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b168057a | 1 | /* Copyright (C) 1993-2015 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
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 | 93 | in external file system is normally _IO_read_end, except in putback |
2482ae43 SP |
94 | mode, when it is _IO_save_end and also when the file is in append mode, |
95 | since switching from read to write mode automatically sends the position in | |
96 | the external file system to the end of file. | |
96aa2d94 RM |
97 | If the field _fb._offset is >= 0, it gives the offset in |
98 | the file as a whole corresponding to eGptr(). (?) | |
99 | ||
100 | PUT MODE: | |
a18f587d UD |
101 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, |
102 | and _IO_read_base are equal to each other. These are usually equal | |
103 | to _IO_buf_base, though not necessarily if we have switched from | |
104 | get mode to put mode. (The reason is to maintain the invariant | |
105 | that _IO_read_end corresponds to the external file position.) | |
1ffb8c90 | 106 | _IO_write_base is non-NULL and usually equal to _IO_buf_base. |
a18f587d UD |
107 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. |
108 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
109 | ||
96aa2d94 RM |
110 | GET MODE: |
111 | If a filebuf is in get or putback mode, eback() != egptr(). | |
112 | In get mode, the unread characters are between gptr() and egptr(). | |
113 | The OS file position corresponds to that of egptr(). | |
a18f587d | 114 | |
96aa2d94 RM |
115 | PUTBACK MODE: |
116 | Putback mode is used to remember "excess" characters that have | |
117 | been sputbackc'd in a separate putback buffer. | |
118 | In putback mode, the get buffer points to the special putback buffer. | |
119 | The unread characters are the characters between gptr() and egptr() | |
120 | in the putback buffer, as well as the area between save_gptr() | |
121 | and save_egptr(), which point into the original reserve buffer. | |
122 | (The pointers save_gptr() and save_egptr() are the values | |
123 | of gptr() and egptr() at the time putback mode was entered.) | |
124 | The OS position corresponds to that of save_egptr(). | |
23396375 | 125 | |
96aa2d94 | 126 | LINE BUFFERED OUTPUT: |
a18f587d | 127 | During line buffered output, _IO_write_base==base() && epptr()==base(). |
96aa2d94 RM |
128 | However, ptr() may be anywhere between base() and ebuf(). |
129 | This forces a call to filebuf::overflow(int C) on every put. | |
130 | If there is more space in the buffer, and C is not a '\n', | |
131 | then C is inserted, and pptr() incremented. | |
23396375 | 132 | |
96aa2d94 RM |
133 | UNBUFFERED STREAMS: |
134 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
135 | */ | |
136 | ||
137 | #define CLOSED_FILEBUF_FLAGS \ | |
138 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
139 | ||
140 | ||
141 | void | |
24b97882 | 142 | _IO_new_file_init (struct _IO_FILE_plus *fp) |
96aa2d94 RM |
143 | { |
144 | /* POSIX.1 allows another file handle to be used to change the position | |
145 | of our file descriptor. Hence we actually don't know the actual | |
146 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
147 | fp->file._offset = _IO_pos_BAD; |
148 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
96aa2d94 | 149 | |
d18ea0c5 | 150 | _IO_link_in (fp); |
2ca8b1ee | 151 | fp->file._fileno = -1; |
96aa2d94 | 152 | } |
d18ea0c5 | 153 | libc_hidden_ver (_IO_new_file_init, _IO_file_init) |
96aa2d94 RM |
154 | |
155 | int | |
24b97882 | 156 | _IO_new_file_close_it (_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 | |
24b97882 | 198 | _IO_new_file_finish (_IO_FILE *fp, int dummy) |
96aa2d94 | 199 | { |
40a55d20 | 200 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
201 | { |
202 | _IO_do_flush (fp); | |
203 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) | |
204 | _IO_SYSCLOSE (fp); | |
205 | } | |
d18ea0c5 | 206 | _IO_default_finish (fp, 0); |
96aa2d94 | 207 | } |
d18ea0c5 | 208 | libc_hidden_ver (_IO_new_file_finish, _IO_file_finish) |
96aa2d94 | 209 | |
bd355af0 | 210 | _IO_FILE * |
24b97882 SP |
211 | _IO_file_open (_IO_FILE *fp, const char *filename, int posix_mode, int prot, |
212 | int read_write, int is32not64) | |
bd355af0 UD |
213 | { |
214 | int fdesc; | |
ee8449f7 | 215 | #ifdef _LIBC |
a1ffb40e | 216 | if (__glibc_unlikely (fp->_flags2 & _IO_FLAGS2_NOTCANCEL)) |
ee8449f7 UD |
217 | fdesc = open_not_cancel (filename, |
218 | posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
219 | else | |
220 | fdesc = open (filename, posix_mode | (is32not64 ? 0 : O_LARGEFILE), prot); | |
bd355af0 UD |
221 | #else |
222 | fdesc = open (filename, posix_mode, prot); | |
223 | #endif | |
224 | if (fdesc < 0) | |
225 | return NULL; | |
226 | fp->_fileno = fdesc; | |
227 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
ea33158c SP |
228 | /* For append mode, send the file offset to the end of the file. Don't |
229 | update the offset cache though, since the file handle is not active. */ | |
230 | if ((read_write & (_IO_IS_APPENDING | _IO_NO_READS)) | |
231 | == (_IO_IS_APPENDING | _IO_NO_READS)) | |
232 | { | |
233 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, 0, _IO_seek_end); | |
234 | if (new_pos == _IO_pos_BAD && errno != ESPIPE) | |
235 | { | |
236 | close_not_cancel (fdesc); | |
237 | return NULL; | |
238 | } | |
239 | } | |
d18ea0c5 | 240 | _IO_link_in ((struct _IO_FILE_plus *) fp); |
bd355af0 UD |
241 | return fp; |
242 | } | |
ee2a5ae8 | 243 | libc_hidden_def (_IO_file_open) |
bd355af0 | 244 | |
96aa2d94 | 245 | _IO_FILE * |
24b97882 SP |
246 | _IO_new_file_fopen (_IO_FILE *fp, const char *filename, const char *mode, |
247 | int is32not64) | |
96aa2d94 RM |
248 | { |
249 | int oflags = 0, omode; | |
bd355af0 | 250 | int read_write; |
96aa2d94 | 251 | int oprot = 0666; |
f38931a9 | 252 | int i; |
4e2e9999 | 253 | _IO_FILE *result; |
129d706d | 254 | #ifdef _LIBC |
4e2e9999 | 255 | const char *cs; |
129d706d | 256 | const char *last_recognized; |
4e2e9999 UD |
257 | #endif |
258 | ||
96aa2d94 RM |
259 | if (_IO_file_is_open (fp)) |
260 | return 0; | |
f38931a9 | 261 | switch (*mode) |
40a55d20 UD |
262 | { |
263 | case 'r': | |
264 | omode = O_RDONLY; | |
265 | read_write = _IO_NO_WRITES; | |
266 | break; | |
267 | case 'w': | |
268 | omode = O_WRONLY; | |
269 | oflags = O_CREAT|O_TRUNC; | |
270 | read_write = _IO_NO_READS; | |
271 | break; | |
272 | case 'a': | |
273 | omode = O_WRONLY; | |
274 | oflags = O_CREAT|O_APPEND; | |
275 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
276 | break; | |
277 | default: | |
278 | __set_errno (EINVAL); | |
279 | return NULL; | |
280 | } | |
129d706d UD |
281 | #ifdef _LIBC |
282 | last_recognized = mode; | |
283 | #endif | |
b722481a | 284 | for (i = 1; i < 7; ++i) |
40a55d20 | 285 | { |
f38931a9 UD |
286 | switch (*++mode) |
287 | { | |
288 | case '\0': | |
289 | break; | |
290 | case '+': | |
291 | omode = O_RDWR; | |
292 | read_write &= _IO_IS_APPENDING; | |
129d706d UD |
293 | #ifdef _LIBC |
294 | last_recognized = mode; | |
295 | #endif | |
f38931a9 UD |
296 | continue; |
297 | case 'x': | |
298 | oflags |= O_EXCL; | |
129d706d UD |
299 | #ifdef _LIBC |
300 | last_recognized = mode; | |
301 | #endif | |
f38931a9 UD |
302 | continue; |
303 | case 'b': | |
129d706d UD |
304 | #ifdef _LIBC |
305 | last_recognized = mode; | |
306 | #endif | |
b7fc6d07 UD |
307 | continue; |
308 | case 'm': | |
309 | fp->_flags2 |= _IO_FLAGS2_MMAP; | |
310 | continue; | |
ee8449f7 UD |
311 | case 'c': |
312 | fp->_flags2 |= _IO_FLAGS2_NOTCANCEL; | |
0d74e043 | 313 | continue; |
65d834b0 | 314 | case 'e': |
94b7cc37 | 315 | #ifdef O_CLOEXEC |
65d834b0 | 316 | oflags |= O_CLOEXEC; |
65d834b0 | 317 | #endif |
94b7cc37 UD |
318 | fp->_flags2 |= _IO_FLAGS2_CLOEXEC; |
319 | continue; | |
f38931a9 UD |
320 | default: |
321 | /* Ignore. */ | |
322 | continue; | |
323 | } | |
324 | break; | |
40a55d20 | 325 | } |
f38931a9 | 326 | |
4e2e9999 UD |
327 | result = _IO_file_open (fp, filename, omode|oflags, oprot, read_write, |
328 | is32not64); | |
329 | ||
a101b025 | 330 | if (result != NULL) |
94b7cc37 | 331 | { |
a101b025 AJ |
332 | #ifndef __ASSUME_O_CLOEXEC |
333 | if ((fp->_flags2 & _IO_FLAGS2_CLOEXEC) != 0 && __have_o_cloexec <= 0) | |
94b7cc37 | 334 | { |
a101b025 AJ |
335 | int fd = _IO_fileno (fp); |
336 | if (__have_o_cloexec == 0) | |
337 | { | |
338 | int flags = __fcntl (fd, F_GETFD); | |
339 | __have_o_cloexec = (flags & FD_CLOEXEC) == 0 ? -1 : 1; | |
340 | } | |
341 | if (__have_o_cloexec < 0) | |
342 | __fcntl (fd, F_SETFD, FD_CLOEXEC); | |
94b7cc37 | 343 | } |
94b7cc37 | 344 | #endif |
4e2e9999 | 345 | |
129d706d UD |
346 | /* Test whether the mode string specifies the conversion. */ |
347 | cs = strstr (last_recognized + 1, ",ccs="); | |
348 | if (cs != NULL) | |
349 | { | |
350 | /* Yep. Load the appropriate conversions and set the orientation | |
351 | to wide. */ | |
352 | struct gconv_fcts fcts; | |
353 | struct _IO_codecvt *cc; | |
354 | char *endp = __strchrnul (cs + 5, ','); | |
355 | char ccs[endp - (cs + 5) + 3]; | |
356 | ||
357 | *((char *) __mempcpy (ccs, cs + 5, endp - (cs + 5))) = '\0'; | |
358 | strip (ccs, ccs); | |
359 | ||
360 | if (__wcsmbs_named_conv (&fcts, ccs[2] == '\0' | |
361 | ? upstr (ccs, cs + 5) : ccs) != 0) | |
362 | { | |
363 | /* Something went wrong, we cannot load the conversion modules. | |
364 | This means we cannot proceed since the user explicitly asked | |
365 | for these. */ | |
d18ea0c5 | 366 | (void) _IO_file_close_it (fp); |
129d706d UD |
367 | __set_errno (EINVAL); |
368 | return NULL; | |
369 | } | |
370 | ||
371 | assert (fcts.towc_nsteps == 1); | |
372 | assert (fcts.tomb_nsteps == 1); | |
373 | ||
374 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
375 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; | |
376 | ||
377 | /* Clear the state. We start all over again. */ | |
378 | memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t)); | |
379 | memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t)); | |
380 | ||
381 | cc = fp->_codecvt = &fp->_wide_data->_codecvt; | |
382 | ||
383 | /* The functions are always the same. */ | |
384 | *cc = __libio_codecvt; | |
385 | ||
386 | cc->__cd_in.__cd.__nsteps = fcts.towc_nsteps; | |
387 | cc->__cd_in.__cd.__steps = fcts.towc; | |
388 | ||
389 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0; | |
390 | cc->__cd_in.__cd.__data[0].__internal_use = 1; | |
391 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
392 | cc->__cd_in.__cd.__data[0].__statep = &result->_wide_data->_IO_state; | |
393 | ||
129d706d UD |
394 | cc->__cd_out.__cd.__nsteps = fcts.tomb_nsteps; |
395 | cc->__cd_out.__cd.__steps = fcts.tomb; | |
396 | ||
397 | cc->__cd_out.__cd.__data[0].__invocation_counter = 0; | |
398 | cc->__cd_out.__cd.__data[0].__internal_use = 1; | |
ba7b4d29 FW |
399 | cc->__cd_out.__cd.__data[0].__flags |
400 | = __GCONV_IS_LAST | __GCONV_TRANSLIT; | |
129d706d UD |
401 | cc->__cd_out.__cd.__data[0].__statep = |
402 | &result->_wide_data->_IO_state; | |
403 | ||
a815c3ab UD |
404 | /* From now on use the wide character callback functions. */ |
405 | ((struct _IO_FILE_plus *) fp)->vtable = fp->_wide_data->_wide_vtable; | |
406 | ||
129d706d UD |
407 | /* Set the mode now. */ |
408 | result->_mode = 1; | |
129d706d | 409 | } |
4e2e9999 | 410 | } |
4e2e9999 UD |
411 | |
412 | return result; | |
96aa2d94 | 413 | } |
d18ea0c5 | 414 | libc_hidden_ver (_IO_new_file_fopen, _IO_file_fopen) |
96aa2d94 | 415 | |
40a55d20 | 416 | _IO_FILE * |
24b97882 | 417 | _IO_new_file_attach (_IO_FILE *fp, int fd) |
96aa2d94 | 418 | { |
40a55d20 | 419 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
420 | return NULL; |
421 | fp->_fileno = fd; | |
422 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
423 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
f65fd747 UD |
424 | /* Get the current position of the file. */ |
425 | /* We have to do that since that may be junk. */ | |
bd355af0 | 426 | fp->_offset = _IO_pos_BAD; |
c4a710b6 | 427 | int save_errno = errno; |
dfd2257a | 428 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) |
f65fd747 UD |
429 | == _IO_pos_BAD && errno != ESPIPE) |
430 | return NULL; | |
11ed3eae | 431 | __set_errno (save_errno); |
96aa2d94 RM |
432 | return fp; |
433 | } | |
d18ea0c5 | 434 | libc_hidden_ver (_IO_new_file_attach, _IO_file_attach) |
96aa2d94 | 435 | |
40a55d20 | 436 | _IO_FILE * |
24b97882 | 437 | _IO_new_file_setbuf (_IO_FILE *fp, char *p, _IO_ssize_t len) |
96aa2d94 | 438 | { |
d64b6ad0 UD |
439 | if (_IO_default_setbuf (fp, p, len) == NULL) |
440 | return NULL; | |
96aa2d94 | 441 | |
d64b6ad0 UD |
442 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end |
443 | = fp->_IO_buf_base; | |
444 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 | 445 | |
d64b6ad0 | 446 | return fp; |
96aa2d94 | 447 | } |
d18ea0c5 | 448 | libc_hidden_ver (_IO_new_file_setbuf, _IO_file_setbuf) |
96aa2d94 | 449 | |
bff334e0 UD |
450 | |
451 | _IO_FILE * | |
24b97882 | 452 | _IO_file_setbuf_mmap (_IO_FILE *fp, char *p, _IO_ssize_t len) |
bff334e0 UD |
453 | { |
454 | _IO_FILE *result; | |
455 | ||
456 | /* Change the function table. */ | |
15a686af | 457 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
bff334e0 UD |
458 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
459 | ||
460 | /* And perform the normal operation. */ | |
461 | result = _IO_new_file_setbuf (fp, p, len); | |
462 | ||
463 | /* If the call failed, restore to using mmap. */ | |
464 | if (result == NULL) | |
465 | { | |
466 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap; | |
467 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
468 | } | |
469 | ||
470 | return result; | |
471 | } | |
472 | ||
0fca3153 | 473 | static _IO_size_t new_do_write (_IO_FILE *, const char *, _IO_size_t); |
0720f75c | 474 | |
96aa2d94 | 475 | /* Write TO_DO bytes from DATA to FP. |
68dbb3a6 | 476 | Then mark FP as having empty buffers. */ |
96aa2d94 RM |
477 | |
478 | int | |
24b97882 | 479 | _IO_new_do_write (_IO_FILE *fp, const char *data, _IO_size_t to_do) |
0720f75c | 480 | { |
6dd67bd5 UD |
481 | return (to_do == 0 |
482 | || (_IO_size_t) new_do_write (fp, data, to_do) == to_do) ? 0 : EOF; | |
0720f75c | 483 | } |
d18ea0c5 | 484 | libc_hidden_ver (_IO_new_do_write, _IO_do_write) |
0720f75c UD |
485 | |
486 | static | |
ccf3ea43 | 487 | _IO_size_t |
24b97882 | 488 | new_do_write (_IO_FILE *fp, const char *data, _IO_size_t to_do) |
96aa2d94 RM |
489 | { |
490 | _IO_size_t count; | |
96aa2d94 RM |
491 | if (fp->_flags & _IO_IS_APPENDING) |
492 | /* On a system without a proper O_APPEND implementation, | |
493 | you would need to sys_seek(0, SEEK_END) here, but is | |
ded5b9b7 | 494 | not needed nor desirable for Unix- or Posix-like systems. |
96aa2d94 RM |
495 | Instead, just indicate that offset (before and after) is |
496 | unpredictable. */ | |
bd355af0 | 497 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 498 | else if (fp->_IO_read_end != fp->_IO_write_base) |
23396375 | 499 | { |
d64b6ad0 | 500 | _IO_off64_t new_pos |
40a55d20 | 501 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
96aa2d94 | 502 | if (new_pos == _IO_pos_BAD) |
0720f75c | 503 | return 0; |
bd355af0 | 504 | fp->_offset = new_pos; |
96aa2d94 RM |
505 | } |
506 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 507 | if (fp->_cur_column && count) |
d18ea0c5 | 508 | fp->_cur_column = _IO_adjust_column (fp->_cur_column - 1, data, count) + 1; |
40a55d20 | 509 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
96aa2d94 | 510 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; |
076bfcf6 | 511 | fp->_IO_write_end = (fp->_mode <= 0 |
d64b6ad0 | 512 | && (fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
40a55d20 | 513 | ? fp->_IO_buf_base : fp->_IO_buf_end); |
0720f75c | 514 | return count; |
96aa2d94 RM |
515 | } |
516 | ||
517 | int | |
24b97882 | 518 | _IO_new_file_underflow (_IO_FILE *fp) |
96aa2d94 RM |
519 | { |
520 | _IO_ssize_t count; | |
521 | #if 0 | |
522 | /* SysV does not make this test; take it out for compatibility */ | |
523 | if (fp->_flags & _IO_EOF_SEEN) | |
524 | return (EOF); | |
525 | #endif | |
526 | ||
527 | if (fp->_flags & _IO_NO_READS) | |
feb3c934 | 528 | { |
58034572 | 529 | fp->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
530 | __set_errno (EBADF); |
531 | return EOF; | |
532 | } | |
96aa2d94 | 533 | if (fp->_IO_read_ptr < fp->_IO_read_end) |
40a55d20 | 534 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 RM |
535 | |
536 | if (fp->_IO_buf_base == NULL) | |
00bc5db0 UD |
537 | { |
538 | /* Maybe we already have a push back pointer. */ | |
539 | if (fp->_IO_save_base != NULL) | |
540 | { | |
541 | free (fp->_IO_save_base); | |
542 | fp->_flags &= ~_IO_IN_BACKUP; | |
543 | } | |
d18ea0c5 | 544 | _IO_doallocbuf (fp); |
00bc5db0 | 545 | } |
96aa2d94 RM |
546 | |
547 | /* Flush all line buffered files before reading. */ | |
548 | /* FIXME This can/should be moved to genops ?? */ | |
549 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
3d759cb8 UD |
550 | { |
551 | #if 0 | |
d18ea0c5 | 552 | _IO_flush_all_linebuffered (); |
3d759cb8 UD |
553 | #else |
554 | /* We used to flush all line-buffered stream. This really isn't | |
555 | required by any standard. My recollection is that | |
556 | traditional Unix systems did this for stdout. stderr better | |
557 | not be line buffered. So we do just that here | |
558 | explicitly. --drepper */ | |
0261d33f | 559 | _IO_acquire_lock (_IO_stdout); |
3d759cb8 UD |
560 | |
561 | if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF)) | |
562 | == (_IO_LINKED | _IO_LINE_BUF)) | |
563 | _IO_OVERFLOW (_IO_stdout, EOF); | |
564 | ||
0261d33f | 565 | _IO_release_lock (_IO_stdout); |
3d759cb8 UD |
566 | #endif |
567 | } | |
96aa2d94 | 568 | |
d18ea0c5 | 569 | _IO_switch_to_get_mode (fp); |
96aa2d94 | 570 | |
2d7da676 UD |
571 | /* This is very tricky. We have to adjust those |
572 | pointers before we call _IO_SYSREAD () since | |
573 | we may longjump () out while waiting for | |
574 | input. Those pointers may be screwed up. H.J. */ | |
575 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
576 | fp->_IO_read_end = fp->_IO_buf_base; | |
577 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
578 | = fp->_IO_buf_base; | |
579 | ||
96aa2d94 RM |
580 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, |
581 | fp->_IO_buf_end - fp->_IO_buf_base); | |
582 | if (count <= 0) | |
583 | { | |
584 | if (count == 0) | |
585 | fp->_flags |= _IO_EOF_SEEN; | |
586 | else | |
587 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
588 | } | |
2d7da676 | 589 | fp->_IO_read_end += count; |
96aa2d94 | 590 | if (count == 0) |
fe8b4d98 SP |
591 | { |
592 | /* If a stream is read to EOF, the calling application may switch active | |
593 | handles. As a result, our offset cache would no longer be valid, so | |
594 | unset it. */ | |
595 | fp->_offset = _IO_pos_BAD; | |
596 | return EOF; | |
597 | } | |
bd355af0 UD |
598 | if (fp->_offset != _IO_pos_BAD) |
599 | _IO_pos_adjust (fp->_offset, count); | |
40a55d20 | 600 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 | 601 | } |
d18ea0c5 | 602 | libc_hidden_ver (_IO_new_file_underflow, _IO_file_underflow) |
96aa2d94 | 603 | |
acbee5f6 RM |
604 | /* Guts of underflow callback if we mmap the file. This stats the file and |
605 | updates the stream state to match. In the normal case we return zero. | |
606 | If the file is no longer eligible for mmap, its jump tables are reset to | |
607 | the vanilla ones and we return nonzero. */ | |
608 | static int | |
609 | mmap_remap_check (_IO_FILE *fp) | |
0469311e | 610 | { |
c8450f70 | 611 | struct stat64 st; |
acbee5f6 RM |
612 | |
613 | if (_IO_SYSSTAT (fp, &st) == 0 | |
614 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
615 | /* Limit the file size to 1MB for 32-bit machines. */ | |
616 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)) | |
0469311e | 617 | { |
acbee5f6 RM |
618 | const size_t pagesize = __getpagesize (); |
619 | # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1)) | |
620 | if (ROUNDED (st.st_size) < ROUNDED (fp->_IO_buf_end | |
621 | - fp->_IO_buf_base)) | |
622 | { | |
623 | /* We can trim off some pages past the end of the file. */ | |
624 | (void) __munmap (fp->_IO_buf_base + ROUNDED (st.st_size), | |
625 | ROUNDED (fp->_IO_buf_end - fp->_IO_buf_base) | |
626 | - ROUNDED (st.st_size)); | |
627 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
628 | } | |
629 | else if (ROUNDED (st.st_size) > ROUNDED (fp->_IO_buf_end | |
630 | - fp->_IO_buf_base)) | |
631 | { | |
632 | /* The file added some pages. We need to remap it. */ | |
633 | void *p; | |
eaae7493 | 634 | #ifdef _G_HAVE_MREMAP |
acbee5f6 RM |
635 | p = __mremap (fp->_IO_buf_base, ROUNDED (fp->_IO_buf_end |
636 | - fp->_IO_buf_base), | |
637 | ROUNDED (st.st_size), MREMAP_MAYMOVE); | |
638 | if (p == MAP_FAILED) | |
639 | { | |
640 | (void) __munmap (fp->_IO_buf_base, | |
641 | fp->_IO_buf_end - fp->_IO_buf_base); | |
642 | goto punt; | |
643 | } | |
644 | #else | |
645 | (void) __munmap (fp->_IO_buf_base, | |
646 | fp->_IO_buf_end - fp->_IO_buf_base); | |
ced52c71 JM |
647 | p = __mmap64 (NULL, st.st_size, PROT_READ, MAP_SHARED, |
648 | fp->_fileno, 0); | |
acbee5f6 RM |
649 | if (p == MAP_FAILED) |
650 | goto punt; | |
651 | #endif | |
652 | fp->_IO_buf_base = p; | |
653 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
654 | } | |
655 | else | |
656 | { | |
657 | /* The number of pages didn't change. */ | |
658 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
659 | } | |
660 | # undef ROUNDED | |
661 | ||
662 | fp->_offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
fc77d66a RM |
663 | _IO_setg (fp, fp->_IO_buf_base, |
664 | fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base | |
665 | ? fp->_IO_buf_base + fp->_offset : fp->_IO_buf_end, | |
acbee5f6 | 666 | fp->_IO_buf_end); |
c4292489 | 667 | |
fc77d66a RM |
668 | /* If we are already positioned at or past the end of the file, don't |
669 | change the current offset. If not, seek past what we have mapped, | |
670 | mimicking the position left by a normal underflow reading into its | |
671 | buffer until EOF. */ | |
672 | ||
673 | if (fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base) | |
674 | { | |
ced52c71 JM |
675 | if (__lseek64 (fp->_fileno, fp->_IO_buf_end - fp->_IO_buf_base, |
676 | SEEK_SET) | |
fc77d66a RM |
677 | != fp->_IO_buf_end - fp->_IO_buf_base) |
678 | fp->_flags |= _IO_ERR_SEEN; | |
679 | else | |
680 | fp->_offset = fp->_IO_buf_end - fp->_IO_buf_base; | |
0469311e | 681 | } |
acbee5f6 RM |
682 | |
683 | return 0; | |
684 | } | |
685 | else | |
686 | { | |
687 | /* Life is no longer good for mmap. Punt it. */ | |
688 | (void) __munmap (fp->_IO_buf_base, | |
689 | fp->_IO_buf_end - fp->_IO_buf_base); | |
690 | punt: | |
691 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; | |
692 | _IO_setg (fp, NULL, NULL, NULL); | |
693 | if (fp->_mode <= 0) | |
15a686af | 694 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
acbee5f6 RM |
695 | else |
696 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
697 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
698 | ||
699 | return 1; | |
0469311e | 700 | } |
acbee5f6 RM |
701 | } |
702 | ||
703 | /* Special callback replacing the underflow callbacks if we mmap the file. */ | |
704 | int | |
705 | _IO_file_underflow_mmap (_IO_FILE *fp) | |
706 | { | |
707 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
708 | return *(unsigned char *) fp->_IO_read_ptr; | |
709 | ||
a1ffb40e | 710 | if (__glibc_unlikely (mmap_remap_check (fp))) |
acbee5f6 RM |
711 | /* We punted to the regular file functions. */ |
712 | return _IO_UNDERFLOW (fp); | |
713 | ||
714 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
715 | return *(unsigned char *) fp->_IO_read_ptr; | |
0469311e UD |
716 | |
717 | fp->_flags |= _IO_EOF_SEEN; | |
718 | return EOF; | |
719 | } | |
720 | ||
acbee5f6 RM |
721 | static void |
722 | decide_maybe_mmap (_IO_FILE *fp) | |
723 | { | |
724 | /* We use the file in read-only mode. This could mean we can | |
725 | mmap the file and use it without any copying. But not all | |
726 | file descriptors are for mmap-able objects and on 32-bit | |
727 | machines we don't want to map files which are too large since | |
728 | this would require too much virtual memory. */ | |
c8450f70 | 729 | struct stat64 st; |
acbee5f6 RM |
730 | |
731 | if (_IO_SYSSTAT (fp, &st) == 0 | |
732 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
733 | /* Limit the file size to 1MB for 32-bit machines. */ | |
734 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024) | |
735 | /* Sanity check. */ | |
736 | && (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size)) | |
737 | { | |
738 | /* Try to map the file. */ | |
739 | void *p; | |
740 | ||
ced52c71 | 741 | p = __mmap64 (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); |
acbee5f6 RM |
742 | if (p != MAP_FAILED) |
743 | { | |
744 | /* OK, we managed to map the file. Set the buffer up and use a | |
745 | special jump table with simplified underflow functions which | |
746 | never tries to read anything from the file. */ | |
747 | ||
ced52c71 | 748 | if (__lseek64 (fp->_fileno, st.st_size, SEEK_SET) != st.st_size) |
acbee5f6 RM |
749 | { |
750 | (void) __munmap (p, st.st_size); | |
751 | fp->_offset = _IO_pos_BAD; | |
752 | } | |
753 | else | |
754 | { | |
d18ea0c5 | 755 | _IO_setb (fp, p, (char *) p + st.st_size, 0); |
acbee5f6 RM |
756 | |
757 | if (fp->_offset == _IO_pos_BAD) | |
758 | fp->_offset = 0; | |
759 | ||
760 | _IO_setg (fp, p, p + fp->_offset, p + st.st_size); | |
761 | fp->_offset = st.st_size; | |
762 | ||
763 | if (fp->_mode <= 0) | |
764 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_file_jumps_mmap; | |
765 | else | |
766 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_wfile_jumps_mmap; | |
767 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
768 | ||
769 | return; | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | /* We couldn't use mmap, so revert to the vanilla file operations. */ | |
775 | ||
776 | if (fp->_mode <= 0) | |
15a686af | 777 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps; |
acbee5f6 RM |
778 | else |
779 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
780 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
781 | } | |
782 | ||
783 | int | |
784 | _IO_file_underflow_maybe_mmap (_IO_FILE *fp) | |
785 | { | |
786 | /* This is the first read attempt. Choose mmap or vanilla operations | |
787 | and then punt to the chosen underflow routine. */ | |
788 | decide_maybe_mmap (fp); | |
789 | return _IO_UNDERFLOW (fp); | |
790 | } | |
791 | ||
792 | ||
96aa2d94 | 793 | int |
24b97882 | 794 | _IO_new_file_overflow (_IO_FILE *f, int ch) |
96aa2d94 RM |
795 | { |
796 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
feb3c934 | 797 | { |
c131718c | 798 | f->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
799 | __set_errno (EBADF); |
800 | return EOF; | |
801 | } | |
96aa2d94 | 802 | /* If currently reading or no buffer allocated. */ |
34c5e4a1 | 803 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0 || f->_IO_write_base == NULL) |
96aa2d94 RM |
804 | { |
805 | /* Allocate a buffer if needed. */ | |
34c5e4a1 | 806 | if (f->_IO_write_base == NULL) |
96aa2d94 | 807 | { |
d18ea0c5 | 808 | _IO_doallocbuf (f); |
96aa2d94 RM |
809 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
810 | } | |
c6645251 UD |
811 | /* Otherwise must be currently reading. |
812 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
813 | logically slide the buffer forwards one block (by setting the | |
814 | read pointers to all point at the beginning of the block). This | |
815 | makes room for subsequent output. | |
816 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
817 | alone, so it can continue to correspond to the external position). */ | |
a1ffb40e | 818 | if (__glibc_unlikely (_IO_in_backup (f))) |
483b8cc6 UD |
819 | { |
820 | size_t nbackup = f->_IO_read_end - f->_IO_read_ptr; | |
d18ea0c5 | 821 | _IO_free_backup_area (f); |
483b8cc6 UD |
822 | f->_IO_read_base -= MIN (nbackup, |
823 | f->_IO_read_base - f->_IO_buf_base); | |
824 | f->_IO_read_ptr = f->_IO_read_base; | |
825 | } | |
eb35b097 UD |
826 | |
827 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
828 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
829 | f->_IO_write_ptr = f->_IO_read_ptr; | |
830 | f->_IO_write_base = f->_IO_write_ptr; | |
831 | f->_IO_write_end = f->_IO_buf_end; | |
832 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
96aa2d94 | 833 | |
96aa2d94 | 834 | f->_flags |= _IO_CURRENTLY_PUTTING; |
076bfcf6 | 835 | if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
bfcd44c3 | 836 | f->_IO_write_end = f->_IO_write_ptr; |
96aa2d94 RM |
837 | } |
838 | if (ch == EOF) | |
d18ea0c5 AS |
839 | return _IO_do_write (f, f->_IO_write_base, |
840 | f->_IO_write_ptr - f->_IO_write_base); | |
96aa2d94 | 841 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
40a55d20 | 842 | if (_IO_do_flush (f) == EOF) |
96aa2d94 RM |
843 | return EOF; |
844 | *f->_IO_write_ptr++ = ch; | |
845 | if ((f->_flags & _IO_UNBUFFERED) | |
846 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
d18ea0c5 AS |
847 | if (_IO_do_write (f, f->_IO_write_base, |
848 | f->_IO_write_ptr - f->_IO_write_base) == EOF) | |
96aa2d94 | 849 | return EOF; |
40a55d20 | 850 | return (unsigned char) ch; |
96aa2d94 | 851 | } |
d18ea0c5 | 852 | libc_hidden_ver (_IO_new_file_overflow, _IO_file_overflow) |
96aa2d94 RM |
853 | |
854 | int | |
24b97882 | 855 | _IO_new_file_sync (_IO_FILE *fp) |
96aa2d94 | 856 | { |
a2bde807 | 857 | _IO_ssize_t delta; |
61eb22d3 UD |
858 | int retval = 0; |
859 | ||
96aa2d94 RM |
860 | /* char* ptr = cur_ptr(); */ |
861 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
862 | if (_IO_do_flush(fp)) return EOF; | |
23396375 | 863 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
96aa2d94 RM |
864 | if (delta != 0) |
865 | { | |
866 | #ifdef TODO | |
40a55d20 UD |
867 | if (_IO_in_backup (fp)) |
868 | delta -= eGptr () - Gbase (); | |
96aa2d94 | 869 | #endif |
dfd2257a UD |
870 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, delta, 1); |
871 | if (new_pos != (_IO_off64_t) EOF) | |
96aa2d94 RM |
872 | fp->_IO_read_end = fp->_IO_read_ptr; |
873 | #ifdef ESPIPE | |
874 | else if (errno == ESPIPE) | |
875 | ; /* Ignore error from unseekable devices. */ | |
876 | #endif | |
877 | else | |
61eb22d3 | 878 | retval = EOF; |
96aa2d94 | 879 | } |
61eb22d3 | 880 | if (retval != EOF) |
bd355af0 | 881 | fp->_offset = _IO_pos_BAD; |
96aa2d94 RM |
882 | /* FIXME: Cleanup - can this be shared? */ |
883 | /* setg(base(), ptr, ptr); */ | |
61eb22d3 | 884 | return retval; |
96aa2d94 | 885 | } |
d18ea0c5 | 886 | libc_hidden_ver (_IO_new_file_sync, _IO_file_sync) |
96aa2d94 | 887 | |
acbee5f6 RM |
888 | static int |
889 | _IO_file_sync_mmap (_IO_FILE *fp) | |
890 | { | |
891 | if (fp->_IO_read_ptr != fp->_IO_read_end) | |
892 | { | |
893 | #ifdef TODO | |
894 | if (_IO_in_backup (fp)) | |
895 | delta -= eGptr () - Gbase (); | |
896 | #endif | |
ced52c71 JM |
897 | if (__lseek64 (fp->_fileno, fp->_IO_read_ptr - fp->_IO_buf_base, |
898 | SEEK_SET) | |
acbee5f6 RM |
899 | != fp->_IO_read_ptr - fp->_IO_buf_base) |
900 | { | |
901 | fp->_flags |= _IO_ERR_SEEN; | |
902 | return EOF; | |
903 | } | |
904 | } | |
905 | fp->_offset = fp->_IO_read_ptr - fp->_IO_buf_base; | |
906 | fp->_IO_read_end = fp->_IO_read_ptr = fp->_IO_read_base; | |
907 | return 0; | |
908 | } | |
909 | ||
ea33158c SP |
910 | /* ftell{,o} implementation. The only time we modify the state of the stream |
911 | is when we have unflushed writes. In that case we seek to the end and | |
912 | record that offset in the stream object. */ | |
000232b9 SP |
913 | static _IO_off64_t |
914 | do_ftell (_IO_FILE *fp) | |
915 | { | |
ea33158c | 916 | _IO_off64_t result, offset = 0; |
000232b9 SP |
917 | |
918 | /* No point looking at unflushed data if we haven't allocated buffers | |
919 | yet. */ | |
920 | if (fp->_IO_buf_base != NULL) | |
921 | { | |
be349d70 | 922 | bool unflushed_writes = fp->_IO_write_ptr > fp->_IO_write_base; |
000232b9 | 923 | |
ea33158c SP |
924 | bool append_mode = (fp->_flags & _IO_IS_APPENDING) == _IO_IS_APPENDING; |
925 | ||
926 | /* When we have unflushed writes in append mode, seek to the end of the | |
927 | file and record that offset. This is the only time we change the file | |
928 | stream state and it is safe since the file handle is active. */ | |
be349d70 | 929 | if (unflushed_writes && append_mode) |
ea33158c SP |
930 | { |
931 | result = _IO_SYSSEEK (fp, 0, _IO_seek_end); | |
932 | if (result == _IO_pos_BAD) | |
933 | return EOF; | |
934 | else | |
935 | fp->_offset = result; | |
936 | } | |
937 | ||
000232b9 | 938 | /* Adjust for unflushed data. */ |
be349d70 | 939 | if (!unflushed_writes) |
ea33158c | 940 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; |
2482ae43 SP |
941 | /* We don't trust _IO_read_end to represent the current file offset when |
942 | writing in append mode because the value would have to be shifted to | |
943 | the end of the file during a flush. Use the write base instead, along | |
944 | with the new offset we got above when we did a seek to the end of the | |
945 | file. */ | |
946 | else if (append_mode) | |
947 | offset += fp->_IO_write_ptr - fp->_IO_write_base; | |
948 | /* For all other modes, _IO_read_end represents the file offset. */ | |
000232b9 | 949 | else |
ea33158c | 950 | offset += fp->_IO_write_ptr - fp->_IO_read_end; |
000232b9 SP |
951 | } |
952 | ||
ea33158c SP |
953 | if (fp->_offset != _IO_pos_BAD) |
954 | result = fp->_offset; | |
fa3cd248 | 955 | else |
ea33158c | 956 | result = _IO_SYSSEEK (fp, 0, _IO_seek_cur); |
fa3cd248 SP |
957 | |
958 | if (result == EOF) | |
959 | return result; | |
960 | ||
ea33158c SP |
961 | result += offset; |
962 | ||
000232b9 SP |
963 | if (result < 0) |
964 | { | |
965 | __set_errno (EINVAL); | |
966 | return EOF; | |
967 | } | |
968 | ||
969 | return result; | |
970 | } | |
971 | ||
d64b6ad0 | 972 | _IO_off64_t |
24b97882 | 973 | _IO_new_file_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode) |
96aa2d94 | 974 | { |
d64b6ad0 | 975 | _IO_off64_t result; |
dfd2257a | 976 | _IO_off64_t delta, new_offset; |
96aa2d94 | 977 | long count; |
000232b9 SP |
978 | |
979 | /* Short-circuit into a separate function. We don't want to mix any | |
980 | functionality and we don't want to touch anything inside the FILE | |
981 | object. */ | |
982 | if (mode == 0) | |
983 | return do_ftell (fp); | |
984 | ||
feb3c934 UD |
985 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file |
986 | offset of the underlying file must be exact. */ | |
987 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
988 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
96aa2d94 | 989 | |
adb26fae SP |
990 | bool was_writing = (fp->_IO_write_ptr > fp->_IO_write_base |
991 | || _IO_in_put_mode (fp)); | |
992 | ||
96aa2d94 RM |
993 | /* Flush unwritten characters. |
994 | (This may do an unneeded write if we seek within the buffer. | |
995 | But to be able to switch to reading, we would need to set | |
2b4f00d1 | 996 | egptr to pptr. That can't be done in the current design, |
96aa2d94 RM |
997 | which assumes file_ptr() is eGptr. Anyway, since we probably |
998 | end up flushing when we close(), it doesn't make much difference.) | |
2b4f00d1 | 999 | FIXME: simulate mem-mapped files. */ |
000232b9 | 1000 | if (was_writing && _IO_switch_to_get_mode (fp)) |
adb26fae | 1001 | return EOF; |
96aa2d94 RM |
1002 | |
1003 | if (fp->_IO_buf_base == NULL) | |
1004 | { | |
00bc5db0 UD |
1005 | /* It could be that we already have a pushback buffer. */ |
1006 | if (fp->_IO_read_base != NULL) | |
1007 | { | |
1008 | free (fp->_IO_read_base); | |
1009 | fp->_flags &= ~_IO_IN_BACKUP; | |
1010 | } | |
d18ea0c5 | 1011 | _IO_doallocbuf (fp); |
40a55d20 UD |
1012 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
1013 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 RM |
1014 | } |
1015 | ||
1016 | switch (dir) | |
1017 | { | |
1018 | case _IO_seek_cur: | |
1019 | /* Adjust for read-ahead (bytes is buffer). */ | |
000232b9 | 1020 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; |
adb26fae | 1021 | |
bd355af0 | 1022 | if (fp->_offset == _IO_pos_BAD) |
000232b9 | 1023 | goto dumb; |
96aa2d94 | 1024 | /* Make offset absolute, assuming current pointer is file_ptr(). */ |
d64b6ad0 | 1025 | offset += fp->_offset; |
405550bf UD |
1026 | if (offset < 0) |
1027 | { | |
1028 | __set_errno (EINVAL); | |
1029 | return EOF; | |
1030 | } | |
96aa2d94 RM |
1031 | |
1032 | dir = _IO_seek_set; | |
1033 | break; | |
1034 | case _IO_seek_set: | |
1035 | break; | |
1036 | case _IO_seek_end: | |
1037 | { | |
c8450f70 | 1038 | struct stat64 st; |
40a55d20 | 1039 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
96aa2d94 RM |
1040 | { |
1041 | offset += st.st_size; | |
1042 | dir = _IO_seek_set; | |
1043 | } | |
1044 | else | |
1045 | goto dumb; | |
1046 | } | |
1047 | } | |
1048 | /* At this point, dir==_IO_seek_set. */ | |
1049 | ||
1050 | /* If destination is within current buffer, optimize: */ | |
bd355af0 | 1051 | if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL |
96aa2d94 RM |
1052 | && !_IO_in_backup (fp)) |
1053 | { | |
c03c66dd UD |
1054 | _IO_off64_t start_offset = (fp->_offset |
1055 | - (fp->_IO_read_end - fp->_IO_buf_base)); | |
1056 | if (offset >= start_offset && offset < fp->_offset) | |
96aa2d94 | 1057 | { |
c03c66dd UD |
1058 | _IO_setg (fp, fp->_IO_buf_base, |
1059 | fp->_IO_buf_base + (offset - start_offset), | |
1060 | fp->_IO_read_end); | |
1061 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1062 | ||
00bc5db0 | 1063 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 1064 | goto resync; |
96aa2d94 | 1065 | } |
96aa2d94 RM |
1066 | } |
1067 | ||
96aa2d94 RM |
1068 | if (fp->_flags & _IO_NO_READS) |
1069 | goto dumb; | |
1070 | ||
1071 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
1072 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
1073 | delta = offset - new_offset; | |
1074 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
1075 | { | |
1076 | new_offset = offset; | |
1077 | delta = 0; | |
1078 | } | |
1079 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
1080 | if (result < 0) | |
1081 | return EOF; | |
1082 | if (delta == 0) | |
1083 | count = 0; | |
1084 | else | |
1085 | { | |
1086 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
feb3c934 UD |
1087 | (must_be_exact |
1088 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
96aa2d94 RM |
1089 | if (count < delta) |
1090 | { | |
1091 | /* We weren't allowed to read, but try to seek the remainder. */ | |
1092 | offset = count == EOF ? delta : delta-count; | |
1093 | dir = _IO_seek_cur; | |
1094 | goto dumb; | |
1095 | } | |
1096 | } | |
40a55d20 UD |
1097 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, |
1098 | fp->_IO_buf_base + count); | |
1099 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
bd355af0 | 1100 | fp->_offset = result + count; |
40a55d20 | 1101 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
96aa2d94 RM |
1102 | return offset; |
1103 | dumb: | |
1104 | ||
d18ea0c5 | 1105 | _IO_unsave_markers (fp); |
96aa2d94 RM |
1106 | result = _IO_SYSSEEK (fp, offset, dir); |
1107 | if (result != EOF) | |
d762684b UD |
1108 | { |
1109 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1110 | fp->_offset = result; | |
1111 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1112 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1113 | } | |
96aa2d94 | 1114 | return result; |
4a582094 UD |
1115 | |
1116 | resync: | |
1117 | /* We need to do it since it is possible that the file offset in | |
1118 | the kernel may be changed behind our back. It may happen when | |
1119 | we fopen a file and then do a fork. One process may access the | |
ded5b9b7 | 1120 | file and the kernel file offset will be changed. */ |
4a582094 UD |
1121 | if (fp->_offset >= 0) |
1122 | _IO_SYSSEEK (fp, fp->_offset, 0); | |
1123 | ||
1124 | return offset; | |
96aa2d94 | 1125 | } |
d18ea0c5 | 1126 | libc_hidden_ver (_IO_new_file_seekoff, _IO_file_seekoff) |
96aa2d94 | 1127 | |
284749da | 1128 | _IO_off64_t |
24b97882 | 1129 | _IO_file_seekoff_mmap (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode) |
284749da UD |
1130 | { |
1131 | _IO_off64_t result; | |
1132 | ||
7e93f915 RM |
1133 | /* If we are only interested in the current position, calculate it and |
1134 | return right now. This calculation does the right thing when we are | |
1135 | using a pushback buffer, but in the usual case has the same value as | |
1136 | (fp->_IO_read_ptr - fp->_IO_buf_base). */ | |
284749da | 1137 | if (mode == 0) |
78ce5a3b | 1138 | return fp->_offset - (fp->_IO_read_end - fp->_IO_read_ptr); |
284749da UD |
1139 | |
1140 | switch (dir) | |
1141 | { | |
1142 | case _IO_seek_cur: | |
1143 | /* Adjust for read-ahead (bytes is buffer). */ | |
1144 | offset += fp->_IO_read_ptr - fp->_IO_read_base; | |
1145 | break; | |
1146 | case _IO_seek_set: | |
1147 | break; | |
1148 | case _IO_seek_end: | |
903b3396 | 1149 | offset += fp->_IO_buf_end - fp->_IO_buf_base; |
284749da UD |
1150 | break; |
1151 | } | |
1152 | /* At this point, dir==_IO_seek_set. */ | |
1153 | ||
1154 | if (offset < 0) | |
66bff409 UD |
1155 | { |
1156 | /* No negative offsets are valid. */ | |
1157 | __set_errno (EINVAL); | |
1158 | return EOF; | |
1159 | } | |
284749da | 1160 | |
284749da UD |
1161 | result = _IO_SYSSEEK (fp, offset, 0); |
1162 | if (result < 0) | |
1163 | return EOF; | |
1164 | ||
fc77d66a RM |
1165 | if (offset > fp->_IO_buf_end - fp->_IO_buf_base) |
1166 | /* One can fseek arbitrarily past the end of the file | |
1167 | and it is meaningless until one attempts to read. | |
1168 | Leave the buffer pointers in EOF state until underflow. */ | |
1169 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_end, fp->_IO_buf_end); | |
1170 | else | |
1171 | /* Adjust the read pointers to match the file position, | |
1172 | but so the next read attempt will call underflow. */ | |
1173 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + offset, | |
1174 | fp->_IO_buf_base + offset); | |
1175 | ||
66bff409 | 1176 | fp->_offset = result; |
284749da UD |
1177 | |
1178 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1179 | ||
1180 | return offset; | |
1181 | } | |
1182 | ||
f5bf21a7 UD |
1183 | static _IO_off64_t |
1184 | _IO_file_seekoff_maybe_mmap (_IO_FILE *fp, _IO_off64_t offset, int dir, | |
1185 | int mode) | |
acbee5f6 RM |
1186 | { |
1187 | /* We only get here when we haven't tried to read anything yet. | |
1188 | So there is nothing more useful for us to do here than just | |
1189 | the underlying lseek call. */ | |
1190 | ||
1191 | _IO_off64_t result = _IO_SYSSEEK (fp, offset, dir); | |
1192 | if (result < 0) | |
1193 | return EOF; | |
1194 | ||
1195 | fp->_offset = result; | |
1196 | return result; | |
1197 | } | |
1198 | ||
96aa2d94 | 1199 | _IO_ssize_t |
24b97882 | 1200 | _IO_file_read (_IO_FILE *fp, void *buf, _IO_ssize_t size) |
96aa2d94 | 1201 | { |
e3c54d80 | 1202 | return (__builtin_expect (fp->_flags2 & _IO_FLAGS2_NOTCANCEL, 0) |
ee8449f7 UD |
1203 | ? read_not_cancel (fp->_fileno, buf, size) |
1204 | : read (fp->_fileno, buf, size)); | |
96aa2d94 | 1205 | } |
d18ea0c5 | 1206 | libc_hidden_def (_IO_file_read) |
96aa2d94 | 1207 | |
d64b6ad0 | 1208 | _IO_off64_t |
24b97882 | 1209 | _IO_file_seek (_IO_FILE *fp, _IO_off64_t offset, int dir) |
96aa2d94 | 1210 | { |
ced52c71 | 1211 | return __lseek64 (fp->_fileno, offset, dir); |
96aa2d94 | 1212 | } |
d18ea0c5 | 1213 | libc_hidden_def (_IO_file_seek) |
96aa2d94 RM |
1214 | |
1215 | int | |
24b97882 | 1216 | _IO_file_stat (_IO_FILE *fp, void *st) |
96aa2d94 | 1217 | { |
ced52c71 | 1218 | return __fxstat64 (_STAT_VER, fp->_fileno, (struct stat64 *) st); |
96aa2d94 | 1219 | } |
d18ea0c5 | 1220 | libc_hidden_def (_IO_file_stat) |
96aa2d94 | 1221 | |
0469311e | 1222 | int |
24b97882 | 1223 | _IO_file_close_mmap (_IO_FILE *fp) |
0469311e | 1224 | { |
acbee5f6 RM |
1225 | /* In addition to closing the file descriptor we have to unmap the file. */ |
1226 | (void) __munmap (fp->_IO_buf_base, fp->_IO_buf_end - fp->_IO_buf_base); | |
0469311e | 1227 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; |
73299943 UD |
1228 | /* Cancelling close should be avoided if possible since it leaves an |
1229 | unrecoverable state behind. */ | |
1230 | return close_not_cancel (fp->_fileno); | |
0469311e UD |
1231 | } |
1232 | ||
96aa2d94 | 1233 | int |
24b97882 | 1234 | _IO_file_close (_IO_FILE *fp) |
96aa2d94 | 1235 | { |
73299943 UD |
1236 | /* Cancelling close should be avoided if possible since it leaves an |
1237 | unrecoverable state behind. */ | |
1238 | return close_not_cancel (fp->_fileno); | |
96aa2d94 | 1239 | } |
d18ea0c5 | 1240 | libc_hidden_def (_IO_file_close) |
96aa2d94 RM |
1241 | |
1242 | _IO_ssize_t | |
24b97882 | 1243 | _IO_new_file_write (_IO_FILE *f, const void *data, _IO_ssize_t n) |
96aa2d94 RM |
1244 | { |
1245 | _IO_ssize_t to_do = n; | |
1246 | while (to_do > 0) | |
1247 | { | |
3d110c7c EB |
1248 | _IO_ssize_t count = (__builtin_expect (f->_flags2 |
1249 | & _IO_FLAGS2_NOTCANCEL, 0) | |
1250 | ? write_not_cancel (f->_fileno, data, to_do) | |
1251 | : write (f->_fileno, data, to_do)); | |
d64b6ad0 | 1252 | if (count < 0) |
96aa2d94 | 1253 | { |
39e16978 UD |
1254 | f->_flags |= _IO_ERR_SEEN; |
1255 | break; | |
b722481a | 1256 | } |
96aa2d94 | 1257 | to_do -= count; |
40a55d20 | 1258 | data = (void *) ((char *) data + count); |
96aa2d94 RM |
1259 | } |
1260 | n -= to_do; | |
bd355af0 UD |
1261 | if (f->_offset >= 0) |
1262 | f->_offset += n; | |
3d110c7c | 1263 | return n; |
96aa2d94 RM |
1264 | } |
1265 | ||
1266 | _IO_size_t | |
24b97882 | 1267 | _IO_new_file_xsputn (_IO_FILE *f, const void *data, _IO_size_t n) |
96aa2d94 | 1268 | { |
2e09a79a | 1269 | const char *s = (const char *) data; |
96aa2d94 RM |
1270 | _IO_size_t to_do = n; |
1271 | int must_flush = 0; | |
cae6ebb2 | 1272 | _IO_size_t count = 0; |
96aa2d94 RM |
1273 | |
1274 | if (n <= 0) | |
1275 | return 0; | |
1276 | /* This is an optimized implementation. | |
1277 | If the amount to be written straddles a block boundary | |
1278 | (or the filebuf is unbuffered), use sys_write directly. */ | |
1279 | ||
1280 | /* First figure out how much space is available in the buffer. */ | |
96aa2d94 RM |
1281 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) |
1282 | { | |
1283 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
1284 | if (count >= n) | |
40a55d20 | 1285 | { |
2e09a79a | 1286 | const char *p; |
96aa2d94 RM |
1287 | for (p = s + n; p > s; ) |
1288 | { | |
40a55d20 UD |
1289 | if (*--p == '\n') |
1290 | { | |
1291 | count = p - s + 1; | |
1292 | must_flush = 1; | |
1293 | break; | |
1294 | } | |
96aa2d94 RM |
1295 | } |
1296 | } | |
1297 | } | |
cae6ebb2 UD |
1298 | else if (f->_IO_write_end > f->_IO_write_ptr) |
1299 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ | |
1300 | ||
96aa2d94 RM |
1301 | /* Then fill the buffer. */ |
1302 | if (count > 0) | |
1303 | { | |
1304 | if (count > to_do) | |
1305 | count = to_do; | |
86187531 | 1306 | #ifdef _LIBC |
20fde227 | 1307 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); |
86187531 | 1308 | #else |
20fde227 DM |
1309 | memcpy (f->_IO_write_ptr, s, count); |
1310 | f->_IO_write_ptr += count; | |
86187531 | 1311 | #endif |
20fde227 | 1312 | s += count; |
96aa2d94 RM |
1313 | to_do -= count; |
1314 | } | |
1315 | if (to_do + must_flush > 0) | |
40a55d20 | 1316 | { |
0720f75c | 1317 | _IO_size_t block_size, do_write; |
96aa2d94 | 1318 | /* Next flush the (full) buffer. */ |
5c8d1fc0 | 1319 | if (_IO_OVERFLOW (f, EOF) == EOF) |
3d110c7c EB |
1320 | /* If nothing else has to be written we must not signal the |
1321 | caller that everything has been written. */ | |
1322 | return to_do == 0 ? EOF : n - to_do; | |
96aa2d94 | 1323 | |
3d110c7c | 1324 | /* Try to maintain alignment: write a whole number of blocks. */ |
96aa2d94 | 1325 | block_size = f->_IO_buf_end - f->_IO_buf_base; |
0720f75c UD |
1326 | do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); |
1327 | ||
1328 | if (do_write) | |
b722481a | 1329 | { |
0720f75c UD |
1330 | count = new_do_write (f, s, do_write); |
1331 | to_do -= count; | |
1332 | if (count < do_write) | |
1333 | return n - to_do; | |
b722481a | 1334 | } |
23396375 | 1335 | |
96aa2d94 RM |
1336 | /* Now write out the remainder. Normally, this will fit in the |
1337 | buffer, but it's somewhat messier for line-buffered files, | |
1338 | so we let _IO_default_xsputn handle the general case. */ | |
0720f75c | 1339 | if (to_do) |
d18ea0c5 | 1340 | to_do -= _IO_default_xsputn (f, s+do_write, to_do); |
96aa2d94 RM |
1341 | } |
1342 | return n - to_do; | |
1343 | } | |
d18ea0c5 | 1344 | libc_hidden_ver (_IO_new_file_xsputn, _IO_file_xsputn) |
96aa2d94 | 1345 | |
96aa2d94 | 1346 | _IO_size_t |
24b97882 | 1347 | _IO_file_xsgetn (_IO_FILE *fp, void *data, _IO_size_t n) |
96aa2d94 | 1348 | { |
2e09a79a JM |
1349 | _IO_size_t want, have; |
1350 | _IO_ssize_t count; | |
1351 | char *s = data; | |
8fe0fd03 UD |
1352 | |
1353 | want = n; | |
1354 | ||
310f9518 UD |
1355 | if (fp->_IO_buf_base == NULL) |
1356 | { | |
1357 | /* Maybe we already have a push back pointer. */ | |
1358 | if (fp->_IO_save_base != NULL) | |
1359 | { | |
1360 | free (fp->_IO_save_base); | |
1361 | fp->_flags &= ~_IO_IN_BACKUP; | |
1362 | } | |
d18ea0c5 | 1363 | _IO_doallocbuf (fp); |
310f9518 UD |
1364 | } |
1365 | ||
8fe0fd03 | 1366 | while (want > 0) |
96aa2d94 | 1367 | { |
8fe0fd03 UD |
1368 | have = fp->_IO_read_end - fp->_IO_read_ptr; |
1369 | if (want <= have) | |
96aa2d94 | 1370 | { |
8fe0fd03 UD |
1371 | memcpy (s, fp->_IO_read_ptr, want); |
1372 | fp->_IO_read_ptr += want; | |
1373 | want = 0; | |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | if (have > 0) | |
96aa2d94 | 1378 | { |
279eb600 UD |
1379 | #ifdef _LIBC |
1380 | s = __mempcpy (s, fp->_IO_read_ptr, have); | |
1381 | #else | |
8fe0fd03 | 1382 | memcpy (s, fp->_IO_read_ptr, have); |
8fe0fd03 | 1383 | s += have; |
279eb600 UD |
1384 | #endif |
1385 | want -= have; | |
8fe0fd03 | 1386 | fp->_IO_read_ptr += have; |
96aa2d94 | 1387 | } |
8fe0fd03 UD |
1388 | |
1389 | /* Check for backup and repeat */ | |
1390 | if (_IO_in_backup (fp)) | |
96aa2d94 | 1391 | { |
8fe0fd03 UD |
1392 | _IO_switch_to_main_get_area (fp); |
1393 | continue; | |
1394 | } | |
1395 | ||
1396 | /* If we now want less than a buffer, underflow and repeat | |
1397 | the copy. Otherwise, _IO_SYSREAD directly to | |
1398 | the user buffer. */ | |
6dd67bd5 UD |
1399 | if (fp->_IO_buf_base |
1400 | && want < (size_t) (fp->_IO_buf_end - fp->_IO_buf_base)) | |
8fe0fd03 UD |
1401 | { |
1402 | if (__underflow (fp) == EOF) | |
1403 | break; | |
1404 | ||
1405 | continue; | |
1406 | } | |
1407 | ||
4bca4c17 UD |
1408 | /* These must be set before the sysread as we might longjmp out |
1409 | waiting for input. */ | |
1410 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1411 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1412 | ||
279eb600 UD |
1413 | /* Try to maintain alignment: read a whole number of blocks. */ |
1414 | count = want; | |
1415 | if (fp->_IO_buf_base) | |
1416 | { | |
1417 | _IO_size_t block_size = fp->_IO_buf_end - fp->_IO_buf_base; | |
1418 | if (block_size >= 128) | |
1419 | count -= want % block_size; | |
1420 | } | |
1421 | ||
1422 | count = _IO_SYSREAD (fp, s, count); | |
96aa2d94 | 1423 | if (count <= 0) |
8fe0fd03 UD |
1424 | { |
1425 | if (count == 0) | |
1426 | fp->_flags |= _IO_EOF_SEEN; | |
1427 | else | |
1428 | fp->_flags |= _IO_ERR_SEEN; | |
1429 | ||
1430 | break; | |
1431 | } | |
23396375 | 1432 | |
96aa2d94 | 1433 | s += count; |
8fe0fd03 | 1434 | want -= count; |
4bca4c17 UD |
1435 | if (fp->_offset != _IO_pos_BAD) |
1436 | _IO_pos_adjust (fp->_offset, count); | |
96aa2d94 | 1437 | } |
96aa2d94 | 1438 | } |
8fe0fd03 UD |
1439 | |
1440 | return n - want; | |
96aa2d94 | 1441 | } |
d18ea0c5 | 1442 | libc_hidden_def (_IO_file_xsgetn) |
96aa2d94 | 1443 | |
284749da | 1444 | static _IO_size_t |
24b97882 | 1445 | _IO_file_xsgetn_mmap (_IO_FILE *fp, void *data, _IO_size_t n) |
284749da | 1446 | { |
2e09a79a | 1447 | _IO_size_t have; |
284749da | 1448 | char *read_ptr = fp->_IO_read_ptr; |
2e09a79a | 1449 | char *s = (char *) data; |
284749da UD |
1450 | |
1451 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1452 | ||
1453 | if (have < n) | |
1454 | { | |
a1ffb40e | 1455 | if (__glibc_unlikely (_IO_in_backup (fp))) |
b39d5719 UD |
1456 | { |
1457 | #ifdef _LIBC | |
1458 | s = __mempcpy (s, read_ptr, have); | |
1459 | #else | |
1460 | memcpy (s, read_ptr, have); | |
1461 | s += have; | |
1462 | #endif | |
1463 | n -= have; | |
1464 | _IO_switch_to_main_get_area (fp); | |
1465 | read_ptr = fp->_IO_read_ptr; | |
1466 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1467 | } | |
1468 | ||
1469 | if (have < n) | |
1470 | { | |
acbee5f6 | 1471 | /* Check that we are mapping all of the file, in case it grew. */ |
a1ffb40e | 1472 | if (__glibc_unlikely (mmap_remap_check (fp))) |
acbee5f6 RM |
1473 | /* We punted mmap, so complete with the vanilla code. */ |
1474 | return s - (char *) data + _IO_XSGETN (fp, data, n); | |
1475 | ||
1476 | read_ptr = fp->_IO_read_ptr; | |
1477 | have = fp->_IO_read_end - read_ptr; | |
b39d5719 | 1478 | } |
284749da UD |
1479 | } |
1480 | ||
c4292489 UD |
1481 | if (have < n) |
1482 | fp->_flags |= _IO_EOF_SEEN; | |
1483 | ||
1484 | if (have != 0) | |
284749da UD |
1485 | { |
1486 | have = MIN (have, n); | |
b39d5719 UD |
1487 | #ifdef _LIBC |
1488 | s = __mempcpy (s, read_ptr, have); | |
1489 | #else | |
1490 | memcpy (s, read_ptr, have); | |
1491 | s += have; | |
1492 | #endif | |
284749da UD |
1493 | fp->_IO_read_ptr = read_ptr + have; |
1494 | } | |
1495 | ||
b39d5719 | 1496 | return s - (char *) data; |
284749da UD |
1497 | } |
1498 | ||
acbee5f6 | 1499 | static _IO_size_t |
24b97882 | 1500 | _IO_file_xsgetn_maybe_mmap (_IO_FILE *fp, void *data, _IO_size_t n) |
acbee5f6 RM |
1501 | { |
1502 | /* We only get here if this is the first attempt to read something. | |
1503 | Decide which operations to use and then punt to the chosen one. */ | |
1504 | ||
1505 | decide_maybe_mmap (fp); | |
1506 | return _IO_XSGETN (fp, data, n); | |
1507 | } | |
1508 | ||
94b68ee9 RM |
1509 | #ifdef _LIBC |
1510 | versioned_symbol (libc, _IO_new_do_write, _IO_do_write, GLIBC_2_1); | |
1511 | versioned_symbol (libc, _IO_new_file_attach, _IO_file_attach, GLIBC_2_1); | |
1512 | versioned_symbol (libc, _IO_new_file_close_it, _IO_file_close_it, GLIBC_2_1); | |
1513 | versioned_symbol (libc, _IO_new_file_finish, _IO_file_finish, GLIBC_2_1); | |
1514 | versioned_symbol (libc, _IO_new_file_fopen, _IO_file_fopen, GLIBC_2_1); | |
1515 | versioned_symbol (libc, _IO_new_file_init, _IO_file_init, GLIBC_2_1); | |
1516 | versioned_symbol (libc, _IO_new_file_setbuf, _IO_file_setbuf, GLIBC_2_1); | |
1517 | versioned_symbol (libc, _IO_new_file_sync, _IO_file_sync, GLIBC_2_1); | |
1518 | versioned_symbol (libc, _IO_new_file_overflow, _IO_file_overflow, GLIBC_2_1); | |
1519 | versioned_symbol (libc, _IO_new_file_seekoff, _IO_file_seekoff, GLIBC_2_1); | |
1520 | versioned_symbol (libc, _IO_new_file_underflow, _IO_file_underflow, GLIBC_2_1); | |
1521 | versioned_symbol (libc, _IO_new_file_write, _IO_file_write, GLIBC_2_1); | |
1522 | versioned_symbol (libc, _IO_new_file_xsputn, _IO_file_xsputn, GLIBC_2_1); | |
1523 | #endif | |
1524 | ||
b2637a22 | 1525 | const struct _IO_jump_t _IO_file_jumps = |
40a55d20 | 1526 | { |
96aa2d94 | 1527 | JUMP_INIT_DUMMY, |
d18ea0c5 AS |
1528 | JUMP_INIT(finish, _IO_file_finish), |
1529 | JUMP_INIT(overflow, _IO_file_overflow), | |
1530 | JUMP_INIT(underflow, _IO_file_underflow), | |
1531 | JUMP_INIT(uflow, _IO_default_uflow), | |
1532 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
1533 | JUMP_INIT(xsputn, _IO_file_xsputn), | |
1534 | JUMP_INIT(xsgetn, _IO_file_xsgetn), | |
b259e746 | 1535 | JUMP_INIT(seekoff, _IO_new_file_seekoff), |
96aa2d94 | 1536 | JUMP_INIT(seekpos, _IO_default_seekpos), |
b259e746 UD |
1537 | JUMP_INIT(setbuf, _IO_new_file_setbuf), |
1538 | JUMP_INIT(sync, _IO_new_file_sync), | |
d18ea0c5 AS |
1539 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1540 | JUMP_INIT(read, _IO_file_read), | |
b259e746 | 1541 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 AS |
1542 | JUMP_INIT(seek, _IO_file_seek), |
1543 | JUMP_INIT(close, _IO_file_close), | |
1544 | JUMP_INIT(stat, _IO_file_stat), | |
dfd2257a | 1545 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
0469311e UD |
1546 | JUMP_INIT(imbue, _IO_default_imbue) |
1547 | }; | |
15a686af | 1548 | libc_hidden_data_def (_IO_file_jumps) |
0469311e | 1549 | |
b2637a22 | 1550 | const struct _IO_jump_t _IO_file_jumps_mmap = |
0469311e UD |
1551 | { |
1552 | JUMP_INIT_DUMMY, | |
d18ea0c5 AS |
1553 | JUMP_INIT(finish, _IO_file_finish), |
1554 | JUMP_INIT(overflow, _IO_file_overflow), | |
0469311e | 1555 | JUMP_INIT(underflow, _IO_file_underflow_mmap), |
d18ea0c5 AS |
1556 | JUMP_INIT(uflow, _IO_default_uflow), |
1557 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
0469311e | 1558 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
284749da UD |
1559 | JUMP_INIT(xsgetn, _IO_file_xsgetn_mmap), |
1560 | JUMP_INIT(seekoff, _IO_file_seekoff_mmap), | |
0469311e | 1561 | JUMP_INIT(seekpos, _IO_default_seekpos), |
bff334e0 | 1562 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), |
acbee5f6 | 1563 | JUMP_INIT(sync, _IO_file_sync_mmap), |
d18ea0c5 AS |
1564 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1565 | JUMP_INIT(read, _IO_file_read), | |
0469311e | 1566 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 | 1567 | JUMP_INIT(seek, _IO_file_seek), |
0469311e | 1568 | JUMP_INIT(close, _IO_file_close_mmap), |
d18ea0c5 | 1569 | JUMP_INIT(stat, _IO_file_stat), |
0469311e | 1570 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
acbee5f6 RM |
1571 | JUMP_INIT(imbue, _IO_default_imbue) |
1572 | }; | |
1573 | ||
b2637a22 | 1574 | const struct _IO_jump_t _IO_file_jumps_maybe_mmap = |
acbee5f6 RM |
1575 | { |
1576 | JUMP_INIT_DUMMY, | |
d18ea0c5 AS |
1577 | JUMP_INIT(finish, _IO_file_finish), |
1578 | JUMP_INIT(overflow, _IO_file_overflow), | |
acbee5f6 | 1579 | JUMP_INIT(underflow, _IO_file_underflow_maybe_mmap), |
d18ea0c5 AS |
1580 | JUMP_INIT(uflow, _IO_default_uflow), |
1581 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
acbee5f6 RM |
1582 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
1583 | JUMP_INIT(xsgetn, _IO_file_xsgetn_maybe_mmap), | |
1584 | JUMP_INIT(seekoff, _IO_file_seekoff_maybe_mmap), | |
1585 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
1586 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), | |
1587 | JUMP_INIT(sync, _IO_new_file_sync), | |
d18ea0c5 AS |
1588 | JUMP_INIT(doallocate, _IO_file_doallocate), |
1589 | JUMP_INIT(read, _IO_file_read), | |
acbee5f6 | 1590 | JUMP_INIT(write, _IO_new_file_write), |
d18ea0c5 | 1591 | JUMP_INIT(seek, _IO_file_seek), |
acbee5f6 | 1592 | JUMP_INIT(close, _IO_file_close), |
d18ea0c5 | 1593 | JUMP_INIT(stat, _IO_file_stat), |
acbee5f6 | 1594 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
dfd2257a | 1595 | JUMP_INIT(imbue, _IO_default_imbue) |
96aa2d94 | 1596 | }; |