Commit | Line | Data |
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449092f6 CV |
1 | /* Remote File-I/O communications |
2 | ||
618f726f | 3 | Copyright (C) 2003-2016 Free Software Foundation, Inc. |
449092f6 CV |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
449092f6 CV |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
449092f6 | 19 | |
0df8b418 | 20 | /* See the GDB User Guide for details of the GDB remote protocol. */ |
449092f6 CV |
21 | |
22 | #include "defs.h" | |
449092f6 CV |
23 | #include "gdbcmd.h" |
24 | #include "remote.h" | |
0ef75e11 | 25 | #include "gdb_wait.h" |
53ce3c39 | 26 | #include <sys/stat.h> |
cd90e54f | 27 | #include "remote-fileio.h" |
b803fb0f | 28 | #include "event-loop.h" |
f7605bc2 | 29 | #include "target.h" |
0ba1096a | 30 | #include "filenames.h" |
614c279d | 31 | #include "filestuff.h" |
449092f6 | 32 | |
449092f6 | 33 | #include <fcntl.h> |
438e1e42 | 34 | #include "gdb_sys_time.h" |
449092f6 | 35 | #ifdef __CYGWIN__ |
c6ca3dab | 36 | #include <sys/cygwin.h> /* For cygwin_conv_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 | { | |
8d749320 | 58 | remote_fio_data.fd_map = XNEWVEC (int, 10); |
449092f6 CV |
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 | 71 | { |
9f8e6999 MG |
72 | int i = remote_fio_data.fd_map_size; |
73 | ||
449092f6 CV |
74 | if (!remote_fio_data.fd_map) |
75 | return remote_fileio_init_fd_map (); | |
76 | remote_fio_data.fd_map_size += 10; | |
77 | remote_fio_data.fd_map = | |
78 | (int *) xrealloc (remote_fio_data.fd_map, | |
79 | remote_fio_data.fd_map_size * sizeof (int)); | |
9f8e6999 MG |
80 | for (; i < remote_fio_data.fd_map_size; i++) |
81 | remote_fio_data.fd_map[i] = FIO_FD_INVALID; | |
449092f6 CV |
82 | return remote_fio_data.fd_map_size - 10; |
83 | } | |
84 | ||
85 | static int | |
cbcdb1f5 | 86 | remote_fileio_next_free_fd (void) |
449092f6 CV |
87 | { |
88 | int i; | |
89 | ||
90 | for (i = 0; i < remote_fio_data.fd_map_size; ++i) | |
91 | if (remote_fio_data.fd_map[i] == FIO_FD_INVALID) | |
92 | return i; | |
93 | return remote_fileio_resize_fd_map (); | |
94 | } | |
95 | ||
96 | static int | |
97 | remote_fileio_fd_to_targetfd (int fd) | |
98 | { | |
99 | int target_fd = remote_fileio_next_free_fd (); | |
123f5f96 | 100 | |
449092f6 CV |
101 | remote_fio_data.fd_map[target_fd] = fd; |
102 | return target_fd; | |
103 | } | |
104 | ||
105 | static int | |
106 | remote_fileio_map_fd (int target_fd) | |
107 | { | |
108 | remote_fileio_init_fd_map (); | |
109 | if (target_fd < 0 || target_fd >= remote_fio_data.fd_map_size) | |
110 | return FIO_FD_INVALID; | |
111 | return remote_fio_data.fd_map[target_fd]; | |
112 | } | |
113 | ||
114 | static void | |
115 | remote_fileio_close_target_fd (int target_fd) | |
116 | { | |
117 | remote_fileio_init_fd_map (); | |
118 | if (target_fd >= 0 && target_fd < remote_fio_data.fd_map_size) | |
119 | remote_fio_data.fd_map[target_fd] = FIO_FD_INVALID; | |
120 | } | |
121 | ||
122 | static int | |
123 | remote_fileio_oflags_to_host (long flags) | |
124 | { | |
125 | int hflags = 0; | |
126 | ||
127 | if (flags & FILEIO_O_CREAT) | |
128 | hflags |= O_CREAT; | |
129 | if (flags & FILEIO_O_EXCL) | |
130 | hflags |= O_EXCL; | |
131 | if (flags & FILEIO_O_TRUNC) | |
132 | hflags |= O_TRUNC; | |
133 | if (flags & FILEIO_O_APPEND) | |
134 | hflags |= O_APPEND; | |
135 | if (flags & FILEIO_O_RDONLY) | |
136 | hflags |= O_RDONLY; | |
137 | if (flags & FILEIO_O_WRONLY) | |
138 | hflags |= O_WRONLY; | |
139 | if (flags & FILEIO_O_RDWR) | |
140 | hflags |= O_RDWR; | |
141 | /* On systems supporting binary and text mode, always open files in | |
0df8b418 | 142 | binary mode. */ |
449092f6 CV |
143 | #ifdef O_BINARY |
144 | hflags |= O_BINARY; | |
145 | #endif | |
146 | return hflags; | |
147 | } | |
148 | ||
149 | static mode_t | |
150 | remote_fileio_mode_to_host (long mode, int open_call) | |
151 | { | |
152 | mode_t hmode = 0; | |
153 | ||
154 | if (!open_call) | |
155 | { | |
156 | if (mode & FILEIO_S_IFREG) | |
157 | hmode |= S_IFREG; | |
158 | if (mode & FILEIO_S_IFDIR) | |
159 | hmode |= S_IFDIR; | |
160 | if (mode & FILEIO_S_IFCHR) | |
161 | hmode |= S_IFCHR; | |
162 | } | |
163 | if (mode & FILEIO_S_IRUSR) | |
164 | hmode |= S_IRUSR; | |
165 | if (mode & FILEIO_S_IWUSR) | |
166 | hmode |= S_IWUSR; | |
167 | if (mode & FILEIO_S_IXUSR) | |
168 | hmode |= S_IXUSR; | |
9b265ec2 | 169 | #ifdef S_IRGRP |
449092f6 CV |
170 | if (mode & FILEIO_S_IRGRP) |
171 | hmode |= S_IRGRP; | |
9b265ec2 MM |
172 | #endif |
173 | #ifdef S_IWGRP | |
449092f6 CV |
174 | if (mode & FILEIO_S_IWGRP) |
175 | hmode |= S_IWGRP; | |
9b265ec2 MM |
176 | #endif |
177 | #ifdef S_IXGRP | |
449092f6 CV |
178 | if (mode & FILEIO_S_IXGRP) |
179 | hmode |= S_IXGRP; | |
9b265ec2 | 180 | #endif |
449092f6 CV |
181 | if (mode & FILEIO_S_IROTH) |
182 | hmode |= S_IROTH; | |
9b265ec2 | 183 | #ifdef S_IWOTH |
449092f6 CV |
184 | if (mode & FILEIO_S_IWOTH) |
185 | hmode |= S_IWOTH; | |
9b265ec2 MM |
186 | #endif |
187 | #ifdef S_IXOTH | |
449092f6 CV |
188 | if (mode & FILEIO_S_IXOTH) |
189 | hmode |= S_IXOTH; | |
9b265ec2 | 190 | #endif |
449092f6 CV |
191 | return hmode; |
192 | } | |
193 | ||
449092f6 CV |
194 | static int |
195 | remote_fileio_seek_flag_to_host (long num, int *flag) | |
196 | { | |
197 | if (!flag) | |
198 | return 0; | |
199 | switch (num) | |
200 | { | |
201 | case FILEIO_SEEK_SET: | |
202 | *flag = SEEK_SET; | |
203 | break; | |
204 | case FILEIO_SEEK_CUR: | |
205 | *flag = SEEK_CUR; | |
206 | break; | |
207 | case FILEIO_SEEK_END: | |
208 | *flag = SEEK_END; | |
209 | break; | |
210 | default: | |
211 | return -1; | |
212 | } | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static int | |
cbcdb1f5 | 217 | remote_fileio_extract_long (char **buf, LONGEST *retlong) |
449092f6 CV |
218 | { |
219 | char *c; | |
220 | int sign = 1; | |
221 | ||
222 | if (!buf || !*buf || !**buf || !retlong) | |
223 | return -1; | |
224 | c = strchr (*buf, ','); | |
225 | if (c) | |
226 | *c++ = '\0'; | |
227 | else | |
228 | c = strchr (*buf, '\0'); | |
229 | while (strchr ("+-", **buf)) | |
230 | { | |
231 | if (**buf == '-') | |
232 | sign = -sign; | |
233 | ++*buf; | |
234 | } | |
235 | for (*retlong = 0; **buf; ++*buf) | |
236 | { | |
237 | *retlong <<= 4; | |
238 | if (**buf >= '0' && **buf <= '9') | |
239 | *retlong += **buf - '0'; | |
240 | else if (**buf >= 'a' && **buf <= 'f') | |
241 | *retlong += **buf - 'a' + 10; | |
242 | else if (**buf >= 'A' && **buf <= 'F') | |
243 | *retlong += **buf - 'A' + 10; | |
244 | else | |
245 | return -1; | |
246 | } | |
247 | *retlong *= sign; | |
248 | *buf = c; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static int | |
253 | remote_fileio_extract_int (char **buf, long *retint) | |
254 | { | |
255 | int ret; | |
cbcdb1f5 | 256 | LONGEST retlong; |
449092f6 CV |
257 | |
258 | if (!retint) | |
259 | return -1; | |
cbcdb1f5 CV |
260 | ret = remote_fileio_extract_long (buf, &retlong); |
261 | if (!ret) | |
449092f6 CV |
262 | *retint = (long) retlong; |
263 | return ret; | |
264 | } | |
265 | ||
266 | static int | |
267 | remote_fileio_extract_ptr_w_len (char **buf, CORE_ADDR *ptrval, int *length) | |
268 | { | |
269 | char *c; | |
cbcdb1f5 | 270 | LONGEST retlong; |
449092f6 CV |
271 | |
272 | if (!buf || !*buf || !**buf || !ptrval || !length) | |
273 | return -1; | |
274 | c = strchr (*buf, '/'); | |
275 | if (!c) | |
276 | return -1; | |
277 | *c++ = '\0'; | |
278 | if (remote_fileio_extract_long (buf, &retlong)) | |
279 | return -1; | |
280 | *ptrval = (CORE_ADDR) retlong; | |
281 | *buf = c; | |
282 | if (remote_fileio_extract_long (buf, &retlong)) | |
283 | return -1; | |
284 | *length = (int) retlong; | |
285 | return 0; | |
286 | } | |
287 | ||
449092f6 | 288 | static void |
cbcdb1f5 | 289 | remote_fileio_to_fio_long (LONGEST num, fio_long_t fnum) |
449092f6 | 290 | { |
7823a941 | 291 | host_to_bigendian (num, (char *) fnum, 8); |
449092f6 CV |
292 | } |
293 | ||
449092f6 CV |
294 | static void |
295 | remote_fileio_to_fio_timeval (struct timeval *tv, struct fio_timeval *ftv) | |
296 | { | |
7823a941 | 297 | host_to_fileio_time (tv->tv_sec, ftv->ftv_sec); |
449092f6 CV |
298 | remote_fileio_to_fio_long (tv->tv_usec, ftv->ftv_usec); |
299 | } | |
300 | ||
301 | static int remote_fio_ctrl_c_flag = 0; | |
449092f6 CV |
302 | |
303 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
304 | static struct sigaction remote_fio_sa; | |
305 | static struct sigaction remote_fio_osa; | |
306 | #else | |
307 | static void (*remote_fio_ofunc)(int); | |
308 | #endif | |
309 | ||
310 | static void | |
cbcdb1f5 | 311 | remote_fileio_sig_init (void) |
449092f6 CV |
312 | { |
313 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
314 | remote_fio_sa.sa_handler = SIG_IGN; | |
315 | sigemptyset (&remote_fio_sa.sa_mask); | |
316 | remote_fio_sa.sa_flags = 0; | |
317 | sigaction (SIGINT, &remote_fio_sa, &remote_fio_osa); | |
318 | #else | |
319 | remote_fio_ofunc = signal (SIGINT, SIG_IGN); | |
320 | #endif | |
321 | } | |
322 | ||
323 | static void | |
324 | remote_fileio_sig_set (void (*sigint_func)(int)) | |
325 | { | |
326 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
327 | remote_fio_sa.sa_handler = sigint_func; | |
328 | sigemptyset (&remote_fio_sa.sa_mask); | |
329 | remote_fio_sa.sa_flags = 0; | |
330 | sigaction (SIGINT, &remote_fio_sa, NULL); | |
331 | #else | |
332 | signal (SIGINT, sigint_func); | |
333 | #endif | |
334 | } | |
335 | ||
336 | static void | |
cbcdb1f5 | 337 | remote_fileio_sig_exit (void) |
449092f6 CV |
338 | { |
339 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
340 | sigaction (SIGINT, &remote_fio_osa, NULL); | |
341 | #else | |
342 | signal (SIGINT, remote_fio_ofunc); | |
343 | #endif | |
344 | } | |
345 | ||
346 | static void | |
347 | remote_fileio_ctrl_c_signal_handler (int signo) | |
348 | { | |
449092f6 | 349 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
acd5494d | 350 | remote_fio_ctrl_c_flag = 1; |
449092f6 CV |
351 | } |
352 | ||
353 | static void | |
354 | remote_fileio_reply (int retcode, int error) | |
355 | { | |
356 | char buf[32]; | |
357 | ||
358 | remote_fileio_sig_set (SIG_IGN); | |
359 | strcpy (buf, "F"); | |
360 | if (retcode < 0) | |
361 | { | |
362 | strcat (buf, "-"); | |
363 | retcode = -retcode; | |
364 | } | |
365 | sprintf (buf + strlen (buf), "%x", retcode); | |
366 | if (error || remote_fio_ctrl_c_flag) | |
367 | { | |
368 | if (error && remote_fio_ctrl_c_flag) | |
369 | error = FILEIO_EINTR; | |
370 | if (error < 0) | |
371 | { | |
372 | strcat (buf, "-"); | |
373 | error = -error; | |
374 | } | |
375 | sprintf (buf + strlen (buf), ",%x", error); | |
376 | if (remote_fio_ctrl_c_flag) | |
377 | strcat (buf, ",C"); | |
378 | } | |
acd5494d | 379 | remote_fio_ctrl_c_flag = 0; |
449092f6 CV |
380 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); |
381 | putpkt (buf); | |
382 | } | |
383 | ||
384 | static void | |
cbcdb1f5 | 385 | remote_fileio_ioerror (void) |
449092f6 CV |
386 | { |
387 | remote_fileio_reply (-1, FILEIO_EIO); | |
388 | } | |
389 | ||
390 | static void | |
cbcdb1f5 | 391 | remote_fileio_badfd (void) |
449092f6 CV |
392 | { |
393 | remote_fileio_reply (-1, FILEIO_EBADF); | |
394 | } | |
395 | ||
396 | static void | |
397 | remote_fileio_return_errno (int retcode) | |
398 | { | |
3e43a32a | 399 | remote_fileio_reply (retcode, retcode < 0 |
7823a941 | 400 | ? host_to_fileio_error (errno) : 0); |
449092f6 CV |
401 | } |
402 | ||
403 | static void | |
404 | remote_fileio_return_success (int retcode) | |
405 | { | |
406 | remote_fileio_reply (retcode, 0); | |
407 | } | |
408 | ||
449092f6 CV |
409 | static void |
410 | remote_fileio_func_open (char *buf) | |
411 | { | |
412 | CORE_ADDR ptrval; | |
f7605bc2 | 413 | int length; |
449092f6 CV |
414 | long num; |
415 | int flags, fd; | |
416 | mode_t mode; | |
417 | char *pathname; | |
418 | struct stat st; | |
419 | ||
0df8b418 | 420 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero. */ |
449092f6 CV |
421 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) |
422 | { | |
423 | remote_fileio_ioerror (); | |
424 | return; | |
425 | } | |
426 | /* 2. Parameter: open flags */ | |
427 | if (remote_fileio_extract_int (&buf, &num)) | |
428 | { | |
429 | remote_fileio_ioerror (); | |
430 | return; | |
431 | } | |
432 | flags = remote_fileio_oflags_to_host (num); | |
433 | /* 3. Parameter: open mode */ | |
434 | if (remote_fileio_extract_int (&buf, &num)) | |
435 | { | |
436 | remote_fileio_ioerror (); | |
437 | return; | |
438 | } | |
439 | mode = remote_fileio_mode_to_host (num, 1); | |
440 | ||
f7605bc2 | 441 | /* Request pathname. */ |
224c3ddb | 442 | pathname = (char *) alloca (length); |
f7605bc2 | 443 | if (target_read_memory (ptrval, (gdb_byte *) pathname, length) != 0) |
449092f6 CV |
444 | { |
445 | remote_fileio_ioerror (); | |
446 | return; | |
447 | } | |
448 | ||
449 | /* Check if pathname exists and is not a regular file or directory. If so, | |
450 | return an appropriate error code. Same for trying to open directories | |
0df8b418 | 451 | for writing. */ |
449092f6 CV |
452 | if (!stat (pathname, &st)) |
453 | { | |
454 | if (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) | |
455 | { | |
456 | remote_fileio_reply (-1, FILEIO_ENODEV); | |
457 | return; | |
458 | } | |
459 | if (S_ISDIR (st.st_mode) | |
460 | && ((flags & O_WRONLY) == O_WRONLY || (flags & O_RDWR) == O_RDWR)) | |
461 | { | |
462 | remote_fileio_reply (-1, FILEIO_EISDIR); | |
463 | return; | |
464 | } | |
465 | } | |
466 | ||
614c279d | 467 | fd = gdb_open_cloexec (pathname, flags, mode); |
449092f6 CV |
468 | if (fd < 0) |
469 | { | |
470 | remote_fileio_return_errno (-1); | |
471 | return; | |
472 | } | |
473 | ||
474 | fd = remote_fileio_fd_to_targetfd (fd); | |
475 | remote_fileio_return_success (fd); | |
476 | } | |
477 | ||
478 | static void | |
479 | remote_fileio_func_close (char *buf) | |
480 | { | |
481 | long num; | |
482 | int fd; | |
483 | ||
484 | /* Parameter: file descriptor */ | |
485 | if (remote_fileio_extract_int (&buf, &num)) | |
486 | { | |
487 | remote_fileio_ioerror (); | |
488 | return; | |
489 | } | |
cbcdb1f5 CV |
490 | fd = remote_fileio_map_fd ((int) num); |
491 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
492 | { |
493 | remote_fileio_badfd (); | |
494 | return; | |
495 | } | |
496 | ||
449092f6 CV |
497 | if (fd != FIO_FD_CONSOLE_IN && fd != FIO_FD_CONSOLE_OUT && close (fd)) |
498 | remote_fileio_return_errno (-1); | |
499 | remote_fileio_close_target_fd ((int) num); | |
500 | remote_fileio_return_success (0); | |
501 | } | |
502 | ||
503 | static void | |
504 | remote_fileio_func_read (char *buf) | |
505 | { | |
506 | long target_fd, num; | |
cbcdb1f5 | 507 | LONGEST lnum; |
449092f6 | 508 | CORE_ADDR ptrval; |
22e048c9 | 509 | int fd, ret; |
cfd77fa1 | 510 | gdb_byte *buffer; |
449092f6 CV |
511 | size_t length; |
512 | off_t old_offset, new_offset; | |
513 | ||
514 | /* 1. Parameter: file descriptor */ | |
515 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
516 | { | |
517 | remote_fileio_ioerror (); | |
518 | return; | |
519 | } | |
cbcdb1f5 CV |
520 | fd = remote_fileio_map_fd ((int) target_fd); |
521 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
522 | { |
523 | remote_fileio_badfd (); | |
524 | return; | |
525 | } | |
526 | /* 2. Parameter: buffer pointer */ | |
527 | if (remote_fileio_extract_long (&buf, &lnum)) | |
528 | { | |
529 | remote_fileio_ioerror (); | |
530 | return; | |
531 | } | |
532 | ptrval = (CORE_ADDR) lnum; | |
533 | /* 3. Parameter: buffer length */ | |
534 | if (remote_fileio_extract_int (&buf, &num)) | |
535 | { | |
536 | remote_fileio_ioerror (); | |
537 | return; | |
538 | } | |
539 | length = (size_t) num; | |
540 | ||
541 | switch (fd) | |
542 | { | |
543 | case FIO_FD_CONSOLE_OUT: | |
544 | remote_fileio_badfd (); | |
545 | return; | |
546 | case FIO_FD_CONSOLE_IN: | |
547 | { | |
548 | static char *remaining_buf = NULL; | |
549 | static int remaining_length = 0; | |
550 | ||
b86ab4ff | 551 | buffer = (gdb_byte *) xmalloc (16384); |
449092f6 CV |
552 | if (remaining_buf) |
553 | { | |
449092f6 CV |
554 | if (remaining_length > length) |
555 | { | |
556 | memcpy (buffer, remaining_buf, length); | |
557 | memmove (remaining_buf, remaining_buf + length, | |
558 | remaining_length - length); | |
559 | remaining_length -= length; | |
560 | ret = length; | |
561 | } | |
562 | else | |
563 | { | |
564 | memcpy (buffer, remaining_buf, remaining_length); | |
565 | xfree (remaining_buf); | |
566 | remaining_buf = NULL; | |
567 | ret = remaining_length; | |
568 | } | |
569 | } | |
570 | else | |
571 | { | |
b86ab4ff DJ |
572 | /* Windows (at least XP and Server 2003) has difficulty |
573 | with large reads from consoles. If a handle is | |
574 | backed by a real console device, overly large reads | |
575 | from the handle will fail and set errno == ENOMEM. | |
576 | On a Windows Server 2003 system where I tested, | |
577 | reading 26608 bytes from the console was OK, but | |
578 | anything above 26609 bytes would fail. The limit has | |
579 | been observed to vary on different systems. So, we | |
580 | limit this read to something smaller than that - by a | |
581 | safe margin, in case the limit depends on system | |
582 | resources or version. */ | |
583 | ret = ui_file_read (gdb_stdtargin, (char *) buffer, 16383); | |
449092f6 CV |
584 | if (ret > 0 && (size_t)ret > length) |
585 | { | |
586 | remaining_buf = (char *) xmalloc (ret - length); | |
587 | remaining_length = ret - length; | |
588 | memcpy (remaining_buf, buffer + length, remaining_length); | |
589 | ret = length; | |
590 | } | |
591 | } | |
592 | } | |
593 | break; | |
594 | default: | |
cfd77fa1 | 595 | buffer = (gdb_byte *) xmalloc (length); |
449092f6 CV |
596 | /* POSIX defines EINTR behaviour of read in a weird way. It's allowed |
597 | for read() to return -1 even if "some" bytes have been read. It | |
598 | has been corrected in SUSv2 but that doesn't help us much... | |
599 | Therefore a complete solution must check how many bytes have been | |
600 | read on EINTR to return a more reliable value to the target */ | |
601 | old_offset = lseek (fd, 0, SEEK_CUR); | |
449092f6 CV |
602 | ret = read (fd, buffer, length); |
603 | if (ret < 0 && errno == EINTR) | |
604 | { | |
605 | new_offset = lseek (fd, 0, SEEK_CUR); | |
606 | /* If some data has been read, return the number of bytes read. | |
0df8b418 | 607 | The Ctrl-C flag is set in remote_fileio_reply() anyway. */ |
449092f6 CV |
608 | if (old_offset != new_offset) |
609 | ret = new_offset - old_offset; | |
610 | } | |
611 | break; | |
612 | } | |
613 | ||
614 | if (ret > 0) | |
615 | { | |
f7605bc2 PA |
616 | errno = target_write_memory (ptrval, buffer, ret); |
617 | if (errno != 0) | |
618 | ret = -1; | |
449092f6 CV |
619 | } |
620 | ||
621 | if (ret < 0) | |
622 | remote_fileio_return_errno (-1); | |
623 | else | |
624 | remote_fileio_return_success (ret); | |
625 | ||
626 | xfree (buffer); | |
627 | } | |
628 | ||
629 | static void | |
630 | remote_fileio_func_write (char *buf) | |
631 | { | |
632 | long target_fd, num; | |
cbcdb1f5 | 633 | LONGEST lnum; |
449092f6 | 634 | CORE_ADDR ptrval; |
f7605bc2 | 635 | int fd, ret; |
cfd77fa1 | 636 | gdb_byte *buffer; |
449092f6 CV |
637 | size_t length; |
638 | ||
639 | /* 1. Parameter: file descriptor */ | |
640 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
641 | { | |
642 | remote_fileio_ioerror (); | |
643 | return; | |
644 | } | |
cbcdb1f5 CV |
645 | fd = remote_fileio_map_fd ((int) target_fd); |
646 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
647 | { |
648 | remote_fileio_badfd (); | |
649 | return; | |
650 | } | |
651 | /* 2. Parameter: buffer pointer */ | |
652 | if (remote_fileio_extract_long (&buf, &lnum)) | |
653 | { | |
654 | remote_fileio_ioerror (); | |
655 | return; | |
656 | } | |
657 | ptrval = (CORE_ADDR) lnum; | |
658 | /* 3. Parameter: buffer length */ | |
659 | if (remote_fileio_extract_int (&buf, &num)) | |
660 | { | |
661 | remote_fileio_ioerror (); | |
662 | return; | |
663 | } | |
664 | length = (size_t) num; | |
665 | ||
cfd77fa1 | 666 | buffer = (gdb_byte *) xmalloc (length); |
f7605bc2 | 667 | if (target_read_memory (ptrval, buffer, length) != 0) |
449092f6 CV |
668 | { |
669 | xfree (buffer); | |
670 | remote_fileio_ioerror (); | |
671 | return; | |
672 | } | |
673 | ||
449092f6 CV |
674 | switch (fd) |
675 | { | |
676 | case FIO_FD_CONSOLE_IN: | |
677 | remote_fileio_badfd (); | |
1ed489bd | 678 | xfree (buffer); |
449092f6 CV |
679 | return; |
680 | case FIO_FD_CONSOLE_OUT: | |
cfd77fa1 DJ |
681 | ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr, |
682 | (char *) buffer, length); | |
449092f6 CV |
683 | gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr); |
684 | ret = length; | |
685 | break; | |
686 | default: | |
687 | ret = write (fd, buffer, length); | |
688 | if (ret < 0 && errno == EACCES) | |
3e43a32a | 689 | errno = EBADF; /* Cygwin returns EACCESS when writing to a |
0df8b418 | 690 | R/O file. */ |
449092f6 CV |
691 | break; |
692 | } | |
693 | ||
694 | if (ret < 0) | |
695 | remote_fileio_return_errno (-1); | |
696 | else | |
697 | remote_fileio_return_success (ret); | |
698 | ||
699 | xfree (buffer); | |
700 | } | |
701 | ||
702 | static void | |
703 | remote_fileio_func_lseek (char *buf) | |
704 | { | |
705 | long num; | |
cbcdb1f5 | 706 | LONGEST lnum; |
449092f6 CV |
707 | int fd, flag; |
708 | off_t offset, ret; | |
709 | ||
710 | /* 1. Parameter: file descriptor */ | |
711 | if (remote_fileio_extract_int (&buf, &num)) | |
712 | { | |
713 | remote_fileio_ioerror (); | |
714 | return; | |
715 | } | |
cbcdb1f5 CV |
716 | fd = remote_fileio_map_fd ((int) num); |
717 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
718 | { |
719 | remote_fileio_badfd (); | |
720 | return; | |
721 | } | |
722 | else if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) | |
723 | { | |
724 | remote_fileio_reply (-1, FILEIO_ESPIPE); | |
725 | return; | |
726 | } | |
727 | ||
728 | /* 2. Parameter: offset */ | |
729 | if (remote_fileio_extract_long (&buf, &lnum)) | |
730 | { | |
731 | remote_fileio_ioerror (); | |
732 | return; | |
733 | } | |
734 | offset = (off_t) lnum; | |
735 | /* 3. Parameter: flag */ | |
736 | if (remote_fileio_extract_int (&buf, &num)) | |
737 | { | |
738 | remote_fileio_ioerror (); | |
739 | return; | |
740 | } | |
741 | if (remote_fileio_seek_flag_to_host (num, &flag)) | |
742 | { | |
743 | remote_fileio_reply (-1, FILEIO_EINVAL); | |
744 | return; | |
745 | } | |
746 | ||
449092f6 CV |
747 | ret = lseek (fd, offset, flag); |
748 | ||
749 | if (ret == (off_t) -1) | |
750 | remote_fileio_return_errno (-1); | |
751 | else | |
752 | remote_fileio_return_success (ret); | |
753 | } | |
754 | ||
755 | static void | |
756 | remote_fileio_func_rename (char *buf) | |
757 | { | |
86cc68a8 | 758 | CORE_ADDR old_ptr, new_ptr; |
f7605bc2 | 759 | int old_len, new_len; |
449092f6 CV |
760 | char *oldpath, *newpath; |
761 | int ret, of, nf; | |
762 | struct stat ost, nst; | |
763 | ||
764 | /* 1. Parameter: Ptr to oldpath / length incl. trailing zero */ | |
86cc68a8 | 765 | if (remote_fileio_extract_ptr_w_len (&buf, &old_ptr, &old_len)) |
449092f6 CV |
766 | { |
767 | remote_fileio_ioerror (); | |
768 | return; | |
769 | } | |
86cc68a8 NS |
770 | |
771 | /* 2. Parameter: Ptr to newpath / length incl. trailing zero */ | |
772 | if (remote_fileio_extract_ptr_w_len (&buf, &new_ptr, &new_len)) | |
449092f6 CV |
773 | { |
774 | remote_fileio_ioerror (); | |
775 | return; | |
776 | } | |
86cc68a8 NS |
777 | |
778 | /* Request oldpath using 'm' packet */ | |
224c3ddb | 779 | oldpath = (char *) alloca (old_len); |
f7605bc2 | 780 | if (target_read_memory (old_ptr, (gdb_byte *) oldpath, old_len) != 0) |
449092f6 CV |
781 | { |
782 | remote_fileio_ioerror (); | |
783 | return; | |
784 | } | |
86cc68a8 | 785 | |
449092f6 | 786 | /* Request newpath using 'm' packet */ |
224c3ddb | 787 | newpath = (char *) alloca (new_len); |
f7605bc2 | 788 | if (target_read_memory (new_ptr, (gdb_byte *) newpath, new_len) != 0) |
449092f6 CV |
789 | { |
790 | remote_fileio_ioerror (); | |
791 | return; | |
792 | } | |
793 | ||
0df8b418 | 794 | /* Only operate on regular files and directories. */ |
cbcdb1f5 CV |
795 | of = stat (oldpath, &ost); |
796 | nf = stat (newpath, &nst); | |
797 | if ((!of && !S_ISREG (ost.st_mode) && !S_ISDIR (ost.st_mode)) | |
798 | || (!nf && !S_ISREG (nst.st_mode) && !S_ISDIR (nst.st_mode))) | |
449092f6 CV |
799 | { |
800 | remote_fileio_reply (-1, FILEIO_EACCES); | |
801 | return; | |
802 | } | |
803 | ||
449092f6 CV |
804 | ret = rename (oldpath, newpath); |
805 | ||
806 | if (ret == -1) | |
807 | { | |
808 | /* Special case: newpath is a non-empty directory. Some systems | |
809 | return ENOTEMPTY, some return EEXIST. We coerce that to be | |
0df8b418 | 810 | always EEXIST. */ |
449092f6 CV |
811 | if (errno == ENOTEMPTY) |
812 | errno = EEXIST; | |
813 | #ifdef __CYGWIN__ | |
0df8b418 | 814 | /* Workaround some Cygwin problems with correct errnos. */ |
449092f6 CV |
815 | if (errno == EACCES) |
816 | { | |
817 | if (!of && !nf && S_ISDIR (nst.st_mode)) | |
818 | { | |
819 | if (S_ISREG (ost.st_mode)) | |
820 | errno = EISDIR; | |
821 | else | |
822 | { | |
d0d0ab16 CV |
823 | char oldfullpath[PATH_MAX]; |
824 | char newfullpath[PATH_MAX]; | |
449092f6 CV |
825 | int len; |
826 | ||
d0d0ab16 CV |
827 | cygwin_conv_path (CCP_WIN_A_TO_POSIX, oldpath, oldfullpath, |
828 | PATH_MAX); | |
829 | cygwin_conv_path (CCP_WIN_A_TO_POSIX, newpath, newfullpath, | |
830 | PATH_MAX); | |
449092f6 | 831 | len = strlen (oldfullpath); |
0ba1096a KT |
832 | if (IS_DIR_SEPARATOR (newfullpath[len]) |
833 | && !filename_ncmp (oldfullpath, newfullpath, len)) | |
449092f6 CV |
834 | errno = EINVAL; |
835 | else | |
836 | errno = EEXIST; | |
837 | } | |
838 | } | |
839 | } | |
840 | #endif | |
841 | ||
842 | remote_fileio_return_errno (-1); | |
843 | } | |
844 | else | |
845 | remote_fileio_return_success (ret); | |
846 | } | |
847 | ||
848 | static void | |
849 | remote_fileio_func_unlink (char *buf) | |
850 | { | |
851 | CORE_ADDR ptrval; | |
f7605bc2 | 852 | int length; |
449092f6 CV |
853 | char *pathname; |
854 | int ret; | |
855 | struct stat st; | |
856 | ||
857 | /* Parameter: Ptr to pathname / length incl. trailing zero */ | |
858 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
859 | { | |
860 | remote_fileio_ioerror (); | |
861 | return; | |
862 | } | |
863 | /* Request pathname using 'm' packet */ | |
224c3ddb | 864 | pathname = (char *) alloca (length); |
f7605bc2 | 865 | if (target_read_memory (ptrval, (gdb_byte *) pathname, length) != 0) |
449092f6 CV |
866 | { |
867 | remote_fileio_ioerror (); | |
868 | return; | |
869 | } | |
870 | ||
871 | /* Only operate on regular files (and directories, which allows to return | |
0df8b418 | 872 | the correct return code). */ |
449092f6 CV |
873 | if (!stat (pathname, &st) && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
874 | { | |
875 | remote_fileio_reply (-1, FILEIO_ENODEV); | |
876 | return; | |
877 | } | |
878 | ||
449092f6 CV |
879 | ret = unlink (pathname); |
880 | ||
881 | if (ret == -1) | |
882 | remote_fileio_return_errno (-1); | |
883 | else | |
884 | remote_fileio_return_success (ret); | |
885 | } | |
886 | ||
887 | static void | |
888 | remote_fileio_func_stat (char *buf) | |
889 | { | |
86cc68a8 | 890 | CORE_ADDR statptr, nameptr; |
f7605bc2 | 891 | int ret, namelength; |
449092f6 | 892 | char *pathname; |
cbcdb1f5 | 893 | LONGEST lnum; |
449092f6 CV |
894 | struct stat st; |
895 | struct fio_stat fst; | |
896 | ||
897 | /* 1. Parameter: Ptr to pathname / length incl. trailing zero */ | |
86cc68a8 | 898 | if (remote_fileio_extract_ptr_w_len (&buf, &nameptr, &namelength)) |
449092f6 CV |
899 | { |
900 | remote_fileio_ioerror (); | |
901 | return; | |
902 | } | |
86cc68a8 NS |
903 | |
904 | /* 2. Parameter: Ptr to struct stat */ | |
905 | if (remote_fileio_extract_long (&buf, &lnum)) | |
449092f6 CV |
906 | { |
907 | remote_fileio_ioerror (); | |
908 | return; | |
909 | } | |
86cc68a8 NS |
910 | statptr = (CORE_ADDR) lnum; |
911 | ||
912 | /* Request pathname using 'm' packet */ | |
224c3ddb | 913 | pathname = (char *) alloca (namelength); |
f7605bc2 | 914 | if (target_read_memory (nameptr, (gdb_byte *) pathname, namelength) != 0) |
449092f6 CV |
915 | { |
916 | remote_fileio_ioerror (); | |
917 | return; | |
918 | } | |
449092f6 | 919 | |
449092f6 CV |
920 | ret = stat (pathname, &st); |
921 | ||
922 | if (ret == -1) | |
923 | { | |
924 | remote_fileio_return_errno (-1); | |
925 | return; | |
926 | } | |
0df8b418 | 927 | /* Only operate on regular files and directories. */ |
449092f6 CV |
928 | if (!ret && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode)) |
929 | { | |
930 | remote_fileio_reply (-1, FILEIO_EACCES); | |
931 | return; | |
932 | } | |
86cc68a8 | 933 | if (statptr) |
449092f6 | 934 | { |
7823a941 GB |
935 | host_to_fileio_stat (&st, &fst); |
936 | host_to_fileio_uint (0, fst.fst_dev); | |
f7605bc2 PA |
937 | |
938 | errno = target_write_memory (statptr, (gdb_byte *) &fst, sizeof fst); | |
939 | if (errno != 0) | |
449092f6 CV |
940 | { |
941 | remote_fileio_return_errno (-1); | |
942 | return; | |
943 | } | |
944 | } | |
945 | remote_fileio_return_success (ret); | |
946 | } | |
947 | ||
948 | static void | |
949 | remote_fileio_func_fstat (char *buf) | |
950 | { | |
951 | CORE_ADDR ptrval; | |
22e048c9 | 952 | int fd, ret; |
449092f6 | 953 | long target_fd; |
cbcdb1f5 | 954 | LONGEST lnum; |
449092f6 CV |
955 | struct stat st; |
956 | struct fio_stat fst; | |
957 | struct timeval tv; | |
958 | ||
959 | /* 1. Parameter: file descriptor */ | |
960 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
961 | { | |
962 | remote_fileio_ioerror (); | |
963 | return; | |
964 | } | |
cbcdb1f5 CV |
965 | fd = remote_fileio_map_fd ((int) target_fd); |
966 | if (fd == FIO_FD_INVALID) | |
449092f6 CV |
967 | { |
968 | remote_fileio_badfd (); | |
969 | return; | |
970 | } | |
971 | /* 2. Parameter: Ptr to struct stat */ | |
972 | if (remote_fileio_extract_long (&buf, &lnum)) | |
973 | { | |
974 | remote_fileio_ioerror (); | |
975 | return; | |
976 | } | |
977 | ptrval = (CORE_ADDR) lnum; | |
978 | ||
449092f6 CV |
979 | if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT) |
980 | { | |
7823a941 | 981 | host_to_fileio_uint (1, fst.fst_dev); |
2e3fd767 | 982 | memset (&st, 0, sizeof (st)); |
449092f6 CV |
983 | st.st_mode = S_IFCHR | (fd == FIO_FD_CONSOLE_IN ? S_IRUSR : S_IWUSR); |
984 | st.st_nlink = 1; | |
d3ea6809 | 985 | #ifdef HAVE_GETUID |
449092f6 | 986 | st.st_uid = getuid (); |
d3ea6809 MM |
987 | #endif |
988 | #ifdef HAVE_GETGID | |
449092f6 | 989 | st.st_gid = getgid (); |
d3ea6809 | 990 | #endif |
d3ea6809 | 991 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
449092f6 | 992 | st.st_blksize = 512; |
d3ea6809 | 993 | #endif |
1dd727e9 | 994 | #if HAVE_STRUCT_STAT_ST_BLOCKS |
449092f6 | 995 | st.st_blocks = 0; |
1dd727e9 | 996 | #endif |
449092f6 CV |
997 | if (!gettimeofday (&tv, NULL)) |
998 | st.st_atime = st.st_mtime = st.st_ctime = tv.tv_sec; | |
999 | else | |
1000 | st.st_atime = st.st_mtime = st.st_ctime = (time_t) 0; | |
1001 | ret = 0; | |
1002 | } | |
1003 | else | |
1004 | ret = fstat (fd, &st); | |
1005 | ||
1006 | if (ret == -1) | |
1007 | { | |
1008 | remote_fileio_return_errno (-1); | |
1009 | return; | |
1010 | } | |
1011 | if (ptrval) | |
1012 | { | |
7823a941 | 1013 | host_to_fileio_stat (&st, &fst); |
449092f6 | 1014 | |
f7605bc2 PA |
1015 | errno = target_write_memory (ptrval, (gdb_byte *) &fst, sizeof fst); |
1016 | if (errno != 0) | |
449092f6 CV |
1017 | { |
1018 | remote_fileio_return_errno (-1); | |
1019 | return; | |
1020 | } | |
1021 | } | |
1022 | remote_fileio_return_success (ret); | |
1023 | } | |
1024 | ||
1025 | static void | |
1026 | remote_fileio_func_gettimeofday (char *buf) | |
1027 | { | |
cbcdb1f5 | 1028 | LONGEST lnum; |
449092f6 | 1029 | CORE_ADDR ptrval; |
22e048c9 | 1030 | int ret; |
449092f6 CV |
1031 | struct timeval tv; |
1032 | struct fio_timeval ftv; | |
1033 | ||
1034 | /* 1. Parameter: struct timeval pointer */ | |
1035 | if (remote_fileio_extract_long (&buf, &lnum)) | |
1036 | { | |
1037 | remote_fileio_ioerror (); | |
1038 | return; | |
1039 | } | |
1040 | ptrval = (CORE_ADDR) lnum; | |
0df8b418 | 1041 | /* 2. Parameter: some pointer value... */ |
449092f6 CV |
1042 | if (remote_fileio_extract_long (&buf, &lnum)) |
1043 | { | |
1044 | remote_fileio_ioerror (); | |
1045 | return; | |
1046 | } | |
0df8b418 | 1047 | /* ...which has to be NULL. */ |
449092f6 CV |
1048 | if (lnum) |
1049 | { | |
1050 | remote_fileio_reply (-1, FILEIO_EINVAL); | |
1051 | return; | |
1052 | } | |
1053 | ||
449092f6 CV |
1054 | ret = gettimeofday (&tv, NULL); |
1055 | ||
1056 | if (ret == -1) | |
1057 | { | |
1058 | remote_fileio_return_errno (-1); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | if (ptrval) | |
1063 | { | |
1064 | remote_fileio_to_fio_timeval (&tv, &ftv); | |
1065 | ||
f7605bc2 PA |
1066 | errno = target_write_memory (ptrval, (gdb_byte *) &ftv, sizeof ftv); |
1067 | if (errno != 0) | |
449092f6 CV |
1068 | { |
1069 | remote_fileio_return_errno (-1); | |
1070 | return; | |
1071 | } | |
1072 | } | |
1073 | remote_fileio_return_success (ret); | |
1074 | } | |
1075 | ||
1076 | static void | |
1077 | remote_fileio_func_isatty (char *buf) | |
1078 | { | |
1079 | long target_fd; | |
1080 | int fd; | |
1081 | ||
1082 | /* Parameter: file descriptor */ | |
1083 | if (remote_fileio_extract_int (&buf, &target_fd)) | |
1084 | { | |
1085 | remote_fileio_ioerror (); | |
1086 | return; | |
1087 | } | |
449092f6 CV |
1088 | fd = remote_fileio_map_fd ((int) target_fd); |
1089 | remote_fileio_return_success (fd == FIO_FD_CONSOLE_IN || | |
1090 | fd == FIO_FD_CONSOLE_OUT ? 1 : 0); | |
1091 | } | |
1092 | ||
1093 | static void | |
1094 | remote_fileio_func_system (char *buf) | |
1095 | { | |
1096 | CORE_ADDR ptrval; | |
22e048c9 | 1097 | int ret, length; |
5600ea19 | 1098 | char *cmdline = NULL; |
449092f6 CV |
1099 | |
1100 | /* Parameter: Ptr to commandline / length incl. trailing zero */ | |
1101 | if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length)) | |
1102 | { | |
1103 | remote_fileio_ioerror (); | |
1104 | return; | |
1105 | } | |
5600ea19 NS |
1106 | |
1107 | if (length) | |
449092f6 | 1108 | { |
5600ea19 | 1109 | /* Request commandline using 'm' packet */ |
224c3ddb | 1110 | cmdline = (char *) alloca (length); |
f7605bc2 | 1111 | if (target_read_memory (ptrval, (gdb_byte *) cmdline, length) != 0) |
5600ea19 NS |
1112 | { |
1113 | remote_fileio_ioerror (); | |
1114 | return; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* Check if system(3) has been explicitely allowed using the | |
1119 | `set remote system-call-allowed 1' command. If length is 0, | |
1120 | indicating a NULL parameter to the system call, return zero to | |
1121 | indicate a shell is not available. Otherwise fail with EPERM. */ | |
1122 | if (!remote_fio_system_call_allowed) | |
1123 | { | |
1124 | if (!length) | |
1125 | remote_fileio_return_success (0); | |
1126 | else | |
1127 | remote_fileio_reply (-1, FILEIO_EPERM); | |
449092f6 CV |
1128 | return; |
1129 | } | |
1130 | ||
449092f6 CV |
1131 | ret = system (cmdline); |
1132 | ||
5600ea19 NS |
1133 | if (!length) |
1134 | remote_fileio_return_success (ret); | |
1135 | else if (ret == -1) | |
449092f6 CV |
1136 | remote_fileio_return_errno (-1); |
1137 | else | |
1138 | remote_fileio_return_success (WEXITSTATUS (ret)); | |
1139 | } | |
1140 | ||
1141 | static struct { | |
1142 | char *name; | |
1143 | void (*func)(char *); | |
1144 | } remote_fio_func_map[] = { | |
d5d6fca5 DJ |
1145 | { "open", remote_fileio_func_open }, |
1146 | { "close", remote_fileio_func_close }, | |
1147 | { "read", remote_fileio_func_read }, | |
1148 | { "write", remote_fileio_func_write }, | |
1149 | { "lseek", remote_fileio_func_lseek }, | |
1150 | { "rename", remote_fileio_func_rename }, | |
1151 | { "unlink", remote_fileio_func_unlink }, | |
1152 | { "stat", remote_fileio_func_stat }, | |
1153 | { "fstat", remote_fileio_func_fstat }, | |
1154 | { "gettimeofday", remote_fileio_func_gettimeofday }, | |
1155 | { "isatty", remote_fileio_func_isatty }, | |
1156 | { "system", remote_fileio_func_system }, | |
1157 | { NULL, NULL } | |
449092f6 CV |
1158 | }; |
1159 | ||
1160 | static int | |
1161 | do_remote_fileio_request (struct ui_out *uiout, void *buf_arg) | |
1162 | { | |
19ba03f4 | 1163 | char *buf = (char *) buf_arg; |
449092f6 CV |
1164 | char *c; |
1165 | int idx; | |
1166 | ||
1167 | remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler); | |
1168 | ||
1169 | c = strchr (++buf, ','); | |
1170 | if (c) | |
1171 | *c++ = '\0'; | |
1172 | else | |
1173 | c = strchr (buf, '\0'); | |
1174 | for (idx = 0; remote_fio_func_map[idx].name; ++idx) | |
1175 | if (!strcmp (remote_fio_func_map[idx].name, buf)) | |
1176 | break; | |
0df8b418 | 1177 | if (!remote_fio_func_map[idx].name) /* ERROR: No such function. */ |
449092f6 CV |
1178 | return RETURN_ERROR; |
1179 | remote_fio_func_map[idx].func (c); | |
1180 | return 0; | |
1181 | } | |
1182 | ||
ad9a8f3f NS |
1183 | /* Close any open descriptors, and reinitialize the file mapping. */ |
1184 | ||
1185 | void | |
1186 | remote_fileio_reset (void) | |
1187 | { | |
1188 | int ix; | |
1189 | ||
1190 | for (ix = 0; ix != remote_fio_data.fd_map_size; ix++) | |
1191 | { | |
1192 | int fd = remote_fio_data.fd_map[ix]; | |
1193 | ||
1194 | if (fd >= 0) | |
1195 | close (fd); | |
1196 | } | |
1197 | if (remote_fio_data.fd_map) | |
1198 | { | |
6c761d9c | 1199 | xfree (remote_fio_data.fd_map); |
ad9a8f3f NS |
1200 | remote_fio_data.fd_map = NULL; |
1201 | remote_fio_data.fd_map_size = 0; | |
1202 | } | |
1203 | } | |
1204 | ||
0df8b418 MS |
1205 | /* Handle a file I/O request. BUF points to the packet containing the |
1206 | request. CTRLC_PENDING_P should be nonzero if the target has not | |
3a29589a DJ |
1207 | acknowledged the Ctrl-C sent asynchronously earlier. */ |
1208 | ||
449092f6 | 1209 | void |
3a29589a | 1210 | remote_fileio_request (char *buf, int ctrlc_pending_p) |
449092f6 CV |
1211 | { |
1212 | int ex; | |
1213 | ||
1214 | remote_fileio_sig_init (); | |
1215 | ||
3a29589a | 1216 | if (ctrlc_pending_p) |
449092f6 | 1217 | { |
3a29589a DJ |
1218 | /* If the target hasn't responded to the Ctrl-C sent |
1219 | asynchronously earlier, take this opportunity to send the | |
1220 | Ctrl-C synchronously. */ | |
1221 | remote_fio_ctrl_c_flag = 1; | |
3a29589a DJ |
1222 | remote_fileio_reply (-1, FILEIO_EINTR); |
1223 | } | |
1224 | else | |
1225 | { | |
1226 | remote_fio_ctrl_c_flag = 0; | |
3a29589a | 1227 | |
79a45e25 PA |
1228 | ex = catch_exceptions (current_uiout, |
1229 | do_remote_fileio_request, (void *)buf, | |
3a29589a DJ |
1230 | RETURN_MASK_ALL); |
1231 | switch (ex) | |
1232 | { | |
1233 | case RETURN_ERROR: | |
1234 | remote_fileio_reply (-1, FILEIO_ENOSYS); | |
1235 | break; | |
1236 | case RETURN_QUIT: | |
1237 | remote_fileio_reply (-1, FILEIO_EINTR); | |
1238 | break; | |
1239 | default: | |
1240 | break; | |
1241 | } | |
449092f6 CV |
1242 | } |
1243 | ||
1244 | remote_fileio_sig_exit (); | |
1245 | } | |
0a93529c GB |
1246 | \f |
1247 | ||
1248 | /* Unpack an fio_uint_t. */ | |
1249 | ||
1250 | static unsigned int | |
1251 | remote_fileio_to_host_uint (fio_uint_t fnum) | |
1252 | { | |
1253 | return extract_unsigned_integer ((gdb_byte *) fnum, 4, | |
1254 | BFD_ENDIAN_BIG); | |
1255 | } | |
1256 | ||
1257 | /* Unpack an fio_ulong_t. */ | |
1258 | ||
1259 | static ULONGEST | |
1260 | remote_fileio_to_host_ulong (fio_ulong_t fnum) | |
1261 | { | |
1262 | return extract_unsigned_integer ((gdb_byte *) fnum, 8, | |
1263 | BFD_ENDIAN_BIG); | |
1264 | } | |
1265 | ||
1266 | /* Unpack an fio_mode_t. */ | |
1267 | ||
1268 | static mode_t | |
1269 | remote_fileio_to_host_mode (fio_mode_t fnum) | |
1270 | { | |
1271 | return remote_fileio_mode_to_host (remote_fileio_to_host_uint (fnum), | |
1272 | 0); | |
1273 | } | |
1274 | ||
1275 | /* Unpack an fio_time_t. */ | |
1276 | ||
1277 | static time_t | |
1278 | remote_fileio_to_host_time (fio_time_t fnum) | |
1279 | { | |
1280 | return remote_fileio_to_host_uint (fnum); | |
1281 | } | |
1282 | ||
1283 | ||
1284 | /* See remote-fileio.h. */ | |
1285 | ||
1286 | void | |
1287 | remote_fileio_to_host_stat (struct fio_stat *fst, struct stat *st) | |
1288 | { | |
1289 | memset (st, 0, sizeof (struct stat)); | |
1290 | ||
1291 | st->st_dev = remote_fileio_to_host_uint (fst->fst_dev); | |
1292 | st->st_ino = remote_fileio_to_host_uint (fst->fst_ino); | |
1293 | st->st_mode = remote_fileio_to_host_mode (fst->fst_mode); | |
1294 | st->st_nlink = remote_fileio_to_host_uint (fst->fst_nlink); | |
1295 | st->st_uid = remote_fileio_to_host_uint (fst->fst_uid); | |
1296 | st->st_gid = remote_fileio_to_host_uint (fst->fst_gid); | |
1297 | st->st_rdev = remote_fileio_to_host_uint (fst->fst_rdev); | |
1298 | st->st_size = remote_fileio_to_host_ulong (fst->fst_size); | |
1299 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE | |
1300 | st->st_blksize = remote_fileio_to_host_ulong (fst->fst_blksize); | |
1301 | #endif | |
1302 | #if HAVE_STRUCT_STAT_ST_BLOCKS | |
1303 | st->st_blocks = remote_fileio_to_host_ulong (fst->fst_blocks); | |
1304 | #endif | |
1305 | st->st_atime = remote_fileio_to_host_time (fst->fst_atime); | |
1306 | st->st_mtime = remote_fileio_to_host_time (fst->fst_mtime); | |
1307 | st->st_ctime = remote_fileio_to_host_time (fst->fst_ctime); | |
1308 | } | |
1309 | \f | |
449092f6 CV |
1310 | |
1311 | static void | |
1312 | set_system_call_allowed (char *args, int from_tty) | |
1313 | { | |
1314 | if (args) | |
1315 | { | |
1316 | char *arg_end; | |
1317 | int val = strtoul (args, &arg_end, 10); | |
123f5f96 | 1318 | |
449092f6 CV |
1319 | if (*args && *arg_end == '\0') |
1320 | { | |
1321 | remote_fio_system_call_allowed = !!val; | |
1322 | return; | |
1323 | } | |
1324 | } | |
8a3fe4f8 | 1325 | error (_("Illegal argument for \"set remote system-call-allowed\" command")); |
449092f6 CV |
1326 | } |
1327 | ||
1328 | static void | |
1329 | show_system_call_allowed (char *args, int from_tty) | |
1330 | { | |
1331 | if (args) | |
3e43a32a MS |
1332 | error (_("Garbage after \"show remote " |
1333 | "system-call-allowed\" command: `%s'"), args); | |
449092f6 CV |
1334 | printf_unfiltered ("Calling host system(3) call from target is %sallowed\n", |
1335 | remote_fio_system_call_allowed ? "" : "not "); | |
1336 | } | |
1337 | ||
1338 | void | |
1339 | initialize_remote_fileio (struct cmd_list_element *remote_set_cmdlist, | |
1340 | struct cmd_list_element *remote_show_cmdlist) | |
1341 | { | |
1342 | add_cmd ("system-call-allowed", no_class, | |
1343 | set_system_call_allowed, | |
1a966eab | 1344 | _("Set if the host system(3) call is allowed for the target."), |
449092f6 CV |
1345 | &remote_set_cmdlist); |
1346 | add_cmd ("system-call-allowed", no_class, | |
1347 | show_system_call_allowed, | |
1a966eab | 1348 | _("Show if the host system(3) call is allowed for the target."), |
449092f6 CV |
1349 | &remote_show_cmdlist); |
1350 | } |