of bytes to | |
549 | transfer. This wrapper calls remote_write_bytes() as often as needed. */ | |
550 | static int | |
551 | remote_fileio_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) | |
552 | { | |
553 | int ret = 0, written; | |
554 | ||
555 | while (len > 0 && (written = remote_write_bytes (memaddr, myaddr, len)) > 0) | |
556 | { | |
557 | len -= written; | |
558 | memaddr += written; | |
559 | myaddr += written; | |
560 | ret += written; | |
561 | } | |
562 | return ret; | |
563 | } | |
564 | ||
565 | static void | |
566 | remote_fileio_func_open (char *buf) | |
567 | { | |
568 | CORE_ADDR ptrval; | |
569 | int length, retlength; | |
570 | long num; | |
571 | int flags, fd; | |
572 | mode_t mode; | |
573 | char *pathname; | |
574 | struct stat st; | |
575 | ||
576 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ | |
577 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
578 | { | |
579 | remote_fileio_ioerror (); | |
580 | return; | |
581 | } | |
582 | /* 2. Parameter: open flags */ | |
583 | if (remote_fileio_extract_int (&buf, &num)) | |
584 | { | |
585 | remote_fileio_ioerror (); | |
586 | return; | |
587 | } | |
588 | flags = remote_fileio_oflags_to_host (num); | |
589 | /* 3. Parameter: open mode */ | |
590 | if (remote_fileio_extract_int (&buf, &num)) | |
591 | { | |
592 | remote_fileio_ioerror (); | |
593 | return; | |
594 | } | |
595 | mode = remote_fileio_mode_to_host (num, 1); | |
596 | ||
597 | /* Request pathname using 'm' packet */ | |
598 | pathname = alloca (length); | |
599 | retlength = remote_read_bytes (ptrval, pathname, length); | |
600 | if (retlength != length) | |
601 | { | |
602 | remote_fileio_ioerror (); | |
603 | return; | |
604 | } | |
605 | ||
606 | /* Check if pathname exists and is not a regular file or directory. If so, | |
607 | return an appropriate error code. Same for trying to open directories | |
608 | for writing. */ | |
609 | if (!stat (pathname, &st)) | |
610 | { | |
611 | if (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) | |
612 | { | |
613 | remote_fileio_reply (-1, FILEIO_ENODEV); | |
614 | return; | |
615 | } | |
616 | if (S_ISDIR (st.st_mode) | |
617 | && ((flags & O_WRONLY) == O_WRONLY || (flags & O_RDWR) == O_RDWR)) | |
618 | { | |
619 | remote_fileio_reply (-1, FILEIO_EISDIR); | |
620 | return; | |
621 | } | |
622 | } | |
623 | ||
624 | remote_fio_no_longjmp = 1; | |
625 | fd = open (pathname, flags, mode); | |
626 | if (fd < 0) | |
627 | { | |
628 | remote_fileio_return_errno (-1); | |
629 | return; | |
630 | } | |
631 | ||
632 | fd = remote_fileio_fd_to_targetfd (fd); | |
633 | remote_fileio_return_success (fd); | |
634 | } | |
635 | ||
636 | static void | |
637 | remote_fileio_func_close (char *buf) | |
638 | { | |
639 | long num; | |
640 | int fd; | |
641 | ||
642 | /* Parameter: file descriptor */ | |
643 | if (remote_fileio_extract_int (&buf, &num)) | |
644 | { | |
645 | remote_fileio_ioerror (); | |
646 | return; | |
647 | } | |
cbcdb1f5 CV |
648 | fd = remote_fileio_map_fd ((int) num); |
649 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
650 | { |
651 | remote_fileio_badfd (); | |
652 | return; | |
653 | } | |
654 | ||
655 | remote_fio_no_longjmp = 1; | |
656 | if (fd != FIO_FD_CONSOLE_IN && fd != FIO_FD_CONSOLE_OUT && close (fd)) | |
657 | remote_fileio_return_errno (-1); | |
658 | remote_fileio_close_target_fd ((int) num); | |
659 | remote_fileio_return_success (0); | |
660 | } | |
661 | ||
662 | static void | |
663 | remote_fileio_func_read (char *buf) | |
664 | { | |
665 | long target_fd, num; | |
cbcdb1f5 | 666 | LONGEST lnum; |
449092f6 CV |
667 | CORE_ADDR ptrval; |
668 | int fd, ret, retlength; | |
669 | char *buffer; | |
670 | size_t length; | |
671 | off_t old_offset, new_offset; | |
672 | ||
673 | /* 1. Parameter: file descriptor */ | |
674 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
675 | { | |
676 | remote_fileio_ioerror (); | |
677 | return; | |
678 | } | |
cbcdb1f5 CV |
679 | fd = remote_fileio_map_fd ((int) target_fd); |
680 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
681 | { |
682 | remote_fileio_badfd (); | |
683 | return; | |
684 | } | |
685 | /* 2. Parameter: buffer pointer */ | |
686 | if (remote_fileio_extract_long (&buf, &lnum)) | |
687 | { | |
688 | remote_fileio_ioerror (); | |
689 | return; | |
690 | } | |
691 | ptrval = (CORE_ADDR) lnum; | |
692 | /* 3. Parameter: buffer length */ | |
693 | if (remote_fileio_extract_int (&buf, &num)) | |
694 | { | |
695 | remote_fileio_ioerror (); | |
696 | return; | |
697 | } | |
698 | length = (size_t) num; | |
699 | ||
700 | switch (fd) | |
701 | { | |
702 | case FIO_FD_CONSOLE_OUT: | |
703 | remote_fileio_badfd (); | |
704 | return; | |
705 | case FIO_FD_CONSOLE_IN: | |
706 | { | |
707 | static char *remaining_buf = NULL; | |
708 | static int remaining_length = 0; | |
709 | ||
710 | buffer = (char *) xmalloc (32768); | |
711 | if (remaining_buf) | |
712 | { | |
713 | remote_fio_no_longjmp = 1; | |
714 | if (remaining_length > length) | |
715 | { | |
716 | memcpy (buffer, remaining_buf, length); | |
717 | memmove (remaining_buf, remaining_buf + length, | |
718 | remaining_length - length); | |
719 | remaining_length -= length; | |
720 | ret = length; | |
721 | } | |
722 | else | |
723 | { | |
724 | memcpy (buffer, remaining_buf, remaining_length); | |
725 | xfree (remaining_buf); | |
726 | remaining_buf = NULL; | |
727 | ret = remaining_length; | |
728 | } | |
729 | } | |
730 | else | |
731 | { | |
732 | ret = ui_file_read (gdb_stdtargin, buffer, 32767); | |
733 | remote_fio_no_longjmp = 1; | |
734 | if (ret > 0 && (size_t)ret > length) | |
735 | { | |
736 | remaining_buf = (char *) xmalloc (ret - length); | |
737 | remaining_length = ret - length; | |
738 | memcpy (remaining_buf, buffer + length, remaining_length); | |
739 | ret = length; | |
740 | } | |
741 | } | |
742 | } | |
743 | break; | |
744 | default: | |
745 | buffer = (char *) xmalloc (length); | |
746 | /* POSIX defines EINTR behaviour of read in a weird way. It's allowed | |
747 | for read() to return -1 even if "some" bytes have been read. It | |
748 | has been corrected in SUSv2 but that doesn't help us much... | |
749 | Therefore a complete solution must check how many bytes have been | |
750 | read on EINTR to return a more reliable value to the target */ | |
751 | old_offset = lseek (fd, 0, SEEK_CUR); | |
752 | remote_fio_no_longjmp = 1; | |
753 | ret = read (fd, buffer, length); | |
754 | if (ret < 0 && errno == EINTR) | |
755 | { | |
756 | new_offset = lseek (fd, 0, SEEK_CUR); | |
757 | /* If some data has been read, return the number of bytes read. | |
758 | The Ctrl-C flag is set in remote_fileio_reply() anyway */ | |
759 | if (old_offset != new_offset) | |
760 | ret = new_offset - old_offset; | |
761 | } | |
762 | break; | |
763 | } | |
764 | ||
765 | if (ret > 0) | |
766 | { | |
767 | retlength = remote_fileio_write_bytes (ptrval, buffer, ret); | |
768 | if (retlength != ret) | |
769 | ret = -1; /* errno has been set to EIO in remote_fileio_write_bytes() */ | |
770 | } | |
771 | ||
772 | if (ret < 0) | |
773 | remote_fileio_return_errno (-1); | |
774 | else | |
775 | remote_fileio_return_success (ret); | |
776 | ||
777 | xfree (buffer); | |
778 | } | |
779 | ||
780 | static void | |
781 | remote_fileio_func_write (char *buf) | |
782 | { | |
783 | long target_fd, num; | |
cbcdb1f5 | 784 | LONGEST lnum; |
449092f6 CV |
785 | CORE_ADDR ptrval; |
786 | int fd, ret, retlength; | |
787 | char *buffer; | |
788 | size_t length; | |
789 | ||
790 | /* 1. Parameter: file descriptor */ | |
791 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
792 | { | |
793 | remote_fileio_ioerror (); | |
794 | return; | |
795 | } | |
cbcdb1f5 CV |
796 | fd = remote_fileio_map_fd ((int) target_fd); |
797 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
798 | { |
799 | remote_fileio_badfd (); | |
800 | return; | |
801 | } | |
802 | /* 2. Parameter: buffer pointer */ | |
803 | if (remote_fileio_extract_long (&buf, &lnum)) | |
804 | { | |
805 | remote_fileio_ioerror (); | |
806 | return; | |
807 | } | |
808 | ptrval = (CORE_ADDR) lnum; | |
809 | /* 3. Parameter: buffer length */ | |
810 | if (remote_fileio_extract_int (&buf, &num)) | |
811 | { | |
812 | remote_fileio_ioerror (); | |
813 | return; | |
814 | } | |
815 | length = (size_t) num; | |
816 | ||
817 | buffer = (char *) xmalloc (length); | |
818 | retlength = remote_read_bytes (ptrval, buffer, length); | |
819 | if (retlength != length) | |
820 | { | |
821 | xfree (buffer); | |
822 | remote_fileio_ioerror (); | |
823 | return; | |
824 | } | |
825 | ||
826 | remote_fio_no_longjmp = 1; | |
827 | switch (fd) | |
828 | { | |
829 | case FIO_FD_CONSOLE_IN: | |
830 | remote_fileio_badfd (); | |
831 | return; | |
832 | case FIO_FD_CONSOLE_OUT: | |
833 | ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr, buffer, | |
834 | length); | |
835 | gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr); | |
836 | ret = length; | |
837 | break; | |
838 | default: | |
839 | ret = write (fd, buffer, length); | |
840 | if (ret < 0 && errno == EACCES) | |
841 | errno = EBADF; /* Cygwin returns EACCESS when writing to a R/O file.*/ | |
842 | break; | |
843 | } | |
844 | ||
845 | if (ret < 0) | |
846 | remote_fileio_return_errno (-1); | |
847 | else | |
848 | remote_fileio_return_success (ret); | |
849 | ||
850 | xfree (buffer); | |
851 | } | |
852 | ||
853 | static void | |
854 | remote_fileio_func_lseek (char *buf) | |
855 | { | |
856 | long num; | |
cbcdb1f5 | 857 | LONGEST lnum; |
449092f6 CV |
858 | int fd, flag; |
859 | off_t offset, ret; | |
860 | ||
861 | /* 1. Parameter: file descriptor */ | |
862 | if (remote_fileio_extract_int (&buf, &num)) | |
863 | { | |
864 | remote_fileio_ioerror (); | |
865 | return; | |
866 | } | |
cbcdb1f5 CV |
867 | fd = remote_fileio_map_fd ((int) num); |
868 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
869 | { |
870 | remote_fileio_badfd (); | |
871 | return; | |
872 | } | |
873 | else if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) | |
874 | { | |
875 | remote_fileio_reply (-1, FILEIO_ESPIPE); | |
876 | return; | |
877 | } | |
878 | ||
879 | /* 2. Parameter: offset */ | |
880 | if (remote_fileio_extract_long (&buf, &lnum)) | |
881 | { | |
882 | remote_fileio_ioerror (); | |
883 | return; | |
884 | } | |
885 | offset = (off_t) lnum; | |
886 | /* 3. Parameter: flag */ | |
887 | if (remote_fileio_extract_int (&buf, &num)) | |
888 | { | |
889 | remote_fileio_ioerror (); | |
890 | return; | |
891 | } | |
892 | if (remote_fileio_seek_flag_to_host (num, &flag)) | |
893 | { | |
894 | remote_fileio_reply (-1, FILEIO_EINVAL); | |
895 | return; | |
896 | } | |
897 | ||
898 | remote_fio_no_longjmp = 1; | |
899 | ret = lseek (fd, offset, flag); | |
900 | ||
901 | if (ret == (off_t) -1) | |
902 | remote_fileio_return_errno (-1); | |
903 | else | |
904 | remote_fileio_return_success (ret); | |
905 | } | |
906 | ||
907 | static void | |
908 | remote_fileio_func_rename (char *buf) | |
909 | { | |
910 | CORE_ADDR ptrval; | |
911 | int length, retlength; | |
912 | char *oldpath, *newpath; | |
913 | int ret, of, nf; | |
914 | struct stat ost, nst; | |
915 | ||
916 | /* 1. Parameter: Ptr to oldpath / length incl. trailing zero */ | |
917 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
918 | { | |
919 | remote_fileio_ioerror (); | |
920 | return; | |
921 | } | |
922 | /* Request oldpath using 'm' packet */ | |
923 | oldpath = alloca (length); | |
924 | retlength = remote_read_bytes (ptrval, oldpath, length); | |
925 | if (retlength != length) | |
926 | { | |
927 | remote_fileio_ioerror (); | |
928 | return; | |
929 | } | |
930 | /* 2. Parameter: Ptr to newpath / length incl. trailing zero */ | |
931 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
932 | { | |
933 | remote_fileio_ioerror (); | |
934 | return; | |
935 | } | |
936 | /* Request newpath using 'm' packet */ | |
937 | newpath = alloca (length); | |
938 | retlength = remote_read_bytes (ptrval, newpath, length); | |
939 | if (retlength != length) | |
940 | { | |
941 | remote_fileio_ioerror (); | |
942 | return; | |
943 | } | |
944 | ||
945 | /* Only operate on regular files and directories */ | |
cbcdb1f5 CV |
946 | of = stat (oldpath, &ost); |
947 | nf = stat (newpath, &nst); | |
948 | if ((!of && !S_ISREG (ost.st_mode) && !S_ISDIR (ost.st_mode)) | |
949 | || (!nf && !S_ISREG (nst.st_mode) && !S_ISDIR (nst.st_mode))) | |
449092f6 CV |
950 | { |
951 | remote_fileio_reply (-1, FILEIO_EACCES); | |
952 | return; | |
953 | } | |
954 | ||
955 | remote_fio_no_longjmp = 1; | |
956 | ret = rename (oldpath, newpath); | |
957 | ||
958 | if (ret == -1) | |
959 | { | |
960 | /* Special case: newpath is a non-empty directory. Some systems | |
961 | return ENOTEMPTY, some return EEXIST. We coerce that to be | |
962 | always EEXIST. */ | |
963 | if (errno == ENOTEMPTY) | |
964 | errno = EEXIST; | |
965 | #ifdef __CYGWIN__ | |
966 | /* Workaround some Cygwin problems with correct errnos. */ | |
967 | if (errno == EACCES) | |
968 | { | |
969 | if (!of && !nf && S_ISDIR (nst.st_mode)) | |
970 | { | |
971 | if (S_ISREG (ost.st_mode)) | |
972 | errno = EISDIR; | |
973 | else | |
974 | { | |
975 | char oldfullpath[PATH_MAX + 1]; | |
976 | char newfullpath[PATH_MAX + 1]; | |
977 | int len; | |
978 | ||
979 | cygwin_conv_to_full_posix_path (oldpath, oldfullpath); | |
980 | cygwin_conv_to_full_posix_path (newpath, newfullpath); | |
981 | len = strlen (oldfullpath); | |
982 | if (newfullpath[len] == '/' | |
983 | && !strncmp (oldfullpath, newfullpath, len)) | |
984 | errno = EINVAL; | |
985 | else | |
986 | errno = EEXIST; | |
987 | } | |
988 | } | |
989 | } | |
990 | #endif | |
991 | ||
992 | remote_fileio_return_errno (-1); | |
993 | } | |
994 | else | |
995 | remote_fileio_return_success (ret); | |
996 | } | |
997 | ||
998 | static void | |
999 | remote_fileio_func_unlink (char *buf) | |
1000 | { | |
1001 | CORE_ADDR ptrval; | |
1002 | int length, retlength; | |
1003 | char *pathname; | |
1004 | int ret; | |
1005 | struct stat st; | |
1006 | ||
1007 | /* Parameter: Ptr to pathname / length incl. trailing zero */ | |
1008 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
1009 | { | |
1010 | remote_fileio_ioerror (); | |
1011 | return; | |
1012 | } | |
1013 | /* Request pathname using 'm' packet */ | |
1014 | pathname = alloca (length); | |
1015 | retlength = remote_read_bytes (ptrval, pathname, length); | |
1016 | if (retlength != length) | |
1017 | { | |
1018 | remote_fileio_ioerror (); | |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | /* Only operate on regular files (and directories, which allows to return | |
1023 | the correct return code) */ | |
1024 | if (!stat (pathname, &st) && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) | |
1025 | { | |
1026 | remote_fileio_reply (-1, FILEIO_ENODEV); | |
1027 | return; | |
1028 | } | |
1029 | ||
1030 | remote_fio_no_longjmp = 1; | |
1031 | ret = unlink (pathname); | |
1032 | ||
1033 | if (ret == -1) | |
1034 | remote_fileio_return_errno (-1); | |
1035 | else | |
1036 | remote_fileio_return_success (ret); | |
1037 | } | |
1038 | ||
1039 | static void | |
1040 | remote_fileio_func_stat (char *buf) | |
1041 | { | |
1042 | CORE_ADDR ptrval; | |
1043 | int ret, length, retlength; | |
1044 | char *pathname; | |
cbcdb1f5 | 1045 | LONGEST lnum; |
449092f6 CV |
1046 | struct stat st; |
1047 | struct fio_stat fst; | |
1048 | ||
1049 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ | |
1050 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
1051 | { | |
1052 | remote_fileio_ioerror (); | |
1053 | return; | |
1054 | } | |
1055 | /* Request pathname using 'm' packet */ | |
1056 | pathname = alloca (length); | |
1057 | retlength = remote_read_bytes (ptrval, pathname, length); | |
1058 | if (retlength != length) | |
1059 | { | |
1060 | remote_fileio_ioerror (); | |
1061 | return; | |
1062 | } | |
1063 | ||
1064 | /* 2. Parameter: Ptr to struct stat */ | |
1065 | if (remote_fileio_extract_long (&buf, &lnum)) | |
1066 | { | |
1067 | remote_fileio_ioerror (); | |
1068 | return; | |
1069 | } | |
1070 | ptrval = (CORE_ADDR) lnum; | |
1071 | ||
1072 | remote_fio_no_longjmp = 1; | |
1073 | ret = stat (pathname, &st); | |
1074 | ||
1075 | if (ret == -1) | |
1076 | { | |
1077 | remote_fileio_return_errno (-1); | |
1078 | return; | |
1079 | } | |
1080 | /* Only operate on regular files and directories */ | |
1081 | if (!ret && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) | |
1082 | { | |
1083 | remote_fileio_reply (-1, FILEIO_EACCES); | |
1084 | return; | |
1085 | } | |
1086 | if (ptrval) | |
1087 | { | |
1088 | remote_fileio_to_fio_stat (&st, &fst); | |
1089 | remote_fileio_to_fio_uint (0, fst.fst_dev); | |
1090 | ||
1091 | retlength = remote_fileio_write_bytes (ptrval, (char *) &fst, sizeof fst); | |
1092 | if (retlength != sizeof fst) | |
1093 | { | |
1094 | remote_fileio_return_errno (-1); | |
1095 | return; | |
1096 | } | |
1097 | } | |
1098 | remote_fileio_return_success (ret); | |
1099 | } | |
1100 | ||
1101 | static void | |
1102 | remote_fileio_func_fstat (char *buf) | |
1103 | { | |
1104 | CORE_ADDR ptrval; | |
1105 | int fd, ret, retlength; | |
1106 | long target_fd; | |
cbcdb1f5 | 1107 | LONGEST lnum; |
449092f6 CV |
1108 | struct stat st; |
1109 | struct fio_stat fst; | |
1110 | struct timeval tv; | |
1111 | ||
1112 | /* 1. Parameter: file descriptor */ | |
1113 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
1114 | { | |
1115 | remote_fileio_ioerror (); | |
1116 | return; | |
1117 | } | |
cbcdb1f5 CV |
1118 | fd = remote_fileio_map_fd ((int) target_fd); |
1119 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
1120 | { |
1121 | remote_fileio_badfd (); | |
1122 | return; | |
1123 | } | |
1124 | /* 2. Parameter: Ptr to struct stat */ | |
1125 | if (remote_fileio_extract_long (&buf, &lnum)) | |
1126 | { | |
1127 | remote_fileio_ioerror (); | |
1128 | return; | |
1129 | } | |
1130 | ptrval = (CORE_ADDR) lnum; | |
1131 | ||
1132 | remote_fio_no_longjmp = 1; | |
1133 | if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) | |
1134 | { | |
1135 | remote_fileio_to_fio_uint (1, fst.fst_dev); | |
1136 | st.st_mode = S_IFCHR | (fd == FIO_FD_CONSOLE_IN ? S_IRUSR : S_IWUSR); | |
1137 | st.st_nlink = 1; | |
1138 | st.st_uid = getuid (); | |
1139 | st.st_gid = getgid (); | |
1140 | st.st_rdev = 0; | |
1141 | st.st_size = 0; | |
1142 | st.st_blksize = 512; | |
1dd727e9 | 1143 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
449092f6 | 1144 | st.st_blocks = 0; |
1dd727e9 | 1145 | #endif |
449092f6 CV |
1146 | if (!gettimeofday (&tv, NULL)) |
1147 | st.st_atime = st.st_mtime = st.st_ctime = tv.tv_sec; | |
1148 | else | |
1149 | st.st_atime = st.st_mtime = st.st_ctime = (time_t) 0; | |
1150 | ret = 0; | |
1151 | } | |
1152 | else | |
1153 | ret = fstat (fd, &st); | |
1154 | ||
1155 | if (ret == -1) | |
1156 | { | |
1157 | remote_fileio_return_errno (-1); | |
1158 | return; | |
1159 | } | |
1160 | if (ptrval) | |
1161 | { | |
1162 | remote_fileio_to_fio_stat (&st, &fst); | |
1163 | ||
1164 | retlength = remote_fileio_write_bytes (ptrval, (char *) &fst, sizeof fst); | |
1165 | if (retlength != sizeof fst) | |
1166 | { | |
1167 | remote_fileio_return_errno (-1); | |
1168 | return; | |
1169 | } | |
1170 | } | |
1171 | remote_fileio_return_success (ret); | |
1172 | } | |
1173 | ||
1174 | static void | |
1175 | remote_fileio_func_gettimeofday (char *buf) | |
1176 | { | |
cbcdb1f5 | 1177 | LONGEST lnum; |
449092f6 CV |
1178 | CORE_ADDR ptrval; |
1179 | int ret, retlength; | |
1180 | struct timeval tv; | |
1181 | struct fio_timeval ftv; | |
1182 | ||
1183 | /* 1. Parameter: struct timeval pointer */ | |
1184 | if (remote_fileio_extract_long (&buf, &lnum)) | |
1185 | { | |
1186 | remote_fileio_ioerror (); | |
1187 | return; | |
1188 | } | |
1189 | ptrval = (CORE_ADDR) lnum; | |
1190 | /* 2. Parameter: some pointer value... */ | |
1191 | if (remote_fileio_extract_long (&buf, &lnum)) | |
1192 | { | |
1193 | remote_fileio_ioerror (); | |
1194 | return; | |
1195 | } | |
1196 | /* ...which has to be NULL */ | |
1197 | if (lnum) | |
1198 | { | |
1199 | remote_fileio_reply (-1, FILEIO_EINVAL); | |
1200 | return; | |
1201 | } | |
1202 | ||
1203 | remote_fio_no_longjmp = 1; | |
1204 | ret = gettimeofday (&tv, NULL); | |
1205 | ||
1206 | if (ret == -1) | |
1207 | { | |
1208 | remote_fileio_return_errno (-1); | |
1209 | return; | |
1210 | } | |
1211 | ||
1212 | if (ptrval) | |
1213 | { | |
1214 | remote_fileio_to_fio_timeval (&tv, &ftv); | |
1215 | ||
1216 | retlength = remote_fileio_write_bytes (ptrval, (char *) &ftv, sizeof ftv); | |
1217 | if (retlength != sizeof ftv) | |
1218 | { | |
1219 | remote_fileio_return_errno (-1); | |
1220 | return; | |
1221 | } | |
1222 | } | |
1223 | remote_fileio_return_success (ret); | |
1224 | } | |
1225 | ||
1226 | static void | |
1227 | remote_fileio_func_isatty (char *buf) | |
1228 | { | |
1229 | long target_fd; | |
1230 | int fd; | |
1231 | ||
1232 | /* Parameter: file descriptor */ | |
1233 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
1234 | { | |
1235 | remote_fileio_ioerror (); | |
1236 | return; | |
1237 | } | |
1238 | remote_fio_no_longjmp = 1; | |
1239 | fd = remote_fileio_map_fd ((int) target_fd); | |
1240 | remote_fileio_return_success (fd == FIO_FD_CONSOLE_IN || | |
1241 | fd == FIO_FD_CONSOLE_OUT ? 1 : 0); | |
1242 | } | |
1243 | ||
1244 | static void | |
1245 | remote_fileio_func_system (char *buf) | |
1246 | { | |
1247 | CORE_ADDR ptrval; | |
1248 | int ret, length, retlength; | |
1249 | char *cmdline; | |
1250 | ||
1251 | /* Check if system(3) has been explicitely allowed using the | |
1252 | `set remote system-call-allowed 1' command. If not, return | |
1253 | EPERM */ | |
1254 | if (!remote_fio_system_call_allowed) | |
1255 | { | |
1256 | remote_fileio_reply (-1, FILEIO_EPERM); | |
1257 | return; | |
1258 | } | |
1259 | ||
1260 | /* Parameter: Ptr to commandline / length incl. trailing zero */ | |
1261 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
1262 | { | |
1263 | remote_fileio_ioerror (); | |
1264 | return; | |
1265 | } | |
1266 | /* Request commandline using 'm' packet */ | |
1267 | cmdline = alloca (length); | |
1268 | retlength = remote_read_bytes (ptrval, cmdline, length); | |
1269 | if (retlength != length) | |
1270 | { | |
1271 | remote_fileio_ioerror (); | |
1272 | return; | |
1273 | } | |
1274 | ||
1275 | remote_fio_no_longjmp = 1; | |
1276 | ret = system (cmdline); | |
1277 | ||
1278 | if (ret == -1) | |
1279 | remote_fileio_return_errno (-1); | |
1280 | else | |
1281 | remote_fileio_return_success (WEXITSTATUS (ret)); | |
1282 | } | |
1283 | ||
1284 | static struct { | |
1285 | char *name; | |
1286 | void (*func)(char *); | |
1287 | } remote_fio_func_map[] = { | |
1288 | "open", remote_fileio_func_open, | |
1289 | "close", remote_fileio_func_close, | |
1290 | "read", remote_fileio_func_read, | |
1291 | "write", remote_fileio_func_write, | |
1292 | "lseek", remote_fileio_func_lseek, | |
1293 | "rename", remote_fileio_func_rename, | |
1294 | "unlink", remote_fileio_func_unlink, | |
1295 | "stat", remote_fileio_func_stat, | |
1296 | "fstat", remote_fileio_func_fstat, | |
1297 | "gettimeofday", remote_fileio_func_gettimeofday, | |
1298 | "isatty", remote_fileio_func_isatty, | |
1299 | "system", remote_fileio_func_system, | |
1300 | NULL, NULL | |
1301 | }; | |
1302 | ||
1303 | static int | |
1304 | do_remote_fileio_request (struct ui_out *uiout, void *buf_arg) | |
1305 | { | |
1306 | char *buf = buf_arg; | |
1307 | char *c; | |
1308 | int idx; | |
1309 | ||
1310 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); | |
1311 | ||
1312 | c = strchr (++buf, ','); | |
1313 | if (c) | |
1314 | *c++ = '\0'; | |
1315 | else | |
1316 | c = strchr (buf, '\0'); | |
1317 | for (idx = 0; remote_fio_func_map[idx].name; ++idx) | |
1318 | if (!strcmp (remote_fio_func_map[idx].name, buf)) | |
1319 | break; | |
1320 | if (!remote_fio_func_map[idx].name) /* ERROR: No such function. */ | |
1321 | return RETURN_ERROR; | |
1322 | remote_fio_func_map[idx].func (c); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | void | |
1327 | remote_fileio_request (char *buf) | |
1328 | { | |
1329 | int ex; | |
1330 | ||
1331 | remote_fileio_sig_init (); | |
1332 | ||
1333 | remote_fio_ctrl_c_flag = 0; | |
1334 | remote_fio_no_longjmp = 0; | |
1335 | ||
1336 | ex = catch_exceptions (uiout, do_remote_fileio_request, (void *)buf, | |
1337 | NULL, RETURN_MASK_ALL); | |
1338 | switch (ex) | |
1339 | { | |
1340 | case RETURN_ERROR: | |
1341 | remote_fileio_reply (-1, FILEIO_ENOSYS); | |
1342 | break; | |
1343 | case RETURN_QUIT: | |
1344 | remote_fileio_reply (-1, FILEIO_EINTR); | |
1345 | break; | |
1346 | default: | |
1347 | break; | |
1348 | } | |
1349 | ||
1350 | remote_fileio_sig_exit (); | |
1351 | } | |
1352 | ||
1353 | static void | |
1354 | set_system_call_allowed (char *args, int from_tty) | |
1355 | { | |
1356 | if (args) | |
1357 | { | |
1358 | char *arg_end; | |
1359 | int val = strtoul (args, &arg_end, 10); | |
1360 | if (*args && *arg_end == '\0') | |
1361 | { | |
1362 | remote_fio_system_call_allowed = !!val; | |
1363 | return; | |
1364 | } | |
1365 | } | |
1366 | error ("Illegal argument for \"set remote system-call-allowed\" command"); | |
1367 | } | |
1368 | ||
1369 | static void | |
1370 | show_system_call_allowed (char *args, int from_tty) | |
1371 | { | |
1372 | if (args) | |
1373 | error ("Garbage after \"show remote system-call-allowed\" command: `%s'", args); | |
1374 | printf_unfiltered ("Calling host system(3) call from target is %sallowed\n", | |
1375 | remote_fio_system_call_allowed ? "" : "not "); | |
1376 | } | |
1377 | ||
1378 | void | |
1379 | initialize_remote_fileio (struct cmd_list_element *remote_set_cmdlist, | |
1380 | struct cmd_list_element *remote_show_cmdlist) | |
1381 | { | |
1382 | add_cmd ("system-call-allowed", no_class, | |
1383 | set_system_call_allowed, | |
1384 | "Set if the host system(3) call is allowed for the target.\n", | |
1385 | &remote_set_cmdlist); | |
1386 | add_cmd ("system-call-allowed", no_class, | |
1387 | show_system_call_allowed, | |
1388 | "Show if the host system(3) call is allowed for the target.\n", | |
1389 | &remote_show_cmdlist); | |
1390 | } |