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 MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
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 | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd | 19 | \f |
8ab3d8a0 KR |
20 | #define _LARGEFILE64_SOURCE /* ask for stat64 etc */ |
21 | ||
dbb605f5 | 22 | #ifdef HAVE_CONFIG_H |
85286595 RB |
23 | # include <config.h> |
24 | #endif | |
0f2d19dd JB |
25 | |
26 | #include <stdio.h> | |
cb63cf9e | 27 | #include <fcntl.h> |
a0599745 MD |
28 | #include "libguile/_scm.h" |
29 | #include "libguile/strings.h" | |
a0599745 | 30 | #include "libguile/validate.h" |
6b72ac1d | 31 | #include "libguile/gc.h" |
eb372585 | 32 | #include "libguile/posix.h" |
7f9994d9 | 33 | #include "libguile/dynwind.h" |
5dbc6c06 | 34 | #include "libguile/hashtab.h" |
6b72ac1d | 35 | |
a0599745 | 36 | #include "libguile/fports.h" |
95b88819 GH |
37 | |
38 | #ifdef HAVE_STRING_H | |
39 | #include <string.h> | |
40 | #endif | |
0f2d19dd JB |
41 | #ifdef HAVE_UNISTD_H |
42 | #include <unistd.h> | |
0f2d19dd | 43 | #endif |
b8b17bfd MV |
44 | #ifdef HAVE_IO_H |
45 | #include <io.h> | |
46 | #endif | |
f47a5239 | 47 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e JB |
48 | #include <sys/stat.h> |
49 | #endif | |
0f2d19dd | 50 | |
cb63cf9e | 51 | #include <errno.h> |
8ab3d8a0 | 52 | #include <sys/types.h> |
e145dd02 | 53 | |
a0599745 | 54 | #include "libguile/iselect.h" |
edb810bb SJ |
55 | |
56 | /* Some defines for Windows (native port, not Cygwin). */ | |
82893676 MG |
57 | #ifdef __MINGW32__ |
58 | # include <sys/stat.h> | |
59 | # include <winsock2.h> | |
82893676 | 60 | #endif /* __MINGW32__ */ |
cb63cf9e | 61 | |
634aa8de LC |
62 | #include <full-write.h> |
63 | ||
8ab3d8a0 KR |
64 | /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize |
65 | already, but have this code here in case that wasn't so in past versions, | |
66 | or perhaps to help other minimal DOS environments. | |
67 | ||
68 | gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which | |
69 | might be possibilities if we've got other systems without ftruncate. */ | |
70 | ||
71 | #if HAVE_CHSIZE && ! HAVE_FTRUNCATE | |
72 | # define ftruncate(fd, size) chsize (fd, size) | |
73 | #undef HAVE_FTRUNCATE | |
74 | #define HAVE_FTRUNCATE 1 | |
75 | #endif | |
76 | ||
77 | #if SIZEOF_OFF_T == SIZEOF_INT | |
78 | #define OFF_T_MAX INT_MAX | |
79 | #define OFF_T_MIN INT_MIN | |
80 | #elif SIZEOF_OFF_T == SIZEOF_LONG | |
81 | #define OFF_T_MAX LONG_MAX | |
82 | #define OFF_T_MIN LONG_MIN | |
83 | #elif SIZEOF_OFF_T == SIZEOF_LONG_LONG | |
84 | #define OFF_T_MAX LONG_LONG_MAX | |
85 | #define OFF_T_MIN LONG_LONG_MIN | |
86 | #else | |
87 | #error Oops, unknown OFF_T size | |
88 | #endif | |
a98bddfd | 89 | |
92c2555f | 90 | scm_t_bits scm_tc16_fport; |
a98bddfd DH |
91 | |
92 | ||
19b27fa2 | 93 | /* default buffer size, used if the O/S won't supply a value. */ |
1be6b49c | 94 | static const size_t default_buffer_size = 1024; |
19b27fa2 | 95 | |
cb63cf9e JB |
96 | /* create FPORT buffer with specified sizes (or -1 to use default size or |
97 | 0 for no buffer. */ | |
98 | static void | |
c014a02e | 99 | scm_fport_buffer_add (SCM port, long read_size, int write_size) |
c6c79933 | 100 | #define FUNC_NAME "scm_fport_buffer_add" |
e145dd02 | 101 | { |
92c2555f | 102 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
e145dd02 | 103 | |
cb63cf9e JB |
104 | if (read_size == -1 || write_size == -1) |
105 | { | |
1be6b49c | 106 | size_t default_size; |
f47a5239 | 107 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e | 108 | struct stat st; |
b8b17bfd | 109 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 110 | |
19b27fa2 GH |
111 | default_size = (fstat (fp->fdes, &st) == -1) ? default_buffer_size |
112 | : st.st_blksize; | |
cb63cf9e | 113 | #else |
19b27fa2 | 114 | default_size = default_buffer_size; |
cb63cf9e JB |
115 | #endif |
116 | if (read_size == -1) | |
117 | read_size = default_size; | |
118 | if (write_size == -1) | |
119 | write_size = default_size; | |
120 | } | |
0f2d19dd | 121 | |
f5f2dcff | 122 | if (SCM_INPUT_PORT_P (port) && read_size > 0) |
cb63cf9e | 123 | { |
92d8fd32 | 124 | pt->read_buf = scm_gc_malloc_pointerless (read_size, "port buffer"); |
cb63cf9e JB |
125 | pt->read_pos = pt->read_end = pt->read_buf; |
126 | pt->read_buf_size = read_size; | |
127 | } | |
128 | else | |
129 | { | |
840ae05d | 130 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; |
cb63cf9e JB |
131 | pt->read_buf_size = 1; |
132 | } | |
1717856b | 133 | |
f5f2dcff | 134 | if (SCM_OUTPUT_PORT_P (port) && write_size > 0) |
cb63cf9e | 135 | { |
92d8fd32 | 136 | pt->write_buf = scm_gc_malloc_pointerless (write_size, "port buffer"); |
cb63cf9e JB |
137 | pt->write_pos = pt->write_buf; |
138 | pt->write_buf_size = write_size; | |
139 | } | |
140 | else | |
141 | { | |
142 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
143 | pt->write_buf_size = 1; | |
144 | } | |
145 | ||
146 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
147 | if (read_size > 0 || write_size > 0) | |
54778cd3 | 148 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0); |
cb63cf9e | 149 | else |
54778cd3 | 150 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUF0); |
7a6f1ffa | 151 | } |
c6c79933 | 152 | #undef FUNC_NAME |
7a6f1ffa | 153 | |
a1ec6916 | 154 | SCM_DEFINE (scm_setvbuf, "setvbuf", 2, 1, 0, |
1bbd0b84 | 155 | (SCM port, SCM mode, SCM size), |
fc0d72d4 MD |
156 | "Set the buffering mode for @var{port}. @var{mode} can be:\n" |
157 | "@table @code\n" | |
158 | "@item _IONBF\n" | |
159 | "non-buffered\n" | |
160 | "@item _IOLBF\n" | |
161 | "line buffered\n" | |
162 | "@item _IOFBF\n" | |
163 | "block buffered, using a newly allocated buffer of @var{size} bytes.\n" | |
164 | "If @var{size} is omitted, a default size will be used.\n" | |
2c1ae20e | 165 | "@end table") |
1bbd0b84 | 166 | #define FUNC_NAME s_scm_setvbuf |
7a6f1ffa | 167 | { |
1be6b49c | 168 | int cmode; |
c014a02e | 169 | long csize; |
92c2555f | 170 | scm_t_port *pt; |
7a6f1ffa | 171 | |
78446828 MV |
172 | port = SCM_COERCE_OUTPORT (port); |
173 | ||
3b3b36dd | 174 | SCM_VALIDATE_OPFPORT (1,port); |
a55c2b68 | 175 | cmode = scm_to_int (mode); |
d3639214 | 176 | if (cmode != _IONBF && cmode != _IOFBF && cmode != _IOLBF) |
1bbd0b84 | 177 | scm_out_of_range (FUNC_NAME, mode); |
d3639214 GH |
178 | |
179 | if (cmode == _IOLBF) | |
180 | { | |
54778cd3 | 181 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUFLINE); |
d3639214 GH |
182 | cmode = _IOFBF; |
183 | } | |
184 | else | |
185 | { | |
2b829bbb | 186 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~(scm_t_bits)SCM_BUFLINE); |
d3639214 GH |
187 | } |
188 | ||
7a6f1ffa | 189 | if (SCM_UNBNDP (size)) |
cb63cf9e JB |
190 | { |
191 | if (cmode == _IOFBF) | |
192 | csize = -1; | |
193 | else | |
194 | csize = 0; | |
195 | } | |
7a6f1ffa GH |
196 | else |
197 | { | |
a55c2b68 | 198 | csize = scm_to_int (size); |
cb63cf9e | 199 | if (csize < 0 || (cmode == _IONBF && csize > 0)) |
1bbd0b84 | 200 | scm_out_of_range (FUNC_NAME, size); |
7a6f1ffa | 201 | } |
d3639214 | 202 | |
cb63cf9e | 203 | pt = SCM_PTAB_ENTRY (port); |
7a6f1ffa | 204 | |
4c9419ac MV |
205 | /* silently discards buffered and put-back chars. */ |
206 | if (pt->read_buf == pt->putback_buf) | |
207 | { | |
208 | pt->read_buf = pt->saved_read_buf; | |
209 | pt->read_pos = pt->saved_read_pos; | |
210 | pt->read_end = pt->saved_read_end; | |
211 | pt->read_buf_size = pt->saved_read_buf_size; | |
212 | } | |
cb63cf9e | 213 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 214 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 215 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac | 216 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
7a6f1ffa | 217 | |
cb63cf9e JB |
218 | scm_fport_buffer_add (port, csize, csize); |
219 | return SCM_UNSPECIFIED; | |
0f2d19dd | 220 | } |
1bbd0b84 | 221 | #undef FUNC_NAME |
0f2d19dd | 222 | |
eadd48de | 223 | /* Move ports with the specified file descriptor to new descriptors, |
387d418c | 224 | * resetting the revealed count to 0. |
0f2d19dd | 225 | */ |
ee834df4 LC |
226 | static void |
227 | scm_i_evict_port (void *closure, SCM port) | |
0f2d19dd | 228 | { |
5dbc6c06 | 229 | int fd = * (int*) closure; |
0f2d19dd | 230 | |
5dbc6c06 | 231 | if (SCM_FPORTP (port)) |
eadd48de | 232 | { |
e9d8bc25 LC |
233 | scm_t_port *p; |
234 | scm_t_fport *fp; | |
235 | ||
236 | /* XXX: In some cases, we can encounter a port with no associated ptab | |
237 | entry. */ | |
238 | p = SCM_PTAB_ENTRY (port); | |
239 | fp = (p != NULL) ? (scm_t_fport *) p->stream : NULL; | |
cb63cf9e | 240 | |
e9d8bc25 | 241 | if ((fp != NULL) && (fp->fdes == fd)) |
eadd48de | 242 | { |
5dbc6c06 HWN |
243 | fp->fdes = dup (fd); |
244 | if (fp->fdes == -1) | |
245 | scm_syserror ("scm_evict_ports"); | |
246 | scm_set_port_revealed_x (port, scm_from_int (0)); | |
eadd48de GH |
247 | } |
248 | } | |
5dbc6c06 HWN |
249 | } |
250 | ||
251 | void | |
252 | scm_evict_ports (int fd) | |
253 | { | |
ee834df4 | 254 | scm_c_port_for_each (scm_i_evict_port, (void *) &fd); |
eadd48de | 255 | } |
0f2d19dd | 256 | |
efa40607 DH |
257 | |
258 | SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0, | |
259 | (SCM obj), | |
2069af38 | 260 | "Determine whether @var{obj} is a port that is related to a file.") |
efa40607 DH |
261 | #define FUNC_NAME s_scm_file_port_p |
262 | { | |
7888309b | 263 | return scm_from_bool (SCM_FPORTP (obj)); |
efa40607 DH |
264 | } |
265 | #undef FUNC_NAME | |
266 | ||
267 | ||
0f2d19dd JB |
268 | /* scm_open_file |
269 | * Return a new port open on a given file. | |
270 | * | |
271 | * The mode string must match the pattern: [rwa+]** which | |
272 | * is interpreted in the usual unix way. | |
273 | * | |
274 | * Return the new port. | |
275 | */ | |
3b3b36dd | 276 | SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0, |
1e6808ea MG |
277 | (SCM filename, SCM mode), |
278 | "Open the file whose name is @var{filename}, and return a port\n" | |
fc0d72d4 | 279 | "representing that file. The attributes of the port are\n" |
1e6808ea MG |
280 | "determined by the @var{mode} string. The way in which this is\n" |
281 | "interpreted is similar to C stdio. The first character must be\n" | |
282 | "one of the following:\n" | |
fc0d72d4 MD |
283 | "@table @samp\n" |
284 | "@item r\n" | |
285 | "Open an existing file for input.\n" | |
286 | "@item w\n" | |
287 | "Open a file for output, creating it if it doesn't already exist\n" | |
288 | "or removing its contents if it does.\n" | |
289 | "@item a\n" | |
1e6808ea MG |
290 | "Open a file for output, creating it if it doesn't already\n" |
291 | "exist. All writes to the port will go to the end of the file.\n" | |
fc0d72d4 MD |
292 | "The \"append mode\" can be turned off while the port is in use\n" |
293 | "@pxref{Ports and File Descriptors, fcntl}\n" | |
1e6808ea MG |
294 | "@end table\n" |
295 | "The following additional characters can be appended:\n" | |
fc0d72d4 | 296 | "@table @samp\n" |
fc9c5d06 HWN |
297 | "@item b\n" |
298 | "Open the underlying file in binary mode, if supported by the operating system. " | |
fc0d72d4 MD |
299 | "@item +\n" |
300 | "Open the port for both input and output. E.g., @code{r+}: open\n" | |
301 | "an existing file for both input and output.\n" | |
302 | "@item 0\n" | |
1e6808ea MG |
303 | "Create an \"unbuffered\" port. In this case input and output\n" |
304 | "operations are passed directly to the underlying port\n" | |
305 | "implementation without additional buffering. This is likely to\n" | |
306 | "slow down I/O operations. The buffering mode can be changed\n" | |
307 | "while a port is in use @pxref{Ports and File Descriptors,\n" | |
308 | "setvbuf}\n" | |
fc0d72d4 MD |
309 | "@item l\n" |
310 | "Add line-buffering to the port. The port output buffer will be\n" | |
311 | "automatically flushed whenever a newline character is written.\n" | |
1e6808ea MG |
312 | "@end table\n" |
313 | "In theory we could create read/write ports which were buffered\n" | |
314 | "in one direction only. However this isn't included in the\n" | |
315 | "current interfaces. If a file cannot be opened with the access\n" | |
316 | "requested, @code{open-file} throws an exception.") | |
1bbd0b84 | 317 | #define FUNC_NAME s_scm_open_file |
0f2d19dd | 318 | { |
19639113 | 319 | SCM port; |
cb63cf9e JB |
320 | int fdes; |
321 | int flags = 0; | |
19639113 | 322 | char *file; |
1e6808ea | 323 | char *md; |
cb63cf9e | 324 | char *ptr; |
19639113 | 325 | |
661ae7ab | 326 | scm_dynwind_begin (0); |
19639113 | 327 | |
7f9994d9 | 328 | file = scm_to_locale_string (filename); |
661ae7ab | 329 | scm_dynwind_free (file); |
7f9994d9 MV |
330 | |
331 | md = scm_to_locale_string (mode); | |
661ae7ab | 332 | scm_dynwind_free (md); |
19639113 | 333 | |
1e6808ea | 334 | switch (*md) |
0f2d19dd | 335 | { |
cb63cf9e JB |
336 | case 'r': |
337 | flags |= O_RDONLY; | |
338 | break; | |
339 | case 'w': | |
340 | flags |= O_WRONLY | O_CREAT | O_TRUNC; | |
341 | break; | |
342 | case 'a': | |
343 | flags |= O_WRONLY | O_CREAT | O_APPEND; | |
344 | break; | |
345 | default: | |
1e6808ea | 346 | scm_out_of_range (FUNC_NAME, mode); |
0f2d19dd | 347 | } |
1e6808ea | 348 | ptr = md + 1; |
cb63cf9e | 349 | while (*ptr != '\0') |
e145dd02 | 350 | { |
cb63cf9e JB |
351 | switch (*ptr) |
352 | { | |
353 | case '+': | |
354 | flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR; | |
355 | break; | |
9f561420 GH |
356 | case 'b': |
357 | #if defined (O_BINARY) | |
358 | flags |= O_BINARY; | |
359 | #endif | |
360 | break; | |
cb63cf9e | 361 | case '0': /* unbuffered: handled later. */ |
d3639214 | 362 | case 'l': /* line buffered: handled during output. */ |
cb63cf9e JB |
363 | break; |
364 | default: | |
1e6808ea | 365 | scm_out_of_range (FUNC_NAME, mode); |
cb63cf9e JB |
366 | } |
367 | ptr++; | |
e145dd02 | 368 | } |
8ab3d8a0 | 369 | SCM_SYSCALL (fdes = open_or_open64 (file, flags, 0666)); |
cb63cf9e | 370 | if (fdes == -1) |
e145dd02 | 371 | { |
cb63cf9e JB |
372 | int en = errno; |
373 | ||
5d2d2ffc | 374 | SCM_SYSERROR_MSG ("~A: ~S", |
fd08c236 | 375 | scm_cons (scm_strerror (scm_from_int (en)), |
5d2d2ffc | 376 | scm_cons (filename, SCM_EOL)), en); |
0f2d19dd | 377 | } |
d617ee18 | 378 | port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode), filename); |
7f9994d9 | 379 | |
661ae7ab | 380 | scm_dynwind_end (); |
7f9994d9 | 381 | |
0f2d19dd JB |
382 | return port; |
383 | } | |
1bbd0b84 | 384 | #undef FUNC_NAME |
0f2d19dd | 385 | |
e145dd02 | 386 | \f |
82893676 MG |
387 | #ifdef __MINGW32__ |
388 | /* | |
389 | * Try getting the appropiate file flags for a given file descriptor | |
390 | * under Windows. This incorporates some fancy operations because Windows | |
391 | * differentiates between file, pipe and socket descriptors. | |
392 | */ | |
393 | #ifndef O_ACCMODE | |
394 | # define O_ACCMODE 0x0003 | |
395 | #endif | |
396 | ||
397 | static int getflags (int fdes) | |
398 | { | |
399 | int flags = 0; | |
400 | struct stat buf; | |
401 | int error, optlen = sizeof (int); | |
402 | ||
403 | /* Is this a socket ? */ | |
404 | if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0) | |
405 | flags = O_RDWR; | |
406 | /* Maybe a regular file ? */ | |
407 | else if (fstat (fdes, &buf) < 0) | |
408 | flags = -1; | |
409 | else | |
410 | { | |
411 | /* Or an anonymous pipe handle ? */ | |
b8b17bfd | 412 | if (buf.st_mode & _S_IFIFO) |
8f99e3f3 SJ |
413 | flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0, |
414 | NULL, NULL, NULL) ? O_RDONLY : O_WRONLY; | |
82893676 | 415 | /* stdin ? */ |
b8b17bfd | 416 | else if (fdes == fileno (stdin) && isatty (fdes)) |
82893676 MG |
417 | flags = O_RDONLY; |
418 | /* stdout / stderr ? */ | |
b8b17bfd MV |
419 | else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) && |
420 | isatty (fdes)) | |
82893676 MG |
421 | flags = O_WRONLY; |
422 | else | |
423 | flags = buf.st_mode; | |
424 | } | |
425 | return flags; | |
426 | } | |
427 | #endif /* __MINGW32__ */ | |
428 | ||
cb63cf9e | 429 | /* Building Guile ports from a file descriptor. */ |
e145dd02 | 430 | |
cb63cf9e | 431 | /* Build a Scheme port from an open file descriptor `fdes'. |
a089567e JB |
432 | MODE indicates whether FILE is open for reading or writing; it uses |
433 | the same notation as open-file's second argument. | |
19b27fa2 GH |
434 | NAME is a string to be used as the port's filename. |
435 | */ | |
a089567e | 436 | SCM |
d617ee18 | 437 | scm_i_fdes_to_port (int fdes, long mode_bits, SCM name) |
19b27fa2 | 438 | #define FUNC_NAME "scm_fdes_to_port" |
a089567e | 439 | { |
a089567e | 440 | SCM port; |
92c2555f | 441 | scm_t_port *pt; |
19b27fa2 GH |
442 | int flags; |
443 | ||
444 | /* test that fdes is valid. */ | |
82893676 MG |
445 | #ifdef __MINGW32__ |
446 | flags = getflags (fdes); | |
447 | #else | |
19b27fa2 | 448 | flags = fcntl (fdes, F_GETFL, 0); |
82893676 | 449 | #endif |
19b27fa2 GH |
450 | if (flags == -1) |
451 | SCM_SYSERROR; | |
452 | flags &= O_ACCMODE; | |
453 | if (flags != O_RDWR | |
454 | && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG)) | |
455 | || (flags != O_RDONLY && (mode_bits & SCM_RDNG)))) | |
456 | { | |
457 | SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL); | |
458 | } | |
a089567e | 459 | |
9de87eea | 460 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
da220f27 HWN |
461 | |
462 | port = scm_new_port_table_entry (scm_tc16_fport); | |
463 | SCM_SET_CELL_TYPE(port, scm_tc16_fport | mode_bits); | |
464 | pt = SCM_PTAB_ENTRY(port); | |
a089567e | 465 | { |
92c2555f | 466 | scm_t_fport *fp |
92d8fd32 LC |
467 | = (scm_t_fport *) scm_gc_malloc_pointerless (sizeof (scm_t_fport), |
468 | "file port"); | |
c6c79933 | 469 | |
cb63cf9e | 470 | fp->fdes = fdes; |
0de97b83 | 471 | pt->rw_random = SCM_FDES_RANDOM_P (fdes); |
cb63cf9e JB |
472 | SCM_SETSTREAM (port, fp); |
473 | if (mode_bits & SCM_BUF0) | |
474 | scm_fport_buffer_add (port, 0, 0); | |
475 | else | |
476 | scm_fport_buffer_add (port, -1, -1); | |
a089567e | 477 | } |
b24b5e13 | 478 | SCM_SET_FILENAME (port, name); |
9de87eea | 479 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
e145dd02 JB |
480 | return port; |
481 | } | |
19b27fa2 | 482 | #undef FUNC_NAME |
e145dd02 | 483 | |
d617ee18 MV |
484 | SCM |
485 | scm_fdes_to_port (int fdes, char *mode, SCM name) | |
486 | { | |
487 | return scm_i_fdes_to_port (fdes, scm_mode_bits (mode), name); | |
488 | } | |
489 | ||
affc96b5 | 490 | /* Return a lower bound on the number of bytes available for input. */ |
cb63cf9e | 491 | static int |
affc96b5 | 492 | fport_input_waiting (SCM port) |
e145dd02 | 493 | { |
cb63cf9e | 494 | #ifdef HAVE_SELECT |
23f2b9a3 | 495 | int fdes = SCM_FSTREAM (port)->fdes; |
cb63cf9e JB |
496 | struct timeval timeout; |
497 | SELECT_TYPE read_set; | |
498 | SELECT_TYPE write_set; | |
499 | SELECT_TYPE except_set; | |
500 | ||
501 | FD_ZERO (&read_set); | |
502 | FD_ZERO (&write_set); | |
503 | FD_ZERO (&except_set); | |
504 | ||
505 | FD_SET (fdes, &read_set); | |
506 | ||
507 | timeout.tv_sec = 0; | |
508 | timeout.tv_usec = 0; | |
509 | ||
510 | if (select (SELECT_SET_SIZE, | |
511 | &read_set, &write_set, &except_set, &timeout) | |
512 | < 0) | |
affc96b5 GH |
513 | scm_syserror ("fport_input_waiting"); |
514 | return FD_ISSET (fdes, &read_set) ? 1 : 0; | |
23f2b9a3 KR |
515 | |
516 | #elif HAVE_IOCTL && defined (FIONREAD) | |
517 | /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD | |
518 | (for use with winsock ioctlsocket()) but not ioctl(). */ | |
519 | int fdes = SCM_FSTREAM (port)->fdes; | |
cb63cf9e JB |
520 | int remir; |
521 | ioctl(fdes, FIONREAD, &remir); | |
522 | return remir; | |
23f2b9a3 | 523 | |
cb63cf9e | 524 | #else |
affc96b5 | 525 | scm_misc_error ("fport_input_waiting", |
cb63cf9e JB |
526 | "Not fully implemented on this platform", |
527 | SCM_EOL); | |
528 | #endif | |
a089567e JB |
529 | } |
530 | ||
cb63cf9e | 531 | \f |
0f2d19dd | 532 | static int |
e81d98ec | 533 | fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 534 | { |
b3ec3c64 MD |
535 | scm_puts ("#<", port); |
536 | scm_print_port_mode (exp, port); | |
537 | if (SCM_OPFPORTP (exp)) | |
0f2d19dd | 538 | { |
b3ec3c64 | 539 | int fdes; |
b24b5e13 | 540 | SCM name = SCM_FILENAME (exp); |
cc95e00a | 541 | if (scm_is_string (name) || scm_is_symbol (name)) |
b24b5e13 DH |
542 | scm_display (name, port); |
543 | else | |
544 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); | |
b3ec3c64 MD |
545 | scm_putc (' ', port); |
546 | fdes = (SCM_FSTREAM (exp))->fdes; | |
547 | ||
82893676 | 548 | #ifdef HAVE_TTYNAME |
b3ec3c64 | 549 | if (isatty (fdes)) |
eb372585 | 550 | scm_display (scm_ttyname (exp), port); |
b3ec3c64 | 551 | else |
82893676 | 552 | #endif /* HAVE_TTYNAME */ |
b3ec3c64 | 553 | scm_intprint (fdes, 10, port); |
0f2d19dd JB |
554 | } |
555 | else | |
556 | { | |
b3ec3c64 MD |
557 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); |
558 | scm_putc (' ', port); | |
0345e278 | 559 | scm_uintprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port); |
0f2d19dd | 560 | } |
b3ec3c64 MD |
561 | scm_putc ('>', port); |
562 | return 1; | |
0f2d19dd JB |
563 | } |
564 | ||
2e945bcc | 565 | #ifndef __MINGW32__ |
cb63cf9e JB |
566 | /* thread-local block for input on fport's fdes. */ |
567 | static void | |
568 | fport_wait_for_input (SCM port) | |
3cb988bd | 569 | { |
cb63cf9e | 570 | int fdes = SCM_FSTREAM (port)->fdes; |
3cb988bd | 571 | |
affc96b5 | 572 | if (!fport_input_waiting (port)) |
8122b543 | 573 | { |
cb63cf9e JB |
574 | int n; |
575 | SELECT_TYPE readfds; | |
576 | int flags = fcntl (fdes, F_GETFL); | |
577 | ||
578 | if (flags == -1) | |
579 | scm_syserror ("scm_fdes_wait_for_input"); | |
580 | if (!(flags & O_NONBLOCK)) | |
581 | do | |
582 | { | |
583 | FD_ZERO (&readfds); | |
584 | FD_SET (fdes, &readfds); | |
9de87eea | 585 | n = scm_std_select (fdes + 1, &readfds, NULL, NULL, NULL); |
cb63cf9e JB |
586 | } |
587 | while (n == -1 && errno == EINTR); | |
8122b543 | 588 | } |
3cb988bd | 589 | } |
2e945bcc | 590 | #endif /* !__MINGW32__ */ |
0f2d19dd | 591 | |
affc96b5 | 592 | static void fport_flush (SCM port); |
0f2d19dd | 593 | |
c2da2648 GH |
594 | /* fill a port's read-buffer with a single read. returns the first |
595 | char or EOF if end of file. */ | |
0f2d19dd | 596 | static int |
affc96b5 | 597 | fport_fill_input (SCM port) |
0f2d19dd | 598 | { |
c014a02e | 599 | long count; |
92c2555f MV |
600 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
601 | scm_t_fport *fp = SCM_FSTREAM (port); | |
cb63cf9e | 602 | |
2e945bcc | 603 | #ifndef __MINGW32__ |
cb63cf9e | 604 | fport_wait_for_input (port); |
2e945bcc | 605 | #endif /* !__MINGW32__ */ |
cb63cf9e JB |
606 | SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size)); |
607 | if (count == -1) | |
affc96b5 | 608 | scm_syserror ("fport_fill_input"); |
cb63cf9e JB |
609 | if (count == 0) |
610 | return EOF; | |
611 | else | |
612 | { | |
5c070ca7 | 613 | pt->read_pos = pt->read_buf; |
cb63cf9e | 614 | pt->read_end = pt->read_buf + count; |
5c070ca7 | 615 | return *pt->read_buf; |
cb63cf9e | 616 | } |
0f2d19dd JB |
617 | } |
618 | ||
8ab3d8a0 KR |
619 | static off_t_or_off64_t |
620 | fport_seek_or_seek64 (SCM port, off_t_or_off64_t offset, int whence) | |
0f2d19dd | 621 | { |
92c2555f MV |
622 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
623 | scm_t_fport *fp = SCM_FSTREAM (port); | |
8ab3d8a0 KR |
624 | off_t_or_off64_t rv; |
625 | off_t_or_off64_t result; | |
7dcb364d GH |
626 | |
627 | if (pt->rw_active == SCM_PORT_WRITE) | |
628 | { | |
629 | if (offset != 0 || whence != SEEK_CUR) | |
630 | { | |
631 | fport_flush (port); | |
8ab3d8a0 | 632 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
633 | } |
634 | else | |
635 | { | |
636 | /* read current position without disturbing the buffer. */ | |
8ab3d8a0 | 637 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
638 | result = rv + (pt->write_pos - pt->write_buf); |
639 | } | |
640 | } | |
641 | else if (pt->rw_active == SCM_PORT_READ) | |
642 | { | |
643 | if (offset != 0 || whence != SEEK_CUR) | |
644 | { | |
645 | /* could expand to avoid a second seek. */ | |
646 | scm_end_input (port); | |
8ab3d8a0 | 647 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
648 | } |
649 | else | |
650 | { | |
651 | /* read current position without disturbing the buffer | |
652 | (particularly the unread-char buffer). */ | |
8ab3d8a0 | 653 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
654 | result = rv - (pt->read_end - pt->read_pos); |
655 | ||
656 | if (pt->read_buf == pt->putback_buf) | |
657 | result -= pt->saved_read_end - pt->saved_read_pos; | |
658 | } | |
659 | } | |
660 | else /* SCM_PORT_NEITHER */ | |
661 | { | |
8ab3d8a0 | 662 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d | 663 | } |
cb8dfa3f | 664 | |
7dcb364d | 665 | if (rv == -1) |
affc96b5 | 666 | scm_syserror ("fport_seek"); |
7dcb364d | 667 | |
cb8dfa3f | 668 | return result; |
0f2d19dd JB |
669 | } |
670 | ||
8ab3d8a0 KR |
671 | /* If we've got largefile and off_t isn't already off64_t then |
672 | fport_seek_or_seek64 needs a range checking wrapper to be fport_seek in | |
673 | the port descriptor. | |
674 | ||
675 | Otherwise if no largefile, or off_t is the same as off64_t (which is the | |
676 | case on NetBSD apparently), then fport_seek_or_seek64 is right to be | |
677 | fport_seek already. */ | |
678 | ||
d05bcb2e | 679 | #if GUILE_USE_64_CALLS && HAVE_STAT64 && SIZEOF_OFF_T != SIZEOF_OFF64_T |
8ab3d8a0 KR |
680 | static off_t |
681 | fport_seek (SCM port, off_t offset, int whence) | |
682 | { | |
683 | off64_t rv = fport_seek_or_seek64 (port, (off64_t) offset, whence); | |
684 | if (rv > OFF_T_MAX || rv < OFF_T_MIN) | |
685 | { | |
686 | errno = EOVERFLOW; | |
687 | scm_syserror ("fport_seek"); | |
688 | } | |
689 | return (off_t) rv; | |
690 | ||
691 | } | |
692 | #else | |
693 | #define fport_seek fport_seek_or_seek64 | |
694 | #endif | |
695 | ||
696 | /* `how' has been validated and is one of SEEK_SET, SEEK_CUR or SEEK_END */ | |
697 | SCM | |
698 | scm_i_fport_seek (SCM port, SCM offset, int how) | |
699 | { | |
700 | return scm_from_off_t_or_off64_t | |
701 | (fport_seek_or_seek64 (port, scm_to_off_t_or_off64_t (offset), how)); | |
702 | } | |
703 | ||
840ae05d | 704 | static void |
affc96b5 | 705 | fport_truncate (SCM port, off_t length) |
840ae05d | 706 | { |
92c2555f | 707 | scm_t_fport *fp = SCM_FSTREAM (port); |
840ae05d JB |
708 | |
709 | if (ftruncate (fp->fdes, length) == -1) | |
710 | scm_syserror ("ftruncate"); | |
711 | } | |
712 | ||
8ab3d8a0 KR |
713 | int |
714 | scm_i_fport_truncate (SCM port, SCM length) | |
715 | { | |
716 | scm_t_fport *fp = SCM_FSTREAM (port); | |
717 | return ftruncate_or_ftruncate64 (fp->fdes, scm_to_off_t_or_off64_t (length)); | |
718 | } | |
719 | ||
0c6d2191 GH |
720 | /* helper for fport_write: try to write data, using multiple system |
721 | calls if required. */ | |
722 | #define FUNC_NAME "write_all" | |
723 | static void write_all (SCM port, const void *data, size_t remaining) | |
724 | { | |
725 | int fdes = SCM_FSTREAM (port)->fdes; | |
726 | ||
727 | while (remaining > 0) | |
728 | { | |
82893676 | 729 | size_t done; |
0c6d2191 GH |
730 | |
731 | SCM_SYSCALL (done = write (fdes, data, remaining)); | |
732 | ||
733 | if (done == -1) | |
734 | SCM_SYSERROR; | |
735 | remaining -= done; | |
736 | data = ((const char *) data) + done; | |
737 | } | |
738 | } | |
739 | #undef FUNC_NAME | |
740 | ||
31703ab8 | 741 | static void |
8aa011a1 | 742 | fport_write (SCM port, const void *data, size_t size) |
31703ab8 | 743 | { |
0c6d2191 | 744 | /* this procedure tries to minimize the number of writes/flushes. */ |
92c2555f | 745 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
31703ab8 | 746 | |
0c6d2191 GH |
747 | if (pt->write_buf == &pt->shortbuf |
748 | || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size)) | |
31703ab8 | 749 | { |
0c6d2191 GH |
750 | /* "unbuffered" port, or |
751 | port with empty buffer and data won't fit in buffer. */ | |
752 | write_all (port, data, size); | |
753 | return; | |
31703ab8 | 754 | } |
d3639214 | 755 | |
0c6d2191 GH |
756 | { |
757 | off_t space = pt->write_end - pt->write_pos; | |
758 | ||
759 | if (size <= space) | |
760 | { | |
761 | /* data fits in buffer. */ | |
762 | memcpy (pt->write_pos, data, size); | |
763 | pt->write_pos += size; | |
764 | if (pt->write_pos == pt->write_end) | |
765 | { | |
affc96b5 | 766 | fport_flush (port); |
0c6d2191 GH |
767 | /* we can skip the line-buffering check if nothing's buffered. */ |
768 | return; | |
769 | } | |
770 | } | |
771 | else | |
772 | { | |
773 | memcpy (pt->write_pos, data, space); | |
774 | pt->write_pos = pt->write_end; | |
775 | fport_flush (port); | |
776 | { | |
777 | const void *ptr = ((const char *) data) + space; | |
778 | size_t remaining = size - space; | |
779 | ||
780 | if (size >= pt->write_buf_size) | |
781 | { | |
782 | write_all (port, ptr, remaining); | |
783 | return; | |
784 | } | |
785 | else | |
786 | { | |
787 | memcpy (pt->write_pos, ptr, remaining); | |
788 | pt->write_pos += remaining; | |
789 | } | |
31703ab8 | 790 | } |
0c6d2191 | 791 | } |
31703ab8 | 792 | |
0c6d2191 GH |
793 | /* handle line buffering. */ |
794 | if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size)) | |
795 | fport_flush (port); | |
796 | } | |
31703ab8 GH |
797 | } |
798 | ||
799 | /* becomes 1 when process is exiting: normal exception handling won't | |
800 | work by this time. */ | |
04a98cff | 801 | extern int scm_i_terminating; |
0f2d19dd | 802 | |
cb63cf9e | 803 | static void |
affc96b5 | 804 | fport_flush (SCM port) |
0f2d19dd | 805 | { |
92c2555f MV |
806 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
807 | scm_t_fport *fp = SCM_FSTREAM (port); | |
6f760c1d | 808 | unsigned char *ptr = pt->write_buf; |
c014a02e ML |
809 | long init_size = pt->write_pos - pt->write_buf; |
810 | long remaining = init_size; | |
0f2d19dd | 811 | |
cb63cf9e JB |
812 | while (remaining > 0) |
813 | { | |
c014a02e | 814 | long count; |
cb63cf9e JB |
815 | |
816 | SCM_SYSCALL (count = write (fp->fdes, ptr, remaining)); | |
817 | if (count < 0) | |
818 | { | |
819 | /* error. assume nothing was written this call, but | |
820 | fix up the buffer for any previous successful writes. */ | |
c014a02e | 821 | long done = init_size - remaining; |
cb63cf9e JB |
822 | |
823 | if (done > 0) | |
824 | { | |
825 | int i; | |
826 | ||
827 | for (i = 0; i < remaining; i++) | |
828 | { | |
829 | *(pt->write_buf + i) = *(pt->write_buf + done + i); | |
830 | } | |
831 | pt->write_pos = pt->write_buf + remaining; | |
832 | } | |
04a98cff | 833 | if (scm_i_terminating) |
cb63cf9e JB |
834 | { |
835 | const char *msg = "Error: could not flush file-descriptor "; | |
836 | char buf[11]; | |
837 | ||
634aa8de | 838 | full_write (2, msg, strlen (msg)); |
cb63cf9e | 839 | sprintf (buf, "%d\n", fp->fdes); |
634aa8de | 840 | full_write (2, buf, strlen (buf)); |
cb63cf9e JB |
841 | |
842 | count = remaining; | |
843 | } | |
6b72ac1d GH |
844 | else if (scm_gc_running_p) |
845 | { | |
846 | /* silently ignore the error. scm_error would abort if we | |
847 | called it now. */ | |
848 | count = remaining; | |
849 | } | |
850 | else | |
851 | scm_syserror ("fport_flush"); | |
cb63cf9e JB |
852 | } |
853 | ptr += count; | |
854 | remaining -= count; | |
855 | } | |
856 | pt->write_pos = pt->write_buf; | |
61e452ba | 857 | pt->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
858 | } |
859 | ||
283a1a0e | 860 | /* clear the read buffer and adjust the file position for unread bytes. */ |
840ae05d | 861 | static void |
affc96b5 | 862 | fport_end_input (SCM port, int offset) |
840ae05d | 863 | { |
92c2555f MV |
864 | scm_t_fport *fp = SCM_FSTREAM (port); |
865 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
283a1a0e GH |
866 | |
867 | offset += pt->read_end - pt->read_pos; | |
840ae05d | 868 | |
840ae05d JB |
869 | if (offset > 0) |
870 | { | |
871 | pt->read_pos = pt->read_end; | |
872 | /* will throw error if unread-char used at beginning of file | |
873 | then attempting to write. seems correct. */ | |
874 | if (lseek (fp->fdes, -offset, SEEK_CUR) == -1) | |
affc96b5 | 875 | scm_syserror ("fport_end_input"); |
840ae05d | 876 | } |
61e452ba | 877 | pt->rw_active = SCM_PORT_NEITHER; |
8f29fbd0 JB |
878 | } |
879 | ||
6a2c4c81 | 880 | static int |
affc96b5 | 881 | fport_close (SCM port) |
6a2c4c81 | 882 | { |
92c2555f MV |
883 | scm_t_fport *fp = SCM_FSTREAM (port); |
884 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
cb63cf9e | 885 | int rv; |
840ae05d | 886 | |
affc96b5 | 887 | fport_flush (port); |
cb63cf9e JB |
888 | SCM_SYSCALL (rv = close (fp->fdes)); |
889 | if (rv == -1 && errno != EBADF) | |
6b72ac1d GH |
890 | { |
891 | if (scm_gc_running_p) | |
892 | /* silently ignore the error. scm_error would abort if we | |
893 | called it now. */ | |
894 | ; | |
895 | else | |
896 | scm_syserror ("fport_close"); | |
897 | } | |
6c951427 GH |
898 | if (pt->read_buf == pt->putback_buf) |
899 | pt->read_buf = pt->saved_read_buf; | |
cb63cf9e | 900 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 901 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 902 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac MV |
903 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
904 | scm_gc_free (fp, sizeof (*fp), "file port"); | |
cb63cf9e | 905 | return rv; |
6a2c4c81 JB |
906 | } |
907 | ||
1be6b49c | 908 | static size_t |
affc96b5 | 909 | fport_free (SCM port) |
b3ec3c64 | 910 | { |
affc96b5 | 911 | fport_close (port); |
b3ec3c64 MD |
912 | return 0; |
913 | } | |
914 | ||
92c2555f | 915 | static scm_t_bits |
b3ec3c64 MD |
916 | scm_make_fptob () |
917 | { | |
92c2555f | 918 | scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write); |
a98bddfd | 919 | |
affc96b5 | 920 | scm_set_port_free (tc, fport_free); |
e841c3e0 | 921 | scm_set_port_print (tc, fport_print); |
affc96b5 GH |
922 | scm_set_port_flush (tc, fport_flush); |
923 | scm_set_port_end_input (tc, fport_end_input); | |
924 | scm_set_port_close (tc, fport_close); | |
925 | scm_set_port_seek (tc, fport_seek); | |
926 | scm_set_port_truncate (tc, fport_truncate); | |
927 | scm_set_port_input_waiting (tc, fport_input_waiting); | |
a98bddfd DH |
928 | |
929 | return tc; | |
b3ec3c64 | 930 | } |
0f2d19dd | 931 | |
0f2d19dd JB |
932 | void |
933 | scm_init_fports () | |
0f2d19dd | 934 | { |
a98bddfd DH |
935 | scm_tc16_fport = scm_make_fptob (); |
936 | ||
e11e83f3 MV |
937 | scm_c_define ("_IOFBF", scm_from_int (_IOFBF)); |
938 | scm_c_define ("_IOLBF", scm_from_int (_IOLBF)); | |
939 | scm_c_define ("_IONBF", scm_from_int (_IONBF)); | |
a98bddfd | 940 | |
a98bddfd | 941 | #include "libguile/fports.x" |
0f2d19dd | 942 | } |
89e00824 ML |
943 | |
944 | /* | |
945 | Local Variables: | |
946 | c-file-style: "gnu" | |
947 | End: | |
948 | */ |