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a334319f | 1 | /* Copyright (C) 1993, 1995, 1997-2003, 2004 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
40a55d20 | 3 | Written by Per Bothner <bothner@cygnus.com>. |
96aa2d94 | 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. | |
96aa2d94 | 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 | |
40a55d20 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 13 | Lesser General Public License for more details. |
96aa2d94 | 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. | |
96aa2d94 | 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. */ | |
96aa2d94 | 28 | |
96aa2d94 | 29 | |
fa0bc87c RM |
30 | #ifndef _POSIX_SOURCE |
31 | # define _POSIX_SOURCE | |
32 | #endif | |
96aa2d94 | 33 | #include "libioP.h" |
129d706d | 34 | #include <assert.h> |
96aa2d94 | 35 | #include <fcntl.h> |
284749da | 36 | #include <sys/param.h> |
96aa2d94 RM |
37 | #include <sys/types.h> |
38 | #include <sys/stat.h> | |
39 | #include <string.h> | |
40 | #include <errno.h> | |
c9f10034 | 41 | #include <unistd.h> |
00bc5db0 UD |
42 | #ifdef __STDC__ |
43 | #include <stdlib.h> | |
44 | #endif | |
4e2e9999 UD |
45 | #if _LIBC |
46 | # include "../wcsmbs/wcsmbsload.h" | |
129d706d UD |
47 | # include "../iconv/gconv_charset.h" |
48 | # include "../iconv/gconv_int.h" | |
0bf98029 | 49 | # include <shlib-compat.h> |
73299943 | 50 | # include <not-cancel.h> |
4e2e9999 | 51 | #endif |
96aa2d94 RM |
52 | #ifndef errno |
53 | extern int errno; | |
54 | #endif | |
4547c1a4 UD |
55 | #ifndef __set_errno |
56 | # define __set_errno(Val) errno = (Val) | |
57 | #endif | |
96aa2d94 | 58 | |
68dbb3a6 UD |
59 | |
60 | #ifdef _LIBC | |
61eb22d3 | 61 | # define open(Name, Flags, Prot) __open (Name, Flags, Prot) |
61eb22d3 UD |
62 | # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) |
63 | # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) | |
64 | # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) | |
4483f2c0 | 65 | # define _IO_do_write _IO_new_do_write /* For macro uses. */ |
4ab6f47c | 66 | # define _IO_file_close_it _IO_new_file_close_it |
319d719d UD |
67 | #else |
68 | # define _IO_new_do_write _IO_do_write | |
69 | # define _IO_new_file_attach _IO_file_attach | |
70 | # define _IO_new_file_close_it _IO_file_close_it | |
71 | # define _IO_new_file_finish _IO_file_finish | |
72 | # define _IO_new_file_fopen _IO_file_fopen | |
73 | # define _IO_new_file_init _IO_file_init | |
74 | # define _IO_new_file_setbuf _IO_file_setbuf | |
75 | # define _IO_new_file_sync _IO_file_sync | |
76 | # define _IO_new_file_overflow _IO_file_overflow | |
77 | # define _IO_new_file_seekoff _IO_file_seekoff | |
78 | # define _IO_new_file_underflow _IO_file_underflow | |
79 | # define _IO_new_file_write _IO_file_write | |
80 | # define _IO_new_file_xsputn _IO_file_xsputn | |
68dbb3a6 UD |
81 | #endif |
82 | ||
129d706d UD |
83 | |
84 | #ifdef _LIBC | |
ab26a24a | 85 | extern struct __gconv_trans_data __libio_translit attribute_hidden; |
129d706d UD |
86 | #endif |
87 | ||
88 | ||
96aa2d94 RM |
89 | /* An fstream can be in at most one of put mode, get mode, or putback mode. |
90 | Putback mode is a variant of get mode. | |
91 | ||
92 | In a filebuf, there is only one current position, instead of two | |
6d52618b | 93 | separate get and put pointers. In get mode, the current position |
96aa2d94 RM |
94 | is that of gptr(); in put mode that of pptr(). |
95 | ||
96 | The position in the buffer that corresponds to the position | |
a18f587d UD |
97 | in external file system is normally _IO_read_end, except in putback |
98 | mode, when it is _IO_save_end. | |
96aa2d94 RM |
99 | If the field _fb._offset is >= 0, it gives the offset in |
100 | the file as a whole corresponding to eGptr(). (?) | |
101 | ||
102 | PUT MODE: | |
a18f587d UD |
103 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, |
104 | and _IO_read_base are equal to each other. These are usually equal | |
105 | to _IO_buf_base, though not necessarily if we have switched from | |
106 | get mode to put mode. (The reason is to maintain the invariant | |
107 | that _IO_read_end corresponds to the external file position.) | |
108 | _IO_write_base is non-NULL and usually equal to _IO_base_base. | |
109 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. | |
110 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
111 | ||
96aa2d94 RM |
112 | GET MODE: |
113 | If a filebuf is in get or putback mode, eback() != egptr(). | |
114 | In get mode, the unread characters are between gptr() and egptr(). | |
115 | The OS file position corresponds to that of egptr(). | |
a18f587d | 116 | |
96aa2d94 RM |
117 | PUTBACK MODE: |
118 | Putback mode is used to remember "excess" characters that have | |
119 | been sputbackc'd in a separate putback buffer. | |
120 | In putback mode, the get buffer points to the special putback buffer. | |
121 | The unread characters are the characters between gptr() and egptr() | |
122 | in the putback buffer, as well as the area between save_gptr() | |
123 | and save_egptr(), which point into the original reserve buffer. | |
124 | (The pointers save_gptr() and save_egptr() are the values | |
125 | of gptr() and egptr() at the time putback mode was entered.) | |
126 | The OS position corresponds to that of save_egptr(). | |
23396375 | 127 | |
96aa2d94 | 128 | LINE BUFFERED OUTPUT: |
a18f587d | 129 | During line buffered output, _IO_write_base==base() && epptr()==base(). |
96aa2d94 RM |
130 | However, ptr() may be anywhere between base() and ebuf(). |
131 | This forces a call to filebuf::overflow(int C) on every put. | |
132 | If there is more space in the buffer, and C is not a '\n', | |
133 | then C is inserted, and pptr() incremented. | |
23396375 | 134 | |
96aa2d94 RM |
135 | UNBUFFERED STREAMS: |
136 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
137 | */ | |
138 | ||
139 | #define CLOSED_FILEBUF_FLAGS \ | |
140 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
141 | ||
142 | ||
143 | void | |
b259e746 | 144 | _IO_new_file_init (fp) |
2ca8b1ee | 145 | struct _IO_FILE_plus *fp; |
96aa2d94 RM |
146 | { |
147 | /* POSIX.1 allows another file handle to be used to change the position | |
148 | of our file descriptor. Hence we actually don't know the actual | |
149 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
150 | fp->file._offset = _IO_pos_BAD; |
151 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
96aa2d94 | 152 | |
77fe0b9c | 153 | INTUSE(_IO_link_in) (fp); |
2ca8b1ee | 154 | fp->file._fileno = -1; |
96aa2d94 | 155 | } |
77fe0b9c | 156 | INTDEF2(_IO_new_file_init, _IO_file_init) |
96aa2d94 RM |
157 | |
158 | int | |
b259e746 | 159 | _IO_new_file_close_it (fp) |
40a55d20 | 160 | _IO_FILE *fp; |
96aa2d94 | 161 | { |
fa0bc87c | 162 | int write_status, close_status; |
40a55d20 | 163 | if (!_IO_file_is_open (fp)) |
96aa2d94 RM |
164 | return EOF; |
165 | ||
3384a8d6 UD |
166 | if ((fp->_flags & _IO_NO_WRITES) == 0 |
167 | && (fp->_flags & _IO_CURRENTLY_PUTTING) != 0) | |
168 | write_status = _IO_do_flush (fp); | |
169 | else | |
170 | write_status = 0; | |
96aa2d94 | 171 | |
77fe0b9c | 172 | INTUSE(_IO_unsave_markers) (fp); |
96aa2d94 RM |
173 | |
174 | close_status = _IO_SYSCLOSE (fp); | |
175 | ||
176 | /* Free buffer. */ | |
a334319f UD |
177 | if (fp->_mode <= 0) |
178 | { | |
179 | INTUSE(_IO_setb) (fp, NULL, NULL, 0); | |
180 | _IO_setg (fp, NULL, NULL, NULL); | |
181 | _IO_setp (fp, NULL, NULL); | |
182 | } | |
319d719d | 183 | #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
a334319f | 184 | else |
d64b6ad0 | 185 | { |
44c4ccbc UD |
186 | if (_IO_have_wbackup (fp)) |
187 | INTUSE(_IO_free_wbackup_area) (fp); | |
77fe0b9c | 188 | INTUSE(_IO_wsetb) (fp, NULL, NULL, 0); |
d64b6ad0 UD |
189 | _IO_wsetg (fp, NULL, NULL, NULL); |
190 | _IO_wsetp (fp, NULL, NULL); | |
191 | } | |
319d719d | 192 | #endif |
96aa2d94 | 193 | |
77fe0b9c | 194 | INTUSE(_IO_un_link) ((struct _IO_FILE_plus *) fp); |
96aa2d94 | 195 | fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; |
110215a9 | 196 | fp->_fileno = -1; |
bd355af0 | 197 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 198 | |
fa0bc87c | 199 | return close_status ? close_status : write_status; |
96aa2d94 | 200 | } |
77fe0b9c | 201 | INTDEF2(_IO_new_file_close_it, _IO_file_close_it) |
96aa2d94 RM |
202 | |
203 | void | |
b259e746 | 204 | _IO_new_file_finish (fp, dummy) |
40a55d20 UD |
205 | _IO_FILE *fp; |
206 | int dummy; | |
96aa2d94 | 207 | { |
40a55d20 | 208 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
209 | { |
210 | _IO_do_flush (fp); | |
211 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) | |
212 | _IO_SYSCLOSE (fp); | |
213 | } | |
77fe0b9c | 214 | INTUSE(_IO_default_finish) (fp, 0); |
96aa2d94 | 215 | } |
77fe0b9c | 216 | INTDEF2(_IO_new_file_finish, _IO_file_finish) |
96aa2d94 | 217 | |
bd355af0 UD |
218 | _IO_FILE * |
219 | _IO_file_open (fp, filename, posix_mode, prot, read_write, is32not64) | |
220 | _IO_FILE *fp; | |
221 | const char *filename; | |
222 | int posix_mode; | |
223 | int prot; | |
224 | int read_write; | |
225 | int is32not64; | |
226 | { | |
227 | int fdesc; | |
ee8449f7 | 228 | #ifdef _LIBC |
e3c54d80 | 229 | if (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0)) |
ee8449f7 UD |
230 | fdesc = open_not_cancel (filename, |
231 | posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
232 | else | |
233 | fdesc = open (filename, posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
bd355af0 UD |
234 | #else |
235 | fdesc = open (filename, posix_mode, prot); | |
236 | #endif | |
237 | if (fdesc < 0) | |
238 | return NULL; | |
239 | fp->_fileno = fdesc; | |
240 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
c096ab25 | 241 | if ((read_write & _IO_IS_APPENDING) && (read_write & _IO_NO_READS)) |
bd355af0 UD |
242 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT) |
243 | == _IO_pos_BAD && errno != ESPIPE) | |
2c617417 | 244 | { |
e3c54d80 | 245 | close_not_cancel (fdesc); |
2c617417 UD |
246 | return NULL; |
247 | } | |
77fe0b9c | 248 | INTUSE(_IO_link_in) ((struct _IO_FILE_plus *) fp); |
bd355af0 UD |
249 | return fp; |
250 | } | |
ee2a5ae8 | 251 | libc_hidden_def (_IO_file_open) |
bd355af0 | 252 | |
96aa2d94 | 253 | _IO_FILE * |
b259e746 | 254 | _IO_new_file_fopen (fp, filename, mode, is32not64) |
40a55d20 UD |
255 | _IO_FILE *fp; |
256 | const char *filename; | |
257 | const char *mode; | |
dfd2257a | 258 | int is32not64; |
96aa2d94 RM |
259 | { |
260 | int oflags = 0, omode; | |
bd355af0 | 261 | int read_write; |
96aa2d94 | 262 | int oprot = 0666; |
f38931a9 | 263 | int i; |
4e2e9999 | 264 | _IO_FILE *result; |
129d706d | 265 | #ifdef _LIBC |
4e2e9999 | 266 | const char *cs; |
129d706d | 267 | const char *last_recognized; |
4e2e9999 UD |
268 | #endif |
269 | ||
96aa2d94 RM |
270 | if (_IO_file_is_open (fp)) |
271 | return 0; | |
f38931a9 | 272 | switch (*mode) |
40a55d20 UD |
273 | { |
274 | case 'r': | |
275 | omode = O_RDONLY; | |
276 | read_write = _IO_NO_WRITES; | |
277 | break; | |
278 | case 'w': | |
279 | omode = O_WRONLY; | |
280 | oflags = O_CREAT|O_TRUNC; | |
281 | read_write = _IO_NO_READS; | |
282 | break; | |
283 | case 'a': | |
284 | omode = O_WRONLY; | |
285 | oflags = O_CREAT|O_APPEND; | |
286 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
287 | break; | |
288 | default: | |
289 | __set_errno (EINVAL); | |
290 | return NULL; | |
291 | } | |
129d706d UD |
292 | #ifdef _LIBC |
293 | last_recognized = mode; | |
294 | #endif | |
e3c54d80 | 295 | for (i = 1; i < 6; ++i) |
40a55d20 | 296 | { |
f38931a9 UD |
297 | switch (*++mode) |
298 | { | |
299 | case '\0': | |
300 | break; | |
301 | case '+': | |
302 | omode = O_RDWR; | |
303 | read_write &= _IO_IS_APPENDING; | |
129d706d UD |
304 | #ifdef _LIBC |
305 | last_recognized = mode; | |
306 | #endif | |
f38931a9 UD |
307 | continue; |
308 | case 'x': | |
309 | oflags |= O_EXCL; | |
129d706d UD |
310 | #ifdef _LIBC |
311 | last_recognized = mode; | |
312 | #endif | |
f38931a9 UD |
313 | continue; |
314 | case 'b': | |
129d706d UD |
315 | #ifdef _LIBC |
316 | last_recognized = mode; | |
317 | #endif | |
b7fc6d07 UD |
318 | continue; |
319 | case 'm': | |
320 | fp->_flags2 |= _IO_FLAGS2_MMAP; | |
321 | continue; | |
ee8449f7 UD |
322 | case 'c': |
323 | fp->_flags2 |= _IO_FLAGS2_NOTCANCEL; | |
324 | break; | |
f38931a9 UD |
325 | default: |
326 | /* Ignore. */ | |
327 | continue; | |
328 | } | |
329 | break; | |
40a55d20 | 330 | } |
f38931a9 | 331 | |
4e2e9999 UD |
332 | result = _IO_file_open (fp, filename, omode|oflags, oprot, read_write, |
333 | is32not64); | |
334 | ||
335 | ||
129d706d UD |
336 | #ifdef _LIBC |
337 | if (result != NULL) | |
4e2e9999 | 338 | { |
129d706d UD |
339 | /* Test whether the mode string specifies the conversion. */ |
340 | cs = strstr (last_recognized + 1, ",ccs="); | |
341 | if (cs != NULL) | |
342 | { | |
343 | /* Yep. Load the appropriate conversions and set the orientation | |
344 | to wide. */ | |
345 | struct gconv_fcts fcts; | |
346 | struct _IO_codecvt *cc; | |
347 | char *endp = __strchrnul (cs + 5, ','); | |
348 | char ccs[endp - (cs + 5) + 3]; | |
349 | ||
350 | *((char *) __mempcpy (ccs, cs + 5, endp - (cs + 5))) = '\0'; | |
351 | strip (ccs, ccs); | |
352 | ||
353 | if (__wcsmbs_named_conv (&fcts, ccs[2] == '\0' | |
354 | ? upstr (ccs, cs + 5) : ccs) != 0) | |
355 | { | |
356 | /* Something went wrong, we cannot load the conversion modules. | |
357 | This means we cannot proceed since the user explicitly asked | |
358 | for these. */ | |
1739d268 | 359 | (void) INTUSE(_IO_file_close_it) (fp); |
129d706d UD |
360 | __set_errno (EINVAL); |
361 | return NULL; | |
362 | } | |
363 | ||
364 | assert (fcts.towc_nsteps == 1); | |
365 | assert (fcts.tomb_nsteps == 1); | |
366 | ||
367 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
368 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; | |
369 | ||
370 | /* Clear the state. We start all over again. */ | |
371 | memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t)); | |
372 | memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t)); | |
373 | ||
374 | cc = fp->_codecvt = &fp->_wide_data->_codecvt; | |
375 | ||
376 | /* The functions are always the same. */ | |
377 | *cc = __libio_codecvt; | |
378 | ||
379 | cc->__cd_in.__cd.__nsteps = fcts.towc_nsteps; | |
380 | cc->__cd_in.__cd.__steps = fcts.towc; | |
381 | ||
382 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0; | |
383 | cc->__cd_in.__cd.__data[0].__internal_use = 1; | |
384 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
385 | cc->__cd_in.__cd.__data[0].__statep = &result->_wide_data->_IO_state; | |
386 | ||
387 | /* XXX For now no transliteration. */ | |
388 | cc->__cd_in.__cd.__data[0].__trans = NULL; | |
389 | ||
390 | cc->__cd_out.__cd.__nsteps = fcts.tomb_nsteps; | |
391 | cc->__cd_out.__cd.__steps = fcts.tomb; | |
392 | ||
393 | cc->__cd_out.__cd.__data[0].__invocation_counter = 0; | |
394 | cc->__cd_out.__cd.__data[0].__internal_use = 1; | |
395 | cc->__cd_out.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
396 | cc->__cd_out.__cd.__data[0].__statep = | |
397 | &result->_wide_data->_IO_state; | |
398 | ||
399 | /* And now the transliteration. */ | |
400 | cc->__cd_out.__cd.__data[0].__trans = &__libio_translit; | |
401 | ||
402 | /* Set the mode now. */ | |
403 | result->_mode = 1; | |
129d706d | 404 | } |
4e2e9999 UD |
405 | } |
406 | #endif /* GNU libc */ | |
407 | ||
408 | return result; | |
96aa2d94 | 409 | } |
77fe0b9c | 410 | INTDEF2(_IO_new_file_fopen, _IO_file_fopen) |
96aa2d94 | 411 | |
40a55d20 | 412 | _IO_FILE * |
b259e746 | 413 | _IO_new_file_attach (fp, fd) |
40a55d20 UD |
414 | _IO_FILE *fp; |
415 | int fd; | |
96aa2d94 | 416 | { |
40a55d20 | 417 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
418 | return NULL; |
419 | fp->_fileno = fd; | |
420 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
421 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
f65fd747 UD |
422 | /* Get the current position of the file. */ |
423 | /* We have to do that since that may be junk. */ | |
bd355af0 | 424 | fp->_offset = _IO_pos_BAD; |
dfd2257a | 425 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) |
f65fd747 UD |
426 | == _IO_pos_BAD && errno != ESPIPE) |
427 | return NULL; | |
96aa2d94 RM |
428 | return fp; |
429 | } | |
77fe0b9c | 430 | INTDEF2(_IO_new_file_attach, _IO_file_attach) |
96aa2d94 | 431 | |
40a55d20 | 432 | _IO_FILE * |
b259e746 | 433 | _IO_new_file_setbuf (fp, p, len) |
40a55d20 UD |
434 | _IO_FILE *fp; |
435 | char *p; | |
436 | _IO_ssize_t len; | |
96aa2d94 | 437 | { |
d64b6ad0 UD |
438 | if (_IO_default_setbuf (fp, p, len) == NULL) |
439 | return NULL; | |
96aa2d94 | 440 | |
d64b6ad0 UD |
441 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end |
442 | = fp->_IO_buf_base; | |
443 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 | 444 | |
d64b6ad0 | 445 | return fp; |
96aa2d94 | 446 | } |
77fe0b9c | 447 | INTDEF2(_IO_new_file_setbuf, _IO_file_setbuf) |
96aa2d94 | 448 | |
bff334e0 UD |
449 | |
450 | _IO_FILE * | |
451 | _IO_file_setbuf_mmap (fp, p, len) | |
452 | _IO_FILE *fp; | |
453 | char *p; | |
454 | _IO_ssize_t len; | |
455 | { | |
456 | _IO_FILE *result; | |
457 | ||
458 | /* Change the function table. */ | |
15a686af | 459 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
bff334e0 UD |
460 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
461 | ||
462 | /* And perform the normal operation. */ | |
463 | result = _IO_new_file_setbuf (fp, p, len); | |
464 | ||
465 | /* If the call failed, restore to using mmap. */ | |
466 | if (result == NULL) | |
467 | { | |
468 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap; | |
469 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
470 | } | |
471 | ||
472 | return result; | |
473 | } | |
474 | ||
a334319f | 475 | static _IO_size_t new_do_write (_IO_FILE *, const char *, _IO_size_t) __THROW; |
0720f75c | 476 | |
96aa2d94 | 477 | /* Write TO_DO bytes from DATA to FP. |
68dbb3a6 | 478 | Then mark FP as having empty buffers. */ |
96aa2d94 RM |
479 | |
480 | int | |
b259e746 | 481 | _IO_new_do_write (fp, data, to_do) |
40a55d20 UD |
482 | _IO_FILE *fp; |
483 | const char *data; | |
484 | _IO_size_t to_do; | |
0720f75c | 485 | { |
6dd67bd5 UD |
486 | return (to_do == 0 |
487 | || (_IO_size_t) new_do_write (fp, data, to_do) == to_do) ? 0 : EOF; | |
0720f75c | 488 | } |
77fe0b9c | 489 | INTDEF2(_IO_new_do_write, _IO_do_write) |
0720f75c UD |
490 | |
491 | static | |
ccf3ea43 | 492 | _IO_size_t |
0720f75c UD |
493 | new_do_write (fp, data, to_do) |
494 | _IO_FILE *fp; | |
495 | const char *data; | |
496 | _IO_size_t to_do; | |
96aa2d94 RM |
497 | { |
498 | _IO_size_t count; | |
96aa2d94 RM |
499 | if (fp->_flags & _IO_IS_APPENDING) |
500 | /* On a system without a proper O_APPEND implementation, | |
501 | you would need to sys_seek(0, SEEK_END) here, but is | |
502 | is not needed nor desirable for Unix- or Posix-like systems. | |
503 | Instead, just indicate that offset (before and after) is | |
504 | unpredictable. */ | |
bd355af0 | 505 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 506 | else if (fp->_IO_read_end != fp->_IO_write_base) |
23396375 | 507 | { |
d64b6ad0 | 508 | _IO_off64_t new_pos |
40a55d20 | 509 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
96aa2d94 | 510 | if (new_pos == _IO_pos_BAD) |
0720f75c | 511 | return 0; |
bd355af0 | 512 | fp->_offset = new_pos; |
96aa2d94 RM |
513 | } |
514 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 515 | if (fp->_cur_column && count) |
77fe0b9c UD |
516 | fp->_cur_column = INTUSE(_IO_adjust_column) (fp->_cur_column - 1, data, |
517 | count) + 1; | |
40a55d20 | 518 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
96aa2d94 | 519 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; |
076bfcf6 | 520 | fp->_IO_write_end = (fp->_mode <= 0 |
d64b6ad0 | 521 | && (fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
40a55d20 | 522 | ? fp->_IO_buf_base : fp->_IO_buf_end); |
0720f75c | 523 | return count; |
96aa2d94 RM |
524 | } |
525 | ||
526 | int | |
b259e746 | 527 | _IO_new_file_underflow (fp) |
40a55d20 | 528 | _IO_FILE *fp; |
96aa2d94 RM |
529 | { |
530 | _IO_ssize_t count; | |
531 | #if 0 | |
532 | /* SysV does not make this test; take it out for compatibility */ | |
533 | if (fp->_flags & _IO_EOF_SEEN) | |
534 | return (EOF); | |
535 | #endif | |
536 | ||
537 | if (fp->_flags & _IO_NO_READS) | |
feb3c934 | 538 | { |
58034572 | 539 | fp->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
540 | __set_errno (EBADF); |
541 | return EOF; | |
542 | } | |
96aa2d94 | 543 | if (fp->_IO_read_ptr < fp->_IO_read_end) |
40a55d20 | 544 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 RM |
545 | |
546 | if (fp->_IO_buf_base == NULL) | |
00bc5db0 UD |
547 | { |
548 | /* Maybe we already have a push back pointer. */ | |
549 | if (fp->_IO_save_base != NULL) | |
550 | { | |
551 | free (fp->_IO_save_base); | |
552 | fp->_flags &= ~_IO_IN_BACKUP; | |
553 | } | |
77fe0b9c | 554 | INTUSE(_IO_doallocbuf) (fp); |
00bc5db0 | 555 | } |
96aa2d94 RM |
556 | |
557 | /* Flush all line buffered files before reading. */ | |
558 | /* FIXME This can/should be moved to genops ?? */ | |
559 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
3d759cb8 UD |
560 | { |
561 | #if 0 | |
77fe0b9c | 562 | INTUSE(_IO_flush_all_linebuffered) (); |
3d759cb8 UD |
563 | #else |
564 | /* We used to flush all line-buffered stream. This really isn't | |
565 | required by any standard. My recollection is that | |
566 | traditional Unix systems did this for stdout. stderr better | |
567 | not be line buffered. So we do just that here | |
568 | explicitly. --drepper */ | |
0261d33f | 569 | _IO_acquire_lock (_IO_stdout); |
3d759cb8 UD |
570 | |
571 | if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF)) | |
572 | == (_IO_LINKED | _IO_LINE_BUF)) | |
573 | _IO_OVERFLOW (_IO_stdout, EOF); | |
574 | ||
0261d33f | 575 | _IO_release_lock (_IO_stdout); |
3d759cb8 UD |
576 | #endif |
577 | } | |
96aa2d94 | 578 | |
77fe0b9c | 579 | INTUSE(_IO_switch_to_get_mode) (fp); |
96aa2d94 | 580 | |
2d7da676 UD |
581 | /* This is very tricky. We have to adjust those |
582 | pointers before we call _IO_SYSREAD () since | |
583 | we may longjump () out while waiting for | |
584 | input. Those pointers may be screwed up. H.J. */ | |
585 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
586 | fp->_IO_read_end = fp->_IO_buf_base; | |
587 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
588 | = fp->_IO_buf_base; | |
589 | ||
96aa2d94 RM |
590 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, |
591 | fp->_IO_buf_end - fp->_IO_buf_base); | |
592 | if (count <= 0) | |
593 | { | |
594 | if (count == 0) | |
595 | fp->_flags |= _IO_EOF_SEEN; | |
596 | else | |
597 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
598 | } | |
2d7da676 | 599 | fp->_IO_read_end += count; |
96aa2d94 RM |
600 | if (count == 0) |
601 | return EOF; | |
bd355af0 UD |
602 | if (fp->_offset != _IO_pos_BAD) |
603 | _IO_pos_adjust (fp->_offset, count); | |
40a55d20 | 604 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 | 605 | } |
77fe0b9c | 606 | INTDEF2(_IO_new_file_underflow, _IO_file_underflow) |
96aa2d94 | 607 | |
acbee5f6 RM |
608 | /* Guts of underflow callback if we mmap the file. This stats the file and |
609 | updates the stream state to match. In the normal case we return zero. | |
610 | If the file is no longer eligible for mmap, its jump tables are reset to | |
611 | the vanilla ones and we return nonzero. */ | |
612 | static int | |
613 | mmap_remap_check (_IO_FILE *fp) | |
0469311e | 614 | { |
acbee5f6 RM |
615 | struct _G_stat64 st; |
616 | ||
617 | if (_IO_SYSSTAT (fp, &st) == 0 | |
618 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
619 | /* Limit the file size to 1MB for 32-bit machines. */ | |
620 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)) | |
0469311e | 621 | { |
acbee5f6 RM |
622 | const size_t pagesize = __getpagesize (); |
623 | # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1)) | |
624 | if (ROUNDED (st.st_size) < ROUNDED (fp->_IO_buf_end | |
625 | - fp->_IO_buf_base)) | |
626 | { | |
627 | /* We can trim off some pages past the end of the file. */ | |
628 | (void) __munmap (fp->_IO_buf_base + ROUNDED (st.st_size), | |
629 | ROUNDED (fp->_IO_buf_end - fp->_IO_buf_base) | |
630 | - ROUNDED (st.st_size)); | |
631 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
632 | } | |
633 | else if (ROUNDED (st.st_size) > ROUNDED (fp->_IO_buf_end | |
634 | - fp->_IO_buf_base)) | |
635 | { | |
636 | /* The file added some pages. We need to remap it. */ | |
637 | void *p; | |
eaae7493 | 638 | #ifdef _G_HAVE_MREMAP |
acbee5f6 RM |
639 | p = __mremap (fp->_IO_buf_base, ROUNDED (fp->_IO_buf_end |
640 | - fp->_IO_buf_base), | |
641 | ROUNDED (st.st_size), MREMAP_MAYMOVE); | |
642 | if (p == MAP_FAILED) | |
643 | { | |
644 | (void) __munmap (fp->_IO_buf_base, | |
645 | fp->_IO_buf_end - fp->_IO_buf_base); | |
646 | goto punt; | |
647 | } | |
648 | #else | |
649 | (void) __munmap (fp->_IO_buf_base, | |
650 | fp->_IO_buf_end - fp->_IO_buf_base); | |
651 | # ifdef _G_MMAP64 | |
652 | p = _G_MMAP64 (NULL, st.st_size, PROT_READ, MAP_SHARED, | |
653 | fp->_fileno, 0); | |
654 | # else | |
655 | p = __mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, | |
656 | fp->_fileno, 0); | |
657 | # endif | |
658 | if (p == MAP_FAILED) | |
659 | goto punt; | |
660 | #endif | |
661 | fp->_IO_buf_base = p; | |
662 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
663 | } | |
664 | else | |
665 | { | |
666 | /* The number of pages didn't change. */ | |
667 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
668 | } | |
669 | # undef ROUNDED | |
670 | ||
671 | fp->_offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
fc77d66a RM |
672 | _IO_setg (fp, fp->_IO_buf_base, |
673 | fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base | |
674 | ? fp->_IO_buf_base + fp->_offset : fp->_IO_buf_end, | |
acbee5f6 | 675 | fp->_IO_buf_end); |
c4292489 | 676 | |
fc77d66a RM |
677 | /* If we are already positioned at or past the end of the file, don't |
678 | change the current offset. If not, seek past what we have mapped, | |
679 | mimicking the position left by a normal underflow reading into its | |
680 | buffer until EOF. */ | |
681 | ||
682 | if (fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base) | |
683 | { | |
684 | if ( | |
0469311e | 685 | # ifdef _G_LSEEK64 |
fc77d66a | 686 | _G_LSEEK64 |
0469311e | 687 | # else |
fc77d66a | 688 | __lseek |
0469311e | 689 | # endif |
fc77d66a RM |
690 | (fp->_fileno, fp->_IO_buf_end - fp->_IO_buf_base, SEEK_SET) |
691 | != fp->_IO_buf_end - fp->_IO_buf_base) | |
692 | fp->_flags |= _IO_ERR_SEEN; | |
693 | else | |
694 | fp->_offset = fp->_IO_buf_end - fp->_IO_buf_base; | |
0469311e | 695 | } |
acbee5f6 RM |
696 | |
697 | return 0; | |
698 | } | |
699 | else | |
700 | { | |
701 | /* Life is no longer good for mmap. Punt it. */ | |
702 | (void) __munmap (fp->_IO_buf_base, | |
703 | fp->_IO_buf_end - fp->_IO_buf_base); | |
704 | punt: | |
705 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; | |
706 | _IO_setg (fp, NULL, NULL, NULL); | |
707 | if (fp->_mode <= 0) | |
15a686af | 708 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
acbee5f6 RM |
709 | else |
710 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
711 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
712 | ||
713 | return 1; | |
0469311e | 714 | } |
acbee5f6 RM |
715 | } |
716 | ||
717 | /* Special callback replacing the underflow callbacks if we mmap the file. */ | |
718 | int | |
719 | _IO_file_underflow_mmap (_IO_FILE *fp) | |
720 | { | |
721 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
722 | return *(unsigned char *) fp->_IO_read_ptr; | |
723 | ||
724 | if (__builtin_expect (mmap_remap_check (fp), 0)) | |
725 | /* We punted to the regular file functions. */ | |
726 | return _IO_UNDERFLOW (fp); | |
727 | ||
728 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
729 | return *(unsigned char *) fp->_IO_read_ptr; | |
0469311e UD |
730 | |
731 | fp->_flags |= _IO_EOF_SEEN; | |
732 | return EOF; | |
733 | } | |
734 | ||
acbee5f6 RM |
735 | static void |
736 | decide_maybe_mmap (_IO_FILE *fp) | |
737 | { | |
738 | /* We use the file in read-only mode. This could mean we can | |
739 | mmap the file and use it without any copying. But not all | |
740 | file descriptors are for mmap-able objects and on 32-bit | |
741 | machines we don't want to map files which are too large since | |
742 | this would require too much virtual memory. */ | |
743 | struct _G_stat64 st; | |
744 | ||
745 | if (_IO_SYSSTAT (fp, &st) == 0 | |
746 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
747 | /* Limit the file size to 1MB for 32-bit machines. */ | |
748 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024) | |
749 | /* Sanity check. */ | |
750 | && (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size)) | |
751 | { | |
752 | /* Try to map the file. */ | |
753 | void *p; | |
754 | ||
755 | # ifdef _G_MMAP64 | |
756 | p = _G_MMAP64 (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); | |
757 | # else | |
758 | p = __mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); | |
759 | # endif | |
760 | if (p != MAP_FAILED) | |
761 | { | |
762 | /* OK, we managed to map the file. Set the buffer up and use a | |
763 | special jump table with simplified underflow functions which | |
764 | never tries to read anything from the file. */ | |
765 | ||
766 | if ( | |
767 | # ifdef _G_LSEEK64 | |
768 | _G_LSEEK64 | |
769 | # else | |
770 | __lseek | |
771 | # endif | |
772 | (fp->_fileno, st.st_size, SEEK_SET) != st.st_size) | |
773 | { | |
774 | (void) __munmap (p, st.st_size); | |
775 | fp->_offset = _IO_pos_BAD; | |
776 | } | |
777 | else | |
778 | { | |
779 | INTUSE(_IO_setb) (fp, p, (char *) p + st.st_size, 0); | |
780 | ||
781 | if (fp->_offset == _IO_pos_BAD) | |
782 | fp->_offset = 0; | |
783 | ||
784 | _IO_setg (fp, p, p + fp->_offset, p + st.st_size); | |
785 | fp->_offset = st.st_size; | |
786 | ||
787 | if (fp->_mode <= 0) | |
788 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_file_jumps_mmap; | |
789 | else | |
790 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_wfile_jumps_mmap; | |
791 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
792 | ||
793 | return; | |
794 | } | |
795 | } | |
796 | } | |
797 | ||
798 | /* We couldn't use mmap, so revert to the vanilla file operations. */ | |
799 | ||
800 | if (fp->_mode <= 0) | |
15a686af | 801 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
acbee5f6 RM |
802 | else |
803 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
804 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
805 | } | |
806 | ||
807 | int | |
808 | _IO_file_underflow_maybe_mmap (_IO_FILE *fp) | |
809 | { | |
810 | /* This is the first read attempt. Choose mmap or vanilla operations | |
811 | and then punt to the chosen underflow routine. */ | |
812 | decide_maybe_mmap (fp); | |
813 | return _IO_UNDERFLOW (fp); | |
814 | } | |
815 | ||
816 | ||
96aa2d94 | 817 | int |
b259e746 | 818 | _IO_new_file_overflow (f, ch) |
40a55d20 UD |
819 | _IO_FILE *f; |
820 | int ch; | |
96aa2d94 RM |
821 | { |
822 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
feb3c934 | 823 | { |
c131718c | 824 | f->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
825 | __set_errno (EBADF); |
826 | return EOF; | |
827 | } | |
96aa2d94 | 828 | /* If currently reading or no buffer allocated. */ |
a334319f | 829 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0 || f->_IO_write_base == 0) |
96aa2d94 RM |
830 | { |
831 | /* Allocate a buffer if needed. */ | |
a334319f | 832 | if (f->_IO_write_base == 0) |
96aa2d94 | 833 | { |
77fe0b9c | 834 | INTUSE(_IO_doallocbuf) (f); |
96aa2d94 RM |
835 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
836 | } | |
c6645251 UD |
837 | /* Otherwise must be currently reading. |
838 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
839 | logically slide the buffer forwards one block (by setting the | |
840 | read pointers to all point at the beginning of the block). This | |
841 | makes room for subsequent output. | |
842 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
843 | alone, so it can continue to correspond to the external position). */ | |
483b8cc6 UD |
844 | if (__builtin_expect (_IO_in_backup (f), 0)) |
845 | { | |
846 | size_t nbackup = f->_IO_read_end - f->_IO_read_ptr; | |
6fee3362 | 847 | INTUSE(_IO_free_backup_area) (f); |
483b8cc6 UD |
848 | f->_IO_read_base -= MIN (nbackup, |
849 | f->_IO_read_base - f->_IO_buf_base); | |
850 | f->_IO_read_ptr = f->_IO_read_base; | |
851 | } | |
eb35b097 UD |
852 | |
853 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
854 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
855 | f->_IO_write_ptr = f->_IO_read_ptr; | |
856 | f->_IO_write_base = f->_IO_write_ptr; | |
857 | f->_IO_write_end = f->_IO_buf_end; | |
858 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
96aa2d94 | 859 | |
96aa2d94 | 860 | f->_flags |= _IO_CURRENTLY_PUTTING; |
076bfcf6 | 861 | if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
bfcd44c3 | 862 | f->_IO_write_end = f->_IO_write_ptr; |
96aa2d94 RM |
863 | } |
864 | if (ch == EOF) | |
4483f2c0 RM |
865 | return INTUSE(_IO_do_write) (f, f->_IO_write_base, |
866 | f->_IO_write_ptr - f->_IO_write_base); | |
96aa2d94 | 867 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
40a55d20 | 868 | if (_IO_do_flush (f) == EOF) |
96aa2d94 RM |
869 | return EOF; |
870 | *f->_IO_write_ptr++ = ch; | |
871 | if ((f->_flags & _IO_UNBUFFERED) | |
872 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
4483f2c0 RM |
873 | if (INTUSE(_IO_do_write) (f, f->_IO_write_base, |
874 | f->_IO_write_ptr - f->_IO_write_base) == EOF) | |
96aa2d94 | 875 | return EOF; |
40a55d20 | 876 | return (unsigned char) ch; |
96aa2d94 | 877 | } |
77fe0b9c | 878 | INTDEF2(_IO_new_file_overflow, _IO_file_overflow) |
96aa2d94 RM |
879 | |
880 | int | |
b259e746 | 881 | _IO_new_file_sync (fp) |
40a55d20 | 882 | _IO_FILE *fp; |
96aa2d94 | 883 | { |
a2bde807 | 884 | _IO_ssize_t delta; |
61eb22d3 UD |
885 | int retval = 0; |
886 | ||
96aa2d94 RM |
887 | /* char* ptr = cur_ptr(); */ |
888 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
889 | if (_IO_do_flush(fp)) return EOF; | |
23396375 | 890 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
96aa2d94 RM |
891 | if (delta != 0) |
892 | { | |
893 | #ifdef TODO | |
40a55d20 UD |
894 | if (_IO_in_backup (fp)) |
895 | delta -= eGptr () - Gbase (); | |
96aa2d94 | 896 | #endif |
dfd2257a UD |
897 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, delta, 1); |
898 | if (new_pos != (_IO_off64_t) EOF) | |
96aa2d94 RM |
899 | fp->_IO_read_end = fp->_IO_read_ptr; |
900 | #ifdef ESPIPE | |
901 | else if (errno == ESPIPE) | |
902 | ; /* Ignore error from unseekable devices. */ | |
903 | #endif | |
904 | else | |
61eb22d3 | 905 | retval = EOF; |
96aa2d94 | 906 | } |
61eb22d3 | 907 | if (retval != EOF) |
bd355af0 | 908 | fp->_offset = _IO_pos_BAD; |
96aa2d94 RM |
909 | /* FIXME: Cleanup - can this be shared? */ |
910 | /* setg(base(), ptr, ptr); */ | |
61eb22d3 | 911 | return retval; |
96aa2d94 | 912 | } |
77fe0b9c | 913 | INTDEF2(_IO_new_file_sync, _IO_file_sync) |
96aa2d94 | 914 | |
acbee5f6 RM |
915 | static int |
916 | _IO_file_sync_mmap (_IO_FILE *fp) | |
917 | { | |
918 | if (fp->_IO_read_ptr != fp->_IO_read_end) | |
919 | { | |
920 | #ifdef TODO | |
921 | if (_IO_in_backup (fp)) | |
922 | delta -= eGptr () - Gbase (); | |
923 | #endif | |
924 | if ( | |
925 | # ifdef _G_LSEEK64 | |
926 | _G_LSEEK64 | |
927 | # else | |
928 | __lseek | |
929 | # endif | |
930 | (fp->_fileno, fp->_IO_read_ptr - fp->_IO_buf_base, SEEK_SET) | |
931 | != fp->_IO_read_ptr - fp->_IO_buf_base) | |
932 | { | |
933 | fp->_flags |= _IO_ERR_SEEN; | |
934 | return EOF; | |
935 | } | |
936 | } | |
937 | fp->_offset = fp->_IO_read_ptr - fp->_IO_buf_base; | |
938 | fp->_IO_read_end = fp->_IO_read_ptr = fp->_IO_read_base; | |
939 | return 0; | |
940 | } | |
941 | ||
942 | ||
d64b6ad0 | 943 | _IO_off64_t |
b259e746 | 944 | _IO_new_file_seekoff (fp, offset, dir, mode) |
40a55d20 | 945 | _IO_FILE *fp; |
dfd2257a | 946 | _IO_off64_t offset; |
40a55d20 UD |
947 | int dir; |
948 | int mode; | |
96aa2d94 | 949 | { |
d64b6ad0 | 950 | _IO_off64_t result; |
dfd2257a | 951 | _IO_off64_t delta, new_offset; |
96aa2d94 | 952 | long count; |
feb3c934 UD |
953 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file |
954 | offset of the underlying file must be exact. */ | |
955 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
956 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
96aa2d94 RM |
957 | |
958 | if (mode == 0) | |
959 | dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */ | |
960 | ||
961 | /* Flush unwritten characters. | |
962 | (This may do an unneeded write if we seek within the buffer. | |
963 | But to be able to switch to reading, we would need to set | |
964 | egptr to ptr. That can't be done in the current design, | |
965 | which assumes file_ptr() is eGptr. Anyway, since we probably | |
966 | end up flushing when we close(), it doesn't make much difference.) | |
967 | FIXME: simulate mem-papped files. */ | |
968 | ||
40a55d20 | 969 | if (fp->_IO_write_ptr > fp->_IO_write_base || _IO_in_put_mode (fp)) |
77fe0b9c | 970 | if (INTUSE(_IO_switch_to_get_mode) (fp)) |
40a55d20 | 971 | return EOF; |
96aa2d94 RM |
972 | |
973 | if (fp->_IO_buf_base == NULL) | |
974 | { | |
00bc5db0 UD |
975 | /* It could be that we already have a pushback buffer. */ |
976 | if (fp->_IO_read_base != NULL) | |
977 | { | |
978 | free (fp->_IO_read_base); | |
979 | fp->_flags &= ~_IO_IN_BACKUP; | |
980 | } | |
77fe0b9c | 981 | INTUSE(_IO_doallocbuf) (fp); |
40a55d20 UD |
982 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
983 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 RM |
984 | } |
985 | ||
986 | switch (dir) | |
987 | { | |
988 | case _IO_seek_cur: | |
989 | /* Adjust for read-ahead (bytes is buffer). */ | |
990 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
bd355af0 | 991 | if (fp->_offset == _IO_pos_BAD) |
eca29725 UD |
992 | { |
993 | if (mode != 0) | |
994 | goto dumb; | |
995 | else | |
996 | { | |
997 | result = _IO_SYSSEEK (fp, 0, dir); | |
998 | if (result == EOF) | |
999 | return result; | |
1000 | ||
1001 | fp->_offset = result; | |
1002 | } | |
1003 | } | |
96aa2d94 | 1004 | /* Make offset absolute, assuming current pointer is file_ptr(). */ |
d64b6ad0 | 1005 | offset += fp->_offset; |
405550bf UD |
1006 | if (offset < 0) |
1007 | { | |
1008 | __set_errno (EINVAL); | |
1009 | return EOF; | |
1010 | } | |
96aa2d94 RM |
1011 | |
1012 | dir = _IO_seek_set; | |
1013 | break; | |
1014 | case _IO_seek_set: | |
1015 | break; | |
1016 | case _IO_seek_end: | |
1017 | { | |
dfd2257a | 1018 | struct _G_stat64 st; |
40a55d20 | 1019 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
96aa2d94 RM |
1020 | { |
1021 | offset += st.st_size; | |
1022 | dir = _IO_seek_set; | |
1023 | } | |
1024 | else | |
1025 | goto dumb; | |
1026 | } | |
1027 | } | |
1028 | /* At this point, dir==_IO_seek_set. */ | |
1029 | ||
00bc5db0 UD |
1030 | /* If we are only interested in the current position we've found it now. */ |
1031 | if (mode == 0) | |
1032 | return offset; | |
1033 | ||
96aa2d94 | 1034 | /* If destination is within current buffer, optimize: */ |
bd355af0 | 1035 | if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL |
96aa2d94 RM |
1036 | && !_IO_in_backup (fp)) |
1037 | { | |
c03c66dd UD |
1038 | _IO_off64_t start_offset = (fp->_offset |
1039 | - (fp->_IO_read_end - fp->_IO_buf_base)); | |
1040 | if (offset >= start_offset && offset < fp->_offset) | |
96aa2d94 | 1041 | { |
c03c66dd UD |
1042 | _IO_setg (fp, fp->_IO_buf_base, |
1043 | fp->_IO_buf_base + (offset - start_offset), | |
1044 | fp->_IO_read_end); | |
1045 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1046 | ||
00bc5db0 | 1047 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 1048 | goto resync; |
96aa2d94 | 1049 | } |
96aa2d94 RM |
1050 | } |
1051 | ||
96aa2d94 RM |
1052 | if (fp->_flags & _IO_NO_READS) |
1053 | goto dumb; | |
1054 | ||
1055 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
1056 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
1057 | delta = offset - new_offset; | |
1058 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
1059 | { | |
1060 | new_offset = offset; | |
1061 | delta = 0; | |
1062 | } | |
1063 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
1064 | if (result < 0) | |
1065 | return EOF; | |
1066 | if (delta == 0) | |
1067 | count = 0; | |
1068 | else | |
1069 | { | |
1070 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
feb3c934 UD |
1071 | (must_be_exact |
1072 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
96aa2d94 RM |
1073 | if (count < delta) |
1074 | { | |
1075 | /* We weren't allowed to read, but try to seek the remainder. */ | |
1076 | offset = count == EOF ? delta : delta-count; | |
1077 | dir = _IO_seek_cur; | |
1078 | goto dumb; | |
1079 | } | |
1080 | } | |
40a55d20 UD |
1081 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, |
1082 | fp->_IO_buf_base + count); | |
1083 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
bd355af0 | 1084 | fp->_offset = result + count; |
40a55d20 | 1085 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
96aa2d94 RM |
1086 | return offset; |
1087 | dumb: | |
1088 | ||
77fe0b9c | 1089 | INTUSE(_IO_unsave_markers) (fp); |
96aa2d94 RM |
1090 | result = _IO_SYSSEEK (fp, offset, dir); |
1091 | if (result != EOF) | |
d762684b UD |
1092 | { |
1093 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1094 | fp->_offset = result; | |
1095 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1096 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1097 | } | |
96aa2d94 | 1098 | return result; |
4a582094 UD |
1099 | |
1100 | resync: | |
1101 | /* We need to do it since it is possible that the file offset in | |
1102 | the kernel may be changed behind our back. It may happen when | |
1103 | we fopen a file and then do a fork. One process may access the | |
1104 | the file and the kernel file offset will be changed. */ | |
1105 | if (fp->_offset >= 0) | |
1106 | _IO_SYSSEEK (fp, fp->_offset, 0); | |
1107 | ||
1108 | return offset; | |
96aa2d94 | 1109 | } |
77fe0b9c | 1110 | INTDEF2(_IO_new_file_seekoff, _IO_file_seekoff) |
96aa2d94 | 1111 | |
284749da UD |
1112 | _IO_off64_t |
1113 | _IO_file_seekoff_mmap (fp, offset, dir, mode) | |
1114 | _IO_FILE *fp; | |
1115 | _IO_off64_t offset; | |
1116 | int dir; | |
1117 | int mode; | |
1118 | { | |
1119 | _IO_off64_t result; | |
1120 | ||
7e93f915 RM |
1121 | /* If we are only interested in the current position, calculate it and |
1122 | return right now. This calculation does the right thing when we are | |
1123 | using a pushback buffer, but in the usual case has the same value as | |
1124 | (fp->_IO_read_ptr - fp->_IO_buf_base). */ | |
284749da | 1125 | if (mode == 0) |
78ce5a3b | 1126 | return fp->_offset - (fp->_IO_read_end - fp->_IO_read_ptr); |
284749da UD |
1127 | |
1128 | switch (dir) | |
1129 | { | |
1130 | case _IO_seek_cur: | |
1131 | /* Adjust for read-ahead (bytes is buffer). */ | |
1132 | offset += fp->_IO_read_ptr - fp->_IO_read_base; | |
1133 | break; | |
1134 | case _IO_seek_set: | |
1135 | break; | |
1136 | case _IO_seek_end: | |
903b3396 | 1137 | offset += fp->_IO_buf_end - fp->_IO_buf_base; |
284749da UD |
1138 | break; |
1139 | } | |
1140 | /* At this point, dir==_IO_seek_set. */ | |
1141 | ||
1142 | if (offset < 0) | |
66bff409 UD |
1143 | { |
1144 | /* No negative offsets are valid. */ | |
1145 | __set_errno (EINVAL); | |
1146 | return EOF; | |
1147 | } | |
284749da | 1148 | |
284749da UD |
1149 | result = _IO_SYSSEEK (fp, offset, 0); |
1150 | if (result < 0) | |
1151 | return EOF; | |
1152 | ||
fc77d66a RM |
1153 | if (offset > fp->_IO_buf_end - fp->_IO_buf_base) |
1154 | /* One can fseek arbitrarily past the end of the file | |
1155 | and it is meaningless until one attempts to read. | |
1156 | Leave the buffer pointers in EOF state until underflow. */ | |
1157 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_end, fp->_IO_buf_end); | |
1158 | else | |
1159 | /* Adjust the read pointers to match the file position, | |
1160 | but so the next read attempt will call underflow. */ | |
1161 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + offset, | |
1162 | fp->_IO_buf_base + offset); | |
1163 | ||
66bff409 | 1164 | fp->_offset = result; |
284749da UD |
1165 | |
1166 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1167 | ||
1168 | return offset; | |
1169 | } | |
1170 | ||
f5bf21a7 UD |
1171 | static _IO_off64_t |
1172 | _IO_file_seekoff_maybe_mmap (_IO_FILE *fp, _IO_off64_t offset, int dir, | |
1173 | int mode) | |
acbee5f6 RM |
1174 | { |
1175 | /* We only get here when we haven't tried to read anything yet. | |
1176 | So there is nothing more useful for us to do here than just | |
1177 | the underlying lseek call. */ | |
1178 | ||
1179 | _IO_off64_t result = _IO_SYSSEEK (fp, offset, dir); | |
1180 | if (result < 0) | |
1181 | return EOF; | |
1182 | ||
1183 | fp->_offset = result; | |
1184 | return result; | |
1185 | } | |
1186 | ||
96aa2d94 | 1187 | _IO_ssize_t |
40a55d20 UD |
1188 | _IO_file_read (fp, buf, size) |
1189 | _IO_FILE *fp; | |
1190 | void *buf; | |
1191 | _IO_ssize_t size; | |
96aa2d94 | 1192 | { |
e3c54d80 | 1193 | return (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0) |
ee8449f7 UD |
1194 | ? read_not_cancel (fp->_fileno, buf, size) |
1195 | : read (fp->_fileno, buf, size)); | |
96aa2d94 | 1196 | } |
77fe0b9c | 1197 | INTDEF(_IO_file_read) |
96aa2d94 | 1198 | |
d64b6ad0 | 1199 | _IO_off64_t |
40a55d20 UD |
1200 | _IO_file_seek (fp, offset, dir) |
1201 | _IO_FILE *fp; | |
dfd2257a | 1202 | _IO_off64_t offset; |
40a55d20 | 1203 | int dir; |
96aa2d94 | 1204 | { |
dfd2257a UD |
1205 | #ifdef _G_LSEEK64 |
1206 | return _G_LSEEK64 (fp->_fileno, offset, dir); | |
1207 | #else | |
61eb22d3 | 1208 | return lseek (fp->_fileno, offset, dir); |
dfd2257a | 1209 | #endif |
96aa2d94 | 1210 | } |
77fe0b9c | 1211 | INTDEF(_IO_file_seek) |
96aa2d94 RM |
1212 | |
1213 | int | |
40a55d20 UD |
1214 | _IO_file_stat (fp, st) |
1215 | _IO_FILE *fp; | |
1216 | void *st; | |
96aa2d94 | 1217 | { |
279eb600 | 1218 | #ifdef _G_FSTAT64 |
dfd2257a UD |
1219 | return _G_FSTAT64 (fp->_fileno, (struct _G_stat64 *) st); |
1220 | #else | |
319d719d | 1221 | return fstat (fp->_fileno, (struct stat *) st); |
dfd2257a | 1222 | #endif |
96aa2d94 | 1223 | } |
77fe0b9c | 1224 | INTDEF(_IO_file_stat) |
96aa2d94 | 1225 | |
0469311e UD |
1226 | int |
1227 | _IO_file_close_mmap (fp) | |
1228 | _IO_FILE *fp; | |
1229 | { | |
acbee5f6 RM |
1230 | /* In addition to closing the file descriptor we have to unmap the file. */ |
1231 | (void) __munmap (fp->_IO_buf_base, fp->_IO_buf_end - fp->_IO_buf_base); | |
0469311e | 1232 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; |
73299943 UD |
1233 | /* Cancelling close should be avoided if possible since it leaves an |
1234 | unrecoverable state behind. */ | |
1235 | return close_not_cancel (fp->_fileno); | |
0469311e UD |
1236 | } |
1237 | ||
96aa2d94 | 1238 | int |
40a55d20 UD |
1239 | _IO_file_close (fp) |
1240 | _IO_FILE *fp; | |
96aa2d94 | 1241 | { |
73299943 UD |
1242 | /* Cancelling close should be avoided if possible since it leaves an |
1243 | unrecoverable state behind. */ | |
1244 | return close_not_cancel (fp->_fileno); | |
96aa2d94 | 1245 | } |
77fe0b9c | 1246 | INTDEF(_IO_file_close) |
96aa2d94 RM |
1247 | |
1248 | _IO_ssize_t | |
b259e746 | 1249 | _IO_new_file_write (f, data, n) |
40a55d20 UD |
1250 | _IO_FILE *f; |
1251 | const void *data; | |
1252 | _IO_ssize_t n; | |
96aa2d94 RM |
1253 | { |
1254 | _IO_ssize_t to_do = n; | |
1255 | while (to_do > 0) | |
1256 | { | |
e3c54d80 UD |
1257 | _IO_ssize_t count = (__builtin_expect (f->_flags2 |
1258 | & _IO_FLAGS2_NOTCANCEL, 0) | |
ee8449f7 UD |
1259 | ? write_not_cancel (f->_fileno, data, to_do) |
1260 | : write (f->_fileno, data, to_do)); | |
d64b6ad0 | 1261 | if (count < 0) |
96aa2d94 | 1262 | { |
39e16978 UD |
1263 | f->_flags |= _IO_ERR_SEEN; |
1264 | break; | |
96aa2d94 RM |
1265 | } |
1266 | to_do -= count; | |
40a55d20 | 1267 | data = (void *) ((char *) data + count); |
96aa2d94 RM |
1268 | } |
1269 | n -= to_do; | |
bd355af0 UD |
1270 | if (f->_offset >= 0) |
1271 | f->_offset += n; | |
96aa2d94 RM |
1272 | return n; |
1273 | } | |
1274 | ||
1275 | _IO_size_t | |
b259e746 | 1276 | _IO_new_file_xsputn (f, data, n) |
40a55d20 UD |
1277 | _IO_FILE *f; |
1278 | const void *data; | |
1279 | _IO_size_t n; | |
96aa2d94 | 1280 | { |
d64b6ad0 | 1281 | register const char *s = (const char *) data; |
96aa2d94 RM |
1282 | _IO_size_t to_do = n; |
1283 | int must_flush = 0; | |
a334319f | 1284 | _IO_size_t count; |
96aa2d94 RM |
1285 | |
1286 | if (n <= 0) | |
1287 | return 0; | |
1288 | /* This is an optimized implementation. | |
1289 | If the amount to be written straddles a block boundary | |
1290 | (or the filebuf is unbuffered), use sys_write directly. */ | |
1291 | ||
1292 | /* First figure out how much space is available in the buffer. */ | |
a334319f | 1293 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ |
96aa2d94 RM |
1294 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) |
1295 | { | |
1296 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
1297 | if (count >= n) | |
40a55d20 UD |
1298 | { |
1299 | register const char *p; | |
96aa2d94 RM |
1300 | for (p = s + n; p > s; ) |
1301 | { | |
40a55d20 UD |
1302 | if (*--p == '\n') |
1303 | { | |
1304 | count = p - s + 1; | |
1305 | must_flush = 1; | |
1306 | break; | |
1307 | } | |
96aa2d94 RM |
1308 | } |
1309 | } | |
1310 | } | |
1311 | /* Then fill the buffer. */ | |
1312 | if (count > 0) | |
1313 | { | |
1314 | if (count > to_do) | |
1315 | count = to_do; | |
40a55d20 UD |
1316 | if (count > 20) |
1317 | { | |
86187531 UD |
1318 | #ifdef _LIBC |
1319 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); | |
1320 | #else | |
40a55d20 | 1321 | memcpy (f->_IO_write_ptr, s, count); |
86187531 UD |
1322 | f->_IO_write_ptr += count; |
1323 | #endif | |
40a55d20 UD |
1324 | s += count; |
1325 | } | |
96aa2d94 RM |
1326 | else |
1327 | { | |
1328 | register char *p = f->_IO_write_ptr; | |
40a55d20 UD |
1329 | register int i = (int) count; |
1330 | while (--i >= 0) | |
1331 | *p++ = *s++; | |
86187531 | 1332 | f->_IO_write_ptr = p; |
96aa2d94 | 1333 | } |
96aa2d94 RM |
1334 | to_do -= count; |
1335 | } | |
1336 | if (to_do + must_flush > 0) | |
40a55d20 | 1337 | { |
0720f75c | 1338 | _IO_size_t block_size, do_write; |
96aa2d94 | 1339 | /* Next flush the (full) buffer. */ |
5c8d1fc0 | 1340 | if (_IO_OVERFLOW (f, EOF) == EOF) |
a334319f | 1341 | return n - to_do; |
96aa2d94 RM |
1342 | |
1343 | /* Try to maintain alignment: write a whole number of blocks. | |
1344 | dont_write is what gets left over. */ | |
1345 | block_size = f->_IO_buf_end - f->_IO_buf_base; | |
0720f75c UD |
1346 | do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); |
1347 | ||
1348 | if (do_write) | |
1349 | { | |
1350 | count = new_do_write (f, s, do_write); | |
1351 | to_do -= count; | |
1352 | if (count < do_write) | |
1353 | return n - to_do; | |
1354 | } | |
23396375 | 1355 | |
96aa2d94 RM |
1356 | /* Now write out the remainder. Normally, this will fit in the |
1357 | buffer, but it's somewhat messier for line-buffered files, | |
1358 | so we let _IO_default_xsputn handle the general case. */ | |
0720f75c | 1359 | if (to_do) |
77fe0b9c | 1360 | to_do -= INTUSE(_IO_default_xsputn) (f, s+do_write, to_do); |
96aa2d94 RM |
1361 | } |
1362 | return n - to_do; | |
1363 | } | |
77fe0b9c | 1364 | INTDEF2(_IO_new_file_xsputn, _IO_file_xsputn) |
96aa2d94 | 1365 | |
96aa2d94 | 1366 | _IO_size_t |
40a55d20 UD |
1367 | _IO_file_xsgetn (fp, data, n) |
1368 | _IO_FILE *fp; | |
1369 | void *data; | |
1370 | _IO_size_t n; | |
96aa2d94 | 1371 | { |
4bca4c17 UD |
1372 | register _IO_size_t want, have; |
1373 | register _IO_ssize_t count; | |
96aa2d94 | 1374 | register char *s = data; |
8fe0fd03 UD |
1375 | |
1376 | want = n; | |
1377 | ||
310f9518 UD |
1378 | if (fp->_IO_buf_base == NULL) |
1379 | { | |
1380 | /* Maybe we already have a push back pointer. */ | |
1381 | if (fp->_IO_save_base != NULL) | |
1382 | { | |
1383 | free (fp->_IO_save_base); | |
1384 | fp->_flags &= ~_IO_IN_BACKUP; | |
1385 | } | |
77fe0b9c | 1386 | INTUSE(_IO_doallocbuf) (fp); |
310f9518 UD |
1387 | } |
1388 | ||
8fe0fd03 | 1389 | while (want > 0) |
96aa2d94 | 1390 | { |
8fe0fd03 UD |
1391 | have = fp->_IO_read_end - fp->_IO_read_ptr; |
1392 | if (want <= have) | |
96aa2d94 | 1393 | { |
8fe0fd03 UD |
1394 | memcpy (s, fp->_IO_read_ptr, want); |
1395 | fp->_IO_read_ptr += want; | |
1396 | want = 0; | |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | if (have > 0) | |
96aa2d94 | 1401 | { |
279eb600 UD |
1402 | #ifdef _LIBC |
1403 | s = __mempcpy (s, fp->_IO_read_ptr, have); | |
1404 | #else | |
8fe0fd03 | 1405 | memcpy (s, fp->_IO_read_ptr, have); |
8fe0fd03 | 1406 | s += have; |
279eb600 UD |
1407 | #endif |
1408 | want -= have; | |
8fe0fd03 | 1409 | fp->_IO_read_ptr += have; |
96aa2d94 | 1410 | } |
8fe0fd03 UD |
1411 | |
1412 | /* Check for backup and repeat */ | |
1413 | if (_IO_in_backup (fp)) | |
96aa2d94 | 1414 | { |
8fe0fd03 UD |
1415 | _IO_switch_to_main_get_area (fp); |
1416 | continue; | |
1417 | } | |
1418 | ||
1419 | /* If we now want less than a buffer, underflow and repeat | |
1420 | the copy. Otherwise, _IO_SYSREAD directly to | |
1421 | the user buffer. */ | |
6dd67bd5 UD |
1422 | if (fp->_IO_buf_base |
1423 | && want < (size_t) (fp->_IO_buf_end - fp->_IO_buf_base)) | |
8fe0fd03 UD |
1424 | { |
1425 | if (__underflow (fp) == EOF) | |
1426 | break; | |
1427 | ||
1428 | continue; | |
1429 | } | |
1430 | ||
4bca4c17 UD |
1431 | /* These must be set before the sysread as we might longjmp out |
1432 | waiting for input. */ | |
1433 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1434 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1435 | ||
279eb600 UD |
1436 | /* Try to maintain alignment: read a whole number of blocks. */ |
1437 | count = want; | |
1438 | if (fp->_IO_buf_base) | |
1439 | { | |
1440 | _IO_size_t block_size = fp->_IO_buf_end - fp->_IO_buf_base; | |
1441 | if (block_size >= 128) | |
1442 | count -= want % block_size; | |
1443 | } | |
1444 | ||
1445 | count = _IO_SYSREAD (fp, s, count); | |
96aa2d94 | 1446 | if (count <= 0) |
8fe0fd03 UD |
1447 | { |
1448 | if (count == 0) | |
1449 | fp->_flags |= _IO_EOF_SEEN; | |
1450 | else | |
1451 | fp->_flags |= _IO_ERR_SEEN; | |
1452 | ||
1453 | break; | |
1454 | } | |
23396375 | 1455 | |
96aa2d94 | 1456 | s += count; |
8fe0fd03 | 1457 | want -= count; |
4bca4c17 UD |
1458 | if (fp->_offset != _IO_pos_BAD) |
1459 | _IO_pos_adjust (fp->_offset, count); | |
96aa2d94 | 1460 | } |
96aa2d94 | 1461 | } |
8fe0fd03 UD |
1462 | |
1463 | return n - want; | |
96aa2d94 | 1464 | } |
77fe0b9c | 1465 | INTDEF(_IO_file_xsgetn) |
96aa2d94 | 1466 | |
a334319f UD |
1467 | static _IO_size_t _IO_file_xsgetn_mmap (_IO_FILE *, void *, _IO_size_t) |
1468 | __THROW; | |
284749da UD |
1469 | static _IO_size_t |
1470 | _IO_file_xsgetn_mmap (fp, data, n) | |
1471 | _IO_FILE *fp; | |
1472 | void *data; | |
1473 | _IO_size_t n; | |
1474 | { | |
1475 | register _IO_size_t have; | |
1476 | char *read_ptr = fp->_IO_read_ptr; | |
b39d5719 | 1477 | register char *s = (char *) data; |
284749da UD |
1478 | |
1479 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1480 | ||
1481 | if (have < n) | |
1482 | { | |
b39d5719 UD |
1483 | if (__builtin_expect (_IO_in_backup (fp), 0)) |
1484 | { | |
1485 | #ifdef _LIBC | |
1486 | s = __mempcpy (s, read_ptr, have); | |
1487 | #else | |
1488 | memcpy (s, read_ptr, have); | |
1489 | s += have; | |
1490 | #endif | |
1491 | n -= have; | |
1492 | _IO_switch_to_main_get_area (fp); | |
1493 | read_ptr = fp->_IO_read_ptr; | |
1494 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1495 | } | |
1496 | ||
1497 | if (have < n) | |
1498 | { | |
acbee5f6 RM |
1499 | /* Check that we are mapping all of the file, in case it grew. */ |
1500 | if (__builtin_expect (mmap_remap_check (fp), 0)) | |
1501 | /* We punted mmap, so complete with the vanilla code. */ | |
1502 | return s - (char *) data + _IO_XSGETN (fp, data, n); | |
1503 | ||
1504 | read_ptr = fp->_IO_read_ptr; | |
1505 | have = fp->_IO_read_end - read_ptr; | |
b39d5719 | 1506 | } |
284749da UD |
1507 | } |
1508 | ||
c4292489 UD |
1509 | if (have < n) |
1510 | fp->_flags |= _IO_EOF_SEEN; | |
1511 | ||
1512 | if (have != 0) | |
284749da UD |
1513 | { |
1514 | have = MIN (have, n); | |
b39d5719 UD |
1515 | #ifdef _LIBC |
1516 | s = __mempcpy (s, read_ptr, have); | |
1517 | #else | |
1518 | memcpy (s, read_ptr, have); | |
1519 | s += have; | |
1520 | #endif | |
284749da UD |
1521 | fp->_IO_read_ptr = read_ptr + have; |
1522 | } | |
1523 | ||
b39d5719 | 1524 | return s - (char *) data; |
284749da UD |
1525 | } |
1526 | ||
a334319f UD |
1527 | static _IO_size_t _IO_file_xsgetn_maybe_mmap (_IO_FILE *, void *, _IO_size_t) |
1528 | __THROW; | |
acbee5f6 RM |
1529 | static _IO_size_t |
1530 | _IO_file_xsgetn_maybe_mmap (fp, data, n) | |
1531 | _IO_FILE *fp; | |
1532 | void *data; | |
1533 | _IO_size_t n; | |
1534 | { | |
1535 | /* We only get here if this is the first attempt to read something. | |
1536 | Decide which operations to use and then punt to the chosen one. */ | |
1537 | ||
1538 | decide_maybe_mmap (fp); | |
1539 | return _IO_XSGETN (fp, data, n); | |
1540 | } | |
1541 | ||
94b68ee9 | 1542 | #ifdef _LIBC |
4483f2c0 | 1543 | # undef _IO_do_write |
4ab6f47c | 1544 | # undef _IO_file_close_it |
94b68ee9 RM |
1545 | versioned_symbol (libc, _IO_new_do_write, _IO_do_write, GLIBC_2_1); |
1546 | versioned_symbol (libc, _IO_new_file_attach, _IO_file_attach, GLIBC_2_1); | |
1547 | versioned_symbol (libc, _IO_new_file_close_it, _IO_file_close_it, GLIBC_2_1); | |
1548 | versioned_symbol (libc, _IO_new_file_finish, _IO_file_finish, GLIBC_2_1); | |
1549 | versioned_symbol (libc, _IO_new_file_fopen, _IO_file_fopen, GLIBC_2_1); | |
1550 | versioned_symbol (libc, _IO_new_file_init, _IO_file_init, GLIBC_2_1); | |
1551 | versioned_symbol (libc, _IO_new_file_setbuf, _IO_file_setbuf, GLIBC_2_1); | |
1552 | versioned_symbol (libc, _IO_new_file_sync, _IO_file_sync, GLIBC_2_1); | |
1553 | versioned_symbol (libc, _IO_new_file_overflow, _IO_file_overflow, GLIBC_2_1); | |
1554 | versioned_symbol (libc, _IO_new_file_seekoff, _IO_file_seekoff, GLIBC_2_1); | |
1555 | versioned_symbol (libc, _IO_new_file_underflow, _IO_file_underflow, GLIBC_2_1); | |
1556 | versioned_symbol (libc, _IO_new_file_write, _IO_file_write, GLIBC_2_1); | |
1557 | versioned_symbol (libc, _IO_new_file_xsputn, _IO_file_xsputn, GLIBC_2_1); | |
1558 | #endif | |
1559 | ||
b2637a22 | 1560 | const struct _IO_jump_t _IO_file_jumps = |
40a55d20 | 1561 | { |
96aa2d94 | 1562 | JUMP_INIT_DUMMY, |
77fe0b9c UD |
1563 | JUMP_INIT(finish, INTUSE(_IO_file_finish)), |
1564 | JUMP_INIT(overflow, INTUSE(_IO_file_overflow)), | |
1565 | JUMP_INIT(underflow, INTUSE(_IO_file_underflow)), | |
1566 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), | |
1567 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
1568 | JUMP_INIT(xsputn, INTUSE(_IO_file_xsputn)), | |
1569 | JUMP_INIT(xsgetn, INTUSE(_IO_file_xsgetn)), | |
b259e746 | 1570 | JUMP_INIT(seekoff, _IO_new_file_seekoff), |
96aa2d94 | 1571 | JUMP_INIT(seekpos, _IO_default_seekpos), |
b259e746 UD |
1572 | JUMP_INIT(setbuf, _IO_new_file_setbuf), |
1573 | JUMP_INIT(sync, _IO_new_file_sync), | |
77fe0b9c UD |
1574 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), |
1575 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
b259e746 | 1576 | JUMP_INIT(write, _IO_new_file_write), |
77fe0b9c UD |
1577 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), |
1578 | JUMP_INIT(close, INTUSE(_IO_file_close)), | |
1579 | JUMP_INIT(stat, INTUSE(_IO_file_stat)), | |
dfd2257a | 1580 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
0469311e UD |
1581 | JUMP_INIT(imbue, _IO_default_imbue) |
1582 | }; | |
15a686af | 1583 | libc_hidden_data_def (_IO_file_jumps) |
0469311e | 1584 | |
b2637a22 | 1585 | const struct _IO_jump_t _IO_file_jumps_mmap = |
0469311e UD |
1586 | { |
1587 | JUMP_INIT_DUMMY, | |
77fe0b9c UD |
1588 | JUMP_INIT(finish, INTUSE(_IO_file_finish)), |
1589 | JUMP_INIT(overflow, INTUSE(_IO_file_overflow)), | |
0469311e | 1590 | JUMP_INIT(underflow, _IO_file_underflow_mmap), |
77fe0b9c UD |
1591 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), |
1592 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
0469311e | 1593 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
284749da UD |
1594 | JUMP_INIT(xsgetn, _IO_file_xsgetn_mmap), |
1595 | JUMP_INIT(seekoff, _IO_file_seekoff_mmap), | |
0469311e | 1596 | JUMP_INIT(seekpos, _IO_default_seekpos), |
bff334e0 | 1597 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), |
acbee5f6 | 1598 | JUMP_INIT(sync, _IO_file_sync_mmap), |
77fe0b9c UD |
1599 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), |
1600 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
0469311e | 1601 | JUMP_INIT(write, _IO_new_file_write), |
77fe0b9c | 1602 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), |
0469311e | 1603 | JUMP_INIT(close, _IO_file_close_mmap), |
77fe0b9c | 1604 | JUMP_INIT(stat, INTUSE(_IO_file_stat)), |
0469311e | 1605 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
acbee5f6 RM |
1606 | JUMP_INIT(imbue, _IO_default_imbue) |
1607 | }; | |
1608 | ||
b2637a22 | 1609 | const struct _IO_jump_t _IO_file_jumps_maybe_mmap = |
acbee5f6 RM |
1610 | { |
1611 | JUMP_INIT_DUMMY, | |
1612 | JUMP_INIT(finish, INTUSE(_IO_file_finish)), | |
1613 | JUMP_INIT(overflow, INTUSE(_IO_file_overflow)), | |
1614 | JUMP_INIT(underflow, _IO_file_underflow_maybe_mmap), | |
1615 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), | |
1616 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
1617 | JUMP_INIT(xsputn, _IO_new_file_xsputn), | |
1618 | JUMP_INIT(xsgetn, _IO_file_xsgetn_maybe_mmap), | |
1619 | JUMP_INIT(seekoff, _IO_file_seekoff_maybe_mmap), | |
1620 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
1621 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), | |
1622 | JUMP_INIT(sync, _IO_new_file_sync), | |
1623 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), | |
1624 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
1625 | JUMP_INIT(write, _IO_new_file_write), | |
1626 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), | |
1627 | JUMP_INIT(close, _IO_file_close), | |
1628 | JUMP_INIT(stat, INTUSE(_IO_file_stat)), | |
1629 | JUMP_INIT(showmanyc, _IO_default_showmanyc), | |
dfd2257a | 1630 | JUMP_INIT(imbue, _IO_default_imbue) |
96aa2d94 | 1631 | }; |