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 | ||
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 | */ |
ee834df4 LC |
224 | static void |
225 | scm_i_evict_port (void *closure, SCM port) | |
0f2d19dd | 226 | { |
5dbc6c06 | 227 | int fd = * (int*) closure; |
0f2d19dd | 228 | |
5dbc6c06 | 229 | if (SCM_FPORTP (port)) |
eadd48de | 230 | { |
5dbc6c06 | 231 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 232 | |
5dbc6c06 | 233 | if (fp->fdes == fd) |
eadd48de | 234 | { |
5dbc6c06 HWN |
235 | fp->fdes = dup (fd); |
236 | if (fp->fdes == -1) | |
237 | scm_syserror ("scm_evict_ports"); | |
238 | scm_set_port_revealed_x (port, scm_from_int (0)); | |
eadd48de GH |
239 | } |
240 | } | |
5dbc6c06 HWN |
241 | } |
242 | ||
243 | void | |
244 | scm_evict_ports (int fd) | |
245 | { | |
ee834df4 | 246 | scm_c_port_for_each (scm_i_evict_port, (void *) &fd); |
eadd48de | 247 | } |
0f2d19dd | 248 | |
efa40607 DH |
249 | |
250 | SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0, | |
251 | (SCM obj), | |
2069af38 | 252 | "Determine whether @var{obj} is a port that is related to a file.") |
efa40607 DH |
253 | #define FUNC_NAME s_scm_file_port_p |
254 | { | |
7888309b | 255 | return scm_from_bool (SCM_FPORTP (obj)); |
efa40607 DH |
256 | } |
257 | #undef FUNC_NAME | |
258 | ||
259 | ||
0f2d19dd JB |
260 | /* scm_open_file |
261 | * Return a new port open on a given file. | |
262 | * | |
263 | * The mode string must match the pattern: [rwa+]** which | |
264 | * is interpreted in the usual unix way. | |
265 | * | |
266 | * Return the new port. | |
267 | */ | |
3b3b36dd | 268 | SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0, |
1e6808ea MG |
269 | (SCM filename, SCM mode), |
270 | "Open the file whose name is @var{filename}, and return a port\n" | |
fc0d72d4 | 271 | "representing that file. The attributes of the port are\n" |
1e6808ea MG |
272 | "determined by the @var{mode} string. The way in which this is\n" |
273 | "interpreted is similar to C stdio. The first character must be\n" | |
274 | "one of the following:\n" | |
fc0d72d4 MD |
275 | "@table @samp\n" |
276 | "@item r\n" | |
277 | "Open an existing file for input.\n" | |
278 | "@item w\n" | |
279 | "Open a file for output, creating it if it doesn't already exist\n" | |
280 | "or removing its contents if it does.\n" | |
281 | "@item a\n" | |
1e6808ea MG |
282 | "Open a file for output, creating it if it doesn't already\n" |
283 | "exist. All writes to the port will go to the end of the file.\n" | |
fc0d72d4 MD |
284 | "The \"append mode\" can be turned off while the port is in use\n" |
285 | "@pxref{Ports and File Descriptors, fcntl}\n" | |
1e6808ea MG |
286 | "@end table\n" |
287 | "The following additional characters can be appended:\n" | |
fc0d72d4 | 288 | "@table @samp\n" |
fc9c5d06 HWN |
289 | "@item b\n" |
290 | "Open the underlying file in binary mode, if supported by the operating system. " | |
fc0d72d4 MD |
291 | "@item +\n" |
292 | "Open the port for both input and output. E.g., @code{r+}: open\n" | |
293 | "an existing file for both input and output.\n" | |
294 | "@item 0\n" | |
1e6808ea MG |
295 | "Create an \"unbuffered\" port. In this case input and output\n" |
296 | "operations are passed directly to the underlying port\n" | |
297 | "implementation without additional buffering. This is likely to\n" | |
298 | "slow down I/O operations. The buffering mode can be changed\n" | |
299 | "while a port is in use @pxref{Ports and File Descriptors,\n" | |
300 | "setvbuf}\n" | |
fc0d72d4 MD |
301 | "@item l\n" |
302 | "Add line-buffering to the port. The port output buffer will be\n" | |
303 | "automatically flushed whenever a newline character is written.\n" | |
1e6808ea MG |
304 | "@end table\n" |
305 | "In theory we could create read/write ports which were buffered\n" | |
306 | "in one direction only. However this isn't included in the\n" | |
307 | "current interfaces. If a file cannot be opened with the access\n" | |
308 | "requested, @code{open-file} throws an exception.") | |
1bbd0b84 | 309 | #define FUNC_NAME s_scm_open_file |
0f2d19dd | 310 | { |
19639113 | 311 | SCM port; |
cb63cf9e JB |
312 | int fdes; |
313 | int flags = 0; | |
19639113 | 314 | char *file; |
1e6808ea | 315 | char *md; |
cb63cf9e | 316 | char *ptr; |
19639113 | 317 | |
661ae7ab | 318 | scm_dynwind_begin (0); |
19639113 | 319 | |
7f9994d9 | 320 | file = scm_to_locale_string (filename); |
661ae7ab | 321 | scm_dynwind_free (file); |
7f9994d9 MV |
322 | |
323 | md = scm_to_locale_string (mode); | |
661ae7ab | 324 | scm_dynwind_free (md); |
19639113 | 325 | |
1e6808ea | 326 | switch (*md) |
0f2d19dd | 327 | { |
cb63cf9e JB |
328 | case 'r': |
329 | flags |= O_RDONLY; | |
330 | break; | |
331 | case 'w': | |
332 | flags |= O_WRONLY | O_CREAT | O_TRUNC; | |
333 | break; | |
334 | case 'a': | |
335 | flags |= O_WRONLY | O_CREAT | O_APPEND; | |
336 | break; | |
337 | default: | |
1e6808ea | 338 | scm_out_of_range (FUNC_NAME, mode); |
0f2d19dd | 339 | } |
1e6808ea | 340 | ptr = md + 1; |
cb63cf9e | 341 | while (*ptr != '\0') |
e145dd02 | 342 | { |
cb63cf9e JB |
343 | switch (*ptr) |
344 | { | |
345 | case '+': | |
346 | flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR; | |
347 | break; | |
9f561420 GH |
348 | case 'b': |
349 | #if defined (O_BINARY) | |
350 | flags |= O_BINARY; | |
351 | #endif | |
352 | break; | |
cb63cf9e | 353 | case '0': /* unbuffered: handled later. */ |
d3639214 | 354 | case 'l': /* line buffered: handled during output. */ |
cb63cf9e JB |
355 | break; |
356 | default: | |
1e6808ea | 357 | scm_out_of_range (FUNC_NAME, mode); |
cb63cf9e JB |
358 | } |
359 | ptr++; | |
e145dd02 | 360 | } |
8ab3d8a0 | 361 | SCM_SYSCALL (fdes = open_or_open64 (file, flags, 0666)); |
cb63cf9e | 362 | if (fdes == -1) |
e145dd02 | 363 | { |
cb63cf9e JB |
364 | int en = errno; |
365 | ||
5d2d2ffc | 366 | SCM_SYSERROR_MSG ("~A: ~S", |
fd08c236 | 367 | scm_cons (scm_strerror (scm_from_int (en)), |
5d2d2ffc | 368 | scm_cons (filename, SCM_EOL)), en); |
0f2d19dd | 369 | } |
d617ee18 | 370 | port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode), filename); |
7f9994d9 | 371 | |
661ae7ab | 372 | scm_dynwind_end (); |
7f9994d9 | 373 | |
0f2d19dd JB |
374 | return port; |
375 | } | |
1bbd0b84 | 376 | #undef FUNC_NAME |
0f2d19dd | 377 | |
e145dd02 | 378 | \f |
82893676 MG |
379 | #ifdef __MINGW32__ |
380 | /* | |
381 | * Try getting the appropiate file flags for a given file descriptor | |
382 | * under Windows. This incorporates some fancy operations because Windows | |
383 | * differentiates between file, pipe and socket descriptors. | |
384 | */ | |
385 | #ifndef O_ACCMODE | |
386 | # define O_ACCMODE 0x0003 | |
387 | #endif | |
388 | ||
389 | static int getflags (int fdes) | |
390 | { | |
391 | int flags = 0; | |
392 | struct stat buf; | |
393 | int error, optlen = sizeof (int); | |
394 | ||
395 | /* Is this a socket ? */ | |
396 | if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0) | |
397 | flags = O_RDWR; | |
398 | /* Maybe a regular file ? */ | |
399 | else if (fstat (fdes, &buf) < 0) | |
400 | flags = -1; | |
401 | else | |
402 | { | |
403 | /* Or an anonymous pipe handle ? */ | |
b8b17bfd | 404 | if (buf.st_mode & _S_IFIFO) |
8f99e3f3 SJ |
405 | flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0, |
406 | NULL, NULL, NULL) ? O_RDONLY : O_WRONLY; | |
82893676 | 407 | /* stdin ? */ |
b8b17bfd | 408 | else if (fdes == fileno (stdin) && isatty (fdes)) |
82893676 MG |
409 | flags = O_RDONLY; |
410 | /* stdout / stderr ? */ | |
b8b17bfd MV |
411 | else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) && |
412 | isatty (fdes)) | |
82893676 MG |
413 | flags = O_WRONLY; |
414 | else | |
415 | flags = buf.st_mode; | |
416 | } | |
417 | return flags; | |
418 | } | |
419 | #endif /* __MINGW32__ */ | |
420 | ||
cb63cf9e | 421 | /* Building Guile ports from a file descriptor. */ |
e145dd02 | 422 | |
cb63cf9e | 423 | /* Build a Scheme port from an open file descriptor `fdes'. |
a089567e JB |
424 | MODE indicates whether FILE is open for reading or writing; it uses |
425 | the same notation as open-file's second argument. | |
19b27fa2 GH |
426 | NAME is a string to be used as the port's filename. |
427 | */ | |
a089567e | 428 | SCM |
d617ee18 | 429 | scm_i_fdes_to_port (int fdes, long mode_bits, SCM name) |
19b27fa2 | 430 | #define FUNC_NAME "scm_fdes_to_port" |
a089567e | 431 | { |
a089567e | 432 | SCM port; |
92c2555f | 433 | scm_t_port *pt; |
19b27fa2 GH |
434 | int flags; |
435 | ||
436 | /* test that fdes is valid. */ | |
82893676 MG |
437 | #ifdef __MINGW32__ |
438 | flags = getflags (fdes); | |
439 | #else | |
19b27fa2 | 440 | flags = fcntl (fdes, F_GETFL, 0); |
82893676 | 441 | #endif |
19b27fa2 GH |
442 | if (flags == -1) |
443 | SCM_SYSERROR; | |
444 | flags &= O_ACCMODE; | |
445 | if (flags != O_RDWR | |
446 | && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG)) | |
447 | || (flags != O_RDONLY && (mode_bits & SCM_RDNG)))) | |
448 | { | |
449 | SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL); | |
450 | } | |
a089567e | 451 | |
9de87eea | 452 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
da220f27 HWN |
453 | |
454 | port = scm_new_port_table_entry (scm_tc16_fport); | |
455 | SCM_SET_CELL_TYPE(port, scm_tc16_fport | mode_bits); | |
456 | pt = SCM_PTAB_ENTRY(port); | |
a089567e | 457 | { |
92c2555f | 458 | scm_t_fport *fp |
4c9419ac | 459 | = (scm_t_fport *) scm_gc_malloc (sizeof (scm_t_fport), "file port"); |
c6c79933 | 460 | |
cb63cf9e | 461 | fp->fdes = fdes; |
0de97b83 | 462 | pt->rw_random = SCM_FDES_RANDOM_P (fdes); |
cb63cf9e JB |
463 | SCM_SETSTREAM (port, fp); |
464 | if (mode_bits & SCM_BUF0) | |
465 | scm_fport_buffer_add (port, 0, 0); | |
466 | else | |
467 | scm_fport_buffer_add (port, -1, -1); | |
a089567e | 468 | } |
b24b5e13 | 469 | SCM_SET_FILENAME (port, name); |
9de87eea | 470 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
e145dd02 JB |
471 | return port; |
472 | } | |
19b27fa2 | 473 | #undef FUNC_NAME |
e145dd02 | 474 | |
d617ee18 MV |
475 | SCM |
476 | scm_fdes_to_port (int fdes, char *mode, SCM name) | |
477 | { | |
478 | return scm_i_fdes_to_port (fdes, scm_mode_bits (mode), name); | |
479 | } | |
480 | ||
affc96b5 | 481 | /* Return a lower bound on the number of bytes available for input. */ |
cb63cf9e | 482 | static int |
affc96b5 | 483 | fport_input_waiting (SCM port) |
e145dd02 | 484 | { |
cb63cf9e | 485 | #ifdef HAVE_SELECT |
23f2b9a3 | 486 | int fdes = SCM_FSTREAM (port)->fdes; |
cb63cf9e JB |
487 | struct timeval timeout; |
488 | SELECT_TYPE read_set; | |
489 | SELECT_TYPE write_set; | |
490 | SELECT_TYPE except_set; | |
491 | ||
492 | FD_ZERO (&read_set); | |
493 | FD_ZERO (&write_set); | |
494 | FD_ZERO (&except_set); | |
495 | ||
496 | FD_SET (fdes, &read_set); | |
497 | ||
498 | timeout.tv_sec = 0; | |
499 | timeout.tv_usec = 0; | |
500 | ||
501 | if (select (SELECT_SET_SIZE, | |
502 | &read_set, &write_set, &except_set, &timeout) | |
503 | < 0) | |
affc96b5 GH |
504 | scm_syserror ("fport_input_waiting"); |
505 | return FD_ISSET (fdes, &read_set) ? 1 : 0; | |
23f2b9a3 KR |
506 | |
507 | #elif HAVE_IOCTL && defined (FIONREAD) | |
508 | /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD | |
509 | (for use with winsock ioctlsocket()) but not ioctl(). */ | |
510 | int fdes = SCM_FSTREAM (port)->fdes; | |
cb63cf9e JB |
511 | int remir; |
512 | ioctl(fdes, FIONREAD, &remir); | |
513 | return remir; | |
23f2b9a3 | 514 | |
cb63cf9e | 515 | #else |
affc96b5 | 516 | scm_misc_error ("fport_input_waiting", |
cb63cf9e JB |
517 | "Not fully implemented on this platform", |
518 | SCM_EOL); | |
519 | #endif | |
a089567e JB |
520 | } |
521 | ||
cb63cf9e | 522 | \f |
0f2d19dd | 523 | static int |
e81d98ec | 524 | fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 525 | { |
b3ec3c64 MD |
526 | scm_puts ("#<", port); |
527 | scm_print_port_mode (exp, port); | |
528 | if (SCM_OPFPORTP (exp)) | |
0f2d19dd | 529 | { |
b3ec3c64 | 530 | int fdes; |
b24b5e13 | 531 | SCM name = SCM_FILENAME (exp); |
cc95e00a | 532 | if (scm_is_string (name) || scm_is_symbol (name)) |
b24b5e13 DH |
533 | scm_display (name, port); |
534 | else | |
535 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); | |
b3ec3c64 MD |
536 | scm_putc (' ', port); |
537 | fdes = (SCM_FSTREAM (exp))->fdes; | |
538 | ||
82893676 | 539 | #ifdef HAVE_TTYNAME |
b3ec3c64 | 540 | if (isatty (fdes)) |
eb372585 | 541 | scm_display (scm_ttyname (exp), port); |
b3ec3c64 | 542 | else |
82893676 | 543 | #endif /* HAVE_TTYNAME */ |
b3ec3c64 | 544 | scm_intprint (fdes, 10, port); |
0f2d19dd JB |
545 | } |
546 | else | |
547 | { | |
b3ec3c64 MD |
548 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); |
549 | scm_putc (' ', port); | |
0345e278 | 550 | scm_uintprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port); |
0f2d19dd | 551 | } |
b3ec3c64 MD |
552 | scm_putc ('>', port); |
553 | return 1; | |
0f2d19dd JB |
554 | } |
555 | ||
2e945bcc | 556 | #ifndef __MINGW32__ |
cb63cf9e JB |
557 | /* thread-local block for input on fport's fdes. */ |
558 | static void | |
559 | fport_wait_for_input (SCM port) | |
3cb988bd | 560 | { |
cb63cf9e | 561 | int fdes = SCM_FSTREAM (port)->fdes; |
3cb988bd | 562 | |
affc96b5 | 563 | if (!fport_input_waiting (port)) |
8122b543 | 564 | { |
cb63cf9e JB |
565 | int n; |
566 | SELECT_TYPE readfds; | |
567 | int flags = fcntl (fdes, F_GETFL); | |
568 | ||
569 | if (flags == -1) | |
570 | scm_syserror ("scm_fdes_wait_for_input"); | |
571 | if (!(flags & O_NONBLOCK)) | |
572 | do | |
573 | { | |
574 | FD_ZERO (&readfds); | |
575 | FD_SET (fdes, &readfds); | |
9de87eea | 576 | n = scm_std_select (fdes + 1, &readfds, NULL, NULL, NULL); |
cb63cf9e JB |
577 | } |
578 | while (n == -1 && errno == EINTR); | |
8122b543 | 579 | } |
3cb988bd | 580 | } |
2e945bcc | 581 | #endif /* !__MINGW32__ */ |
0f2d19dd | 582 | |
affc96b5 | 583 | static void fport_flush (SCM port); |
0f2d19dd | 584 | |
c2da2648 GH |
585 | /* fill a port's read-buffer with a single read. returns the first |
586 | char or EOF if end of file. */ | |
0f2d19dd | 587 | static int |
affc96b5 | 588 | fport_fill_input (SCM port) |
0f2d19dd | 589 | { |
c014a02e | 590 | long count; |
92c2555f MV |
591 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
592 | scm_t_fport *fp = SCM_FSTREAM (port); | |
cb63cf9e | 593 | |
2e945bcc | 594 | #ifndef __MINGW32__ |
cb63cf9e | 595 | fport_wait_for_input (port); |
2e945bcc | 596 | #endif /* !__MINGW32__ */ |
cb63cf9e JB |
597 | SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size)); |
598 | if (count == -1) | |
affc96b5 | 599 | scm_syserror ("fport_fill_input"); |
cb63cf9e JB |
600 | if (count == 0) |
601 | return EOF; | |
602 | else | |
603 | { | |
5c070ca7 | 604 | pt->read_pos = pt->read_buf; |
cb63cf9e | 605 | pt->read_end = pt->read_buf + count; |
5c070ca7 | 606 | return *pt->read_buf; |
cb63cf9e | 607 | } |
0f2d19dd JB |
608 | } |
609 | ||
8ab3d8a0 KR |
610 | static off_t_or_off64_t |
611 | fport_seek_or_seek64 (SCM port, off_t_or_off64_t offset, int whence) | |
0f2d19dd | 612 | { |
92c2555f MV |
613 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
614 | scm_t_fport *fp = SCM_FSTREAM (port); | |
8ab3d8a0 KR |
615 | off_t_or_off64_t rv; |
616 | off_t_or_off64_t result; | |
7dcb364d GH |
617 | |
618 | if (pt->rw_active == SCM_PORT_WRITE) | |
619 | { | |
620 | if (offset != 0 || whence != SEEK_CUR) | |
621 | { | |
622 | fport_flush (port); | |
8ab3d8a0 | 623 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
624 | } |
625 | else | |
626 | { | |
627 | /* read current position without disturbing the buffer. */ | |
8ab3d8a0 | 628 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
629 | result = rv + (pt->write_pos - pt->write_buf); |
630 | } | |
631 | } | |
632 | else if (pt->rw_active == SCM_PORT_READ) | |
633 | { | |
634 | if (offset != 0 || whence != SEEK_CUR) | |
635 | { | |
636 | /* could expand to avoid a second seek. */ | |
637 | scm_end_input (port); | |
8ab3d8a0 | 638 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
639 | } |
640 | else | |
641 | { | |
642 | /* read current position without disturbing the buffer | |
643 | (particularly the unread-char buffer). */ | |
8ab3d8a0 | 644 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
645 | result = rv - (pt->read_end - pt->read_pos); |
646 | ||
647 | if (pt->read_buf == pt->putback_buf) | |
648 | result -= pt->saved_read_end - pt->saved_read_pos; | |
649 | } | |
650 | } | |
651 | else /* SCM_PORT_NEITHER */ | |
652 | { | |
8ab3d8a0 | 653 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d | 654 | } |
cb8dfa3f | 655 | |
7dcb364d | 656 | if (rv == -1) |
affc96b5 | 657 | scm_syserror ("fport_seek"); |
7dcb364d | 658 | |
cb8dfa3f | 659 | return result; |
0f2d19dd JB |
660 | } |
661 | ||
8ab3d8a0 KR |
662 | /* If we've got largefile and off_t isn't already off64_t then |
663 | fport_seek_or_seek64 needs a range checking wrapper to be fport_seek in | |
664 | the port descriptor. | |
665 | ||
666 | Otherwise if no largefile, or off_t is the same as off64_t (which is the | |
667 | case on NetBSD apparently), then fport_seek_or_seek64 is right to be | |
668 | fport_seek already. */ | |
669 | ||
d05bcb2e | 670 | #if GUILE_USE_64_CALLS && HAVE_STAT64 && SIZEOF_OFF_T != SIZEOF_OFF64_T |
8ab3d8a0 KR |
671 | static off_t |
672 | fport_seek (SCM port, off_t offset, int whence) | |
673 | { | |
674 | off64_t rv = fport_seek_or_seek64 (port, (off64_t) offset, whence); | |
675 | if (rv > OFF_T_MAX || rv < OFF_T_MIN) | |
676 | { | |
677 | errno = EOVERFLOW; | |
678 | scm_syserror ("fport_seek"); | |
679 | } | |
680 | return (off_t) rv; | |
681 | ||
682 | } | |
683 | #else | |
684 | #define fport_seek fport_seek_or_seek64 | |
685 | #endif | |
686 | ||
687 | /* `how' has been validated and is one of SEEK_SET, SEEK_CUR or SEEK_END */ | |
688 | SCM | |
689 | scm_i_fport_seek (SCM port, SCM offset, int how) | |
690 | { | |
691 | return scm_from_off_t_or_off64_t | |
692 | (fport_seek_or_seek64 (port, scm_to_off_t_or_off64_t (offset), how)); | |
693 | } | |
694 | ||
840ae05d | 695 | static void |
affc96b5 | 696 | fport_truncate (SCM port, off_t length) |
840ae05d | 697 | { |
92c2555f | 698 | scm_t_fport *fp = SCM_FSTREAM (port); |
840ae05d JB |
699 | |
700 | if (ftruncate (fp->fdes, length) == -1) | |
701 | scm_syserror ("ftruncate"); | |
702 | } | |
703 | ||
8ab3d8a0 KR |
704 | int |
705 | scm_i_fport_truncate (SCM port, SCM length) | |
706 | { | |
707 | scm_t_fport *fp = SCM_FSTREAM (port); | |
708 | return ftruncate_or_ftruncate64 (fp->fdes, scm_to_off_t_or_off64_t (length)); | |
709 | } | |
710 | ||
0c6d2191 GH |
711 | /* helper for fport_write: try to write data, using multiple system |
712 | calls if required. */ | |
713 | #define FUNC_NAME "write_all" | |
714 | static void write_all (SCM port, const void *data, size_t remaining) | |
715 | { | |
716 | int fdes = SCM_FSTREAM (port)->fdes; | |
717 | ||
718 | while (remaining > 0) | |
719 | { | |
82893676 | 720 | size_t done; |
0c6d2191 GH |
721 | |
722 | SCM_SYSCALL (done = write (fdes, data, remaining)); | |
723 | ||
724 | if (done == -1) | |
725 | SCM_SYSERROR; | |
726 | remaining -= done; | |
727 | data = ((const char *) data) + done; | |
728 | } | |
729 | } | |
730 | #undef FUNC_NAME | |
731 | ||
31703ab8 | 732 | static void |
8aa011a1 | 733 | fport_write (SCM port, const void *data, size_t size) |
31703ab8 | 734 | { |
0c6d2191 | 735 | /* this procedure tries to minimize the number of writes/flushes. */ |
92c2555f | 736 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
31703ab8 | 737 | |
0c6d2191 GH |
738 | if (pt->write_buf == &pt->shortbuf |
739 | || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size)) | |
31703ab8 | 740 | { |
0c6d2191 GH |
741 | /* "unbuffered" port, or |
742 | port with empty buffer and data won't fit in buffer. */ | |
743 | write_all (port, data, size); | |
744 | return; | |
31703ab8 | 745 | } |
d3639214 | 746 | |
0c6d2191 GH |
747 | { |
748 | off_t space = pt->write_end - pt->write_pos; | |
749 | ||
750 | if (size <= space) | |
751 | { | |
752 | /* data fits in buffer. */ | |
753 | memcpy (pt->write_pos, data, size); | |
754 | pt->write_pos += size; | |
755 | if (pt->write_pos == pt->write_end) | |
756 | { | |
affc96b5 | 757 | fport_flush (port); |
0c6d2191 GH |
758 | /* we can skip the line-buffering check if nothing's buffered. */ |
759 | return; | |
760 | } | |
761 | } | |
762 | else | |
763 | { | |
764 | memcpy (pt->write_pos, data, space); | |
765 | pt->write_pos = pt->write_end; | |
766 | fport_flush (port); | |
767 | { | |
768 | const void *ptr = ((const char *) data) + space; | |
769 | size_t remaining = size - space; | |
770 | ||
771 | if (size >= pt->write_buf_size) | |
772 | { | |
773 | write_all (port, ptr, remaining); | |
774 | return; | |
775 | } | |
776 | else | |
777 | { | |
778 | memcpy (pt->write_pos, ptr, remaining); | |
779 | pt->write_pos += remaining; | |
780 | } | |
31703ab8 | 781 | } |
0c6d2191 | 782 | } |
31703ab8 | 783 | |
0c6d2191 GH |
784 | /* handle line buffering. */ |
785 | if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size)) | |
786 | fport_flush (port); | |
787 | } | |
31703ab8 GH |
788 | } |
789 | ||
790 | /* becomes 1 when process is exiting: normal exception handling won't | |
791 | work by this time. */ | |
04a98cff | 792 | extern int scm_i_terminating; |
0f2d19dd | 793 | |
cb63cf9e | 794 | static void |
affc96b5 | 795 | fport_flush (SCM port) |
0f2d19dd | 796 | { |
92c2555f MV |
797 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
798 | scm_t_fport *fp = SCM_FSTREAM (port); | |
6f760c1d | 799 | unsigned char *ptr = pt->write_buf; |
c014a02e ML |
800 | long init_size = pt->write_pos - pt->write_buf; |
801 | long remaining = init_size; | |
0f2d19dd | 802 | |
cb63cf9e JB |
803 | while (remaining > 0) |
804 | { | |
c014a02e | 805 | long count; |
cb63cf9e JB |
806 | |
807 | SCM_SYSCALL (count = write (fp->fdes, ptr, remaining)); | |
808 | if (count < 0) | |
809 | { | |
810 | /* error. assume nothing was written this call, but | |
811 | fix up the buffer for any previous successful writes. */ | |
c014a02e | 812 | long done = init_size - remaining; |
cb63cf9e JB |
813 | |
814 | if (done > 0) | |
815 | { | |
816 | int i; | |
817 | ||
818 | for (i = 0; i < remaining; i++) | |
819 | { | |
820 | *(pt->write_buf + i) = *(pt->write_buf + done + i); | |
821 | } | |
822 | pt->write_pos = pt->write_buf + remaining; | |
823 | } | |
04a98cff | 824 | if (scm_i_terminating) |
cb63cf9e JB |
825 | { |
826 | const char *msg = "Error: could not flush file-descriptor "; | |
827 | char buf[11]; | |
828 | ||
829 | write (2, msg, strlen (msg)); | |
830 | sprintf (buf, "%d\n", fp->fdes); | |
831 | write (2, buf, strlen (buf)); | |
832 | ||
833 | count = remaining; | |
834 | } | |
6b72ac1d GH |
835 | else if (scm_gc_running_p) |
836 | { | |
837 | /* silently ignore the error. scm_error would abort if we | |
838 | called it now. */ | |
839 | count = remaining; | |
840 | } | |
841 | else | |
842 | scm_syserror ("fport_flush"); | |
cb63cf9e JB |
843 | } |
844 | ptr += count; | |
845 | remaining -= count; | |
846 | } | |
847 | pt->write_pos = pt->write_buf; | |
61e452ba | 848 | pt->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
849 | } |
850 | ||
283a1a0e | 851 | /* clear the read buffer and adjust the file position for unread bytes. */ |
840ae05d | 852 | static void |
affc96b5 | 853 | fport_end_input (SCM port, int offset) |
840ae05d | 854 | { |
92c2555f MV |
855 | scm_t_fport *fp = SCM_FSTREAM (port); |
856 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
283a1a0e GH |
857 | |
858 | offset += pt->read_end - pt->read_pos; | |
840ae05d | 859 | |
840ae05d JB |
860 | if (offset > 0) |
861 | { | |
862 | pt->read_pos = pt->read_end; | |
863 | /* will throw error if unread-char used at beginning of file | |
864 | then attempting to write. seems correct. */ | |
865 | if (lseek (fp->fdes, -offset, SEEK_CUR) == -1) | |
affc96b5 | 866 | scm_syserror ("fport_end_input"); |
840ae05d | 867 | } |
61e452ba | 868 | pt->rw_active = SCM_PORT_NEITHER; |
8f29fbd0 JB |
869 | } |
870 | ||
6a2c4c81 | 871 | static int |
affc96b5 | 872 | fport_close (SCM port) |
6a2c4c81 | 873 | { |
92c2555f MV |
874 | scm_t_fport *fp = SCM_FSTREAM (port); |
875 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
cb63cf9e | 876 | int rv; |
840ae05d | 877 | |
affc96b5 | 878 | fport_flush (port); |
cb63cf9e JB |
879 | SCM_SYSCALL (rv = close (fp->fdes)); |
880 | if (rv == -1 && errno != EBADF) | |
6b72ac1d GH |
881 | { |
882 | if (scm_gc_running_p) | |
883 | /* silently ignore the error. scm_error would abort if we | |
884 | called it now. */ | |
885 | ; | |
886 | else | |
887 | scm_syserror ("fport_close"); | |
888 | } | |
6c951427 GH |
889 | if (pt->read_buf == pt->putback_buf) |
890 | pt->read_buf = pt->saved_read_buf; | |
cb63cf9e | 891 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 892 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 893 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac MV |
894 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
895 | scm_gc_free (fp, sizeof (*fp), "file port"); | |
cb63cf9e | 896 | return rv; |
6a2c4c81 JB |
897 | } |
898 | ||
1be6b49c | 899 | static size_t |
affc96b5 | 900 | fport_free (SCM port) |
b3ec3c64 | 901 | { |
affc96b5 | 902 | fport_close (port); |
b3ec3c64 MD |
903 | return 0; |
904 | } | |
905 | ||
92c2555f | 906 | static scm_t_bits |
b3ec3c64 MD |
907 | scm_make_fptob () |
908 | { | |
92c2555f | 909 | scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write); |
a98bddfd | 910 | |
affc96b5 | 911 | scm_set_port_free (tc, fport_free); |
e841c3e0 | 912 | scm_set_port_print (tc, fport_print); |
affc96b5 GH |
913 | scm_set_port_flush (tc, fport_flush); |
914 | scm_set_port_end_input (tc, fport_end_input); | |
915 | scm_set_port_close (tc, fport_close); | |
916 | scm_set_port_seek (tc, fport_seek); | |
917 | scm_set_port_truncate (tc, fport_truncate); | |
918 | scm_set_port_input_waiting (tc, fport_input_waiting); | |
a98bddfd DH |
919 | |
920 | return tc; | |
b3ec3c64 | 921 | } |
0f2d19dd | 922 | |
0f2d19dd JB |
923 | void |
924 | scm_init_fports () | |
0f2d19dd | 925 | { |
a98bddfd DH |
926 | scm_tc16_fport = scm_make_fptob (); |
927 | ||
e11e83f3 MV |
928 | scm_c_define ("_IOFBF", scm_from_int (_IOFBF)); |
929 | scm_c_define ("_IOLBF", scm_from_int (_IOLBF)); | |
930 | scm_c_define ("_IONBF", scm_from_int (_IONBF)); | |
a98bddfd | 931 | |
a98bddfd | 932 | #include "libguile/fports.x" |
0f2d19dd | 933 | } |
89e00824 ML |
934 | |
935 | /* | |
936 | Local Variables: | |
937 | c-file-style: "gnu" | |
938 | End: | |
939 | */ |