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e3c063ce | 1 | /* Copyright (C) 2002-2013 Free Software Foundation, Inc. |
6de9cd9a | 2 | Contributed by Andy Vaught |
10256cbe | 3 | F2003 I/O support contributed by Jerry DeLisle |
6de9cd9a | 4 | |
bb408e87 | 5 | This file is part of the GNU Fortran runtime library (libgfortran). |
6de9cd9a DN |
6 | |
7 | Libgfortran is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
748086b7 | 9 | the Free Software Foundation; either version 3, or (at your option) |
6de9cd9a DN |
10 | any later version. |
11 | ||
12 | Libgfortran 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 | ||
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
25 | |
26 | /* Unix stream I/O module */ | |
27 | ||
36ae8a61 | 28 | #include "io.h" |
92cbdb68 | 29 | #include "unix.h" |
6de9cd9a DN |
30 | #include <stdlib.h> |
31 | #include <limits.h> | |
32 | ||
33 | #include <unistd.h> | |
34 | #include <sys/stat.h> | |
35 | #include <fcntl.h> | |
59154ed2 | 36 | #include <assert.h> |
6de9cd9a | 37 | |
6de9cd9a DN |
38 | #include <string.h> |
39 | #include <errno.h> | |
40 | ||
fe046210 FXC |
41 | |
42 | /* For mingw, we don't identify files by their inode number, but by a | |
43 | 64-bit identifier created from a BY_HANDLE_FILE_INFORMATION. */ | |
c9828e78 | 44 | #ifdef __MINGW32__ |
fe046210 FXC |
45 | |
46 | #define WIN32_LEAN_AND_MEAN | |
47 | #include <windows.h> | |
48 | ||
99ebea03 TB |
49 | #if !defined(_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64 |
50 | #undef lseek | |
a4384bad | 51 | #define lseek _lseeki64 |
99ebea03 | 52 | #undef fstat |
c9828e78 | 53 | #define fstat _fstati64 |
99ebea03 | 54 | #undef stat |
c9828e78 | 55 | #define stat _stati64 |
99ebea03 | 56 | #endif |
a4384bad | 57 | |
c9828e78 | 58 | #ifndef HAVE_WORKING_STAT |
fe046210 FXC |
59 | static uint64_t |
60 | id_from_handle (HANDLE hFile) | |
61 | { | |
62 | BY_HANDLE_FILE_INFORMATION FileInformation; | |
63 | ||
64 | if (hFile == INVALID_HANDLE_VALUE) | |
65 | return 0; | |
66 | ||
67 | memset (&FileInformation, 0, sizeof(FileInformation)); | |
68 | if (!GetFileInformationByHandle (hFile, &FileInformation)) | |
69 | return 0; | |
70 | ||
71 | return ((uint64_t) FileInformation.nFileIndexLow) | |
72 | | (((uint64_t) FileInformation.nFileIndexHigh) << 32); | |
73 | } | |
74 | ||
75 | ||
76 | static uint64_t | |
77 | id_from_path (const char *path) | |
78 | { | |
79 | HANDLE hFile; | |
80 | uint64_t res; | |
81 | ||
82 | if (!path || !*path || access (path, F_OK)) | |
83 | return (uint64_t) -1; | |
84 | ||
85 | hFile = CreateFile (path, 0, 0, NULL, OPEN_EXISTING, | |
86 | FILE_FLAG_BACKUP_SEMANTICS | FILE_ATTRIBUTE_READONLY, | |
87 | NULL); | |
88 | res = id_from_handle (hFile); | |
89 | CloseHandle (hFile); | |
90 | return res; | |
91 | } | |
92 | ||
93 | ||
94 | static uint64_t | |
95 | id_from_fd (const int fd) | |
96 | { | |
97 | return id_from_handle ((HANDLE) _get_osfhandle (fd)); | |
98 | } | |
99 | ||
7ed26a67 TB |
100 | #endif /* HAVE_WORKING_STAT */ |
101 | #endif /* __MINGW32__ */ | |
102 | ||
103 | ||
104 | /* min macro that evaluates its arguments only once. */ | |
105 | #ifdef min | |
106 | #undef min | |
fe046210 | 107 | #endif |
7ed26a67 TB |
108 | |
109 | #define min(a,b) \ | |
110 | ({ typeof (a) _a = (a); \ | |
111 | typeof (b) _b = (b); \ | |
112 | _a < _b ? _a : _b; }) | |
c9828e78 | 113 | |
6de9cd9a DN |
114 | #ifndef PATH_MAX |
115 | #define PATH_MAX 1024 | |
116 | #endif | |
117 | ||
41724e6a AL |
118 | /* These flags aren't defined on all targets (mingw32), so provide them |
119 | here. */ | |
120 | #ifndef S_IRGRP | |
121 | #define S_IRGRP 0 | |
122 | #endif | |
123 | ||
124 | #ifndef S_IWGRP | |
125 | #define S_IWGRP 0 | |
126 | #endif | |
127 | ||
128 | #ifndef S_IROTH | |
129 | #define S_IROTH 0 | |
130 | #endif | |
131 | ||
132 | #ifndef S_IWOTH | |
133 | #define S_IWOTH 0 | |
134 | #endif | |
135 | ||
0dce3ca1 | 136 | |
47dad3ff JB |
137 | #ifndef HAVE_ACCESS |
138 | ||
139 | #ifndef W_OK | |
140 | #define W_OK 2 | |
141 | #endif | |
142 | ||
143 | #ifndef R_OK | |
144 | #define R_OK 4 | |
145 | #endif | |
146 | ||
147 | #ifndef F_OK | |
148 | #define F_OK 0 | |
149 | #endif | |
150 | ||
151 | /* Fallback implementation of access() on systems that don't have it. | |
152 | Only modes R_OK, W_OK and F_OK are used in this file. */ | |
153 | ||
154 | static int | |
155 | fallback_access (const char *path, int mode) | |
156 | { | |
fe230fcc FXC |
157 | int fd; |
158 | ||
159 | if ((mode & R_OK) && (fd = open (path, O_RDONLY)) < 0) | |
47dad3ff | 160 | return -1; |
fe230fcc | 161 | close (fd); |
47dad3ff | 162 | |
fe230fcc | 163 | if ((mode & W_OK) && (fd = open (path, O_WRONLY)) < 0) |
47dad3ff | 164 | return -1; |
fe230fcc | 165 | close (fd); |
47dad3ff JB |
166 | |
167 | if (mode == F_OK) | |
168 | { | |
99ebea03 | 169 | struct stat st; |
47dad3ff JB |
170 | return stat (path, &st); |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | #undef access | |
177 | #define access fallback_access | |
178 | #endif | |
179 | ||
180 | ||
68ee9c08 JB |
181 | /* Fallback directory for creating temporary files. P_tmpdir is |
182 | defined on many POSIX platforms. */ | |
183 | #ifndef P_tmpdir | |
184 | #ifdef _P_tmpdir | |
185 | #define P_tmpdir _P_tmpdir /* MinGW */ | |
186 | #else | |
187 | #define P_tmpdir "/tmp" | |
188 | #endif | |
189 | #endif | |
190 | ||
191 | ||
7812c78c | 192 | /* Unix and internal stream I/O module */ |
0dce3ca1 | 193 | |
7812c78c | 194 | static const int BUFFER_SIZE = 8192; |
0dce3ca1 | 195 | |
ce66b6f6 JB |
196 | typedef struct |
197 | { | |
198 | stream st; | |
199 | ||
200 | gfc_offset buffer_offset; /* File offset of the start of the buffer */ | |
201 | gfc_offset physical_offset; /* Current physical file offset */ | |
202 | gfc_offset logical_offset; /* Current logical file offset */ | |
7d5ee219 | 203 | gfc_offset file_length; /* Length of the file. */ |
ce66b6f6 JB |
204 | |
205 | char *buffer; /* Pointer to the buffer. */ | |
206 | int fd; /* The POSIX file descriptor. */ | |
207 | ||
208 | int active; /* Length of valid bytes in the buffer */ | |
209 | ||
210 | int ndirty; /* Dirty bytes starting at buffer_offset */ | |
211 | ||
7debf73d JB |
212 | /* Cached stat(2) values. */ |
213 | dev_t st_dev; | |
214 | ino_t st_ino; | |
c033f5ae JB |
215 | |
216 | bool unbuffered; /* Buffer should be flushed after each I/O statement. */ | |
ce66b6f6 JB |
217 | } |
218 | unix_stream; | |
219 | ||
220 | ||
6de9cd9a DN |
221 | /* fix_fd()-- Given a file descriptor, make sure it is not one of the |
222 | * standard descriptors, returning a non-standard descriptor. If the | |
223 | * user specifies that system errors should go to standard output, | |
224 | * then closes standard output, we don't want the system errors to a | |
225 | * file that has been given file descriptor 1 or 0. We want to send | |
226 | * the error to the invalid descriptor. */ | |
227 | ||
228 | static int | |
229 | fix_fd (int fd) | |
230 | { | |
2515e5a7 | 231 | #ifdef HAVE_DUP |
6de9cd9a DN |
232 | int input, output, error; |
233 | ||
234 | input = output = error = 0; | |
235 | ||
f21edfd6 RH |
236 | /* Unix allocates the lowest descriptors first, so a loop is not |
237 | required, but this order is. */ | |
6de9cd9a DN |
238 | if (fd == STDIN_FILENO) |
239 | { | |
240 | fd = dup (fd); | |
241 | input = 1; | |
242 | } | |
243 | if (fd == STDOUT_FILENO) | |
244 | { | |
245 | fd = dup (fd); | |
246 | output = 1; | |
247 | } | |
248 | if (fd == STDERR_FILENO) | |
249 | { | |
250 | fd = dup (fd); | |
251 | error = 1; | |
252 | } | |
253 | ||
254 | if (input) | |
255 | close (STDIN_FILENO); | |
256 | if (output) | |
257 | close (STDOUT_FILENO); | |
258 | if (error) | |
259 | close (STDERR_FILENO); | |
2515e5a7 | 260 | #endif |
6de9cd9a DN |
261 | |
262 | return fd; | |
263 | } | |
264 | ||
265 | ||
159840cb FXC |
266 | /* If the stream corresponds to a preconnected unit, we flush the |
267 | corresponding C stream. This is bugware for mixed C-Fortran codes | |
268 | where the C code doesn't flush I/O before returning. */ | |
269 | void | |
270 | flush_if_preconnected (stream * s) | |
271 | { | |
272 | int fd; | |
273 | ||
274 | fd = ((unix_stream *) s)->fd; | |
275 | if (fd == STDIN_FILENO) | |
276 | fflush (stdin); | |
277 | else if (fd == STDOUT_FILENO) | |
278 | fflush (stdout); | |
279 | else if (fd == STDERR_FILENO) | |
280 | fflush (stderr); | |
281 | } | |
282 | ||
6de9cd9a | 283 | |
7812c78c JD |
284 | /******************************************************************** |
285 | Raw I/O functions (read, write, seek, tell, truncate, close). | |
286 | ||
287 | These functions wrap the basic POSIX I/O syscalls. Any deviation in | |
288 | semantics is a bug, except the following: write restarts in case | |
289 | of being interrupted by a signal, and as the first argument the | |
290 | functions take the unix_stream struct rather than an integer file | |
291 | descriptor. Also, for POSIX read() and write() a nbyte argument larger | |
292 | than SSIZE_MAX is undefined; here the type of nbyte is ssize_t rather | |
293 | than size_t as for POSIX read/write. | |
294 | *********************************************************************/ | |
6de9cd9a | 295 | |
0dc43461 | 296 | static int |
7812c78c | 297 | raw_flush (unix_stream * s __attribute__ ((unused))) |
0dc43461 | 298 | { |
7812c78c | 299 | return 0; |
6de9cd9a DN |
300 | } |
301 | ||
7812c78c JD |
302 | static ssize_t |
303 | raw_read (unix_stream * s, void * buf, ssize_t nbyte) | |
304 | { | |
305 | /* For read we can't do I/O in a loop like raw_write does, because | |
306 | that will break applications that wait for interactive I/O. */ | |
307 | return read (s->fd, buf, nbyte); | |
308 | } | |
6de9cd9a | 309 | |
7812c78c JD |
310 | static ssize_t |
311 | raw_write (unix_stream * s, const void * buf, ssize_t nbyte) | |
6de9cd9a | 312 | { |
7812c78c | 313 | ssize_t trans, bytes_left; |
0dc43461 | 314 | char *buf_st; |
0dc43461 | 315 | |
7812c78c | 316 | bytes_left = nbyte; |
0dc43461 JB |
317 | buf_st = (char *) buf; |
318 | ||
319 | /* We must write in a loop since some systems don't restart system | |
320 | calls in case of a signal. */ | |
321 | while (bytes_left > 0) | |
6de9cd9a | 322 | { |
7812c78c | 323 | trans = write (s->fd, buf_st, bytes_left); |
0dc43461 JB |
324 | if (trans < 0) |
325 | { | |
326 | if (errno == EINTR) | |
327 | continue; | |
328 | else | |
7812c78c | 329 | return trans; |
0dc43461 JB |
330 | } |
331 | buf_st += trans; | |
332 | bytes_left -= trans; | |
6de9cd9a DN |
333 | } |
334 | ||
7812c78c | 335 | return nbyte - bytes_left; |
6de9cd9a | 336 | } |
6de9cd9a | 337 | |
a4384bad JB |
338 | static gfc_offset |
339 | raw_seek (unix_stream * s, gfc_offset offset, int whence) | |
7812c78c JD |
340 | { |
341 | return lseek (s->fd, offset, whence); | |
342 | } | |
6de9cd9a | 343 | |
a4384bad | 344 | static gfc_offset |
7812c78c JD |
345 | raw_tell (unix_stream * s) |
346 | { | |
68aab0e2 | 347 | return lseek (s->fd, 0, SEEK_CUR); |
7812c78c | 348 | } |
6de9cd9a | 349 | |
3469bd86 JB |
350 | static gfc_offset |
351 | raw_size (unix_stream * s) | |
352 | { | |
353 | struct stat statbuf; | |
354 | int ret = fstat (s->fd, &statbuf); | |
355 | if (ret == -1) | |
356 | return ret; | |
68aab0e2 JB |
357 | if (S_ISREG (statbuf.st_mode)) |
358 | return statbuf.st_size; | |
359 | else | |
360 | return 0; | |
3469bd86 JB |
361 | } |
362 | ||
7812c78c | 363 | static int |
a4384bad | 364 | raw_truncate (unix_stream * s, gfc_offset length) |
6de9cd9a | 365 | { |
a4384bad JB |
366 | #ifdef __MINGW32__ |
367 | HANDLE h; | |
368 | gfc_offset cur; | |
369 | ||
370 | if (isatty (s->fd)) | |
371 | { | |
372 | errno = EBADF; | |
373 | return -1; | |
374 | } | |
e7fc9c75 | 375 | h = (HANDLE) _get_osfhandle (s->fd); |
a4384bad JB |
376 | if (h == INVALID_HANDLE_VALUE) |
377 | { | |
378 | errno = EBADF; | |
379 | return -1; | |
380 | } | |
381 | cur = lseek (s->fd, 0, SEEK_CUR); | |
382 | if (cur == -1) | |
383 | return -1; | |
384 | if (lseek (s->fd, length, SEEK_SET) == -1) | |
385 | goto error; | |
386 | if (!SetEndOfFile (h)) | |
387 | { | |
388 | errno = EBADF; | |
389 | goto error; | |
390 | } | |
391 | if (lseek (s->fd, cur, SEEK_SET) == -1) | |
392 | return -1; | |
393 | return 0; | |
394 | error: | |
395 | lseek (s->fd, cur, SEEK_SET); | |
396 | return -1; | |
397 | #elif defined HAVE_FTRUNCATE | |
7812c78c JD |
398 | return ftruncate (s->fd, length); |
399 | #elif defined HAVE_CHSIZE | |
400 | return chsize (s->fd, length); | |
401 | #else | |
402 | runtime_error ("required ftruncate or chsize support not present"); | |
403 | return -1; | |
404 | #endif | |
6de9cd9a DN |
405 | } |
406 | ||
7812c78c JD |
407 | static int |
408 | raw_close (unix_stream * s) | |
409 | { | |
410 | int retval; | |
411 | ||
4197c13d L |
412 | if (s->fd != STDOUT_FILENO |
413 | && s->fd != STDERR_FILENO | |
414 | && s->fd != STDIN_FILENO) | |
415 | retval = close (s->fd); | |
416 | else | |
2ac7316d | 417 | retval = 0; |
bb408e87 | 418 | free (s); |
7812c78c JD |
419 | return retval; |
420 | } | |
6de9cd9a | 421 | |
33959d1d JB |
422 | static const struct stream_vtable raw_vtable = { |
423 | .read = (void *) raw_read, | |
424 | .write = (void *) raw_write, | |
425 | .seek = (void *) raw_seek, | |
426 | .tell = (void *) raw_tell, | |
427 | .size = (void *) raw_size, | |
428 | .trunc = (void *) raw_truncate, | |
429 | .close = (void *) raw_close, | |
430 | .flush = (void *) raw_flush | |
431 | }; | |
432 | ||
7812c78c JD |
433 | static int |
434 | raw_init (unix_stream * s) | |
435 | { | |
33959d1d | 436 | s->st.vptr = &raw_vtable; |
6de9cd9a | 437 | |
7812c78c JD |
438 | s->buffer = NULL; |
439 | return 0; | |
440 | } | |
0dc43461 | 441 | |
6de9cd9a | 442 | |
7812c78c JD |
443 | /********************************************************************* |
444 | Buffered I/O functions. These functions have the same semantics as the | |
445 | raw I/O functions above, except that they are buffered in order to | |
446 | improve performance. The buffer must be flushed when switching from | |
c033f5ae | 447 | reading to writing and vice versa. |
7812c78c JD |
448 | *********************************************************************/ |
449 | ||
450 | static int | |
451 | buf_flush (unix_stream * s) | |
6de9cd9a | 452 | { |
7812c78c JD |
453 | int writelen; |
454 | ||
455 | /* Flushing in read mode means discarding read bytes. */ | |
456 | s->active = 0; | |
0dc43461 | 457 | |
6de9cd9a | 458 | if (s->ndirty == 0) |
7812c78c | 459 | return 0; |
779f3975 | 460 | |
7d5ee219 | 461 | if (s->physical_offset != s->buffer_offset |
7812c78c JD |
462 | && lseek (s->fd, s->buffer_offset, SEEK_SET) < 0) |
463 | return -1; | |
6de9cd9a | 464 | |
7812c78c | 465 | writelen = raw_write (s, s->buffer, s->ndirty); |
6de9cd9a | 466 | |
7812c78c | 467 | s->physical_offset = s->buffer_offset + writelen; |
bf1df0a0 | 468 | |
7d5ee219 | 469 | if (s->physical_offset > s->file_length) |
7812c78c | 470 | s->file_length = s->physical_offset; |
0dc43461 JB |
471 | |
472 | s->ndirty -= writelen; | |
473 | if (s->ndirty != 0) | |
7812c78c | 474 | return -1; |
6de9cd9a | 475 | |
7812c78c | 476 | return 0; |
6de9cd9a DN |
477 | } |
478 | ||
7812c78c JD |
479 | static ssize_t |
480 | buf_read (unix_stream * s, void * buf, ssize_t nbyte) | |
6de9cd9a | 481 | { |
7812c78c JD |
482 | if (s->active == 0) |
483 | s->buffer_offset = s->logical_offset; | |
899583cb | 484 | |
7812c78c JD |
485 | /* Is the data we want in the buffer? */ |
486 | if (s->logical_offset + nbyte <= s->buffer_offset + s->active | |
487 | && s->buffer_offset <= s->logical_offset) | |
488 | memcpy (buf, s->buffer + (s->logical_offset - s->buffer_offset), nbyte); | |
899583cb JD |
489 | else |
490 | { | |
7812c78c JD |
491 | /* First copy the active bytes if applicable, then read the rest |
492 | either directly or filling the buffer. */ | |
493 | char *p; | |
494 | int nread = 0; | |
495 | ssize_t to_read, did_read; | |
496 | gfc_offset new_logical; | |
497 | ||
498 | p = (char *) buf; | |
499 | if (s->logical_offset >= s->buffer_offset | |
500 | && s->buffer_offset + s->active >= s->logical_offset) | |
501 | { | |
502 | nread = s->active - (s->logical_offset - s->buffer_offset); | |
503 | memcpy (buf, s->buffer + (s->logical_offset - s->buffer_offset), | |
504 | nread); | |
505 | p += nread; | |
506 | } | |
507 | /* At this point we consider all bytes in the buffer discarded. */ | |
508 | to_read = nbyte - nread; | |
509 | new_logical = s->logical_offset + nread; | |
7d5ee219 | 510 | if (s->physical_offset != new_logical |
7812c78c JD |
511 | && lseek (s->fd, new_logical, SEEK_SET) < 0) |
512 | return -1; | |
513 | s->buffer_offset = s->physical_offset = new_logical; | |
514 | if (to_read <= BUFFER_SIZE/2) | |
515 | { | |
516 | did_read = raw_read (s, s->buffer, BUFFER_SIZE); | |
517 | s->physical_offset += did_read; | |
518 | s->active = did_read; | |
519 | did_read = (did_read > to_read) ? to_read : did_read; | |
520 | memcpy (p, s->buffer, did_read); | |
521 | } | |
522 | else | |
523 | { | |
524 | did_read = raw_read (s, p, to_read); | |
525 | s->physical_offset += did_read; | |
526 | s->active = 0; | |
527 | } | |
528 | nbyte = did_read + nread; | |
6de9cd9a | 529 | } |
7812c78c JD |
530 | s->logical_offset += nbyte; |
531 | return nbyte; | |
6de9cd9a DN |
532 | } |
533 | ||
7812c78c JD |
534 | static ssize_t |
535 | buf_write (unix_stream * s, const void * buf, ssize_t nbyte) | |
6de9cd9a | 536 | { |
7812c78c JD |
537 | if (s->ndirty == 0) |
538 | s->buffer_offset = s->logical_offset; | |
539 | ||
540 | /* Does the data fit into the buffer? As a special case, if the | |
541 | buffer is empty and the request is bigger than BUFFER_SIZE/2, | |
542 | write directly. This avoids the case where the buffer would have | |
543 | to be flushed at every write. */ | |
544 | if (!(s->ndirty == 0 && nbyte > BUFFER_SIZE/2) | |
545 | && s->logical_offset + nbyte <= s->buffer_offset + BUFFER_SIZE | |
546 | && s->buffer_offset <= s->logical_offset | |
547 | && s->buffer_offset + s->ndirty >= s->logical_offset) | |
c1d70e1a | 548 | { |
7812c78c JD |
549 | memcpy (s->buffer + (s->logical_offset - s->buffer_offset), buf, nbyte); |
550 | int nd = (s->logical_offset - s->buffer_offset) + nbyte; | |
551 | if (nd > s->ndirty) | |
552 | s->ndirty = nd; | |
c1d70e1a TK |
553 | } |
554 | else | |
555 | { | |
7812c78c JD |
556 | /* Flush, and either fill the buffer with the new data, or if |
557 | the request is bigger than the buffer size, write directly | |
558 | bypassing the buffer. */ | |
559 | buf_flush (s); | |
560 | if (nbyte <= BUFFER_SIZE/2) | |
561 | { | |
562 | memcpy (s->buffer, buf, nbyte); | |
563 | s->buffer_offset = s->logical_offset; | |
564 | s->ndirty += nbyte; | |
565 | } | |
566 | else | |
10fa280a | 567 | { |
7d5ee219 | 568 | if (s->physical_offset != s->logical_offset) |
10fa280a TB |
569 | { |
570 | if (lseek (s->fd, s->logical_offset, SEEK_SET) < 0) | |
571 | return -1; | |
572 | s->physical_offset = s->logical_offset; | |
573 | } | |
574 | ||
575 | nbyte = raw_write (s, buf, nbyte); | |
576 | s->physical_offset += nbyte; | |
577 | } | |
6de9cd9a | 578 | } |
7812c78c | 579 | s->logical_offset += nbyte; |
7d5ee219 | 580 | if (s->logical_offset > s->file_length) |
7812c78c JD |
581 | s->file_length = s->logical_offset; |
582 | return nbyte; | |
6de9cd9a DN |
583 | } |
584 | ||
a4384bad JB |
585 | static gfc_offset |
586 | buf_seek (unix_stream * s, gfc_offset offset, int whence) | |
6de9cd9a | 587 | { |
7812c78c | 588 | switch (whence) |
779f3975 | 589 | { |
7812c78c JD |
590 | case SEEK_SET: |
591 | break; | |
592 | case SEEK_CUR: | |
593 | offset += s->logical_offset; | |
594 | break; | |
595 | case SEEK_END: | |
596 | offset += s->file_length; | |
597 | break; | |
598 | default: | |
599 | return -1; | |
779f3975 | 600 | } |
7812c78c | 601 | if (offset < 0) |
802fc826 | 602 | { |
7812c78c JD |
603 | errno = EINVAL; |
604 | return -1; | |
802fc826 | 605 | } |
7812c78c JD |
606 | s->logical_offset = offset; |
607 | return offset; | |
6de9cd9a DN |
608 | } |
609 | ||
a4384bad | 610 | static gfc_offset |
7812c78c | 611 | buf_tell (unix_stream * s) |
82b8244c | 612 | { |
09ad57ec | 613 | return buf_seek (s, 0, SEEK_CUR); |
82b8244c | 614 | } |
0dc43461 | 615 | |
3469bd86 JB |
616 | static gfc_offset |
617 | buf_size (unix_stream * s) | |
618 | { | |
619 | return s->file_length; | |
620 | } | |
621 | ||
0dc43461 | 622 | static int |
a4384bad | 623 | buf_truncate (unix_stream * s, gfc_offset length) |
0dc43461 | 624 | { |
7812c78c | 625 | int r; |
0dc43461 | 626 | |
7812c78c JD |
627 | if (buf_flush (s) != 0) |
628 | return -1; | |
629 | r = raw_truncate (s, length); | |
630 | if (r == 0) | |
631 | s->file_length = length; | |
632 | return r; | |
0dc43461 JB |
633 | } |
634 | ||
0dc43461 | 635 | static int |
7812c78c | 636 | buf_close (unix_stream * s) |
6de9cd9a | 637 | { |
7812c78c JD |
638 | if (buf_flush (s) != 0) |
639 | return -1; | |
bb408e87 | 640 | free (s->buffer); |
7812c78c | 641 | return raw_close (s); |
6de9cd9a DN |
642 | } |
643 | ||
33959d1d JB |
644 | static const struct stream_vtable buf_vtable = { |
645 | .read = (void *) buf_read, | |
646 | .write = (void *) buf_write, | |
647 | .seek = (void *) buf_seek, | |
648 | .tell = (void *) buf_tell, | |
649 | .size = (void *) buf_size, | |
650 | .trunc = (void *) buf_truncate, | |
651 | .close = (void *) buf_close, | |
652 | .flush = (void *) buf_flush | |
653 | }; | |
654 | ||
7812c78c JD |
655 | static int |
656 | buf_init (unix_stream * s) | |
6de9cd9a | 657 | { |
33959d1d | 658 | s->st.vptr = &buf_vtable; |
6de9cd9a | 659 | |
1a0fd3d3 | 660 | s->buffer = xmalloc (BUFFER_SIZE); |
7812c78c | 661 | return 0; |
6de9cd9a DN |
662 | } |
663 | ||
664 | ||
6de9cd9a DN |
665 | /********************************************************************* |
666 | memory stream functions - These are used for internal files | |
667 | ||
668 | The idea here is that a single stream structure is created and all | |
669 | requests must be satisfied from it. The location and size of the | |
670 | buffer is the character variable supplied to the READ or WRITE | |
671 | statement. | |
672 | ||
673 | *********************************************************************/ | |
674 | ||
7812c78c JD |
675 | char * |
676 | mem_alloc_r (stream * strm, int * len) | |
6de9cd9a | 677 | { |
7812c78c | 678 | unix_stream * s = (unix_stream *) strm; |
81f4be3c | 679 | gfc_offset n; |
15877a88 | 680 | gfc_offset where = s->logical_offset; |
6de9cd9a DN |
681 | |
682 | if (where < s->buffer_offset || where > s->buffer_offset + s->active) | |
683 | return NULL; | |
684 | ||
bd72d66c | 685 | n = s->buffer_offset + s->active - where; |
6de9cd9a DN |
686 | if (*len > n) |
687 | *len = n; | |
688 | ||
7812c78c JD |
689 | s->logical_offset = where + *len; |
690 | ||
6de9cd9a DN |
691 | return s->buffer + (where - s->buffer_offset); |
692 | } | |
693 | ||
694 | ||
c7421e06 JD |
695 | char * |
696 | mem_alloc_r4 (stream * strm, int * len) | |
697 | { | |
698 | unix_stream * s = (unix_stream *) strm; | |
699 | gfc_offset n; | |
700 | gfc_offset where = s->logical_offset; | |
701 | ||
702 | if (where < s->buffer_offset || where > s->buffer_offset + s->active) | |
703 | return NULL; | |
704 | ||
705 | n = s->buffer_offset + s->active - where; | |
706 | if (*len > n) | |
707 | *len = n; | |
708 | ||
709 | s->logical_offset = where + *len; | |
710 | ||
711 | return s->buffer + (where - s->buffer_offset) * 4; | |
712 | } | |
713 | ||
714 | ||
7812c78c JD |
715 | char * |
716 | mem_alloc_w (stream * strm, int * len) | |
6de9cd9a | 717 | { |
7812c78c | 718 | unix_stream * s = (unix_stream *) strm; |
81f4be3c | 719 | gfc_offset m; |
15877a88 | 720 | gfc_offset where = s->logical_offset; |
6de9cd9a | 721 | |
6de9cd9a DN |
722 | m = where + *len; |
723 | ||
59154ed2 | 724 | if (where < s->buffer_offset) |
6de9cd9a DN |
725 | return NULL; |
726 | ||
59154ed2 | 727 | if (m > s->file_length) |
aed6ee24 | 728 | return NULL; |
59154ed2 | 729 | |
6de9cd9a DN |
730 | s->logical_offset = m; |
731 | ||
732 | return s->buffer + (where - s->buffer_offset); | |
733 | } | |
734 | ||
735 | ||
746e6327 | 736 | gfc_char4_t * |
c7421e06 JD |
737 | mem_alloc_w4 (stream * strm, int * len) |
738 | { | |
739 | unix_stream * s = (unix_stream *) strm; | |
740 | gfc_offset m; | |
741 | gfc_offset where = s->logical_offset; | |
746e6327 | 742 | gfc_char4_t *result = (gfc_char4_t *) s->buffer; |
c7421e06 JD |
743 | |
744 | m = where + *len; | |
745 | ||
746 | if (where < s->buffer_offset) | |
747 | return NULL; | |
748 | ||
749 | if (m > s->file_length) | |
750 | return NULL; | |
751 | ||
752 | s->logical_offset = m; | |
746e6327 | 753 | return &result[where - s->buffer_offset]; |
c7421e06 JD |
754 | } |
755 | ||
756 | ||
79617d7e | 757 | /* Stream read function for character(kind=1) internal units. */ |
0dc43461 | 758 | |
7812c78c JD |
759 | static ssize_t |
760 | mem_read (stream * s, void * buf, ssize_t nbytes) | |
0dc43461 JB |
761 | { |
762 | void *p; | |
7812c78c | 763 | int nb = nbytes; |
0dc43461 | 764 | |
7812c78c | 765 | p = mem_alloc_r (s, &nb); |
0dc43461 JB |
766 | if (p) |
767 | { | |
7812c78c JD |
768 | memcpy (buf, p, nb); |
769 | return (ssize_t) nb; | |
0dc43461 JB |
770 | } |
771 | else | |
7812c78c | 772 | return 0; |
0dc43461 JB |
773 | } |
774 | ||
775 | ||
c7421e06 JD |
776 | /* Stream read function for chracter(kind=4) internal units. */ |
777 | ||
778 | static ssize_t | |
779 | mem_read4 (stream * s, void * buf, ssize_t nbytes) | |
780 | { | |
781 | void *p; | |
782 | int nb = nbytes; | |
783 | ||
784 | p = mem_alloc_r (s, &nb); | |
785 | if (p) | |
786 | { | |
787 | memcpy (buf, p, nb); | |
788 | return (ssize_t) nb; | |
789 | } | |
790 | else | |
791 | return 0; | |
792 | } | |
793 | ||
794 | ||
795 | /* Stream write function for character(kind=1) internal units. */ | |
0dc43461 | 796 | |
7812c78c JD |
797 | static ssize_t |
798 | mem_write (stream * s, const void * buf, ssize_t nbytes) | |
0dc43461 JB |
799 | { |
800 | void *p; | |
7812c78c | 801 | int nb = nbytes; |
0dc43461 | 802 | |
7812c78c | 803 | p = mem_alloc_w (s, &nb); |
0dc43461 JB |
804 | if (p) |
805 | { | |
7812c78c JD |
806 | memcpy (p, buf, nb); |
807 | return (ssize_t) nb; | |
0dc43461 JB |
808 | } |
809 | else | |
7812c78c | 810 | return 0; |
0dc43461 JB |
811 | } |
812 | ||
813 | ||
c7421e06 JD |
814 | /* Stream write function for character(kind=4) internal units. */ |
815 | ||
816 | static ssize_t | |
817 | mem_write4 (stream * s, const void * buf, ssize_t nwords) | |
818 | { | |
819 | gfc_char4_t *p; | |
820 | int nw = nwords; | |
821 | ||
746e6327 | 822 | p = mem_alloc_w4 (s, &nw); |
c7421e06 JD |
823 | if (p) |
824 | { | |
825 | while (nw--) | |
826 | *p++ = (gfc_char4_t) *((char *) buf); | |
827 | return nwords; | |
828 | } | |
829 | else | |
830 | return 0; | |
831 | } | |
832 | ||
833 | ||
a4384bad JB |
834 | static gfc_offset |
835 | mem_seek (stream * strm, gfc_offset offset, int whence) | |
6de9cd9a | 836 | { |
7812c78c JD |
837 | unix_stream * s = (unix_stream *) strm; |
838 | switch (whence) | |
839 | { | |
840 | case SEEK_SET: | |
841 | break; | |
842 | case SEEK_CUR: | |
843 | offset += s->logical_offset; | |
844 | break; | |
845 | case SEEK_END: | |
846 | offset += s->file_length; | |
847 | break; | |
848 | default: | |
849 | return -1; | |
850 | } | |
851 | ||
852 | /* Note that for internal array I/O it's actually possible to have a | |
853 | negative offset, so don't check for that. */ | |
6de9cd9a DN |
854 | if (offset > s->file_length) |
855 | { | |
7812c78c JD |
856 | errno = EINVAL; |
857 | return -1; | |
6de9cd9a DN |
858 | } |
859 | ||
860 | s->logical_offset = offset; | |
7812c78c JD |
861 | |
862 | /* Returning < 0 is the error indicator for sseek(), so return 0 if | |
863 | offset is negative. Thus if the return value is 0, the caller | |
864 | has to use stell() to get the real value of logical_offset. */ | |
865 | if (offset >= 0) | |
866 | return offset; | |
867 | return 0; | |
6de9cd9a DN |
868 | } |
869 | ||
870 | ||
a4384bad | 871 | static gfc_offset |
7812c78c | 872 | mem_tell (stream * s) |
82b8244c | 873 | { |
7812c78c | 874 | return ((unix_stream *)s)->logical_offset; |
82b8244c JB |
875 | } |
876 | ||
877 | ||
6de9cd9a | 878 | static int |
7812c78c | 879 | mem_truncate (unix_stream * s __attribute__ ((unused)), |
a4384bad | 880 | gfc_offset length __attribute__ ((unused))) |
6de9cd9a | 881 | { |
7812c78c | 882 | return 0; |
6de9cd9a DN |
883 | } |
884 | ||
885 | ||
7812c78c JD |
886 | static int |
887 | mem_flush (unix_stream * s __attribute__ ((unused))) | |
6de9cd9a | 888 | { |
7812c78c | 889 | return 0; |
6de9cd9a DN |
890 | } |
891 | ||
892 | ||
7812c78c JD |
893 | static int |
894 | mem_close (unix_stream * s) | |
6de9cd9a | 895 | { |
04695783 | 896 | free (s); |
6de9cd9a | 897 | |
7812c78c JD |
898 | return 0; |
899 | } | |
6de9cd9a | 900 | |
33959d1d JB |
901 | static const struct stream_vtable mem_vtable = { |
902 | .read = (void *) mem_read, | |
903 | .write = (void *) mem_write, | |
904 | .seek = (void *) mem_seek, | |
905 | .tell = (void *) mem_tell, | |
906 | /* buf_size is not a typo, we just reuse an identical | |
907 | implementation. */ | |
908 | .size = (void *) buf_size, | |
909 | .trunc = (void *) mem_truncate, | |
910 | .close = (void *) mem_close, | |
911 | .flush = (void *) mem_flush | |
912 | }; | |
913 | ||
914 | static const struct stream_vtable mem4_vtable = { | |
915 | .read = (void *) mem_read4, | |
916 | .write = (void *) mem_write4, | |
917 | .seek = (void *) mem_seek, | |
918 | .tell = (void *) mem_tell, | |
919 | /* buf_size is not a typo, we just reuse an identical | |
920 | implementation. */ | |
921 | .size = (void *) buf_size, | |
922 | .trunc = (void *) mem_truncate, | |
923 | .close = (void *) mem_close, | |
924 | .flush = (void *) mem_flush | |
925 | }; | |
6de9cd9a DN |
926 | |
927 | /********************************************************************* | |
928 | Public functions -- A reimplementation of this module needs to | |
929 | define functional equivalents of the following. | |
930 | *********************************************************************/ | |
931 | ||
c7421e06 JD |
932 | /* open_internal()-- Returns a stream structure from a character(kind=1) |
933 | internal file */ | |
6de9cd9a DN |
934 | |
935 | stream * | |
9370b3c0 | 936 | open_internal (char *base, int length, gfc_offset offset) |
6de9cd9a | 937 | { |
7812c78c | 938 | unix_stream *s; |
6de9cd9a | 939 | |
f4471acb | 940 | s = xcalloc (1, sizeof (unix_stream)); |
6de9cd9a DN |
941 | |
942 | s->buffer = base; | |
9370b3c0 | 943 | s->buffer_offset = offset; |
6de9cd9a | 944 | |
6de9cd9a DN |
945 | s->active = s->file_length = length; |
946 | ||
33959d1d | 947 | s->st.vptr = &mem_vtable; |
6de9cd9a | 948 | |
c7421e06 JD |
949 | return (stream *) s; |
950 | } | |
951 | ||
952 | /* open_internal4()-- Returns a stream structure from a character(kind=4) | |
953 | internal file */ | |
954 | ||
955 | stream * | |
956 | open_internal4 (char *base, int length, gfc_offset offset) | |
957 | { | |
958 | unix_stream *s; | |
959 | ||
f4471acb | 960 | s = xcalloc (1, sizeof (unix_stream)); |
c7421e06 JD |
961 | |
962 | s->buffer = base; | |
963 | s->buffer_offset = offset; | |
964 | ||
7c0de753 | 965 | s->active = s->file_length = length * sizeof (gfc_char4_t); |
c7421e06 | 966 | |
33959d1d | 967 | s->st.vptr = &mem4_vtable; |
c7421e06 | 968 | |
6de9cd9a DN |
969 | return (stream *) s; |
970 | } | |
971 | ||
972 | ||
c033f5ae JB |
973 | /* "Unbuffered" really means I/O statement buffering. For formatted |
974 | I/O, the fbuf manages this, and then uses raw I/O. For unformatted | |
975 | I/O, buffered I/O is used, and the buffer is flushed at the end of | |
976 | each I/O statement, where this function is called. */ | |
977 | ||
978 | int | |
979 | flush_if_unbuffered (stream* s) | |
980 | { | |
981 | unix_stream* us = (unix_stream*) s; | |
982 | if (us->unbuffered) | |
983 | return sflush (s); | |
984 | return 0; | |
985 | } | |
986 | ||
987 | ||
6de9cd9a DN |
988 | /* fd_to_stream()-- Given an open file descriptor, build a stream |
989 | * around it. */ | |
990 | ||
991 | static stream * | |
c033f5ae | 992 | fd_to_stream (int fd, bool unformatted) |
6de9cd9a | 993 | { |
99ebea03 | 994 | struct stat statbuf; |
6de9cd9a DN |
995 | unix_stream *s; |
996 | ||
f4471acb | 997 | s = xcalloc (1, sizeof (unix_stream)); |
6de9cd9a DN |
998 | |
999 | s->fd = fd; | |
6de9cd9a DN |
1000 | |
1001 | /* Get the current length of the file. */ | |
1002 | ||
1003 | fstat (fd, &statbuf); | |
779f3975 | 1004 | |
7debf73d JB |
1005 | s->st_dev = statbuf.st_dev; |
1006 | s->st_ino = statbuf.st_ino; | |
7d5ee219 JB |
1007 | s->file_length = statbuf.st_size; |
1008 | ||
1009 | /* Only use buffered IO for regular files. */ | |
1010 | if (S_ISREG (statbuf.st_mode) | |
1011 | && !options.all_unbuffered | |
1012 | && !(options.unbuffered_preconnected && | |
1013 | (s->fd == STDIN_FILENO | |
1014 | || s->fd == STDOUT_FILENO | |
1015 | || s->fd == STDERR_FILENO))) | |
1016 | buf_init (s); | |
5ea0705a | 1017 | else |
c033f5ae JB |
1018 | { |
1019 | if (unformatted) | |
1020 | { | |
1021 | s->unbuffered = true; | |
1022 | buf_init (s); | |
1023 | } | |
1024 | else | |
1025 | raw_init (s); | |
1026 | } | |
6de9cd9a DN |
1027 | |
1028 | return (stream *) s; | |
1029 | } | |
1030 | ||
1031 | ||
df65f093 SK |
1032 | /* Given the Fortran unit number, convert it to a C file descriptor. */ |
1033 | ||
1034 | int | |
5e805e44 | 1035 | unit_to_fd (int unit) |
df65f093 | 1036 | { |
df65f093 | 1037 | gfc_unit *us; |
5e805e44 | 1038 | int fd; |
df65f093 | 1039 | |
5e805e44 | 1040 | us = find_unit (unit); |
df65f093 SK |
1041 | if (us == NULL) |
1042 | return -1; | |
1043 | ||
5e805e44 JJ |
1044 | fd = ((unix_stream *) us->s)->fd; |
1045 | unlock_unit (us); | |
1046 | return fd; | |
df65f093 SK |
1047 | } |
1048 | ||
1049 | ||
6de9cd9a DN |
1050 | /* unpack_filename()-- Given a fortran string and a pointer to a |
1051 | * buffer that is PATH_MAX characters, convert the fortran string to a | |
1052 | * C string in the buffer. Returns nonzero if this is not possible. */ | |
1053 | ||
10c682a0 | 1054 | int |
6de9cd9a DN |
1055 | unpack_filename (char *cstring, const char *fstring, int len) |
1056 | { | |
050d1a59 | 1057 | if (fstring == NULL) |
1e030602 | 1058 | return EFAULT; |
6de9cd9a DN |
1059 | len = fstrlen (fstring, len); |
1060 | if (len >= PATH_MAX) | |
1e030602 | 1061 | return ENAMETOOLONG; |
6de9cd9a DN |
1062 | |
1063 | memmove (cstring, fstring, len); | |
1064 | cstring[len] = '\0'; | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | ||
68ee9c08 JB |
1070 | /* Helper function for tempfile(). Tries to open a temporary file in |
1071 | the directory specified by tempdir. If successful, the file name is | |
1072 | stored in fname and the descriptor returned. Returns -1 on | |
1073 | failure. */ | |
6de9cd9a DN |
1074 | |
1075 | static int | |
68ee9c08 | 1076 | tempfile_open (const char *tempdir, char **fname) |
6de9cd9a | 1077 | { |
6de9cd9a | 1078 | int fd; |
68ee9c08 | 1079 | const char *slash = "/"; |
a0ceafd1 TB |
1080 | #if defined(HAVE_UMASK) && defined(HAVE_MKSTEMP) |
1081 | mode_t mode_mask; | |
1082 | #endif | |
6de9cd9a | 1083 | |
68ee9c08 JB |
1084 | if (!tempdir) |
1085 | return -1; | |
14bef49e | 1086 | |
68ee9c08 JB |
1087 | /* Check for the special case that tempdir ends with a slash or |
1088 | backslash. */ | |
1089 | size_t tempdirlen = strlen (tempdir); | |
14bef49e | 1090 | if (*tempdir == 0 || tempdir[tempdirlen - 1] == '/' |
e7fc9c75 | 1091 | #ifdef __MINGW32__ |
14bef49e | 1092 | || tempdir[tempdirlen - 1] == '\\' |
e7fc9c75 KT |
1093 | #endif |
1094 | ) | |
1095 | slash = ""; | |
6de9cd9a | 1096 | |
14bef49e | 1097 | // Take care that the template is longer in the mktemp() branch. |
68ee9c08 | 1098 | char * template = xmalloc (tempdirlen + 23); |
6de9cd9a | 1099 | |
41724e6a | 1100 | #ifdef HAVE_MKSTEMP |
d30fe1c5 JB |
1101 | snprintf (template, tempdirlen + 23, "%s%sgfortrantmpXXXXXX", |
1102 | tempdir, slash); | |
6de9cd9a | 1103 | |
a0ceafd1 TB |
1104 | #ifdef HAVE_UMASK |
1105 | /* Temporarily set the umask such that the file has 0600 permissions. */ | |
1106 | mode_mask = umask (S_IXUSR | S_IRWXG | S_IRWXO); | |
1107 | #endif | |
1108 | ||
6de9cd9a DN |
1109 | fd = mkstemp (template); |
1110 | ||
a0ceafd1 TB |
1111 | #ifdef HAVE_UMASK |
1112 | (void) umask (mode_mask); | |
1113 | #endif | |
1114 | ||
41724e6a | 1115 | #else /* HAVE_MKSTEMP */ |
01d42eb5 | 1116 | fd = -1; |
68ee9c08 JB |
1117 | int count = 0; |
1118 | size_t slashlen = strlen (slash); | |
01d42eb5 KT |
1119 | do |
1120 | { | |
d30fe1c5 JB |
1121 | snprintf (template, tempdirlen + 23, "%s%sgfortrantmpaaaXXXXXX", |
1122 | tempdir, slash); | |
14bef49e FXC |
1123 | if (count > 0) |
1124 | { | |
1125 | int c = count; | |
1126 | template[tempdirlen + slashlen + 13] = 'a' + (c% 26); | |
1127 | c /= 26; | |
1128 | template[tempdirlen + slashlen + 12] = 'a' + (c % 26); | |
1129 | c /= 26; | |
1130 | template[tempdirlen + slashlen + 11] = 'a' + (c % 26); | |
1131 | if (c >= 26) | |
1132 | break; | |
1133 | } | |
1134 | ||
01d42eb5 | 1135 | if (!mktemp (template)) |
14bef49e FXC |
1136 | { |
1137 | errno = EEXIST; | |
1138 | count++; | |
1139 | continue; | |
1140 | } | |
1141 | ||
8824fd4c | 1142 | #if defined(HAVE_CRLF) && defined(O_BINARY) |
3c127520 | 1143 | fd = open (template, O_RDWR | O_CREAT | O_EXCL | O_BINARY, |
9daf64e7 | 1144 | S_IRUSR | S_IWUSR); |
3c127520 | 1145 | #else |
9daf64e7 | 1146 | fd = open (template, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR); |
3c127520 | 1147 | #endif |
01d42eb5 KT |
1148 | } |
1149 | while (fd == -1 && errno == EEXIST); | |
41724e6a AL |
1150 | #endif /* HAVE_MKSTEMP */ |
1151 | ||
68ee9c08 JB |
1152 | *fname = template; |
1153 | return fd; | |
1154 | } | |
1155 | ||
1156 | ||
1157 | /* tempfile()-- Generate a temporary filename for a scratch file and | |
1158 | * open it. mkstemp() opens the file for reading and writing, but the | |
1159 | * library mode prevents anything that is not allowed. The descriptor | |
1160 | * is returned, which is -1 on error. The template is pointed to by | |
1161 | * opp->file, which is copied into the unit structure | |
1162 | * and freed later. */ | |
1163 | ||
1164 | static int | |
1165 | tempfile (st_parameter_open *opp) | |
1166 | { | |
1167 | const char *tempdir; | |
1168 | char *fname; | |
1169 | int fd = -1; | |
1170 | ||
1171 | tempdir = secure_getenv ("TMPDIR"); | |
1172 | fd = tempfile_open (tempdir, &fname); | |
1173 | #ifdef __MINGW32__ | |
1174 | if (fd == -1) | |
1175 | { | |
1176 | char buffer[MAX_PATH + 1]; | |
1177 | DWORD ret; | |
1178 | ret = GetTempPath (MAX_PATH, buffer); | |
1179 | /* If we are not able to get a temp-directory, we use | |
1180 | current directory. */ | |
1181 | if (ret > MAX_PATH || !ret) | |
1182 | buffer[0] = 0; | |
1183 | else | |
1184 | buffer[ret] = 0; | |
1185 | tempdir = strdup (buffer); | |
1186 | fd = tempfile_open (tempdir, &fname); | |
1187 | } | |
1188 | #elif defined(__CYGWIN__) | |
1189 | if (fd == -1) | |
1190 | { | |
1191 | tempdir = secure_getenv ("TMP"); | |
1192 | fd = tempfile_open (tempdir, &fname); | |
1193 | } | |
1194 | if (fd == -1) | |
1195 | { | |
1196 | tempdir = secure_getenv ("TEMP"); | |
1197 | fd = tempfile_open (tempdir, &fname); | |
1198 | } | |
1199 | #endif | |
1200 | if (fd == -1) | |
1201 | fd = tempfile_open (P_tmpdir, &fname); | |
1202 | ||
1203 | opp->file = fname; | |
1204 | opp->file_len = strlen (fname); /* Don't include trailing nul */ | |
6de9cd9a DN |
1205 | |
1206 | return fd; | |
1207 | } | |
1208 | ||
1209 | ||
6ecf6dcb | 1210 | /* regular_file()-- Open a regular file. |
d02b2c64 TK |
1211 | * Change flags->action if it is ACTION_UNSPECIFIED on entry, |
1212 | * unless an error occurs. | |
6ecf6dcb | 1213 | * Returns the descriptor, which is less than zero on error. */ |
6de9cd9a DN |
1214 | |
1215 | static int | |
5e805e44 | 1216 | regular_file (st_parameter_open *opp, unit_flags *flags) |
6de9cd9a | 1217 | { |
1e030602 | 1218 | char path[min(PATH_MAX, opp->file_len + 1)]; |
6de9cd9a | 1219 | int mode; |
6ecf6dcb | 1220 | int rwflag; |
d02b2c64 | 1221 | int crflag; |
6ecf6dcb | 1222 | int fd; |
1e030602 | 1223 | int err; |
6de9cd9a | 1224 | |
1e030602 JB |
1225 | err = unpack_filename (path, opp->file, opp->file_len); |
1226 | if (err) | |
6de9cd9a | 1227 | { |
1e030602 | 1228 | errno = err; /* Fake an OS error */ |
6de9cd9a DN |
1229 | return -1; |
1230 | } | |
1231 | ||
d8771b59 JD |
1232 | #ifdef __CYGWIN__ |
1233 | if (opp->file_len == 7) | |
1234 | { | |
1235 | if (strncmp (path, "CONOUT$", 7) == 0 | |
1236 | || strncmp (path, "CONERR$", 7) == 0) | |
1237 | { | |
1238 | fd = open ("/dev/conout", O_WRONLY); | |
1239 | flags->action = ACTION_WRITE; | |
1240 | return fd; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | if (opp->file_len == 6 && strncmp (path, "CONIN$", 6) == 0) | |
1245 | { | |
1246 | fd = open ("/dev/conin", O_RDONLY); | |
1247 | flags->action = ACTION_READ; | |
1248 | return fd; | |
1249 | } | |
1250 | #endif | |
1251 | ||
37d1bbbc JD |
1252 | |
1253 | #ifdef __MINGW32__ | |
1254 | if (opp->file_len == 7) | |
1255 | { | |
1256 | if (strncmp (path, "CONOUT$", 7) == 0 | |
1257 | || strncmp (path, "CONERR$", 7) == 0) | |
1258 | { | |
1259 | fd = open ("CONOUT$", O_WRONLY); | |
1260 | flags->action = ACTION_WRITE; | |
1261 | return fd; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | if (opp->file_len == 6 && strncmp (path, "CONIN$", 6) == 0) | |
1266 | { | |
1267 | fd = open ("CONIN$", O_RDONLY); | |
1268 | flags->action = ACTION_READ; | |
1269 | return fd; | |
1270 | } | |
1271 | #endif | |
1272 | ||
6ecf6dcb | 1273 | rwflag = 0; |
6de9cd9a | 1274 | |
6ecf6dcb | 1275 | switch (flags->action) |
6de9cd9a DN |
1276 | { |
1277 | case ACTION_READ: | |
6ecf6dcb | 1278 | rwflag = O_RDONLY; |
6de9cd9a DN |
1279 | break; |
1280 | ||
1281 | case ACTION_WRITE: | |
6ecf6dcb | 1282 | rwflag = O_WRONLY; |
6de9cd9a DN |
1283 | break; |
1284 | ||
1285 | case ACTION_READWRITE: | |
6ecf6dcb SE |
1286 | case ACTION_UNSPECIFIED: |
1287 | rwflag = O_RDWR; | |
6de9cd9a DN |
1288 | break; |
1289 | ||
1290 | default: | |
5e805e44 | 1291 | internal_error (&opp->common, "regular_file(): Bad action"); |
6de9cd9a DN |
1292 | } |
1293 | ||
6ecf6dcb | 1294 | switch (flags->status) |
6de9cd9a DN |
1295 | { |
1296 | case STATUS_NEW: | |
d02b2c64 | 1297 | crflag = O_CREAT | O_EXCL; |
6de9cd9a DN |
1298 | break; |
1299 | ||
d02b2c64 TK |
1300 | case STATUS_OLD: /* open will fail if the file does not exist*/ |
1301 | crflag = 0; | |
6de9cd9a DN |
1302 | break; |
1303 | ||
1304 | case STATUS_UNKNOWN: | |
1305 | case STATUS_SCRATCH: | |
d02b2c64 | 1306 | crflag = O_CREAT; |
6de9cd9a DN |
1307 | break; |
1308 | ||
1309 | case STATUS_REPLACE: | |
d70d13ac | 1310 | crflag = O_CREAT | O_TRUNC; |
6de9cd9a DN |
1311 | break; |
1312 | ||
1313 | default: | |
5e805e44 | 1314 | internal_error (&opp->common, "regular_file(): Bad status"); |
6de9cd9a DN |
1315 | } |
1316 | ||
6ecf6dcb | 1317 | /* rwflag |= O_LARGEFILE; */ |
6de9cd9a | 1318 | |
8824fd4c | 1319 | #if defined(HAVE_CRLF) && defined(O_BINARY) |
3c127520 FXC |
1320 | crflag |= O_BINARY; |
1321 | #endif | |
1322 | ||
6ecf6dcb | 1323 | mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; |
d02b2c64 TK |
1324 | fd = open (path, rwflag | crflag, mode); |
1325 | if (flags->action != ACTION_UNSPECIFIED) | |
d70d13ac | 1326 | return fd; |
d02b2c64 TK |
1327 | |
1328 | if (fd >= 0) | |
6ecf6dcb | 1329 | { |
d02b2c64 TK |
1330 | flags->action = ACTION_READWRITE; |
1331 | return fd; | |
6ecf6dcb | 1332 | } |
d70d13ac | 1333 | if (errno != EACCES && errno != EROFS) |
d02b2c64 TK |
1334 | return fd; |
1335 | ||
1336 | /* retry for read-only access */ | |
1337 | rwflag = O_RDONLY; | |
1338 | fd = open (path, rwflag | crflag, mode); | |
1339 | if (fd >=0) | |
1340 | { | |
1341 | flags->action = ACTION_READ; | |
10256cbe | 1342 | return fd; /* success */ |
d02b2c64 TK |
1343 | } |
1344 | ||
1345 | if (errno != EACCES) | |
10256cbe | 1346 | return fd; /* failure */ |
d02b2c64 TK |
1347 | |
1348 | /* retry for write-only access */ | |
1349 | rwflag = O_WRONLY; | |
1350 | fd = open (path, rwflag | crflag, mode); | |
1351 | if (fd >=0) | |
1352 | { | |
1353 | flags->action = ACTION_WRITE; | |
10256cbe | 1354 | return fd; /* success */ |
d02b2c64 | 1355 | } |
10256cbe | 1356 | return fd; /* failure */ |
6de9cd9a DN |
1357 | } |
1358 | ||
1359 | ||
1360 | /* open_external()-- Open an external file, unix specific version. | |
6ecf6dcb | 1361 | * Change flags->action if it is ACTION_UNSPECIFIED on entry. |
6de9cd9a DN |
1362 | * Returns NULL on operating system error. */ |
1363 | ||
1364 | stream * | |
5e805e44 | 1365 | open_external (st_parameter_open *opp, unit_flags *flags) |
6de9cd9a | 1366 | { |
332b9a5c | 1367 | int fd; |
6de9cd9a | 1368 | |
6ecf6dcb SE |
1369 | if (flags->status == STATUS_SCRATCH) |
1370 | { | |
5e805e44 | 1371 | fd = tempfile (opp); |
6ecf6dcb | 1372 | if (flags->action == ACTION_UNSPECIFIED) |
10256cbe | 1373 | flags->action = ACTION_READWRITE; |
10c682a0 FXC |
1374 | |
1375 | #if HAVE_UNLINK_OPEN_FILE | |
6ecf6dcb | 1376 | /* We can unlink scratch files now and it will go away when closed. */ |
5e805e44 JJ |
1377 | if (fd >= 0) |
1378 | unlink (opp->file); | |
10c682a0 | 1379 | #endif |
6ecf6dcb SE |
1380 | } |
1381 | else | |
1382 | { | |
d02b2c64 TK |
1383 | /* regular_file resets flags->action if it is ACTION_UNSPECIFIED and |
1384 | * if it succeeds */ | |
5e805e44 | 1385 | fd = regular_file (opp, flags); |
6ecf6dcb | 1386 | } |
6de9cd9a DN |
1387 | |
1388 | if (fd < 0) | |
1389 | return NULL; | |
1390 | fd = fix_fd (fd); | |
1391 | ||
c033f5ae | 1392 | return fd_to_stream (fd, flags->form == FORM_UNFORMATTED); |
6de9cd9a DN |
1393 | } |
1394 | ||
1395 | ||
1396 | /* input_stream()-- Return a stream pointer to the default input stream. | |
1397 | * Called on initialization. */ | |
1398 | ||
1399 | stream * | |
1400 | input_stream (void) | |
1401 | { | |
c033f5ae | 1402 | return fd_to_stream (STDIN_FILENO, false); |
6de9cd9a DN |
1403 | } |
1404 | ||
1405 | ||
fbac3363 | 1406 | /* output_stream()-- Return a stream pointer to the default output stream. |
6de9cd9a DN |
1407 | * Called on initialization. */ |
1408 | ||
1409 | stream * | |
1410 | output_stream (void) | |
1411 | { | |
1f94e1d8 FXC |
1412 | stream * s; |
1413 | ||
6a7c793f DS |
1414 | #if defined(HAVE_CRLF) && defined(HAVE_SETMODE) |
1415 | setmode (STDOUT_FILENO, O_BINARY); | |
1416 | #endif | |
1f94e1d8 | 1417 | |
c033f5ae | 1418 | s = fd_to_stream (STDOUT_FILENO, false); |
1f94e1d8 | 1419 | return s; |
6de9cd9a DN |
1420 | } |
1421 | ||
1422 | ||
fbac3363 DE |
1423 | /* error_stream()-- Return a stream pointer to the default error stream. |
1424 | * Called on initialization. */ | |
1425 | ||
1426 | stream * | |
1427 | error_stream (void) | |
1428 | { | |
1f94e1d8 FXC |
1429 | stream * s; |
1430 | ||
6a7c793f DS |
1431 | #if defined(HAVE_CRLF) && defined(HAVE_SETMODE) |
1432 | setmode (STDERR_FILENO, O_BINARY); | |
1433 | #endif | |
1f94e1d8 | 1434 | |
c033f5ae | 1435 | s = fd_to_stream (STDERR_FILENO, false); |
1f94e1d8 | 1436 | return s; |
fbac3363 DE |
1437 | } |
1438 | ||
6de9cd9a | 1439 | |
6de9cd9a DN |
1440 | /* compare_file_filename()-- Given an open stream and a fortran string |
1441 | * that is a filename, figure out if the file is the same as the | |
1442 | * filename. */ | |
1443 | ||
1444 | int | |
ad238e4f | 1445 | compare_file_filename (gfc_unit *u, const char *name, int len) |
6de9cd9a | 1446 | { |
1e030602 | 1447 | char path[min(PATH_MAX, len + 1)]; |
99ebea03 | 1448 | struct stat st; |
ad238e4f | 1449 | #ifdef HAVE_WORKING_STAT |
7debf73d | 1450 | unix_stream *s; |
fe046210 FXC |
1451 | #else |
1452 | # ifdef __MINGW32__ | |
1453 | uint64_t id1, id2; | |
1454 | # endif | |
ad238e4f | 1455 | #endif |
6de9cd9a DN |
1456 | |
1457 | if (unpack_filename (path, name, len)) | |
1458 | return 0; /* Can't be the same */ | |
1459 | ||
1460 | /* If the filename doesn't exist, then there is no match with the | |
1461 | * existing file. */ | |
1462 | ||
7debf73d | 1463 | if (stat (path, &st) < 0) |
6de9cd9a DN |
1464 | return 0; |
1465 | ||
ad238e4f | 1466 | #ifdef HAVE_WORKING_STAT |
7debf73d JB |
1467 | s = (unix_stream *) (u->s); |
1468 | return (st.st_dev == s->st_dev) && (st.st_ino == s->st_ino); | |
ad238e4f | 1469 | #else |
fe046210 FXC |
1470 | |
1471 | # ifdef __MINGW32__ | |
1472 | /* We try to match files by a unique ID. On some filesystems (network | |
1473 | fs and FAT), we can't generate this unique ID, and will simply compare | |
1474 | filenames. */ | |
1475 | id1 = id_from_path (path); | |
1476 | id2 = id_from_fd (((unix_stream *) (u->s))->fd); | |
1477 | if (id1 || id2) | |
1478 | return (id1 == id2); | |
1479 | # endif | |
1480 | ||
ad238e4f FXC |
1481 | if (len != u->file_len) |
1482 | return 0; | |
1483 | return (memcmp(path, u->file, len) == 0); | |
1484 | #endif | |
6de9cd9a DN |
1485 | } |
1486 | ||
1487 | ||
5e805e44 | 1488 | #ifdef HAVE_WORKING_STAT |
99ebea03 | 1489 | # define FIND_FILE0_DECL struct stat *st |
5e805e44 JJ |
1490 | # define FIND_FILE0_ARGS st |
1491 | #else | |
fe046210 FXC |
1492 | # define FIND_FILE0_DECL uint64_t id, const char *file, gfc_charlen_type file_len |
1493 | # define FIND_FILE0_ARGS id, file, file_len | |
5e805e44 JJ |
1494 | #endif |
1495 | ||
6de9cd9a DN |
1496 | /* find_file0()-- Recursive work function for find_file() */ |
1497 | ||
909087e0 | 1498 | static gfc_unit * |
5e805e44 | 1499 | find_file0 (gfc_unit *u, FIND_FILE0_DECL) |
6de9cd9a | 1500 | { |
909087e0 | 1501 | gfc_unit *v; |
fe046210 FXC |
1502 | #if defined(__MINGW32__) && !HAVE_WORKING_STAT |
1503 | uint64_t id1; | |
1504 | #endif | |
6de9cd9a DN |
1505 | |
1506 | if (u == NULL) | |
1507 | return NULL; | |
1508 | ||
ad238e4f | 1509 | #ifdef HAVE_WORKING_STAT |
7debf73d JB |
1510 | if (u->s != NULL) |
1511 | { | |
1512 | unix_stream *s = (unix_stream *) (u->s); | |
1513 | if (st[0].st_dev == s->st_dev && st[0].st_ino == s->st_ino) | |
1514 | return u; | |
1515 | } | |
ad238e4f | 1516 | #else |
fe046210 FXC |
1517 | # ifdef __MINGW32__ |
1518 | if (u->s && ((id1 = id_from_fd (((unix_stream *) u->s)->fd)) || id1)) | |
1519 | { | |
1520 | if (id == id1) | |
1521 | return u; | |
1522 | } | |
1523 | else | |
1524 | # endif | |
1525 | if (compare_string (u->file_len, u->file, file_len, file) == 0) | |
1526 | return u; | |
ad238e4f | 1527 | #endif |
6de9cd9a | 1528 | |
5e805e44 | 1529 | v = find_file0 (u->left, FIND_FILE0_ARGS); |
6de9cd9a DN |
1530 | if (v != NULL) |
1531 | return v; | |
1532 | ||
5e805e44 | 1533 | v = find_file0 (u->right, FIND_FILE0_ARGS); |
6de9cd9a DN |
1534 | if (v != NULL) |
1535 | return v; | |
1536 | ||
1537 | return NULL; | |
1538 | } | |
1539 | ||
1540 | ||
1541 | /* find_file()-- Take the current filename and see if there is a unit | |
1542 | * that has the file already open. Returns a pointer to the unit if so. */ | |
1543 | ||
909087e0 | 1544 | gfc_unit * |
5e805e44 | 1545 | find_file (const char *file, gfc_charlen_type file_len) |
6de9cd9a | 1546 | { |
1e030602 | 1547 | char path[min(PATH_MAX, file_len + 1)]; |
99ebea03 | 1548 | struct stat st[1]; |
5e805e44 | 1549 | gfc_unit *u; |
509f7fdc KT |
1550 | #if defined(__MINGW32__) && !HAVE_WORKING_STAT |
1551 | uint64_t id = 0ULL; | |
1552 | #endif | |
6de9cd9a | 1553 | |
5e805e44 | 1554 | if (unpack_filename (path, file, file_len)) |
6de9cd9a DN |
1555 | return NULL; |
1556 | ||
5e805e44 | 1557 | if (stat (path, &st[0]) < 0) |
6de9cd9a DN |
1558 | return NULL; |
1559 | ||
fe046210 | 1560 | #if defined(__MINGW32__) && !HAVE_WORKING_STAT |
509f7fdc | 1561 | id = id_from_path (path); |
fe046210 FXC |
1562 | #endif |
1563 | ||
5e805e44 JJ |
1564 | __gthread_mutex_lock (&unit_lock); |
1565 | retry: | |
1566 | u = find_file0 (unit_root, FIND_FILE0_ARGS); | |
1567 | if (u != NULL) | |
1568 | { | |
1569 | /* Fast path. */ | |
1570 | if (! __gthread_mutex_trylock (&u->lock)) | |
1571 | { | |
1572 | /* assert (u->closed == 0); */ | |
1573 | __gthread_mutex_unlock (&unit_lock); | |
1574 | return u; | |
1575 | } | |
1576 | ||
1577 | inc_waiting_locked (u); | |
1578 | } | |
1579 | __gthread_mutex_unlock (&unit_lock); | |
1580 | if (u != NULL) | |
1581 | { | |
1582 | __gthread_mutex_lock (&u->lock); | |
1583 | if (u->closed) | |
1584 | { | |
1585 | __gthread_mutex_lock (&unit_lock); | |
1586 | __gthread_mutex_unlock (&u->lock); | |
1587 | if (predec_waiting_locked (u) == 0) | |
bb408e87 | 1588 | free (u); |
5e805e44 JJ |
1589 | goto retry; |
1590 | } | |
1591 | ||
1592 | dec_waiting_unlocked (u); | |
1593 | } | |
1594 | return u; | |
1595 | } | |
1596 | ||
1597 | static gfc_unit * | |
1598 | flush_all_units_1 (gfc_unit *u, int min_unit) | |
1599 | { | |
1600 | while (u != NULL) | |
1601 | { | |
1602 | if (u->unit_number > min_unit) | |
1603 | { | |
1604 | gfc_unit *r = flush_all_units_1 (u->left, min_unit); | |
1605 | if (r != NULL) | |
1606 | return r; | |
1607 | } | |
1608 | if (u->unit_number >= min_unit) | |
1609 | { | |
1610 | if (__gthread_mutex_trylock (&u->lock)) | |
1611 | return u; | |
1612 | if (u->s) | |
7812c78c | 1613 | sflush (u->s); |
5e805e44 JJ |
1614 | __gthread_mutex_unlock (&u->lock); |
1615 | } | |
1616 | u = u->right; | |
1617 | } | |
1618 | return NULL; | |
1619 | } | |
1620 | ||
1621 | void | |
1622 | flush_all_units (void) | |
1623 | { | |
1624 | gfc_unit *u; | |
1625 | int min_unit = 0; | |
1626 | ||
1627 | __gthread_mutex_lock (&unit_lock); | |
1628 | do | |
1629 | { | |
1630 | u = flush_all_units_1 (unit_root, min_unit); | |
1631 | if (u != NULL) | |
1632 | inc_waiting_locked (u); | |
1633 | __gthread_mutex_unlock (&unit_lock); | |
1634 | if (u == NULL) | |
1635 | return; | |
1636 | ||
1637 | __gthread_mutex_lock (&u->lock); | |
1638 | ||
1639 | min_unit = u->unit_number + 1; | |
1640 | ||
1641 | if (u->closed == 0) | |
1642 | { | |
7812c78c | 1643 | sflush (u->s); |
5e805e44 JJ |
1644 | __gthread_mutex_lock (&unit_lock); |
1645 | __gthread_mutex_unlock (&u->lock); | |
1646 | (void) predec_waiting_locked (u); | |
1647 | } | |
1648 | else | |
1649 | { | |
1650 | __gthread_mutex_lock (&unit_lock); | |
1651 | __gthread_mutex_unlock (&u->lock); | |
1652 | if (predec_waiting_locked (u) == 0) | |
bb408e87 | 1653 | free (u); |
5e805e44 JJ |
1654 | } |
1655 | } | |
1656 | while (1); | |
6de9cd9a DN |
1657 | } |
1658 | ||
1659 | ||
6de9cd9a DN |
1660 | /* delete_file()-- Given a unit structure, delete the file associated |
1661 | * with the unit. Returns nonzero if something went wrong. */ | |
1662 | ||
1663 | int | |
909087e0 | 1664 | delete_file (gfc_unit * u) |
6de9cd9a | 1665 | { |
1e030602 JB |
1666 | char path[min(PATH_MAX, u->file_len + 1)]; |
1667 | int err = unpack_filename (path, u->file, u->file_len); | |
6de9cd9a | 1668 | |
1e030602 | 1669 | if (err) |
6de9cd9a | 1670 | { /* Shouldn't be possible */ |
1e030602 | 1671 | errno = err; |
6de9cd9a DN |
1672 | return 1; |
1673 | } | |
1674 | ||
1675 | return unlink (path); | |
1676 | } | |
1677 | ||
1678 | ||
1679 | /* file_exists()-- Returns nonzero if the current filename exists on | |
1680 | * the system */ | |
1681 | ||
1682 | int | |
5e805e44 | 1683 | file_exists (const char *file, gfc_charlen_type file_len) |
6de9cd9a | 1684 | { |
1e030602 | 1685 | char path[min(PATH_MAX, file_len + 1)]; |
6de9cd9a | 1686 | |
5e805e44 | 1687 | if (unpack_filename (path, file, file_len)) |
6de9cd9a DN |
1688 | return 0; |
1689 | ||
47dad3ff | 1690 | return !(access (path, F_OK)); |
6de9cd9a DN |
1691 | } |
1692 | ||
1693 | ||
41c3cddc JD |
1694 | /* file_size()-- Returns the size of the file. */ |
1695 | ||
1696 | GFC_IO_INT | |
1697 | file_size (const char *file, gfc_charlen_type file_len) | |
1698 | { | |
1e030602 | 1699 | char path[min(PATH_MAX, file_len + 1)]; |
99ebea03 | 1700 | struct stat statbuf; |
41c3cddc JD |
1701 | |
1702 | if (unpack_filename (path, file, file_len)) | |
1703 | return -1; | |
1704 | ||
1705 | if (stat (path, &statbuf) < 0) | |
1706 | return -1; | |
1707 | ||
1708 | return (GFC_IO_INT) statbuf.st_size; | |
1709 | } | |
6de9cd9a | 1710 | |
09003779 | 1711 | static const char yes[] = "YES", no[] = "NO", unknown[] = "UNKNOWN"; |
6de9cd9a DN |
1712 | |
1713 | /* inquire_sequential()-- Given a fortran string, determine if the | |
1714 | * file is suitable for sequential access. Returns a C-style | |
1715 | * string. */ | |
1716 | ||
1717 | const char * | |
1718 | inquire_sequential (const char *string, int len) | |
1719 | { | |
1e030602 | 1720 | char path[min(PATH_MAX, len + 1)]; |
99ebea03 | 1721 | struct stat statbuf; |
6de9cd9a DN |
1722 | |
1723 | if (string == NULL || | |
1724 | unpack_filename (path, string, len) || stat (path, &statbuf) < 0) | |
1725 | return unknown; | |
1726 | ||
1727 | if (S_ISREG (statbuf.st_mode) || | |
1728 | S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode)) | |
17c2c96c | 1729 | return unknown; |
6de9cd9a DN |
1730 | |
1731 | if (S_ISDIR (statbuf.st_mode) || S_ISBLK (statbuf.st_mode)) | |
1732 | return no; | |
1733 | ||
1734 | return unknown; | |
1735 | } | |
1736 | ||
1737 | ||
1738 | /* inquire_direct()-- Given a fortran string, determine if the file is | |
1739 | * suitable for direct access. Returns a C-style string. */ | |
1740 | ||
1741 | const char * | |
1742 | inquire_direct (const char *string, int len) | |
1743 | { | |
1e030602 | 1744 | char path[min(PATH_MAX, len + 1)]; |
99ebea03 | 1745 | struct stat statbuf; |
6de9cd9a DN |
1746 | |
1747 | if (string == NULL || | |
1748 | unpack_filename (path, string, len) || stat (path, &statbuf) < 0) | |
1749 | return unknown; | |
1750 | ||
1751 | if (S_ISREG (statbuf.st_mode) || S_ISBLK (statbuf.st_mode)) | |
17c2c96c | 1752 | return unknown; |
6de9cd9a DN |
1753 | |
1754 | if (S_ISDIR (statbuf.st_mode) || | |
1755 | S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode)) | |
1756 | return no; | |
1757 | ||
1758 | return unknown; | |
1759 | } | |
1760 | ||
1761 | ||
1762 | /* inquire_formatted()-- Given a fortran string, determine if the file | |
1763 | * is suitable for formatted form. Returns a C-style string. */ | |
1764 | ||
1765 | const char * | |
1766 | inquire_formatted (const char *string, int len) | |
1767 | { | |
1e030602 | 1768 | char path[min(PATH_MAX, len + 1)]; |
99ebea03 | 1769 | struct stat statbuf; |
6de9cd9a DN |
1770 | |
1771 | if (string == NULL || | |
1772 | unpack_filename (path, string, len) || stat (path, &statbuf) < 0) | |
1773 | return unknown; | |
1774 | ||
1775 | if (S_ISREG (statbuf.st_mode) || | |
1776 | S_ISBLK (statbuf.st_mode) || | |
1777 | S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode)) | |
17c2c96c | 1778 | return unknown; |
6de9cd9a DN |
1779 | |
1780 | if (S_ISDIR (statbuf.st_mode)) | |
1781 | return no; | |
1782 | ||
1783 | return unknown; | |
1784 | } | |
1785 | ||
1786 | ||
1787 | /* inquire_unformatted()-- Given a fortran string, determine if the file | |
1788 | * is suitable for unformatted form. Returns a C-style string. */ | |
1789 | ||
1790 | const char * | |
1791 | inquire_unformatted (const char *string, int len) | |
1792 | { | |
6de9cd9a DN |
1793 | return inquire_formatted (string, len); |
1794 | } | |
1795 | ||
1796 | ||
1797 | /* inquire_access()-- Given a fortran string, determine if the file is | |
1798 | * suitable for access. */ | |
1799 | ||
1800 | static const char * | |
1801 | inquire_access (const char *string, int len, int mode) | |
1802 | { | |
1e030602 | 1803 | char path[min(PATH_MAX, len + 1)]; |
6de9cd9a DN |
1804 | |
1805 | if (string == NULL || unpack_filename (path, string, len) || | |
1806 | access (path, mode) < 0) | |
1807 | return no; | |
1808 | ||
1809 | return yes; | |
1810 | } | |
1811 | ||
1812 | ||
1813 | /* inquire_read()-- Given a fortran string, determine if the file is | |
1814 | * suitable for READ access. */ | |
1815 | ||
1816 | const char * | |
1817 | inquire_read (const char *string, int len) | |
1818 | { | |
6de9cd9a DN |
1819 | return inquire_access (string, len, R_OK); |
1820 | } | |
1821 | ||
1822 | ||
1823 | /* inquire_write()-- Given a fortran string, determine if the file is | |
1824 | * suitable for READ access. */ | |
1825 | ||
1826 | const char * | |
1827 | inquire_write (const char *string, int len) | |
1828 | { | |
6de9cd9a DN |
1829 | return inquire_access (string, len, W_OK); |
1830 | } | |
1831 | ||
1832 | ||
1833 | /* inquire_readwrite()-- Given a fortran string, determine if the file is | |
1834 | * suitable for read and write access. */ | |
1835 | ||
1836 | const char * | |
1837 | inquire_readwrite (const char *string, int len) | |
1838 | { | |
6de9cd9a DN |
1839 | return inquire_access (string, len, R_OK | W_OK); |
1840 | } | |
1841 | ||
1842 | ||
ae8b8789 FXC |
1843 | int |
1844 | stream_isatty (stream *s) | |
1845 | { | |
1846 | return isatty (((unix_stream *) s)->fd); | |
1847 | } | |
1848 | ||
6a0f6e77 JB |
1849 | int |
1850 | stream_ttyname (stream *s __attribute__ ((unused)), | |
1851 | char * buf __attribute__ ((unused)), | |
1852 | size_t buflen __attribute__ ((unused))) | |
1853 | { | |
1854 | #ifdef HAVE_TTYNAME_R | |
1855 | return ttyname_r (((unix_stream *) s)->fd, buf, buflen); | |
1856 | #elif defined HAVE_TTYNAME | |
1857 | char *p; | |
1858 | size_t plen; | |
1859 | p = ttyname (((unix_stream *) s)->fd); | |
1860 | if (!p) | |
1861 | return errno; | |
1862 | plen = strlen (p); | |
1863 | if (buflen < plen) | |
1864 | plen = buflen; | |
1865 | memcpy (buf, p, plen); | |
1866 | return 0; | |
8845001b | 1867 | #else |
6a0f6e77 | 1868 | return ENOSYS; |
ce66b6f6 | 1869 | #endif |
6a0f6e77 JB |
1870 | } |
1871 | ||
ce66b6f6 | 1872 | |
ae8b8789 | 1873 | |
6de9cd9a DN |
1874 | |
1875 | /* How files are stored: This is an operating-system specific issue, | |
1876 | and therefore belongs here. There are three cases to consider. | |
1877 | ||
1878 | Direct Access: | |
1879 | Records are written as block of bytes corresponding to the record | |
1880 | length of the file. This goes for both formatted and unformatted | |
1881 | records. Positioning is done explicitly for each data transfer, | |
1882 | so positioning is not much of an issue. | |
1883 | ||
1884 | Sequential Formatted: | |
1885 | Records are separated by newline characters. The newline character | |
1886 | is prohibited from appearing in a string. If it does, this will be | |
1887 | messed up on the next read. End of file is also the end of a record. | |
1888 | ||
1889 | Sequential Unformatted: | |
1890 | In this case, we are merely copying bytes to and from main storage, | |
1891 | yet we need to keep track of varying record lengths. We adopt | |
1892 | the solution used by f2c. Each record contains a pair of length | |
1893 | markers: | |
1894 | ||
10256cbe JD |
1895 | Length of record n in bytes |
1896 | Data of record n | |
1897 | Length of record n in bytes | |
6de9cd9a | 1898 | |
10256cbe JD |
1899 | Length of record n+1 in bytes |
1900 | Data of record n+1 | |
1901 | Length of record n+1 in bytes | |
6de9cd9a DN |
1902 | |
1903 | The length is stored at the end of a record to allow backspacing to the | |
1904 | previous record. Between data transfer statements, the file pointer | |
1905 | is left pointing to the first length of the current record. | |
1906 | ||
1907 | ENDFILE records are never explicitly stored. | |
1908 | ||
1909 | */ |