Commit | Line | Data |
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2b829bbb | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2006 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 | ||
85286595 RB |
22 | #if HAVE_CONFIG_H |
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 | |
8ab3d8a0 KR |
62 | /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize |
63 | already, but have this code here in case that wasn't so in past versions, | |
64 | or perhaps to help other minimal DOS environments. | |
65 | ||
66 | gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which | |
67 | might be possibilities if we've got other systems without ftruncate. */ | |
68 | ||
69 | #if HAVE_CHSIZE && ! HAVE_FTRUNCATE | |
70 | # define ftruncate(fd, size) chsize (fd, size) | |
71 | #undef HAVE_FTRUNCATE | |
72 | #define HAVE_FTRUNCATE 1 | |
73 | #endif | |
74 | ||
75 | #if SIZEOF_OFF_T == SIZEOF_INT | |
76 | #define OFF_T_MAX INT_MAX | |
77 | #define OFF_T_MIN INT_MIN | |
78 | #elif SIZEOF_OFF_T == SIZEOF_LONG | |
79 | #define OFF_T_MAX LONG_MAX | |
80 | #define OFF_T_MIN LONG_MIN | |
81 | #elif SIZEOF_OFF_T == SIZEOF_LONG_LONG | |
82 | #define OFF_T_MAX LONG_LONG_MAX | |
83 | #define OFF_T_MIN LONG_LONG_MIN | |
84 | #else | |
85 | #error Oops, unknown OFF_T size | |
86 | #endif | |
a98bddfd | 87 | |
92c2555f | 88 | scm_t_bits scm_tc16_fport; |
a98bddfd DH |
89 | |
90 | ||
19b27fa2 | 91 | /* default buffer size, used if the O/S won't supply a value. */ |
1be6b49c | 92 | static const size_t default_buffer_size = 1024; |
19b27fa2 | 93 | |
cb63cf9e JB |
94 | /* create FPORT buffer with specified sizes (or -1 to use default size or |
95 | 0 for no buffer. */ | |
96 | static void | |
c014a02e | 97 | scm_fport_buffer_add (SCM port, long read_size, int write_size) |
c6c79933 | 98 | #define FUNC_NAME "scm_fport_buffer_add" |
e145dd02 | 99 | { |
92c2555f | 100 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
e145dd02 | 101 | |
cb63cf9e JB |
102 | if (read_size == -1 || write_size == -1) |
103 | { | |
1be6b49c | 104 | size_t default_size; |
f47a5239 | 105 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e | 106 | struct stat st; |
b8b17bfd | 107 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 108 | |
19b27fa2 GH |
109 | default_size = (fstat (fp->fdes, &st) == -1) ? default_buffer_size |
110 | : st.st_blksize; | |
cb63cf9e | 111 | #else |
19b27fa2 | 112 | default_size = default_buffer_size; |
cb63cf9e JB |
113 | #endif |
114 | if (read_size == -1) | |
115 | read_size = default_size; | |
116 | if (write_size == -1) | |
117 | write_size = default_size; | |
118 | } | |
0f2d19dd | 119 | |
f5f2dcff | 120 | if (SCM_INPUT_PORT_P (port) && read_size > 0) |
cb63cf9e | 121 | { |
4c9419ac | 122 | pt->read_buf = scm_gc_malloc (read_size, "port buffer"); |
cb63cf9e JB |
123 | pt->read_pos = pt->read_end = pt->read_buf; |
124 | pt->read_buf_size = read_size; | |
125 | } | |
126 | else | |
127 | { | |
840ae05d | 128 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; |
cb63cf9e JB |
129 | pt->read_buf_size = 1; |
130 | } | |
1717856b | 131 | |
f5f2dcff | 132 | if (SCM_OUTPUT_PORT_P (port) && write_size > 0) |
cb63cf9e | 133 | { |
4c9419ac | 134 | pt->write_buf = scm_gc_malloc (write_size, "port buffer"); |
cb63cf9e JB |
135 | pt->write_pos = pt->write_buf; |
136 | pt->write_buf_size = write_size; | |
137 | } | |
138 | else | |
139 | { | |
140 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
141 | pt->write_buf_size = 1; | |
142 | } | |
143 | ||
144 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
145 | if (read_size > 0 || write_size > 0) | |
54778cd3 | 146 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0); |
cb63cf9e | 147 | else |
54778cd3 | 148 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUF0); |
7a6f1ffa | 149 | } |
c6c79933 | 150 | #undef FUNC_NAME |
7a6f1ffa | 151 | |
a1ec6916 | 152 | SCM_DEFINE (scm_setvbuf, "setvbuf", 2, 1, 0, |
1bbd0b84 | 153 | (SCM port, SCM mode, SCM size), |
fc0d72d4 MD |
154 | "Set the buffering mode for @var{port}. @var{mode} can be:\n" |
155 | "@table @code\n" | |
156 | "@item _IONBF\n" | |
157 | "non-buffered\n" | |
158 | "@item _IOLBF\n" | |
159 | "line buffered\n" | |
160 | "@item _IOFBF\n" | |
161 | "block buffered, using a newly allocated buffer of @var{size} bytes.\n" | |
162 | "If @var{size} is omitted, a default size will be used.\n" | |
2c1ae20e | 163 | "@end table") |
1bbd0b84 | 164 | #define FUNC_NAME s_scm_setvbuf |
7a6f1ffa | 165 | { |
1be6b49c | 166 | int cmode; |
c014a02e | 167 | long csize; |
92c2555f | 168 | scm_t_port *pt; |
7a6f1ffa | 169 | |
78446828 MV |
170 | port = SCM_COERCE_OUTPORT (port); |
171 | ||
3b3b36dd | 172 | SCM_VALIDATE_OPFPORT (1,port); |
a55c2b68 | 173 | cmode = scm_to_int (mode); |
d3639214 | 174 | if (cmode != _IONBF && cmode != _IOFBF && cmode != _IOLBF) |
1bbd0b84 | 175 | scm_out_of_range (FUNC_NAME, mode); |
d3639214 GH |
176 | |
177 | if (cmode == _IOLBF) | |
178 | { | |
54778cd3 | 179 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUFLINE); |
d3639214 GH |
180 | cmode = _IOFBF; |
181 | } | |
182 | else | |
183 | { | |
2b829bbb | 184 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~(scm_t_bits)SCM_BUFLINE); |
d3639214 GH |
185 | } |
186 | ||
7a6f1ffa | 187 | if (SCM_UNBNDP (size)) |
cb63cf9e JB |
188 | { |
189 | if (cmode == _IOFBF) | |
190 | csize = -1; | |
191 | else | |
192 | csize = 0; | |
193 | } | |
7a6f1ffa GH |
194 | else |
195 | { | |
a55c2b68 | 196 | csize = scm_to_int (size); |
cb63cf9e | 197 | if (csize < 0 || (cmode == _IONBF && csize > 0)) |
1bbd0b84 | 198 | scm_out_of_range (FUNC_NAME, size); |
7a6f1ffa | 199 | } |
d3639214 | 200 | |
cb63cf9e | 201 | pt = SCM_PTAB_ENTRY (port); |
7a6f1ffa | 202 | |
4c9419ac MV |
203 | /* silently discards buffered and put-back chars. */ |
204 | if (pt->read_buf == pt->putback_buf) | |
205 | { | |
206 | pt->read_buf = pt->saved_read_buf; | |
207 | pt->read_pos = pt->saved_read_pos; | |
208 | pt->read_end = pt->saved_read_end; | |
209 | pt->read_buf_size = pt->saved_read_buf_size; | |
210 | } | |
cb63cf9e | 211 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 212 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 213 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac | 214 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
7a6f1ffa | 215 | |
cb63cf9e JB |
216 | scm_fport_buffer_add (port, csize, csize); |
217 | return SCM_UNSPECIFIED; | |
0f2d19dd | 218 | } |
1bbd0b84 | 219 | #undef FUNC_NAME |
0f2d19dd | 220 | |
eadd48de | 221 | /* Move ports with the specified file descriptor to new descriptors, |
387d418c | 222 | * resetting the revealed count to 0. |
0f2d19dd | 223 | */ |
5dbc6c06 HWN |
224 | static SCM |
225 | scm_i_evict_port (SCM handle, void *closure) | |
0f2d19dd | 226 | { |
5dbc6c06 HWN |
227 | int fd = * (int*) closure; |
228 | SCM port = SCM_CAR (handle); | |
0f2d19dd | 229 | |
5dbc6c06 | 230 | if (SCM_FPORTP (port)) |
eadd48de | 231 | { |
5dbc6c06 | 232 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 233 | |
5dbc6c06 | 234 | if (fp->fdes == fd) |
eadd48de | 235 | { |
5dbc6c06 HWN |
236 | fp->fdes = dup (fd); |
237 | if (fp->fdes == -1) | |
238 | scm_syserror ("scm_evict_ports"); | |
239 | scm_set_port_revealed_x (port, scm_from_int (0)); | |
eadd48de GH |
240 | } |
241 | } | |
b9ad392e | 242 | |
5dbc6c06 HWN |
243 | return handle; |
244 | } | |
245 | ||
246 | void | |
247 | scm_evict_ports (int fd) | |
248 | { | |
249 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); | |
250 | scm_internal_hash_for_each_handle (&scm_i_evict_port, | |
251 | (void*) &fd, | |
252 | scm_i_port_weak_hash); | |
9de87eea | 253 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
eadd48de | 254 | } |
0f2d19dd | 255 | |
efa40607 DH |
256 | |
257 | SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0, | |
258 | (SCM obj), | |
2069af38 | 259 | "Determine whether @var{obj} is a port that is related to a file.") |
efa40607 DH |
260 | #define FUNC_NAME s_scm_file_port_p |
261 | { | |
7888309b | 262 | return scm_from_bool (SCM_FPORTP (obj)); |
efa40607 DH |
263 | } |
264 | #undef FUNC_NAME | |
265 | ||
266 | ||
0f2d19dd JB |
267 | /* scm_open_file |
268 | * Return a new port open on a given file. | |
269 | * | |
270 | * The mode string must match the pattern: [rwa+]** which | |
271 | * is interpreted in the usual unix way. | |
272 | * | |
273 | * Return the new port. | |
274 | */ | |
3b3b36dd | 275 | SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0, |
1e6808ea MG |
276 | (SCM filename, SCM mode), |
277 | "Open the file whose name is @var{filename}, and return a port\n" | |
fc0d72d4 | 278 | "representing that file. The attributes of the port are\n" |
1e6808ea MG |
279 | "determined by the @var{mode} string. The way in which this is\n" |
280 | "interpreted is similar to C stdio. The first character must be\n" | |
281 | "one of the following:\n" | |
fc0d72d4 MD |
282 | "@table @samp\n" |
283 | "@item r\n" | |
284 | "Open an existing file for input.\n" | |
285 | "@item w\n" | |
286 | "Open a file for output, creating it if it doesn't already exist\n" | |
287 | "or removing its contents if it does.\n" | |
288 | "@item a\n" | |
1e6808ea MG |
289 | "Open a file for output, creating it if it doesn't already\n" |
290 | "exist. All writes to the port will go to the end of the file.\n" | |
fc0d72d4 MD |
291 | "The \"append mode\" can be turned off while the port is in use\n" |
292 | "@pxref{Ports and File Descriptors, fcntl}\n" | |
1e6808ea MG |
293 | "@end table\n" |
294 | "The following additional characters can be appended:\n" | |
fc0d72d4 | 295 | "@table @samp\n" |
fc9c5d06 HWN |
296 | "@item b\n" |
297 | "Open the underlying file in binary mode, if supported by the operating system. " | |
fc0d72d4 MD |
298 | "@item +\n" |
299 | "Open the port for both input and output. E.g., @code{r+}: open\n" | |
300 | "an existing file for both input and output.\n" | |
301 | "@item 0\n" | |
1e6808ea MG |
302 | "Create an \"unbuffered\" port. In this case input and output\n" |
303 | "operations are passed directly to the underlying port\n" | |
304 | "implementation without additional buffering. This is likely to\n" | |
305 | "slow down I/O operations. The buffering mode can be changed\n" | |
306 | "while a port is in use @pxref{Ports and File Descriptors,\n" | |
307 | "setvbuf}\n" | |
fc0d72d4 MD |
308 | "@item l\n" |
309 | "Add line-buffering to the port. The port output buffer will be\n" | |
310 | "automatically flushed whenever a newline character is written.\n" | |
1e6808ea MG |
311 | "@end table\n" |
312 | "In theory we could create read/write ports which were buffered\n" | |
313 | "in one direction only. However this isn't included in the\n" | |
314 | "current interfaces. If a file cannot be opened with the access\n" | |
315 | "requested, @code{open-file} throws an exception.") | |
1bbd0b84 | 316 | #define FUNC_NAME s_scm_open_file |
0f2d19dd | 317 | { |
19639113 | 318 | SCM port; |
cb63cf9e JB |
319 | int fdes; |
320 | int flags = 0; | |
19639113 | 321 | char *file; |
1e6808ea | 322 | char *md; |
cb63cf9e | 323 | char *ptr; |
19639113 | 324 | |
661ae7ab | 325 | scm_dynwind_begin (0); |
19639113 | 326 | |
7f9994d9 | 327 | file = scm_to_locale_string (filename); |
661ae7ab | 328 | scm_dynwind_free (file); |
7f9994d9 MV |
329 | |
330 | md = scm_to_locale_string (mode); | |
661ae7ab | 331 | scm_dynwind_free (md); |
19639113 | 332 | |
1e6808ea | 333 | switch (*md) |
0f2d19dd | 334 | { |
cb63cf9e JB |
335 | case 'r': |
336 | flags |= O_RDONLY; | |
337 | break; | |
338 | case 'w': | |
339 | flags |= O_WRONLY | O_CREAT | O_TRUNC; | |
340 | break; | |
341 | case 'a': | |
342 | flags |= O_WRONLY | O_CREAT | O_APPEND; | |
343 | break; | |
344 | default: | |
1e6808ea | 345 | scm_out_of_range (FUNC_NAME, mode); |
0f2d19dd | 346 | } |
1e6808ea | 347 | ptr = md + 1; |
cb63cf9e | 348 | while (*ptr != '\0') |
e145dd02 | 349 | { |
cb63cf9e JB |
350 | switch (*ptr) |
351 | { | |
352 | case '+': | |
353 | flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR; | |
354 | break; | |
9f561420 GH |
355 | case 'b': |
356 | #if defined (O_BINARY) | |
357 | flags |= O_BINARY; | |
358 | #endif | |
359 | break; | |
cb63cf9e | 360 | case '0': /* unbuffered: handled later. */ |
d3639214 | 361 | case 'l': /* line buffered: handled during output. */ |
cb63cf9e JB |
362 | break; |
363 | default: | |
1e6808ea | 364 | scm_out_of_range (FUNC_NAME, mode); |
cb63cf9e JB |
365 | } |
366 | ptr++; | |
e145dd02 | 367 | } |
8ab3d8a0 | 368 | SCM_SYSCALL (fdes = open_or_open64 (file, flags, 0666)); |
cb63cf9e | 369 | if (fdes == -1) |
e145dd02 | 370 | { |
cb63cf9e JB |
371 | int en = errno; |
372 | ||
5d2d2ffc | 373 | SCM_SYSERROR_MSG ("~A: ~S", |
fd08c236 | 374 | scm_cons (scm_strerror (scm_from_int (en)), |
5d2d2ffc | 375 | scm_cons (filename, SCM_EOL)), en); |
0f2d19dd | 376 | } |
d617ee18 | 377 | port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode), filename); |
7f9994d9 | 378 | |
661ae7ab | 379 | scm_dynwind_end (); |
7f9994d9 | 380 | |
0f2d19dd JB |
381 | return port; |
382 | } | |
1bbd0b84 | 383 | #undef FUNC_NAME |
0f2d19dd | 384 | |
e145dd02 | 385 | \f |
82893676 MG |
386 | #ifdef __MINGW32__ |
387 | /* | |
388 | * Try getting the appropiate file flags for a given file descriptor | |
389 | * under Windows. This incorporates some fancy operations because Windows | |
390 | * differentiates between file, pipe and socket descriptors. | |
391 | */ | |
392 | #ifndef O_ACCMODE | |
393 | # define O_ACCMODE 0x0003 | |
394 | #endif | |
395 | ||
396 | static int getflags (int fdes) | |
397 | { | |
398 | int flags = 0; | |
399 | struct stat buf; | |
400 | int error, optlen = sizeof (int); | |
401 | ||
402 | /* Is this a socket ? */ | |
403 | if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0) | |
404 | flags = O_RDWR; | |
405 | /* Maybe a regular file ? */ | |
406 | else if (fstat (fdes, &buf) < 0) | |
407 | flags = -1; | |
408 | else | |
409 | { | |
410 | /* Or an anonymous pipe handle ? */ | |
b8b17bfd | 411 | if (buf.st_mode & _S_IFIFO) |
8f99e3f3 SJ |
412 | flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0, |
413 | NULL, NULL, NULL) ? O_RDONLY : O_WRONLY; | |
82893676 | 414 | /* stdin ? */ |
b8b17bfd | 415 | else if (fdes == fileno (stdin) && isatty (fdes)) |
82893676 MG |
416 | flags = O_RDONLY; |
417 | /* stdout / stderr ? */ | |
b8b17bfd MV |
418 | else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) && |
419 | isatty (fdes)) | |
82893676 MG |
420 | flags = O_WRONLY; |
421 | else | |
422 | flags = buf.st_mode; | |
423 | } | |
424 | return flags; | |
425 | } | |
426 | #endif /* __MINGW32__ */ | |
427 | ||
cb63cf9e | 428 | /* Building Guile ports from a file descriptor. */ |
e145dd02 | 429 | |
cb63cf9e | 430 | /* Build a Scheme port from an open file descriptor `fdes'. |
a089567e JB |
431 | MODE indicates whether FILE is open for reading or writing; it uses |
432 | the same notation as open-file's second argument. | |
19b27fa2 GH |
433 | NAME is a string to be used as the port's filename. |
434 | */ | |
a089567e | 435 | SCM |
d617ee18 | 436 | scm_i_fdes_to_port (int fdes, long mode_bits, SCM name) |
19b27fa2 | 437 | #define FUNC_NAME "scm_fdes_to_port" |
a089567e | 438 | { |
a089567e | 439 | SCM port; |
92c2555f | 440 | scm_t_port *pt; |
19b27fa2 GH |
441 | int flags; |
442 | ||
443 | /* test that fdes is valid. */ | |
82893676 MG |
444 | #ifdef __MINGW32__ |
445 | flags = getflags (fdes); | |
446 | #else | |
19b27fa2 | 447 | flags = fcntl (fdes, F_GETFL, 0); |
82893676 | 448 | #endif |
19b27fa2 GH |
449 | if (flags == -1) |
450 | SCM_SYSERROR; | |
451 | flags &= O_ACCMODE; | |
452 | if (flags != O_RDWR | |
453 | && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG)) | |
454 | || (flags != O_RDONLY && (mode_bits & SCM_RDNG)))) | |
455 | { | |
456 | SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL); | |
457 | } | |
a089567e | 458 | |
9de87eea | 459 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
da220f27 HWN |
460 | |
461 | port = scm_new_port_table_entry (scm_tc16_fport); | |
462 | SCM_SET_CELL_TYPE(port, scm_tc16_fport | mode_bits); | |
463 | pt = SCM_PTAB_ENTRY(port); | |
a089567e | 464 | { |
92c2555f | 465 | scm_t_fport *fp |
4c9419ac | 466 | = (scm_t_fport *) scm_gc_malloc (sizeof (scm_t_fport), "file port"); |
c6c79933 | 467 | |
cb63cf9e | 468 | fp->fdes = fdes; |
0de97b83 | 469 | pt->rw_random = SCM_FDES_RANDOM_P (fdes); |
cb63cf9e JB |
470 | SCM_SETSTREAM (port, fp); |
471 | if (mode_bits & SCM_BUF0) | |
472 | scm_fport_buffer_add (port, 0, 0); | |
473 | else | |
474 | scm_fport_buffer_add (port, -1, -1); | |
a089567e | 475 | } |
b24b5e13 | 476 | SCM_SET_FILENAME (port, name); |
9de87eea | 477 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
e145dd02 JB |
478 | return port; |
479 | } | |
19b27fa2 | 480 | #undef FUNC_NAME |
e145dd02 | 481 | |
d617ee18 MV |
482 | SCM |
483 | scm_fdes_to_port (int fdes, char *mode, SCM name) | |
484 | { | |
485 | return scm_i_fdes_to_port (fdes, scm_mode_bits (mode), name); | |
486 | } | |
487 | ||
affc96b5 | 488 | /* Return a lower bound on the number of bytes available for input. */ |
cb63cf9e | 489 | static int |
affc96b5 | 490 | fport_input_waiting (SCM port) |
e145dd02 | 491 | { |
cb63cf9e | 492 | #ifdef HAVE_SELECT |
23f2b9a3 | 493 | int fdes = SCM_FSTREAM (port)->fdes; |
cb63cf9e JB |
494 | struct timeval timeout; |
495 | SELECT_TYPE read_set; | |
496 | SELECT_TYPE write_set; | |
497 | SELECT_TYPE except_set; | |
498 | ||
499 | FD_ZERO (&read_set); | |
500 | FD_ZERO (&write_set); | |
501 | FD_ZERO (&except_set); | |
502 | ||
503 | FD_SET (fdes, &read_set); | |
504 | ||
505 | timeout.tv_sec = 0; | |
506 | timeout.tv_usec = 0; | |
507 | ||
508 | if (select (SELECT_SET_SIZE, | |
509 | &read_set, &write_set, &except_set, &timeout) | |
510 | < 0) | |
affc96b5 GH |
511 | scm_syserror ("fport_input_waiting"); |
512 | return FD_ISSET (fdes, &read_set) ? 1 : 0; | |
23f2b9a3 KR |
513 | |
514 | #elif HAVE_IOCTL && defined (FIONREAD) | |
515 | /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD | |
516 | (for use with winsock ioctlsocket()) but not ioctl(). */ | |
517 | int fdes = SCM_FSTREAM (port)->fdes; | |
cb63cf9e JB |
518 | int remir; |
519 | ioctl(fdes, FIONREAD, &remir); | |
520 | return remir; | |
23f2b9a3 | 521 | |
cb63cf9e | 522 | #else |
affc96b5 | 523 | scm_misc_error ("fport_input_waiting", |
cb63cf9e JB |
524 | "Not fully implemented on this platform", |
525 | SCM_EOL); | |
526 | #endif | |
a089567e JB |
527 | } |
528 | ||
cb63cf9e | 529 | \f |
0f2d19dd | 530 | static int |
e81d98ec | 531 | fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 532 | { |
b3ec3c64 MD |
533 | scm_puts ("#<", port); |
534 | scm_print_port_mode (exp, port); | |
535 | if (SCM_OPFPORTP (exp)) | |
0f2d19dd | 536 | { |
b3ec3c64 | 537 | int fdes; |
b24b5e13 | 538 | SCM name = SCM_FILENAME (exp); |
cc95e00a | 539 | if (scm_is_string (name) || scm_is_symbol (name)) |
b24b5e13 DH |
540 | scm_display (name, port); |
541 | else | |
542 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); | |
b3ec3c64 MD |
543 | scm_putc (' ', port); |
544 | fdes = (SCM_FSTREAM (exp))->fdes; | |
545 | ||
82893676 | 546 | #ifdef HAVE_TTYNAME |
b3ec3c64 | 547 | if (isatty (fdes)) |
eb372585 | 548 | scm_display (scm_ttyname (exp), port); |
b3ec3c64 | 549 | else |
82893676 | 550 | #endif /* HAVE_TTYNAME */ |
b3ec3c64 | 551 | scm_intprint (fdes, 10, port); |
0f2d19dd JB |
552 | } |
553 | else | |
554 | { | |
b3ec3c64 MD |
555 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); |
556 | scm_putc (' ', port); | |
0345e278 | 557 | scm_uintprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port); |
0f2d19dd | 558 | } |
b3ec3c64 MD |
559 | scm_putc ('>', port); |
560 | return 1; | |
0f2d19dd JB |
561 | } |
562 | ||
2e945bcc | 563 | #ifndef __MINGW32__ |
cb63cf9e JB |
564 | /* thread-local block for input on fport's fdes. */ |
565 | static void | |
566 | fport_wait_for_input (SCM port) | |
3cb988bd | 567 | { |
cb63cf9e | 568 | int fdes = SCM_FSTREAM (port)->fdes; |
3cb988bd | 569 | |
affc96b5 | 570 | if (!fport_input_waiting (port)) |
8122b543 | 571 | { |
cb63cf9e JB |
572 | int n; |
573 | SELECT_TYPE readfds; | |
574 | int flags = fcntl (fdes, F_GETFL); | |
575 | ||
576 | if (flags == -1) | |
577 | scm_syserror ("scm_fdes_wait_for_input"); | |
578 | if (!(flags & O_NONBLOCK)) | |
579 | do | |
580 | { | |
581 | FD_ZERO (&readfds); | |
582 | FD_SET (fdes, &readfds); | |
9de87eea | 583 | n = scm_std_select (fdes + 1, &readfds, NULL, NULL, NULL); |
cb63cf9e JB |
584 | } |
585 | while (n == -1 && errno == EINTR); | |
8122b543 | 586 | } |
3cb988bd | 587 | } |
2e945bcc | 588 | #endif /* !__MINGW32__ */ |
0f2d19dd | 589 | |
affc96b5 | 590 | static void fport_flush (SCM port); |
0f2d19dd | 591 | |
c2da2648 GH |
592 | /* fill a port's read-buffer with a single read. returns the first |
593 | char or EOF if end of file. */ | |
0f2d19dd | 594 | static int |
affc96b5 | 595 | fport_fill_input (SCM port) |
0f2d19dd | 596 | { |
c014a02e | 597 | long count; |
92c2555f MV |
598 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
599 | scm_t_fport *fp = SCM_FSTREAM (port); | |
cb63cf9e | 600 | |
2e945bcc | 601 | #ifndef __MINGW32__ |
cb63cf9e | 602 | fport_wait_for_input (port); |
2e945bcc | 603 | #endif /* !__MINGW32__ */ |
cb63cf9e JB |
604 | SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size)); |
605 | if (count == -1) | |
affc96b5 | 606 | scm_syserror ("fport_fill_input"); |
cb63cf9e JB |
607 | if (count == 0) |
608 | return EOF; | |
609 | else | |
610 | { | |
5c070ca7 | 611 | pt->read_pos = pt->read_buf; |
cb63cf9e | 612 | pt->read_end = pt->read_buf + count; |
5c070ca7 | 613 | return *pt->read_buf; |
cb63cf9e | 614 | } |
0f2d19dd JB |
615 | } |
616 | ||
8ab3d8a0 KR |
617 | static off_t_or_off64_t |
618 | fport_seek_or_seek64 (SCM port, off_t_or_off64_t offset, int whence) | |
0f2d19dd | 619 | { |
92c2555f MV |
620 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
621 | scm_t_fport *fp = SCM_FSTREAM (port); | |
8ab3d8a0 KR |
622 | off_t_or_off64_t rv; |
623 | off_t_or_off64_t result; | |
7dcb364d GH |
624 | |
625 | if (pt->rw_active == SCM_PORT_WRITE) | |
626 | { | |
627 | if (offset != 0 || whence != SEEK_CUR) | |
628 | { | |
629 | fport_flush (port); | |
8ab3d8a0 | 630 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
631 | } |
632 | else | |
633 | { | |
634 | /* read current position without disturbing the buffer. */ | |
8ab3d8a0 | 635 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
636 | result = rv + (pt->write_pos - pt->write_buf); |
637 | } | |
638 | } | |
639 | else if (pt->rw_active == SCM_PORT_READ) | |
640 | { | |
641 | if (offset != 0 || whence != SEEK_CUR) | |
642 | { | |
643 | /* could expand to avoid a second seek. */ | |
644 | scm_end_input (port); | |
8ab3d8a0 | 645 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
646 | } |
647 | else | |
648 | { | |
649 | /* read current position without disturbing the buffer | |
650 | (particularly the unread-char buffer). */ | |
8ab3d8a0 | 651 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
652 | result = rv - (pt->read_end - pt->read_pos); |
653 | ||
654 | if (pt->read_buf == pt->putback_buf) | |
655 | result -= pt->saved_read_end - pt->saved_read_pos; | |
656 | } | |
657 | } | |
658 | else /* SCM_PORT_NEITHER */ | |
659 | { | |
8ab3d8a0 | 660 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d | 661 | } |
cb8dfa3f | 662 | |
7dcb364d | 663 | if (rv == -1) |
affc96b5 | 664 | scm_syserror ("fport_seek"); |
7dcb364d | 665 | |
cb8dfa3f | 666 | return result; |
0f2d19dd JB |
667 | } |
668 | ||
8ab3d8a0 KR |
669 | /* If we've got largefile and off_t isn't already off64_t then |
670 | fport_seek_or_seek64 needs a range checking wrapper to be fport_seek in | |
671 | the port descriptor. | |
672 | ||
673 | Otherwise if no largefile, or off_t is the same as off64_t (which is the | |
674 | case on NetBSD apparently), then fport_seek_or_seek64 is right to be | |
675 | fport_seek already. */ | |
676 | ||
677 | #if HAVE_STAT64 && SIZEOF_OFF_T != SIZEOF_OFF64_T | |
678 | static off_t | |
679 | fport_seek (SCM port, off_t offset, int whence) | |
680 | { | |
681 | off64_t rv = fport_seek_or_seek64 (port, (off64_t) offset, whence); | |
682 | if (rv > OFF_T_MAX || rv < OFF_T_MIN) | |
683 | { | |
684 | errno = EOVERFLOW; | |
685 | scm_syserror ("fport_seek"); | |
686 | } | |
687 | return (off_t) rv; | |
688 | ||
689 | } | |
690 | #else | |
691 | #define fport_seek fport_seek_or_seek64 | |
692 | #endif | |
693 | ||
694 | /* `how' has been validated and is one of SEEK_SET, SEEK_CUR or SEEK_END */ | |
695 | SCM | |
696 | scm_i_fport_seek (SCM port, SCM offset, int how) | |
697 | { | |
698 | return scm_from_off_t_or_off64_t | |
699 | (fport_seek_or_seek64 (port, scm_to_off_t_or_off64_t (offset), how)); | |
700 | } | |
701 | ||
840ae05d | 702 | static void |
affc96b5 | 703 | fport_truncate (SCM port, off_t length) |
840ae05d | 704 | { |
92c2555f | 705 | scm_t_fport *fp = SCM_FSTREAM (port); |
840ae05d JB |
706 | |
707 | if (ftruncate (fp->fdes, length) == -1) | |
708 | scm_syserror ("ftruncate"); | |
709 | } | |
710 | ||
8ab3d8a0 KR |
711 | int |
712 | scm_i_fport_truncate (SCM port, SCM length) | |
713 | { | |
714 | scm_t_fport *fp = SCM_FSTREAM (port); | |
715 | return ftruncate_or_ftruncate64 (fp->fdes, scm_to_off_t_or_off64_t (length)); | |
716 | } | |
717 | ||
0c6d2191 GH |
718 | /* helper for fport_write: try to write data, using multiple system |
719 | calls if required. */ | |
720 | #define FUNC_NAME "write_all" | |
721 | static void write_all (SCM port, const void *data, size_t remaining) | |
722 | { | |
723 | int fdes = SCM_FSTREAM (port)->fdes; | |
724 | ||
725 | while (remaining > 0) | |
726 | { | |
82893676 | 727 | size_t done; |
0c6d2191 GH |
728 | |
729 | SCM_SYSCALL (done = write (fdes, data, remaining)); | |
730 | ||
731 | if (done == -1) | |
732 | SCM_SYSERROR; | |
733 | remaining -= done; | |
734 | data = ((const char *) data) + done; | |
735 | } | |
736 | } | |
737 | #undef FUNC_NAME | |
738 | ||
31703ab8 | 739 | static void |
8aa011a1 | 740 | fport_write (SCM port, const void *data, size_t size) |
31703ab8 | 741 | { |
0c6d2191 | 742 | /* this procedure tries to minimize the number of writes/flushes. */ |
92c2555f | 743 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
31703ab8 | 744 | |
0c6d2191 GH |
745 | if (pt->write_buf == &pt->shortbuf |
746 | || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size)) | |
31703ab8 | 747 | { |
0c6d2191 GH |
748 | /* "unbuffered" port, or |
749 | port with empty buffer and data won't fit in buffer. */ | |
750 | write_all (port, data, size); | |
751 | return; | |
31703ab8 | 752 | } |
d3639214 | 753 | |
0c6d2191 GH |
754 | { |
755 | off_t space = pt->write_end - pt->write_pos; | |
756 | ||
757 | if (size <= space) | |
758 | { | |
759 | /* data fits in buffer. */ | |
760 | memcpy (pt->write_pos, data, size); | |
761 | pt->write_pos += size; | |
762 | if (pt->write_pos == pt->write_end) | |
763 | { | |
affc96b5 | 764 | fport_flush (port); |
0c6d2191 GH |
765 | /* we can skip the line-buffering check if nothing's buffered. */ |
766 | return; | |
767 | } | |
768 | } | |
769 | else | |
770 | { | |
771 | memcpy (pt->write_pos, data, space); | |
772 | pt->write_pos = pt->write_end; | |
773 | fport_flush (port); | |
774 | { | |
775 | const void *ptr = ((const char *) data) + space; | |
776 | size_t remaining = size - space; | |
777 | ||
778 | if (size >= pt->write_buf_size) | |
779 | { | |
780 | write_all (port, ptr, remaining); | |
781 | return; | |
782 | } | |
783 | else | |
784 | { | |
785 | memcpy (pt->write_pos, ptr, remaining); | |
786 | pt->write_pos += remaining; | |
787 | } | |
31703ab8 | 788 | } |
0c6d2191 | 789 | } |
31703ab8 | 790 | |
0c6d2191 GH |
791 | /* handle line buffering. */ |
792 | if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size)) | |
793 | fport_flush (port); | |
794 | } | |
31703ab8 GH |
795 | } |
796 | ||
797 | /* becomes 1 when process is exiting: normal exception handling won't | |
798 | work by this time. */ | |
04a98cff | 799 | extern int scm_i_terminating; |
0f2d19dd | 800 | |
cb63cf9e | 801 | static void |
affc96b5 | 802 | fport_flush (SCM port) |
0f2d19dd | 803 | { |
92c2555f MV |
804 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
805 | scm_t_fport *fp = SCM_FSTREAM (port); | |
6f760c1d | 806 | unsigned char *ptr = pt->write_buf; |
c014a02e ML |
807 | long init_size = pt->write_pos - pt->write_buf; |
808 | long remaining = init_size; | |
0f2d19dd | 809 | |
cb63cf9e JB |
810 | while (remaining > 0) |
811 | { | |
c014a02e | 812 | long count; |
cb63cf9e JB |
813 | |
814 | SCM_SYSCALL (count = write (fp->fdes, ptr, remaining)); | |
815 | if (count < 0) | |
816 | { | |
817 | /* error. assume nothing was written this call, but | |
818 | fix up the buffer for any previous successful writes. */ | |
c014a02e | 819 | long done = init_size - remaining; |
cb63cf9e JB |
820 | |
821 | if (done > 0) | |
822 | { | |
823 | int i; | |
824 | ||
825 | for (i = 0; i < remaining; i++) | |
826 | { | |
827 | *(pt->write_buf + i) = *(pt->write_buf + done + i); | |
828 | } | |
829 | pt->write_pos = pt->write_buf + remaining; | |
830 | } | |
04a98cff | 831 | if (scm_i_terminating) |
cb63cf9e JB |
832 | { |
833 | const char *msg = "Error: could not flush file-descriptor "; | |
834 | char buf[11]; | |
835 | ||
836 | write (2, msg, strlen (msg)); | |
837 | sprintf (buf, "%d\n", fp->fdes); | |
838 | write (2, buf, strlen (buf)); | |
839 | ||
840 | count = remaining; | |
841 | } | |
6b72ac1d GH |
842 | else if (scm_gc_running_p) |
843 | { | |
844 | /* silently ignore the error. scm_error would abort if we | |
845 | called it now. */ | |
846 | count = remaining; | |
847 | } | |
848 | else | |
849 | scm_syserror ("fport_flush"); | |
cb63cf9e JB |
850 | } |
851 | ptr += count; | |
852 | remaining -= count; | |
853 | } | |
854 | pt->write_pos = pt->write_buf; | |
61e452ba | 855 | pt->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
856 | } |
857 | ||
283a1a0e | 858 | /* clear the read buffer and adjust the file position for unread bytes. */ |
840ae05d | 859 | static void |
affc96b5 | 860 | fport_end_input (SCM port, int offset) |
840ae05d | 861 | { |
92c2555f MV |
862 | scm_t_fport *fp = SCM_FSTREAM (port); |
863 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
283a1a0e GH |
864 | |
865 | offset += pt->read_end - pt->read_pos; | |
840ae05d | 866 | |
840ae05d JB |
867 | if (offset > 0) |
868 | { | |
869 | pt->read_pos = pt->read_end; | |
870 | /* will throw error if unread-char used at beginning of file | |
871 | then attempting to write. seems correct. */ | |
872 | if (lseek (fp->fdes, -offset, SEEK_CUR) == -1) | |
affc96b5 | 873 | scm_syserror ("fport_end_input"); |
840ae05d | 874 | } |
61e452ba | 875 | pt->rw_active = SCM_PORT_NEITHER; |
8f29fbd0 JB |
876 | } |
877 | ||
6a2c4c81 | 878 | static int |
affc96b5 | 879 | fport_close (SCM port) |
6a2c4c81 | 880 | { |
92c2555f MV |
881 | scm_t_fport *fp = SCM_FSTREAM (port); |
882 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
cb63cf9e | 883 | int rv; |
840ae05d | 884 | |
affc96b5 | 885 | fport_flush (port); |
cb63cf9e JB |
886 | SCM_SYSCALL (rv = close (fp->fdes)); |
887 | if (rv == -1 && errno != EBADF) | |
6b72ac1d GH |
888 | { |
889 | if (scm_gc_running_p) | |
890 | /* silently ignore the error. scm_error would abort if we | |
891 | called it now. */ | |
892 | ; | |
893 | else | |
894 | scm_syserror ("fport_close"); | |
895 | } | |
6c951427 GH |
896 | if (pt->read_buf == pt->putback_buf) |
897 | pt->read_buf = pt->saved_read_buf; | |
cb63cf9e | 898 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 899 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 900 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac MV |
901 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
902 | scm_gc_free (fp, sizeof (*fp), "file port"); | |
cb63cf9e | 903 | return rv; |
6a2c4c81 JB |
904 | } |
905 | ||
1be6b49c | 906 | static size_t |
affc96b5 | 907 | fport_free (SCM port) |
b3ec3c64 | 908 | { |
affc96b5 | 909 | fport_close (port); |
b3ec3c64 MD |
910 | return 0; |
911 | } | |
912 | ||
92c2555f | 913 | static scm_t_bits |
b3ec3c64 MD |
914 | scm_make_fptob () |
915 | { | |
92c2555f | 916 | scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write); |
a98bddfd | 917 | |
affc96b5 | 918 | scm_set_port_free (tc, fport_free); |
e841c3e0 | 919 | scm_set_port_print (tc, fport_print); |
affc96b5 GH |
920 | scm_set_port_flush (tc, fport_flush); |
921 | scm_set_port_end_input (tc, fport_end_input); | |
922 | scm_set_port_close (tc, fport_close); | |
923 | scm_set_port_seek (tc, fport_seek); | |
924 | scm_set_port_truncate (tc, fport_truncate); | |
925 | scm_set_port_input_waiting (tc, fport_input_waiting); | |
a98bddfd DH |
926 | |
927 | return tc; | |
b3ec3c64 | 928 | } |
0f2d19dd | 929 | |
0f2d19dd JB |
930 | void |
931 | scm_init_fports () | |
0f2d19dd | 932 | { |
a98bddfd DH |
933 | scm_tc16_fport = scm_make_fptob (); |
934 | ||
e11e83f3 MV |
935 | scm_c_define ("_IOFBF", scm_from_int (_IOFBF)); |
936 | scm_c_define ("_IOLBF", scm_from_int (_IOLBF)); | |
937 | scm_c_define ("_IONBF", scm_from_int (_IONBF)); | |
a98bddfd | 938 | |
a98bddfd | 939 | #include "libguile/fports.x" |
0f2d19dd | 940 | } |
89e00824 ML |
941 | |
942 | /* | |
943 | Local Variables: | |
944 | c-file-style: "gnu" | |
945 | End: | |
946 | */ |