Commit | Line | Data |
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daa4a3f1 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
8ab3d8a0 KR |
21 | #define _LARGEFILE64_SOURCE /* ask for stat64 etc */ |
22 | ||
dbb605f5 | 23 | #ifdef HAVE_CONFIG_H |
85286595 RB |
24 | # include <config.h> |
25 | #endif | |
0f2d19dd JB |
26 | |
27 | #include <stdio.h> | |
cb63cf9e | 28 | #include <fcntl.h> |
a0599745 MD |
29 | #include "libguile/_scm.h" |
30 | #include "libguile/strings.h" | |
a0599745 | 31 | #include "libguile/validate.h" |
6b72ac1d | 32 | #include "libguile/gc.h" |
eb372585 | 33 | #include "libguile/posix.h" |
7f9994d9 | 34 | #include "libguile/dynwind.h" |
5dbc6c06 | 35 | #include "libguile/hashtab.h" |
6b72ac1d | 36 | |
a0599745 | 37 | #include "libguile/fports.h" |
95b88819 GH |
38 | |
39 | #ifdef HAVE_STRING_H | |
40 | #include <string.h> | |
41 | #endif | |
0f2d19dd JB |
42 | #ifdef HAVE_UNISTD_H |
43 | #include <unistd.h> | |
0f2d19dd | 44 | #endif |
b8b17bfd MV |
45 | #ifdef HAVE_IO_H |
46 | #include <io.h> | |
47 | #endif | |
f47a5239 | 48 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e JB |
49 | #include <sys/stat.h> |
50 | #endif | |
0f2d19dd | 51 | |
cb63cf9e | 52 | #include <errno.h> |
8ab3d8a0 | 53 | #include <sys/types.h> |
e145dd02 | 54 | |
a0599745 | 55 | #include "libguile/iselect.h" |
edb810bb SJ |
56 | |
57 | /* Some defines for Windows (native port, not Cygwin). */ | |
82893676 MG |
58 | #ifdef __MINGW32__ |
59 | # include <sys/stat.h> | |
60 | # include <winsock2.h> | |
82893676 | 61 | #endif /* __MINGW32__ */ |
cb63cf9e | 62 | |
634aa8de LC |
63 | #include <full-write.h> |
64 | ||
8ab3d8a0 KR |
65 | /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize |
66 | already, but have this code here in case that wasn't so in past versions, | |
67 | or perhaps to help other minimal DOS environments. | |
68 | ||
69 | gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which | |
70 | might be possibilities if we've got other systems without ftruncate. */ | |
71 | ||
56a3dcd4 | 72 | #if defined HAVE_CHSIZE && ! defined HAVE_FTRUNCATE |
8ab3d8a0 | 73 | # define ftruncate(fd, size) chsize (fd, size) |
56a3dcd4 LC |
74 | # undef HAVE_FTRUNCATE |
75 | # define HAVE_FTRUNCATE 1 | |
8ab3d8a0 KR |
76 | #endif |
77 | ||
78 | #if SIZEOF_OFF_T == SIZEOF_INT | |
79 | #define OFF_T_MAX INT_MAX | |
80 | #define OFF_T_MIN INT_MIN | |
81 | #elif SIZEOF_OFF_T == SIZEOF_LONG | |
82 | #define OFF_T_MAX LONG_MAX | |
83 | #define OFF_T_MIN LONG_MIN | |
84 | #elif SIZEOF_OFF_T == SIZEOF_LONG_LONG | |
85 | #define OFF_T_MAX LONG_LONG_MAX | |
86 | #define OFF_T_MIN LONG_LONG_MIN | |
87 | #else | |
88 | #error Oops, unknown OFF_T size | |
89 | #endif | |
a98bddfd | 90 | |
92c2555f | 91 | scm_t_bits scm_tc16_fport; |
a98bddfd DH |
92 | |
93 | ||
19b27fa2 | 94 | /* default buffer size, used if the O/S won't supply a value. */ |
1be6b49c | 95 | static const size_t default_buffer_size = 1024; |
19b27fa2 | 96 | |
cb63cf9e JB |
97 | /* create FPORT buffer with specified sizes (or -1 to use default size or |
98 | 0 for no buffer. */ | |
99 | static void | |
c014a02e | 100 | scm_fport_buffer_add (SCM port, long read_size, int write_size) |
c6c79933 | 101 | #define FUNC_NAME "scm_fport_buffer_add" |
e145dd02 | 102 | { |
92c2555f | 103 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
e145dd02 | 104 | |
cb63cf9e JB |
105 | if (read_size == -1 || write_size == -1) |
106 | { | |
1be6b49c | 107 | size_t default_size; |
f47a5239 | 108 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e | 109 | struct stat st; |
b8b17bfd | 110 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 111 | |
19b27fa2 GH |
112 | default_size = (fstat (fp->fdes, &st) == -1) ? default_buffer_size |
113 | : st.st_blksize; | |
cb63cf9e | 114 | #else |
19b27fa2 | 115 | default_size = default_buffer_size; |
cb63cf9e JB |
116 | #endif |
117 | if (read_size == -1) | |
118 | read_size = default_size; | |
119 | if (write_size == -1) | |
120 | write_size = default_size; | |
121 | } | |
0f2d19dd | 122 | |
f5f2dcff | 123 | if (SCM_INPUT_PORT_P (port) && read_size > 0) |
cb63cf9e | 124 | { |
92d8fd32 | 125 | pt->read_buf = scm_gc_malloc_pointerless (read_size, "port buffer"); |
cb63cf9e JB |
126 | pt->read_pos = pt->read_end = pt->read_buf; |
127 | pt->read_buf_size = read_size; | |
128 | } | |
129 | else | |
130 | { | |
840ae05d | 131 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; |
cb63cf9e JB |
132 | pt->read_buf_size = 1; |
133 | } | |
1717856b | 134 | |
f5f2dcff | 135 | if (SCM_OUTPUT_PORT_P (port) && write_size > 0) |
cb63cf9e | 136 | { |
92d8fd32 | 137 | pt->write_buf = scm_gc_malloc_pointerless (write_size, "port buffer"); |
cb63cf9e JB |
138 | pt->write_pos = pt->write_buf; |
139 | pt->write_buf_size = write_size; | |
140 | } | |
141 | else | |
142 | { | |
143 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
144 | pt->write_buf_size = 1; | |
145 | } | |
146 | ||
147 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
148 | if (read_size > 0 || write_size > 0) | |
54778cd3 | 149 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0); |
cb63cf9e | 150 | else |
54778cd3 | 151 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUF0); |
7a6f1ffa | 152 | } |
c6c79933 | 153 | #undef FUNC_NAME |
7a6f1ffa | 154 | |
a1ec6916 | 155 | SCM_DEFINE (scm_setvbuf, "setvbuf", 2, 1, 0, |
1bbd0b84 | 156 | (SCM port, SCM mode, SCM size), |
fc0d72d4 MD |
157 | "Set the buffering mode for @var{port}. @var{mode} can be:\n" |
158 | "@table @code\n" | |
159 | "@item _IONBF\n" | |
160 | "non-buffered\n" | |
161 | "@item _IOLBF\n" | |
162 | "line buffered\n" | |
163 | "@item _IOFBF\n" | |
164 | "block buffered, using a newly allocated buffer of @var{size} bytes.\n" | |
165 | "If @var{size} is omitted, a default size will be used.\n" | |
2c1ae20e | 166 | "@end table") |
1bbd0b84 | 167 | #define FUNC_NAME s_scm_setvbuf |
7a6f1ffa | 168 | { |
1be6b49c | 169 | int cmode; |
c014a02e | 170 | long csize; |
92c2555f | 171 | scm_t_port *pt; |
7a6f1ffa | 172 | |
78446828 MV |
173 | port = SCM_COERCE_OUTPORT (port); |
174 | ||
3b3b36dd | 175 | SCM_VALIDATE_OPFPORT (1,port); |
a55c2b68 | 176 | cmode = scm_to_int (mode); |
d3639214 | 177 | if (cmode != _IONBF && cmode != _IOFBF && cmode != _IOLBF) |
1bbd0b84 | 178 | scm_out_of_range (FUNC_NAME, mode); |
d3639214 GH |
179 | |
180 | if (cmode == _IOLBF) | |
181 | { | |
54778cd3 | 182 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUFLINE); |
d3639214 GH |
183 | cmode = _IOFBF; |
184 | } | |
185 | else | |
186 | { | |
2b829bbb | 187 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~(scm_t_bits)SCM_BUFLINE); |
d3639214 GH |
188 | } |
189 | ||
7a6f1ffa | 190 | if (SCM_UNBNDP (size)) |
cb63cf9e JB |
191 | { |
192 | if (cmode == _IOFBF) | |
193 | csize = -1; | |
194 | else | |
195 | csize = 0; | |
196 | } | |
7a6f1ffa GH |
197 | else |
198 | { | |
a55c2b68 | 199 | csize = scm_to_int (size); |
cb63cf9e | 200 | if (csize < 0 || (cmode == _IONBF && csize > 0)) |
1bbd0b84 | 201 | scm_out_of_range (FUNC_NAME, size); |
7a6f1ffa | 202 | } |
d3639214 | 203 | |
cb63cf9e | 204 | pt = SCM_PTAB_ENTRY (port); |
7a6f1ffa | 205 | |
4c9419ac MV |
206 | /* silently discards buffered and put-back chars. */ |
207 | if (pt->read_buf == pt->putback_buf) | |
208 | { | |
209 | pt->read_buf = pt->saved_read_buf; | |
210 | pt->read_pos = pt->saved_read_pos; | |
211 | pt->read_end = pt->saved_read_end; | |
212 | pt->read_buf_size = pt->saved_read_buf_size; | |
213 | } | |
cb63cf9e | 214 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 215 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 216 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac | 217 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
7a6f1ffa | 218 | |
cb63cf9e JB |
219 | scm_fport_buffer_add (port, csize, csize); |
220 | return SCM_UNSPECIFIED; | |
0f2d19dd | 221 | } |
1bbd0b84 | 222 | #undef FUNC_NAME |
0f2d19dd | 223 | |
eadd48de | 224 | /* Move ports with the specified file descriptor to new descriptors, |
387d418c | 225 | * resetting the revealed count to 0. |
0f2d19dd | 226 | */ |
ee834df4 LC |
227 | static void |
228 | scm_i_evict_port (void *closure, SCM port) | |
0f2d19dd | 229 | { |
5dbc6c06 | 230 | int fd = * (int*) closure; |
0f2d19dd | 231 | |
5dbc6c06 | 232 | if (SCM_FPORTP (port)) |
eadd48de | 233 | { |
e9d8bc25 LC |
234 | scm_t_port *p; |
235 | scm_t_fport *fp; | |
236 | ||
237 | /* XXX: In some cases, we can encounter a port with no associated ptab | |
238 | entry. */ | |
239 | p = SCM_PTAB_ENTRY (port); | |
240 | fp = (p != NULL) ? (scm_t_fport *) p->stream : NULL; | |
cb63cf9e | 241 | |
e9d8bc25 | 242 | if ((fp != NULL) && (fp->fdes == fd)) |
eadd48de | 243 | { |
5dbc6c06 HWN |
244 | fp->fdes = dup (fd); |
245 | if (fp->fdes == -1) | |
246 | scm_syserror ("scm_evict_ports"); | |
247 | scm_set_port_revealed_x (port, scm_from_int (0)); | |
eadd48de GH |
248 | } |
249 | } | |
5dbc6c06 HWN |
250 | } |
251 | ||
252 | void | |
253 | scm_evict_ports (int fd) | |
254 | { | |
ee834df4 | 255 | scm_c_port_for_each (scm_i_evict_port, (void *) &fd); |
eadd48de | 256 | } |
0f2d19dd | 257 | |
efa40607 DH |
258 | |
259 | SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0, | |
260 | (SCM obj), | |
2069af38 | 261 | "Determine whether @var{obj} is a port that is related to a file.") |
efa40607 DH |
262 | #define FUNC_NAME s_scm_file_port_p |
263 | { | |
7888309b | 264 | return scm_from_bool (SCM_FPORTP (obj)); |
efa40607 DH |
265 | } |
266 | #undef FUNC_NAME | |
267 | ||
268 | ||
69cac238 | 269 | static SCM sys_file_port_name_canonicalization; |
0157a341 AW |
270 | SCM_SYMBOL (sym_relative, "relative"); |
271 | SCM_SYMBOL (sym_absolute, "absolute"); | |
272 | ||
273 | static SCM | |
274 | fport_canonicalize_filename (SCM filename) | |
275 | { | |
69cac238 AW |
276 | SCM mode = scm_fluid_ref (sys_file_port_name_canonicalization); |
277 | ||
0157a341 AW |
278 | if (!scm_is_string (filename)) |
279 | { | |
280 | return filename; | |
281 | } | |
69cac238 | 282 | else if (scm_is_eq (mode, sym_relative)) |
0157a341 | 283 | { |
22457d57 AW |
284 | SCM path, rel; |
285 | ||
286 | path = scm_variable_ref (scm_c_module_lookup (scm_the_root_module (), | |
287 | "%load-path")); | |
288 | rel = scm_i_relativize_path (filename, path); | |
289 | ||
290 | return scm_is_true (rel) ? rel : filename; | |
0157a341 | 291 | } |
69cac238 | 292 | else if (scm_is_eq (mode, sym_absolute)) |
0157a341 AW |
293 | { |
294 | char *str, *canon; | |
295 | ||
296 | str = scm_to_locale_string (filename); | |
297 | canon = canonicalize_file_name (str); | |
298 | free (str); | |
299 | ||
300 | return canon ? scm_take_locale_string (canon) : filename; | |
301 | } | |
302 | else | |
303 | { | |
304 | return filename; | |
305 | } | |
306 | } | |
307 | ||
308 | ||
0f2d19dd JB |
309 | /* scm_open_file |
310 | * Return a new port open on a given file. | |
311 | * | |
312 | * The mode string must match the pattern: [rwa+]** which | |
313 | * is interpreted in the usual unix way. | |
314 | * | |
315 | * Return the new port. | |
316 | */ | |
3b3b36dd | 317 | SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0, |
1e6808ea MG |
318 | (SCM filename, SCM mode), |
319 | "Open the file whose name is @var{filename}, and return a port\n" | |
fc0d72d4 | 320 | "representing that file. The attributes of the port are\n" |
1e6808ea MG |
321 | "determined by the @var{mode} string. The way in which this is\n" |
322 | "interpreted is similar to C stdio. The first character must be\n" | |
323 | "one of the following:\n" | |
fc0d72d4 MD |
324 | "@table @samp\n" |
325 | "@item r\n" | |
326 | "Open an existing file for input.\n" | |
327 | "@item w\n" | |
328 | "Open a file for output, creating it if it doesn't already exist\n" | |
329 | "or removing its contents if it does.\n" | |
330 | "@item a\n" | |
1e6808ea MG |
331 | "Open a file for output, creating it if it doesn't already\n" |
332 | "exist. All writes to the port will go to the end of the file.\n" | |
fc0d72d4 MD |
333 | "The \"append mode\" can be turned off while the port is in use\n" |
334 | "@pxref{Ports and File Descriptors, fcntl}\n" | |
1e6808ea MG |
335 | "@end table\n" |
336 | "The following additional characters can be appended:\n" | |
fc0d72d4 | 337 | "@table @samp\n" |
fc9c5d06 HWN |
338 | "@item b\n" |
339 | "Open the underlying file in binary mode, if supported by the operating system. " | |
fc0d72d4 MD |
340 | "@item +\n" |
341 | "Open the port for both input and output. E.g., @code{r+}: open\n" | |
342 | "an existing file for both input and output.\n" | |
343 | "@item 0\n" | |
1e6808ea MG |
344 | "Create an \"unbuffered\" port. In this case input and output\n" |
345 | "operations are passed directly to the underlying port\n" | |
346 | "implementation without additional buffering. This is likely to\n" | |
347 | "slow down I/O operations. The buffering mode can be changed\n" | |
348 | "while a port is in use @pxref{Ports and File Descriptors,\n" | |
349 | "setvbuf}\n" | |
fc0d72d4 MD |
350 | "@item l\n" |
351 | "Add line-buffering to the port. The port output buffer will be\n" | |
352 | "automatically flushed whenever a newline character is written.\n" | |
1e6808ea MG |
353 | "@end table\n" |
354 | "In theory we could create read/write ports which were buffered\n" | |
355 | "in one direction only. However this isn't included in the\n" | |
356 | "current interfaces. If a file cannot be opened with the access\n" | |
357 | "requested, @code{open-file} throws an exception.") | |
1bbd0b84 | 358 | #define FUNC_NAME s_scm_open_file |
0f2d19dd | 359 | { |
19639113 | 360 | SCM port; |
64e3a89c LC |
361 | int fdes, flags = 0; |
362 | unsigned int retries; | |
363 | char *file, *md, *ptr; | |
19639113 | 364 | |
661ae7ab | 365 | scm_dynwind_begin (0); |
19639113 | 366 | |
7f9994d9 | 367 | file = scm_to_locale_string (filename); |
661ae7ab | 368 | scm_dynwind_free (file); |
7f9994d9 MV |
369 | |
370 | md = scm_to_locale_string (mode); | |
661ae7ab | 371 | scm_dynwind_free (md); |
19639113 | 372 | |
1e6808ea | 373 | switch (*md) |
0f2d19dd | 374 | { |
cb63cf9e JB |
375 | case 'r': |
376 | flags |= O_RDONLY; | |
377 | break; | |
378 | case 'w': | |
379 | flags |= O_WRONLY | O_CREAT | O_TRUNC; | |
380 | break; | |
381 | case 'a': | |
382 | flags |= O_WRONLY | O_CREAT | O_APPEND; | |
383 | break; | |
384 | default: | |
1e6808ea | 385 | scm_out_of_range (FUNC_NAME, mode); |
0f2d19dd | 386 | } |
1e6808ea | 387 | ptr = md + 1; |
cb63cf9e | 388 | while (*ptr != '\0') |
e145dd02 | 389 | { |
cb63cf9e JB |
390 | switch (*ptr) |
391 | { | |
392 | case '+': | |
393 | flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR; | |
394 | break; | |
9f561420 GH |
395 | case 'b': |
396 | #if defined (O_BINARY) | |
397 | flags |= O_BINARY; | |
398 | #endif | |
399 | break; | |
cb63cf9e | 400 | case '0': /* unbuffered: handled later. */ |
d3639214 | 401 | case 'l': /* line buffered: handled during output. */ |
cb63cf9e JB |
402 | break; |
403 | default: | |
1e6808ea | 404 | scm_out_of_range (FUNC_NAME, mode); |
cb63cf9e JB |
405 | } |
406 | ptr++; | |
e145dd02 | 407 | } |
cb63cf9e | 408 | |
64e3a89c LC |
409 | for (retries = 0, fdes = -1; |
410 | fdes < 0 && retries < 2; | |
411 | retries++) | |
412 | { | |
413 | SCM_SYSCALL (fdes = open_or_open64 (file, flags, 0666)); | |
414 | if (fdes == -1) | |
415 | { | |
416 | int en = errno; | |
417 | ||
418 | if (en == EMFILE && retries == 0) | |
419 | /* Run the GC in case it collects open file ports that are no | |
420 | longer referenced. */ | |
421 | scm_i_gc (FUNC_NAME); | |
422 | else | |
423 | SCM_SYSERROR_MSG ("~A: ~S", | |
424 | scm_cons (scm_strerror (scm_from_int (en)), | |
425 | scm_cons (filename, SCM_EOL)), en); | |
426 | } | |
0f2d19dd | 427 | } |
64e3a89c | 428 | |
0157a341 AW |
429 | port = scm_i_fdes_to_port (fdes, scm_i_mode_bits (mode), |
430 | fport_canonicalize_filename (filename)); | |
7f9994d9 | 431 | |
661ae7ab | 432 | scm_dynwind_end (); |
7f9994d9 | 433 | |
0f2d19dd JB |
434 | return port; |
435 | } | |
1bbd0b84 | 436 | #undef FUNC_NAME |
0f2d19dd | 437 | |
e145dd02 | 438 | \f |
82893676 MG |
439 | #ifdef __MINGW32__ |
440 | /* | |
441 | * Try getting the appropiate file flags for a given file descriptor | |
442 | * under Windows. This incorporates some fancy operations because Windows | |
443 | * differentiates between file, pipe and socket descriptors. | |
444 | */ | |
445 | #ifndef O_ACCMODE | |
446 | # define O_ACCMODE 0x0003 | |
447 | #endif | |
448 | ||
449 | static int getflags (int fdes) | |
450 | { | |
451 | int flags = 0; | |
452 | struct stat buf; | |
453 | int error, optlen = sizeof (int); | |
454 | ||
455 | /* Is this a socket ? */ | |
456 | if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0) | |
457 | flags = O_RDWR; | |
458 | /* Maybe a regular file ? */ | |
459 | else if (fstat (fdes, &buf) < 0) | |
460 | flags = -1; | |
461 | else | |
462 | { | |
463 | /* Or an anonymous pipe handle ? */ | |
b8b17bfd | 464 | if (buf.st_mode & _S_IFIFO) |
8f99e3f3 SJ |
465 | flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0, |
466 | NULL, NULL, NULL) ? O_RDONLY : O_WRONLY; | |
82893676 | 467 | /* stdin ? */ |
b8b17bfd | 468 | else if (fdes == fileno (stdin) && isatty (fdes)) |
82893676 MG |
469 | flags = O_RDONLY; |
470 | /* stdout / stderr ? */ | |
b8b17bfd MV |
471 | else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) && |
472 | isatty (fdes)) | |
82893676 MG |
473 | flags = O_WRONLY; |
474 | else | |
475 | flags = buf.st_mode; | |
476 | } | |
477 | return flags; | |
478 | } | |
479 | #endif /* __MINGW32__ */ | |
480 | ||
cb63cf9e | 481 | /* Building Guile ports from a file descriptor. */ |
e145dd02 | 482 | |
cb63cf9e | 483 | /* Build a Scheme port from an open file descriptor `fdes'. |
a089567e JB |
484 | MODE indicates whether FILE is open for reading or writing; it uses |
485 | the same notation as open-file's second argument. | |
19b27fa2 GH |
486 | NAME is a string to be used as the port's filename. |
487 | */ | |
a089567e | 488 | SCM |
d617ee18 | 489 | scm_i_fdes_to_port (int fdes, long mode_bits, SCM name) |
19b27fa2 | 490 | #define FUNC_NAME "scm_fdes_to_port" |
a089567e | 491 | { |
a089567e | 492 | SCM port; |
92c2555f | 493 | scm_t_port *pt; |
19b27fa2 GH |
494 | int flags; |
495 | ||
496 | /* test that fdes is valid. */ | |
82893676 MG |
497 | #ifdef __MINGW32__ |
498 | flags = getflags (fdes); | |
499 | #else | |
19b27fa2 | 500 | flags = fcntl (fdes, F_GETFL, 0); |
82893676 | 501 | #endif |
19b27fa2 GH |
502 | if (flags == -1) |
503 | SCM_SYSERROR; | |
504 | flags &= O_ACCMODE; | |
505 | if (flags != O_RDWR | |
506 | && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG)) | |
507 | || (flags != O_RDONLY && (mode_bits & SCM_RDNG)))) | |
508 | { | |
509 | SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL); | |
510 | } | |
a089567e | 511 | |
9de87eea | 512 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
da220f27 HWN |
513 | |
514 | port = scm_new_port_table_entry (scm_tc16_fport); | |
515 | SCM_SET_CELL_TYPE(port, scm_tc16_fport | mode_bits); | |
516 | pt = SCM_PTAB_ENTRY(port); | |
a089567e | 517 | { |
92c2555f | 518 | scm_t_fport *fp |
92d8fd32 LC |
519 | = (scm_t_fport *) scm_gc_malloc_pointerless (sizeof (scm_t_fport), |
520 | "file port"); | |
c6c79933 | 521 | |
cb63cf9e | 522 | fp->fdes = fdes; |
0de97b83 | 523 | pt->rw_random = SCM_FDES_RANDOM_P (fdes); |
cb63cf9e JB |
524 | SCM_SETSTREAM (port, fp); |
525 | if (mode_bits & SCM_BUF0) | |
526 | scm_fport_buffer_add (port, 0, 0); | |
527 | else | |
528 | scm_fport_buffer_add (port, -1, -1); | |
a089567e | 529 | } |
b24b5e13 | 530 | SCM_SET_FILENAME (port, name); |
9de87eea | 531 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
e145dd02 JB |
532 | return port; |
533 | } | |
19b27fa2 | 534 | #undef FUNC_NAME |
e145dd02 | 535 | |
d617ee18 MV |
536 | SCM |
537 | scm_fdes_to_port (int fdes, char *mode, SCM name) | |
538 | { | |
539 | return scm_i_fdes_to_port (fdes, scm_mode_bits (mode), name); | |
540 | } | |
541 | ||
affc96b5 | 542 | /* Return a lower bound on the number of bytes available for input. */ |
cb63cf9e | 543 | static int |
affc96b5 | 544 | fport_input_waiting (SCM port) |
e145dd02 | 545 | { |
cb63cf9e | 546 | #ifdef HAVE_SELECT |
23f2b9a3 | 547 | int fdes = SCM_FSTREAM (port)->fdes; |
cb63cf9e JB |
548 | struct timeval timeout; |
549 | SELECT_TYPE read_set; | |
550 | SELECT_TYPE write_set; | |
551 | SELECT_TYPE except_set; | |
552 | ||
553 | FD_ZERO (&read_set); | |
554 | FD_ZERO (&write_set); | |
555 | FD_ZERO (&except_set); | |
556 | ||
557 | FD_SET (fdes, &read_set); | |
558 | ||
559 | timeout.tv_sec = 0; | |
560 | timeout.tv_usec = 0; | |
561 | ||
562 | if (select (SELECT_SET_SIZE, | |
563 | &read_set, &write_set, &except_set, &timeout) | |
564 | < 0) | |
affc96b5 GH |
565 | scm_syserror ("fport_input_waiting"); |
566 | return FD_ISSET (fdes, &read_set) ? 1 : 0; | |
23f2b9a3 KR |
567 | |
568 | #elif HAVE_IOCTL && defined (FIONREAD) | |
569 | /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD | |
570 | (for use with winsock ioctlsocket()) but not ioctl(). */ | |
571 | int fdes = SCM_FSTREAM (port)->fdes; | |
cb63cf9e JB |
572 | int remir; |
573 | ioctl(fdes, FIONREAD, &remir); | |
574 | return remir; | |
23f2b9a3 | 575 | |
cb63cf9e | 576 | #else |
affc96b5 | 577 | scm_misc_error ("fport_input_waiting", |
cb63cf9e JB |
578 | "Not fully implemented on this platform", |
579 | SCM_EOL); | |
580 | #endif | |
a089567e JB |
581 | } |
582 | ||
cb63cf9e | 583 | \f |
0f2d19dd | 584 | static int |
e81d98ec | 585 | fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 586 | { |
b3ec3c64 MD |
587 | scm_puts ("#<", port); |
588 | scm_print_port_mode (exp, port); | |
589 | if (SCM_OPFPORTP (exp)) | |
0f2d19dd | 590 | { |
b3ec3c64 | 591 | int fdes; |
b24b5e13 | 592 | SCM name = SCM_FILENAME (exp); |
cc95e00a | 593 | if (scm_is_string (name) || scm_is_symbol (name)) |
b24b5e13 DH |
594 | scm_display (name, port); |
595 | else | |
596 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); | |
b3ec3c64 MD |
597 | scm_putc (' ', port); |
598 | fdes = (SCM_FSTREAM (exp))->fdes; | |
599 | ||
82893676 | 600 | #ifdef HAVE_TTYNAME |
b3ec3c64 | 601 | if (isatty (fdes)) |
eb372585 | 602 | scm_display (scm_ttyname (exp), port); |
b3ec3c64 | 603 | else |
82893676 | 604 | #endif /* HAVE_TTYNAME */ |
b3ec3c64 | 605 | scm_intprint (fdes, 10, port); |
0f2d19dd JB |
606 | } |
607 | else | |
608 | { | |
b3ec3c64 MD |
609 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); |
610 | scm_putc (' ', port); | |
0345e278 | 611 | scm_uintprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port); |
0f2d19dd | 612 | } |
b3ec3c64 MD |
613 | scm_putc ('>', port); |
614 | return 1; | |
0f2d19dd JB |
615 | } |
616 | ||
2e945bcc | 617 | #ifndef __MINGW32__ |
cb63cf9e JB |
618 | /* thread-local block for input on fport's fdes. */ |
619 | static void | |
620 | fport_wait_for_input (SCM port) | |
3cb988bd | 621 | { |
cb63cf9e | 622 | int fdes = SCM_FSTREAM (port)->fdes; |
3cb988bd | 623 | |
affc96b5 | 624 | if (!fport_input_waiting (port)) |
8122b543 | 625 | { |
cb63cf9e JB |
626 | int n; |
627 | SELECT_TYPE readfds; | |
628 | int flags = fcntl (fdes, F_GETFL); | |
629 | ||
630 | if (flags == -1) | |
631 | scm_syserror ("scm_fdes_wait_for_input"); | |
632 | if (!(flags & O_NONBLOCK)) | |
633 | do | |
634 | { | |
635 | FD_ZERO (&readfds); | |
636 | FD_SET (fdes, &readfds); | |
9de87eea | 637 | n = scm_std_select (fdes + 1, &readfds, NULL, NULL, NULL); |
cb63cf9e JB |
638 | } |
639 | while (n == -1 && errno == EINTR); | |
8122b543 | 640 | } |
3cb988bd | 641 | } |
2e945bcc | 642 | #endif /* !__MINGW32__ */ |
0f2d19dd | 643 | |
affc96b5 | 644 | static void fport_flush (SCM port); |
0f2d19dd | 645 | |
c2da2648 GH |
646 | /* fill a port's read-buffer with a single read. returns the first |
647 | char or EOF if end of file. */ | |
889975e5 | 648 | static scm_t_wchar |
affc96b5 | 649 | fport_fill_input (SCM port) |
0f2d19dd | 650 | { |
c014a02e | 651 | long count; |
92c2555f MV |
652 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
653 | scm_t_fport *fp = SCM_FSTREAM (port); | |
cb63cf9e | 654 | |
2e945bcc | 655 | #ifndef __MINGW32__ |
cb63cf9e | 656 | fport_wait_for_input (port); |
2e945bcc | 657 | #endif /* !__MINGW32__ */ |
cb63cf9e JB |
658 | SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size)); |
659 | if (count == -1) | |
affc96b5 | 660 | scm_syserror ("fport_fill_input"); |
cb63cf9e | 661 | if (count == 0) |
889975e5 | 662 | return (scm_t_wchar) EOF; |
cb63cf9e JB |
663 | else |
664 | { | |
5c070ca7 | 665 | pt->read_pos = pt->read_buf; |
cb63cf9e | 666 | pt->read_end = pt->read_buf + count; |
5c070ca7 | 667 | return *pt->read_buf; |
cb63cf9e | 668 | } |
0f2d19dd JB |
669 | } |
670 | ||
0a94eb00 LC |
671 | static scm_t_off |
672 | fport_seek (SCM port, scm_t_off offset, int whence) | |
0f2d19dd | 673 | { |
92c2555f MV |
674 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
675 | scm_t_fport *fp = SCM_FSTREAM (port); | |
8ab3d8a0 KR |
676 | off_t_or_off64_t rv; |
677 | off_t_or_off64_t result; | |
7dcb364d GH |
678 | |
679 | if (pt->rw_active == SCM_PORT_WRITE) | |
680 | { | |
681 | if (offset != 0 || whence != SEEK_CUR) | |
682 | { | |
683 | fport_flush (port); | |
8ab3d8a0 | 684 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
685 | } |
686 | else | |
687 | { | |
688 | /* read current position without disturbing the buffer. */ | |
8ab3d8a0 | 689 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
690 | result = rv + (pt->write_pos - pt->write_buf); |
691 | } | |
692 | } | |
693 | else if (pt->rw_active == SCM_PORT_READ) | |
694 | { | |
695 | if (offset != 0 || whence != SEEK_CUR) | |
696 | { | |
697 | /* could expand to avoid a second seek. */ | |
698 | scm_end_input (port); | |
8ab3d8a0 | 699 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
700 | } |
701 | else | |
702 | { | |
703 | /* read current position without disturbing the buffer | |
704 | (particularly the unread-char buffer). */ | |
8ab3d8a0 | 705 | rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d GH |
706 | result = rv - (pt->read_end - pt->read_pos); |
707 | ||
708 | if (pt->read_buf == pt->putback_buf) | |
709 | result -= pt->saved_read_end - pt->saved_read_pos; | |
710 | } | |
711 | } | |
712 | else /* SCM_PORT_NEITHER */ | |
713 | { | |
8ab3d8a0 | 714 | result = rv = lseek_or_lseek64 (fp->fdes, offset, whence); |
7dcb364d | 715 | } |
cb8dfa3f | 716 | |
7dcb364d | 717 | if (rv == -1) |
affc96b5 | 718 | scm_syserror ("fport_seek"); |
7dcb364d | 719 | |
cb8dfa3f | 720 | return result; |
0f2d19dd JB |
721 | } |
722 | ||
840ae05d | 723 | static void |
f1ce9199 | 724 | fport_truncate (SCM port, scm_t_off length) |
840ae05d | 725 | { |
92c2555f | 726 | scm_t_fport *fp = SCM_FSTREAM (port); |
840ae05d JB |
727 | |
728 | if (ftruncate (fp->fdes, length) == -1) | |
729 | scm_syserror ("ftruncate"); | |
730 | } | |
731 | ||
31703ab8 | 732 | static void |
8aa011a1 | 733 | fport_write (SCM port, const void *data, size_t size) |
daa4a3f1 | 734 | #define FUNC_NAME "fport_write" |
31703ab8 | 735 | { |
0c6d2191 | 736 | /* this procedure tries to minimize the number of writes/flushes. */ |
92c2555f | 737 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
31703ab8 | 738 | |
0c6d2191 GH |
739 | if (pt->write_buf == &pt->shortbuf |
740 | || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size)) | |
31703ab8 | 741 | { |
daa4a3f1 LC |
742 | /* Unbuffered port, or port with empty buffer and data won't fit in |
743 | buffer. */ | |
744 | if (full_write (SCM_FPORT_FDES (port), data, size) < size) | |
745 | SCM_SYSERROR; | |
746 | ||
0c6d2191 | 747 | return; |
31703ab8 | 748 | } |
d3639214 | 749 | |
0c6d2191 | 750 | { |
f1ce9199 | 751 | scm_t_off space = pt->write_end - pt->write_pos; |
0c6d2191 GH |
752 | |
753 | if (size <= space) | |
754 | { | |
755 | /* data fits in buffer. */ | |
756 | memcpy (pt->write_pos, data, size); | |
757 | pt->write_pos += size; | |
758 | if (pt->write_pos == pt->write_end) | |
759 | { | |
affc96b5 | 760 | fport_flush (port); |
0c6d2191 GH |
761 | /* we can skip the line-buffering check if nothing's buffered. */ |
762 | return; | |
763 | } | |
764 | } | |
765 | else | |
766 | { | |
767 | memcpy (pt->write_pos, data, space); | |
768 | pt->write_pos = pt->write_end; | |
769 | fport_flush (port); | |
770 | { | |
771 | const void *ptr = ((const char *) data) + space; | |
772 | size_t remaining = size - space; | |
773 | ||
774 | if (size >= pt->write_buf_size) | |
775 | { | |
daa4a3f1 LC |
776 | if (full_write (SCM_FPORT_FDES (port), ptr, remaining) |
777 | < remaining) | |
778 | SCM_SYSERROR; | |
0c6d2191 GH |
779 | return; |
780 | } | |
781 | else | |
782 | { | |
783 | memcpy (pt->write_pos, ptr, remaining); | |
784 | pt->write_pos += remaining; | |
785 | } | |
31703ab8 | 786 | } |
0c6d2191 | 787 | } |
31703ab8 | 788 | |
0c6d2191 GH |
789 | /* handle line buffering. */ |
790 | if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size)) | |
791 | fport_flush (port); | |
792 | } | |
31703ab8 | 793 | } |
daa4a3f1 | 794 | #undef FUNC_NAME |
31703ab8 | 795 | |
cb63cf9e | 796 | static void |
affc96b5 | 797 | fport_flush (SCM port) |
0f2d19dd | 798 | { |
92c2555f MV |
799 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
800 | scm_t_fport *fp = SCM_FSTREAM (port); | |
6f760c1d | 801 | unsigned char *ptr = pt->write_buf; |
c014a02e ML |
802 | long init_size = pt->write_pos - pt->write_buf; |
803 | long remaining = init_size; | |
0f2d19dd | 804 | |
cb63cf9e JB |
805 | while (remaining > 0) |
806 | { | |
c014a02e | 807 | long count; |
cb63cf9e JB |
808 | |
809 | SCM_SYSCALL (count = write (fp->fdes, ptr, remaining)); | |
810 | if (count < 0) | |
811 | { | |
812 | /* error. assume nothing was written this call, but | |
813 | fix up the buffer for any previous successful writes. */ | |
c014a02e | 814 | long done = init_size - remaining; |
cb63cf9e JB |
815 | |
816 | if (done > 0) | |
817 | { | |
818 | int i; | |
819 | ||
820 | for (i = 0; i < remaining; i++) | |
821 | { | |
822 | *(pt->write_buf + i) = *(pt->write_buf + done + i); | |
823 | } | |
824 | pt->write_pos = pt->write_buf + remaining; | |
825 | } | |
65c7a8bd | 826 | if (scm_gc_running_p) |
6b72ac1d GH |
827 | { |
828 | /* silently ignore the error. scm_error would abort if we | |
829 | called it now. */ | |
830 | count = remaining; | |
831 | } | |
832 | else | |
833 | scm_syserror ("fport_flush"); | |
cb63cf9e JB |
834 | } |
835 | ptr += count; | |
836 | remaining -= count; | |
837 | } | |
838 | pt->write_pos = pt->write_buf; | |
61e452ba | 839 | pt->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
840 | } |
841 | ||
283a1a0e | 842 | /* clear the read buffer and adjust the file position for unread bytes. */ |
840ae05d | 843 | static void |
affc96b5 | 844 | fport_end_input (SCM port, int offset) |
840ae05d | 845 | { |
92c2555f MV |
846 | scm_t_fport *fp = SCM_FSTREAM (port); |
847 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
283a1a0e GH |
848 | |
849 | offset += pt->read_end - pt->read_pos; | |
840ae05d | 850 | |
840ae05d JB |
851 | if (offset > 0) |
852 | { | |
853 | pt->read_pos = pt->read_end; | |
854 | /* will throw error if unread-char used at beginning of file | |
855 | then attempting to write. seems correct. */ | |
856 | if (lseek (fp->fdes, -offset, SEEK_CUR) == -1) | |
affc96b5 | 857 | scm_syserror ("fport_end_input"); |
840ae05d | 858 | } |
61e452ba | 859 | pt->rw_active = SCM_PORT_NEITHER; |
8f29fbd0 JB |
860 | } |
861 | ||
6a2c4c81 | 862 | static int |
affc96b5 | 863 | fport_close (SCM port) |
6a2c4c81 | 864 | { |
92c2555f MV |
865 | scm_t_fport *fp = SCM_FSTREAM (port); |
866 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
cb63cf9e | 867 | int rv; |
840ae05d | 868 | |
affc96b5 | 869 | fport_flush (port); |
cb63cf9e JB |
870 | SCM_SYSCALL (rv = close (fp->fdes)); |
871 | if (rv == -1 && errno != EBADF) | |
6b72ac1d GH |
872 | { |
873 | if (scm_gc_running_p) | |
874 | /* silently ignore the error. scm_error would abort if we | |
875 | called it now. */ | |
876 | ; | |
877 | else | |
878 | scm_syserror ("fport_close"); | |
879 | } | |
6c951427 GH |
880 | if (pt->read_buf == pt->putback_buf) |
881 | pt->read_buf = pt->saved_read_buf; | |
cb63cf9e | 882 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 883 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 884 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac MV |
885 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
886 | scm_gc_free (fp, sizeof (*fp), "file port"); | |
cb63cf9e | 887 | return rv; |
6a2c4c81 JB |
888 | } |
889 | ||
1be6b49c | 890 | static size_t |
affc96b5 | 891 | fport_free (SCM port) |
b3ec3c64 | 892 | { |
affc96b5 | 893 | fport_close (port); |
b3ec3c64 MD |
894 | return 0; |
895 | } | |
896 | ||
92c2555f | 897 | static scm_t_bits |
b3ec3c64 MD |
898 | scm_make_fptob () |
899 | { | |
92c2555f | 900 | scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write); |
a98bddfd | 901 | |
affc96b5 | 902 | scm_set_port_free (tc, fport_free); |
e841c3e0 | 903 | scm_set_port_print (tc, fport_print); |
affc96b5 GH |
904 | scm_set_port_flush (tc, fport_flush); |
905 | scm_set_port_end_input (tc, fport_end_input); | |
906 | scm_set_port_close (tc, fport_close); | |
907 | scm_set_port_seek (tc, fport_seek); | |
908 | scm_set_port_truncate (tc, fport_truncate); | |
909 | scm_set_port_input_waiting (tc, fport_input_waiting); | |
a98bddfd DH |
910 | |
911 | return tc; | |
b3ec3c64 | 912 | } |
0f2d19dd | 913 | |
0f2d19dd JB |
914 | void |
915 | scm_init_fports () | |
0f2d19dd | 916 | { |
a98bddfd DH |
917 | scm_tc16_fport = scm_make_fptob (); |
918 | ||
e11e83f3 MV |
919 | scm_c_define ("_IOFBF", scm_from_int (_IOFBF)); |
920 | scm_c_define ("_IOLBF", scm_from_int (_IOLBF)); | |
921 | scm_c_define ("_IONBF", scm_from_int (_IONBF)); | |
a98bddfd | 922 | |
69cac238 AW |
923 | sys_file_port_name_canonicalization = scm_make_fluid (); |
924 | scm_c_define ("%file-port-name-canonicalization", | |
925 | sys_file_port_name_canonicalization); | |
926 | ||
a98bddfd | 927 | #include "libguile/fports.x" |
0f2d19dd | 928 | } |
89e00824 ML |
929 | |
930 | /* | |
931 | Local Variables: | |
932 | c-file-style: "gnu" | |
933 | End: | |
934 | */ |