| 1 | /* Copyright (C) 1995 Free Software Foundation, Inc. |
| 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 |
| 15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 16 | * |
| 17 | * As a special exception, the Free Software Foundation gives permission |
| 18 | * for additional uses of the text contained in its release of GUILE. |
| 19 | * |
| 20 | * The exception is that, if you link the GUILE library with other files |
| 21 | * to produce an executable, this does not by itself cause the |
| 22 | * resulting executable to be covered by the GNU General Public License. |
| 23 | * Your use of that executable is in no way restricted on account of |
| 24 | * linking the GUILE library code into it. |
| 25 | * |
| 26 | * This exception does not however invalidate any other reasons why |
| 27 | * the executable file might be covered by the GNU General Public License. |
| 28 | * |
| 29 | * This exception applies only to the code released by the |
| 30 | * Free Software Foundation under the name GUILE. If you copy |
| 31 | * code from other Free Software Foundation releases into a copy of |
| 32 | * GUILE, as the General Public License permits, the exception does |
| 33 | * not apply to the code that you add in this way. To avoid misleading |
| 34 | * anyone as to the status of such modified files, you must delete |
| 35 | * this exception notice from them. |
| 36 | * |
| 37 | * If you write modifications of your own for GUILE, it is your choice |
| 38 | * whether to permit this exception to apply to your modifications. |
| 39 | * If you do not wish that, delete this exception notice. |
| 40 | */ |
| 41 | \f |
| 42 | |
| 43 | |
| 44 | #include <stdio.h> |
| 45 | #include "fd.h" |
| 46 | #include "_scm.h" |
| 47 | #include "fports.h" |
| 48 | |
| 49 | #include "ioext.h" |
| 50 | |
| 51 | #ifdef HAVE_STRING_H |
| 52 | #include <string.h> |
| 53 | #endif |
| 54 | #ifdef HAVE_UNISTD_H |
| 55 | #include <unistd.h> |
| 56 | #endif |
| 57 | \f |
| 58 | |
| 59 | SCM_PROC (s_sys_ftell, "ftell", 1, 0, 0, scm_sys_ftell); |
| 60 | |
| 61 | SCM |
| 62 | scm_sys_ftell (port) |
| 63 | SCM port; |
| 64 | { |
| 65 | long pos; |
| 66 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_ftell); |
| 67 | SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port))); |
| 68 | if (pos < 0) |
| 69 | scm_syserror (s_sys_ftell); |
| 70 | if (pos > 0 && SCM_CRDYP (port)) |
| 71 | pos--; |
| 72 | return SCM_MAKINUM (pos); |
| 73 | } |
| 74 | |
| 75 | |
| 76 | |
| 77 | SCM_PROC (s_sys_fseek, "fseek", 3, 0, 0, scm_sys_fseek); |
| 78 | |
| 79 | SCM |
| 80 | scm_sys_fseek (port, offset, whence) |
| 81 | SCM port; |
| 82 | SCM offset; |
| 83 | SCM whence; |
| 84 | { |
| 85 | int rv; |
| 86 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fseek); |
| 87 | SCM_ASSERT (SCM_INUMP (offset), offset, SCM_ARG2, s_sys_fseek); |
| 88 | SCM_ASSERT (SCM_INUMP (whence) && (SCM_INUM (whence) < 3) && (SCM_INUM (whence) >= 0), |
| 89 | whence, SCM_ARG3, s_sys_fseek); |
| 90 | SCM_CLRDY (port); /* Clear ungetted char */ |
| 91 | /* Values of whence are interned in scm_init_ioext. */ |
| 92 | rv = fseek ((FILE *)SCM_STREAM (port), SCM_INUM (offset), SCM_INUM (whence)); |
| 93 | if (rv != 0) |
| 94 | scm_syserror (s_sys_fseek); |
| 95 | return SCM_UNSPECIFIED; |
| 96 | } |
| 97 | |
| 98 | |
| 99 | |
| 100 | SCM_PROC (s_sys_freopen, "freopen", 3, 0, 0, scm_sys_freopen); |
| 101 | |
| 102 | SCM |
| 103 | scm_sys_freopen (filename, modes, port) |
| 104 | SCM filename; |
| 105 | SCM modes; |
| 106 | SCM port; |
| 107 | { |
| 108 | FILE *f; |
| 109 | SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_sys_freopen); |
| 110 | SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_freopen); |
| 111 | SCM_DEFER_INTS; |
| 112 | SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_sys_freopen); |
| 113 | SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port))); |
| 114 | if (!f) |
| 115 | { |
| 116 | SCM p; |
| 117 | p = port; |
| 118 | port = SCM_MAKINUM (errno); |
| 119 | SCM_CAR (p) &= ~SCM_OPN; |
| 120 | scm_remove_from_port_table (p); |
| 121 | } |
| 122 | else |
| 123 | { |
| 124 | SCM_CAR (port) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)); |
| 125 | SCM_SETSTREAM (port, (SCM)f); |
| 126 | if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)))) |
| 127 | scm_setbuf0 (port); |
| 128 | } |
| 129 | SCM_ALLOW_INTS; |
| 130 | return port; |
| 131 | } |
| 132 | |
| 133 | |
| 134 | |
| 135 | SCM_PROC (s_sys_duplicate_port, "duplicate-port", 2, 0, 0, scm_sys_duplicate_port); |
| 136 | |
| 137 | SCM |
| 138 | scm_sys_duplicate_port (oldpt, modes) |
| 139 | SCM oldpt; |
| 140 | SCM modes; |
| 141 | { |
| 142 | int oldfd; |
| 143 | int newfd; |
| 144 | FILE *f; |
| 145 | SCM newpt; |
| 146 | SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_sys_duplicate_port); |
| 147 | SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_duplicate_port); |
| 148 | SCM_NEWCELL (newpt); |
| 149 | SCM_DEFER_INTS; |
| 150 | oldfd = fileno ((FILE *)SCM_STREAM (oldpt)); |
| 151 | if (oldfd == -1) |
| 152 | scm_syserror (s_sys_duplicate_port); |
| 153 | SCM_SYSCALL (newfd = dup (oldfd)); |
| 154 | if (newfd == -1) |
| 155 | scm_syserror (s_sys_duplicate_port); |
| 156 | f = fdopen (newfd, SCM_CHARS (modes)); |
| 157 | if (!f) |
| 158 | { |
| 159 | SCM_SYSCALL (close (newfd)); |
| 160 | scm_syserror (s_sys_duplicate_port); |
| 161 | } |
| 162 | { |
| 163 | struct scm_port_table * pt; |
| 164 | pt = scm_add_to_port_table (newpt); |
| 165 | SCM_SETPTAB_ENTRY (newpt, pt); |
| 166 | if (SCM_BUF0 & (SCM_CAR (newpt) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)))) |
| 167 | scm_setbuf0 (newpt); |
| 168 | SCM_SETSTREAM (newpt, (SCM)f); |
| 169 | SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name; |
| 170 | } |
| 171 | SCM_ALLOW_INTS; |
| 172 | return newpt; |
| 173 | } |
| 174 | |
| 175 | |
| 176 | |
| 177 | SCM_PROC (s_sys_redirect_port, "redirect-port", 2, 0, 0, scm_sys_redirect_port); |
| 178 | |
| 179 | SCM |
| 180 | scm_sys_redirect_port (into_pt, from_pt) |
| 181 | SCM into_pt; |
| 182 | SCM from_pt; |
| 183 | { |
| 184 | int ans, oldfd, newfd; |
| 185 | SCM_DEFER_INTS; |
| 186 | SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_sys_redirect_port); |
| 187 | SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_sys_redirect_port); |
| 188 | oldfd = fileno ((FILE *)SCM_STREAM (into_pt)); |
| 189 | if (oldfd == -1) |
| 190 | scm_syserror (s_sys_redirect_port); |
| 191 | newfd = fileno ((FILE *)SCM_STREAM (from_pt)); |
| 192 | if (newfd == -1) |
| 193 | scm_syserror (s_sys_redirect_port); |
| 194 | SCM_SYSCALL (ans = dup2 (oldfd, newfd)); |
| 195 | if (ans == -1) |
| 196 | scm_syserror (s_sys_redirect_port); |
| 197 | SCM_ALLOW_INTS; |
| 198 | return SCM_UNSPECIFIED; |
| 199 | } |
| 200 | |
| 201 | SCM_PROC (s_sys_fileno, "fileno", 1, 0, 0, scm_sys_fileno); |
| 202 | |
| 203 | SCM |
| 204 | scm_sys_fileno (port) |
| 205 | SCM port; |
| 206 | { |
| 207 | int fd; |
| 208 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno); |
| 209 | fd = fileno ((FILE *)SCM_STREAM (port)); |
| 210 | if (fd == -1) |
| 211 | scm_syserror (s_sys_fileno); |
| 212 | return SCM_MAKINUM (fd); |
| 213 | } |
| 214 | |
| 215 | SCM_PROC (s_sys_isatty, "isatty?", 1, 0, 0, scm_sys_isatty_p); |
| 216 | |
| 217 | SCM |
| 218 | scm_sys_isatty_p (port) |
| 219 | SCM port; |
| 220 | { |
| 221 | int rv; |
| 222 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_isatty); |
| 223 | rv = fileno ((FILE *)SCM_STREAM (port)); |
| 224 | if (rv == -1) |
| 225 | scm_syserror (s_sys_isatty); |
| 226 | rv = isatty (rv); |
| 227 | return rv ? SCM_BOOL_T : SCM_BOOL_F; |
| 228 | } |
| 229 | |
| 230 | |
| 231 | |
| 232 | SCM_PROC (s_sys_fdopen, "fdopen", 2, 0, 0, scm_sys_fdopen); |
| 233 | |
| 234 | SCM |
| 235 | scm_sys_fdopen (fdes, modes) |
| 236 | SCM fdes; |
| 237 | SCM modes; |
| 238 | { |
| 239 | FILE *f; |
| 240 | SCM port; |
| 241 | struct scm_port_table * pt; |
| 242 | |
| 243 | SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_sys_fdopen); |
| 244 | SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_fdopen); |
| 245 | SCM_NEWCELL (port); |
| 246 | SCM_DEFER_INTS; |
| 247 | f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes)); |
| 248 | if (f == NULL) |
| 249 | scm_syserror (s_sys_fdopen); |
| 250 | pt = scm_add_to_port_table (port); |
| 251 | SCM_SETPTAB_ENTRY (port, pt); |
| 252 | if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport |
| 253 | | scm_mode_bits (SCM_CHARS (modes)))) |
| 254 | scm_setbuf0 (port); |
| 255 | SCM_SETSTREAM (port, (SCM)f); |
| 256 | SCM_ALLOW_INTS; |
| 257 | return port; |
| 258 | } |
| 259 | |
| 260 | |
| 261 | |
| 262 | /* Move a port's underlying file descriptor to a given value. |
| 263 | * Returns #f if fdes is already the given value. |
| 264 | * #t if fdes moved. |
| 265 | * MOVE->FDES is implemented in Scheme and calls this primitive. |
| 266 | */ |
| 267 | SCM_PROC (s_sys_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_sys_primitive_move_to_fdes); |
| 268 | |
| 269 | SCM |
| 270 | scm_sys_primitive_move_to_fdes (port, fd) |
| 271 | SCM port; |
| 272 | SCM fd; |
| 273 | { |
| 274 | FILE *stream; |
| 275 | int old_fd; |
| 276 | int new_fd; |
| 277 | int rv; |
| 278 | |
| 279 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_primitive_move_to_fdes); |
| 280 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_sys_primitive_move_to_fdes); |
| 281 | SCM_DEFER_INTS; |
| 282 | stream = (FILE *)SCM_STREAM (port); |
| 283 | old_fd = fileno (stream); |
| 284 | new_fd = SCM_INUM (fd); |
| 285 | if (old_fd == new_fd) |
| 286 | { |
| 287 | SCM_ALLOW_INTS; |
| 288 | return SCM_BOOL_F; |
| 289 | } |
| 290 | scm_evict_ports (new_fd); |
| 291 | rv = dup2 (old_fd, new_fd); |
| 292 | if (rv == -1) |
| 293 | scm_syserror (s_sys_primitive_move_to_fdes); |
| 294 | scm_setfileno (stream, new_fd); |
| 295 | SCM_SYSCALL (close (old_fd)); |
| 296 | SCM_ALLOW_INTS; |
| 297 | return SCM_BOOL_T; |
| 298 | } |
| 299 | |
| 300 | |
| 301 | void |
| 302 | scm_setfileno (fs, fd) |
| 303 | FILE *fs; |
| 304 | int fd; |
| 305 | { |
| 306 | #ifdef SET_FILE_FD_FIELD |
| 307 | SET_FILE_FD_FIELD(fs, fd); |
| 308 | #else |
| 309 | Configure could not guess the name of the correct field in a FILE *. |
| 310 | |
| 311 | This function needs to be ported to your system. |
| 312 | |
| 313 | SET_FILE_FD_FIELD should change the descriptor refered to by a stdio |
| 314 | stream, and nothing else. |
| 315 | |
| 316 | The way to port this file is to add cases to configure.in. Search |
| 317 | that file for "SET_FILE_FD_FIELD" and follow the examples there. |
| 318 | #endif |
| 319 | } |
| 320 | |
| 321 | /* Move ports with the specified file descriptor to new descriptors, |
| 322 | * reseting the revealed count to 0. |
| 323 | * Should be called with SCM_DEFER_INTS active. |
| 324 | */ |
| 325 | |
| 326 | void |
| 327 | scm_evict_ports (fd) |
| 328 | int fd; |
| 329 | { |
| 330 | int i; |
| 331 | |
| 332 | for (i = 0; i < scm_port_table_size; i++) |
| 333 | { |
| 334 | if (SCM_FPORTP (scm_port_table[i]->port) |
| 335 | && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd) |
| 336 | { |
| 337 | scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd)); |
| 338 | scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0)); |
| 339 | } |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | /* Return a list of ports using a given file descriptor. */ |
| 344 | SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports); |
| 345 | |
| 346 | SCM |
| 347 | scm_fdes_to_ports (fd) |
| 348 | SCM fd; |
| 349 | { |
| 350 | SCM result = SCM_EOL; |
| 351 | int int_fd; |
| 352 | int i; |
| 353 | |
| 354 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports); |
| 355 | int_fd = SCM_INUM (fd); |
| 356 | |
| 357 | SCM_DEFER_INTS; |
| 358 | for (i = 0; i < scm_port_table_size; i++) |
| 359 | { |
| 360 | if (SCM_FPORTP (scm_port_table[i]->port) |
| 361 | && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd) |
| 362 | result = scm_cons (scm_port_table[i]->port, result); |
| 363 | } |
| 364 | SCM_ALLOW_INTS; |
| 365 | return result; |
| 366 | } |
| 367 | |
| 368 | |
| 369 | void |
| 370 | scm_init_ioext () |
| 371 | { |
| 372 | /* fseek() symbols. */ |
| 373 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); |
| 374 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); |
| 375 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); |
| 376 | |
| 377 | /* File type/permission bits. */ |
| 378 | #ifdef S_IRUSR |
| 379 | scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR)); |
| 380 | #endif |
| 381 | #ifdef S_IWUSR |
| 382 | scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR)); |
| 383 | #endif |
| 384 | #ifdef S_IXUSR |
| 385 | scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR)); |
| 386 | #endif |
| 387 | #ifdef S_IRWXU |
| 388 | scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU)); |
| 389 | #endif |
| 390 | |
| 391 | #ifdef S_IRGRP |
| 392 | scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP)); |
| 393 | #endif |
| 394 | #ifdef S_IWGRP |
| 395 | scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP)); |
| 396 | #endif |
| 397 | #ifdef S_IXGRP |
| 398 | scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP)); |
| 399 | #endif |
| 400 | #ifdef S_IRWXG |
| 401 | scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG)); |
| 402 | #endif |
| 403 | |
| 404 | #ifdef S_IROTH |
| 405 | scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH)); |
| 406 | #endif |
| 407 | #ifdef S_IWOTH |
| 408 | scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH)); |
| 409 | #endif |
| 410 | #ifdef S_IXOTH |
| 411 | scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH)); |
| 412 | #endif |
| 413 | #ifdef S_IRWXO |
| 414 | scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO)); |
| 415 | #endif |
| 416 | |
| 417 | #ifdef S_ISUID |
| 418 | scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID)); |
| 419 | #endif |
| 420 | #ifdef S_ISGID |
| 421 | scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID)); |
| 422 | #endif |
| 423 | #ifdef S_ISVTX |
| 424 | scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX)); |
| 425 | #endif |
| 426 | |
| 427 | #ifdef S_IFMT |
| 428 | scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT)); |
| 429 | #endif |
| 430 | #ifdef S_IFDIR |
| 431 | scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR)); |
| 432 | #endif |
| 433 | #ifdef S_IFCHR |
| 434 | scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR)); |
| 435 | #endif |
| 436 | #ifdef S_IFBLK |
| 437 | scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK)); |
| 438 | #endif |
| 439 | #ifdef S_IFREG |
| 440 | scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG)); |
| 441 | #endif |
| 442 | #ifdef S_IFLNK |
| 443 | scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK)); |
| 444 | #endif |
| 445 | #ifdef S_IFSOCK |
| 446 | scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK)); |
| 447 | #endif |
| 448 | #ifdef S_IFIFO |
| 449 | scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO)); |
| 450 | #endif |
| 451 | #include "ioext.x" |
| 452 | } |
| 453 | |