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bfff8b1b | 1 | /* Copyright (C) 1993-2017 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> |
8ae4bb5a | 35 | #include <sys/mman.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 | 42 | #include <stdlib.h> |
4e2e9999 UD |
43 | #if _LIBC |
44 | # include "../wcsmbs/wcsmbsload.h" | |
129d706d UD |
45 | # include "../iconv/gconv_charset.h" |
46 | # include "../iconv/gconv_int.h" | |
0bf98029 | 47 | # include <shlib-compat.h> |
73299943 | 48 | # include <not-cancel.h> |
37233df9 | 49 | # include <kernel-features.h> |
4e2e9999 | 50 | #endif |
96aa2d94 RM |
51 | #ifndef errno |
52 | extern int errno; | |
53 | #endif | |
4547c1a4 UD |
54 | #ifndef __set_errno |
55 | # define __set_errno(Val) errno = (Val) | |
56 | #endif | |
96aa2d94 | 57 | |
68dbb3a6 UD |
58 | |
59 | #ifdef _LIBC | |
61eb22d3 | 60 | # define open(Name, Flags, Prot) __open (Name, Flags, Prot) |
61eb22d3 UD |
61 | # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) |
62 | # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) | |
63 | # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) | |
319d719d UD |
64 | #else |
65 | # define _IO_new_do_write _IO_do_write | |
66 | # define _IO_new_file_attach _IO_file_attach | |
67 | # define _IO_new_file_close_it _IO_file_close_it | |
68 | # define _IO_new_file_finish _IO_file_finish | |
69 | # define _IO_new_file_fopen _IO_file_fopen | |
70 | # define _IO_new_file_init _IO_file_init | |
71 | # define _IO_new_file_setbuf _IO_file_setbuf | |
72 | # define _IO_new_file_sync _IO_file_sync | |
73 | # define _IO_new_file_overflow _IO_file_overflow | |
74 | # define _IO_new_file_seekoff _IO_file_seekoff | |
75 | # define _IO_new_file_underflow _IO_file_underflow | |
76 | # define _IO_new_file_write _IO_file_write | |
77 | # define _IO_new_file_xsputn _IO_file_xsputn | |
68dbb3a6 UD |
78 | #endif |
79 | ||
129d706d UD |
80 | |
81 | #ifdef _LIBC | |
ab26a24a | 82 | extern struct __gconv_trans_data __libio_translit attribute_hidden; |
129d706d UD |
83 | #endif |
84 | ||
85 | ||
96aa2d94 RM |
86 | /* An fstream can be in at most one of put mode, get mode, or putback mode. |
87 | Putback mode is a variant of get mode. | |
88 | ||
89 | In a filebuf, there is only one current position, instead of two | |
6d52618b | 90 | separate get and put pointers. In get mode, the current position |
96aa2d94 RM |
91 | is that of gptr(); in put mode that of pptr(). |
92 | ||
93 | The position in the buffer that corresponds to the position | |
a18f587d | 94 | in external file system is normally _IO_read_end, except in putback |
2482ae43 SP |
95 | mode, when it is _IO_save_end and also when the file is in append mode, |
96 | since switching from read to write mode automatically sends the position in | |
97 | the external file system to the end of file. | |
96aa2d94 RM |
98 | If the field _fb._offset is >= 0, it gives the offset in |
99 | the file as a whole corresponding to eGptr(). (?) | |
100 | ||
101 | PUT MODE: | |
a18f587d UD |
102 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, |
103 | and _IO_read_base are equal to each other. These are usually equal | |
104 | to _IO_buf_base, though not necessarily if we have switched from | |
105 | get mode to put mode. (The reason is to maintain the invariant | |
106 | that _IO_read_end corresponds to the external file position.) | |
1ffb8c90 | 107 | _IO_write_base is non-NULL and usually equal to _IO_buf_base. |
a18f587d UD |
108 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. |
109 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
110 | ||
96aa2d94 RM |
111 | GET MODE: |
112 | If a filebuf is in get or putback mode, eback() != egptr(). | |
113 | In get mode, the unread characters are between gptr() and egptr(). | |
114 | The OS file position corresponds to that of egptr(). | |
a18f587d | 115 | |
96aa2d94 RM |
116 | PUTBACK MODE: |
117 | Putback mode is used to remember "excess" characters that have | |
118 | been sputbackc'd in a separate putback buffer. | |
119 | In putback mode, the get buffer points to the special putback buffer. | |
120 | The unread characters are the characters between gptr() and egptr() | |
121 | in the putback buffer, as well as the area between save_gptr() | |
122 | and save_egptr(), which point into the original reserve buffer. | |
123 | (The pointers save_gptr() and save_egptr() are the values | |
124 | of gptr() and egptr() at the time putback mode was entered.) | |
125 | The OS position corresponds to that of save_egptr(). | |
23396375 | 126 | |
96aa2d94 | 127 | LINE BUFFERED OUTPUT: |
a18f587d | 128 | During line buffered output, _IO_write_base==base() && epptr()==base(). |
96aa2d94 RM |
129 | However, ptr() may be anywhere between base() and ebuf(). |
130 | This forces a call to filebuf::overflow(int C) on every put. | |
131 | If there is more space in the buffer, and C is not a '\n', | |
132 | then C is inserted, and pptr() incremented. | |
23396375 | 133 | |
96aa2d94 RM |
134 | UNBUFFERED STREAMS: |
135 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
136 | */ | |
137 | ||
138 | #define CLOSED_FILEBUF_FLAGS \ | |
139 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
140 | ||
141 | ||
142 | void | |
db3476af | 143 | _IO_new_file_init_internal (struct _IO_FILE_plus *fp) |
96aa2d94 RM |
144 | { |
145 | /* POSIX.1 allows another file handle to be used to change the position | |
146 | of our file descriptor. Hence we actually don't know the actual | |
147 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
148 | fp->file._offset = _IO_pos_BAD; |
149 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
96aa2d94 | 150 | |
d18ea0c5 | 151 | _IO_link_in (fp); |
2ca8b1ee | 152 | fp->file._fileno = -1; |
96aa2d94 | 153 | } |
db3476af FW |
154 | |
155 | /* External version of _IO_new_file_init_internal which switches off | |
156 | vtable validation. */ | |
157 | void | |
158 | _IO_new_file_init (struct _IO_FILE_plus *fp) | |
159 | { | |
160 | IO_set_accept_foreign_vtables (&_IO_vtable_check); | |
161 | _IO_new_file_init_internal (fp); | |
162 | } | |
96aa2d94 RM |
163 | |
164 | int | |
24b97882 | 165 | _IO_new_file_close_it (_IO_FILE *fp) |
96aa2d94 | 166 | { |
eb6cbd24 | 167 | int write_status; |
40a55d20 | 168 | if (!_IO_file_is_open (fp)) |
96aa2d94 RM |
169 | return EOF; |
170 | ||
eb6cbd24 MF |
171 | if ((fp->_flags & _IO_NO_WRITES) == 0 |
172 | && (fp->_flags & _IO_CURRENTLY_PUTTING) != 0) | |
3384a8d6 | 173 | write_status = _IO_do_flush (fp); |
ca408c15 UD |
174 | else |
175 | write_status = 0; | |
96aa2d94 | 176 | |
d18ea0c5 | 177 | _IO_unsave_markers (fp); |
96aa2d94 | 178 | |
94b7cc37 UD |
179 | int close_status = ((fp->_flags2 & _IO_FLAGS2_NOCLOSE) == 0 |
180 | ? _IO_SYSCLOSE (fp) : 0); | |
96aa2d94 RM |
181 | |
182 | /* Free buffer. */ | |
319d719d | 183 | #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
1e88bd0f | 184 | if (fp->_mode > 0) |
d64b6ad0 | 185 | { |
44c4ccbc | 186 | if (_IO_have_wbackup (fp)) |
d18ea0c5 AS |
187 | _IO_free_wbackup_area (fp); |
188 | _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 |
d18ea0c5 | 193 | _IO_setb (fp, NULL, NULL, 0); |
1e88bd0f UD |
194 | _IO_setg (fp, NULL, NULL, NULL); |
195 | _IO_setp (fp, NULL, NULL); | |
96aa2d94 | 196 | |
d18ea0c5 | 197 | _IO_un_link ((struct _IO_FILE_plus *) fp); |
96aa2d94 | 198 | fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; |
110215a9 | 199 | fp->_fileno = -1; |
bd355af0 | 200 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 201 | |
fa0bc87c | 202 | return close_status ? close_status : write_status; |
96aa2d94 | 203 | } |
d18ea0c5 | 204 | libc_hidden_ver (_IO_new_file_close_it, _IO_file_close_it) |
96aa2d94 RM |
205 | |
206 | void | |
24b97882 | 207 | _IO_new_file_finish (_IO_FILE *fp, int dummy) |
96aa2d94 | 208 | { |
40a55d20 | 209 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
210 | { |
211 | _IO_do_flush (fp); | |
212 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) | |
213 | _IO_SYSCLOSE (fp); | |
214 | } | |
d18ea0c5 | 215 | _IO_default_finish (fp, 0); |
96aa2d94 | 216 | } |
d18ea0c5 | 217 | libc_hidden_ver (_IO_new_file_finish, _IO_file_finish) |
96aa2d94 | 218 | |
bd355af0 | 219 | _IO_FILE * |
24b97882 SP |
220 | _IO_file_open (_IO_FILE *fp, const char *filename, int posix_mode, int prot, |
221 | int read_write, int is32not64) | |
bd355af0 UD |
222 | { |
223 | int fdesc; | |
ee8449f7 | 224 | #ifdef _LIBC |
a1ffb40e | 225 | if (__glibc_unlikely (fp->_flags2 & _IO_FLAGS2_NOTCANCEL)) |
ee8449f7 UD |
226 | fdesc = open_not_cancel (filename, |
227 | posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
228 | else | |
229 | fdesc = open (filename, posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
bd355af0 UD |
230 | #else |
231 | fdesc = open (filename, posix_mode, prot); | |
232 | #endif | |
233 | if (fdesc < 0) | |
234 | return NULL; | |
235 | fp->_fileno = fdesc; | |
236 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
ea33158c SP |
237 | /* For append mode, send the file offset to the end of the file. Don't |
238 | update the offset cache though, since the file handle is not active. */ | |
239 | if ((read_write & (_IO_IS_APPENDING | _IO_NO_READS)) | |
240 | == (_IO_IS_APPENDING | _IO_NO_READS)) | |
241 | { | |
242 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, 0, _IO_seek_end); | |
243 | if (new_pos == _IO_pos_BAD && errno != ESPIPE) | |
244 | { | |
245 | close_not_cancel (fdesc); | |
246 | return NULL; | |
247 | } | |
248 | } | |
d18ea0c5 | 249 | _IO_link_in ((struct _IO_FILE_plus *) fp); |
bd355af0 UD |
250 | return fp; |
251 | } | |
ee2a5ae8 | 252 | libc_hidden_def (_IO_file_open) |
bd355af0 | 253 | |
96aa2d94 | 254 | _IO_FILE * |
24b97882 SP |
255 | _IO_new_file_fopen (_IO_FILE *fp, const char *filename, const char *mode, |
256 | int is32not64) | |
96aa2d94 RM |
257 | { |
258 | int oflags = 0, omode; | |
bd355af0 | 259 | int read_write; |
96aa2d94 | 260 | int oprot = 0666; |
f38931a9 | 261 | int i; |
4e2e9999 | 262 | _IO_FILE *result; |
129d706d | 263 | #ifdef _LIBC |
4e2e9999 | 264 | const char *cs; |
129d706d | 265 | const char *last_recognized; |
4e2e9999 UD |
266 | #endif |
267 | ||
96aa2d94 RM |
268 | if (_IO_file_is_open (fp)) |
269 | return 0; | |
f38931a9 | 270 | switch (*mode) |
40a55d20 UD |
271 | { |
272 | case 'r': | |
273 | omode = O_RDONLY; | |
274 | read_write = _IO_NO_WRITES; | |
275 | break; | |
276 | case 'w': | |
277 | omode = O_WRONLY; | |
278 | oflags = O_CREAT|O_TRUNC; | |
279 | read_write = _IO_NO_READS; | |
280 | break; | |
281 | case 'a': | |
282 | omode = O_WRONLY; | |
283 | oflags = O_CREAT|O_APPEND; | |
284 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
285 | break; | |
286 | default: | |
287 | __set_errno (EINVAL); | |
288 | return NULL; | |
289 | } | |
129d706d UD |
290 | #ifdef _LIBC |
291 | last_recognized = mode; | |
292 | #endif | |
b722481a | 293 | for (i = 1; i < 7; ++i) |
40a55d20 | 294 | { |
f38931a9 UD |
295 | switch (*++mode) |
296 | { | |
297 | case '\0': | |
298 | break; | |
299 | case '+': | |
300 | omode = O_RDWR; | |
301 | read_write &= _IO_IS_APPENDING; | |
129d706d UD |
302 | #ifdef _LIBC |
303 | last_recognized = mode; | |
304 | #endif | |
f38931a9 UD |
305 | continue; |
306 | case 'x': | |
307 | oflags |= O_EXCL; | |
129d706d UD |
308 | #ifdef _LIBC |
309 | last_recognized = mode; | |
310 | #endif | |
f38931a9 UD |
311 | continue; |
312 | case 'b': | |
129d706d UD |
313 | #ifdef _LIBC |
314 | last_recognized = mode; | |
315 | #endif | |
b7fc6d07 UD |
316 | continue; |
317 | case 'm': | |
318 | fp->_flags2 |= _IO_FLAGS2_MMAP; | |
319 | continue; | |
ee8449f7 UD |
320 | case 'c': |
321 | fp->_flags2 |= _IO_FLAGS2_NOTCANCEL; | |
0d74e043 | 322 | continue; |
65d834b0 | 323 | case 'e': |
94b7cc37 | 324 | #ifdef O_CLOEXEC |
65d834b0 | 325 | oflags |= O_CLOEXEC; |
65d834b0 | 326 | #endif |
94b7cc37 UD |
327 | fp->_flags2 |= _IO_FLAGS2_CLOEXEC; |
328 | continue; | |
f38931a9 UD |
329 | default: |
330 | /* Ignore. */ | |
331 | continue; | |
332 | } | |
333 | break; | |
40a55d20 | 334 | } |
f38931a9 | 335 | |
4e2e9999 UD |
336 | result = _IO_file_open (fp, filename, omode|oflags, oprot, read_write, |
337 | is32not64); | |
338 | ||
a101b025 | 339 | if (result != NULL) |
94b7cc37 | 340 | { |
a101b025 AJ |
341 | #ifndef __ASSUME_O_CLOEXEC |
342 | if ((fp->_flags2 & _IO_FLAGS2_CLOEXEC) != 0 && __have_o_cloexec <= 0) | |
94b7cc37 | 343 | { |
a101b025 AJ |
344 | int fd = _IO_fileno (fp); |
345 | if (__have_o_cloexec == 0) | |
346 | { | |
347 | int flags = __fcntl (fd, F_GETFD); | |
348 | __have_o_cloexec = (flags & FD_CLOEXEC) == 0 ? -1 : 1; | |
349 | } | |
350 | if (__have_o_cloexec < 0) | |
351 | __fcntl (fd, F_SETFD, FD_CLOEXEC); | |
94b7cc37 | 352 | } |
94b7cc37 | 353 | #endif |
4e2e9999 | 354 | |
129d706d UD |
355 | /* Test whether the mode string specifies the conversion. */ |
356 | cs = strstr (last_recognized + 1, ",ccs="); | |
357 | if (cs != NULL) | |
358 | { | |
359 | /* Yep. Load the appropriate conversions and set the orientation | |
360 | to wide. */ | |
361 | struct gconv_fcts fcts; | |
362 | struct _IO_codecvt *cc; | |
363 | char *endp = __strchrnul (cs + 5, ','); | |
6909d276 PP |
364 | char *ccs = malloc (endp - (cs + 5) + 3); |
365 | ||
366 | if (ccs == NULL) | |
367 | { | |
368 | int malloc_err = errno; /* Whatever malloc failed with. */ | |
369 | (void) _IO_file_close_it (fp); | |
370 | __set_errno (malloc_err); | |
371 | return NULL; | |
372 | } | |
129d706d UD |
373 | |
374 | *((char *) __mempcpy (ccs, cs + 5, endp - (cs + 5))) = '\0'; | |
375 | strip (ccs, ccs); | |
376 | ||
377 | if (__wcsmbs_named_conv (&fcts, ccs[2] == '\0' | |
378 | ? upstr (ccs, cs + 5) : ccs) != 0) | |
379 | { | |
380 | /* Something went wrong, we cannot load the conversion modules. | |
381 | This means we cannot proceed since the user explicitly asked | |
382 | for these. */ | |
d18ea0c5 | 383 | (void) _IO_file_close_it (fp); |
6909d276 | 384 | free (ccs); |
129d706d UD |
385 | __set_errno (EINVAL); |
386 | return NULL; | |
387 | } | |
388 | ||
6909d276 PP |
389 | free (ccs); |
390 | ||
129d706d UD |
391 | assert (fcts.towc_nsteps == 1); |
392 | assert (fcts.tomb_nsteps == 1); | |
393 | ||
394 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
395 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; | |
396 | ||
397 | /* Clear the state. We start all over again. */ | |
398 | memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t)); | |
399 | memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t)); | |
400 | ||
401 | cc = fp->_codecvt = &fp->_wide_data->_codecvt; | |
402 | ||
403 | /* The functions are always the same. */ | |
404 | *cc = __libio_codecvt; | |
405 | ||
406 | cc->__cd_in.__cd.__nsteps = fcts.towc_nsteps; | |
407 | cc->__cd_in.__cd.__steps = fcts.towc; | |
408 | ||
409 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0; | |
410 | cc->__cd_in.__cd.__data[0].__internal_use = 1; | |
411 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
412 | cc->__cd_in.__cd.__data[0].__statep = &result->_wide_data->_IO_state; | |
413 | ||
129d706d UD |
414 | cc->__cd_out.__cd.__nsteps = fcts.tomb_nsteps; |
415 | cc->__cd_out.__cd.__steps = fcts.tomb; | |
416 | ||
417 | cc->__cd_out.__cd.__data[0].__invocation_counter = 0; | |
418 | cc->__cd_out.__cd.__data[0].__internal_use = 1; | |
ba7b4d29 FW |
419 | cc->__cd_out.__cd.__data[0].__flags |
420 | = __GCONV_IS_LAST | __GCONV_TRANSLIT; | |
129d706d UD |
421 | cc->__cd_out.__cd.__data[0].__statep = |
422 | &result->_wide_data->_IO_state; | |
423 | ||
a815c3ab | 424 | /* From now on use the wide character callback functions. */ |
e69dcccb | 425 | _IO_JUMPS_FILE_plus (fp) = fp->_wide_data->_wide_vtable; |
a815c3ab | 426 | |
129d706d UD |
427 | /* Set the mode now. */ |
428 | result->_mode = 1; | |
129d706d | 429 | } |
4e2e9999 | 430 | } |
4e2e9999 UD |
431 | |
432 | return result; | |
96aa2d94 | 433 | } |
d18ea0c5 | 434 | libc_hidden_ver (_IO_new_file_fopen, _IO_file_fopen) |
96aa2d94 | 435 | |
40a55d20 | 436 | _IO_FILE * |
24b97882 | 437 | _IO_new_file_attach (_IO_FILE *fp, int fd) |
96aa2d94 | 438 | { |
40a55d20 | 439 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
440 | return NULL; |
441 | fp->_fileno = fd; | |
442 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
443 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
f65fd747 UD |
444 | /* Get the current position of the file. */ |
445 | /* We have to do that since that may be junk. */ | |
bd355af0 | 446 | fp->_offset = _IO_pos_BAD; |
c4a710b6 | 447 | int save_errno = errno; |
dfd2257a | 448 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) |
f65fd747 UD |
449 | == _IO_pos_BAD && errno != ESPIPE) |
450 | return NULL; | |
11ed3eae | 451 | __set_errno (save_errno); |
96aa2d94 RM |
452 | return fp; |
453 | } | |
d18ea0c5 | 454 | libc_hidden_ver (_IO_new_file_attach, _IO_file_attach) |
96aa2d94 | 455 | |
40a55d20 | 456 | _IO_FILE * |
24b97882 | 457 | _IO_new_file_setbuf (_IO_FILE *fp, char *p, _IO_ssize_t len) |
96aa2d94 | 458 | { |
d64b6ad0 UD |
459 | if (_IO_default_setbuf (fp, p, len) == NULL) |
460 | return NULL; | |
96aa2d94 | 461 | |
d64b6ad0 UD |
462 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end |
463 | = fp->_IO_buf_base; | |
464 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 | 465 | |
d64b6ad0 | 466 | return fp; |
96aa2d94 | 467 | } |
d18ea0c5 | 468 | libc_hidden_ver (_IO_new_file_setbuf, _IO_file_setbuf) |
96aa2d94 | 469 | |
bff334e0 UD |
470 | |
471 | _IO_FILE * | |
24b97882 | 472 | _IO_file_setbuf_mmap (_IO_FILE *fp, char *p, _IO_ssize_t len) |
bff334e0 UD |
473 | { |
474 | _IO_FILE *result; | |
475 | ||
476 | /* Change the function table. */ | |
e69dcccb | 477 | _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps; |
bff334e0 UD |
478 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
479 | ||
480 | /* And perform the normal operation. */ | |
481 | result = _IO_new_file_setbuf (fp, p, len); | |
482 | ||
483 | /* If the call failed, restore to using mmap. */ | |
484 | if (result == NULL) | |
485 | { | |
e69dcccb | 486 | _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps_mmap; |
bff334e0 UD |
487 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; |
488 | } | |
489 | ||
490 | return result; | |
491 | } | |
492 | ||
0fca3153 | 493 | static _IO_size_t new_do_write (_IO_FILE *, const char *, _IO_size_t); |
0720f75c | 494 | |
96aa2d94 | 495 | /* Write TO_DO bytes from DATA to FP. |
68dbb3a6 | 496 | Then mark FP as having empty buffers. */ |
96aa2d94 RM |
497 | |
498 | int | |
24b97882 | 499 | _IO_new_do_write (_IO_FILE *fp, const char *data, _IO_size_t to_do) |
0720f75c | 500 | { |
6dd67bd5 UD |
501 | return (to_do == 0 |
502 | || (_IO_size_t) new_do_write (fp, data, to_do) == to_do) ? 0 : EOF; | |
0720f75c | 503 | } |
d18ea0c5 | 504 | libc_hidden_ver (_IO_new_do_write, _IO_do_write) |
0720f75c UD |
505 | |
506 | static | |
ccf3ea43 | 507 | _IO_size_t |
24b97882 | 508 | new_do_write (_IO_FILE *fp, const char *data, _IO_size_t to_do) |
96aa2d94 RM |
509 | { |
510 | _IO_size_t count; | |
96aa2d94 RM |
511 | if (fp->_flags & _IO_IS_APPENDING) |
512 | /* On a system without a proper O_APPEND implementation, | |
513 | you would need to sys_seek(0, SEEK_END) here, but is | |
ded5b9b7 | 514 | not needed nor desirable for Unix- or Posix-like systems. |
96aa2d94 RM |
515 | Instead, just indicate that offset (before and after) is |
516 | unpredictable. */ | |
bd355af0 | 517 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 518 | else if (fp->_IO_read_end != fp->_IO_write_base) |
23396375 | 519 | { |
d64b6ad0 | 520 | _IO_off64_t new_pos |
40a55d20 | 521 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
96aa2d94 | 522 | if (new_pos == _IO_pos_BAD) |
0720f75c | 523 | return 0; |
bd355af0 | 524 | fp->_offset = new_pos; |
96aa2d94 RM |
525 | } |
526 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 527 | if (fp->_cur_column && count) |
d18ea0c5 | 528 | fp->_cur_column = _IO_adjust_column (fp->_cur_column - 1, data, count) + 1; |
40a55d20 | 529 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
96aa2d94 | 530 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; |
076bfcf6 | 531 | fp->_IO_write_end = (fp->_mode <= 0 |
2e425022 | 532 | && (fp->_flags & (_IO_LINE_BUF | _IO_UNBUFFERED)) |
40a55d20 | 533 | ? fp->_IO_buf_base : fp->_IO_buf_end); |
0720f75c | 534 | return count; |
96aa2d94 RM |
535 | } |
536 | ||
537 | int | |
24b97882 | 538 | _IO_new_file_underflow (_IO_FILE *fp) |
96aa2d94 RM |
539 | { |
540 | _IO_ssize_t count; | |
541 | #if 0 | |
542 | /* SysV does not make this test; take it out for compatibility */ | |
543 | if (fp->_flags & _IO_EOF_SEEN) | |
544 | return (EOF); | |
545 | #endif | |
546 | ||
547 | if (fp->_flags & _IO_NO_READS) | |
feb3c934 | 548 | { |
58034572 | 549 | fp->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
550 | __set_errno (EBADF); |
551 | return EOF; | |
552 | } | |
96aa2d94 | 553 | if (fp->_IO_read_ptr < fp->_IO_read_end) |
40a55d20 | 554 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 RM |
555 | |
556 | if (fp->_IO_buf_base == NULL) | |
00bc5db0 UD |
557 | { |
558 | /* Maybe we already have a push back pointer. */ | |
559 | if (fp->_IO_save_base != NULL) | |
560 | { | |
561 | free (fp->_IO_save_base); | |
562 | fp->_flags &= ~_IO_IN_BACKUP; | |
563 | } | |
d18ea0c5 | 564 | _IO_doallocbuf (fp); |
00bc5db0 | 565 | } |
96aa2d94 RM |
566 | |
567 | /* Flush all line buffered files before reading. */ | |
568 | /* FIXME This can/should be moved to genops ?? */ | |
569 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
3d759cb8 UD |
570 | { |
571 | #if 0 | |
d18ea0c5 | 572 | _IO_flush_all_linebuffered (); |
3d759cb8 UD |
573 | #else |
574 | /* We used to flush all line-buffered stream. This really isn't | |
575 | required by any standard. My recollection is that | |
576 | traditional Unix systems did this for stdout. stderr better | |
577 | not be line buffered. So we do just that here | |
578 | explicitly. --drepper */ | |
0261d33f | 579 | _IO_acquire_lock (_IO_stdout); |
3d759cb8 UD |
580 | |
581 | if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF)) | |
582 | == (_IO_LINKED | _IO_LINE_BUF)) | |
583 | _IO_OVERFLOW (_IO_stdout, EOF); | |
584 | ||
0261d33f | 585 | _IO_release_lock (_IO_stdout); |
3d759cb8 UD |
586 | #endif |
587 | } | |
96aa2d94 | 588 | |
d18ea0c5 | 589 | _IO_switch_to_get_mode (fp); |
96aa2d94 | 590 | |
2d7da676 UD |
591 | /* This is very tricky. We have to adjust those |
592 | pointers before we call _IO_SYSREAD () since | |
593 | we may longjump () out while waiting for | |
594 | input. Those pointers may be screwed up. H.J. */ | |
595 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
596 | fp->_IO_read_end = fp->_IO_buf_base; | |
597 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
598 | = fp->_IO_buf_base; | |
599 | ||
96aa2d94 RM |
600 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, |
601 | fp->_IO_buf_end - fp->_IO_buf_base); | |
602 | if (count <= 0) | |
603 | { | |
604 | if (count == 0) | |
605 | fp->_flags |= _IO_EOF_SEEN; | |
606 | else | |
607 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
608 | } | |
2d7da676 | 609 | fp->_IO_read_end += count; |
96aa2d94 | 610 | if (count == 0) |
fe8b4d98 SP |
611 | { |
612 | /* If a stream is read to EOF, the calling application may switch active | |
613 | handles. As a result, our offset cache would no longer be valid, so | |
614 | unset it. */ | |
615 | fp->_offset = _IO_pos_BAD; | |
616 | return EOF; | |
617 | } | |
bd355af0 UD |
618 | if (fp->_offset != _IO_pos_BAD) |
619 | _IO_pos_adjust (fp->_offset, count); | |
40a55d20 | 620 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 | 621 | } |
d18ea0c5 | 622 | libc_hidden_ver (_IO_new_file_underflow, _IO_file_underflow) |
96aa2d94 | 623 | |
acbee5f6 RM |
624 | /* Guts of underflow callback if we mmap the file. This stats the file and |
625 | updates the stream state to match. In the normal case we return zero. | |
626 | If the file is no longer eligible for mmap, its jump tables are reset to | |
627 | the vanilla ones and we return nonzero. */ | |
628 | static int | |
629 | mmap_remap_check (_IO_FILE *fp) | |
0469311e | 630 | { |
c8450f70 | 631 | struct stat64 st; |
acbee5f6 RM |
632 | |
633 | if (_IO_SYSSTAT (fp, &st) == 0 | |
634 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
635 | /* Limit the file size to 1MB for 32-bit machines. */ | |
636 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)) | |
0469311e | 637 | { |
acbee5f6 RM |
638 | const size_t pagesize = __getpagesize (); |
639 | # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1)) | |
640 | if (ROUNDED (st.st_size) < ROUNDED (fp->_IO_buf_end | |
641 | - fp->_IO_buf_base)) | |
642 | { | |
643 | /* We can trim off some pages past the end of the file. */ | |
644 | (void) __munmap (fp->_IO_buf_base + ROUNDED (st.st_size), | |
645 | ROUNDED (fp->_IO_buf_end - fp->_IO_buf_base) | |
646 | - ROUNDED (st.st_size)); | |
647 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
648 | } | |
649 | else if (ROUNDED (st.st_size) > ROUNDED (fp->_IO_buf_end | |
650 | - fp->_IO_buf_base)) | |
651 | { | |
652 | /* The file added some pages. We need to remap it. */ | |
653 | void *p; | |
eaae7493 | 654 | #ifdef _G_HAVE_MREMAP |
acbee5f6 RM |
655 | p = __mremap (fp->_IO_buf_base, ROUNDED (fp->_IO_buf_end |
656 | - fp->_IO_buf_base), | |
657 | ROUNDED (st.st_size), MREMAP_MAYMOVE); | |
658 | if (p == MAP_FAILED) | |
659 | { | |
660 | (void) __munmap (fp->_IO_buf_base, | |
661 | fp->_IO_buf_end - fp->_IO_buf_base); | |
662 | goto punt; | |
663 | } | |
664 | #else | |
665 | (void) __munmap (fp->_IO_buf_base, | |
666 | fp->_IO_buf_end - fp->_IO_buf_base); | |
ced52c71 JM |
667 | p = __mmap64 (NULL, st.st_size, PROT_READ, MAP_SHARED, |
668 | fp->_fileno, 0); | |
acbee5f6 RM |
669 | if (p == MAP_FAILED) |
670 | goto punt; | |
671 | #endif | |
672 | fp->_IO_buf_base = p; | |
673 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
674 | } | |
675 | else | |
676 | { | |
677 | /* The number of pages didn't change. */ | |
678 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
679 | } | |
680 | # undef ROUNDED | |
681 | ||
682 | fp->_offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
fc77d66a RM |
683 | _IO_setg (fp, fp->_IO_buf_base, |
684 | fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base | |
685 | ? fp->_IO_buf_base + fp->_offset : fp->_IO_buf_end, | |
acbee5f6 | 686 | fp->_IO_buf_end); |
c4292489 | 687 | |
fc77d66a RM |
688 | /* If we are already positioned at or past the end of the file, don't |
689 | change the current offset. If not, seek past what we have mapped, | |
690 | mimicking the position left by a normal underflow reading into its | |
691 | buffer until EOF. */ | |
692 | ||
693 | if (fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base) | |
694 | { | |
ced52c71 JM |
695 | if (__lseek64 (fp->_fileno, fp->_IO_buf_end - fp->_IO_buf_base, |
696 | SEEK_SET) | |
fc77d66a RM |
697 | != fp->_IO_buf_end - fp->_IO_buf_base) |
698 | fp->_flags |= _IO_ERR_SEEN; | |
699 | else | |
700 | fp->_offset = fp->_IO_buf_end - fp->_IO_buf_base; | |
0469311e | 701 | } |
acbee5f6 RM |
702 | |
703 | return 0; | |
704 | } | |
705 | else | |
706 | { | |
707 | /* Life is no longer good for mmap. Punt it. */ | |
708 | (void) __munmap (fp->_IO_buf_base, | |
709 | fp->_IO_buf_end - fp->_IO_buf_base); | |
710 | punt: | |
711 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; | |
712 | _IO_setg (fp, NULL, NULL, NULL); | |
713 | if (fp->_mode <= 0) | |
e69dcccb | 714 | _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps; |
acbee5f6 | 715 | else |
e69dcccb | 716 | _IO_JUMPS_FILE_plus (fp) = &_IO_wfile_jumps; |
acbee5f6 RM |
717 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
718 | ||
719 | return 1; | |
0469311e | 720 | } |
acbee5f6 RM |
721 | } |
722 | ||
723 | /* Special callback replacing the underflow callbacks if we mmap the file. */ | |
724 | int | |
725 | _IO_file_underflow_mmap (_IO_FILE *fp) | |
726 | { | |
727 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
728 | return *(unsigned char *) fp->_IO_read_ptr; | |
729 | ||
a1ffb40e | 730 | if (__glibc_unlikely (mmap_remap_check (fp))) |
acbee5f6 RM |
731 | /* We punted to the regular file functions. */ |
732 | return _IO_UNDERFLOW (fp); | |
733 | ||
734 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
735 | return *(unsigned char *) fp->_IO_read_ptr; | |
0469311e UD |
736 | |
737 | fp->_flags |= _IO_EOF_SEEN; | |
738 | return EOF; | |
739 | } | |
740 | ||
acbee5f6 RM |
741 | static void |
742 | decide_maybe_mmap (_IO_FILE *fp) | |
743 | { | |
744 | /* We use the file in read-only mode. This could mean we can | |
745 | mmap the file and use it without any copying. But not all | |
746 | file descriptors are for mmap-able objects and on 32-bit | |
747 | machines we don't want to map files which are too large since | |
748 | this would require too much virtual memory. */ | |
c8450f70 | 749 | struct stat64 st; |
acbee5f6 RM |
750 | |
751 | if (_IO_SYSSTAT (fp, &st) == 0 | |
752 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
753 | /* Limit the file size to 1MB for 32-bit machines. */ | |
754 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024) | |
755 | /* Sanity check. */ | |
756 | && (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size)) | |
757 | { | |
758 | /* Try to map the file. */ | |
759 | void *p; | |
760 | ||
ced52c71 | 761 | p = __mmap64 (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); |
acbee5f6 RM |
762 | if (p != MAP_FAILED) |
763 | { | |
764 | /* OK, we managed to map the file. Set the buffer up and use a | |
765 | special jump table with simplified underflow functions which | |
766 | never tries to read anything from the file. */ | |
767 | ||
ced52c71 | 768 | if (__lseek64 (fp->_fileno, st.st_size, SEEK_SET) != st.st_size) |
acbee5f6 RM |
769 | { |
770 | (void) __munmap (p, st.st_size); | |
771 | fp->_offset = _IO_pos_BAD; | |
772 | } | |
773 | else | |
774 | { | |
d18ea0c5 | 775 | _IO_setb (fp, p, (char *) p + st.st_size, 0); |
acbee5f6 RM |
776 | |
777 | if (fp->_offset == _IO_pos_BAD) | |
778 | fp->_offset = 0; | |
779 | ||
780 | _IO_setg (fp, p, p + fp->_offset, p + st.st_size); | |
781 | fp->_offset = st.st_size; | |
782 | ||
783 | if (fp->_mode <= 0) | |
e69dcccb | 784 | _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps_mmap; |
acbee5f6 | 785 | else |
e69dcccb | 786 | _IO_JUMPS_FILE_plus (fp) = &_IO_wfile_jumps_mmap; |
acbee5f6 RM |
787 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; |
788 | ||
789 | return; | |
790 | } | |
791 | } | |
792 | } | |
793 | ||
794 | /* We couldn't use mmap, so revert to the vanilla file operations. */ | |
795 | ||
796 | if (fp->_mode <= 0) | |
e69dcccb | 797 | _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps; |
acbee5f6 | 798 | else |
e69dcccb | 799 | _IO_JUMPS_FILE_plus (fp) = &_IO_wfile_jumps; |
acbee5f6 RM |
800 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
801 | } | |
802 | ||
803 | int | |
804 | _IO_file_underflow_maybe_mmap (_IO_FILE *fp) | |
805 | { | |
806 | /* This is the first read attempt. Choose mmap or vanilla operations | |
807 | and then punt to the chosen underflow routine. */ | |
808 | decide_maybe_mmap (fp); | |
809 | return _IO_UNDERFLOW (fp); | |
810 | } | |
811 | ||
812 | ||
96aa2d94 | 813 | int |
24b97882 | 814 | _IO_new_file_overflow (_IO_FILE *f, int ch) |
96aa2d94 RM |
815 | { |
816 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
feb3c934 | 817 | { |
c131718c | 818 | f->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
819 | __set_errno (EBADF); |
820 | return EOF; | |
821 | } | |
96aa2d94 | 822 | /* If currently reading or no buffer allocated. */ |
34c5e4a1 | 823 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0 || f->_IO_write_base == NULL) |
96aa2d94 RM |
824 | { |
825 | /* Allocate a buffer if needed. */ | |
34c5e4a1 | 826 | if (f->_IO_write_base == NULL) |
96aa2d94 | 827 | { |
d18ea0c5 | 828 | _IO_doallocbuf (f); |
96aa2d94 RM |
829 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
830 | } | |
c6645251 UD |
831 | /* Otherwise must be currently reading. |
832 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
833 | logically slide the buffer forwards one block (by setting the | |
834 | read pointers to all point at the beginning of the block). This | |
835 | makes room for subsequent output. | |
836 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
837 | alone, so it can continue to correspond to the external position). */ | |
a1ffb40e | 838 | if (__glibc_unlikely (_IO_in_backup (f))) |
483b8cc6 UD |
839 | { |
840 | size_t nbackup = f->_IO_read_end - f->_IO_read_ptr; | |
d18ea0c5 | 841 | _IO_free_backup_area (f); |
483b8cc6 UD |
842 | f->_IO_read_base -= MIN (nbackup, |
843 | f->_IO_read_base - f->_IO_buf_base); | |
844 | f->_IO_read_ptr = f->_IO_read_base; | |
845 | } | |
eb35b097 UD |
846 | |
847 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
848 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
849 | f->_IO_write_ptr = f->_IO_read_ptr; | |
850 | f->_IO_write_base = f->_IO_write_ptr; | |
851 | f->_IO_write_end = f->_IO_buf_end; | |
852 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
96aa2d94 | 853 | |
96aa2d94 | 854 | f->_flags |= _IO_CURRENTLY_PUTTING; |
2e425022 | 855 | if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF | _IO_UNBUFFERED)) |
bfcd44c3 | 856 | f->_IO_write_end = f->_IO_write_ptr; |
96aa2d94 RM |
857 | } |
858 | if (ch == EOF) | |
d18ea0c5 AS |
859 | return _IO_do_write (f, f->_IO_write_base, |
860 | f->_IO_write_ptr - f->_IO_write_base); | |
96aa2d94 | 861 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
40a55d20 | 862 | if (_IO_do_flush (f) == EOF) |
96aa2d94 RM |
863 | return EOF; |
864 | *f->_IO_write_ptr++ = ch; | |
865 | if ((f->_flags & _IO_UNBUFFERED) | |
866 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
d18ea0c5 AS |
867 | if (_IO_do_write (f, f->_IO_write_base, |
868 | f->_IO_write_ptr - f->_IO_write_base) == EOF) | |
96aa2d94 | 869 | return EOF; |
40a55d20 | 870 | return (unsigned char) ch; |
96aa2d94 | 871 | } |
d18ea0c5 | 872 | libc_hidden_ver (_IO_new_file_overflow, _IO_file_overflow) |
96aa2d94 RM |
873 | |
874 | int | |
24b97882 | 875 | _IO_new_file_sync (_IO_FILE *fp) |
96aa2d94 | 876 | { |
a2bde807 | 877 | _IO_ssize_t delta; |
61eb22d3 UD |
878 | int retval = 0; |
879 | ||
96aa2d94 RM |
880 | /* char* ptr = cur_ptr(); */ |
881 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
882 | if (_IO_do_flush(fp)) return EOF; | |
23396375 | 883 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
96aa2d94 RM |
884 | if (delta != 0) |
885 | { | |
886 | #ifdef TODO | |
40a55d20 UD |
887 | if (_IO_in_backup (fp)) |
888 | delta -= eGptr () - Gbase (); | |
96aa2d94 | 889 | #endif |
dfd2257a UD |
890 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, delta, 1); |
891 | if (new_pos != (_IO_off64_t) EOF) | |
96aa2d94 RM |
892 | fp->_IO_read_end = fp->_IO_read_ptr; |
893 | #ifdef ESPIPE | |
894 | else if (errno == ESPIPE) | |
895 | ; /* Ignore error from unseekable devices. */ | |
896 | #endif | |
897 | else | |
61eb22d3 | 898 | retval = EOF; |
96aa2d94 | 899 | } |
61eb22d3 | 900 | if (retval != EOF) |
bd355af0 | 901 | fp->_offset = _IO_pos_BAD; |
96aa2d94 RM |
902 | /* FIXME: Cleanup - can this be shared? */ |
903 | /* setg(base(), ptr, ptr); */ | |
61eb22d3 | 904 | return retval; |
96aa2d94 | 905 | } |
d18ea0c5 | 906 | libc_hidden_ver (_IO_new_file_sync, _IO_file_sync) |
96aa2d94 | 907 | |
acbee5f6 RM |
908 | static int |
909 | _IO_file_sync_mmap (_IO_FILE *fp) | |
910 | { | |
911 | if (fp->_IO_read_ptr != fp->_IO_read_end) | |
912 | { | |
913 | #ifdef TODO | |
914 | if (_IO_in_backup (fp)) | |
915 | delta -= eGptr () - Gbase (); | |
916 | #endif | |
ced52c71 JM |
917 | if (__lseek64 (fp->_fileno, fp->_IO_read_ptr - fp->_IO_buf_base, |
918 | SEEK_SET) | |
acbee5f6 RM |
919 | != fp->_IO_read_ptr - fp->_IO_buf_base) |
920 | { | |
921 | fp->_flags |= _IO_ERR_SEEN; | |
922 | return EOF; | |
923 | } | |
924 | } | |
925 | fp->_offset = fp->_IO_read_ptr - fp->_IO_buf_base; | |
926 | fp->_IO_read_end = fp->_IO_read_ptr = fp->_IO_read_base; | |
927 | return 0; | |
928 | } | |
929 | ||
ea33158c SP |
930 | /* ftell{,o} implementation. The only time we modify the state of the stream |
931 | is when we have unflushed writes. In that case we seek to the end and | |
932 | record that offset in the stream object. */ | |
000232b9 SP |
933 | static _IO_off64_t |
934 | do_ftell (_IO_FILE *fp) | |
935 | { | |
ea33158c | 936 | _IO_off64_t result, offset = 0; |
000232b9 SP |
937 | |
938 | /* No point looking at unflushed data if we haven't allocated buffers | |
939 | yet. */ | |
940 | if (fp->_IO_buf_base != NULL) | |
941 | { | |
be349d70 | 942 | bool unflushed_writes = fp->_IO_write_ptr > fp->_IO_write_base; |
000232b9 | 943 | |
ea33158c SP |
944 | bool append_mode = (fp->_flags & _IO_IS_APPENDING) == _IO_IS_APPENDING; |
945 | ||
946 | /* When we have unflushed writes in append mode, seek to the end of the | |
947 | file and record that offset. This is the only time we change the file | |
948 | stream state and it is safe since the file handle is active. */ | |
be349d70 | 949 | if (unflushed_writes && append_mode) |
ea33158c SP |
950 | { |
951 | result = _IO_SYSSEEK (fp, 0, _IO_seek_end); | |
952 | if (result == _IO_pos_BAD) | |
953 | return EOF; | |
954 | else | |
955 | fp->_offset = result; | |
956 | } | |
957 | ||
000232b9 | 958 | /* Adjust for unflushed data. */ |
be349d70 | 959 | if (!unflushed_writes) |
ea33158c | 960 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; |
2482ae43 SP |
961 | /* We don't trust _IO_read_end to represent the current file offset when |
962 | writing in append mode because the value would have to be shifted to | |
963 | the end of the file during a flush. Use the write base instead, along | |
964 | with the new offset we got above when we did a seek to the end of the | |
965 | file. */ | |
966 | else if (append_mode) | |
967 | offset += fp->_IO_write_ptr - fp->_IO_write_base; | |
968 | /* For all other modes, _IO_read_end represents the file offset. */ | |
000232b9 | 969 | else |
ea33158c | 970 | offset += fp->_IO_write_ptr - fp->_IO_read_end; |
000232b9 SP |
971 | } |
972 | ||
ea33158c SP |
973 | if (fp->_offset != _IO_pos_BAD) |
974 | result = fp->_offset; | |
fa3cd248 | 975 | else |
ea33158c | 976 | result = _IO_SYSSEEK (fp, 0, _IO_seek_cur); |
fa3cd248 SP |
977 | |
978 | if (result == EOF) | |
979 | return result; | |
980 | ||
ea33158c SP |
981 | result += offset; |
982 | ||
000232b9 SP |
983 | if (result < 0) |
984 | { | |
985 | __set_errno (EINVAL); | |
986 | return EOF; | |
987 | } | |
988 | ||
989 | return result; | |
990 | } | |
991 | ||
d64b6ad0 | 992 | _IO_off64_t |
24b97882 | 993 | _IO_new_file_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode) |
96aa2d94 | 994 | { |
d64b6ad0 | 995 | _IO_off64_t result; |
dfd2257a | 996 | _IO_off64_t delta, new_offset; |
96aa2d94 | 997 | long count; |
000232b9 SP |
998 | |
999 | /* Short-circuit into a separate function. We don't want to mix any | |
1000 | functionality and we don't want to touch anything inside the FILE | |
1001 | object. */ | |
1002 | if (mode == 0) | |
1003 | return do_ftell (fp); | |
1004 | ||
feb3c934 UD |
1005 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file |
1006 | offset of the underlying file must be exact. */ | |
1007 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
1008 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
96aa2d94 | 1009 | |
adb26fae SP |
1010 | bool was_writing = (fp->_IO_write_ptr > fp->_IO_write_base |
1011 | || _IO_in_put_mode (fp)); | |
1012 | ||
96aa2d94 RM |
1013 | /* Flush unwritten characters. |
1014 | (This may do an unneeded write if we seek within the buffer. | |
1015 | But to be able to switch to reading, we would need to set | |
2b4f00d1 | 1016 | egptr to pptr. That can't be done in the current design, |
96aa2d94 RM |
1017 | which assumes file_ptr() is eGptr. Anyway, since we probably |
1018 | end up flushing when we close(), it doesn't make much difference.) | |
2b4f00d1 | 1019 | FIXME: simulate mem-mapped files. */ |
000232b9 | 1020 | if (was_writing && _IO_switch_to_get_mode (fp)) |
adb26fae | 1021 | return EOF; |
96aa2d94 RM |
1022 | |
1023 | if (fp->_IO_buf_base == NULL) | |
1024 | { | |
00bc5db0 UD |
1025 | /* It could be that we already have a pushback buffer. */ |
1026 | if (fp->_IO_read_base != NULL) | |
1027 | { | |
1028 | free (fp->_IO_read_base); | |
1029 | fp->_flags &= ~_IO_IN_BACKUP; | |
1030 | } | |
d18ea0c5 | 1031 | _IO_doallocbuf (fp); |
40a55d20 UD |
1032 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
1033 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 RM |
1034 | } |
1035 | ||
1036 | switch (dir) | |
1037 | { | |
1038 | case _IO_seek_cur: | |
1039 | /* Adjust for read-ahead (bytes is buffer). */ | |
000232b9 | 1040 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; |
adb26fae | 1041 | |
bd355af0 | 1042 | if (fp->_offset == _IO_pos_BAD) |
000232b9 | 1043 | goto dumb; |
96aa2d94 | 1044 | /* Make offset absolute, assuming current pointer is file_ptr(). */ |
d64b6ad0 | 1045 | offset += fp->_offset; |
405550bf UD |
1046 | if (offset < 0) |
1047 | { | |
1048 | __set_errno (EINVAL); | |
1049 | return EOF; | |
1050 | } | |
96aa2d94 RM |
1051 | |
1052 | dir = _IO_seek_set; | |
1053 | break; | |
1054 | case _IO_seek_set: | |
1055 | break; | |
1056 | case _IO_seek_end: | |
1057 | { | |
c8450f70 | 1058 | struct stat64 st; |
40a55d20 | 1059 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
96aa2d94 RM |
1060 | { |
1061 | offset += st.st_size; | |
1062 | dir = _IO_seek_set; | |
1063 | } | |
1064 | else | |
1065 | goto dumb; | |
1066 | } | |
1067 | } | |
1068 | /* At this point, dir==_IO_seek_set. */ | |
1069 | ||
1070 | /* If destination is within current buffer, optimize: */ | |
bd355af0 | 1071 | if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL |
96aa2d94 RM |
1072 | && !_IO_in_backup (fp)) |
1073 | { | |
c03c66dd UD |
1074 | _IO_off64_t start_offset = (fp->_offset |
1075 | - (fp->_IO_read_end - fp->_IO_buf_base)); | |
1076 | if (offset >= start_offset && offset < fp->_offset) | |
96aa2d94 | 1077 | { |
c03c66dd UD |
1078 | _IO_setg (fp, fp->_IO_buf_base, |
1079 | fp->_IO_buf_base + (offset - start_offset), | |
1080 | fp->_IO_read_end); | |
1081 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1082 | ||
00bc5db0 | 1083 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 1084 | goto resync; |
96aa2d94 | 1085 | } |
96aa2d94 RM |
1086 | } |
1087 | ||
96aa2d94 RM |
1088 | if (fp->_flags & _IO_NO_READS) |
1089 | goto dumb; | |
1090 | ||
1091 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
1092 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
1093 | delta = offset - new_offset; | |
1094 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
1095 | { | |
1096 | new_offset = offset; | |
1097 | delta = 0; | |
1098 | } | |
1099 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
1100 | if (result < 0) | |
1101 | return EOF; | |
1102 | if (delta == 0) | |
1103 | count = 0; | |
1104 | else | |
1105 | { | |
1106 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
feb3c934 UD |
1107 | (must_be_exact |
1108 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
96aa2d94 RM |
1109 | if (count < delta) |
1110 | { | |
1111 | /* We weren't allowed to read, but try to seek the remainder. */ | |
1112 | offset = count == EOF ? delta : delta-count; | |
1113 | dir = _IO_seek_cur; | |
1114 | goto dumb; | |
1115 | } | |
1116 | } | |
40a55d20 UD |
1117 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, |
1118 | fp->_IO_buf_base + count); | |
1119 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
bd355af0 | 1120 | fp->_offset = result + count; |
40a55d20 | 1121 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
96aa2d94 RM |
1122 | return offset; |
1123 | dumb: | |
1124 | ||
d18ea0c5 | 1125 | _IO_unsave_markers (fp); |
96aa2d94 RM |
1126 | result = _IO_SYSSEEK (fp, offset, dir); |
1127 | if (result != EOF) | |
d762684b UD |
1128 | { |
1129 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1130 | fp->_offset = result; | |
1131 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1132 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1133 | } | |
96aa2d94 | 1134 | return result; |
4a582094 UD |
1135 | |
1136 | resync: | |
1137 | /* We need to do it since it is possible that the file offset in | |
1138 | the kernel may be changed behind our back. It may happen when | |
1139 | we fopen a file and then do a fork. One process may access the | |
ded5b9b7 | 1140 | file and the kernel file offset will be changed. */ |
4a582094 UD |
1141 | if (fp->_offset >= 0) |
1142 | _IO_SYSSEEK (fp, fp->_offset, 0); | |
1143 | ||
1144 | return offset; | |
96aa2d94 | 1145 | } |
d18ea0c5 | 1146 | libc_hidden_ver (_IO_new_file_seekoff, _IO_file_seekoff) |
96aa2d94 | 1147 | |
284749da | 1148 | _IO_off64_t |
24b97882 | 1149 | _IO_file_seekoff_mmap (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode) |
284749da UD |
1150 | { |
1151 | _IO_off64_t result; | |
1152 | ||
7e93f915 RM |
1153 | /* If we are only interested in the current position, calculate it and |
1154 | return right now. This calculation does the right thing when we are | |
1155 | using a pushback buffer, but in the usual case has the same value as | |
1156 | (fp->_IO_read_ptr - fp->_IO_buf_base). */ | |
284749da | 1157 | if (mode == 0) |
78ce5a3b | 1158 | return fp->_offset - (fp->_IO_read_end - fp->_IO_read_ptr); |
284749da UD |
1159 | |
1160 | switch (dir) | |
1161 | { | |
1162 | case _IO_seek_cur: | |
1163 | /* Adjust for read-ahead (bytes is buffer). */ | |
1164 | offset += fp->_IO_read_ptr - fp->_IO_read_base; | |
1165 | break; | |
1166 | case _IO_seek_set: | |
1167 | break; | |
1168 | case _IO_seek_end: | |
903b3396 | 1169 | offset += fp->_IO_buf_end - fp->_IO_buf_base; |
284749da UD |
1170 | break; |
1171 | } | |
1172 | /* At this point, dir==_IO_seek_set. */ | |
1173 | ||
1174 | if (offset < 0) | |
66bff409 UD |
1175 | { |
1176 | /* No negative offsets are valid. */ | |
1177 | __set_errno (EINVAL); | |
1178 | return EOF; | |
1179 | } | |
284749da | 1180 | |
284749da UD |
1181 | result = _IO_SYSSEEK (fp, offset, 0); |
1182 | if (result < 0) | |
1183 | return EOF; | |
1184 | ||
fc77d66a RM |
1185 | if (offset > fp->_IO_buf_end - fp->_IO_buf_base) |
1186 | /* One can fseek arbitrarily past the end of the file | |
1187 | and it is meaningless until one attempts to read. | |
1188 | Leave the buffer pointers in EOF state until underflow. */ | |
1189 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_end, fp->_IO_buf_end); | |
1190 | else | |
1191 | /* Adjust the read pointers to match the file position, | |
1192 | but so the next read attempt will call underflow. */ | |
1193 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + offset, | |
1194 | fp->_IO_buf_base + offset); | |
1195 | ||
66bff409 | 1196 | fp->_offset = result; |
284749da UD |
1197 | |
1198 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1199 | ||
1200 | return offset; | |
1201 | } | |
1202 | ||
f5bf21a7 UD |
1203 | static _IO_off64_t |
1204 | _IO_file_seekoff_maybe_mmap (_IO_FILE *fp, _IO_off64_t offset, int dir, | |
1205 | int mode) | |
acbee5f6 RM |
1206 | { |
1207 | /* We only get here when we haven't tried to read anything yet. | |
1208 | So there is nothing more useful for us to do here than just | |
1209 | the underlying lseek call. */ | |
1210 | ||
1211 | _IO_off64_t result = _IO_SYSSEEK (fp, offset, dir); | |
1212 | if (result < 0) | |
1213 | return EOF; | |
1214 | ||
1215 | fp->_offset = result; | |
1216 | return result; | |
1217 | } | |
1218 | ||
96aa2d94 | 1219 | _IO_ssize_t |
24b97882 | 1220 | _IO_file_read (_IO_FILE *fp, void *buf, _IO_ssize_t size) |
96aa2d94 | 1221 | { |
e3c54d80 | 1222 | return (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0) |
ee8449f7 UD |
1223 | ? read_not_cancel (fp->_fileno, buf, size) |
1224 | : read (fp->_fileno, buf, size)); | |
96aa2d94 | 1225 | } |
d18ea0c5 | 1226 | libc_hidden_def (_IO_file_read) |
96aa2d94 | 1227 | |
d64b6ad0 | 1228 | _IO_off64_t |
24b97882 | 1229 | _IO_file_seek (_IO_FILE *fp, _IO_off64_t offset, int dir) |
96aa2d94 | 1230 | { |
ced52c71 | 1231 | return __lseek64 (fp->_fileno, offset, dir); |
96aa2d94 | 1232 | } |
d18ea0c5 | 1233 | libc_hidden_def (_IO_file_seek) |
96aa2d94 RM |
1234 | |
1235 | int | |
24b97882 | 1236 | _IO_file_stat (_IO_FILE *fp, void *st) |
96aa2d94 | 1237 | { |
ced52c71 | 1238 | return __fxstat64 (_STAT_VER, fp->_fileno, (struct stat64 *) st); |
96aa2d94 | 1239 | } |
d18ea0c5 | 1240 | libc_hidden_def (_IO_file_stat) |
96aa2d94 | 1241 | |
0469311e | 1242 | int |
24b97882 | 1243 | _IO_file_close_mmap (_IO_FILE *fp) |
0469311e | 1244 | { |
acbee5f6 RM |
1245 | /* In addition to closing the file descriptor we have to unmap the file. */ |
1246 | (void) __munmap (fp->_IO_buf_base, fp->_IO_buf_end - fp->_IO_buf_base); | |
0469311e | 1247 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; |
73299943 UD |
1248 | /* Cancelling close should be avoided if possible since it leaves an |
1249 | unrecoverable state behind. */ | |
1250 | return close_not_cancel (fp->_fileno); | |
0469311e UD |
1251 | } |
1252 | ||
96aa2d94 | 1253 | int |
24b97882 | 1254 | _IO_file_close (_IO_FILE *fp) |
96aa2d94 | 1255 | { |
73299943 UD |
1256 | /* Cancelling close should be avoided if possible since it leaves an |
1257 | unrecoverable state behind. */ | |
1258 | return close_not_cancel (fp->_fileno); | |
96aa2d94 | 1259 | } |
d18ea0c5 | 1260 | libc_hidden_def (_IO_file_close) |
96aa2d94 RM |
1261 | |
1262 | _IO_ssize_t | |
24b97882 | 1263 | _IO_new_file_write (_IO_FILE *f, const void *data, _IO_ssize_t n) |
96aa2d94 RM |
1264 | { |
1265 | _IO_ssize_t to_do = n; | |
1266 | while (to_do > 0) | |
1267 | { | |
3d110c7c EB |
1268 | _IO_ssize_t count = (__builtin_expect (f->_flags2 |
1269 | & _IO_FLAGS2_NOTCANCEL, 0) | |
1270 | ? write_not_cancel (f->_fileno, data, to_do) | |
1271 | : write (f->_fileno, data, to_do)); | |
d64b6ad0 | 1272 | if (count < 0) |
96aa2d94 | 1273 | { |
39e16978 UD |
1274 | f->_flags |= _IO_ERR_SEEN; |
1275 | break; | |
b722481a | 1276 | } |
96aa2d94 | 1277 | to_do -= count; |
40a55d20 | 1278 | data = (void *) ((char *) data + count); |
96aa2d94 RM |
1279 | } |
1280 | n -= to_do; | |
bd355af0 UD |
1281 | if (f->_offset >= 0) |
1282 | f->_offset += n; | |
3d110c7c | 1283 | return n; |
96aa2d94 RM |
1284 | } |
1285 | ||
1286 | _IO_size_t | |
24b97882 | 1287 | _IO_new_file_xsputn (_IO_FILE *f, const void *data, _IO_size_t n) |
96aa2d94 | 1288 | { |
2e09a79a | 1289 | const char *s = (const char *) data; |
96aa2d94 RM |
1290 | _IO_size_t to_do = n; |
1291 | int must_flush = 0; | |
cae6ebb2 | 1292 | _IO_size_t count = 0; |
96aa2d94 RM |
1293 | |
1294 | if (n <= 0) | |
1295 | return 0; | |
1296 | /* This is an optimized implementation. | |
1297 | If the amount to be written straddles a block boundary | |
1298 | (or the filebuf is unbuffered), use sys_write directly. */ | |
1299 | ||
1300 | /* First figure out how much space is available in the buffer. */ | |
96aa2d94 RM |
1301 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) |
1302 | { | |
1303 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
1304 | if (count >= n) | |
40a55d20 | 1305 | { |
2e09a79a | 1306 | const char *p; |
96aa2d94 RM |
1307 | for (p = s + n; p > s; ) |
1308 | { | |
40a55d20 UD |
1309 | if (*--p == '\n') |
1310 | { | |
1311 | count = p - s + 1; | |
1312 | must_flush = 1; | |
1313 | break; | |
1314 | } | |
96aa2d94 RM |
1315 | } |
1316 | } | |
1317 | } | |
cae6ebb2 UD |
1318 | else if (f->_IO_write_end > f->_IO_write_ptr) |
1319 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ | |
1320 | ||
96aa2d94 RM |
1321 | /* Then fill the buffer. */ |
1322 | if (count > 0) | |
1323 | { | |
1324 | if (count > to_do) | |
1325 | count = to_do; | |
86187531 | 1326 | #ifdef _LIBC |
20fde227 | 1327 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); |
86187531 | 1328 | #else |
20fde227 DM |
1329 | memcpy (f->_IO_write_ptr, s, count); |
1330 | f->_IO_write_ptr += count; | |
86187531 | 1331 | #endif |
20fde227 | 1332 | s += count; |
96aa2d94 RM |
1333 | to_do -= count; |
1334 | } | |
1335 | if (to_do + must_flush > 0) | |
40a55d20 | 1336 | { |
0720f75c | 1337 | _IO_size_t block_size, do_write; |
96aa2d94 | 1338 | /* Next flush the (full) buffer. */ |
5c8d1fc0 | 1339 | if (_IO_OVERFLOW (f, EOF) == EOF) |
3d110c7c EB |
1340 | /* If nothing else has to be written we must not signal the |
1341 | caller that everything has been written. */ | |
1342 | return to_do == 0 ? EOF : n - to_do; | |
96aa2d94 | 1343 | |
3d110c7c | 1344 | /* Try to maintain alignment: write a whole number of blocks. */ |
96aa2d94 | 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) | |
b722481a | 1349 | { |
0720f75c UD |
1350 | count = new_do_write (f, s, do_write); |
1351 | to_do -= count; | |
1352 | if (count < do_write) | |
1353 | return n - to_do; | |
b722481a | 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) |
d18ea0c5 | 1360 | to_do -= _IO_default_xsputn (f, s+do_write, to_do); |
96aa2d94 RM |
1361 | } |
1362 | return n - to_do; | |
1363 | } | |
d18ea0c5 | 1364 | libc_hidden_ver (_IO_new_file_xsputn, _IO_file_xsputn) |
96aa2d94 | 1365 | |
96aa2d94 | 1366 | _IO_size_t |
24b97882 | 1367 | _IO_file_xsgetn (_IO_FILE *fp, void *data, _IO_size_t n) |
96aa2d94 | 1368 | { |
2e09a79a JM |
1369 | _IO_size_t want, have; |
1370 | _IO_ssize_t count; | |
1371 | char *s = data; | |
8fe0fd03 UD |
1372 | |
1373 | want = n; | |
1374 | ||
310f9518 UD |
1375 | if (fp->_IO_buf_base == NULL) |
1376 | { | |
1377 | /* Maybe we already have a push back pointer. */ | |
1378 | if (fp->_IO_save_base != NULL) | |
1379 | { | |
1380 | free (fp->_IO_save_base); | |
1381 | fp->_flags &= ~_IO_IN_BACKUP; | |
1382 | } | |
d18ea0c5 | 1383 | _IO_doallocbuf (fp); |
310f9518 UD |
1384 | } |
1385 | ||
8fe0fd03 | 1386 | while (want > 0) |
96aa2d94 | 1387 | { |
8fe0fd03 UD |
1388 | have = fp->_IO_read_end - fp->_IO_read_ptr; |
1389 | if (want <= have) | |
96aa2d94 | 1390 | { |
8fe0fd03 UD |
1391 | memcpy (s, fp->_IO_read_ptr, want); |
1392 | fp->_IO_read_ptr += want; | |
1393 | want = 0; | |
1394 | } | |
1395 | else | |
1396 | { | |
1397 | if (have > 0) | |
96aa2d94 | 1398 | { |
279eb600 UD |
1399 | #ifdef _LIBC |
1400 | s = __mempcpy (s, fp->_IO_read_ptr, have); | |
1401 | #else | |
8fe0fd03 | 1402 | memcpy (s, fp->_IO_read_ptr, have); |
8fe0fd03 | 1403 | s += have; |
279eb600 UD |
1404 | #endif |
1405 | want -= have; | |
8fe0fd03 | 1406 | fp->_IO_read_ptr += have; |
96aa2d94 | 1407 | } |
8fe0fd03 UD |
1408 | |
1409 | /* Check for backup and repeat */ | |
1410 | if (_IO_in_backup (fp)) | |
96aa2d94 | 1411 | { |
8fe0fd03 UD |
1412 | _IO_switch_to_main_get_area (fp); |
1413 | continue; | |
1414 | } | |
1415 | ||
1416 | /* If we now want less than a buffer, underflow and repeat | |
1417 | the copy. Otherwise, _IO_SYSREAD directly to | |
1418 | the user buffer. */ | |
6dd67bd5 UD |
1419 | if (fp->_IO_buf_base |
1420 | && want < (size_t) (fp->_IO_buf_end - fp->_IO_buf_base)) | |
8fe0fd03 UD |
1421 | { |
1422 | if (__underflow (fp) == EOF) | |
1423 | break; | |
1424 | ||
1425 | continue; | |
1426 | } | |
1427 | ||
4bca4c17 UD |
1428 | /* These must be set before the sysread as we might longjmp out |
1429 | waiting for input. */ | |
1430 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1431 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1432 | ||
279eb600 UD |
1433 | /* Try to maintain alignment: read a whole number of blocks. */ |
1434 | count = want; | |
1435 | if (fp->_IO_buf_base) | |
1436 | { | |
1437 | _IO_size_t block_size = fp->_IO_buf_end - fp->_IO_buf_base; | |
1438 | if (block_size >= 128) | |
1439 | count -= want % block_size; | |
1440 | } | |
1441 | ||
1442 | count = _IO_SYSREAD (fp, s, count); | |
96aa2d94 | 1443 | if (count <= 0) |
8fe0fd03 UD |
1444 | { |
1445 | if (count == 0) | |
1446 | fp->_flags |= _IO_EOF_SEEN; | |
1447 | else | |
1448 | fp->_flags |= _IO_ERR_SEEN; | |
1449 | ||
1450 | break; | |
1451 | } | |
23396375 | 1452 | |
96aa2d94 | 1453 | s += count; |
8fe0fd03 | 1454 | want -= count; |
4bca4c17 UD |
1455 | if (fp->_offset != _IO_pos_BAD) |
1456 | _IO_pos_adjust (fp->_offset, count); | |
96aa2d94 | 1457 | } |
96aa2d94 | 1458 | } |
8fe0fd03 UD |
1459 | |
1460 | return n - want; | |
96aa2d94 | 1461 | } |
d18ea0c5 | 1462 | libc_hidden_def (_IO_file_xsgetn) |
96aa2d94 | 1463 | |
284749da | 1464 | static _IO_size_t |
24b97882 | 1465 | _IO_file_xsgetn_mmap (_IO_FILE *fp, void *data, _IO_size_t n) |
284749da | 1466 | { |
2e09a79a | 1467 | _IO_size_t have; |
284749da | 1468 | char *read_ptr = fp->_IO_read_ptr; |
2e09a79a | 1469 | char *s = (char *) data; |
284749da UD |
1470 | |
1471 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1472 | ||
1473 | if (have < n) | |
1474 | { | |
a1ffb40e | 1475 | if (__glibc_unlikely (_IO_in_backup (fp))) |
b39d5719 UD |
1476 | { |
1477 | #ifdef _LIBC | |
1478 | s = __mempcpy (s, read_ptr, have); | |
1479 | #else | |
1480 | memcpy (s, read_ptr, have); | |
1481 | s += have; | |
1482 | #endif | |
1483 | n -= have; | |
1484 | _IO_switch_to_main_get_area (fp); | |
1485 | read_ptr = fp->_IO_read_ptr; | |
1486 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1487 | } | |
1488 | ||
1489 | if (have < n) | |
1490 | { | |
acbee5f6 | 1491 | /* Check that we are mapping all of the file, in case it grew. */ |
a1ffb40e | 1492 | if (__glibc_unlikely (mmap_remap_check (fp))) |
acbee5f6 RM |
1493 | /* We punted mmap, so complete with the vanilla code. */ |
1494 | return s - (char *) data + _IO_XSGETN (fp, data, n); | |
1495 | ||
1496 | read_ptr = fp->_IO_read_ptr; | |
1497 | have = fp->_IO_read_end - read_ptr; | |
b39d5719 | 1498 | } |
284749da UD |
1499 | } |
1500 | ||
c4292489 UD |
1501 | if (have < n) |
1502 | fp->_flags |= _IO_EOF_SEEN; | |
1503 | ||
1504 | if (have != 0) | |
284749da UD |
1505 | { |
1506 | have = MIN (have, n); | |
b39d5719 UD |
1507 | #ifdef _LIBC |
1508 | s = __mempcpy (s, read_ptr, have); | |
1509 | #else | |
1510 | memcpy (s, read_ptr, have); | |
1511 | s += have; | |
1512 | #endif | |
284749da UD |
1513 | fp->_IO_read_ptr = read_ptr + have; |
1514 | } | |
1515 | ||
b39d5719 | 1516 | return s - (char *) data; |
284749da UD |
1517 | } |
1518 | ||
acbee5f6 | 1519 | static _IO_size_t |
24b97882 | 1520 | _IO_file_xsgetn_maybe_mmap (_IO_FILE *fp, void *data, _IO_size_t n) |
acbee5f6 RM |
1521 | { |
1522 | /* We only get here if this is the first attempt to read something. | |
1523 | Decide which operations to use and then punt to the chosen one. */ | |
1524 | ||
1525 | decide_maybe_mmap (fp); | |
1526 | return _IO_XSGETN (fp, data, n); | |
1527 | } | |
1528 | ||
94b68ee9 RM |
1529 | #ifdef _LIBC |
1530 | versioned_symbol (libc, _IO_new_do_write, _IO_do_write, GLIBC_2_1); | |
1531 | versioned_symbol (libc, _IO_new_file_attach, _IO_file_attach, GLIBC_2_1); | |
1532 | versioned_symbol (libc, _IO_new_file_close_it, _IO_file_close_it, GLIBC_2_1); | |
1533 | versioned_symbol (libc, _IO_new_file_finish, _IO_file_finish, GLIBC_2_1); | |
1534 | versioned_symbol (libc, _IO_new_file_fopen, _IO_file_fopen, GLIBC_2_1); | |
1535 | versioned_symbol (libc, _IO_new_file_init, _IO_file_init, GLIBC_2_1); | |
1536 | versioned_symbol (libc, _IO_new_file_setbuf, _IO_file_setbuf, GLIBC_2_1); | |
1537 | versioned_symbol (libc, _IO_new_file_sync, _IO_file_sync, GLIBC_2_1); | |
1538 | versioned_symbol (libc, _IO_new_file_overflow, _IO_file_overflow, GLIBC_2_1); | |
1539 | versioned_symbol (libc, _IO_new_file_seekoff, _IO_file_seekoff, GLIBC_2_1); | |
1540 | versioned_symbol (libc, _IO_new_file_underflow, _IO_file_underflow, GLIBC_2_1); | |
1541 | versioned_symbol (libc, _IO_new_file_write, _IO_file_write, GLIBC_2_1); | |
1542 | versioned_symbol (libc, _IO_new_file_xsputn, _IO_file_xsputn, GLIBC_2_1); | |
1543 | #endif | |
1544 | ||
db3476af | 1545 | const struct _IO_jump_t _IO_file_jumps libio_vtable = |
40a55d20 | 1546 | { |
96aa2d94 | 1547 | JUMP_INIT_DUMMY, |
d18ea0c5 AS |
1548 | JUMP_INIT(finish, _IO_file_finish), |
1549 | JUMP_INIT(overflow, _IO_file_overflow), | |
1550 | JUMP_INIT(underflow, _IO_file_underflow), | |
1551 | JUMP_INIT(uflow, _IO_default_uflow), | |
1552 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
1553 | JUMP_INIT(xsputn, _IO_file_xsputn), | |
1554 | JUMP_INIT(xsgetn, _IO_file_xsgetn), | |
b259e746 | 1555 | JUMP_INIT(seekoff, _IO_new_file_seekoff), |
96aa2d94 | 1556 | JUMP_INIT(seekpos, _IO_default_seekpos), |
b259e746 UD |
1557 | JUMP_INIT(setbuf, _IO_new_file_setbuf), |
1558 | JUMP_INIT(sync, _IO_new_file_sync), | |
d18ea0c5 AS |
1559 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1560 | JUMP_INIT(read, _IO_file_read), | |
b259e746 | 1561 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 AS |
1562 | JUMP_INIT(seek, _IO_file_seek), |
1563 | JUMP_INIT(close, _IO_file_close), | |
1564 | JUMP_INIT(stat, _IO_file_stat), | |
dfd2257a | 1565 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
0469311e UD |
1566 | JUMP_INIT(imbue, _IO_default_imbue) |
1567 | }; | |
15a686af | 1568 | libc_hidden_data_def (_IO_file_jumps) |
0469311e | 1569 | |
db3476af | 1570 | const struct _IO_jump_t _IO_file_jumps_mmap libio_vtable = |
0469311e UD |
1571 | { |
1572 | JUMP_INIT_DUMMY, | |
d18ea0c5 AS |
1573 | JUMP_INIT(finish, _IO_file_finish), |
1574 | JUMP_INIT(overflow, _IO_file_overflow), | |
0469311e | 1575 | JUMP_INIT(underflow, _IO_file_underflow_mmap), |
d18ea0c5 AS |
1576 | JUMP_INIT(uflow, _IO_default_uflow), |
1577 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
0469311e | 1578 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
284749da UD |
1579 | JUMP_INIT(xsgetn, _IO_file_xsgetn_mmap), |
1580 | JUMP_INIT(seekoff, _IO_file_seekoff_mmap), | |
0469311e | 1581 | JUMP_INIT(seekpos, _IO_default_seekpos), |
bff334e0 | 1582 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), |
acbee5f6 | 1583 | JUMP_INIT(sync, _IO_file_sync_mmap), |
d18ea0c5 AS |
1584 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1585 | JUMP_INIT(read, _IO_file_read), | |
0469311e | 1586 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 | 1587 | JUMP_INIT(seek, _IO_file_seek), |
0469311e | 1588 | JUMP_INIT(close, _IO_file_close_mmap), |
d18ea0c5 | 1589 | JUMP_INIT(stat, _IO_file_stat), |
0469311e | 1590 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
acbee5f6 RM |
1591 | JUMP_INIT(imbue, _IO_default_imbue) |
1592 | }; | |
1593 | ||
db3476af | 1594 | const struct _IO_jump_t _IO_file_jumps_maybe_mmap libio_vtable = |
acbee5f6 RM |
1595 | { |
1596 | JUMP_INIT_DUMMY, | |
d18ea0c5 AS |
1597 | JUMP_INIT(finish, _IO_file_finish), |
1598 | JUMP_INIT(overflow, _IO_file_overflow), | |
acbee5f6 | 1599 | JUMP_INIT(underflow, _IO_file_underflow_maybe_mmap), |
d18ea0c5 AS |
1600 | JUMP_INIT(uflow, _IO_default_uflow), |
1601 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
acbee5f6 RM |
1602 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
1603 | JUMP_INIT(xsgetn, _IO_file_xsgetn_maybe_mmap), | |
1604 | JUMP_INIT(seekoff, _IO_file_seekoff_maybe_mmap), | |
1605 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
1606 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), | |
1607 | JUMP_INIT(sync, _IO_new_file_sync), | |
d18ea0c5 AS |
1608 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1609 | JUMP_INIT(read, _IO_file_read), | |
acbee5f6 | 1610 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 | 1611 | JUMP_INIT(seek, _IO_file_seek), |
acbee5f6 | 1612 | JUMP_INIT(close, _IO_file_close), |
d18ea0c5 | 1613 | JUMP_INIT(stat, _IO_file_stat), |
acbee5f6 | 1614 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
dfd2257a | 1615 | JUMP_INIT(imbue, _IO_default_imbue) |
96aa2d94 | 1616 | }; |