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11bf311e | 1 | /* Copyright (C) 1993, 1995, 1997-2004, 2005 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 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. | |
1ea89a40 | 19 | |
41bdb6e2 AJ |
20 | As a special exception, if you link the code in this file with |
21 | files compiled with a GNU compiler to produce an executable, | |
22 | that does not cause the resulting executable to be covered by | |
23 | the GNU Lesser General Public License. This exception does not | |
24 | however invalidate any other reasons why the executable file | |
25 | might be covered by the GNU Lesser General Public License. | |
26 | This exception applies to code released by its copyright holders | |
27 | in files containing the exception. */ | |
1ea89a40 UD |
28 | |
29 | /* This is a compatibility file. If we don't build the libc with | |
30 | versioning don't compile this file. */ | |
16710d58 RM |
31 | #include <shlib-compat.h> |
32 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
1ea89a40 UD |
33 | |
34 | #ifndef _POSIX_SOURCE | |
35 | # define _POSIX_SOURCE | |
36 | #endif | |
bd355af0 | 37 | #define _IO_USE_OLD_IO_FILE |
1ea89a40 UD |
38 | #include "libioP.h" |
39 | #include <fcntl.h> | |
40 | #include <sys/types.h> | |
41 | #include <sys/stat.h> | |
42 | #include <string.h> | |
43 | #include <errno.h> | |
3a90adda AS |
44 | #ifdef __STDC__ |
45 | #include <stdlib.h> | |
46 | #endif | |
1ea89a40 UD |
47 | #ifndef errno |
48 | extern int errno; | |
49 | #endif | |
50 | #ifndef __set_errno | |
51 | # define __set_errno(Val) errno = (Val) | |
52 | #endif | |
53 | ||
54 | ||
55 | #ifdef _LIBC | |
56 | # define open(Name, Flags, Prot) __open (Name, Flags, Prot) | |
57 | # define close(FD) __close (FD) | |
1ea89a40 UD |
58 | # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) |
59 | # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) | |
60 | # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) | |
61 | #endif | |
62 | ||
63 | /* An fstream can be in at most one of put mode, get mode, or putback mode. | |
64 | Putback mode is a variant of get mode. | |
65 | ||
66 | In a filebuf, there is only one current position, instead of two | |
67 | separate get and put pointers. In get mode, the current position | |
68 | is that of gptr(); in put mode that of pptr(). | |
69 | ||
70 | The position in the buffer that corresponds to the position | |
71 | in external file system is normally _IO_read_end, except in putback | |
72 | mode, when it is _IO_save_end. | |
73 | If the field _fb._offset is >= 0, it gives the offset in | |
74 | the file as a whole corresponding to eGptr(). (?) | |
75 | ||
76 | PUT MODE: | |
77 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, | |
78 | and _IO_read_base are equal to each other. These are usually equal | |
79 | to _IO_buf_base, though not necessarily if we have switched from | |
80 | get mode to put mode. (The reason is to maintain the invariant | |
81 | that _IO_read_end corresponds to the external file position.) | |
82 | _IO_write_base is non-NULL and usually equal to _IO_base_base. | |
83 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. | |
84 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
85 | ||
86 | GET MODE: | |
87 | If a filebuf is in get or putback mode, eback() != egptr(). | |
88 | In get mode, the unread characters are between gptr() and egptr(). | |
89 | The OS file position corresponds to that of egptr(). | |
90 | ||
91 | PUTBACK MODE: | |
92 | Putback mode is used to remember "excess" characters that have | |
93 | been sputbackc'd in a separate putback buffer. | |
94 | In putback mode, the get buffer points to the special putback buffer. | |
95 | The unread characters are the characters between gptr() and egptr() | |
96 | in the putback buffer, as well as the area between save_gptr() | |
97 | and save_egptr(), which point into the original reserve buffer. | |
98 | (The pointers save_gptr() and save_egptr() are the values | |
99 | of gptr() and egptr() at the time putback mode was entered.) | |
100 | The OS position corresponds to that of save_egptr(). | |
101 | ||
102 | LINE BUFFERED OUTPUT: | |
103 | During line buffered output, _IO_write_base==base() && epptr()==base(). | |
104 | However, ptr() may be anywhere between base() and ebuf(). | |
105 | This forces a call to filebuf::overflow(int C) on every put. | |
106 | If there is more space in the buffer, and C is not a '\n', | |
107 | then C is inserted, and pptr() incremented. | |
108 | ||
109 | UNBUFFERED STREAMS: | |
110 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
111 | */ | |
112 | ||
113 | #define CLOSED_FILEBUF_FLAGS \ | |
114 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
115 | ||
116 | ||
117 | void | |
4a381a81 | 118 | attribute_compat_text_section |
1ea89a40 | 119 | _IO_old_file_init (fp) |
2ca8b1ee | 120 | struct _IO_FILE_plus *fp; |
1ea89a40 UD |
121 | { |
122 | /* POSIX.1 allows another file handle to be used to change the position | |
123 | of our file descriptor. Hence we actually don't know the actual | |
124 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
125 | fp->file._old_offset = _IO_pos_BAD; |
126 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
1ea89a40 | 127 | |
77fe0b9c | 128 | INTUSE(_IO_link_in) (fp); |
2ca8b1ee GM |
129 | fp->file._vtable_offset = ((int) sizeof (struct _IO_FILE) |
130 | - (int) sizeof (struct _IO_FILE_complete)); | |
131 | fp->file._fileno = -1; | |
41c26b68 | 132 | |
2fe98a4a UD |
133 | #if defined SHARED && defined _LIBC |
134 | if (__builtin_expect (&_IO_stdin_used != NULL, 1) | |
135 | || (fp != (struct _IO_FILE_plus *) _IO_stdin | |
136 | && fp != (struct _IO_FILE_plus *) _IO_stdout | |
137 | && fp != (struct _IO_FILE_plus *) _IO_stderr)) | |
41c26b68 UD |
138 | /* The object is dynamically allocated and large enough. Initialize |
139 | the _mode element as well. */ | |
2fe98a4a | 140 | ((struct _IO_FILE_complete *) fp)->_mode = -1; |
41c26b68 | 141 | #endif |
1ea89a40 UD |
142 | } |
143 | ||
144 | int | |
4a381a81 | 145 | attribute_compat_text_section |
1ea89a40 UD |
146 | _IO_old_file_close_it (fp) |
147 | _IO_FILE *fp; | |
148 | { | |
149 | int write_status, close_status; | |
150 | if (!_IO_file_is_open (fp)) | |
151 | return EOF; | |
152 | ||
6973fc01 | 153 | write_status = _IO_old_do_flush (fp); |
1ea89a40 | 154 | |
77fe0b9c | 155 | INTUSE(_IO_unsave_markers) (fp); |
1ea89a40 UD |
156 | |
157 | close_status = _IO_SYSCLOSE (fp); | |
158 | ||
159 | /* Free buffer. */ | |
77fe0b9c | 160 | INTUSE(_IO_setb) (fp, NULL, NULL, 0); |
1ea89a40 UD |
161 | _IO_setg (fp, NULL, NULL, NULL); |
162 | _IO_setp (fp, NULL, NULL); | |
163 | ||
77fe0b9c | 164 | INTUSE(_IO_un_link) ((struct _IO_FILE_plus *) fp); |
1ea89a40 | 165 | fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; |
110215a9 | 166 | fp->_fileno = -1; |
1ea89a40 UD |
167 | fp->_old_offset = _IO_pos_BAD; |
168 | ||
169 | return close_status ? close_status : write_status; | |
170 | } | |
171 | ||
172 | void | |
4a381a81 | 173 | attribute_compat_text_section |
1ea89a40 UD |
174 | _IO_old_file_finish (fp, dummy) |
175 | _IO_FILE *fp; | |
176 | int dummy; | |
177 | { | |
178 | if (_IO_file_is_open (fp)) | |
179 | { | |
6973fc01 | 180 | _IO_old_do_flush (fp); |
1ea89a40 UD |
181 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) |
182 | _IO_SYSCLOSE (fp); | |
183 | } | |
77fe0b9c | 184 | INTUSE(_IO_default_finish) (fp, 0); |
1ea89a40 UD |
185 | } |
186 | ||
187 | _IO_FILE * | |
4a381a81 | 188 | attribute_compat_text_section |
1ea89a40 UD |
189 | _IO_old_file_fopen (fp, filename, mode) |
190 | _IO_FILE *fp; | |
191 | const char *filename; | |
192 | const char *mode; | |
193 | { | |
194 | int oflags = 0, omode; | |
195 | int read_write, fdesc; | |
196 | int oprot = 0666; | |
197 | if (_IO_file_is_open (fp)) | |
198 | return 0; | |
199 | switch (*mode++) | |
200 | { | |
201 | case 'r': | |
202 | omode = O_RDONLY; | |
203 | read_write = _IO_NO_WRITES; | |
204 | break; | |
205 | case 'w': | |
206 | omode = O_WRONLY; | |
207 | oflags = O_CREAT|O_TRUNC; | |
208 | read_write = _IO_NO_READS; | |
209 | break; | |
210 | case 'a': | |
211 | omode = O_WRONLY; | |
212 | oflags = O_CREAT|O_APPEND; | |
213 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
214 | break; | |
215 | default: | |
216 | __set_errno (EINVAL); | |
217 | return NULL; | |
218 | } | |
219 | if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+')) | |
220 | { | |
221 | omode = O_RDWR; | |
222 | read_write &= _IO_IS_APPENDING; | |
223 | } | |
224 | fdesc = open (filename, omode|oflags, oprot); | |
225 | if (fdesc < 0) | |
226 | return NULL; | |
227 | fp->_fileno = fdesc; | |
228 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
229 | if (read_write & _IO_IS_APPENDING) | |
230 | if (_IO_SEEKOFF (fp, (_IO_off_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT) | |
231 | == _IO_pos_BAD && errno != ESPIPE) | |
232 | return NULL; | |
77fe0b9c | 233 | INTUSE(_IO_link_in) ((struct _IO_FILE_plus *) fp); |
1ea89a40 UD |
234 | return fp; |
235 | } | |
236 | ||
237 | _IO_FILE * | |
4a381a81 | 238 | attribute_compat_text_section |
1ea89a40 UD |
239 | _IO_old_file_attach (fp, fd) |
240 | _IO_FILE *fp; | |
241 | int fd; | |
242 | { | |
243 | if (_IO_file_is_open (fp)) | |
244 | return NULL; | |
245 | fp->_fileno = fd; | |
246 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
247 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
248 | /* Get the current position of the file. */ | |
249 | /* We have to do that since that may be junk. */ | |
250 | fp->_old_offset = _IO_pos_BAD; | |
251 | if (_IO_SEEKOFF (fp, (_IO_off_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) | |
252 | == _IO_pos_BAD && errno != ESPIPE) | |
253 | return NULL; | |
254 | return fp; | |
255 | } | |
256 | ||
257 | _IO_FILE * | |
4a381a81 | 258 | attribute_compat_text_section |
1ea89a40 UD |
259 | _IO_old_file_setbuf (fp, p, len) |
260 | _IO_FILE *fp; | |
261 | char *p; | |
262 | _IO_ssize_t len; | |
263 | { | |
264 | if (_IO_default_setbuf (fp, p, len) == NULL) | |
265 | return NULL; | |
266 | ||
267 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
268 | = fp->_IO_buf_base; | |
269 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
270 | ||
271 | return fp; | |
272 | } | |
273 | ||
11bf311e | 274 | static int old_do_write (_IO_FILE *, const char *, _IO_size_t) __THROW; |
0720f75c | 275 | |
1ea89a40 UD |
276 | /* Write TO_DO bytes from DATA to FP. |
277 | Then mark FP as having empty buffers. */ | |
278 | ||
279 | int | |
4a381a81 | 280 | attribute_compat_text_section |
1ea89a40 UD |
281 | _IO_old_do_write (fp, data, to_do) |
282 | _IO_FILE *fp; | |
283 | const char *data; | |
284 | _IO_size_t to_do; | |
0720f75c | 285 | { |
57b36a0a | 286 | return (to_do == 0 || (_IO_size_t) old_do_write (fp, data, to_do) == to_do) |
0720f75c UD |
287 | ? 0 : EOF; |
288 | } | |
289 | ||
4a381a81 UD |
290 | static int |
291 | attribute_compat_text_section | |
0720f75c UD |
292 | old_do_write (fp, data, to_do) |
293 | _IO_FILE *fp; | |
294 | const char *data; | |
295 | _IO_size_t to_do; | |
1ea89a40 UD |
296 | { |
297 | _IO_size_t count; | |
1ea89a40 UD |
298 | if (fp->_flags & _IO_IS_APPENDING) |
299 | /* On a system without a proper O_APPEND implementation, | |
300 | you would need to sys_seek(0, SEEK_END) here, but is | |
301 | is not needed nor desirable for Unix- or Posix-like systems. | |
302 | Instead, just indicate that offset (before and after) is | |
303 | unpredictable. */ | |
304 | fp->_old_offset = _IO_pos_BAD; | |
305 | else if (fp->_IO_read_end != fp->_IO_write_base) | |
306 | { | |
d64b6ad0 | 307 | _IO_off_t new_pos |
1ea89a40 UD |
308 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
309 | if (new_pos == _IO_pos_BAD) | |
0720f75c | 310 | return 0; |
1ea89a40 UD |
311 | fp->_old_offset = new_pos; |
312 | } | |
313 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 314 | if (fp->_cur_column && count) |
77fe0b9c UD |
315 | fp->_cur_column = INTUSE(_IO_adjust_column) (fp->_cur_column - 1, data, |
316 | count) + 1; | |
1ea89a40 UD |
317 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
318 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; | |
319 | fp->_IO_write_end = ((fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) | |
320 | ? fp->_IO_buf_base : fp->_IO_buf_end); | |
0720f75c | 321 | return count; |
1ea89a40 UD |
322 | } |
323 | ||
324 | int | |
4a381a81 | 325 | attribute_compat_text_section |
1ea89a40 UD |
326 | _IO_old_file_underflow (fp) |
327 | _IO_FILE *fp; | |
328 | { | |
329 | _IO_ssize_t count; | |
330 | #if 0 | |
331 | /* SysV does not make this test; take it out for compatibility */ | |
332 | if (fp->_flags & _IO_EOF_SEEN) | |
333 | return (EOF); | |
334 | #endif | |
335 | ||
336 | if (fp->_flags & _IO_NO_READS) | |
337 | { | |
58034572 | 338 | fp->_flags |= _IO_ERR_SEEN; |
1ea89a40 UD |
339 | __set_errno (EBADF); |
340 | return EOF; | |
341 | } | |
342 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
343 | return *(unsigned char *) fp->_IO_read_ptr; | |
344 | ||
345 | if (fp->_IO_buf_base == NULL) | |
3a90adda AS |
346 | { |
347 | /* Maybe we already have a push back pointer. */ | |
348 | if (fp->_IO_save_base != NULL) | |
349 | { | |
350 | free (fp->_IO_save_base); | |
351 | fp->_flags &= ~_IO_IN_BACKUP; | |
352 | } | |
77fe0b9c | 353 | INTUSE(_IO_doallocbuf) (fp); |
3a90adda | 354 | } |
1ea89a40 UD |
355 | |
356 | /* Flush all line buffered files before reading. */ | |
357 | /* FIXME This can/should be moved to genops ?? */ | |
358 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
77fe0b9c | 359 | INTUSE(_IO_flush_all_linebuffered) (); |
1ea89a40 | 360 | |
77fe0b9c | 361 | INTUSE(_IO_switch_to_get_mode) (fp); |
1ea89a40 UD |
362 | |
363 | /* This is very tricky. We have to adjust those | |
364 | pointers before we call _IO_SYSREAD () since | |
365 | we may longjump () out while waiting for | |
366 | input. Those pointers may be screwed up. H.J. */ | |
367 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
368 | fp->_IO_read_end = fp->_IO_buf_base; | |
369 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
370 | = fp->_IO_buf_base; | |
371 | ||
372 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
373 | fp->_IO_buf_end - fp->_IO_buf_base); | |
374 | if (count <= 0) | |
375 | { | |
376 | if (count == 0) | |
377 | fp->_flags |= _IO_EOF_SEEN; | |
378 | else | |
379 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
380 | } | |
381 | fp->_IO_read_end += count; | |
382 | if (count == 0) | |
383 | return EOF; | |
384 | if (fp->_old_offset != _IO_pos_BAD) | |
385 | _IO_pos_adjust (fp->_old_offset, count); | |
386 | return *(unsigned char *) fp->_IO_read_ptr; | |
387 | } | |
388 | ||
389 | int | |
4a381a81 | 390 | attribute_compat_text_section |
1ea89a40 UD |
391 | _IO_old_file_overflow (f, ch) |
392 | _IO_FILE *f; | |
393 | int ch; | |
394 | { | |
395 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
396 | { | |
397 | f->_flags |= _IO_ERR_SEEN; | |
398 | __set_errno (EBADF); | |
399 | return EOF; | |
400 | } | |
401 | /* If currently reading or no buffer allocated. */ | |
402 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0) | |
403 | { | |
404 | /* Allocate a buffer if needed. */ | |
405 | if (f->_IO_write_base == 0) | |
406 | { | |
77fe0b9c | 407 | INTUSE(_IO_doallocbuf) (f); |
1ea89a40 UD |
408 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
409 | } | |
410 | /* Otherwise must be currently reading. | |
411 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
412 | logically slide the buffer forwards one block (by setting the | |
413 | read pointers to all point at the beginning of the block). This | |
414 | makes room for subsequent output. | |
415 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
416 | alone, so it can continue to correspond to the external position). */ | |
417 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
418 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
419 | f->_IO_write_ptr = f->_IO_read_ptr; | |
420 | f->_IO_write_base = f->_IO_write_ptr; | |
421 | f->_IO_write_end = f->_IO_buf_end; | |
422 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
423 | ||
424 | if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) | |
425 | f->_IO_write_end = f->_IO_write_ptr; | |
426 | f->_flags |= _IO_CURRENTLY_PUTTING; | |
427 | } | |
428 | if (ch == EOF) | |
6973fc01 | 429 | return _IO_old_do_flush (f); |
1ea89a40 | 430 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
6973fc01 | 431 | if (_IO_old_do_flush (f) == EOF) |
1ea89a40 UD |
432 | return EOF; |
433 | *f->_IO_write_ptr++ = ch; | |
434 | if ((f->_flags & _IO_UNBUFFERED) | |
435 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
6973fc01 | 436 | if (_IO_old_do_flush (f) == EOF) |
1ea89a40 UD |
437 | return EOF; |
438 | return (unsigned char) ch; | |
439 | } | |
440 | ||
441 | int | |
4a381a81 | 442 | attribute_compat_text_section |
1ea89a40 UD |
443 | _IO_old_file_sync (fp) |
444 | _IO_FILE *fp; | |
445 | { | |
3a90adda | 446 | _IO_ssize_t delta; |
1ea89a40 UD |
447 | int retval = 0; |
448 | ||
1ea89a40 UD |
449 | /* char* ptr = cur_ptr(); */ |
450 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
6973fc01 | 451 | if (_IO_old_do_flush(fp)) return EOF; |
1ea89a40 UD |
452 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
453 | if (delta != 0) | |
454 | { | |
455 | #ifdef TODO | |
456 | if (_IO_in_backup (fp)) | |
457 | delta -= eGptr () - Gbase (); | |
458 | #endif | |
459 | _IO_off_t new_pos = _IO_SYSSEEK (fp, delta, 1); | |
460 | if (new_pos != (_IO_off_t) EOF) | |
461 | fp->_IO_read_end = fp->_IO_read_ptr; | |
462 | #ifdef ESPIPE | |
463 | else if (errno == ESPIPE) | |
464 | ; /* Ignore error from unseekable devices. */ | |
465 | #endif | |
466 | else | |
467 | retval = EOF; | |
468 | } | |
469 | if (retval != EOF) | |
470 | fp->_old_offset = _IO_pos_BAD; | |
471 | /* FIXME: Cleanup - can this be shared? */ | |
472 | /* setg(base(), ptr, ptr); */ | |
1ea89a40 UD |
473 | return retval; |
474 | } | |
475 | ||
d64b6ad0 | 476 | _IO_off64_t |
4a381a81 | 477 | attribute_compat_text_section |
1ea89a40 UD |
478 | _IO_old_file_seekoff (fp, offset, dir, mode) |
479 | _IO_FILE *fp; | |
480 | _IO_off64_t offset; | |
481 | int dir; | |
482 | int mode; | |
483 | { | |
d64b6ad0 | 484 | _IO_off_t result; |
1ea89a40 UD |
485 | _IO_off64_t delta, new_offset; |
486 | long count; | |
487 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file | |
488 | offset of the underlying file must be exact. */ | |
489 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
490 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
491 | ||
492 | if (mode == 0) | |
493 | dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */ | |
494 | ||
495 | /* Flush unwritten characters. | |
496 | (This may do an unneeded write if we seek within the buffer. | |
497 | But to be able to switch to reading, we would need to set | |
498 | egptr to ptr. That can't be done in the current design, | |
499 | which assumes file_ptr() is eGptr. Anyway, since we probably | |
500 | end up flushing when we close(), it doesn't make much difference.) | |
501 | FIXME: simulate mem-papped files. */ | |
502 | ||
503 | if (fp->_IO_write_ptr > fp->_IO_write_base || _IO_in_put_mode (fp)) | |
77fe0b9c | 504 | if (INTUSE(_IO_switch_to_get_mode) (fp)) |
1ea89a40 UD |
505 | return EOF; |
506 | ||
507 | if (fp->_IO_buf_base == NULL) | |
508 | { | |
3a90adda AS |
509 | /* It could be that we already have a pushback buffer. */ |
510 | if (fp->_IO_read_base != NULL) | |
511 | { | |
512 | free (fp->_IO_read_base); | |
513 | fp->_flags &= ~_IO_IN_BACKUP; | |
514 | } | |
77fe0b9c | 515 | INTUSE(_IO_doallocbuf) (fp); |
1ea89a40 UD |
516 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
517 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
518 | } | |
519 | ||
520 | switch (dir) | |
521 | { | |
522 | case _IO_seek_cur: | |
523 | /* Adjust for read-ahead (bytes is buffer). */ | |
524 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
525 | if (fp->_old_offset == _IO_pos_BAD) | |
526 | goto dumb; | |
527 | /* Make offset absolute, assuming current pointer is file_ptr(). */ | |
d64b6ad0 | 528 | offset += fp->_old_offset; |
1ea89a40 UD |
529 | |
530 | dir = _IO_seek_set; | |
531 | break; | |
532 | case _IO_seek_set: | |
533 | break; | |
534 | case _IO_seek_end: | |
535 | { | |
8619129f | 536 | struct _G_stat64 st; |
1ea89a40 UD |
537 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
538 | { | |
539 | offset += st.st_size; | |
540 | dir = _IO_seek_set; | |
541 | } | |
542 | else | |
543 | goto dumb; | |
544 | } | |
545 | } | |
546 | /* At this point, dir==_IO_seek_set. */ | |
547 | ||
3a90adda AS |
548 | /* If we are only interested in the current position we've found it now. */ |
549 | if (mode == 0) | |
550 | return offset; | |
551 | ||
1ea89a40 UD |
552 | /* If destination is within current buffer, optimize: */ |
553 | if (fp->_old_offset != _IO_pos_BAD && fp->_IO_read_base != NULL | |
554 | && !_IO_in_backup (fp)) | |
555 | { | |
556 | /* Offset relative to start of main get area. */ | |
d64b6ad0 | 557 | _IO_off_t rel_offset = (offset - fp->_old_offset |
1ea89a40 UD |
558 | + (fp->_IO_read_end - fp->_IO_read_base)); |
559 | if (rel_offset >= 0) | |
560 | { | |
561 | #if 0 | |
562 | if (_IO_in_backup (fp)) | |
563 | _IO_switch_to_main_get_area (fp); | |
564 | #endif | |
565 | if (rel_offset <= fp->_IO_read_end - fp->_IO_read_base) | |
566 | { | |
567 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + rel_offset, | |
568 | fp->_IO_read_end); | |
569 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
3a90adda AS |
570 | { |
571 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
572 | goto resync; | |
573 | } | |
1ea89a40 UD |
574 | } |
575 | #ifdef TODO | |
576 | /* If we have streammarkers, seek forward by reading ahead. */ | |
577 | if (_IO_have_markers (fp)) | |
578 | { | |
579 | int to_skip = rel_offset | |
580 | - (fp->_IO_read_ptr - fp->_IO_read_base); | |
581 | if (ignore (to_skip) != to_skip) | |
582 | goto dumb; | |
3a90adda | 583 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 584 | goto resync; |
1ea89a40 UD |
585 | } |
586 | #endif | |
587 | } | |
588 | #ifdef TODO | |
589 | if (rel_offset < 0 && rel_offset >= Bbase () - Bptr ()) | |
590 | { | |
591 | if (!_IO_in_backup (fp)) | |
592 | _IO_switch_to_backup_area (fp); | |
593 | gbump (fp->_IO_read_end + rel_offset - fp->_IO_read_ptr); | |
3a90adda | 594 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 595 | goto resync; |
1ea89a40 UD |
596 | } |
597 | #endif | |
598 | } | |
599 | ||
600 | #ifdef TODO | |
77fe0b9c | 601 | INTUSE(_IO_unsave_markers) (fp); |
1ea89a40 UD |
602 | #endif |
603 | ||
604 | if (fp->_flags & _IO_NO_READS) | |
605 | goto dumb; | |
606 | ||
607 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
608 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
609 | delta = offset - new_offset; | |
610 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
611 | { | |
612 | new_offset = offset; | |
613 | delta = 0; | |
614 | } | |
615 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
616 | if (result < 0) | |
617 | return EOF; | |
618 | if (delta == 0) | |
619 | count = 0; | |
620 | else | |
621 | { | |
622 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
623 | (must_be_exact | |
624 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
625 | if (count < delta) | |
626 | { | |
627 | /* We weren't allowed to read, but try to seek the remainder. */ | |
628 | offset = count == EOF ? delta : delta-count; | |
629 | dir = _IO_seek_cur; | |
630 | goto dumb; | |
631 | } | |
632 | } | |
633 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, | |
634 | fp->_IO_buf_base + count); | |
635 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
636 | fp->_old_offset = result + count; | |
637 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
638 | return offset; | |
639 | dumb: | |
640 | ||
77fe0b9c | 641 | INTUSE(_IO_unsave_markers) (fp); |
1ea89a40 UD |
642 | result = _IO_SYSSEEK (fp, offset, dir); |
643 | if (result != EOF) | |
1ddf537f UD |
644 | { |
645 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
646 | fp->_old_offset = result; | |
647 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
648 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
649 | } | |
1ea89a40 | 650 | return result; |
4a582094 UD |
651 | |
652 | resync: | |
653 | /* We need to do it since it is possible that the file offset in | |
654 | the kernel may be changed behind our back. It may happen when | |
655 | we fopen a file and then do a fork. One process may access the | |
656 | the file and the kernel file offset will be changed. */ | |
657 | if (fp->_old_offset >= 0) | |
658 | _IO_SYSSEEK (fp, fp->_old_offset, 0); | |
659 | ||
660 | return offset; | |
1ea89a40 UD |
661 | } |
662 | ||
663 | _IO_ssize_t | |
4a381a81 | 664 | attribute_compat_text_section |
1ea89a40 UD |
665 | _IO_old_file_write (f, data, n) |
666 | _IO_FILE *f; | |
667 | const void *data; | |
668 | _IO_ssize_t n; | |
669 | { | |
670 | _IO_ssize_t to_do = n; | |
671 | while (to_do > 0) | |
672 | { | |
673 | _IO_ssize_t count = write (f->_fileno, data, to_do); | |
674 | if (count == EOF) | |
675 | { | |
676 | f->_flags |= _IO_ERR_SEEN; | |
677 | break; | |
678 | } | |
679 | to_do -= count; | |
680 | data = (void *) ((char *) data + count); | |
681 | } | |
682 | n -= to_do; | |
683 | if (f->_old_offset >= 0) | |
684 | f->_old_offset += n; | |
685 | return n; | |
686 | } | |
687 | ||
688 | _IO_size_t | |
4a381a81 | 689 | attribute_compat_text_section |
1ea89a40 UD |
690 | _IO_old_file_xsputn (f, data, n) |
691 | _IO_FILE *f; | |
692 | const void *data; | |
693 | _IO_size_t n; | |
694 | { | |
695 | register const char *s = (char *) data; | |
696 | _IO_size_t to_do = n; | |
697 | int must_flush = 0; | |
cae6ebb2 | 698 | _IO_size_t count = 0; |
1ea89a40 UD |
699 | |
700 | if (n <= 0) | |
701 | return 0; | |
702 | /* This is an optimized implementation. | |
703 | If the amount to be written straddles a block boundary | |
704 | (or the filebuf is unbuffered), use sys_write directly. */ | |
705 | ||
706 | /* First figure out how much space is available in the buffer. */ | |
1ea89a40 UD |
707 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) |
708 | { | |
709 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
710 | if (count >= n) | |
711 | { | |
712 | register const char *p; | |
713 | for (p = s + n; p > s; ) | |
714 | { | |
715 | if (*--p == '\n') | |
716 | { | |
717 | count = p - s + 1; | |
718 | must_flush = 1; | |
719 | break; | |
720 | } | |
721 | } | |
722 | } | |
723 | } | |
cae6ebb2 UD |
724 | else if (f->_IO_write_end > f->_IO_write_ptr) |
725 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ | |
726 | ||
1ea89a40 UD |
727 | /* Then fill the buffer. */ |
728 | if (count > 0) | |
729 | { | |
730 | if (count > to_do) | |
731 | count = to_do; | |
732 | if (count > 20) | |
733 | { | |
3a90adda AS |
734 | #ifdef _LIBC |
735 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); | |
736 | #else | |
1ea89a40 | 737 | memcpy (f->_IO_write_ptr, s, count); |
3a90adda AS |
738 | f->_IO_write_ptr += count; |
739 | #endif | |
1ea89a40 UD |
740 | s += count; |
741 | } | |
742 | else | |
743 | { | |
744 | register char *p = f->_IO_write_ptr; | |
745 | register int i = (int) count; | |
746 | while (--i >= 0) | |
747 | *p++ = *s++; | |
3a90adda | 748 | f->_IO_write_ptr = p; |
1ea89a40 | 749 | } |
1ea89a40 UD |
750 | to_do -= count; |
751 | } | |
752 | if (to_do + must_flush > 0) | |
753 | { | |
0720f75c | 754 | _IO_size_t block_size, do_write; |
1ea89a40 UD |
755 | /* Next flush the (full) buffer. */ |
756 | if (__overflow (f, EOF) == EOF) | |
5d1d7adb | 757 | return to_do == 0 ? EOF : n - to_do; |
1ea89a40 UD |
758 | |
759 | /* Try to maintain alignment: write a whole number of blocks. | |
760 | dont_write is what gets left over. */ | |
761 | block_size = f->_IO_buf_end - f->_IO_buf_base; | |
0720f75c UD |
762 | do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); |
763 | ||
764 | if (do_write) | |
765 | { | |
766 | count = old_do_write (f, s, do_write); | |
767 | to_do -= count; | |
768 | if (count < do_write) | |
769 | return n - to_do; | |
770 | } | |
1ea89a40 UD |
771 | |
772 | /* Now write out the remainder. Normally, this will fit in the | |
773 | buffer, but it's somewhat messier for line-buffered files, | |
774 | so we let _IO_default_xsputn handle the general case. */ | |
0720f75c | 775 | if (to_do) |
77fe0b9c | 776 | to_do -= INTUSE(_IO_default_xsputn) (f, s+do_write, to_do); |
1ea89a40 UD |
777 | } |
778 | return n - to_do; | |
779 | } | |
780 | ||
781 | ||
b2637a22 | 782 | const struct _IO_jump_t _IO_old_file_jumps = |
1ea89a40 UD |
783 | { |
784 | JUMP_INIT_DUMMY, | |
785 | JUMP_INIT(finish, _IO_old_file_finish), | |
786 | JUMP_INIT(overflow, _IO_old_file_overflow), | |
787 | JUMP_INIT(underflow, _IO_old_file_underflow), | |
77fe0b9c UD |
788 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), |
789 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
1ea89a40 | 790 | JUMP_INIT(xsputn, _IO_old_file_xsputn), |
77fe0b9c | 791 | JUMP_INIT(xsgetn, INTUSE(_IO_default_xsgetn)), |
1ea89a40 UD |
792 | JUMP_INIT(seekoff, _IO_old_file_seekoff), |
793 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
794 | JUMP_INIT(setbuf, _IO_old_file_setbuf), | |
86187531 | 795 | JUMP_INIT(sync, _IO_old_file_sync), |
77fe0b9c UD |
796 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), |
797 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
86187531 | 798 | JUMP_INIT(write, _IO_old_file_write), |
77fe0b9c UD |
799 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), |
800 | JUMP_INIT(close, INTUSE(_IO_file_close)), | |
801 | JUMP_INIT(stat, INTUSE(_IO_file_stat)) | |
1ea89a40 UD |
802 | }; |
803 | ||
16710d58 RM |
804 | compat_symbol (libc, _IO_old_do_write, _IO_do_write, GLIBC_2_0); |
805 | compat_symbol (libc, _IO_old_file_attach, _IO_file_attach, GLIBC_2_0); | |
806 | compat_symbol (libc, _IO_old_file_close_it, _IO_file_close_it, GLIBC_2_0); | |
807 | compat_symbol (libc, _IO_old_file_finish, _IO_file_finish, GLIBC_2_0); | |
808 | compat_symbol (libc, _IO_old_file_fopen, _IO_file_fopen, GLIBC_2_0); | |
809 | compat_symbol (libc, _IO_old_file_init, _IO_file_init, GLIBC_2_0); | |
810 | compat_symbol (libc, _IO_old_file_setbuf, _IO_file_setbuf, GLIBC_2_0); | |
811 | compat_symbol (libc, _IO_old_file_sync, _IO_file_sync, GLIBC_2_0); | |
812 | compat_symbol (libc, _IO_old_file_overflow, _IO_file_overflow, GLIBC_2_0); | |
813 | compat_symbol (libc, _IO_old_file_seekoff, _IO_file_seekoff, GLIBC_2_0); | |
814 | compat_symbol (libc, _IO_old_file_underflow, _IO_file_underflow, GLIBC_2_0); | |
815 | compat_symbol (libc, _IO_old_file_write, _IO_file_write, GLIBC_2_0); | |
816 | compat_symbol (libc, _IO_old_file_xsputn, _IO_file_xsputn, GLIBC_2_0); | |
817 | ||
818 | #endif |