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6d36532c | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program 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 | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 | 41 | |
1bbd0b84 | 42 | |
0f2d19dd JB |
43 | \f |
44 | ||
381534b3 RB |
45 | #if HAVE_CONFIG_H |
46 | # include <config.h> | |
47 | #endif | |
48 | ||
7beabedb | 49 | #include <stdio.h> |
e6e2e95a MD |
50 | #include <errno.h> |
51 | ||
a0599745 | 52 | #include "libguile/_scm.h" |
6d36532c | 53 | #include "libguile/ioext.h" |
a0599745 | 54 | #include "libguile/fports.h" |
a0599745 | 55 | #include "libguile/feature.h" |
6d36532c | 56 | #include "libguile/ports.h" |
a0599745 | 57 | #include "libguile/strings.h" |
a0599745 | 58 | #include "libguile/validate.h" |
0f2d19dd | 59 | |
ee149d03 JB |
60 | #include <fcntl.h> |
61 | ||
ec65f5da MV |
62 | #ifdef HAVE_IO_H |
63 | #include <io.h> | |
64 | #endif | |
95b88819 GH |
65 | #ifdef HAVE_UNISTD_H |
66 | #include <unistd.h> | |
67 | #endif | |
0f2d19dd JB |
68 | \f |
69 | ||
a1ec6916 | 70 | SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0, |
1e6808ea MG |
71 | (SCM fd_port), |
72 | "Return an integer representing the current position of\n" | |
73 | "@var{fd/port}, measured from the beginning. Equivalent to:\n" | |
74 | "\n" | |
75 | "@lisp\n" | |
b380b885 | 76 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 77 | "@end lisp") |
1bbd0b84 | 78 | #define FUNC_NAME s_scm_ftell |
0f2d19dd | 79 | { |
1e6808ea | 80 | return scm_seek (fd_port, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
ee149d03 | 81 | } |
1bbd0b84 | 82 | #undef FUNC_NAME |
0f2d19dd | 83 | |
a1ec6916 | 84 | SCM_DEFINE (scm_redirect_port, "redirect-port", 2, 0, 0, |
1bbd0b84 | 85 | (SCM old, SCM new), |
b380b885 MD |
86 | "This procedure takes two ports and duplicates the underlying file\n" |
87 | "descriptor from @var{old-port} into @var{new-port}. The\n" | |
88 | "current file descriptor in @var{new-port} will be closed.\n" | |
89 | "After the redirection the two ports will share a file position\n" | |
90 | "and file status flags.\n\n" | |
91 | "The return value is unspecified.\n\n" | |
92 | "Unexpected behaviour can result if both ports are subsequently used\n" | |
93 | "and the original and/or duplicate ports are buffered.\n\n" | |
94 | "This procedure does not have any side effects on other ports or\n" | |
95 | "revealed counts.") | |
1bbd0b84 | 96 | #define FUNC_NAME s_scm_redirect_port |
0f2d19dd JB |
97 | { |
98 | int ans, oldfd, newfd; | |
92c2555f | 99 | scm_t_fport *fp; |
9c29ac66 | 100 | |
78446828 MV |
101 | old = SCM_COERCE_OUTPORT (old); |
102 | new = SCM_COERCE_OUTPORT (new); | |
1bbd0b84 | 103 | |
34d19ef6 HWN |
104 | SCM_VALIDATE_OPFPORT (1, old); |
105 | SCM_VALIDATE_OPFPORT (2, new); | |
ee149d03 JB |
106 | oldfd = SCM_FPORT_FDES (old); |
107 | fp = SCM_FSTREAM (new); | |
108 | newfd = fp->fdes; | |
109 | if (oldfd != newfd) | |
110 | { | |
92c2555f MV |
111 | scm_t_port *pt = SCM_PTAB_ENTRY (new); |
112 | scm_t_port *old_pt = SCM_PTAB_ENTRY (old); | |
113 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)]; | |
afc5764c JB |
114 | |
115 | /* must flush to old fdes. */ | |
116 | if (pt->rw_active == SCM_PORT_WRITE) | |
affc96b5 | 117 | ptob->flush (new); |
afc5764c | 118 | else if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 119 | scm_end_input (new); |
ee149d03 JB |
120 | ans = dup2 (oldfd, newfd); |
121 | if (ans == -1) | |
1bbd0b84 | 122 | SCM_SYSERROR; |
afc5764c | 123 | pt->rw_random = old_pt->rw_random; |
ee149d03 | 124 | /* continue using existing buffers, even if inappropriate. */ |
ee149d03 | 125 | } |
02b754d3 | 126 | return SCM_UNSPECIFIED; |
0f2d19dd | 127 | } |
1bbd0b84 | 128 | #undef FUNC_NAME |
0f2d19dd | 129 | |
a1ec6916 | 130 | SCM_DEFINE (scm_dup_to_fdes, "dup->fdes", 1, 1, 0, |
1bbd0b84 | 131 | (SCM fd_or_port, SCM fd), |
1e6808ea MG |
132 | "Return a new integer file descriptor referring to the open file\n" |
133 | "designated by @var{fd_or_port}, which must be either an open\n" | |
134 | "file port or a file descriptor.") | |
1bbd0b84 | 135 | #define FUNC_NAME s_scm_dup_to_fdes |
a9488d12 GH |
136 | { |
137 | int oldfd, newfd, rv; | |
138 | ||
78446828 MV |
139 | fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); |
140 | ||
a9488d12 GH |
141 | if (SCM_INUMP (fd_or_port)) |
142 | oldfd = SCM_INUM (fd_or_port); | |
143 | else | |
144 | { | |
34d19ef6 | 145 | SCM_VALIDATE_OPFPORT (1, fd_or_port); |
ee149d03 | 146 | oldfd = SCM_FPORT_FDES (fd_or_port); |
a9488d12 | 147 | } |
7a6f1ffa GH |
148 | |
149 | if (SCM_UNBNDP (fd)) | |
e38303a2 | 150 | { |
ee149d03 | 151 | newfd = dup (oldfd); |
7a6f1ffa | 152 | if (newfd == -1) |
1bbd0b84 | 153 | SCM_SYSERROR; |
7a6f1ffa GH |
154 | fd = SCM_MAKINUM (newfd); |
155 | } | |
156 | else | |
157 | { | |
c1bfcf60 | 158 | SCM_VALIDATE_INUM_COPY (2, fd, newfd); |
7a6f1ffa GH |
159 | if (oldfd != newfd) |
160 | { | |
161 | scm_evict_ports (newfd); /* see scsh manual. */ | |
ee149d03 | 162 | rv = dup2 (oldfd, newfd); |
7a6f1ffa | 163 | if (rv == -1) |
1bbd0b84 | 164 | SCM_SYSERROR; |
7a6f1ffa | 165 | } |
e38303a2 | 166 | } |
e38303a2 | 167 | return fd; |
a9488d12 | 168 | } |
1bbd0b84 | 169 | #undef FUNC_NAME |
a9488d12 | 170 | |
34526073 | 171 | |
c2ca4493 GH |
172 | SCM_DEFINE (scm_dup2, "dup2", 2, 0, 0, |
173 | (SCM oldfd, SCM newfd), | |
174 | "A simple wrapper for the @code{dup2} system call.\n" | |
175 | "Copies the file descriptor @var{oldfd} to descriptor\n" | |
176 | "number @var{newfd}, replacing the previous meaning\n" | |
177 | "of @var{newfd}. Both @var{oldfd} and @var{newfd} must\n" | |
178 | "be integers.\n" | |
179 | "Unlike for dup->fdes or primitive-move->fdes, no attempt\n" | |
34526073 | 180 | "is made to move away ports which are using @var{newfd}.\n" |
c2ca4493 GH |
181 | "The return value is unspecified.") |
182 | #define FUNC_NAME s_scm_dup2 | |
183 | { | |
184 | int c_oldfd; | |
185 | int c_newfd; | |
186 | int rv; | |
187 | ||
188 | SCM_VALIDATE_INUM_COPY (1, oldfd, c_oldfd); | |
189 | SCM_VALIDATE_INUM_COPY (2, newfd, c_newfd); | |
190 | rv = dup2 (c_oldfd, c_newfd); | |
191 | if (rv == -1) | |
192 | SCM_SYSERROR; | |
193 | return SCM_UNSPECIFIED; | |
194 | } | |
195 | #undef FUNC_NAME | |
196 | ||
a1ec6916 | 197 | SCM_DEFINE (scm_fileno, "fileno", 1, 0, 0, |
1bbd0b84 | 198 | (SCM port), |
1e6808ea MG |
199 | "Return the integer file descriptor underlying @var{port}. Does\n" |
200 | "not change its revealed count.") | |
1bbd0b84 | 201 | #define FUNC_NAME s_scm_fileno |
0f2d19dd | 202 | { |
78446828 | 203 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 204 | SCM_VALIDATE_OPFPORT (1, port); |
ee149d03 | 205 | return SCM_MAKINUM (SCM_FPORT_FDES (port)); |
0f2d19dd | 206 | } |
1bbd0b84 GB |
207 | #undef FUNC_NAME |
208 | ||
209 | /* GJB:FIXME:: why does this not throw | |
210 | an error if the arg is not a port? | |
211 | This proc as is would be better names isattyport? | |
1be6b49c ML |
212 | if it is not going to assume that the arg is a port |
213 | ||
214 | [cmm] I don't see any problem with the above. why should a type | |
215 | predicate assume _anything_ about its argument? | |
216 | */ | |
a1ec6916 | 217 | SCM_DEFINE (scm_isatty_p, "isatty?", 1, 0, 0, |
1bbd0b84 | 218 | (SCM port), |
1e6808ea MG |
219 | "Return @code{#t} if @var{port} is using a serial non--file\n" |
220 | "device, otherwise @code{#f}.") | |
1bbd0b84 | 221 | #define FUNC_NAME s_scm_isatty_p |
0f2d19dd JB |
222 | { |
223 | int rv; | |
78446828 MV |
224 | |
225 | port = SCM_COERCE_OUTPORT (port); | |
226 | ||
0c95b57d | 227 | if (!SCM_OPFPORTP (port)) |
10ccfad7 | 228 | return SCM_BOOL_F; |
ee149d03 JB |
229 | |
230 | rv = isatty (SCM_FPORT_FDES (port)); | |
1bbd0b84 | 231 | return SCM_BOOL(rv); |
0f2d19dd | 232 | } |
1bbd0b84 | 233 | #undef FUNC_NAME |
0f2d19dd JB |
234 | |
235 | ||
236 | ||
a1ec6916 | 237 | SCM_DEFINE (scm_fdopen, "fdopen", 2, 0, 0, |
1bbd0b84 | 238 | (SCM fdes, SCM modes), |
1e6808ea MG |
239 | "Return a new port based on the file descriptor @var{fdes}.\n" |
240 | "Modes are given by the string @var{modes}. The revealed count\n" | |
241 | "of the port is initialized to zero. The modes string is the\n" | |
242 | "same as that accepted by @ref{File Ports, open-file}.") | |
1bbd0b84 | 243 | #define FUNC_NAME s_scm_fdopen |
0f2d19dd | 244 | { |
34d19ef6 | 245 | SCM_VALIDATE_INUM (1, fdes); |
a6d9e5ab | 246 | SCM_VALIDATE_STRING (2, modes); |
19b27fa2 | 247 | |
a6d9e5ab | 248 | return scm_fdes_to_port (SCM_INUM (fdes), SCM_STRING_CHARS (modes), SCM_BOOL_F); |
0f2d19dd | 249 | } |
1bbd0b84 | 250 | #undef FUNC_NAME |
0f2d19dd JB |
251 | |
252 | ||
253 | ||
254 | /* Move a port's underlying file descriptor to a given value. | |
8b13c6b3 GH |
255 | * Returns #f if fdes is already the given value. |
256 | * #t if fdes moved. | |
0f2d19dd JB |
257 | * MOVE->FDES is implemented in Scheme and calls this primitive. |
258 | */ | |
a1ec6916 | 259 | SCM_DEFINE (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, |
1bbd0b84 | 260 | (SCM port, SCM fd), |
b380b885 MD |
261 | "Moves the underlying file descriptor for @var{port} to the integer\n" |
262 | "value @var{fdes} without changing the revealed count of @var{port}.\n" | |
263 | "Any other ports already using this descriptor will be automatically\n" | |
264 | "shifted to new descriptors and their revealed counts reset to zero.\n" | |
265 | "The return value is @code{#f} if the file descriptor already had the\n" | |
266 | "required value or @code{#t} if it was moved.") | |
1bbd0b84 | 267 | #define FUNC_NAME s_scm_primitive_move_to_fdes |
0f2d19dd | 268 | { |
92c2555f | 269 | scm_t_fport *stream; |
0f2d19dd JB |
270 | int old_fd; |
271 | int new_fd; | |
272 | int rv; | |
273 | ||
78446828 MV |
274 | port = SCM_COERCE_OUTPORT (port); |
275 | ||
34d19ef6 HWN |
276 | SCM_VALIDATE_OPFPORT (1, port); |
277 | SCM_VALIDATE_INUM (2, fd); | |
ee149d03 JB |
278 | stream = SCM_FSTREAM (port); |
279 | old_fd = stream->fdes; | |
0f2d19dd JB |
280 | new_fd = SCM_INUM (fd); |
281 | if (old_fd == new_fd) | |
282 | { | |
8b13c6b3 | 283 | return SCM_BOOL_F; |
0f2d19dd JB |
284 | } |
285 | scm_evict_ports (new_fd); | |
286 | rv = dup2 (old_fd, new_fd); | |
287 | if (rv == -1) | |
1bbd0b84 | 288 | SCM_SYSERROR; |
ee149d03 | 289 | stream->fdes = new_fd; |
0f2d19dd | 290 | SCM_SYSCALL (close (old_fd)); |
8b13c6b3 | 291 | return SCM_BOOL_T; |
0f2d19dd | 292 | } |
1bbd0b84 | 293 | #undef FUNC_NAME |
0f2d19dd | 294 | |
0f2d19dd | 295 | /* Return a list of ports using a given file descriptor. */ |
3b3b36dd | 296 | SCM_DEFINE (scm_fdes_to_ports, "fdes->ports", 1, 0, 0, |
1bbd0b84 | 297 | (SCM fd), |
1e6808ea MG |
298 | "Return a list of existing ports which have @var{fdes} as an\n" |
299 | "underlying file descriptor, without changing their revealed\n" | |
300 | "counts.") | |
1bbd0b84 | 301 | #define FUNC_NAME s_scm_fdes_to_ports |
0f2d19dd JB |
302 | { |
303 | SCM result = SCM_EOL; | |
304 | int int_fd; | |
c014a02e | 305 | long i; |
0f2d19dd | 306 | |
34d19ef6 | 307 | SCM_VALIDATE_INUM_COPY (1, fd, int_fd); |
0f2d19dd | 308 | |
67329a9e | 309 | for (i = 0; i < scm_i_port_table_size; i++) |
0f2d19dd | 310 | { |
67329a9e HWN |
311 | if (SCM_OPFPORTP (scm_i_port_table[i]->port) |
312 | && ((scm_t_fport *) scm_i_port_table[i]->stream)->fdes == int_fd) | |
313 | result = scm_cons (scm_i_port_table[i]->port, result); | |
0f2d19dd | 314 | } |
0f2d19dd | 315 | return result; |
1bbd0b84 GB |
316 | } |
317 | #undef FUNC_NAME | |
0f2d19dd | 318 | |
1cc91f1b | 319 | |
0f2d19dd JB |
320 | void |
321 | scm_init_ioext () | |
0f2d19dd | 322 | { |
52cfc69b GH |
323 | scm_add_feature ("i/o-extensions"); |
324 | ||
a0599745 | 325 | #include "libguile/ioext.x" |
0f2d19dd JB |
326 | } |
327 | ||
89e00824 ML |
328 | |
329 | /* | |
330 | Local Variables: | |
331 | c-file-style: "gnu" | |
332 | End: | |
333 | */ |