libguile/filesys.c

   1 /*      Copyright (C) 1996 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 #include "_scm.h"
  43 #include "genio.h"
  44 #include "smob.h"
  45 #include "feature.h"
  46
  47 #include "filesys.h"
  48 \f
  49 #ifdef TIME_WITH_SYS_TIME
  50 # include <sys/time.h>
  51 # include <time.h>
  52 #else
  53 # if HAVE_SYS_TIME_H
  54 #  include <sys/time.h>
  55 # else
  56 #  include <time.h>
  57 # endif
  58 #endif
  59
  60 #ifdef HAVE_UNISTD_H
  61 #include <unistd.h>
  62 #endif
  63
  64 #ifdef LIBC_H_WITH_UNISTD_H
  65 #include <libc.h>
  66 #endif
  67
  68 #ifdef HAVE_SYS_SELECT_H
  69 #include <sys/select.h>
  70 #endif
  71
  72 #ifdef HAVE_STRING_H
  73 #include <string.h>
  74 #endif
  75
  76 #include <sys/types.h>
  77 #include <sys/stat.h>
  78 #include <fcntl.h>
  79
  80 #include <pwd.h>
  81
  82
  83 #ifdef FD_SET
  84
  85 #define SELECT_TYPE fd_set
  86 #define SELECT_SET_SIZE FD_SETSIZE
  87
  88 #else /* no FD_SET */
  89
  90 /* Define the macros to access a single-int bitmap of descriptors.  */
  91 #define SELECT_SET_SIZE 32
  92 #define SELECT_TYPE int
  93 #define FD_SET(n, p) (*(p) |= (1 << (n)))
  94 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
  95 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
  96 #define FD_ZERO(p) (*(p) = 0)
  97
  98 #endif /* no FD_SET */
  99
 100 #if HAVE_DIRENT_H
 101 # include <dirent.h>
 102 # define NAMLEN(dirent) strlen((dirent)->d_name)
 103 #else
 104 # define dirent direct
 105 # define NAMLEN(dirent) (dirent)->d_namlen
 106 # if HAVE_SYS_NDIR_H
 107 #  include <sys/ndir.h>
 108 # endif
 109 # if HAVE_SYS_DIR_H
 110 #  include <sys/dir.h>
 111 # endif
 112 # if HAVE_NDIR_H
 113 #  include <ndir.h>
 114 # endif
 115 #endif
 116
 117 \f
 118
 119 #ifdef O_CREAT
 120 SCM_CONST_LONG (scm_O_CREAT, "O_CREAT", O_CREAT);
 121 #endif
 122
 123 #ifdef O_EXCL
 124 SCM_CONST_LONG (scm_O_EXCL, "O_EXCL", O_EXCL);
 125 #endif
 126
 127 #ifdef O_NOCTTY
 128 SCM_CONST_LONG (scm_O_NOCTTY, "O_NOCTTY", O_NOCTTY);
 129 #endif
 130
 131 #ifdef O_TRUNC
 132 SCM_CONST_LONG (scm_O_TRUNC, "O_TRUNC", O_TRUNC);
 133 #endif
 134
 135 #ifdef O_APPEND
 136 SCM_CONST_LONG (scm_O_APPEND, "O_APPEND", O_APPEND);
 137 #endif
 138
 139 #ifdef O_NONBLOCK
 140 SCM_CONST_LONG (scm_O_NONBLOCK, "O_NONBLOCK", O_NONBLOCK);
 141 #endif
 142
 143 #ifdef O_NDELAY
 144 SCM_CONST_LONG (scm_O_NDELAY, "O_NDELAY", O_NDELAY);
 145 #endif
 146
 147 #ifdef O_SYNC
 148 SCM_CONST_LONG (scm_O_SYNC, "O_SYNC", O_SYNC);
 149 #endif
 150
 151
 152
 153 \f
 154
 155 /* {Permissions}
 156  */
 157
 158 SCM_PROC (s_sys_chown, "chown", 3, 0, 0, scm_sys_chown);
 159
 160 SCM
 161 scm_sys_chown (path, owner, group)
 162      SCM path;
 163      SCM owner;
 164      SCM group;
 165 {
 166   int val;
 167
 168   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1, s_sys_chown);
 169   if (SCM_SUBSTRP (path))
 170     path = scm_makfromstr (SCM_ROCHARS (path), SCM_ROLENGTH (path), 0);
 171   SCM_ASSERT (SCM_INUMP (owner), owner, SCM_ARG2, s_sys_chown);
 172   SCM_ASSERT (SCM_INUMP (group), group, SCM_ARG3, s_sys_chown);
 173   SCM_SYSCALL (val = chown (SCM_ROCHARS (path),
 174                             SCM_INUM (owner), SCM_INUM (group)));
 175   if (val != 0)
 176     scm_syserror (s_sys_chown);
 177   return SCM_UNSPECIFIED;
 178 }
 179
 180
 181 SCM_PROC (s_sys_chmod, "chmod", 2, 0, 0, scm_sys_chmod);
 182
 183 SCM
 184 scm_sys_chmod (port_or_path, mode)
 185      SCM port_or_path;
 186      SCM mode;
 187 {
 188   int rv;
 189   SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_sys_chmod);
 190   SCM_ASSERT (SCM_NIMP (port_or_path), port_or_path, SCM_ARG1, s_sys_chmod);
 191   if (SCM_STRINGP (port_or_path))
 192     SCM_SYSCALL (rv = chmod (SCM_CHARS (port_or_path), SCM_INUM (mode)));
 193   else
 194     {
 195       SCM_ASSERT (SCM_OPFPORTP (port_or_path), port_or_path, SCM_ARG1, s_sys_chmod);
 196       rv = fileno ((FILE *)SCM_STREAM (port_or_path));
 197       if (rv != -1)
 198         SCM_SYSCALL (rv = fchmod (rv, SCM_INUM (mode)));
 199     }
 200   if (rv != 0)
 201     scm_syserror (s_sys_chmod);
 202   return SCM_UNSPECIFIED;
 203 }
 204
 205 SCM_PROC (s_umask, "umask", 0, 1, 0, scm_umask);
 206
 207 SCM
 208 scm_umask (mode)
 209      SCM mode;
 210 {
 211   mode_t mask;
 212   if (SCM_UNBNDP (mode))
 213     {
 214       mask = umask (0);
 215       umask (mask);
 216     }
 217   else
 218     {
 219       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG1, s_umask);
 220       mask = umask (SCM_INUM (mode));
 221     }
 222   return SCM_MAKINUM (mask);
 223 }
 224
 225 \f
 226 /* {File Descriptors}
 227  */
 228 long scm_tc16_fd;
 229
 230
 231 static int scm_fd_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
 232
 233 static int
 234 scm_fd_print (sexp, port, pstate)
 235      SCM sexp;
 236      SCM port;
 237      scm_print_state *pstate;
 238 {
 239   scm_gen_puts (scm_regular_string, "#<fd ", port);
 240   scm_intprint (SCM_CDR (sexp), 10, port);
 241   scm_gen_puts (scm_regular_string, ">", port);
 242   return 1;
 243 }
 244
 245
 246 static scm_sizet scm_fd_free SCM_P ((SCM p));
 247
 248 static scm_sizet
 249 scm_fd_free (p)
 250      SCM p;
 251 {
 252   SCM flags;
 253
 254   flags = SCM_FD_FLAGS (p);
 255   if ((scm_close_fd_on_gc & flags) && (scm_fd_is_open & flags))
 256     {
 257       SCM_SYSCALL( close (SCM_FD (p)) );
 258     }
 259   return 0;
 260 }
 261
 262 static scm_smobfuns fd_smob = {scm_mark0, scm_fd_free, scm_fd_print, 0};
 263
 264
 265 SCM
 266 scm_intern_fd (fd, flags)
 267      int fd;
 268      int flags;
 269 {
 270   SCM it;
 271   SCM_NEWCELL (it);
 272   SCM_REDEFER_INTS;
 273   SCM_SETCAR (it, (scm_tc16_fd | (flags << 16)));
 274   SCM_SETCDR (it, (SCM)fd);
 275   SCM_REALLOW_INTS;
 276   return it;
 277 }
 278
 279 \f
 280
 281 SCM_PROC (s_sys_open, "open", 3, 0, 0, scm_sys_open);
 282
 283 SCM
 284 scm_sys_open (path, flags, mode)
 285      SCM path;
 286      SCM flags;
 287      SCM mode;
 288 {
 289   int fd;
 290   SCM sfd;
 291
 292   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1, s_sys_open);
 293   SCM_ASSERT (SCM_INUMP (flags), flags, SCM_ARG2, s_sys_open);
 294   SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG3, s_sys_open);
 295
 296   if (SCM_SUBSTRP (path))
 297     path = scm_makfromstr (SCM_ROCHARS (path), SCM_ROLENGTH (path), 0);
 298
 299   SCM_DEFER_INTS;
 300   SCM_SYSCALL ( fd = open (SCM_ROCHARS (path), SCM_INUM (flags), SCM_INUM (mode)) );
 301   if (fd == -1)
 302     scm_syserror (s_sys_open);
 303   sfd = scm_intern_fd (fd, scm_fd_is_open | scm_close_fd_on_gc);
 304   SCM_ALLOW_INTS;
 305
 306   return scm_return_first (sfd, path);
 307 }
 308
 309
 310 SCM_PROC (s_sys_create, "create", 2, 0, 0, scm_sys_create);
 311
 312 SCM
 313 scm_sys_create (path, mode)
 314      SCM path;
 315      SCM mode;
 316 {
 317   int fd;
 318   SCM sfd;
 319
 320   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1, s_sys_create);
 321   SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_sys_create);
 322
 323   if (SCM_SUBSTRP (path))
 324     path = scm_makfromstr (SCM_ROCHARS (path), SCM_ROLENGTH (path), 0);
 325
 326   SCM_DEFER_INTS;
 327   SCM_SYSCALL ( fd = creat (SCM_ROCHARS (path), SCM_INUM (mode)) );
 328   if (fd == -1)
 329     scm_syserror (s_sys_create);
 330   sfd = scm_intern_fd (fd, scm_fd_is_open | scm_close_fd_on_gc);
 331   SCM_ALLOW_INTS;
 332
 333   return scm_return_first (sfd, path);
 334 }
 335
 336
 337 SCM_PROC (s_sys_close, "close", 1, 0, 0, scm_sys_close);
 338
 339 SCM
 340 scm_sys_close (sfd)
 341      SCM sfd;
 342 {
 343   int fd;
 344   int got;
 345   SCM_ASSERT (SCM_NIMP (sfd) && SCM_FD_P (sfd), sfd, SCM_ARG1,  s_sys_close);
 346   fd = SCM_FD (sfd);
 347
 348   SCM_DEFER_INTS;
 349   got = close (fd);
 350   SCM_SETCAR (sfd, scm_tc16_fd);
 351   SCM_ALLOW_INTS;
 352   if (got == -1)
 353     scm_syserror (s_sys_close);
 354   return SCM_UNSPECIFIED;
 355 }
 356
 357
 358 SCM_PROC (s_sys_write_fd, "write-fd", 2, 0, 0, scm_sys_write_fd);
 359
 360 SCM
 361 scm_sys_write_fd (sfd, buf)
 362      SCM sfd;
 363      SCM buf;
 364 {
 365   SCM answer;
 366   int fd;
 367   size_t written;
 368   SCM_ASSERT (SCM_NIMP (sfd) && SCM_FD_P (sfd), sfd, SCM_ARG1,  s_sys_write_fd);
 369   SCM_ASSERT (SCM_NIMP (buf) && SCM_ROSTRINGP (buf), buf, SCM_ARG2,  s_sys_write_fd);
 370   fd = SCM_FD (sfd);
 371   SCM_DEFER_INTS;
 372   written = write (fd, SCM_ROCHARS (buf), SCM_ROLENGTH (buf));
 373   if (written == -1)
 374     scm_syserror (s_sys_write_fd);
 375   answer = scm_long2num (written);
 376   SCM_ALLOW_INTS;
 377   return scm_return_first (answer, buf);
 378 }
 379
 380
 381 SCM_PROC (s_sys_read_fd, "read-fd", 2, 2, 0, scm_sys_read_fd);
 382
 383 SCM
 384 scm_sys_read_fd (sfd, buf, offset, length)
 385      SCM sfd;
 386      SCM buf;
 387      SCM offset;
 388      SCM length;
 389 {
 390   SCM answer;
 391   int fd;
 392   char * bytes;
 393   int off;
 394   int len;
 395   size_t got;
 396
 397   SCM_ASSERT (SCM_NIMP (sfd) && SCM_FD_P (sfd), sfd, SCM_ARG1,  s_sys_read_fd);
 398   fd = SCM_FD (sfd);
 399
 400   SCM_ASSERT (SCM_NIMP (buf) && SCM_STRINGP (buf), buf, SCM_ARG2,  s_sys_read_fd);
 401   bytes = SCM_CHARS (buf);
 402
 403   if (SCM_UNBNDP (offset))
 404     off = 0;
 405   else
 406     {
 407       SCM_ASSERT (SCM_INUMP (offset), offset, SCM_ARG3, s_sys_read_fd);
 408       off = SCM_INUM (offset);
 409     }
 410
 411   if (SCM_UNBNDP (length))
 412     len = SCM_LENGTH (buf);
 413   else
 414     {
 415       SCM_ASSERT (SCM_INUMP (length), length, SCM_ARG3, s_sys_read_fd);
 416       len = SCM_INUM (length);
 417     }
 418
 419   SCM_DEFER_INTS;
 420   got = read (fd, bytes + off, len);
 421   if (got == -1)
 422     scm_syserror (s_sys_read_fd);
 423   answer = scm_long2num (got);
 424   SCM_ALLOW_INTS;
 425   return scm_return_first (answer, buf);
 426 }
 427
 428 SCM_PROC (s_sys_lseek, "lseek", 2, 1, 0, scm_sys_lseek);
 429
 430 SCM
 431 scm_sys_lseek (sfd, offset, whence)
 432      SCM sfd;
 433      SCM offset;
 434      SCM whence;
 435 {
 436   SCM answer;
 437   int fd;
 438   long off;
 439   int wh;
 440   long got;
 441
 442   SCM_ASSERT (SCM_NIMP (sfd) && SCM_FD_P (sfd), sfd, SCM_ARG1,  s_sys_lseek);
 443   fd = SCM_FD (sfd);
 444
 445   off = scm_num2long (offset, (char *)SCM_ARG2, s_sys_lseek);
 446   if (SCM_UNBNDP (whence))
 447     wh = SEEK_SET;
 448   else
 449     {
 450       SCM_ASSERT (SCM_INUMP (whence), whence, SCM_ARG3, s_sys_lseek);
 451       wh = SCM_INUM (whence);
 452     }
 453
 454   SCM_DEFER_INTS;
 455   SCM_SYSCALL (got = lseek (fd, off, wh));
 456   if (got == -1)
 457     scm_syserror (s_sys_lseek);
 458   answer = scm_long2num (got);
 459   SCM_ALLOW_INTS;
 460   return answer;
 461 }
 462
 463
 464 SCM_PROC (s_sys_dup, "dup", 1, 1, 0, scm_sys_dup);
 465
 466 SCM
 467 scm_sys_dup (oldfd, newfd)
 468      SCM oldfd;
 469      SCM newfd;
 470 {
 471   SCM answer;
 472   int fd;
 473   int nfd;
 474   int (*fn)();
 475
 476   SCM_ASSERT (SCM_NIMP (oldfd) && SCM_FD_P (oldfd), oldfd, SCM_ARG1,  s_sys_dup);
 477   SCM_ASSERT (SCM_UNBNDP (newfd) || SCM_INUMP (newfd), newfd, SCM_ARG2,  s_sys_dup);
 478   fd = SCM_FD (oldfd);
 479   nfd = (SCM_INUMP (newfd) ? SCM_INUM (newfd) : -1);
 480
 481   SCM_DEFER_INTS;
 482   fn = ((nfd == -1) ? (int (*)())dup : (int (*)())dup2);
 483   nfd = fn (fd, nfd);
 484   if (nfd == -1)
 485     scm_syserror (s_sys_dup);
 486   answer = SCM_MAKINUM (nfd);
 487   SCM_ALLOW_INTS;
 488   return answer;
 489 }
 490
 491
 492 \f
 493 /* {Files}
 494  */
 495
 496 SCM_SYMBOL (scm_sym_regular, "regular");
 497 SCM_SYMBOL (scm_sym_directory, "directory");
 498 SCM_SYMBOL (scm_sym_symlink, "symlink");
 499 SCM_SYMBOL (scm_sym_block_special, "block-special");
 500 SCM_SYMBOL (scm_sym_char_special, "char-special");
 501 SCM_SYMBOL (scm_sym_fifo, "fifo");
 502 SCM_SYMBOL (scm_sym_sock, "socket");
 503 SCM_SYMBOL (scm_sym_unknown, "unknown");
 504
 505 static SCM scm_stat2scm SCM_P ((struct stat *stat_temp));
 506
 507 static SCM
 508 scm_stat2scm (stat_temp)
 509      struct stat *stat_temp;
 510 {
 511   SCM ans = scm_make_vector (SCM_MAKINUM (15), SCM_UNSPECIFIED, SCM_BOOL_F);
 512   SCM *ve = SCM_VELTS (ans);
 513
 514   ve[0] = scm_ulong2num ((unsigned long) stat_temp->st_dev);
 515   ve[1] = scm_ulong2num ((unsigned long) stat_temp->st_ino);
 516   ve[2] = scm_ulong2num ((unsigned long) stat_temp->st_mode);
 517   ve[3] = scm_ulong2num ((unsigned long) stat_temp->st_nlink);
 518   ve[4] = scm_ulong2num ((unsigned long) stat_temp->st_uid);
 519   ve[5] = scm_ulong2num ((unsigned long) stat_temp->st_gid);
 520 #ifdef HAVE_ST_RDEV
 521   ve[6] = scm_ulong2num ((unsigned long) stat_temp->st_rdev);
 522 #else
 523   ve[6] = SCM_BOOL_F;
 524 #endif
 525   ve[7] = scm_ulong2num ((unsigned long) stat_temp->st_size);
 526   ve[8] = scm_ulong2num ((unsigned long) stat_temp->st_atime);
 527   ve[9] = scm_ulong2num ((unsigned long) stat_temp->st_mtime);
 528   ve[10] = scm_ulong2num ((unsigned long) stat_temp->st_ctime);
 529 #ifdef HAVE_ST_BLKSIZE
 530   ve[11] = scm_ulong2num ((unsigned long) stat_temp->st_blksize);
 531 #else
 532   ve[11] = scm_ulong2num (4096L);
 533 #endif
 534 #ifdef HAVE_ST_BLOCKS
 535   ve[12] = scm_ulong2num ((unsigned long) stat_temp->st_blocks);
 536 #else
 537   ve[12] = SCM_BOOL_F;
 538 #endif
 539   {
 540     int mode = stat_temp->st_mode;
 541
 542     if (S_ISREG (mode))
 543       ve[13] = scm_sym_regular;
 544     else if (S_ISDIR (mode))
 545       ve[13] = scm_sym_directory;
 546     else if (S_ISLNK (mode))
 547       ve[13] = scm_sym_symlink;
 548     else if (S_ISBLK (mode))
 549       ve[13] = scm_sym_block_special;
 550     else if (S_ISCHR (mode))
 551       ve[13] = scm_sym_char_special;
 552     else if (S_ISFIFO (mode))
 553       ve[13] = scm_sym_fifo;
 554     else if (S_ISSOCK (mode))
 555       ve[13] = scm_sym_sock;
 556     else
 557       ve[13] = scm_sym_unknown;
 558
 559     ve[14] = SCM_MAKINUM ((~S_IFMT) & mode);
 560
 561     /* the layout of the bits in ve[14] is intended to be portable.
 562        If there are systems that don't follow the usual convention,
 563        the following could be used:
 564
 565        tmp = 0;
 566        if (S_ISUID & mode) tmp += 1;
 567        tmp <<= 1;
 568        if (S_IRGRP & mode) tmp += 1;
 569        tmp <<= 1;
 570        if (S_ISVTX & mode) tmp += 1;
 571        tmp <<= 1;
 572        if (S_IRUSR & mode) tmp += 1;
 573        tmp <<= 1;
 574        if (S_IWUSR & mode) tmp += 1;
 575        tmp <<= 1;
 576        if (S_IXUSR & mode) tmp += 1;
 577        tmp <<= 1;
 578        if (S_IWGRP & mode) tmp += 1;
 579        tmp <<= 1;
 580        if (S_IXGRP & mode) tmp += 1;
 581        tmp <<= 1;
 582        if (S_IROTH & mode) tmp += 1;
 583        tmp <<= 1;
 584        if (S_IWOTH & mode) tmp += 1;
 585        tmp <<= 1;
 586        if (S_IXOTH & mode) tmp += 1;
 587
 588        ve[14] = SCM_MAKINUM (tmp);
 589
 590        */
 591   }
 592
 593   return ans;
 594 }
 595
 596 SCM_PROC (s_sys_stat, "stat", 1, 0, 0, scm_sys_stat);
 597
 598 SCM
 599 scm_sys_stat (fd_or_path)
 600      SCM fd_or_path;
 601 {
 602   int rv = 1;
 603   struct stat stat_temp;
 604
 605   if (SCM_INUMP (fd_or_path))
 606     {
 607       rv = SCM_INUM (fd_or_path);
 608       SCM_SYSCALL (rv = fstat (rv, &stat_temp));
 609     }
 610   else if (SCM_NIMP (fd_or_path) && SCM_FD_P (fd_or_path))
 611     {
 612       rv = SCM_FD (fd_or_path);
 613       SCM_SYSCALL (rv = fstat (rv, &stat_temp));
 614     }
 615   else
 616     {
 617       SCM_ASSERT (SCM_NIMP (fd_or_path), fd_or_path, SCM_ARG1, s_sys_stat);
 618       SCM_ASSERT (SCM_ROSTRINGP (fd_or_path), fd_or_path, SCM_ARG1, s_sys_stat);
 619       if (SCM_ROSTRINGP (fd_or_path))
 620         {
 621           if (SCM_SUBSTRP (fd_or_path))
 622             fd_or_path = scm_makfromstr (SCM_ROCHARS (fd_or_path), SCM_ROLENGTH (fd_or_path), 0);
 623           SCM_SYSCALL (rv = stat (SCM_CHARS (fd_or_path), &stat_temp));
 624         }
 625
 626     }
 627   if (rv != 0)
 628     scm_syserror_msg (s_sys_stat, "%s: %S",
 629                       scm_listify (scm_makfrom0str (strerror (errno)),
 630                                    fd_or_path,
 631                                    SCM_UNDEFINED));
 632   return scm_stat2scm (&stat_temp);
 633 }
 634
 635
 636 \f
 637 /* {Modifying Directories}
 638  */
 639
 640 SCM_PROC (s_sys_link, "link", 2, 0, 0, scm_sys_link);
 641
 642 SCM
 643 scm_sys_link (oldpath, newpath)
 644      SCM oldpath;
 645      SCM newpath;
 646 {
 647   int val;
 648
 649   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1, s_sys_link);
 650   if (SCM_SUBSTRP (oldpath))
 651     oldpath = scm_makfromstr (SCM_ROCHARS (oldpath), SCM_ROLENGTH (oldpath), 0);
 652   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2, s_sys_link);
 653   if (SCM_SUBSTRP (newpath))
 654     newpath = scm_makfromstr (SCM_ROCHARS (newpath), SCM_ROLENGTH (newpath), 0);
 655   SCM_SYSCALL (val = link (SCM_ROCHARS (oldpath), SCM_ROCHARS (newpath)));
 656   if (val != 0)
 657     scm_syserror (s_sys_link);
 658   return SCM_UNSPECIFIED;
 659 }
 660
 661
 662
 663 SCM_PROC (s_sys_rename, "rename-file", 2, 0, 0, scm_sys_rename);
 664
 665 SCM
 666 scm_sys_rename (oldname, newname)
 667      SCM oldname;
 668      SCM newname;
 669 {
 670   int rv;
 671   SCM_ASSERT (SCM_NIMP (oldname) && SCM_STRINGP (oldname), oldname, SCM_ARG1, s_sys_rename);
 672   SCM_ASSERT (SCM_NIMP (newname) && SCM_STRINGP (newname), newname, SCM_ARG2, s_sys_rename);
 673 #ifdef HAVE_RENAME
 674   SCM_SYSCALL (rv = rename (SCM_CHARS (oldname), SCM_CHARS (newname)));
 675   if (rv != 0)
 676     scm_syserror (s_sys_rename);
 677   return SCM_UNSPECIFIED;
 678 #else
 679   SCM_DEFER_INTS;
 680   SCM_SYSCALL (rv = link (SCM_CHARS (oldname), SCM_CHARS (newname)));
 681   if (rv == 0)
 682     {
 683       SCM_SYSCALL (rv = unlink (SCM_CHARS (oldname)));;
 684       if (rv != 0)
 685         /* unlink failed.  remove new name */
 686         SCM_SYSCALL (unlink (SCM_CHARS (newname)));
 687     }
 688   SCM_ALLOW_INTS;
 689   if (rv != 0)
 690     scm_syserror (s_sys_rename);
 691   return SCM_UNSPECIFIED;
 692 #endif
 693 }
 694
 695
 696 SCM_PROC(s_sys_delete_file, "delete-file", 1, 0, 0, scm_sys_delete_file);
 697
 698 SCM
 699 scm_sys_delete_file (str)
 700      SCM str;
 701 {
 702   int ans;
 703   SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_sys_delete_file);
 704   SCM_SYSCALL (ans = unlink (SCM_CHARS (str)));
 705   if (ans != 0)
 706     scm_syserror (s_sys_delete_file);
 707   return SCM_UNSPECIFIED;
 708 }
 709
 710
 711 SCM_PROC (s_sys_mkdir, "mkdir", 1, 1, 0, scm_sys_mkdir);
 712
 713 SCM
 714 scm_sys_mkdir (path, mode)
 715      SCM path;
 716      SCM mode;
 717 {
 718 #ifdef HAVE_MKDIR
 719   int rv;
 720   mode_t mask;
 721   SCM_ASSERT (SCM_NIMP (path) && SCM_STRINGP (path), path, SCM_ARG1, s_sys_mkdir);
 722   if (SCM_UNBNDP (mode))
 723     {
 724       mask = umask (0);
 725       umask (mask);
 726       SCM_SYSCALL (rv = mkdir (SCM_CHARS (path), 0777 ^ mask));
 727     }
 728   else
 729     {
 730       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_sys_mkdir);
 731       SCM_SYSCALL (rv = mkdir (SCM_CHARS (path), SCM_INUM (mode)));
 732     }
 733   if (rv != 0)
 734     scm_syserror (s_sys_mkdir);
 735   return SCM_UNSPECIFIED;
 736 #else
 737   scm_sysmissing (s_sys_mkdir);
 738   /* not reached.  */
 739   return SCM_BOOL_F;
 740 #endif
 741 }
 742
 743
 744 SCM_PROC (s_sys_rmdir, "rmdir", 1, 0, 0, scm_sys_rmdir);
 745
 746 SCM
 747 scm_sys_rmdir (path)
 748      SCM path;
 749 {
 750 #ifdef HAVE_RMDIR
 751   int val;
 752
 753   SCM_ASSERT (SCM_NIMP (path) && SCM_STRINGP (path), path, SCM_ARG1, s_sys_rmdir);
 754   SCM_SYSCALL (val = rmdir (SCM_CHARS (path)));
 755   if (val != 0)
 756     scm_syserror (s_sys_rmdir);
 757   return SCM_UNSPECIFIED;
 758 #else
 759   scm_sysmissing (s_sys_rmdir);
 760   /* not reached.  */
 761   return SCM_BOOL_F;
 762 #endif
 763 }
 764
 765 \f
 766 /* {Examining Directories}
 767  */
 768
 769 long scm_tc16_dir;
 770
 771 SCM_PROC (s_sys_opendir, "opendir", 1, 0, 0, scm_sys_opendir);
 772
 773 SCM
 774 scm_sys_opendir (dirname)
 775      SCM dirname;
 776 {
 777   DIR *ds;
 778   SCM dir;
 779   SCM_ASSERT (SCM_NIMP (dirname) && SCM_STRINGP (dirname), dirname, SCM_ARG1, s_sys_opendir);
 780   SCM_NEWCELL (dir);
 781   SCM_DEFER_INTS;
 782   SCM_SYSCALL (ds = opendir (SCM_CHARS (dirname)));
 783   if (ds == NULL)
 784     scm_syserror (s_sys_opendir);
 785   SCM_SETCAR (dir, scm_tc16_dir | SCM_OPN);
 786   SCM_SETCDR (dir, ds);
 787   SCM_ALLOW_INTS;
 788   return dir;
 789 }
 790
 791
 792 SCM_PROC (s_sys_readdir, "readdir", 1, 0, 0, scm_sys_readdir);
 793
 794 SCM
 795 scm_sys_readdir (port)
 796      SCM port;
 797 {
 798   struct dirent *rdent;
 799   SCM_DEFER_INTS;
 800   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_sys_readdir);
 801   errno = 0;
 802   SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port)));
 803   SCM_ALLOW_INTS;
 804   if (errno != 0)
 805     scm_syserror (s_sys_readdir);
 806   return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0)
 807           : SCM_EOF_VAL);
 808 }
 809
 810
 811
 812 SCM_PROC (s_rewinddir, "rewinddir", 1, 0, 0, scm_rewinddir);
 813
 814 SCM
 815 scm_rewinddir (port)
 816      SCM port;
 817 {
 818   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_rewinddir);
 819   rewinddir ((DIR *) SCM_CDR (port));
 820   return SCM_UNSPECIFIED;
 821 }
 822
 823
 824
 825 SCM_PROC (s_sys_closedir, "closedir", 1, 0, 0, scm_sys_closedir);
 826
 827 SCM
 828 scm_sys_closedir (port)
 829      SCM port;
 830 {
 831   int sts;
 832
 833   SCM_ASSERT (SCM_NIMP (port) && SCM_DIRP (port), port, SCM_ARG1, s_sys_closedir);
 834   SCM_DEFER_INTS;
 835   if (SCM_CLOSEDP (port))
 836     {
 837       SCM_ALLOW_INTS;
 838       return SCM_UNSPECIFIED;
 839     }
 840   SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port)));
 841   if (sts != 0)
 842     scm_syserror (s_sys_closedir);
 843   SCM_SETCAR (port, scm_tc16_dir);
 844   SCM_ALLOW_INTS;
 845   return SCM_UNSPECIFIED;
 846 }
 847
 848
 849
 850
 851 static int scm_dir_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
 852
 853 static int
 854 scm_dir_print (sexp, port, pstate)
 855      SCM sexp;
 856      SCM port;
 857      scm_print_state *pstate;
 858 {
 859   scm_prinport (sexp, port, "directory");
 860   return 1;
 861 }
 862
 863
 864 static scm_sizet scm_dir_free SCM_P ((SCM p));
 865
 866 static scm_sizet
 867 scm_dir_free (p)
 868      SCM p;
 869 {
 870   if (SCM_OPENP (p))
 871     closedir ((DIR *) SCM_CDR (p));
 872   return 0;
 873 }
 874
 875 static scm_smobfuns dir_smob = {scm_mark0, scm_dir_free, scm_dir_print, 0};
 876
 877 \f
 878 /* {Navigating Directories}
 879  */
 880
 881
 882 SCM_PROC (s_sys_chdir, "chdir", 1, 0, 0, scm_sys_chdir);
 883
 884 SCM
 885 scm_sys_chdir (str)
 886      SCM str;
 887 {
 888   int ans;
 889
 890   SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), str, SCM_ARG1, s_sys_chdir);
 891   SCM_SYSCALL (ans = chdir (SCM_CHARS (str)));
 892   if (ans != 0)
 893     scm_syserror (s_sys_chdir);
 894   return SCM_UNSPECIFIED;
 895 }
 896
 897
 898
 899 SCM_PROC (s_sys_getcwd, "getcwd", 0, 0, 0, scm_sys_getcwd);
 900
 901 SCM
 902 scm_sys_getcwd ()
 903 {
 904 #ifdef HAVE_GETCWD
 905   char *rv;
 906
 907   scm_sizet size = 100;
 908   char *wd;
 909   SCM result;
 910
 911   SCM_DEFER_INTS;
 912   wd = scm_must_malloc (size, s_sys_getcwd);
 913   while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
 914     {
 915       scm_must_free (wd);
 916       size *= 2;
 917       wd = scm_must_malloc (size, s_sys_getcwd);
 918     }
 919   if (rv == 0)
 920     scm_syserror (s_sys_getcwd);
 921   result = scm_makfromstr (wd, strlen (wd), 0);
 922   scm_must_free (wd);
 923   SCM_ALLOW_INTS;
 924   return result;
 925 #else
 926   scm_sysmissing (s_sys_getcwd);
 927   /* not reached.  */
 928   return SCM_BOOL_F;
 929 #endif
 930 }
 931
 932 \f
 933
 934
 935 static void fill_select_type SCM_P ((SELECT_TYPE * set, SCM list));
 936
 937 static void
 938 fill_select_type (set, list)
 939      SELECT_TYPE * set;
 940      SCM list;
 941 {
 942   while (list != SCM_EOL)
 943     {
 944       if (   SCM_NIMP (SCM_CAR (list))
 945           && (scm_tc16_fport == SCM_TYP16 (SCM_CAR (list)))
 946           && SCM_OPPORTP (SCM_CAR (list)))
 947         FD_SET (fileno ((FILE *)SCM_STREAM (SCM_CAR (list))), set);
 948       else if (SCM_INUMP (SCM_CAR (list)))
 949         FD_SET (SCM_INUM (SCM_CAR (list)), set);
 950       else if (SCM_NIMP (SCM_CAR (list)) && SCM_FD_P (SCM_CAR (list)))
 951         FD_SET (SCM_FD (SCM_CAR (list)), set);
 952       list = SCM_CDR (list);
 953     }
 954 }
 955
 956
 957 static SCM retrieve_select_type SCM_P ((SELECT_TYPE * set, SCM list));
 958
 959 static SCM
 960 retrieve_select_type (set, list)
 961      SELECT_TYPE * set;
 962      SCM list;
 963 {
 964   SCM answer;
 965   answer = SCM_EOL;
 966   while (list != SCM_EOL)
 967     {
 968       if (   SCM_NIMP (SCM_CAR (list))
 969           && (scm_tc16_fport == SCM_TYP16 (SCM_CAR (list)))
 970           && SCM_OPPORTP (SCM_CAR (list)))
 971         {
 972           if (FD_ISSET (fileno ((FILE *)SCM_STREAM (SCM_CAR (list))), set))
 973             answer = scm_cons (SCM_CAR (list), answer);
 974         }
 975       else if (SCM_INUMP (SCM_CAR (list)))
 976         {
 977           if (FD_ISSET (SCM_INUM (SCM_CAR (list)), set))
 978             answer = scm_cons (SCM_CAR (list), answer);
 979         }
 980       else if (SCM_NIMP (SCM_CAR (list)) && SCM_FD_P (SCM_CAR (list)))
 981         {
 982           if (FD_ISSET (SCM_FD (SCM_CAR (list)), set))
 983             answer = scm_cons (SCM_CAR (list), answer);
 984         }
 985       list = SCM_CDR (list);
 986     }
 987   return answer;
 988 }
 989
 990
 991 /* {Checking for events}
 992  */
 993
 994 SCM_PROC (s_sys_select, "select", 3, 2, 0, scm_sys_select);
 995
 996 SCM
 997 scm_sys_select (reads, writes, excepts, secs, msecs)
 998      SCM reads;
 999      SCM writes;
1000      SCM excepts;
1001      SCM secs;
1002      SCM msecs;
1003 {
1004 #ifdef HAVE_SELECT
1005   struct timeval timeout;
1006   struct timeval * time_p;
1007   SELECT_TYPE read_set;
1008   SELECT_TYPE write_set;
1009   SELECT_TYPE except_set;
1010   int sreturn;
1011
1012   SCM_ASSERT (-1 < scm_ilength (reads), reads, SCM_ARG1, s_sys_select);
1013   SCM_ASSERT (-1 < scm_ilength (writes), reads, SCM_ARG1, s_sys_select);
1014   SCM_ASSERT (-1 < scm_ilength (excepts), reads, SCM_ARG1, s_sys_select);
1015
1016   FD_ZERO (&read_set);
1017   FD_ZERO (&write_set);
1018   FD_ZERO (&except_set);
1019
1020   fill_select_type (&read_set, reads);
1021   fill_select_type (&write_set, writes);
1022   fill_select_type (&except_set, excepts);
1023
1024   if (SCM_UNBNDP (secs))
1025     time_p = 0;
1026   else
1027     {
1028       SCM_ASSERT (SCM_INUMP (secs), secs, SCM_ARG4, s_sys_select);
1029       if (SCM_UNBNDP (msecs))
1030         msecs = SCM_INUM0;
1031       else
1032         SCM_ASSERT (SCM_INUMP (msecs), msecs, SCM_ARG5, s_sys_select);
1033
1034       timeout.tv_sec = SCM_INUM (secs);
1035       timeout.tv_usec = 1000 * SCM_INUM (msecs);
1036       time_p = &timeout;
1037     }
1038
1039   SCM_DEFER_INTS;
1040   sreturn = select (SELECT_SET_SIZE,
1041                     &read_set, &write_set, &except_set, time_p);
1042   if (sreturn < 0)
1043     scm_syserror (s_sys_select);
1044   SCM_ALLOW_INTS;
1045   return scm_listify (retrieve_select_type (&read_set, reads),
1046                       retrieve_select_type (&write_set, writes),
1047                       retrieve_select_type (&except_set, excepts),
1048                       SCM_UNDEFINED);
1049 #else
1050   scm_sysmissing (s_sys_select);
1051   /* not reached.  */
1052   return SCM_BOOL_F;
1053 #endif
1054 }
1055
1056 /* Check if FILE has characters waiting to be read.  */
1057
1058 #ifdef __IBMC__
1059 # define MSDOS
1060 #endif
1061 #ifdef MSDOS
1062 # ifndef GO32
1063 #  include <io.h>
1064 #  include <conio.h>
1065
1066 int
1067 scm_input_waiting_p (f, caller)
1068      FILE *f;
1069      char *caller;
1070 {
1071   if (feof (f))
1072     return 1;
1073   if (fileno (f) == fileno (stdin) && (isatty (fileno (stdin))))
1074     return kbhit ();
1075   return -1;
1076 }
1077
1078 # endif
1079 #else
1080 # ifdef _DCC
1081 #  include <ioctl.h>
1082 # else
1083 #  ifndef AMIGA
1084 #   ifndef vms
1085 #    ifdef MWC
1086 #     include <sys/io.h>
1087 #    else
1088 #     ifndef THINK_C
1089 #      ifndef ARM_ULIB
1090 #       include <sys/ioctl.h>
1091 #      endif
1092 #     endif
1093 #    endif
1094 #   endif
1095 #  endif
1096 # endif
1097
1098 int
1099 scm_input_waiting_p (f, caller)
1100      FILE *f;
1101      char *caller;
1102 {
1103   /* Can we return an end-of-file character? */
1104   if (feof (f))
1105     return 1;
1106
1107   /* Do we have characters in the stdio buffer? */
1108 # ifdef FILE_CNT_FIELD
1109   if (f->FILE_CNT_FIELD > 0)
1110     return 1;
1111 # else
1112 #  ifdef FILE_CNT_GPTR
1113   if (f->_gptr != f->_egptr)
1114     return 1;
1115 # else
1116 #   ifdef FILE_CNT_READPTR
1117   if (f->_IO_read_end != f->_IO_read_ptr)
1118     return 1;
1119 #   else
1120   Configure.in could not guess the name of the correct field in a FILE *.
1121   This function needs to be ported to your system.
1122   It should return zero iff no characters are waiting to be read.;
1123 #   endif
1124 #  endif
1125 # endif
1126
1127   /* Is the file prepared to deliver input? */
1128 # ifdef FIONREAD
1129   {
1130     long remir;
1131     ioctl(fileno(f), FIONREAD, &remir);
1132     return remir;
1133   }
1134 # else
1135 #  ifdef HAVE_SELECT
1136   {
1137     struct timeval timeout;
1138     SELECT_TYPE read_set;
1139     SELECT_TYPE write_set;
1140     SELECT_TYPE except_set;
1141     int fno = fileno ((FILE *)f);
1142
1143     FD_ZERO (&read_set);
1144     FD_ZERO (&write_set);
1145     FD_ZERO (&except_set);
1146
1147     FD_SET (fno, &read_set);
1148
1149     timeout.tv_sec = 0;
1150     timeout.tv_usec = 0;
1151
1152     SCM_DEFER_INTS;
1153     if (select (SELECT_SET_SIZE,
1154                 &read_set, &write_set, &except_set, &timeout)
1155         < 0)
1156       scm_syserror (caller);
1157     SCM_ALLOW_INTS;
1158     return FD_ISSET (fno, &read_set);
1159   }
1160 #  else
1161     return -1;
1162 #  endif
1163 # endif
1164 }
1165 #endif
1166
1167 \f
1168 /* {Symbolic Links}
1169  */
1170
1171 SCM_PROC (s_sys_symlink, "symlink", 2, 0, 0, scm_sys_symlink);
1172
1173 SCM
1174 scm_sys_symlink(oldpath, newpath)
1175      SCM oldpath;
1176      SCM newpath;
1177 {
1178 #ifdef HAVE_SYMLINK
1179   int val;
1180
1181   SCM_ASSERT(SCM_NIMP(oldpath) && SCM_STRINGP(oldpath), oldpath, SCM_ARG1, s_sys_symlink);
1182   SCM_ASSERT(SCM_NIMP(newpath) && SCM_STRINGP(newpath), newpath, SCM_ARG2, s_sys_symlink);
1183   SCM_SYSCALL (val = symlink(SCM_CHARS(oldpath), SCM_CHARS(newpath)));
1184   if (val != 0)
1185     scm_syserror (s_sys_symlink);
1186   return SCM_UNSPECIFIED;
1187 #else
1188   scm_sysmissing (s_sys_symlink);
1189   /* not reached.  */
1190   return SCM_BOOL_F;
1191 #endif
1192 }
1193
1194
1195 SCM_PROC (s_sys_readlink, "readlink", 1, 0, 0, scm_sys_readlink);
1196
1197 SCM
1198 scm_sys_readlink(path)
1199   SCM path;
1200 {
1201 #ifdef HAVE_READLINK
1202   scm_sizet rv;
1203   scm_sizet size = 100;
1204   char *buf;
1205   SCM result;
1206   SCM_ASSERT (SCM_NIMP (path) && SCM_STRINGP (path),  path, (char *) SCM_ARG1, s_sys_readlink);
1207   SCM_DEFER_INTS;
1208   buf = scm_must_malloc (size, s_sys_readlink);
1209   while ((rv = readlink (SCM_CHARS (path), buf, (scm_sizet) size)) == size)
1210     {
1211       scm_must_free (buf);
1212       size *= 2;
1213       buf = scm_must_malloc (size, s_sys_readlink);
1214     }
1215   if (rv == -1)
1216     scm_syserror (s_sys_readlink);
1217   result = scm_makfromstr (buf, rv, 0);
1218   scm_must_free (buf);
1219   SCM_ALLOW_INTS;
1220   return result;
1221 #else
1222   scm_sysmissing (s_sys_readlink);
1223   /* not reached.  */
1224   return SCM_BOOL_F;
1225 #endif
1226 }
1227
1228
1229 SCM_PROC (s_sys_lstat, "lstat", 1, 0, 0, scm_sys_lstat);
1230
1231 SCM
1232 scm_sys_lstat(str)
1233   SCM str;
1234 {
1235 #ifdef HAVE_LSTAT
1236   int rv;
1237   struct stat stat_temp;
1238
1239   SCM_ASSERT(SCM_NIMP(str) && SCM_STRINGP(str), str, (char *)SCM_ARG1, s_sys_lstat);
1240   SCM_SYSCALL(rv = lstat(SCM_CHARS(str), &stat_temp));
1241   if (rv != 0)
1242     scm_syserror_msg (s_sys_lstat, "%s: %S",
1243                       scm_listify (scm_makfrom0str (strerror (errno)),
1244                                    str,
1245                                    SCM_UNDEFINED));
1246   return scm_stat2scm(&stat_temp);
1247 #else
1248   scm_sysmissing (s_sys_lstat);
1249   /* not reached.  */
1250   return SCM_BOOL_F;
1251 #endif
1252 }
1253
1254
1255 SCM_PROC (s_sys_copy_file, "copy-file", 2, 0, 0, scm_sys_copy_file);
1256
1257 SCM
1258 scm_sys_copy_file (oldfile, newfile)
1259      SCM oldfile;
1260      SCM newfile;
1261 {
1262   int oldfd, newfd;
1263   int n;
1264   char buf[BUFSIZ];             /* this space could be shared.  */
1265   struct stat oldstat;
1266
1267   SCM_ASSERT (SCM_NIMP (oldfile) && SCM_ROSTRINGP (oldfile), oldfile, SCM_ARG1, s_sys_copy_file);
1268   if (SCM_SUBSTRP (oldfile))
1269     oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0);
1270   SCM_ASSERT (SCM_NIMP (newfile) && SCM_ROSTRINGP (newfile), newfile, SCM_ARG2, s_sys_copy_file);
1271   if (SCM_SUBSTRP (newfile))
1272     newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0);
1273   if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1)
1274     scm_syserror (s_sys_copy_file);
1275   SCM_DEFER_INTS;
1276   oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY);
1277   if (oldfd == -1)
1278     scm_syserror (s_sys_copy_file);
1279
1280   /* use POSIX flags instead of 07777?.  */
1281   newfd = open (SCM_ROCHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
1282                 oldstat.st_mode & 07777);
1283   if (newfd == -1)
1284     scm_syserror (s_sys_copy_file);
1285
1286   while ((n = read (oldfd, buf, sizeof buf)) > 0)
1287     if (write (newfd, buf, n) != n)
1288       {
1289         close (oldfd);
1290         close (newfd);
1291         scm_syserror (s_sys_copy_file);
1292       }
1293   close (oldfd);
1294   if (close (newfd) == -1)
1295     scm_syserror (s_sys_copy_file);
1296   SCM_ALLOW_INTS;
1297   return SCM_UNSPECIFIED;
1298 }
1299
1300 \f
1301
1302 void
1303 scm_init_filesys ()
1304 {
1305   scm_add_feature ("i/o-extensions");
1306
1307   scm_tc16_fd = scm_newsmob (&fd_smob);
1308   scm_tc16_dir = scm_newsmob (&dir_smob);
1309
1310 #include "filesys.x"
1311 }