Commit | Line | Data |
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b226295a | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2006, 2007, 2008 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
8ab3d8a0 KR |
21 | #define _LARGEFILE64_SOURCE /* ask for stat64 etc */ |
22 | ||
dbb605f5 | 23 | #ifdef HAVE_CONFIG_H |
85286595 RB |
24 | # include <config.h> |
25 | #endif | |
0f2d19dd JB |
26 | |
27 | #include <stdio.h> | |
cb63cf9e | 28 | #include <fcntl.h> |
a0599745 MD |
29 | #include "libguile/_scm.h" |
30 | #include "libguile/strings.h" | |
a0599745 | 31 | #include "libguile/validate.h" |
6b72ac1d | 32 | #include "libguile/gc.h" |
eb372585 | 33 | #include "libguile/posix.h" |
7f9994d9 | 34 | #include "libguile/dynwind.h" |
5dbc6c06 | 35 | #include "libguile/hashtab.h" |
6b72ac1d | 36 | |
a0599745 | 37 | #include "libguile/fports.h" |
95b88819 GH |
38 | |
39 | #ifdef HAVE_STRING_H | |
40 | #include <string.h> | |
41 | #endif | |
0f2d19dd JB |
42 | #ifdef HAVE_UNISTD_H |
43 | #include <unistd.h> | |
0f2d19dd | 44 | #endif |
b8b17bfd MV |
45 | #ifdef HAVE_IO_H |
46 | #include <io.h> | |
47 | #endif | |
f47a5239 | 48 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e JB |
49 | #include <sys/stat.h> |
50 | #endif | |
0f2d19dd | 51 | |
cb63cf9e | 52 | #include <errno.h> |
8ab3d8a0 | 53 | #include <sys/types.h> |
e145dd02 | 54 | |
a0599745 | 55 | #include "libguile/iselect.h" |
edb810bb SJ |
56 | |
57 | /* Some defines for Windows (native port, not Cygwin). */ | |
82893676 MG |
58 | #ifdef __MINGW32__ |
59 | # include <sys/stat.h> | |
60 | # include <winsock2.h> | |
82893676 | 61 | #endif /* __MINGW32__ */ |
cb63cf9e | 62 | |
634aa8de LC |
63 | #include <full-write.h> |
64 | ||
8ab3d8a0 KR |
65 | /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize |
66 | already, but have this code here in case that wasn't so in past versions, | |
67 | or perhaps to help other minimal DOS environments. | |
68 | ||
69 | gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which | |
70 | might be possibilities if we've got other systems without ftruncate. */ | |
71 | ||
72 | #if HAVE_CHSIZE && ! HAVE_FTRUNCATE | |
73 | # define ftruncate(fd, size) chsize (fd, size) | |
74 | #undef HAVE_FTRUNCATE | |
75 | #define HAVE_FTRUNCATE 1 | |
76 | #endif | |
77 | ||
78 | #if SIZEOF_OFF_T == SIZEOF_INT | |
79 | #define OFF_T_MAX INT_MAX | |
80 | #define OFF_T_MIN INT_MIN | |
81 | #elif SIZEOF_OFF_T == SIZEOF_LONG | |
82 | #define OFF_T_MAX LONG_MAX | |
83 | #define OFF_T_MIN LONG_MIN | |
84 | #elif SIZEOF_OFF_T == SIZEOF_LONG_LONG | |
85 | #define OFF_T_MAX LONG_LONG_MAX | |
86 | #define OFF_T_MIN LONG_LONG_MIN | |
87 | #else | |
88 | #error Oops, unknown OFF_T size | |
89 | #endif | |
a98bddfd | 90 | |
92c2555f | 91 | scm_t_bits scm_tc16_fport; |
a98bddfd DH |
92 | |
93 | ||
19b27fa2 | 94 | /* default buffer size, used if the O/S won't supply a value. */ |
1be6b49c | 95 | static const size_t default_buffer_size = 1024; |
19b27fa2 | 96 | |
cb63cf9e JB |
97 | /* create FPORT buffer with specified sizes (or -1 to use default size or |
98 | 0 for no buffer. */ | |
99 | static void | |
c014a02e | 100 | scm_fport_buffer_add (SCM port, long read_size, int write_size) |
c6c79933 | 101 | #define FUNC_NAME "scm_fport_buffer_add" |
e145dd02 | 102 | { |
92c2555f | 103 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
e145dd02 | 104 | |
cb63cf9e JB |
105 | if (read_size == -1 || write_size == -1) |
106 | { | |
1be6b49c | 107 | size_t default_size; |
f47a5239 | 108 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e | 109 | struct stat st; |
b8b17bfd | 110 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 111 | |
19b27fa2 GH |
112 | default_size = (fstat (fp->fdes, &st) == -1) ? default_buffer_size |
113 | : st.st_blksize; | |
cb63cf9e | 114 | #else |
19b27fa2 | 115 | default_size = default_buffer_size; |
cb63cf9e JB |
116 | #endif |
117 | if (read_size == -1) | |
118 | read_size = default_size; | |
119 | if (write_size == -1) | |
120 | write_size = default_size; | |
121 | } | |
0f2d19dd | 122 | |
f5f2dcff | 123 | if (SCM_INPUT_PORT_P (port) && read_size > 0) |
cb63cf9e | 124 | { |
4c9419ac | 125 | pt->read_buf = scm_gc_malloc (read_size, "port buffer"); |
cb63cf9e JB |
126 | pt->read_pos = pt->read_end = pt->read_buf; |
127 | pt->read_buf_size = read_size; | |
128 | } | |
129 | else | |
130 | { | |
840ae05d | 131 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; |
cb63cf9e JB |
132 | pt->read_buf_size = 1; |
133 | } | |
1717856b | 134 | |
f5f2dcff | 135 | if (SCM_OUTPUT_PORT_P (port) && write_size > 0) |
cb63cf9e | 136 | { |
4c9419ac | 137 | pt->write_buf = scm_gc_malloc (write_size, "port buffer"); |
cb63cf9e JB |
138 | pt->write_pos = pt->write_buf; |
139 | pt->write_buf_size = write_size; | |
140 | } | |
141 | else | |
142 | { | |
143 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
144 | pt->write_buf_size = 1; | |
145 | } | |
146 | ||
147 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
148 | if (read_size > 0 || write_size > 0) | |
54778cd3 | 149 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0); |
cb63cf9e | 150 | else |
54778cd3 | 151 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUF0); |
7a6f1ffa | 152 | } |
c6c79933 | 153 | #undef FUNC_NAME |
7a6f1ffa | 154 | |
a1ec6916 | 155 | SCM_DEFINE (scm_setvbuf, "setvbuf", 2, 1, 0, |
1bbd0b84 | 156 | (SCM port, SCM mode, SCM size), |
fc0d72d4 MD |
157 | "Set the buffering mode for @var{port}. @var{mode} can be:\n" |
158 | "@table @code\n" | |
159 | "@item _IONBF\n" | |
160 | "non-buffered\n" | |
161 | "@item _IOLBF\n" | |
162 | "line buffered\n" | |
163 | "@item _IOFBF\n" | |
164 | "block buffered, using a newly allocated buffer of @var{size} bytes.\n" | |
165 | "If @var{size} is omitted, a default size will be used.\n" | |
2c1ae20e | 166 | "@end table") |
1bbd0b84 | 167 | #define FUNC_NAME s_scm_setvbuf |
7a6f1ffa | 168 | { |
1be6b49c | 169 | int cmode; |
c014a02e | 170 | long csize; |
92c2555f | 171 | scm_t_port *pt; |
7a6f1ffa | 172 | |
78446828 MV |
173 | port = SCM_COERCE_OUTPORT (port); |
174 | ||
3b3b36dd | 175 | SCM_VALIDATE_OPFPORT (1,port); |
a55c2b68 | 176 | cmode = scm_to_int (mode); |
d3639214 | 177 | if (cmode != _IONBF && cmode != _IOFBF && cmode != _IOLBF) |
1bbd0b84 | 178 | scm_out_of_range (FUNC_NAME, mode); |
d3639214 GH |
179 | |
180 | if (cmode == _IOLBF) | |
181 | { | |
54778cd3 | 182 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUFLINE); |
d3639214 GH |
183 | cmode = _IOFBF; |
184 | } | |
185 | else | |
186 | { | |
2b829bbb | 187 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~(scm_t_bits)SCM_BUFLINE); |
d3639214 GH |
188 | } |
189 | ||
7a6f1ffa | 190 | if (SCM_UNBNDP (size)) |
cb63cf9e JB |
191 | { |
192 | if (cmode == _IOFBF) | |
193 | csize = -1; | |
194 | else | |
195 | csize = 0; | |
196 | } | |
7a6f1ffa GH |
197 | else |
198 | { | |
a55c2b68 | 199 | csize = scm_to_int (size); |
cb63cf9e | 200 | if (csize < 0 || (cmode == _IONBF && csize > 0)) |
1bbd0b84 | 201 | scm_out_of_range (FUNC_NAME, size); |
7a6f1ffa | 202 | } |
d3639214 | 203 | |
cb63cf9e | 204 | pt = SCM_PTAB_ENTRY (port); |
7a6f1ffa | 205 | |
4c9419ac MV |
206 | /* silently discards buffered and put-back chars. */ |
207 | if (pt->read_buf == pt->putback_buf) | |
208 | { | |
209 | pt->read_buf = pt->saved_read_buf; | |
210 | pt->read_pos = pt->saved_read_pos; | |
211 | pt->read_end = pt->saved_read_end; | |
212 | pt->read_buf_size = pt->saved_read_buf_size; | |
213 | } | |
cb63cf9e | 214 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 215 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 216 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac | 217 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
7a6f1ffa | 218 | |
cb63cf9e JB |
219 | scm_fport_buffer_add (port, csize, csize); |
220 | return SCM_UNSPECIFIED; | |
0f2d19dd | 221 | } |
1bbd0b84 | 222 | #undef FUNC_NAME |
0f2d19dd | 223 | |
eadd48de | 224 | /* Move ports with the specified file descriptor to new descriptors, |
387d418c | 225 | * resetting the revealed count to 0. |
0f2d19dd | 226 | */ |
ee834df4 LC |
227 | static void |
228 | scm_i_evict_port (void *closure, SCM port) | |
0f2d19dd | 229 | { |
5dbc6c06 | 230 | int fd = * (int*) closure; |
0f2d19dd | 231 | |
5dbc6c06 | 232 | if (SCM_FPORTP (port)) |
eadd48de | 233 | { |
5dbc6c06 | 234 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 235 | |
5dbc6c06 | 236 | if (fp->fdes == fd) |
eadd48de | 237 | { |
5dbc6c06 HWN |
238 | fp->fdes = dup (fd); |
239 | if (fp->fdes == -1) | |
240 | scm_syserror ("scm_evict_ports"); | |
241 | scm_set_port_revealed_x (port, scm_from_int (0)); | |
eadd48de GH |
242 | } |
243 | } | |
5dbc6c06 HWN |
244 | } |
245 | ||
246 | void | |
247 | scm_evict_ports (int fd) | |
248 | { | |
ee834df4 | 249 | scm_c_port_for_each (scm_i_evict_port, (void *) &fd); |
eadd48de | 250 | } |
0f2d19dd | 251 | |
efa40607 DH |
252 | |
253 | SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0, | |
254 | (SCM obj), | |
2069af38 | 255 | "Determine whether @var{obj} is a port that is related to a file.") |
efa40607 DH |
256 | #define FUNC_NAME s_scm_file_port_p |
257 | { | |
7888309b | 258 | return scm_from_bool (SCM_FPORTP (obj)); |
efa40607 DH |
259 | } |
260 | #undef FUNC_NAME | |
261 | ||
262 | ||
0f2d19dd JB |
263 | /* scm_open_file |
264 | * Return a new port open on a given file. | |
265 | * | |
266 | * The mode string must match the pattern: [rwa+]** which | |
267 | * is interpreted in the usual unix way. | |
268 | * | |
269 | * Return the new port. | |
270 | */ | |
3b3b36dd | 271 | SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0, |
1e6808ea MG |
272 | (SCM filename, SCM mode), |
273 | "Open the file whose name is @var{filename}, and return a port\n" | |
fc0d72d4 | 274 | "representing that file. The attributes of the port are\n" |
1e6808ea MG |
275 | "determined by the @var{mode} string. The way in which this is\n" |
276 | "interpreted is similar to C stdio. The first character must be\n" | |
277 | "one of the following:\n" | |
fc0d72d4 MD |
278 | "@table @samp\n" |
279 | "@item r\n" | |
280 | "Open an existing file for input.\n" | |
281 | "@item w\n" | |
282 | "Open a file for output, creating it if it doesn't already exist\n" | |
283 | "or removing its contents if it does.\n" | |
284 | "@item a\n" | |
1e6808ea MG |
285 | "Open a file for output, creating it if it doesn't already\n" |
286 | "exist. All writes to the port will go to the end of the file.\n" | |
fc0d72d4 MD |
287 | "The \"append mode\" can be turned off while the port is in use\n" |
288 | "@pxref{Ports and File Descriptors, fcntl}\n" | |
1e6808ea MG |
289 | "@end table\n" |
290 | "The following additional characters can be appended:\n" | |
fc0d72d4 | 291 | "@table @samp\n" |
fc9c5d06 HWN |
292 | "@item b\n" |
293 | "Open the underlying file in binary mode, if supported by the operating system. " | |
fc0d72d4 MD |
294 | "@item +\n" |
295 | "Open the port for both input and output. E.g., @code{r+}: open\n" | |
296 | "an existing file for both input and output.\n" | |
297 | "@item 0\n" | |
1e6808ea MG |
298 | "Create an \"unbuffered\" port. In this case input and output\n" |
299 | "operations are passed directly to the underlying port\n" | |
300 | "implementation without additional buffering. This is likely to\n" | |
301 | "slow down I/O operations. The buffering mode can be changed\n" | |
302 | "while a port is in use @pxref{Ports and File Descriptors,\n" | |
303 | "setvbuf}\n" | |
fc0d72d4 MD |
304 | "@item l\n" |
305 | "Add line-buffering to the port. The port output buffer will be\n" | |
306 | "automatically flushed whenever a newline character is written.\n" | |
1e6808ea MG |
307 | "@end table\n" |
308 | "In theory we could create read/write ports which were buffered\n" | |
309 | "in one direction only. However this isn't included in the\n" | |
310 | "current interfaces. If a file cannot be opened with the access\n" | |
311 | "requested, @code{open-file} throws an exception.") | |
1bbd0b84 | 312 | #define FUNC_NAME s_scm_open_file |
0f2d19dd | 313 | { |
19639113 | 314 | SCM port; |
cb63cf9e JB |
315 | int fdes; |
316 | int flags = 0; | |
19639113 | 317 | char *file; |
1e6808ea | 318 | char *md; |
cb63cf9e | 319 | char *ptr; |
19639113 | 320 | |
661ae7ab | 321 | scm_dynwind_begin (0); |
19639113 | 322 | |
7f9994d9 | 323 | file = scm_to_locale_string (filename); |
661ae7ab | 324 | scm_dynwind_free (file); |
7f9994d9 MV |
325 | |
326 | md = scm_to_locale_string (mode); | |
661ae7ab | 327 | scm_dynwind_free (md); |
19639113 | 328 | |
1e6808ea | 329 | switch (*md) |
0f2d19dd | 330 | { |
cb63cf9e JB |
331 | case 'r': |
332 | flags |= O_RDONLY; | |
333 | break; | |
334 | case 'w': | |
335 | flags |= O_WRONLY | O_CREAT | O_TRUNC; | |
336 | break; | |
337 | case 'a': | |
338 | flags |= O_WRONLY | O_CREAT | O_APPEND; | |
339 | break; | |
340 | default: | |
1e6808ea | 341 | scm_out_of_range (FUNC_NAME, mode); |
0f2d19dd | 342 | } |
1e6808ea | 343 | ptr = md + 1; |
cb63cf9e | 344 | while (*ptr != '\0') |
e145dd02 | 345 | { |
cb63cf9e JB |
346 | switch (*ptr) |
347 | { | |
348 | case '+': | |
349 | flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR; | |
350 | break; | |
9f561420 GH |
351 | case 'b': |
352 | #if defined (O_BINARY) | |
353 | flags |= O_BINARY; | |
354 | #endif | |
355 | break; | |
cb63cf9e | 356 | case '0': /* unbuffered: handled later. */ |
d3639214 | 357 | case 'l': /* line buffered: handled during output. */ |
cb63cf9e JB |
358 | break; |
359 | default: | |
1e6808ea | 360 | scm_out_of_range (FUNC_NAME, mode); |
cb63cf9e JB |
361 | } |
362 | ptr++; | |
e145dd02 | 363 | } |
8ab3d8a0 | 364 | SCM_SYSCALL (fdes = open_or_open64 (file, flags, 0666)); |
cb63cf9e | 365 | if (fdes == -1) |
e145dd02 | 366 | { |
cb63cf9e JB |
367 | int en = errno; |
368 | ||
5d2d2ffc | 369 | SCM_SYSERROR_MSG ("~A: ~S", |
fd08c236 | 370 | scm_cons (scm_strerror (scm_from_int (en)), |
5d2d2ffc | 371 | scm_cons (filename, SCM_EOL)), en); |
0f2d19dd | 372 | } |
d617ee18 | 373 | port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode), filename); |
7f9994d9 | 374 | |
661ae7ab | 375 | scm_dynwind_end (); |
7f9994d9 | 376 | |
0f2d19dd JB |
377 | return port; |
378 | } | |
1bbd0b84 | 379 | #undef FUNC_NAME |
0f2d19dd | 380 | |
e145dd02 | 381 | \f |
82893676 MG |
382 | #ifdef __MINGW32__ |
383 | /* | |
384 | * Try getting the appropiate file flags for a given file descriptor | |
385 | * under Windows. This incorporates some fancy operations because Windows | |
386 | * differentiates between file, pipe and socket descriptors. | |
387 | */ | |
388 | #ifndef O_ACCMODE | |
389 | # define O_ACCMODE 0x0003 | |
390 | #endif | |
391 | ||
392 | static int getflags (int fdes) | |
393 | { | |
394 | int flags = 0; | |
395 | struct stat buf; | |
396 | int error, optlen = sizeof (int); | |
397 | ||
398 | /* Is this a socket ? */ | |
399 | if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0) | |
400 | flags = O_RDWR; | |
401 | /* Maybe a regular file ? */ | |
402 | else if (fstat (fdes, &buf) < 0) | |
403 | flags = -1; | |
404 | else | |
405 | { | |
406 | /* Or an anonymous pipe handle ? */ | |
b8b17bfd | 407 | if (buf.st_mode & _S_IFIFO) |
8f99e3f3 SJ |
408 | flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0, |
409 | NULL, NULL, NULL) ? O_RDONLY : O_WRONLY; | |
82893676 | 410 | /* stdin ? */ |
b8b17bfd | 411 | else if (fdes == fileno (stdin) && isatty (fdes)) |
82893676 MG |
412 | flags = O_RDONLY; |
413 | /* stdout / stderr ? */ | |
b8b17bfd MV |
414 | else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) && |
415 | isatty (fdes)) | |
82893676 MG |
416 | flags = O_WRONLY; |
417 | else | |
418 | flags = buf.st_mode; | |
419 | } | |
420 | return flags; | |
421 | } | |
422 | #endif /* __MINGW32__ */ | |
423 | ||
cb63cf9e | 424 | /* Building Guile ports from a file descriptor. */ |
e145dd02 | 425 | |
cb63cf9e | 426 | /* Build a Scheme port from an open file descriptor `fdes'. |
a089567e JB |
427 | MODE indicates whether FILE is open for reading or writing; it uses |
428 | the same notation as open-file's second argument. | |
19b27fa2 GH |
429 | NAME is a string to be used as the port's filename. |
430 | */ | |
a089567e | 431 | SCM |
d617ee18 | 432 | scm_i_fdes_to_port (int fdes, long mode_bits, SCM name) |
19b27fa2 | 433 | #define FUNC_NAME "scm_fdes_to_port" |
a089567e | 434 | { |
a089567e | 435 | SCM port; |
92c2555f | 436 | scm_t_port *pt; |
19b27fa2 GH |
437 | int flags; |
438 | ||
439 | /* test that fdes is valid. */ | |
82893676 MG |
440 | #ifdef __MINGW32__ |
441 | flags = getflags (fdes); | |
442 | #else | |
19b27fa2 | 443 | flags = fcntl (fdes, F_GETFL, 0); |
82893676 | 444 | #endif |
19b27fa2 GH |
445 | if (flags == -1) |
446 | SCM_SYSERROR; | |
447 | flags &= O_ACCMODE; | |
448 | if (flags != O_RDWR | |
449 | && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG)) | |
450 | || (flags != O_RDONLY && (mode_bits & SCM_RDNG)))) | |
451 | { | |
452 | SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL); | |
453 | } | |
a089567e | 454 | |
9de87eea | 455 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
da220f27 HWN |
456 | |
457 | port = scm_new_port_table_entry (scm_tc16_fport); | |
458 | SCM_SET_CELL_TYPE(port, scm_tc16_fport | mode_bits); | |
459 | pt = SCM_PTAB_ENTRY(port); | |
a089567e | 460 | { |
92c2555f | 461 | scm_t_fport *fp |
4c9419ac | 462 | = (scm_t_fport *) scm_gc_malloc (sizeof (scm_t_fport), "file port"); |
c6c79933 | 463 | |
cb63cf9e | 464 | fp->fdes = fdes; |
0de97b83 | 465 | pt->rw_random = SCM_FDES_RANDOM_P (fdes); |
cb63cf9e JB |
466 | SCM_SETSTREAM (port, fp); |
467 | if (mode_bits & SCM_BUF0) | |
468 | scm_fport_buffer_add (port, 0, 0); | |
469 | else | |
470 | scm_fport_buffer_add (port, -1, -1); | |
a089567e | 471 | } |
b24b5e13 | 472 | SCM_SET_FILENAME (port, name); |
9de87eea | 473 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
e145dd02 JB |
474 | return port; |
475 | } | |
19b27fa2 | 476 | #undef FUNC_NAME |
e145dd02 | 477 | |
d617ee18 MV |
478 | SCM |
479 | scm_fdes_to_port (int fdes, char *mode, SCM name) | |
480 | { | |
481 | return scm_i_fdes_to_port (fdes, scm_mode_bits (mode), name); | |
482 | } | |
483 | ||
affc96b5 | 484 | /* Return a lower bound on the number of bytes available for input. */ |
cb63cf9e | 485 | static int |
affc96b5 | 486 | fport_input_waiting (SCM port) |
e145dd02 | 487 | { |
cb63cf9e | 488 | #ifdef HAVE_SELECT |
23f2b9a3 | 489 | int fdes = SCM_FSTREAM (port)->fdes; |
cb63cf9e JB |
490 | struct timeval timeout; |
491 | SELECT_TYPE read_set; | |
492 | SELECT_TYPE write_set; | |
493 | SELECT_TYPE except_set; | |
494 | ||
495 | FD_ZERO (&read_set); | |
496 | FD_ZERO (&write_set); | |
497 | FD_ZERO (&except_set); | |
498 | ||
499 | FD_SET (fdes, &read_set); | |
500 | ||
501 | timeout.tv_sec = 0; | |
502 | timeout.tv_usec = 0; | |
503 | ||
504 | if (select (SELECT_SET_SIZE, | |
505 | &read_set, &write_set, &except_set, &timeout) | |
506 | < 0) | |
affc96b5 GH |
507 | scm_syserror ("fport_input_waiting"); |
508 | return FD_ISSET (fdes, &read_set) ? 1 : 0; | |
23f2b9a3 KR |
509 | |
510 | #elif HAVE_IOCTL && defined (FIONREAD) | |
511 | /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD | |
512 | (for use with winsock ioctlsocket()) but not ioctl(). */ | |
513 | int fdes = SCM_FSTREAM (port)->fdes; | |
cb63cf9e JB |
514 | int remir; |
515 | ioctl(fdes, FIONREAD, &remir); | |
516 | return remir; | |
23f2b9a3 | 517 | |
cb63cf9e | 518 | #else |
affc96b5 | 519 | scm_misc_error ("fport_input_waiting", |
cb63cf9e JB |
520 | "Not fully implemented on this platform", |
521 | SCM_EOL); | |
522 | #endif | |
a089567e JB |
523 | } |
524 | ||
cb63cf9e | 525 | \f |
0f2d19dd | 526 | static int |
e81d98ec | 527 | fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 528 | { |
b3ec3c64 MD |
529 | scm_puts ("#<", port); |
530 | scm_print_port_mode (exp, port); | |
531 | if (SCM_OPFPORTP (exp)) | |
0f2d19dd | 532 | { |
b3ec3c64 | 533 | int fdes; |
b24b5e13 | 534 | SCM name = SCM_FILENAME (exp); |
cc95e00a | 535 | if (scm_is_string (name) || scm_is_symbol (name)) |
b24b5e13 DH |
536 | scm_display (name, port); |
537 | else | |
538 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); | |
b3ec3c64 MD |
539 | scm_putc (' ', port); |
540 | fdes = (SCM_FSTREAM (exp))->fdes; | |
541 | ||
82893676 | 542 | #ifdef HAVE_TTYNAME |
b3ec3c64 | 543 | if (isatty (fdes)) |
eb372585 | 544 | scm_display (scm_ttyname (exp), port); |
b3ec3c64 | 545 | else |
82893676 | 546 | #endif /* HAVE_TTYNAME */ |
b3ec3c64 | 547 | scm_intprint (fdes, 10, port); |
0f2d19dd JB |
548 | } |
549 | else | |
550 | { | |
b3ec3c64 MD |
551 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); |
552 | scm_putc (' ', port); | |
0345e278 | 553 | scm_uintprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port); |
0f2d19dd | 554 | } |
b3ec3c64 MD |
555 | scm_putc ('>', port); |
556 | return 1; | |
0f2d19dd JB |
557 | } |
558 | ||
2e945bcc | 559 | #ifndef __MINGW32__ |
cb63cf9e JB |
560 | /* thread-local block for input on fport's fdes. */ |
561 | static void | |
562 | fport_wait_for_input (SCM port) | |
3cb988bd | 563 | { |
cb63cf9e | 564 | int fdes = SCM_FSTREAM (port)->fdes; |
3cb988bd | 565 | |
affc96b5 | 566 | if (!fport_input_waiting (port)) |
8122b543 | 567 | { |
cb63cf9e JB |
568 | int n; |
569 | SELECT_TYPE readfds; | |
570 | int flags = fcntl (fdes, F_GETFL); | |
571 | ||
572 | if (flags == -1) | |
573 | scm_syserror ("scm_fdes_wait_for_input"); | |
574 | if (!(flags & O_NONBLOCK)) | |
575 | do | |
576 | { | |
577 | FD_ZERO (&readfds); | |
578 | FD_SET (fdes, &readfds); | |
9de87eea | 579 | n = scm_std_select (fdes + 1, &readfds, NULL, NULL, NULL); |
cb63cf9e JB |
580 | } |
581 | while (n == -1 && errno == EINTR); | |
8122b543 | 582 | } |
3cb988bd | 583 | } |
2e945bcc | 584 | #endif /* !__MINGW32__ */ |
0f2d19dd | 585 | |
affc96b5 | 586 | static void fport_flush (SCM port); |
0f2d19dd | 587 | |
c2da2648 GH |
588 | /* fill a port's read-buffer with a single read. returns the first |
589 | char or EOF if end of file. */ | |
0f2d19dd | 590 | static int |
affc96b5 | 591 | fport_fill_input (SCM port) |
0f2d19dd | 592 | { |
c014a02e | 593 | long count; |
92c2555f MV |
594 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
595 | scm_t_fport *fp = SCM_FSTREAM (port); | |
cb63cf9e | 596 | |
2e945bcc | 597 | #ifndef __MINGW32__ |
cb63cf9e | 598 | fport_wait_for_input (port); |
2e945bcc | 599 | #endif /* !__MINGW32__ */ |
cb63cf9e JB |
600 | SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size)); |
601 | if (count == -1) | |
affc96b5 | 602 | scm_syserror ("fport_fill_input"); |
cb63cf9e JB |
603 | if (count == 0) |
604 | return EOF; | |
605 | else | |
606 | { | |
5c070ca7 | 607 | pt->read_pos = pt->read_buf; |
cb63cf9e | 608 | pt->read_end = pt->read_buf + count; |
5c070ca7 | 609 | return *pt->read_buf; |
cb63cf9e | 610 | } |
0f2d19dd JB |
611 | } |
612 | ||
8ab3d8a0 KR |
613 | static off_t_or_off64_t |
614 | fport_seek_or_seek64 (SCM port, off_t_or_off64_t offset, int whence) | |
0f2d19dd | 615 | { |
92c2555f MV |
616 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
617 | scm_t_fport *fp = SCM_FSTREAM (port); | |
8ab3d8a0 KR |
618 | off_t_or_off64_t rv; |
619 | off_t_or_off64_t result; | |
7dcb364d GH |
620 | |
621 | if (pt->rw_active == SCM_PORT_WRITE) | |
622 | { | |
623 | if (offset != 0 || whence != SEEK_CUR) | |
624 | { | |
625 | fport_flush (port); | |
8ab3d8a0 | 626 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
627 | } |
628 | else | |
629 | { | |
630 | /* read current position without disturbing the buffer. */ | |
8ab3d8a0 | 631 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
632 | result = rv + (pt->write_pos - pt->write_buf); |
633 | } | |
634 | } | |
635 | else if (pt->rw_active == SCM_PORT_READ) | |
636 | { | |
637 | if (offset != 0 || whence != SEEK_CUR) | |
638 | { | |
639 | /* could expand to avoid a second seek. */ | |
640 | scm_end_input (port); | |
8ab3d8a0 | 641 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
642 | } |
643 | else | |
644 | { | |
645 | /* read current position without disturbing the buffer | |
646 | (particularly the unread-char buffer). */ | |
8ab3d8a0 | 647 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
648 | result = rv - (pt->read_end - pt->read_pos); |
649 | ||
650 | if (pt->read_buf == pt->putback_buf) | |
651 | result -= pt->saved_read_end - pt->saved_read_pos; | |
652 | } | |
653 | } | |
654 | else /* SCM_PORT_NEITHER */ | |
655 | { | |
8ab3d8a0 | 656 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d | 657 | } |
cb8dfa3f | 658 | |
7dcb364d | 659 | if (rv == -1) |
affc96b5 | 660 | scm_syserror ("fport_seek"); |
7dcb364d | 661 | |
cb8dfa3f | 662 | return result; |
0f2d19dd JB |
663 | } |
664 | ||
8ab3d8a0 KR |
665 | /* If we've got largefile and off_t isn't already off64_t then |
666 | fport_seek_or_seek64 needs a range checking wrapper to be fport_seek in | |
667 | the port descriptor. | |
668 | ||
669 | Otherwise if no largefile, or off_t is the same as off64_t (which is the | |
670 | case on NetBSD apparently), then fport_seek_or_seek64 is right to be | |
671 | fport_seek already. */ | |
672 | ||
d05bcb2e | 673 | #if GUILE_USE_64_CALLS && HAVE_STAT64 && SIZEOF_OFF_T != SIZEOF_OFF64_T |
8ab3d8a0 KR |
674 | static off_t |
675 | fport_seek (SCM port, off_t offset, int whence) | |
676 | { | |
677 | off64_t rv = fport_seek_or_seek64 (port, (off64_t) offset, whence); | |
678 | if (rv > OFF_T_MAX || rv < OFF_T_MIN) | |
679 | { | |
680 | errno = EOVERFLOW; | |
681 | scm_syserror ("fport_seek"); | |
682 | } | |
683 | return (off_t) rv; | |
684 | ||
685 | } | |
686 | #else | |
687 | #define fport_seek fport_seek_or_seek64 | |
688 | #endif | |
689 | ||
690 | /* `how' has been validated and is one of SEEK_SET, SEEK_CUR or SEEK_END */ | |
691 | SCM | |
692 | scm_i_fport_seek (SCM port, SCM offset, int how) | |
693 | { | |
694 | return scm_from_off_t_or_off64_t | |
695 | (fport_seek_or_seek64 (port, scm_to_off_t_or_off64_t (offset), how)); | |
696 | } | |
697 | ||
840ae05d | 698 | static void |
affc96b5 | 699 | fport_truncate (SCM port, off_t length) |
840ae05d | 700 | { |
92c2555f | 701 | scm_t_fport *fp = SCM_FSTREAM (port); |
840ae05d JB |
702 | |
703 | if (ftruncate (fp->fdes, length) == -1) | |
704 | scm_syserror ("ftruncate"); | |
705 | } | |
706 | ||
8ab3d8a0 KR |
707 | int |
708 | scm_i_fport_truncate (SCM port, SCM length) | |
709 | { | |
710 | scm_t_fport *fp = SCM_FSTREAM (port); | |
711 | return ftruncate_or_ftruncate64 (fp->fdes, scm_to_off_t_or_off64_t (length)); | |
712 | } | |
713 | ||
0c6d2191 GH |
714 | /* helper for fport_write: try to write data, using multiple system |
715 | calls if required. */ | |
716 | #define FUNC_NAME "write_all" | |
717 | static void write_all (SCM port, const void *data, size_t remaining) | |
718 | { | |
719 | int fdes = SCM_FSTREAM (port)->fdes; | |
720 | ||
721 | while (remaining > 0) | |
722 | { | |
82893676 | 723 | size_t done; |
0c6d2191 GH |
724 | |
725 | SCM_SYSCALL (done = write (fdes, data, remaining)); | |
726 | ||
727 | if (done == -1) | |
728 | SCM_SYSERROR; | |
729 | remaining -= done; | |
730 | data = ((const char *) data) + done; | |
731 | } | |
732 | } | |
733 | #undef FUNC_NAME | |
734 | ||
31703ab8 | 735 | static void |
8aa011a1 | 736 | fport_write (SCM port, const void *data, size_t size) |
31703ab8 | 737 | { |
0c6d2191 | 738 | /* this procedure tries to minimize the number of writes/flushes. */ |
92c2555f | 739 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
31703ab8 | 740 | |
0c6d2191 GH |
741 | if (pt->write_buf == &pt->shortbuf |
742 | || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size)) | |
31703ab8 | 743 | { |
0c6d2191 GH |
744 | /* "unbuffered" port, or |
745 | port with empty buffer and data won't fit in buffer. */ | |
746 | write_all (port, data, size); | |
747 | return; | |
31703ab8 | 748 | } |
d3639214 | 749 | |
0c6d2191 GH |
750 | { |
751 | off_t space = pt->write_end - pt->write_pos; | |
752 | ||
753 | if (size <= space) | |
754 | { | |
755 | /* data fits in buffer. */ | |
756 | memcpy (pt->write_pos, data, size); | |
757 | pt->write_pos += size; | |
758 | if (pt->write_pos == pt->write_end) | |
759 | { | |
affc96b5 | 760 | fport_flush (port); |
0c6d2191 GH |
761 | /* we can skip the line-buffering check if nothing's buffered. */ |
762 | return; | |
763 | } | |
764 | } | |
765 | else | |
766 | { | |
767 | memcpy (pt->write_pos, data, space); | |
768 | pt->write_pos = pt->write_end; | |
769 | fport_flush (port); | |
770 | { | |
771 | const void *ptr = ((const char *) data) + space; | |
772 | size_t remaining = size - space; | |
773 | ||
774 | if (size >= pt->write_buf_size) | |
775 | { | |
776 | write_all (port, ptr, remaining); | |
777 | return; | |
778 | } | |
779 | else | |
780 | { | |
781 | memcpy (pt->write_pos, ptr, remaining); | |
782 | pt->write_pos += remaining; | |
783 | } | |
31703ab8 | 784 | } |
0c6d2191 | 785 | } |
31703ab8 | 786 | |
0c6d2191 GH |
787 | /* handle line buffering. */ |
788 | if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size)) | |
789 | fport_flush (port); | |
790 | } | |
31703ab8 GH |
791 | } |
792 | ||
793 | /* becomes 1 when process is exiting: normal exception handling won't | |
794 | work by this time. */ | |
04a98cff | 795 | extern int scm_i_terminating; |
0f2d19dd | 796 | |
cb63cf9e | 797 | static void |
affc96b5 | 798 | fport_flush (SCM port) |
0f2d19dd | 799 | { |
92c2555f MV |
800 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
801 | scm_t_fport *fp = SCM_FSTREAM (port); | |
6f760c1d | 802 | unsigned char *ptr = pt->write_buf; |
c014a02e ML |
803 | long init_size = pt->write_pos - pt->write_buf; |
804 | long remaining = init_size; | |
0f2d19dd | 805 | |
cb63cf9e JB |
806 | while (remaining > 0) |
807 | { | |
c014a02e | 808 | long count; |
cb63cf9e JB |
809 | |
810 | SCM_SYSCALL (count = write (fp->fdes, ptr, remaining)); | |
811 | if (count < 0) | |
812 | { | |
813 | /* error. assume nothing was written this call, but | |
814 | fix up the buffer for any previous successful writes. */ | |
c014a02e | 815 | long done = init_size - remaining; |
cb63cf9e JB |
816 | |
817 | if (done > 0) | |
818 | { | |
819 | int i; | |
820 | ||
821 | for (i = 0; i < remaining; i++) | |
822 | { | |
823 | *(pt->write_buf + i) = *(pt->write_buf + done + i); | |
824 | } | |
825 | pt->write_pos = pt->write_buf + remaining; | |
826 | } | |
04a98cff | 827 | if (scm_i_terminating) |
cb63cf9e JB |
828 | { |
829 | const char *msg = "Error: could not flush file-descriptor "; | |
830 | char buf[11]; | |
831 | ||
634aa8de | 832 | full_write (2, msg, strlen (msg)); |
cb63cf9e | 833 | sprintf (buf, "%d\n", fp->fdes); |
634aa8de | 834 | full_write (2, buf, strlen (buf)); |
cb63cf9e JB |
835 | |
836 | count = remaining; | |
837 | } | |
6b72ac1d GH |
838 | else if (scm_gc_running_p) |
839 | { | |
840 | /* silently ignore the error. scm_error would abort if we | |
841 | called it now. */ | |
842 | count = remaining; | |
843 | } | |
844 | else | |
845 | scm_syserror ("fport_flush"); | |
cb63cf9e JB |
846 | } |
847 | ptr += count; | |
848 | remaining -= count; | |
849 | } | |
850 | pt->write_pos = pt->write_buf; | |
61e452ba | 851 | pt->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
852 | } |
853 | ||
283a1a0e | 854 | /* clear the read buffer and adjust the file position for unread bytes. */ |
840ae05d | 855 | static void |
affc96b5 | 856 | fport_end_input (SCM port, int offset) |
840ae05d | 857 | { |
92c2555f MV |
858 | scm_t_fport *fp = SCM_FSTREAM (port); |
859 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
283a1a0e GH |
860 | |
861 | offset += pt->read_end - pt->read_pos; | |
840ae05d | 862 | |
840ae05d JB |
863 | if (offset > 0) |
864 | { | |
865 | pt->read_pos = pt->read_end; | |
866 | /* will throw error if unread-char used at beginning of file | |
867 | then attempting to write. seems correct. */ | |
868 | if (lseek (fp->fdes, -offset, SEEK_CUR) == -1) | |
affc96b5 | 869 | scm_syserror ("fport_end_input"); |
840ae05d | 870 | } |
61e452ba | 871 | pt->rw_active = SCM_PORT_NEITHER; |
8f29fbd0 JB |
872 | } |
873 | ||
6a2c4c81 | 874 | static int |
affc96b5 | 875 | fport_close (SCM port) |
6a2c4c81 | 876 | { |
92c2555f MV |
877 | scm_t_fport *fp = SCM_FSTREAM (port); |
878 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
cb63cf9e | 879 | int rv; |
840ae05d | 880 | |
affc96b5 | 881 | fport_flush (port); |
cb63cf9e JB |
882 | SCM_SYSCALL (rv = close (fp->fdes)); |
883 | if (rv == -1 && errno != EBADF) | |
6b72ac1d GH |
884 | { |
885 | if (scm_gc_running_p) | |
886 | /* silently ignore the error. scm_error would abort if we | |
887 | called it now. */ | |
888 | ; | |
889 | else | |
890 | scm_syserror ("fport_close"); | |
891 | } | |
6c951427 GH |
892 | if (pt->read_buf == pt->putback_buf) |
893 | pt->read_buf = pt->saved_read_buf; | |
cb63cf9e | 894 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 895 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 896 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac MV |
897 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
898 | scm_gc_free (fp, sizeof (*fp), "file port"); | |
cb63cf9e | 899 | return rv; |
6a2c4c81 JB |
900 | } |
901 | ||
1be6b49c | 902 | static size_t |
affc96b5 | 903 | fport_free (SCM port) |
b3ec3c64 | 904 | { |
affc96b5 | 905 | fport_close (port); |
b3ec3c64 MD |
906 | return 0; |
907 | } | |
908 | ||
92c2555f | 909 | static scm_t_bits |
b3ec3c64 MD |
910 | scm_make_fptob () |
911 | { | |
92c2555f | 912 | scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write); |
a98bddfd | 913 | |
affc96b5 | 914 | scm_set_port_free (tc, fport_free); |
e841c3e0 | 915 | scm_set_port_print (tc, fport_print); |
affc96b5 GH |
916 | scm_set_port_flush (tc, fport_flush); |
917 | scm_set_port_end_input (tc, fport_end_input); | |
918 | scm_set_port_close (tc, fport_close); | |
919 | scm_set_port_seek (tc, fport_seek); | |
920 | scm_set_port_truncate (tc, fport_truncate); | |
921 | scm_set_port_input_waiting (tc, fport_input_waiting); | |
a98bddfd DH |
922 | |
923 | return tc; | |
b3ec3c64 | 924 | } |
0f2d19dd | 925 | |
0f2d19dd JB |
926 | void |
927 | scm_init_fports () | |
0f2d19dd | 928 | { |
a98bddfd DH |
929 | scm_tc16_fport = scm_make_fptob (); |
930 | ||
e11e83f3 MV |
931 | scm_c_define ("_IOFBF", scm_from_int (_IOFBF)); |
932 | scm_c_define ("_IOLBF", scm_from_int (_IOLBF)); | |
933 | scm_c_define ("_IONBF", scm_from_int (_IONBF)); | |
a98bddfd | 934 | |
a98bddfd | 935 | #include "libguile/fports.x" |
0f2d19dd | 936 | } |
89e00824 ML |
937 | |
938 | /* | |
939 | Local Variables: | |
940 | c-file-style: "gnu" | |
941 | End: | |
942 | */ |