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b168057a | 1 | /* Copyright (C) 1993-2015 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
1ea89a40 UD |
3 | Written by Per Bothner <bothner@cygnus.com>. |
4 | ||
41bdb6e2 AJ |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
1ea89a40 | 9 | |
41bdb6e2 AJ |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
1ea89a40 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 13 | Lesser General Public License for more details. |
1ea89a40 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. | |
1ea89a40 | 18 | |
41bdb6e2 AJ |
19 | As a special exception, if you link the code in this file with |
20 | files compiled with a GNU compiler to produce an executable, | |
21 | that does not cause the resulting executable to be covered by | |
22 | the GNU Lesser General Public License. This exception does not | |
23 | however invalidate any other reasons why the executable file | |
24 | might be covered by the GNU Lesser General Public License. | |
25 | This exception applies to code released by its copyright holders | |
26 | in files containing the exception. */ | |
1ea89a40 UD |
27 | |
28 | /* This is a compatibility file. If we don't build the libc with | |
29 | versioning don't compile this file. */ | |
16710d58 RM |
30 | #include <shlib-compat.h> |
31 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
1ea89a40 UD |
32 | |
33 | #ifndef _POSIX_SOURCE | |
34 | # define _POSIX_SOURCE | |
35 | #endif | |
bd355af0 | 36 | #define _IO_USE_OLD_IO_FILE |
1ea89a40 UD |
37 | #include "libioP.h" |
38 | #include <fcntl.h> | |
39 | #include <sys/types.h> | |
40 | #include <sys/stat.h> | |
41 | #include <string.h> | |
42 | #include <errno.h> | |
3a90adda | 43 | #include <stdlib.h> |
1ea89a40 UD |
44 | #ifndef errno |
45 | extern int errno; | |
46 | #endif | |
47 | #ifndef __set_errno | |
48 | # define __set_errno(Val) errno = (Val) | |
49 | #endif | |
50 | ||
51 | ||
52 | #ifdef _LIBC | |
53 | # define open(Name, Flags, Prot) __open (Name, Flags, Prot) | |
54 | # define close(FD) __close (FD) | |
1ea89a40 UD |
55 | # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) |
56 | # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) | |
57 | # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) | |
58 | #endif | |
59 | ||
60 | /* An fstream can be in at most one of put mode, get mode, or putback mode. | |
61 | Putback mode is a variant of get mode. | |
62 | ||
63 | In a filebuf, there is only one current position, instead of two | |
64 | separate get and put pointers. In get mode, the current position | |
65 | is that of gptr(); in put mode that of pptr(). | |
66 | ||
67 | The position in the buffer that corresponds to the position | |
68 | in external file system is normally _IO_read_end, except in putback | |
69 | mode, when it is _IO_save_end. | |
70 | If the field _fb._offset is >= 0, it gives the offset in | |
71 | the file as a whole corresponding to eGptr(). (?) | |
72 | ||
73 | PUT MODE: | |
74 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, | |
75 | and _IO_read_base are equal to each other. These are usually equal | |
76 | to _IO_buf_base, though not necessarily if we have switched from | |
77 | get mode to put mode. (The reason is to maintain the invariant | |
78 | that _IO_read_end corresponds to the external file position.) | |
1ffb8c90 | 79 | _IO_write_base is non-NULL and usually equal to _IO_buf_base. |
1ea89a40 UD |
80 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. |
81 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
82 | ||
83 | GET MODE: | |
84 | If a filebuf is in get or putback mode, eback() != egptr(). | |
85 | In get mode, the unread characters are between gptr() and egptr(). | |
86 | The OS file position corresponds to that of egptr(). | |
87 | ||
88 | PUTBACK MODE: | |
89 | Putback mode is used to remember "excess" characters that have | |
90 | been sputbackc'd in a separate putback buffer. | |
91 | In putback mode, the get buffer points to the special putback buffer. | |
92 | The unread characters are the characters between gptr() and egptr() | |
93 | in the putback buffer, as well as the area between save_gptr() | |
94 | and save_egptr(), which point into the original reserve buffer. | |
95 | (The pointers save_gptr() and save_egptr() are the values | |
96 | of gptr() and egptr() at the time putback mode was entered.) | |
97 | The OS position corresponds to that of save_egptr(). | |
98 | ||
99 | LINE BUFFERED OUTPUT: | |
100 | During line buffered output, _IO_write_base==base() && epptr()==base(). | |
101 | However, ptr() may be anywhere between base() and ebuf(). | |
102 | This forces a call to filebuf::overflow(int C) on every put. | |
103 | If there is more space in the buffer, and C is not a '\n', | |
104 | then C is inserted, and pptr() incremented. | |
105 | ||
106 | UNBUFFERED STREAMS: | |
107 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
108 | */ | |
109 | ||
110 | #define CLOSED_FILEBUF_FLAGS \ | |
111 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
112 | ||
113 | ||
114 | void | |
4a381a81 | 115 | attribute_compat_text_section |
1ea89a40 | 116 | _IO_old_file_init (fp) |
2ca8b1ee | 117 | struct _IO_FILE_plus *fp; |
1ea89a40 UD |
118 | { |
119 | /* POSIX.1 allows another file handle to be used to change the position | |
120 | of our file descriptor. Hence we actually don't know the actual | |
121 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
122 | fp->file._old_offset = _IO_pos_BAD; |
123 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
1ea89a40 | 124 | |
d18ea0c5 | 125 | _IO_link_in (fp); |
2ca8b1ee GM |
126 | fp->file._vtable_offset = ((int) sizeof (struct _IO_FILE) |
127 | - (int) sizeof (struct _IO_FILE_complete)); | |
128 | fp->file._fileno = -1; | |
41c26b68 | 129 | |
2fe98a4a UD |
130 | #if defined SHARED && defined _LIBC |
131 | if (__builtin_expect (&_IO_stdin_used != NULL, 1) | |
132 | || (fp != (struct _IO_FILE_plus *) _IO_stdin | |
133 | && fp != (struct _IO_FILE_plus *) _IO_stdout | |
134 | && fp != (struct _IO_FILE_plus *) _IO_stderr)) | |
41c26b68 UD |
135 | /* The object is dynamically allocated and large enough. Initialize |
136 | the _mode element as well. */ | |
2fe98a4a | 137 | ((struct _IO_FILE_complete *) fp)->_mode = -1; |
41c26b68 | 138 | #endif |
1ea89a40 UD |
139 | } |
140 | ||
141 | int | |
4a381a81 | 142 | attribute_compat_text_section |
1ea89a40 UD |
143 | _IO_old_file_close_it (fp) |
144 | _IO_FILE *fp; | |
145 | { | |
146 | int write_status, close_status; | |
147 | if (!_IO_file_is_open (fp)) | |
148 | return EOF; | |
149 | ||
6973fc01 | 150 | write_status = _IO_old_do_flush (fp); |
1ea89a40 | 151 | |
d18ea0c5 | 152 | _IO_unsave_markers (fp); |
1ea89a40 | 153 | |
94b7cc37 UD |
154 | close_status = ((fp->_flags2 & _IO_FLAGS2_NOCLOSE) == 0 |
155 | ? _IO_SYSCLOSE (fp) : 0); | |
1ea89a40 UD |
156 | |
157 | /* Free buffer. */ | |
d18ea0c5 | 158 | _IO_setb (fp, NULL, NULL, 0); |
1ea89a40 UD |
159 | _IO_setg (fp, NULL, NULL, NULL); |
160 | _IO_setp (fp, NULL, NULL); | |
161 | ||
d18ea0c5 | 162 | _IO_un_link ((struct _IO_FILE_plus *) fp); |
1ea89a40 | 163 | fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; |
110215a9 | 164 | fp->_fileno = -1; |
1ea89a40 UD |
165 | fp->_old_offset = _IO_pos_BAD; |
166 | ||
167 | return close_status ? close_status : write_status; | |
168 | } | |
169 | ||
170 | void | |
4a381a81 | 171 | attribute_compat_text_section |
1ea89a40 UD |
172 | _IO_old_file_finish (fp, dummy) |
173 | _IO_FILE *fp; | |
174 | int dummy; | |
175 | { | |
176 | if (_IO_file_is_open (fp)) | |
177 | { | |
6973fc01 | 178 | _IO_old_do_flush (fp); |
1ea89a40 UD |
179 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) |
180 | _IO_SYSCLOSE (fp); | |
181 | } | |
d18ea0c5 | 182 | _IO_default_finish (fp, 0); |
1ea89a40 UD |
183 | } |
184 | ||
185 | _IO_FILE * | |
4a381a81 | 186 | attribute_compat_text_section |
1ea89a40 UD |
187 | _IO_old_file_fopen (fp, filename, mode) |
188 | _IO_FILE *fp; | |
189 | const char *filename; | |
190 | const char *mode; | |
191 | { | |
192 | int oflags = 0, omode; | |
193 | int read_write, fdesc; | |
194 | int oprot = 0666; | |
195 | if (_IO_file_is_open (fp)) | |
196 | return 0; | |
197 | switch (*mode++) | |
198 | { | |
199 | case 'r': | |
200 | omode = O_RDONLY; | |
201 | read_write = _IO_NO_WRITES; | |
202 | break; | |
203 | case 'w': | |
204 | omode = O_WRONLY; | |
205 | oflags = O_CREAT|O_TRUNC; | |
206 | read_write = _IO_NO_READS; | |
207 | break; | |
208 | case 'a': | |
209 | omode = O_WRONLY; | |
210 | oflags = O_CREAT|O_APPEND; | |
211 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
212 | break; | |
213 | default: | |
214 | __set_errno (EINVAL); | |
215 | return NULL; | |
216 | } | |
217 | if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+')) | |
218 | { | |
219 | omode = O_RDWR; | |
220 | read_write &= _IO_IS_APPENDING; | |
221 | } | |
222 | fdesc = open (filename, omode|oflags, oprot); | |
223 | if (fdesc < 0) | |
224 | return NULL; | |
225 | fp->_fileno = fdesc; | |
226 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
227 | if (read_write & _IO_IS_APPENDING) | |
228 | if (_IO_SEEKOFF (fp, (_IO_off_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT) | |
229 | == _IO_pos_BAD && errno != ESPIPE) | |
230 | return NULL; | |
d18ea0c5 | 231 | _IO_link_in ((struct _IO_FILE_plus *) fp); |
1ea89a40 UD |
232 | return fp; |
233 | } | |
234 | ||
235 | _IO_FILE * | |
4a381a81 | 236 | attribute_compat_text_section |
1ea89a40 UD |
237 | _IO_old_file_attach (fp, fd) |
238 | _IO_FILE *fp; | |
239 | int fd; | |
240 | { | |
241 | if (_IO_file_is_open (fp)) | |
242 | return NULL; | |
243 | fp->_fileno = fd; | |
244 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
245 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
246 | /* Get the current position of the file. */ | |
247 | /* We have to do that since that may be junk. */ | |
248 | fp->_old_offset = _IO_pos_BAD; | |
249 | if (_IO_SEEKOFF (fp, (_IO_off_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) | |
250 | == _IO_pos_BAD && errno != ESPIPE) | |
251 | return NULL; | |
252 | return fp; | |
253 | } | |
254 | ||
255 | _IO_FILE * | |
4a381a81 | 256 | attribute_compat_text_section |
1ea89a40 UD |
257 | _IO_old_file_setbuf (fp, p, len) |
258 | _IO_FILE *fp; | |
259 | char *p; | |
260 | _IO_ssize_t len; | |
261 | { | |
262 | if (_IO_default_setbuf (fp, p, len) == NULL) | |
263 | return NULL; | |
264 | ||
265 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
266 | = fp->_IO_buf_base; | |
267 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
268 | ||
269 | return fp; | |
270 | } | |
271 | ||
0fca3153 | 272 | static int old_do_write (_IO_FILE *, const char *, _IO_size_t); |
0720f75c | 273 | |
1ea89a40 UD |
274 | /* Write TO_DO bytes from DATA to FP. |
275 | Then mark FP as having empty buffers. */ | |
276 | ||
277 | int | |
4a381a81 | 278 | attribute_compat_text_section |
1ea89a40 UD |
279 | _IO_old_do_write (fp, data, to_do) |
280 | _IO_FILE *fp; | |
281 | const char *data; | |
282 | _IO_size_t to_do; | |
0720f75c | 283 | { |
57b36a0a | 284 | return (to_do == 0 || (_IO_size_t) old_do_write (fp, data, to_do) == to_do) |
0720f75c UD |
285 | ? 0 : EOF; |
286 | } | |
287 | ||
4a381a81 UD |
288 | static int |
289 | attribute_compat_text_section | |
0720f75c UD |
290 | old_do_write (fp, data, to_do) |
291 | _IO_FILE *fp; | |
292 | const char *data; | |
293 | _IO_size_t to_do; | |
1ea89a40 UD |
294 | { |
295 | _IO_size_t count; | |
1ea89a40 UD |
296 | if (fp->_flags & _IO_IS_APPENDING) |
297 | /* On a system without a proper O_APPEND implementation, | |
298 | you would need to sys_seek(0, SEEK_END) here, but is | |
ded5b9b7 | 299 | not needed nor desirable for Unix- or Posix-like systems. |
1ea89a40 UD |
300 | Instead, just indicate that offset (before and after) is |
301 | unpredictable. */ | |
302 | fp->_old_offset = _IO_pos_BAD; | |
303 | else if (fp->_IO_read_end != fp->_IO_write_base) | |
304 | { | |
d64b6ad0 | 305 | _IO_off_t new_pos |
1ea89a40 UD |
306 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
307 | if (new_pos == _IO_pos_BAD) | |
0720f75c | 308 | return 0; |
1ea89a40 UD |
309 | fp->_old_offset = new_pos; |
310 | } | |
311 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 312 | if (fp->_cur_column && count) |
d18ea0c5 | 313 | fp->_cur_column = _IO_adjust_column (fp->_cur_column - 1, data, count) + 1; |
1ea89a40 UD |
314 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
315 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; | |
316 | fp->_IO_write_end = ((fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) | |
317 | ? fp->_IO_buf_base : fp->_IO_buf_end); | |
0720f75c | 318 | return count; |
1ea89a40 UD |
319 | } |
320 | ||
321 | int | |
4a381a81 | 322 | attribute_compat_text_section |
1ea89a40 UD |
323 | _IO_old_file_underflow (fp) |
324 | _IO_FILE *fp; | |
325 | { | |
326 | _IO_ssize_t count; | |
327 | #if 0 | |
328 | /* SysV does not make this test; take it out for compatibility */ | |
329 | if (fp->_flags & _IO_EOF_SEEN) | |
330 | return (EOF); | |
331 | #endif | |
332 | ||
333 | if (fp->_flags & _IO_NO_READS) | |
334 | { | |
58034572 | 335 | fp->_flags |= _IO_ERR_SEEN; |
1ea89a40 UD |
336 | __set_errno (EBADF); |
337 | return EOF; | |
338 | } | |
339 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
340 | return *(unsigned char *) fp->_IO_read_ptr; | |
341 | ||
342 | if (fp->_IO_buf_base == NULL) | |
3a90adda AS |
343 | { |
344 | /* Maybe we already have a push back pointer. */ | |
345 | if (fp->_IO_save_base != NULL) | |
346 | { | |
347 | free (fp->_IO_save_base); | |
348 | fp->_flags &= ~_IO_IN_BACKUP; | |
349 | } | |
d18ea0c5 | 350 | _IO_doallocbuf (fp); |
3a90adda | 351 | } |
1ea89a40 UD |
352 | |
353 | /* Flush all line buffered files before reading. */ | |
354 | /* FIXME This can/should be moved to genops ?? */ | |
355 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
d18ea0c5 | 356 | _IO_flush_all_linebuffered (); |
1ea89a40 | 357 | |
d18ea0c5 | 358 | _IO_switch_to_get_mode (fp); |
1ea89a40 UD |
359 | |
360 | /* This is very tricky. We have to adjust those | |
361 | pointers before we call _IO_SYSREAD () since | |
362 | we may longjump () out while waiting for | |
363 | input. Those pointers may be screwed up. H.J. */ | |
364 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
365 | fp->_IO_read_end = fp->_IO_buf_base; | |
366 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
367 | = fp->_IO_buf_base; | |
368 | ||
369 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
370 | fp->_IO_buf_end - fp->_IO_buf_base); | |
371 | if (count <= 0) | |
372 | { | |
373 | if (count == 0) | |
374 | fp->_flags |= _IO_EOF_SEEN; | |
375 | else | |
376 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
377 | } | |
378 | fp->_IO_read_end += count; | |
379 | if (count == 0) | |
380 | return EOF; | |
381 | if (fp->_old_offset != _IO_pos_BAD) | |
382 | _IO_pos_adjust (fp->_old_offset, count); | |
383 | return *(unsigned char *) fp->_IO_read_ptr; | |
384 | } | |
385 | ||
386 | int | |
4a381a81 | 387 | attribute_compat_text_section |
1ea89a40 UD |
388 | _IO_old_file_overflow (f, ch) |
389 | _IO_FILE *f; | |
390 | int ch; | |
391 | { | |
392 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
393 | { | |
394 | f->_flags |= _IO_ERR_SEEN; | |
395 | __set_errno (EBADF); | |
396 | return EOF; | |
397 | } | |
398 | /* If currently reading or no buffer allocated. */ | |
399 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0) | |
400 | { | |
401 | /* Allocate a buffer if needed. */ | |
402 | if (f->_IO_write_base == 0) | |
403 | { | |
d18ea0c5 | 404 | _IO_doallocbuf (f); |
1ea89a40 UD |
405 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
406 | } | |
407 | /* Otherwise must be currently reading. | |
408 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
409 | logically slide the buffer forwards one block (by setting the | |
410 | read pointers to all point at the beginning of the block). This | |
411 | makes room for subsequent output. | |
412 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
413 | alone, so it can continue to correspond to the external position). */ | |
414 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
415 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
416 | f->_IO_write_ptr = f->_IO_read_ptr; | |
417 | f->_IO_write_base = f->_IO_write_ptr; | |
418 | f->_IO_write_end = f->_IO_buf_end; | |
419 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
420 | ||
421 | if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) | |
422 | f->_IO_write_end = f->_IO_write_ptr; | |
423 | f->_flags |= _IO_CURRENTLY_PUTTING; | |
424 | } | |
425 | if (ch == EOF) | |
6973fc01 | 426 | return _IO_old_do_flush (f); |
1ea89a40 | 427 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
6973fc01 | 428 | if (_IO_old_do_flush (f) == EOF) |
1ea89a40 UD |
429 | return EOF; |
430 | *f->_IO_write_ptr++ = ch; | |
431 | if ((f->_flags & _IO_UNBUFFERED) | |
432 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
6973fc01 | 433 | if (_IO_old_do_flush (f) == EOF) |
1ea89a40 UD |
434 | return EOF; |
435 | return (unsigned char) ch; | |
436 | } | |
437 | ||
438 | int | |
4a381a81 | 439 | attribute_compat_text_section |
1ea89a40 UD |
440 | _IO_old_file_sync (fp) |
441 | _IO_FILE *fp; | |
442 | { | |
3a90adda | 443 | _IO_ssize_t delta; |
1ea89a40 UD |
444 | int retval = 0; |
445 | ||
1ea89a40 UD |
446 | /* char* ptr = cur_ptr(); */ |
447 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
6973fc01 | 448 | if (_IO_old_do_flush(fp)) return EOF; |
1ea89a40 UD |
449 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
450 | if (delta != 0) | |
451 | { | |
452 | #ifdef TODO | |
453 | if (_IO_in_backup (fp)) | |
454 | delta -= eGptr () - Gbase (); | |
455 | #endif | |
456 | _IO_off_t new_pos = _IO_SYSSEEK (fp, delta, 1); | |
457 | if (new_pos != (_IO_off_t) EOF) | |
458 | fp->_IO_read_end = fp->_IO_read_ptr; | |
459 | #ifdef ESPIPE | |
460 | else if (errno == ESPIPE) | |
461 | ; /* Ignore error from unseekable devices. */ | |
462 | #endif | |
463 | else | |
464 | retval = EOF; | |
465 | } | |
466 | if (retval != EOF) | |
467 | fp->_old_offset = _IO_pos_BAD; | |
468 | /* FIXME: Cleanup - can this be shared? */ | |
469 | /* setg(base(), ptr, ptr); */ | |
1ea89a40 UD |
470 | return retval; |
471 | } | |
472 | ||
d64b6ad0 | 473 | _IO_off64_t |
4a381a81 | 474 | attribute_compat_text_section |
1ea89a40 UD |
475 | _IO_old_file_seekoff (fp, offset, dir, mode) |
476 | _IO_FILE *fp; | |
477 | _IO_off64_t offset; | |
478 | int dir; | |
479 | int mode; | |
480 | { | |
d64b6ad0 | 481 | _IO_off_t result; |
1ea89a40 UD |
482 | _IO_off64_t delta, new_offset; |
483 | long count; | |
484 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file | |
485 | offset of the underlying file must be exact. */ | |
486 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
487 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
488 | ||
489 | if (mode == 0) | |
490 | dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */ | |
491 | ||
492 | /* Flush unwritten characters. | |
493 | (This may do an unneeded write if we seek within the buffer. | |
494 | But to be able to switch to reading, we would need to set | |
1ffb8c90 | 495 | egptr to pptr. That can't be done in the current design, |
1ea89a40 UD |
496 | which assumes file_ptr() is eGptr. Anyway, since we probably |
497 | end up flushing when we close(), it doesn't make much difference.) | |
1ffb8c90 | 498 | FIXME: simulate mem-mapped files. */ |
1ea89a40 UD |
499 | |
500 | if (fp->_IO_write_ptr > fp->_IO_write_base || _IO_in_put_mode (fp)) | |
d18ea0c5 | 501 | if (_IO_switch_to_get_mode (fp)) |
1ea89a40 UD |
502 | return EOF; |
503 | ||
504 | if (fp->_IO_buf_base == NULL) | |
505 | { | |
3a90adda AS |
506 | /* It could be that we already have a pushback buffer. */ |
507 | if (fp->_IO_read_base != NULL) | |
508 | { | |
509 | free (fp->_IO_read_base); | |
510 | fp->_flags &= ~_IO_IN_BACKUP; | |
511 | } | |
d18ea0c5 | 512 | _IO_doallocbuf (fp); |
1ea89a40 UD |
513 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
514 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
515 | } | |
516 | ||
517 | switch (dir) | |
518 | { | |
519 | case _IO_seek_cur: | |
520 | /* Adjust for read-ahead (bytes is buffer). */ | |
521 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
522 | if (fp->_old_offset == _IO_pos_BAD) | |
523 | goto dumb; | |
524 | /* Make offset absolute, assuming current pointer is file_ptr(). */ | |
d64b6ad0 | 525 | offset += fp->_old_offset; |
1ea89a40 UD |
526 | |
527 | dir = _IO_seek_set; | |
528 | break; | |
529 | case _IO_seek_set: | |
530 | break; | |
531 | case _IO_seek_end: | |
532 | { | |
c8450f70 | 533 | struct stat64 st; |
1ea89a40 UD |
534 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
535 | { | |
536 | offset += st.st_size; | |
537 | dir = _IO_seek_set; | |
538 | } | |
539 | else | |
540 | goto dumb; | |
541 | } | |
542 | } | |
543 | /* At this point, dir==_IO_seek_set. */ | |
544 | ||
3a90adda AS |
545 | /* If we are only interested in the current position we've found it now. */ |
546 | if (mode == 0) | |
547 | return offset; | |
548 | ||
1ea89a40 UD |
549 | /* If destination is within current buffer, optimize: */ |
550 | if (fp->_old_offset != _IO_pos_BAD && fp->_IO_read_base != NULL | |
551 | && !_IO_in_backup (fp)) | |
552 | { | |
553 | /* Offset relative to start of main get area. */ | |
d64b6ad0 | 554 | _IO_off_t rel_offset = (offset - fp->_old_offset |
1ea89a40 UD |
555 | + (fp->_IO_read_end - fp->_IO_read_base)); |
556 | if (rel_offset >= 0) | |
557 | { | |
558 | #if 0 | |
559 | if (_IO_in_backup (fp)) | |
560 | _IO_switch_to_main_get_area (fp); | |
561 | #endif | |
562 | if (rel_offset <= fp->_IO_read_end - fp->_IO_read_base) | |
563 | { | |
564 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + rel_offset, | |
565 | fp->_IO_read_end); | |
566 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
3a90adda AS |
567 | { |
568 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
569 | goto resync; | |
570 | } | |
1ea89a40 UD |
571 | } |
572 | #ifdef TODO | |
573 | /* If we have streammarkers, seek forward by reading ahead. */ | |
574 | if (_IO_have_markers (fp)) | |
575 | { | |
576 | int to_skip = rel_offset | |
577 | - (fp->_IO_read_ptr - fp->_IO_read_base); | |
578 | if (ignore (to_skip) != to_skip) | |
579 | goto dumb; | |
3a90adda | 580 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 581 | goto resync; |
1ea89a40 UD |
582 | } |
583 | #endif | |
584 | } | |
585 | #ifdef TODO | |
586 | if (rel_offset < 0 && rel_offset >= Bbase () - Bptr ()) | |
587 | { | |
588 | if (!_IO_in_backup (fp)) | |
589 | _IO_switch_to_backup_area (fp); | |
590 | gbump (fp->_IO_read_end + rel_offset - fp->_IO_read_ptr); | |
3a90adda | 591 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 592 | goto resync; |
1ea89a40 UD |
593 | } |
594 | #endif | |
595 | } | |
596 | ||
597 | #ifdef TODO | |
d18ea0c5 | 598 | _IO_unsave_markers (fp); |
1ea89a40 UD |
599 | #endif |
600 | ||
601 | if (fp->_flags & _IO_NO_READS) | |
602 | goto dumb; | |
603 | ||
604 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
605 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
606 | delta = offset - new_offset; | |
607 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
608 | { | |
609 | new_offset = offset; | |
610 | delta = 0; | |
611 | } | |
612 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
613 | if (result < 0) | |
614 | return EOF; | |
615 | if (delta == 0) | |
616 | count = 0; | |
617 | else | |
618 | { | |
619 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
620 | (must_be_exact | |
621 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
622 | if (count < delta) | |
623 | { | |
624 | /* We weren't allowed to read, but try to seek the remainder. */ | |
625 | offset = count == EOF ? delta : delta-count; | |
626 | dir = _IO_seek_cur; | |
627 | goto dumb; | |
628 | } | |
629 | } | |
630 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, | |
631 | fp->_IO_buf_base + count); | |
632 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
633 | fp->_old_offset = result + count; | |
634 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
635 | return offset; | |
636 | dumb: | |
637 | ||
d18ea0c5 | 638 | _IO_unsave_markers (fp); |
1ea89a40 UD |
639 | result = _IO_SYSSEEK (fp, offset, dir); |
640 | if (result != EOF) | |
1ddf537f UD |
641 | { |
642 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
643 | fp->_old_offset = result; | |
644 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
645 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
646 | } | |
1ea89a40 | 647 | return result; |
4a582094 UD |
648 | |
649 | resync: | |
650 | /* We need to do it since it is possible that the file offset in | |
651 | the kernel may be changed behind our back. It may happen when | |
652 | we fopen a file and then do a fork. One process may access the | |
ded5b9b7 | 653 | file and the kernel file offset will be changed. */ |
4a582094 UD |
654 | if (fp->_old_offset >= 0) |
655 | _IO_SYSSEEK (fp, fp->_old_offset, 0); | |
656 | ||
657 | return offset; | |
1ea89a40 UD |
658 | } |
659 | ||
660 | _IO_ssize_t | |
4a381a81 | 661 | attribute_compat_text_section |
1ea89a40 UD |
662 | _IO_old_file_write (f, data, n) |
663 | _IO_FILE *f; | |
664 | const void *data; | |
665 | _IO_ssize_t n; | |
666 | { | |
667 | _IO_ssize_t to_do = n; | |
668 | while (to_do > 0) | |
669 | { | |
670 | _IO_ssize_t count = write (f->_fileno, data, to_do); | |
671 | if (count == EOF) | |
672 | { | |
673 | f->_flags |= _IO_ERR_SEEN; | |
674 | break; | |
94b7cc37 | 675 | } |
1ea89a40 UD |
676 | to_do -= count; |
677 | data = (void *) ((char *) data + count); | |
678 | } | |
679 | n -= to_do; | |
680 | if (f->_old_offset >= 0) | |
681 | f->_old_offset += n; | |
682 | return n; | |
683 | } | |
684 | ||
685 | _IO_size_t | |
4a381a81 | 686 | attribute_compat_text_section |
1ea89a40 UD |
687 | _IO_old_file_xsputn (f, data, n) |
688 | _IO_FILE *f; | |
689 | const void *data; | |
690 | _IO_size_t n; | |
691 | { | |
2e09a79a | 692 | const char *s = (char *) data; |
1ea89a40 UD |
693 | _IO_size_t to_do = n; |
694 | int must_flush = 0; | |
cae6ebb2 | 695 | _IO_size_t count = 0; |
1ea89a40 UD |
696 | |
697 | if (n <= 0) | |
698 | return 0; | |
699 | /* This is an optimized implementation. | |
700 | If the amount to be written straddles a block boundary | |
701 | (or the filebuf is unbuffered), use sys_write directly. */ | |
702 | ||
703 | /* First figure out how much space is available in the buffer. */ | |
1ea89a40 UD |
704 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) |
705 | { | |
706 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
707 | if (count >= n) | |
708 | { | |
2e09a79a | 709 | const char *p; |
1ea89a40 UD |
710 | for (p = s + n; p > s; ) |
711 | { | |
712 | if (*--p == '\n') | |
713 | { | |
714 | count = p - s + 1; | |
715 | must_flush = 1; | |
716 | break; | |
717 | } | |
718 | } | |
719 | } | |
720 | } | |
cae6ebb2 UD |
721 | else if (f->_IO_write_end > f->_IO_write_ptr) |
722 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ | |
723 | ||
1ea89a40 UD |
724 | /* Then fill the buffer. */ |
725 | if (count > 0) | |
726 | { | |
727 | if (count > to_do) | |
728 | count = to_do; | |
729 | if (count > 20) | |
730 | { | |
3a90adda AS |
731 | #ifdef _LIBC |
732 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); | |
733 | #else | |
1ea89a40 | 734 | memcpy (f->_IO_write_ptr, s, count); |
3a90adda AS |
735 | f->_IO_write_ptr += count; |
736 | #endif | |
1ea89a40 UD |
737 | s += count; |
738 | } | |
739 | else | |
740 | { | |
2e09a79a JM |
741 | char *p = f->_IO_write_ptr; |
742 | int i = (int) count; | |
1ea89a40 UD |
743 | while (--i >= 0) |
744 | *p++ = *s++; | |
3a90adda | 745 | f->_IO_write_ptr = p; |
1ea89a40 | 746 | } |
1ea89a40 UD |
747 | to_do -= count; |
748 | } | |
749 | if (to_do + must_flush > 0) | |
750 | { | |
0720f75c | 751 | _IO_size_t block_size, do_write; |
1ea89a40 UD |
752 | /* Next flush the (full) buffer. */ |
753 | if (__overflow (f, EOF) == EOF) | |
5d1d7adb | 754 | return to_do == 0 ? EOF : n - to_do; |
1ea89a40 UD |
755 | |
756 | /* Try to maintain alignment: write a whole number of blocks. | |
757 | dont_write is what gets left over. */ | |
758 | block_size = f->_IO_buf_end - f->_IO_buf_base; | |
0720f75c UD |
759 | do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); |
760 | ||
761 | if (do_write) | |
94b7cc37 | 762 | { |
0720f75c UD |
763 | count = old_do_write (f, s, do_write); |
764 | to_do -= count; | |
765 | if (count < do_write) | |
766 | return n - to_do; | |
94b7cc37 | 767 | } |
1ea89a40 UD |
768 | |
769 | /* Now write out the remainder. Normally, this will fit in the | |
770 | buffer, but it's somewhat messier for line-buffered files, | |
771 | so we let _IO_default_xsputn handle the general case. */ | |
0720f75c | 772 | if (to_do) |
d18ea0c5 | 773 | to_do -= _IO_default_xsputn (f, s+do_write, to_do); |
1ea89a40 UD |
774 | } |
775 | return n - to_do; | |
776 | } | |
777 | ||
778 | ||
b2637a22 | 779 | const struct _IO_jump_t _IO_old_file_jumps = |
1ea89a40 UD |
780 | { |
781 | JUMP_INIT_DUMMY, | |
782 | JUMP_INIT(finish, _IO_old_file_finish), | |
783 | JUMP_INIT(overflow, _IO_old_file_overflow), | |
784 | JUMP_INIT(underflow, _IO_old_file_underflow), | |
d18ea0c5 AS |
785 | JUMP_INIT(uflow, _IO_default_uflow), |
786 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
1ea89a40 | 787 | JUMP_INIT(xsputn, _IO_old_file_xsputn), |
d18ea0c5 | 788 | JUMP_INIT(xsgetn, _IO_default_xsgetn), |
1ea89a40 UD |
789 | JUMP_INIT(seekoff, _IO_old_file_seekoff), |
790 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
791 | JUMP_INIT(setbuf, _IO_old_file_setbuf), | |
86187531 | 792 | JUMP_INIT(sync, _IO_old_file_sync), |
d18ea0c5 AS |
793 | JUMP_INIT(doallocate, _IO_file_doallocate), |
794 | JUMP_INIT(read, _IO_file_read), | |
86187531 | 795 | JUMP_INIT(write, _IO_old_file_write), |
d18ea0c5 AS |
796 | JUMP_INIT(seek, _IO_file_seek), |
797 | JUMP_INIT(close, _IO_file_close), | |
798 | JUMP_INIT(stat, _IO_file_stat) | |
1ea89a40 UD |
799 | }; |
800 | ||
16710d58 RM |
801 | compat_symbol (libc, _IO_old_do_write, _IO_do_write, GLIBC_2_0); |
802 | compat_symbol (libc, _IO_old_file_attach, _IO_file_attach, GLIBC_2_0); | |
803 | compat_symbol (libc, _IO_old_file_close_it, _IO_file_close_it, GLIBC_2_0); | |
804 | compat_symbol (libc, _IO_old_file_finish, _IO_file_finish, GLIBC_2_0); | |
805 | compat_symbol (libc, _IO_old_file_fopen, _IO_file_fopen, GLIBC_2_0); | |
806 | compat_symbol (libc, _IO_old_file_init, _IO_file_init, GLIBC_2_0); | |
807 | compat_symbol (libc, _IO_old_file_setbuf, _IO_file_setbuf, GLIBC_2_0); | |
808 | compat_symbol (libc, _IO_old_file_sync, _IO_file_sync, GLIBC_2_0); | |
809 | compat_symbol (libc, _IO_old_file_overflow, _IO_file_overflow, GLIBC_2_0); | |
810 | compat_symbol (libc, _IO_old_file_seekoff, _IO_file_seekoff, GLIBC_2_0); | |
811 | compat_symbol (libc, _IO_old_file_underflow, _IO_file_underflow, GLIBC_2_0); | |
812 | compat_symbol (libc, _IO_old_file_write, _IO_file_write, GLIBC_2_0); | |
813 | compat_symbol (libc, _IO_old_file_xsputn, _IO_file_xsputn, GLIBC_2_0); | |
814 | ||
815 | #endif |