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d4697bc9 | 1 | /* Copyright (C) 1993-2014 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 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. | |
96aa2d94 | 18 | |
41bdb6e2 AJ |
19 | As a special exception, if you link the code in this file with |
20 | files compiled with a GNU compiler to produce an executable, | |
21 | that does not cause the resulting executable to be covered by | |
22 | the GNU Lesser General Public License. This exception does not | |
23 | however invalidate any other reasons why the executable file | |
24 | might be covered by the GNU Lesser General Public License. | |
25 | This exception applies to code released by its copyright holders | |
26 | in files containing the exception. */ | |
96aa2d94 | 27 | |
96aa2d94 | 28 | |
fa0bc87c RM |
29 | #ifndef _POSIX_SOURCE |
30 | # define _POSIX_SOURCE | |
31 | #endif | |
96aa2d94 | 32 | #include "libioP.h" |
129d706d | 33 | #include <assert.h> |
96aa2d94 | 34 | #include <fcntl.h> |
284749da | 35 | #include <sys/param.h> |
96aa2d94 RM |
36 | #include <sys/types.h> |
37 | #include <sys/stat.h> | |
38 | #include <string.h> | |
39 | #include <errno.h> | |
c9f10034 | 40 | #include <unistd.h> |
00bc5db0 | 41 | #include <stdlib.h> |
4e2e9999 UD |
42 | #if _LIBC |
43 | # include "../wcsmbs/wcsmbsload.h" | |
129d706d UD |
44 | # include "../iconv/gconv_charset.h" |
45 | # include "../iconv/gconv_int.h" | |
0bf98029 | 46 | # include <shlib-compat.h> |
73299943 | 47 | # include <not-cancel.h> |
37233df9 | 48 | # include <kernel-features.h> |
4e2e9999 | 49 | #endif |
96aa2d94 RM |
50 | #ifndef errno |
51 | extern int errno; | |
52 | #endif | |
4547c1a4 UD |
53 | #ifndef __set_errno |
54 | # define __set_errno(Val) errno = (Val) | |
55 | #endif | |
96aa2d94 | 56 | |
68dbb3a6 UD |
57 | |
58 | #ifdef _LIBC | |
61eb22d3 | 59 | # define open(Name, Flags, Prot) __open (Name, Flags, Prot) |
61eb22d3 UD |
60 | # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) |
61 | # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) | |
62 | # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) | |
319d719d UD |
63 | #else |
64 | # define _IO_new_do_write _IO_do_write | |
65 | # define _IO_new_file_attach _IO_file_attach | |
66 | # define _IO_new_file_close_it _IO_file_close_it | |
67 | # define _IO_new_file_finish _IO_file_finish | |
68 | # define _IO_new_file_fopen _IO_file_fopen | |
69 | # define _IO_new_file_init _IO_file_init | |
70 | # define _IO_new_file_setbuf _IO_file_setbuf | |
71 | # define _IO_new_file_sync _IO_file_sync | |
72 | # define _IO_new_file_overflow _IO_file_overflow | |
73 | # define _IO_new_file_seekoff _IO_file_seekoff | |
74 | # define _IO_new_file_underflow _IO_file_underflow | |
75 | # define _IO_new_file_write _IO_file_write | |
76 | # define _IO_new_file_xsputn _IO_file_xsputn | |
68dbb3a6 UD |
77 | #endif |
78 | ||
129d706d UD |
79 | |
80 | #ifdef _LIBC | |
ab26a24a | 81 | extern struct __gconv_trans_data __libio_translit attribute_hidden; |
129d706d UD |
82 | #endif |
83 | ||
84 | ||
96aa2d94 RM |
85 | /* An fstream can be in at most one of put mode, get mode, or putback mode. |
86 | Putback mode is a variant of get mode. | |
87 | ||
88 | In a filebuf, there is only one current position, instead of two | |
6d52618b | 89 | separate get and put pointers. In get mode, the current position |
96aa2d94 RM |
90 | is that of gptr(); in put mode that of pptr(). |
91 | ||
92 | The position in the buffer that corresponds to the position | |
a18f587d UD |
93 | in external file system is normally _IO_read_end, except in putback |
94 | mode, when it is _IO_save_end. | |
96aa2d94 RM |
95 | If the field _fb._offset is >= 0, it gives the offset in |
96 | the file as a whole corresponding to eGptr(). (?) | |
97 | ||
98 | PUT MODE: | |
a18f587d UD |
99 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, |
100 | and _IO_read_base are equal to each other. These are usually equal | |
101 | to _IO_buf_base, though not necessarily if we have switched from | |
102 | get mode to put mode. (The reason is to maintain the invariant | |
103 | that _IO_read_end corresponds to the external file position.) | |
1ffb8c90 | 104 | _IO_write_base is non-NULL and usually equal to _IO_buf_base. |
a18f587d UD |
105 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. |
106 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
107 | ||
96aa2d94 RM |
108 | GET MODE: |
109 | If a filebuf is in get or putback mode, eback() != egptr(). | |
110 | In get mode, the unread characters are between gptr() and egptr(). | |
111 | The OS file position corresponds to that of egptr(). | |
a18f587d | 112 | |
96aa2d94 RM |
113 | PUTBACK MODE: |
114 | Putback mode is used to remember "excess" characters that have | |
115 | been sputbackc'd in a separate putback buffer. | |
116 | In putback mode, the get buffer points to the special putback buffer. | |
117 | The unread characters are the characters between gptr() and egptr() | |
118 | in the putback buffer, as well as the area between save_gptr() | |
119 | and save_egptr(), which point into the original reserve buffer. | |
120 | (The pointers save_gptr() and save_egptr() are the values | |
121 | of gptr() and egptr() at the time putback mode was entered.) | |
122 | The OS position corresponds to that of save_egptr(). | |
23396375 | 123 | |
96aa2d94 | 124 | LINE BUFFERED OUTPUT: |
a18f587d | 125 | During line buffered output, _IO_write_base==base() && epptr()==base(). |
96aa2d94 RM |
126 | However, ptr() may be anywhere between base() and ebuf(). |
127 | This forces a call to filebuf::overflow(int C) on every put. | |
128 | If there is more space in the buffer, and C is not a '\n', | |
129 | then C is inserted, and pptr() incremented. | |
23396375 | 130 | |
96aa2d94 RM |
131 | UNBUFFERED STREAMS: |
132 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
133 | */ | |
134 | ||
135 | #define CLOSED_FILEBUF_FLAGS \ | |
136 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
137 | ||
138 | ||
139 | void | |
b259e746 | 140 | _IO_new_file_init (fp) |
2ca8b1ee | 141 | struct _IO_FILE_plus *fp; |
96aa2d94 RM |
142 | { |
143 | /* POSIX.1 allows another file handle to be used to change the position | |
144 | of our file descriptor. Hence we actually don't know the actual | |
145 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
146 | fp->file._offset = _IO_pos_BAD; |
147 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
96aa2d94 | 148 | |
d18ea0c5 | 149 | _IO_link_in (fp); |
2ca8b1ee | 150 | fp->file._fileno = -1; |
96aa2d94 | 151 | } |
d18ea0c5 | 152 | libc_hidden_ver (_IO_new_file_init, _IO_file_init) |
96aa2d94 RM |
153 | |
154 | int | |
b259e746 | 155 | _IO_new_file_close_it (fp) |
40a55d20 | 156 | _IO_FILE *fp; |
96aa2d94 | 157 | { |
eb6cbd24 | 158 | int write_status; |
40a55d20 | 159 | if (!_IO_file_is_open (fp)) |
96aa2d94 RM |
160 | return EOF; |
161 | ||
eb6cbd24 MF |
162 | if ((fp->_flags & _IO_NO_WRITES) == 0 |
163 | && (fp->_flags & _IO_CURRENTLY_PUTTING) != 0) | |
3384a8d6 | 164 | write_status = _IO_do_flush (fp); |
ca408c15 UD |
165 | else |
166 | write_status = 0; | |
96aa2d94 | 167 | |
d18ea0c5 | 168 | _IO_unsave_markers (fp); |
96aa2d94 | 169 | |
94b7cc37 UD |
170 | int close_status = ((fp->_flags2 & _IO_FLAGS2_NOCLOSE) == 0 |
171 | ? _IO_SYSCLOSE (fp) : 0); | |
96aa2d94 RM |
172 | |
173 | /* Free buffer. */ | |
319d719d | 174 | #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
1e88bd0f | 175 | if (fp->_mode > 0) |
d64b6ad0 | 176 | { |
44c4ccbc | 177 | if (_IO_have_wbackup (fp)) |
d18ea0c5 AS |
178 | _IO_free_wbackup_area (fp); |
179 | _IO_wsetb (fp, NULL, NULL, 0); | |
d64b6ad0 UD |
180 | _IO_wsetg (fp, NULL, NULL, NULL); |
181 | _IO_wsetp (fp, NULL, NULL); | |
182 | } | |
319d719d | 183 | #endif |
d18ea0c5 | 184 | _IO_setb (fp, NULL, NULL, 0); |
1e88bd0f UD |
185 | _IO_setg (fp, NULL, NULL, NULL); |
186 | _IO_setp (fp, NULL, NULL); | |
96aa2d94 | 187 | |
d18ea0c5 | 188 | _IO_un_link ((struct _IO_FILE_plus *) fp); |
96aa2d94 | 189 | fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; |
110215a9 | 190 | fp->_fileno = -1; |
bd355af0 | 191 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 192 | |
fa0bc87c | 193 | return close_status ? close_status : write_status; |
96aa2d94 | 194 | } |
d18ea0c5 | 195 | libc_hidden_ver (_IO_new_file_close_it, _IO_file_close_it) |
96aa2d94 RM |
196 | |
197 | void | |
b259e746 | 198 | _IO_new_file_finish (fp, dummy) |
40a55d20 UD |
199 | _IO_FILE *fp; |
200 | int dummy; | |
96aa2d94 | 201 | { |
40a55d20 | 202 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
203 | { |
204 | _IO_do_flush (fp); | |
205 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) | |
206 | _IO_SYSCLOSE (fp); | |
207 | } | |
d18ea0c5 | 208 | _IO_default_finish (fp, 0); |
96aa2d94 | 209 | } |
d18ea0c5 | 210 | libc_hidden_ver (_IO_new_file_finish, _IO_file_finish) |
96aa2d94 | 211 | |
bd355af0 UD |
212 | _IO_FILE * |
213 | _IO_file_open (fp, filename, posix_mode, prot, read_write, is32not64) | |
214 | _IO_FILE *fp; | |
215 | const char *filename; | |
216 | int posix_mode; | |
217 | int prot; | |
218 | int read_write; | |
219 | int is32not64; | |
220 | { | |
221 | int fdesc; | |
ee8449f7 | 222 | #ifdef _LIBC |
e3c54d80 | 223 | if (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0)) |
ee8449f7 UD |
224 | fdesc = open_not_cancel (filename, |
225 | posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
226 | else | |
227 | fdesc = open (filename, posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
bd355af0 UD |
228 | #else |
229 | fdesc = open (filename, posix_mode, prot); | |
230 | #endif | |
231 | if (fdesc < 0) | |
232 | return NULL; | |
233 | fp->_fileno = fdesc; | |
234 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
c096ab25 | 235 | if ((read_write & _IO_IS_APPENDING) && (read_write & _IO_NO_READS)) |
bd355af0 UD |
236 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT) |
237 | == _IO_pos_BAD && errno != ESPIPE) | |
2c617417 | 238 | { |
e3c54d80 | 239 | close_not_cancel (fdesc); |
2c617417 UD |
240 | return NULL; |
241 | } | |
d18ea0c5 | 242 | _IO_link_in ((struct _IO_FILE_plus *) fp); |
bd355af0 UD |
243 | return fp; |
244 | } | |
ee2a5ae8 | 245 | libc_hidden_def (_IO_file_open) |
bd355af0 | 246 | |
96aa2d94 | 247 | _IO_FILE * |
b259e746 | 248 | _IO_new_file_fopen (fp, filename, mode, is32not64) |
40a55d20 UD |
249 | _IO_FILE *fp; |
250 | const char *filename; | |
251 | const char *mode; | |
dfd2257a | 252 | int is32not64; |
96aa2d94 RM |
253 | { |
254 | int oflags = 0, omode; | |
bd355af0 | 255 | int read_write; |
96aa2d94 | 256 | int oprot = 0666; |
f38931a9 | 257 | int i; |
4e2e9999 | 258 | _IO_FILE *result; |
129d706d | 259 | #ifdef _LIBC |
4e2e9999 | 260 | const char *cs; |
129d706d | 261 | const char *last_recognized; |
4e2e9999 UD |
262 | #endif |
263 | ||
96aa2d94 RM |
264 | if (_IO_file_is_open (fp)) |
265 | return 0; | |
f38931a9 | 266 | switch (*mode) |
40a55d20 UD |
267 | { |
268 | case 'r': | |
269 | omode = O_RDONLY; | |
270 | read_write = _IO_NO_WRITES; | |
271 | break; | |
272 | case 'w': | |
273 | omode = O_WRONLY; | |
274 | oflags = O_CREAT|O_TRUNC; | |
275 | read_write = _IO_NO_READS; | |
276 | break; | |
277 | case 'a': | |
278 | omode = O_WRONLY; | |
279 | oflags = O_CREAT|O_APPEND; | |
280 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
281 | break; | |
282 | default: | |
283 | __set_errno (EINVAL); | |
284 | return NULL; | |
285 | } | |
129d706d UD |
286 | #ifdef _LIBC |
287 | last_recognized = mode; | |
288 | #endif | |
b722481a | 289 | for (i = 1; i < 7; ++i) |
40a55d20 | 290 | { |
f38931a9 UD |
291 | switch (*++mode) |
292 | { | |
293 | case '\0': | |
294 | break; | |
295 | case '+': | |
296 | omode = O_RDWR; | |
297 | read_write &= _IO_IS_APPENDING; | |
129d706d UD |
298 | #ifdef _LIBC |
299 | last_recognized = mode; | |
300 | #endif | |
f38931a9 UD |
301 | continue; |
302 | case 'x': | |
303 | oflags |= O_EXCL; | |
129d706d UD |
304 | #ifdef _LIBC |
305 | last_recognized = mode; | |
306 | #endif | |
f38931a9 UD |
307 | continue; |
308 | case 'b': | |
129d706d UD |
309 | #ifdef _LIBC |
310 | last_recognized = mode; | |
311 | #endif | |
b7fc6d07 UD |
312 | continue; |
313 | case 'm': | |
314 | fp->_flags2 |= _IO_FLAGS2_MMAP; | |
315 | continue; | |
ee8449f7 UD |
316 | case 'c': |
317 | fp->_flags2 |= _IO_FLAGS2_NOTCANCEL; | |
0d74e043 | 318 | continue; |
65d834b0 | 319 | case 'e': |
94b7cc37 | 320 | #ifdef O_CLOEXEC |
65d834b0 | 321 | oflags |= O_CLOEXEC; |
65d834b0 | 322 | #endif |
94b7cc37 UD |
323 | fp->_flags2 |= _IO_FLAGS2_CLOEXEC; |
324 | continue; | |
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 | ||
a101b025 | 335 | if (result != NULL) |
94b7cc37 | 336 | { |
a101b025 AJ |
337 | #ifndef __ASSUME_O_CLOEXEC |
338 | if ((fp->_flags2 & _IO_FLAGS2_CLOEXEC) != 0 && __have_o_cloexec <= 0) | |
94b7cc37 | 339 | { |
a101b025 AJ |
340 | int fd = _IO_fileno (fp); |
341 | if (__have_o_cloexec == 0) | |
342 | { | |
343 | int flags = __fcntl (fd, F_GETFD); | |
344 | __have_o_cloexec = (flags & FD_CLOEXEC) == 0 ? -1 : 1; | |
345 | } | |
346 | if (__have_o_cloexec < 0) | |
347 | __fcntl (fd, F_SETFD, FD_CLOEXEC); | |
94b7cc37 | 348 | } |
94b7cc37 | 349 | #endif |
4e2e9999 | 350 | |
129d706d UD |
351 | /* Test whether the mode string specifies the conversion. */ |
352 | cs = strstr (last_recognized + 1, ",ccs="); | |
353 | if (cs != NULL) | |
354 | { | |
355 | /* Yep. Load the appropriate conversions and set the orientation | |
356 | to wide. */ | |
357 | struct gconv_fcts fcts; | |
358 | struct _IO_codecvt *cc; | |
359 | char *endp = __strchrnul (cs + 5, ','); | |
360 | char ccs[endp - (cs + 5) + 3]; | |
361 | ||
362 | *((char *) __mempcpy (ccs, cs + 5, endp - (cs + 5))) = '\0'; | |
363 | strip (ccs, ccs); | |
364 | ||
365 | if (__wcsmbs_named_conv (&fcts, ccs[2] == '\0' | |
366 | ? upstr (ccs, cs + 5) : ccs) != 0) | |
367 | { | |
368 | /* Something went wrong, we cannot load the conversion modules. | |
369 | This means we cannot proceed since the user explicitly asked | |
370 | for these. */ | |
d18ea0c5 | 371 | (void) _IO_file_close_it (fp); |
129d706d UD |
372 | __set_errno (EINVAL); |
373 | return NULL; | |
374 | } | |
375 | ||
376 | assert (fcts.towc_nsteps == 1); | |
377 | assert (fcts.tomb_nsteps == 1); | |
378 | ||
379 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
380 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; | |
381 | ||
382 | /* Clear the state. We start all over again. */ | |
383 | memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t)); | |
384 | memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t)); | |
385 | ||
386 | cc = fp->_codecvt = &fp->_wide_data->_codecvt; | |
387 | ||
388 | /* The functions are always the same. */ | |
389 | *cc = __libio_codecvt; | |
390 | ||
391 | cc->__cd_in.__cd.__nsteps = fcts.towc_nsteps; | |
392 | cc->__cd_in.__cd.__steps = fcts.towc; | |
393 | ||
394 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0; | |
395 | cc->__cd_in.__cd.__data[0].__internal_use = 1; | |
396 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
397 | cc->__cd_in.__cd.__data[0].__statep = &result->_wide_data->_IO_state; | |
398 | ||
399 | /* XXX For now no transliteration. */ | |
400 | cc->__cd_in.__cd.__data[0].__trans = NULL; | |
401 | ||
402 | cc->__cd_out.__cd.__nsteps = fcts.tomb_nsteps; | |
403 | cc->__cd_out.__cd.__steps = fcts.tomb; | |
404 | ||
405 | cc->__cd_out.__cd.__data[0].__invocation_counter = 0; | |
406 | cc->__cd_out.__cd.__data[0].__internal_use = 1; | |
407 | cc->__cd_out.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
408 | cc->__cd_out.__cd.__data[0].__statep = | |
409 | &result->_wide_data->_IO_state; | |
410 | ||
411 | /* And now the transliteration. */ | |
412 | cc->__cd_out.__cd.__data[0].__trans = &__libio_translit; | |
413 | ||
a815c3ab UD |
414 | /* From now on use the wide character callback functions. */ |
415 | ((struct _IO_FILE_plus *) fp)->vtable = fp->_wide_data->_wide_vtable; | |
416 | ||
129d706d UD |
417 | /* Set the mode now. */ |
418 | result->_mode = 1; | |
129d706d | 419 | } |
4e2e9999 | 420 | } |
4e2e9999 UD |
421 | |
422 | return result; | |
96aa2d94 | 423 | } |
d18ea0c5 | 424 | libc_hidden_ver (_IO_new_file_fopen, _IO_file_fopen) |
96aa2d94 | 425 | |
40a55d20 | 426 | _IO_FILE * |
b259e746 | 427 | _IO_new_file_attach (fp, fd) |
40a55d20 UD |
428 | _IO_FILE *fp; |
429 | int fd; | |
96aa2d94 | 430 | { |
40a55d20 | 431 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
432 | return NULL; |
433 | fp->_fileno = fd; | |
434 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
435 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
f65fd747 UD |
436 | /* Get the current position of the file. */ |
437 | /* We have to do that since that may be junk. */ | |
bd355af0 | 438 | fp->_offset = _IO_pos_BAD; |
c4a710b6 | 439 | int save_errno = errno; |
dfd2257a | 440 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) |
f65fd747 UD |
441 | == _IO_pos_BAD && errno != ESPIPE) |
442 | return NULL; | |
11ed3eae | 443 | __set_errno (save_errno); |
96aa2d94 RM |
444 | return fp; |
445 | } | |
d18ea0c5 | 446 | libc_hidden_ver (_IO_new_file_attach, _IO_file_attach) |
96aa2d94 | 447 | |
40a55d20 | 448 | _IO_FILE * |
b259e746 | 449 | _IO_new_file_setbuf (fp, p, len) |
40a55d20 UD |
450 | _IO_FILE *fp; |
451 | char *p; | |
452 | _IO_ssize_t len; | |
96aa2d94 | 453 | { |
d64b6ad0 UD |
454 | if (_IO_default_setbuf (fp, p, len) == NULL) |
455 | return NULL; | |
96aa2d94 | 456 | |
d64b6ad0 UD |
457 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end |
458 | = fp->_IO_buf_base; | |
459 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 | 460 | |
d64b6ad0 | 461 | return fp; |
96aa2d94 | 462 | } |
d18ea0c5 | 463 | libc_hidden_ver (_IO_new_file_setbuf, _IO_file_setbuf) |
96aa2d94 | 464 | |
bff334e0 UD |
465 | |
466 | _IO_FILE * | |
467 | _IO_file_setbuf_mmap (fp, p, len) | |
468 | _IO_FILE *fp; | |
469 | char *p; | |
470 | _IO_ssize_t len; | |
471 | { | |
472 | _IO_FILE *result; | |
473 | ||
474 | /* Change the function table. */ | |
15a686af | 475 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
bff334e0 UD |
476 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
477 | ||
478 | /* And perform the normal operation. */ | |
479 | result = _IO_new_file_setbuf (fp, p, len); | |
480 | ||
481 | /* If the call failed, restore to using mmap. */ | |
482 | if (result == NULL) | |
483 | { | |
484 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap; | |
485 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
486 | } | |
487 | ||
488 | return result; | |
489 | } | |
490 | ||
0fca3153 | 491 | static _IO_size_t new_do_write (_IO_FILE *, const char *, _IO_size_t); |
0720f75c | 492 | |
96aa2d94 | 493 | /* Write TO_DO bytes from DATA to FP. |
68dbb3a6 | 494 | Then mark FP as having empty buffers. */ |
96aa2d94 RM |
495 | |
496 | int | |
b259e746 | 497 | _IO_new_do_write (fp, data, to_do) |
40a55d20 UD |
498 | _IO_FILE *fp; |
499 | const char *data; | |
500 | _IO_size_t to_do; | |
0720f75c | 501 | { |
6dd67bd5 UD |
502 | return (to_do == 0 |
503 | || (_IO_size_t) new_do_write (fp, data, to_do) == to_do) ? 0 : EOF; | |
0720f75c | 504 | } |
d18ea0c5 | 505 | libc_hidden_ver (_IO_new_do_write, _IO_do_write) |
0720f75c UD |
506 | |
507 | static | |
ccf3ea43 | 508 | _IO_size_t |
0720f75c UD |
509 | new_do_write (fp, data, to_do) |
510 | _IO_FILE *fp; | |
511 | const char *data; | |
512 | _IO_size_t to_do; | |
96aa2d94 RM |
513 | { |
514 | _IO_size_t count; | |
96aa2d94 RM |
515 | if (fp->_flags & _IO_IS_APPENDING) |
516 | /* On a system without a proper O_APPEND implementation, | |
517 | you would need to sys_seek(0, SEEK_END) here, but is | |
ded5b9b7 | 518 | not needed nor desirable for Unix- or Posix-like systems. |
96aa2d94 RM |
519 | Instead, just indicate that offset (before and after) is |
520 | unpredictable. */ | |
bd355af0 | 521 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 522 | else if (fp->_IO_read_end != fp->_IO_write_base) |
23396375 | 523 | { |
d64b6ad0 | 524 | _IO_off64_t new_pos |
40a55d20 | 525 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
96aa2d94 | 526 | if (new_pos == _IO_pos_BAD) |
0720f75c | 527 | return 0; |
bd355af0 | 528 | fp->_offset = new_pos; |
96aa2d94 RM |
529 | } |
530 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 531 | if (fp->_cur_column && count) |
d18ea0c5 | 532 | fp->_cur_column = _IO_adjust_column (fp->_cur_column - 1, data, count) + 1; |
40a55d20 | 533 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
96aa2d94 | 534 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; |
076bfcf6 | 535 | fp->_IO_write_end = (fp->_mode <= 0 |
d64b6ad0 | 536 | && (fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
40a55d20 | 537 | ? fp->_IO_buf_base : fp->_IO_buf_end); |
0720f75c | 538 | return count; |
96aa2d94 RM |
539 | } |
540 | ||
541 | int | |
b259e746 | 542 | _IO_new_file_underflow (fp) |
40a55d20 | 543 | _IO_FILE *fp; |
96aa2d94 RM |
544 | { |
545 | _IO_ssize_t count; | |
546 | #if 0 | |
547 | /* SysV does not make this test; take it out for compatibility */ | |
548 | if (fp->_flags & _IO_EOF_SEEN) | |
549 | return (EOF); | |
550 | #endif | |
551 | ||
552 | if (fp->_flags & _IO_NO_READS) | |
feb3c934 | 553 | { |
58034572 | 554 | fp->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
555 | __set_errno (EBADF); |
556 | return EOF; | |
557 | } | |
96aa2d94 | 558 | if (fp->_IO_read_ptr < fp->_IO_read_end) |
40a55d20 | 559 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 RM |
560 | |
561 | if (fp->_IO_buf_base == NULL) | |
00bc5db0 UD |
562 | { |
563 | /* Maybe we already have a push back pointer. */ | |
564 | if (fp->_IO_save_base != NULL) | |
565 | { | |
566 | free (fp->_IO_save_base); | |
567 | fp->_flags &= ~_IO_IN_BACKUP; | |
568 | } | |
d18ea0c5 | 569 | _IO_doallocbuf (fp); |
00bc5db0 | 570 | } |
96aa2d94 RM |
571 | |
572 | /* Flush all line buffered files before reading. */ | |
573 | /* FIXME This can/should be moved to genops ?? */ | |
574 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
3d759cb8 UD |
575 | { |
576 | #if 0 | |
d18ea0c5 | 577 | _IO_flush_all_linebuffered (); |
3d759cb8 UD |
578 | #else |
579 | /* We used to flush all line-buffered stream. This really isn't | |
580 | required by any standard. My recollection is that | |
581 | traditional Unix systems did this for stdout. stderr better | |
582 | not be line buffered. So we do just that here | |
583 | explicitly. --drepper */ | |
0261d33f | 584 | _IO_acquire_lock (_IO_stdout); |
3d759cb8 UD |
585 | |
586 | if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF)) | |
587 | == (_IO_LINKED | _IO_LINE_BUF)) | |
588 | _IO_OVERFLOW (_IO_stdout, EOF); | |
589 | ||
0261d33f | 590 | _IO_release_lock (_IO_stdout); |
3d759cb8 UD |
591 | #endif |
592 | } | |
96aa2d94 | 593 | |
d18ea0c5 | 594 | _IO_switch_to_get_mode (fp); |
96aa2d94 | 595 | |
2d7da676 UD |
596 | /* This is very tricky. We have to adjust those |
597 | pointers before we call _IO_SYSREAD () since | |
598 | we may longjump () out while waiting for | |
599 | input. Those pointers may be screwed up. H.J. */ | |
600 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
601 | fp->_IO_read_end = fp->_IO_buf_base; | |
602 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
603 | = fp->_IO_buf_base; | |
604 | ||
96aa2d94 RM |
605 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, |
606 | fp->_IO_buf_end - fp->_IO_buf_base); | |
607 | if (count <= 0) | |
608 | { | |
609 | if (count == 0) | |
610 | fp->_flags |= _IO_EOF_SEEN; | |
611 | else | |
612 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
613 | } | |
2d7da676 | 614 | fp->_IO_read_end += count; |
96aa2d94 RM |
615 | if (count == 0) |
616 | return EOF; | |
bd355af0 UD |
617 | if (fp->_offset != _IO_pos_BAD) |
618 | _IO_pos_adjust (fp->_offset, count); | |
40a55d20 | 619 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 | 620 | } |
d18ea0c5 | 621 | libc_hidden_ver (_IO_new_file_underflow, _IO_file_underflow) |
96aa2d94 | 622 | |
acbee5f6 RM |
623 | /* Guts of underflow callback if we mmap the file. This stats the file and |
624 | updates the stream state to match. In the normal case we return zero. | |
625 | If the file is no longer eligible for mmap, its jump tables are reset to | |
626 | the vanilla ones and we return nonzero. */ | |
627 | static int | |
628 | mmap_remap_check (_IO_FILE *fp) | |
0469311e | 629 | { |
c8450f70 | 630 | struct stat64 st; |
acbee5f6 RM |
631 | |
632 | if (_IO_SYSSTAT (fp, &st) == 0 | |
633 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
634 | /* Limit the file size to 1MB for 32-bit machines. */ | |
635 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)) | |
0469311e | 636 | { |
acbee5f6 RM |
637 | const size_t pagesize = __getpagesize (); |
638 | # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1)) | |
639 | if (ROUNDED (st.st_size) < ROUNDED (fp->_IO_buf_end | |
640 | - fp->_IO_buf_base)) | |
641 | { | |
642 | /* We can trim off some pages past the end of the file. */ | |
643 | (void) __munmap (fp->_IO_buf_base + ROUNDED (st.st_size), | |
644 | ROUNDED (fp->_IO_buf_end - fp->_IO_buf_base) | |
645 | - ROUNDED (st.st_size)); | |
646 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
647 | } | |
648 | else if (ROUNDED (st.st_size) > ROUNDED (fp->_IO_buf_end | |
649 | - fp->_IO_buf_base)) | |
650 | { | |
651 | /* The file added some pages. We need to remap it. */ | |
652 | void *p; | |
eaae7493 | 653 | #ifdef _G_HAVE_MREMAP |
acbee5f6 RM |
654 | p = __mremap (fp->_IO_buf_base, ROUNDED (fp->_IO_buf_end |
655 | - fp->_IO_buf_base), | |
656 | ROUNDED (st.st_size), MREMAP_MAYMOVE); | |
657 | if (p == MAP_FAILED) | |
658 | { | |
659 | (void) __munmap (fp->_IO_buf_base, | |
660 | fp->_IO_buf_end - fp->_IO_buf_base); | |
661 | goto punt; | |
662 | } | |
663 | #else | |
664 | (void) __munmap (fp->_IO_buf_base, | |
665 | fp->_IO_buf_end - fp->_IO_buf_base); | |
ced52c71 JM |
666 | p = __mmap64 (NULL, st.st_size, PROT_READ, MAP_SHARED, |
667 | fp->_fileno, 0); | |
acbee5f6 RM |
668 | if (p == MAP_FAILED) |
669 | goto punt; | |
670 | #endif | |
671 | fp->_IO_buf_base = p; | |
672 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
673 | } | |
674 | else | |
675 | { | |
676 | /* The number of pages didn't change. */ | |
677 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
678 | } | |
679 | # undef ROUNDED | |
680 | ||
681 | fp->_offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
fc77d66a RM |
682 | _IO_setg (fp, fp->_IO_buf_base, |
683 | fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base | |
684 | ? fp->_IO_buf_base + fp->_offset : fp->_IO_buf_end, | |
acbee5f6 | 685 | fp->_IO_buf_end); |
c4292489 | 686 | |
fc77d66a RM |
687 | /* If we are already positioned at or past the end of the file, don't |
688 | change the current offset. If not, seek past what we have mapped, | |
689 | mimicking the position left by a normal underflow reading into its | |
690 | buffer until EOF. */ | |
691 | ||
692 | if (fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base) | |
693 | { | |
ced52c71 JM |
694 | if (__lseek64 (fp->_fileno, fp->_IO_buf_end - fp->_IO_buf_base, |
695 | SEEK_SET) | |
fc77d66a RM |
696 | != fp->_IO_buf_end - fp->_IO_buf_base) |
697 | fp->_flags |= _IO_ERR_SEEN; | |
698 | else | |
699 | fp->_offset = fp->_IO_buf_end - fp->_IO_buf_base; | |
0469311e | 700 | } |
acbee5f6 RM |
701 | |
702 | return 0; | |
703 | } | |
704 | else | |
705 | { | |
706 | /* Life is no longer good for mmap. Punt it. */ | |
707 | (void) __munmap (fp->_IO_buf_base, | |
708 | fp->_IO_buf_end - fp->_IO_buf_base); | |
709 | punt: | |
710 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; | |
711 | _IO_setg (fp, NULL, NULL, NULL); | |
712 | if (fp->_mode <= 0) | |
15a686af | 713 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
acbee5f6 RM |
714 | else |
715 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
716 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
717 | ||
718 | return 1; | |
0469311e | 719 | } |
acbee5f6 RM |
720 | } |
721 | ||
722 | /* Special callback replacing the underflow callbacks if we mmap the file. */ | |
723 | int | |
724 | _IO_file_underflow_mmap (_IO_FILE *fp) | |
725 | { | |
726 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
727 | return *(unsigned char *) fp->_IO_read_ptr; | |
728 | ||
729 | if (__builtin_expect (mmap_remap_check (fp), 0)) | |
730 | /* We punted to the regular file functions. */ | |
731 | return _IO_UNDERFLOW (fp); | |
732 | ||
733 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
734 | return *(unsigned char *) fp->_IO_read_ptr; | |
0469311e UD |
735 | |
736 | fp->_flags |= _IO_EOF_SEEN; | |
737 | return EOF; | |
738 | } | |
739 | ||
acbee5f6 RM |
740 | static void |
741 | decide_maybe_mmap (_IO_FILE *fp) | |
742 | { | |
743 | /* We use the file in read-only mode. This could mean we can | |
744 | mmap the file and use it without any copying. But not all | |
745 | file descriptors are for mmap-able objects and on 32-bit | |
746 | machines we don't want to map files which are too large since | |
747 | this would require too much virtual memory. */ | |
c8450f70 | 748 | struct stat64 st; |
acbee5f6 RM |
749 | |
750 | if (_IO_SYSSTAT (fp, &st) == 0 | |
751 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
752 | /* Limit the file size to 1MB for 32-bit machines. */ | |
753 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024) | |
754 | /* Sanity check. */ | |
755 | && (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size)) | |
756 | { | |
757 | /* Try to map the file. */ | |
758 | void *p; | |
759 | ||
ced52c71 | 760 | p = __mmap64 (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); |
acbee5f6 RM |
761 | if (p != MAP_FAILED) |
762 | { | |
763 | /* OK, we managed to map the file. Set the buffer up and use a | |
764 | special jump table with simplified underflow functions which | |
765 | never tries to read anything from the file. */ | |
766 | ||
ced52c71 | 767 | if (__lseek64 (fp->_fileno, st.st_size, SEEK_SET) != st.st_size) |
acbee5f6 RM |
768 | { |
769 | (void) __munmap (p, st.st_size); | |
770 | fp->_offset = _IO_pos_BAD; | |
771 | } | |
772 | else | |
773 | { | |
d18ea0c5 | 774 | _IO_setb (fp, p, (char *) p + st.st_size, 0); |
acbee5f6 RM |
775 | |
776 | if (fp->_offset == _IO_pos_BAD) | |
777 | fp->_offset = 0; | |
778 | ||
779 | _IO_setg (fp, p, p + fp->_offset, p + st.st_size); | |
780 | fp->_offset = st.st_size; | |
781 | ||
782 | if (fp->_mode <= 0) | |
783 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_file_jumps_mmap; | |
784 | else | |
785 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_wfile_jumps_mmap; | |
786 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
787 | ||
788 | return; | |
789 | } | |
790 | } | |
791 | } | |
792 | ||
793 | /* We couldn't use mmap, so revert to the vanilla file operations. */ | |
794 | ||
795 | if (fp->_mode <= 0) | |
15a686af | 796 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
acbee5f6 RM |
797 | else |
798 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
799 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
800 | } | |
801 | ||
802 | int | |
803 | _IO_file_underflow_maybe_mmap (_IO_FILE *fp) | |
804 | { | |
805 | /* This is the first read attempt. Choose mmap or vanilla operations | |
806 | and then punt to the chosen underflow routine. */ | |
807 | decide_maybe_mmap (fp); | |
808 | return _IO_UNDERFLOW (fp); | |
809 | } | |
810 | ||
811 | ||
96aa2d94 | 812 | int |
b259e746 | 813 | _IO_new_file_overflow (f, ch) |
40a55d20 UD |
814 | _IO_FILE *f; |
815 | int ch; | |
96aa2d94 RM |
816 | { |
817 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
feb3c934 | 818 | { |
c131718c | 819 | f->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
820 | __set_errno (EBADF); |
821 | return EOF; | |
822 | } | |
96aa2d94 | 823 | /* If currently reading or no buffer allocated. */ |
34c5e4a1 | 824 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0 || f->_IO_write_base == NULL) |
96aa2d94 RM |
825 | { |
826 | /* Allocate a buffer if needed. */ | |
34c5e4a1 | 827 | if (f->_IO_write_base == NULL) |
96aa2d94 | 828 | { |
d18ea0c5 | 829 | _IO_doallocbuf (f); |
96aa2d94 RM |
830 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
831 | } | |
c6645251 UD |
832 | /* Otherwise must be currently reading. |
833 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
834 | logically slide the buffer forwards one block (by setting the | |
835 | read pointers to all point at the beginning of the block). This | |
836 | makes room for subsequent output. | |
837 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
838 | alone, so it can continue to correspond to the external position). */ | |
483b8cc6 UD |
839 | if (__builtin_expect (_IO_in_backup (f), 0)) |
840 | { | |
841 | size_t nbackup = f->_IO_read_end - f->_IO_read_ptr; | |
d18ea0c5 | 842 | _IO_free_backup_area (f); |
483b8cc6 UD |
843 | f->_IO_read_base -= MIN (nbackup, |
844 | f->_IO_read_base - f->_IO_buf_base); | |
845 | f->_IO_read_ptr = f->_IO_read_base; | |
846 | } | |
eb35b097 UD |
847 | |
848 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
849 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
850 | f->_IO_write_ptr = f->_IO_read_ptr; | |
851 | f->_IO_write_base = f->_IO_write_ptr; | |
852 | f->_IO_write_end = f->_IO_buf_end; | |
853 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
96aa2d94 | 854 | |
96aa2d94 | 855 | f->_flags |= _IO_CURRENTLY_PUTTING; |
076bfcf6 | 856 | if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
bfcd44c3 | 857 | f->_IO_write_end = f->_IO_write_ptr; |
96aa2d94 RM |
858 | } |
859 | if (ch == EOF) | |
d18ea0c5 AS |
860 | return _IO_do_write (f, f->_IO_write_base, |
861 | f->_IO_write_ptr - f->_IO_write_base); | |
96aa2d94 | 862 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
40a55d20 | 863 | if (_IO_do_flush (f) == EOF) |
96aa2d94 RM |
864 | return EOF; |
865 | *f->_IO_write_ptr++ = ch; | |
866 | if ((f->_flags & _IO_UNBUFFERED) | |
867 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
d18ea0c5 AS |
868 | if (_IO_do_write (f, f->_IO_write_base, |
869 | f->_IO_write_ptr - f->_IO_write_base) == EOF) | |
96aa2d94 | 870 | return EOF; |
40a55d20 | 871 | return (unsigned char) ch; |
96aa2d94 | 872 | } |
d18ea0c5 | 873 | libc_hidden_ver (_IO_new_file_overflow, _IO_file_overflow) |
96aa2d94 RM |
874 | |
875 | int | |
b259e746 | 876 | _IO_new_file_sync (fp) |
40a55d20 | 877 | _IO_FILE *fp; |
96aa2d94 | 878 | { |
a2bde807 | 879 | _IO_ssize_t delta; |
61eb22d3 UD |
880 | int retval = 0; |
881 | ||
96aa2d94 RM |
882 | /* char* ptr = cur_ptr(); */ |
883 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
884 | if (_IO_do_flush(fp)) return EOF; | |
23396375 | 885 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
96aa2d94 RM |
886 | if (delta != 0) |
887 | { | |
888 | #ifdef TODO | |
40a55d20 UD |
889 | if (_IO_in_backup (fp)) |
890 | delta -= eGptr () - Gbase (); | |
96aa2d94 | 891 | #endif |
dfd2257a UD |
892 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, delta, 1); |
893 | if (new_pos != (_IO_off64_t) EOF) | |
96aa2d94 RM |
894 | fp->_IO_read_end = fp->_IO_read_ptr; |
895 | #ifdef ESPIPE | |
896 | else if (errno == ESPIPE) | |
897 | ; /* Ignore error from unseekable devices. */ | |
898 | #endif | |
899 | else | |
61eb22d3 | 900 | retval = EOF; |
96aa2d94 | 901 | } |
61eb22d3 | 902 | if (retval != EOF) |
bd355af0 | 903 | fp->_offset = _IO_pos_BAD; |
96aa2d94 RM |
904 | /* FIXME: Cleanup - can this be shared? */ |
905 | /* setg(base(), ptr, ptr); */ | |
61eb22d3 | 906 | return retval; |
96aa2d94 | 907 | } |
d18ea0c5 | 908 | libc_hidden_ver (_IO_new_file_sync, _IO_file_sync) |
96aa2d94 | 909 | |
acbee5f6 RM |
910 | static int |
911 | _IO_file_sync_mmap (_IO_FILE *fp) | |
912 | { | |
913 | if (fp->_IO_read_ptr != fp->_IO_read_end) | |
914 | { | |
915 | #ifdef TODO | |
916 | if (_IO_in_backup (fp)) | |
917 | delta -= eGptr () - Gbase (); | |
918 | #endif | |
ced52c71 JM |
919 | if (__lseek64 (fp->_fileno, fp->_IO_read_ptr - fp->_IO_buf_base, |
920 | SEEK_SET) | |
acbee5f6 RM |
921 | != fp->_IO_read_ptr - fp->_IO_buf_base) |
922 | { | |
923 | fp->_flags |= _IO_ERR_SEEN; | |
924 | return EOF; | |
925 | } | |
926 | } | |
927 | fp->_offset = fp->_IO_read_ptr - fp->_IO_buf_base; | |
928 | fp->_IO_read_end = fp->_IO_read_ptr = fp->_IO_read_base; | |
929 | return 0; | |
930 | } | |
931 | ||
932 | ||
d64b6ad0 | 933 | _IO_off64_t |
b259e746 | 934 | _IO_new_file_seekoff (fp, offset, dir, mode) |
40a55d20 | 935 | _IO_FILE *fp; |
dfd2257a | 936 | _IO_off64_t offset; |
40a55d20 UD |
937 | int dir; |
938 | int mode; | |
96aa2d94 | 939 | { |
d64b6ad0 | 940 | _IO_off64_t result; |
dfd2257a | 941 | _IO_off64_t delta, new_offset; |
96aa2d94 | 942 | long count; |
feb3c934 UD |
943 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file |
944 | offset of the underlying file must be exact. */ | |
945 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
946 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
96aa2d94 | 947 | |
adb26fae SP |
948 | bool was_writing = (fp->_IO_write_ptr > fp->_IO_write_base |
949 | || _IO_in_put_mode (fp)); | |
950 | ||
96aa2d94 RM |
951 | if (mode == 0) |
952 | dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */ | |
953 | ||
954 | /* Flush unwritten characters. | |
955 | (This may do an unneeded write if we seek within the buffer. | |
956 | But to be able to switch to reading, we would need to set | |
2b4f00d1 | 957 | egptr to pptr. That can't be done in the current design, |
96aa2d94 RM |
958 | which assumes file_ptr() is eGptr. Anyway, since we probably |
959 | end up flushing when we close(), it doesn't make much difference.) | |
2b4f00d1 | 960 | FIXME: simulate mem-mapped files. */ |
adb26fae SP |
961 | else if (was_writing && _IO_switch_to_get_mode (fp)) |
962 | return EOF; | |
96aa2d94 RM |
963 | |
964 | if (fp->_IO_buf_base == NULL) | |
965 | { | |
00bc5db0 UD |
966 | /* It could be that we already have a pushback buffer. */ |
967 | if (fp->_IO_read_base != NULL) | |
968 | { | |
969 | free (fp->_IO_read_base); | |
970 | fp->_flags &= ~_IO_IN_BACKUP; | |
971 | } | |
d18ea0c5 | 972 | _IO_doallocbuf (fp); |
40a55d20 UD |
973 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
974 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 RM |
975 | } |
976 | ||
977 | switch (dir) | |
978 | { | |
979 | case _IO_seek_cur: | |
980 | /* Adjust for read-ahead (bytes is buffer). */ | |
adb26fae SP |
981 | if (mode != 0 || !was_writing) |
982 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
983 | else | |
984 | { | |
985 | /* _IO_read_end coincides with fp._offset, so the actual file position | |
986 | is fp._offset - (_IO_read_end - new_write_ptr). This is fine | |
987 | even if fp._offset is not set, since fp->_IO_read_end is then at | |
988 | _IO_buf_base and this adjustment is for unbuffered output. */ | |
989 | offset -= fp->_IO_read_end - fp->_IO_write_ptr; | |
990 | } | |
991 | ||
bd355af0 | 992 | if (fp->_offset == _IO_pos_BAD) |
b722481a EB |
993 | { |
994 | if (mode != 0) | |
995 | goto dumb; | |
996 | else | |
997 | { | |
998 | result = _IO_SYSSEEK (fp, 0, dir); | |
999 | if (result == EOF) | |
1000 | return result; | |
1001 | ||
1002 | fp->_offset = result; | |
1003 | } | |
1004 | } | |
96aa2d94 | 1005 | /* Make offset absolute, assuming current pointer is file_ptr(). */ |
d64b6ad0 | 1006 | offset += fp->_offset; |
405550bf UD |
1007 | if (offset < 0) |
1008 | { | |
1009 | __set_errno (EINVAL); | |
1010 | return EOF; | |
1011 | } | |
96aa2d94 RM |
1012 | |
1013 | dir = _IO_seek_set; | |
1014 | break; | |
1015 | case _IO_seek_set: | |
1016 | break; | |
1017 | case _IO_seek_end: | |
1018 | { | |
c8450f70 | 1019 | struct stat64 st; |
40a55d20 | 1020 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
96aa2d94 RM |
1021 | { |
1022 | offset += st.st_size; | |
1023 | dir = _IO_seek_set; | |
1024 | } | |
1025 | else | |
1026 | goto dumb; | |
1027 | } | |
1028 | } | |
1029 | /* At this point, dir==_IO_seek_set. */ | |
1030 | ||
00bc5db0 UD |
1031 | /* If we are only interested in the current position we've found it now. */ |
1032 | if (mode == 0) | |
1033 | return offset; | |
1034 | ||
96aa2d94 | 1035 | /* If destination is within current buffer, optimize: */ |
bd355af0 | 1036 | if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL |
96aa2d94 RM |
1037 | && !_IO_in_backup (fp)) |
1038 | { | |
c03c66dd UD |
1039 | _IO_off64_t start_offset = (fp->_offset |
1040 | - (fp->_IO_read_end - fp->_IO_buf_base)); | |
1041 | if (offset >= start_offset && offset < fp->_offset) | |
96aa2d94 | 1042 | { |
c03c66dd UD |
1043 | _IO_setg (fp, fp->_IO_buf_base, |
1044 | fp->_IO_buf_base + (offset - start_offset), | |
1045 | fp->_IO_read_end); | |
1046 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1047 | ||
00bc5db0 | 1048 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 1049 | goto resync; |
96aa2d94 | 1050 | } |
96aa2d94 RM |
1051 | } |
1052 | ||
96aa2d94 RM |
1053 | if (fp->_flags & _IO_NO_READS) |
1054 | goto dumb; | |
1055 | ||
1056 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
1057 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
1058 | delta = offset - new_offset; | |
1059 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
1060 | { | |
1061 | new_offset = offset; | |
1062 | delta = 0; | |
1063 | } | |
1064 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
1065 | if (result < 0) | |
1066 | return EOF; | |
1067 | if (delta == 0) | |
1068 | count = 0; | |
1069 | else | |
1070 | { | |
1071 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
feb3c934 UD |
1072 | (must_be_exact |
1073 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
96aa2d94 RM |
1074 | if (count < delta) |
1075 | { | |
1076 | /* We weren't allowed to read, but try to seek the remainder. */ | |
1077 | offset = count == EOF ? delta : delta-count; | |
1078 | dir = _IO_seek_cur; | |
1079 | goto dumb; | |
1080 | } | |
1081 | } | |
40a55d20 UD |
1082 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, |
1083 | fp->_IO_buf_base + count); | |
1084 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
bd355af0 | 1085 | fp->_offset = result + count; |
40a55d20 | 1086 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
96aa2d94 RM |
1087 | return offset; |
1088 | dumb: | |
1089 | ||
d18ea0c5 | 1090 | _IO_unsave_markers (fp); |
96aa2d94 RM |
1091 | result = _IO_SYSSEEK (fp, offset, dir); |
1092 | if (result != EOF) | |
d762684b UD |
1093 | { |
1094 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1095 | fp->_offset = result; | |
1096 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1097 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1098 | } | |
96aa2d94 | 1099 | return result; |
4a582094 UD |
1100 | |
1101 | resync: | |
1102 | /* We need to do it since it is possible that the file offset in | |
1103 | the kernel may be changed behind our back. It may happen when | |
1104 | we fopen a file and then do a fork. One process may access the | |
ded5b9b7 | 1105 | file and the kernel file offset will be changed. */ |
4a582094 UD |
1106 | if (fp->_offset >= 0) |
1107 | _IO_SYSSEEK (fp, fp->_offset, 0); | |
1108 | ||
1109 | return offset; | |
96aa2d94 | 1110 | } |
d18ea0c5 | 1111 | libc_hidden_ver (_IO_new_file_seekoff, _IO_file_seekoff) |
96aa2d94 | 1112 | |
284749da UD |
1113 | _IO_off64_t |
1114 | _IO_file_seekoff_mmap (fp, offset, dir, mode) | |
1115 | _IO_FILE *fp; | |
1116 | _IO_off64_t offset; | |
1117 | int dir; | |
1118 | int mode; | |
1119 | { | |
1120 | _IO_off64_t result; | |
1121 | ||
7e93f915 RM |
1122 | /* If we are only interested in the current position, calculate it and |
1123 | return right now. This calculation does the right thing when we are | |
1124 | using a pushback buffer, but in the usual case has the same value as | |
1125 | (fp->_IO_read_ptr - fp->_IO_buf_base). */ | |
284749da | 1126 | if (mode == 0) |
78ce5a3b | 1127 | return fp->_offset - (fp->_IO_read_end - fp->_IO_read_ptr); |
284749da UD |
1128 | |
1129 | switch (dir) | |
1130 | { | |
1131 | case _IO_seek_cur: | |
1132 | /* Adjust for read-ahead (bytes is buffer). */ | |
1133 | offset += fp->_IO_read_ptr - fp->_IO_read_base; | |
1134 | break; | |
1135 | case _IO_seek_set: | |
1136 | break; | |
1137 | case _IO_seek_end: | |
903b3396 | 1138 | offset += fp->_IO_buf_end - fp->_IO_buf_base; |
284749da UD |
1139 | break; |
1140 | } | |
1141 | /* At this point, dir==_IO_seek_set. */ | |
1142 | ||
1143 | if (offset < 0) | |
66bff409 UD |
1144 | { |
1145 | /* No negative offsets are valid. */ | |
1146 | __set_errno (EINVAL); | |
1147 | return EOF; | |
1148 | } | |
284749da | 1149 | |
284749da UD |
1150 | result = _IO_SYSSEEK (fp, offset, 0); |
1151 | if (result < 0) | |
1152 | return EOF; | |
1153 | ||
fc77d66a RM |
1154 | if (offset > fp->_IO_buf_end - fp->_IO_buf_base) |
1155 | /* One can fseek arbitrarily past the end of the file | |
1156 | and it is meaningless until one attempts to read. | |
1157 | Leave the buffer pointers in EOF state until underflow. */ | |
1158 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_end, fp->_IO_buf_end); | |
1159 | else | |
1160 | /* Adjust the read pointers to match the file position, | |
1161 | but so the next read attempt will call underflow. */ | |
1162 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + offset, | |
1163 | fp->_IO_buf_base + offset); | |
1164 | ||
66bff409 | 1165 | fp->_offset = result; |
284749da UD |
1166 | |
1167 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1168 | ||
1169 | return offset; | |
1170 | } | |
1171 | ||
f5bf21a7 UD |
1172 | static _IO_off64_t |
1173 | _IO_file_seekoff_maybe_mmap (_IO_FILE *fp, _IO_off64_t offset, int dir, | |
1174 | int mode) | |
acbee5f6 RM |
1175 | { |
1176 | /* We only get here when we haven't tried to read anything yet. | |
1177 | So there is nothing more useful for us to do here than just | |
1178 | the underlying lseek call. */ | |
1179 | ||
1180 | _IO_off64_t result = _IO_SYSSEEK (fp, offset, dir); | |
1181 | if (result < 0) | |
1182 | return EOF; | |
1183 | ||
1184 | fp->_offset = result; | |
1185 | return result; | |
1186 | } | |
1187 | ||
96aa2d94 | 1188 | _IO_ssize_t |
40a55d20 UD |
1189 | _IO_file_read (fp, buf, size) |
1190 | _IO_FILE *fp; | |
1191 | void *buf; | |
1192 | _IO_ssize_t size; | |
96aa2d94 | 1193 | { |
e3c54d80 | 1194 | return (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0) |
ee8449f7 UD |
1195 | ? read_not_cancel (fp->_fileno, buf, size) |
1196 | : read (fp->_fileno, buf, size)); | |
96aa2d94 | 1197 | } |
d18ea0c5 | 1198 | libc_hidden_def (_IO_file_read) |
96aa2d94 | 1199 | |
d64b6ad0 | 1200 | _IO_off64_t |
40a55d20 UD |
1201 | _IO_file_seek (fp, offset, dir) |
1202 | _IO_FILE *fp; | |
dfd2257a | 1203 | _IO_off64_t offset; |
40a55d20 | 1204 | int dir; |
96aa2d94 | 1205 | { |
ced52c71 | 1206 | return __lseek64 (fp->_fileno, offset, dir); |
96aa2d94 | 1207 | } |
d18ea0c5 | 1208 | libc_hidden_def (_IO_file_seek) |
96aa2d94 RM |
1209 | |
1210 | int | |
40a55d20 UD |
1211 | _IO_file_stat (fp, st) |
1212 | _IO_FILE *fp; | |
1213 | void *st; | |
96aa2d94 | 1214 | { |
ced52c71 | 1215 | return __fxstat64 (_STAT_VER, fp->_fileno, (struct stat64 *) st); |
96aa2d94 | 1216 | } |
d18ea0c5 | 1217 | libc_hidden_def (_IO_file_stat) |
96aa2d94 | 1218 | |
0469311e UD |
1219 | int |
1220 | _IO_file_close_mmap (fp) | |
1221 | _IO_FILE *fp; | |
1222 | { | |
acbee5f6 RM |
1223 | /* In addition to closing the file descriptor we have to unmap the file. */ |
1224 | (void) __munmap (fp->_IO_buf_base, fp->_IO_buf_end - fp->_IO_buf_base); | |
0469311e | 1225 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; |
73299943 UD |
1226 | /* Cancelling close should be avoided if possible since it leaves an |
1227 | unrecoverable state behind. */ | |
1228 | return close_not_cancel (fp->_fileno); | |
0469311e UD |
1229 | } |
1230 | ||
96aa2d94 | 1231 | int |
40a55d20 UD |
1232 | _IO_file_close (fp) |
1233 | _IO_FILE *fp; | |
96aa2d94 | 1234 | { |
73299943 UD |
1235 | /* Cancelling close should be avoided if possible since it leaves an |
1236 | unrecoverable state behind. */ | |
1237 | return close_not_cancel (fp->_fileno); | |
96aa2d94 | 1238 | } |
d18ea0c5 | 1239 | libc_hidden_def (_IO_file_close) |
96aa2d94 RM |
1240 | |
1241 | _IO_ssize_t | |
b259e746 | 1242 | _IO_new_file_write (f, data, n) |
40a55d20 UD |
1243 | _IO_FILE *f; |
1244 | const void *data; | |
1245 | _IO_ssize_t n; | |
96aa2d94 RM |
1246 | { |
1247 | _IO_ssize_t to_do = n; | |
1248 | while (to_do > 0) | |
1249 | { | |
3d110c7c EB |
1250 | _IO_ssize_t count = (__builtin_expect (f->_flags2 |
1251 | & _IO_FLAGS2_NOTCANCEL, 0) | |
1252 | ? write_not_cancel (f->_fileno, data, to_do) | |
1253 | : write (f->_fileno, data, to_do)); | |
d64b6ad0 | 1254 | if (count < 0) |
96aa2d94 | 1255 | { |
39e16978 UD |
1256 | f->_flags |= _IO_ERR_SEEN; |
1257 | break; | |
b722481a | 1258 | } |
96aa2d94 | 1259 | to_do -= count; |
40a55d20 | 1260 | data = (void *) ((char *) data + count); |
96aa2d94 RM |
1261 | } |
1262 | n -= to_do; | |
bd355af0 UD |
1263 | if (f->_offset >= 0) |
1264 | f->_offset += n; | |
3d110c7c | 1265 | return n; |
96aa2d94 RM |
1266 | } |
1267 | ||
1268 | _IO_size_t | |
b259e746 | 1269 | _IO_new_file_xsputn (f, data, n) |
40a55d20 UD |
1270 | _IO_FILE *f; |
1271 | const void *data; | |
1272 | _IO_size_t n; | |
96aa2d94 | 1273 | { |
2e09a79a | 1274 | const char *s = (const char *) data; |
96aa2d94 RM |
1275 | _IO_size_t to_do = n; |
1276 | int must_flush = 0; | |
cae6ebb2 | 1277 | _IO_size_t count = 0; |
96aa2d94 RM |
1278 | |
1279 | if (n <= 0) | |
1280 | return 0; | |
1281 | /* This is an optimized implementation. | |
1282 | If the amount to be written straddles a block boundary | |
1283 | (or the filebuf is unbuffered), use sys_write directly. */ | |
1284 | ||
1285 | /* First figure out how much space is available in the buffer. */ | |
96aa2d94 RM |
1286 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) |
1287 | { | |
1288 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
1289 | if (count >= n) | |
40a55d20 | 1290 | { |
2e09a79a | 1291 | const char *p; |
96aa2d94 RM |
1292 | for (p = s + n; p > s; ) |
1293 | { | |
40a55d20 UD |
1294 | if (*--p == '\n') |
1295 | { | |
1296 | count = p - s + 1; | |
1297 | must_flush = 1; | |
1298 | break; | |
1299 | } | |
96aa2d94 RM |
1300 | } |
1301 | } | |
1302 | } | |
cae6ebb2 UD |
1303 | else if (f->_IO_write_end > f->_IO_write_ptr) |
1304 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ | |
1305 | ||
96aa2d94 RM |
1306 | /* Then fill the buffer. */ |
1307 | if (count > 0) | |
1308 | { | |
1309 | if (count > to_do) | |
1310 | count = to_do; | |
86187531 | 1311 | #ifdef _LIBC |
20fde227 | 1312 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); |
86187531 | 1313 | #else |
20fde227 DM |
1314 | memcpy (f->_IO_write_ptr, s, count); |
1315 | f->_IO_write_ptr += count; | |
86187531 | 1316 | #endif |
20fde227 | 1317 | s += count; |
96aa2d94 RM |
1318 | to_do -= count; |
1319 | } | |
1320 | if (to_do + must_flush > 0) | |
40a55d20 | 1321 | { |
0720f75c | 1322 | _IO_size_t block_size, do_write; |
96aa2d94 | 1323 | /* Next flush the (full) buffer. */ |
5c8d1fc0 | 1324 | if (_IO_OVERFLOW (f, EOF) == EOF) |
3d110c7c EB |
1325 | /* If nothing else has to be written we must not signal the |
1326 | caller that everything has been written. */ | |
1327 | return to_do == 0 ? EOF : n - to_do; | |
96aa2d94 | 1328 | |
3d110c7c | 1329 | /* Try to maintain alignment: write a whole number of blocks. */ |
96aa2d94 | 1330 | block_size = f->_IO_buf_end - f->_IO_buf_base; |
0720f75c UD |
1331 | do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); |
1332 | ||
1333 | if (do_write) | |
b722481a | 1334 | { |
0720f75c UD |
1335 | count = new_do_write (f, s, do_write); |
1336 | to_do -= count; | |
1337 | if (count < do_write) | |
1338 | return n - to_do; | |
b722481a | 1339 | } |
23396375 | 1340 | |
96aa2d94 RM |
1341 | /* Now write out the remainder. Normally, this will fit in the |
1342 | buffer, but it's somewhat messier for line-buffered files, | |
1343 | so we let _IO_default_xsputn handle the general case. */ | |
0720f75c | 1344 | if (to_do) |
d18ea0c5 | 1345 | to_do -= _IO_default_xsputn (f, s+do_write, to_do); |
96aa2d94 RM |
1346 | } |
1347 | return n - to_do; | |
1348 | } | |
d18ea0c5 | 1349 | libc_hidden_ver (_IO_new_file_xsputn, _IO_file_xsputn) |
96aa2d94 | 1350 | |
96aa2d94 | 1351 | _IO_size_t |
40a55d20 UD |
1352 | _IO_file_xsgetn (fp, data, n) |
1353 | _IO_FILE *fp; | |
1354 | void *data; | |
1355 | _IO_size_t n; | |
96aa2d94 | 1356 | { |
2e09a79a JM |
1357 | _IO_size_t want, have; |
1358 | _IO_ssize_t count; | |
1359 | char *s = data; | |
8fe0fd03 UD |
1360 | |
1361 | want = n; | |
1362 | ||
310f9518 UD |
1363 | if (fp->_IO_buf_base == NULL) |
1364 | { | |
1365 | /* Maybe we already have a push back pointer. */ | |
1366 | if (fp->_IO_save_base != NULL) | |
1367 | { | |
1368 | free (fp->_IO_save_base); | |
1369 | fp->_flags &= ~_IO_IN_BACKUP; | |
1370 | } | |
d18ea0c5 | 1371 | _IO_doallocbuf (fp); |
310f9518 UD |
1372 | } |
1373 | ||
8fe0fd03 | 1374 | while (want > 0) |
96aa2d94 | 1375 | { |
8fe0fd03 UD |
1376 | have = fp->_IO_read_end - fp->_IO_read_ptr; |
1377 | if (want <= have) | |
96aa2d94 | 1378 | { |
8fe0fd03 UD |
1379 | memcpy (s, fp->_IO_read_ptr, want); |
1380 | fp->_IO_read_ptr += want; | |
1381 | want = 0; | |
1382 | } | |
1383 | else | |
1384 | { | |
1385 | if (have > 0) | |
96aa2d94 | 1386 | { |
279eb600 UD |
1387 | #ifdef _LIBC |
1388 | s = __mempcpy (s, fp->_IO_read_ptr, have); | |
1389 | #else | |
8fe0fd03 | 1390 | memcpy (s, fp->_IO_read_ptr, have); |
8fe0fd03 | 1391 | s += have; |
279eb600 UD |
1392 | #endif |
1393 | want -= have; | |
8fe0fd03 | 1394 | fp->_IO_read_ptr += have; |
96aa2d94 | 1395 | } |
8fe0fd03 UD |
1396 | |
1397 | /* Check for backup and repeat */ | |
1398 | if (_IO_in_backup (fp)) | |
96aa2d94 | 1399 | { |
8fe0fd03 UD |
1400 | _IO_switch_to_main_get_area (fp); |
1401 | continue; | |
1402 | } | |
1403 | ||
1404 | /* If we now want less than a buffer, underflow and repeat | |
1405 | the copy. Otherwise, _IO_SYSREAD directly to | |
1406 | the user buffer. */ | |
6dd67bd5 UD |
1407 | if (fp->_IO_buf_base |
1408 | && want < (size_t) (fp->_IO_buf_end - fp->_IO_buf_base)) | |
8fe0fd03 UD |
1409 | { |
1410 | if (__underflow (fp) == EOF) | |
1411 | break; | |
1412 | ||
1413 | continue; | |
1414 | } | |
1415 | ||
4bca4c17 UD |
1416 | /* These must be set before the sysread as we might longjmp out |
1417 | waiting for input. */ | |
1418 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1419 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1420 | ||
279eb600 UD |
1421 | /* Try to maintain alignment: read a whole number of blocks. */ |
1422 | count = want; | |
1423 | if (fp->_IO_buf_base) | |
1424 | { | |
1425 | _IO_size_t block_size = fp->_IO_buf_end - fp->_IO_buf_base; | |
1426 | if (block_size >= 128) | |
1427 | count -= want % block_size; | |
1428 | } | |
1429 | ||
1430 | count = _IO_SYSREAD (fp, s, count); | |
96aa2d94 | 1431 | if (count <= 0) |
8fe0fd03 UD |
1432 | { |
1433 | if (count == 0) | |
1434 | fp->_flags |= _IO_EOF_SEEN; | |
1435 | else | |
1436 | fp->_flags |= _IO_ERR_SEEN; | |
1437 | ||
1438 | break; | |
1439 | } | |
23396375 | 1440 | |
96aa2d94 | 1441 | s += count; |
8fe0fd03 | 1442 | want -= count; |
4bca4c17 UD |
1443 | if (fp->_offset != _IO_pos_BAD) |
1444 | _IO_pos_adjust (fp->_offset, count); | |
96aa2d94 | 1445 | } |
96aa2d94 | 1446 | } |
8fe0fd03 UD |
1447 | |
1448 | return n - want; | |
96aa2d94 | 1449 | } |
d18ea0c5 | 1450 | libc_hidden_def (_IO_file_xsgetn) |
96aa2d94 | 1451 | |
0fca3153 | 1452 | static _IO_size_t _IO_file_xsgetn_mmap (_IO_FILE *, void *, _IO_size_t); |
284749da UD |
1453 | static _IO_size_t |
1454 | _IO_file_xsgetn_mmap (fp, data, n) | |
1455 | _IO_FILE *fp; | |
1456 | void *data; | |
1457 | _IO_size_t n; | |
1458 | { | |
2e09a79a | 1459 | _IO_size_t have; |
284749da | 1460 | char *read_ptr = fp->_IO_read_ptr; |
2e09a79a | 1461 | char *s = (char *) data; |
284749da UD |
1462 | |
1463 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1464 | ||
1465 | if (have < n) | |
1466 | { | |
b39d5719 UD |
1467 | if (__builtin_expect (_IO_in_backup (fp), 0)) |
1468 | { | |
1469 | #ifdef _LIBC | |
1470 | s = __mempcpy (s, read_ptr, have); | |
1471 | #else | |
1472 | memcpy (s, read_ptr, have); | |
1473 | s += have; | |
1474 | #endif | |
1475 | n -= have; | |
1476 | _IO_switch_to_main_get_area (fp); | |
1477 | read_ptr = fp->_IO_read_ptr; | |
1478 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1479 | } | |
1480 | ||
1481 | if (have < n) | |
1482 | { | |
acbee5f6 RM |
1483 | /* Check that we are mapping all of the file, in case it grew. */ |
1484 | if (__builtin_expect (mmap_remap_check (fp), 0)) | |
1485 | /* We punted mmap, so complete with the vanilla code. */ | |
1486 | return s - (char *) data + _IO_XSGETN (fp, data, n); | |
1487 | ||
1488 | read_ptr = fp->_IO_read_ptr; | |
1489 | have = fp->_IO_read_end - read_ptr; | |
b39d5719 | 1490 | } |
284749da UD |
1491 | } |
1492 | ||
c4292489 UD |
1493 | if (have < n) |
1494 | fp->_flags |= _IO_EOF_SEEN; | |
1495 | ||
1496 | if (have != 0) | |
284749da UD |
1497 | { |
1498 | have = MIN (have, n); | |
b39d5719 UD |
1499 | #ifdef _LIBC |
1500 | s = __mempcpy (s, read_ptr, have); | |
1501 | #else | |
1502 | memcpy (s, read_ptr, have); | |
1503 | s += have; | |
1504 | #endif | |
284749da UD |
1505 | fp->_IO_read_ptr = read_ptr + have; |
1506 | } | |
1507 | ||
b39d5719 | 1508 | return s - (char *) data; |
284749da UD |
1509 | } |
1510 | ||
0fca3153 | 1511 | static _IO_size_t _IO_file_xsgetn_maybe_mmap (_IO_FILE *, void *, _IO_size_t); |
acbee5f6 RM |
1512 | static _IO_size_t |
1513 | _IO_file_xsgetn_maybe_mmap (fp, data, n) | |
1514 | _IO_FILE *fp; | |
1515 | void *data; | |
1516 | _IO_size_t n; | |
1517 | { | |
1518 | /* We only get here if this is the first attempt to read something. | |
1519 | Decide which operations to use and then punt to the chosen one. */ | |
1520 | ||
1521 | decide_maybe_mmap (fp); | |
1522 | return _IO_XSGETN (fp, data, n); | |
1523 | } | |
1524 | ||
94b68ee9 RM |
1525 | #ifdef _LIBC |
1526 | versioned_symbol (libc, _IO_new_do_write, _IO_do_write, GLIBC_2_1); | |
1527 | versioned_symbol (libc, _IO_new_file_attach, _IO_file_attach, GLIBC_2_1); | |
1528 | versioned_symbol (libc, _IO_new_file_close_it, _IO_file_close_it, GLIBC_2_1); | |
1529 | versioned_symbol (libc, _IO_new_file_finish, _IO_file_finish, GLIBC_2_1); | |
1530 | versioned_symbol (libc, _IO_new_file_fopen, _IO_file_fopen, GLIBC_2_1); | |
1531 | versioned_symbol (libc, _IO_new_file_init, _IO_file_init, GLIBC_2_1); | |
1532 | versioned_symbol (libc, _IO_new_file_setbuf, _IO_file_setbuf, GLIBC_2_1); | |
1533 | versioned_symbol (libc, _IO_new_file_sync, _IO_file_sync, GLIBC_2_1); | |
1534 | versioned_symbol (libc, _IO_new_file_overflow, _IO_file_overflow, GLIBC_2_1); | |
1535 | versioned_symbol (libc, _IO_new_file_seekoff, _IO_file_seekoff, GLIBC_2_1); | |
1536 | versioned_symbol (libc, _IO_new_file_underflow, _IO_file_underflow, GLIBC_2_1); | |
1537 | versioned_symbol (libc, _IO_new_file_write, _IO_file_write, GLIBC_2_1); | |
1538 | versioned_symbol (libc, _IO_new_file_xsputn, _IO_file_xsputn, GLIBC_2_1); | |
1539 | #endif | |
1540 | ||
b2637a22 | 1541 | const struct _IO_jump_t _IO_file_jumps = |
40a55d20 | 1542 | { |
96aa2d94 | 1543 | JUMP_INIT_DUMMY, |
d18ea0c5 AS |
1544 | JUMP_INIT(finish, _IO_file_finish), |
1545 | JUMP_INIT(overflow, _IO_file_overflow), | |
1546 | JUMP_INIT(underflow, _IO_file_underflow), | |
1547 | JUMP_INIT(uflow, _IO_default_uflow), | |
1548 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
1549 | JUMP_INIT(xsputn, _IO_file_xsputn), | |
1550 | JUMP_INIT(xsgetn, _IO_file_xsgetn), | |
b259e746 | 1551 | JUMP_INIT(seekoff, _IO_new_file_seekoff), |
96aa2d94 | 1552 | JUMP_INIT(seekpos, _IO_default_seekpos), |
b259e746 UD |
1553 | JUMP_INIT(setbuf, _IO_new_file_setbuf), |
1554 | JUMP_INIT(sync, _IO_new_file_sync), | |
d18ea0c5 AS |
1555 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1556 | JUMP_INIT(read, _IO_file_read), | |
b259e746 | 1557 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 AS |
1558 | JUMP_INIT(seek, _IO_file_seek), |
1559 | JUMP_INIT(close, _IO_file_close), | |
1560 | JUMP_INIT(stat, _IO_file_stat), | |
dfd2257a | 1561 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
0469311e UD |
1562 | JUMP_INIT(imbue, _IO_default_imbue) |
1563 | }; | |
15a686af | 1564 | libc_hidden_data_def (_IO_file_jumps) |
0469311e | 1565 | |
b2637a22 | 1566 | const struct _IO_jump_t _IO_file_jumps_mmap = |
0469311e UD |
1567 | { |
1568 | JUMP_INIT_DUMMY, | |
d18ea0c5 AS |
1569 | JUMP_INIT(finish, _IO_file_finish), |
1570 | JUMP_INIT(overflow, _IO_file_overflow), | |
0469311e | 1571 | JUMP_INIT(underflow, _IO_file_underflow_mmap), |
d18ea0c5 AS |
1572 | JUMP_INIT(uflow, _IO_default_uflow), |
1573 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
0469311e | 1574 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
284749da UD |
1575 | JUMP_INIT(xsgetn, _IO_file_xsgetn_mmap), |
1576 | JUMP_INIT(seekoff, _IO_file_seekoff_mmap), | |
0469311e | 1577 | JUMP_INIT(seekpos, _IO_default_seekpos), |
bff334e0 | 1578 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), |
acbee5f6 | 1579 | JUMP_INIT(sync, _IO_file_sync_mmap), |
d18ea0c5 AS |
1580 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1581 | JUMP_INIT(read, _IO_file_read), | |
0469311e | 1582 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 | 1583 | JUMP_INIT(seek, _IO_file_seek), |
0469311e | 1584 | JUMP_INIT(close, _IO_file_close_mmap), |
d18ea0c5 | 1585 | JUMP_INIT(stat, _IO_file_stat), |
0469311e | 1586 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
acbee5f6 RM |
1587 | JUMP_INIT(imbue, _IO_default_imbue) |
1588 | }; | |
1589 | ||
b2637a22 | 1590 | const struct _IO_jump_t _IO_file_jumps_maybe_mmap = |
acbee5f6 RM |
1591 | { |
1592 | JUMP_INIT_DUMMY, | |
d18ea0c5 AS |
1593 | JUMP_INIT(finish, _IO_file_finish), |
1594 | JUMP_INIT(overflow, _IO_file_overflow), | |
acbee5f6 | 1595 | JUMP_INIT(underflow, _IO_file_underflow_maybe_mmap), |
d18ea0c5 AS |
1596 | JUMP_INIT(uflow, _IO_default_uflow), |
1597 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
acbee5f6 RM |
1598 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
1599 | JUMP_INIT(xsgetn, _IO_file_xsgetn_maybe_mmap), | |
1600 | JUMP_INIT(seekoff, _IO_file_seekoff_maybe_mmap), | |
1601 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
1602 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), | |
1603 | JUMP_INIT(sync, _IO_new_file_sync), | |
d18ea0c5 AS |
1604 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1605 | JUMP_INIT(read, _IO_file_read), | |
acbee5f6 | 1606 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 | 1607 | JUMP_INIT(seek, _IO_file_seek), |
acbee5f6 | 1608 | JUMP_INIT(close, _IO_file_close), |
d18ea0c5 | 1609 | JUMP_INIT(stat, _IO_file_stat), |
acbee5f6 | 1610 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
dfd2257a | 1611 | JUMP_INIT(imbue, _IO_default_imbue) |
96aa2d94 | 1612 | }; |