libguile/filesys.c

   1 /*      Copyright (C) 1996, 1997 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, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  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.
  40  * If you do not wish that, delete this exception notice.  */
  41 \f
  42 #include <stdio.h>
  43 #include "_scm.h"
  44 #include "genio.h"
  45 #include "smob.h"
  46 #include "feature.h"
  47 #include "fports.h"
  48
  49 #include "filesys.h"
  50 \f
  51 #ifdef TIME_WITH_SYS_TIME
  52 # include <sys/time.h>
  53 # include <time.h>
  54 #else
  55 # if HAVE_SYS_TIME_H
  56 #  include <sys/time.h>
  57 # else
  58 #  include <time.h>
  59 # endif
  60 #endif
  61
  62 #ifdef HAVE_UNISTD_H
  63 #include <unistd.h>
  64 #endif
  65
  66 #ifdef LIBC_H_WITH_UNISTD_H
  67 #include <libc.h>
  68 #endif
  69
  70 #ifdef HAVE_SYS_SELECT_H
  71 #include <sys/select.h>
  72 #endif
  73
  74 #ifdef HAVE_STRING_H
  75 #include <string.h>
  76 #endif
  77
  78 #include <sys/types.h>
  79 #include <sys/stat.h>
  80 #include <fcntl.h>
  81
  82 #include <pwd.h>
  83
  84
  85 #ifdef FD_SET
  86
  87 #define SELECT_TYPE fd_set
  88 #define SELECT_SET_SIZE FD_SETSIZE
  89
  90 #else /* no FD_SET */
  91
  92 /* Define the macros to access a single-int bitmap of descriptors.  */
  93 #define SELECT_SET_SIZE 32
  94 #define SELECT_TYPE int
  95 #define FD_SET(n, p) (*(p) |= (1 << (n)))
  96 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
  97 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
  98 #define FD_ZERO(p) (*(p) = 0)
  99
 100 #endif /* no FD_SET */
 101
 102 #if HAVE_DIRENT_H
 103 # include <dirent.h>
 104 # define NAMLEN(dirent) strlen((dirent)->d_name)
 105 #else
 106 # define dirent direct
 107 # define NAMLEN(dirent) (dirent)->d_namlen
 108 # if HAVE_SYS_NDIR_H
 109 #  include <sys/ndir.h>
 110 # endif
 111 # if HAVE_SYS_DIR_H
 112 #  include <sys/dir.h>
 113 # endif
 114 # if HAVE_NDIR_H
 115 #  include <ndir.h>
 116 # endif
 117 #endif
 118
 119 /* Ultrix has S_IFSOCK, but no S_ISSOCK.  Ipe!  */
 120 #if defined (S_IFSOCK) && ! defined (S_ISSOCK)
 121 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 122 #endif
 123 \f
 124
 125
 126 \f
 127
 128 /* {Permissions}
 129  */
 130
 131 SCM_PROC (s_chown, "chown", 3, 0, 0, scm_chown);
 132
 133 SCM
 134 scm_chown (path, owner, group)
 135      SCM path;
 136      SCM owner;
 137      SCM group;
 138 {
 139   int val;
 140
 141   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1, s_chown);
 142   SCM_ASSERT (SCM_INUMP (owner), owner, SCM_ARG2, s_chown);
 143   SCM_ASSERT (SCM_INUMP (group), group, SCM_ARG3, s_chown);
 144
 145   SCM_COERCE_SUBSTR (path);
 146   SCM_SYSCALL (val = chown (SCM_ROCHARS (path),
 147                             SCM_INUM (owner), SCM_INUM (group)));
 148   if (val != 0)
 149     scm_syserror (s_chown);
 150   return SCM_UNSPECIFIED;
 151 }
 152
 153
 154 SCM_PROC (s_chmod, "chmod", 2, 0, 0, scm_chmod);
 155
 156 SCM
 157 scm_chmod (port_or_path, mode)
 158      SCM port_or_path;
 159      SCM mode;
 160 {
 161   int rv;
 162   SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_chmod);
 163   SCM_ASSERT (SCM_NIMP (port_or_path), port_or_path, SCM_ARG1, s_chmod);
 164   if (SCM_ROSTRINGP (port_or_path))
 165     {
 166       SCM_COERCE_SUBSTR (port_or_path);
 167       SCM_SYSCALL (rv = chmod (SCM_ROCHARS (port_or_path), SCM_INUM (mode)));
 168     }
 169   else
 170     {
 171       SCM_ASSERT (SCM_OPFPORTP (port_or_path), port_or_path, SCM_ARG1, s_chmod);
 172       rv = fileno ((FILE *)SCM_STREAM (port_or_path));
 173       if (rv != -1)
 174         SCM_SYSCALL (rv = fchmod (rv, SCM_INUM (mode)));
 175     }
 176   if (rv != 0)
 177     scm_syserror (s_chmod);
 178   return SCM_UNSPECIFIED;
 179 }
 180
 181 SCM_PROC (s_umask, "umask", 0, 1, 0, scm_umask);
 182
 183 SCM
 184 scm_umask (mode)
 185      SCM mode;
 186 {
 187   mode_t mask;
 188   if (SCM_UNBNDP (mode))
 189     {
 190       mask = umask (0);
 191       umask (mask);
 192     }
 193   else
 194     {
 195       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG1, s_umask);
 196       mask = umask (SCM_INUM (mode));
 197     }
 198   return SCM_MAKINUM (mask);
 199 }
 200
 201 \f
 202
 203 SCM_PROC (s_open, "open", 2, 1, 0, scm_open);
 204
 205 SCM
 206 scm_open (path, flags, mode)
 207      SCM path;
 208      SCM flags;
 209      SCM mode;
 210 {
 211   int fd;
 212   SCM newpt;
 213   FILE *f;
 214   char *port_mode;
 215   int iflags;
 216
 217   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1, s_open);
 218   iflags = scm_num2long (flags, (char *) SCM_ARG2, s_open);
 219
 220   if (SCM_SUBSTRP (path))
 221     path = scm_makfromstr (SCM_ROCHARS (path), SCM_ROLENGTH (path), 0);
 222
 223   SCM_DEFER_INTS;
 224   if (SCM_UNBNDP (mode))
 225     SCM_SYSCALL (fd = open (SCM_ROCHARS (path), iflags));
 226   else
 227     {
 228       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG3, s_open);
 229       SCM_SYSCALL (fd = open (SCM_ROCHARS (path), iflags, SCM_INUM (mode)));
 230     }
 231   if (fd == -1)
 232     scm_syserror (s_open);
 233   SCM_NEWCELL (newpt);
 234   if (iflags & O_RDWR)
 235     port_mode = "r+";
 236   else {
 237     if (iflags & O_WRONLY)
 238       port_mode = "w";
 239     else
 240       port_mode = "r";
 241   }
 242   f = fdopen (fd, port_mode);
 243   if (!f)
 244     {
 245       SCM_SYSCALL (close (fd));
 246       scm_syserror (s_open);
 247     }
 248   {
 249     struct scm_port_table * pt;
 250
 251     pt = scm_add_to_port_table (newpt);
 252     SCM_SETPTAB_ENTRY (newpt, pt);
 253     SCM_SETCAR (newpt, scm_tc16_fport | scm_mode_bits (port_mode));
 254     /* if (SCM_BUF0 & SCM_CAR (newpt))
 255        scm_setbuf0 (newpt); */
 256     SCM_SETSTREAM (newpt, (SCM)f);
 257     SCM_PTAB_ENTRY (newpt)->file_name = path;
 258   }
 259   SCM_ALLOW_INTS;
 260
 261   return newpt;
 262 }
 263
 264 \f
 265 /* {Files}
 266  */
 267
 268 SCM_SYMBOL (scm_sym_regular, "regular");
 269 SCM_SYMBOL (scm_sym_directory, "directory");
 270 SCM_SYMBOL (scm_sym_symlink, "symlink");
 271 SCM_SYMBOL (scm_sym_block_special, "block-special");
 272 SCM_SYMBOL (scm_sym_char_special, "char-special");
 273 SCM_SYMBOL (scm_sym_fifo, "fifo");
 274 SCM_SYMBOL (scm_sym_sock, "socket");
 275 SCM_SYMBOL (scm_sym_unknown, "unknown");
 276
 277 static SCM scm_stat2scm SCM_P ((struct stat *stat_temp));
 278
 279 static SCM
 280 scm_stat2scm (stat_temp)
 281      struct stat *stat_temp;
 282 {
 283   SCM ans = scm_make_vector (SCM_MAKINUM (15), SCM_UNSPECIFIED, SCM_BOOL_F);
 284   SCM *ve = SCM_VELTS (ans);
 285
 286   ve[0] = scm_ulong2num ((unsigned long) stat_temp->st_dev);
 287   ve[1] = scm_ulong2num ((unsigned long) stat_temp->st_ino);
 288   ve[2] = scm_ulong2num ((unsigned long) stat_temp->st_mode);
 289   ve[3] = scm_ulong2num ((unsigned long) stat_temp->st_nlink);
 290   ve[4] = scm_ulong2num ((unsigned long) stat_temp->st_uid);
 291   ve[5] = scm_ulong2num ((unsigned long) stat_temp->st_gid);
 292 #ifdef HAVE_ST_RDEV
 293   ve[6] = scm_ulong2num ((unsigned long) stat_temp->st_rdev);
 294 #else
 295   ve[6] = SCM_BOOL_F;
 296 #endif
 297   ve[7] = scm_ulong2num ((unsigned long) stat_temp->st_size);
 298   ve[8] = scm_ulong2num ((unsigned long) stat_temp->st_atime);
 299   ve[9] = scm_ulong2num ((unsigned long) stat_temp->st_mtime);
 300   ve[10] = scm_ulong2num ((unsigned long) stat_temp->st_ctime);
 301 #ifdef HAVE_ST_BLKSIZE
 302   ve[11] = scm_ulong2num ((unsigned long) stat_temp->st_blksize);
 303 #else
 304   ve[11] = scm_ulong2num (4096L);
 305 #endif
 306 #ifdef HAVE_ST_BLOCKS
 307   ve[12] = scm_ulong2num ((unsigned long) stat_temp->st_blocks);
 308 #else
 309   ve[12] = SCM_BOOL_F;
 310 #endif
 311   {
 312     int mode = stat_temp->st_mode;
 313
 314     if (S_ISREG (mode))
 315       ve[13] = scm_sym_regular;
 316     else if (S_ISDIR (mode))
 317       ve[13] = scm_sym_directory;
 318     else if (S_ISLNK (mode))
 319       ve[13] = scm_sym_symlink;
 320     else if (S_ISBLK (mode))
 321       ve[13] = scm_sym_block_special;
 322     else if (S_ISCHR (mode))
 323       ve[13] = scm_sym_char_special;
 324     else if (S_ISFIFO (mode))
 325       ve[13] = scm_sym_fifo;
 326     else if (S_ISSOCK (mode))
 327       ve[13] = scm_sym_sock;
 328     else
 329       ve[13] = scm_sym_unknown;
 330
 331     ve[14] = SCM_MAKINUM ((~S_IFMT) & mode);
 332
 333     /* the layout of the bits in ve[14] is intended to be portable.
 334        If there are systems that don't follow the usual convention,
 335        the following could be used:
 336
 337        tmp = 0;
 338        if (S_ISUID & mode) tmp += 1;
 339        tmp <<= 1;
 340        if (S_IRGRP & mode) tmp += 1;
 341        tmp <<= 1;
 342        if (S_ISVTX & mode) tmp += 1;
 343        tmp <<= 1;
 344        if (S_IRUSR & mode) tmp += 1;
 345        tmp <<= 1;
 346        if (S_IWUSR & mode) tmp += 1;
 347        tmp <<= 1;
 348        if (S_IXUSR & mode) tmp += 1;
 349        tmp <<= 1;
 350        if (S_IWGRP & mode) tmp += 1;
 351        tmp <<= 1;
 352        if (S_IXGRP & mode) tmp += 1;
 353        tmp <<= 1;
 354        if (S_IROTH & mode) tmp += 1;
 355        tmp <<= 1;
 356        if (S_IWOTH & mode) tmp += 1;
 357        tmp <<= 1;
 358        if (S_IXOTH & mode) tmp += 1;
 359
 360        ve[14] = SCM_MAKINUM (tmp);
 361
 362        */
 363   }
 364
 365   return ans;
 366 }
 367
 368 SCM_PROC (s_stat, "stat", 1, 0, 0, scm_stat);
 369
 370 SCM
 371 scm_stat (file)
 372      SCM file;
 373 {
 374   int rv = 1;
 375   struct stat stat_temp;
 376
 377   if (SCM_INUMP (file))
 378     SCM_SYSCALL (rv = fstat (SCM_INUM (file), &stat_temp));
 379   else
 380     {
 381       SCM_ASSERT (SCM_NIMP (file), file, SCM_ARG1, s_stat);
 382       if (SCM_FPORTP (file))
 383         SCM_SYSCALL (rv = fstat (fileno ((FILE *) SCM_STREAM (file)),
 384                                  &stat_temp));
 385       else
 386         {
 387           SCM_ASSERT (SCM_ROSTRINGP (file), file, SCM_ARG1, s_stat);
 388           if (SCM_SUBSTRP (file))
 389             file = scm_makfromstr (SCM_ROCHARS (file),
 390                                    SCM_ROLENGTH (file),
 391                                    0);
 392           SCM_SYSCALL (rv = stat (SCM_CHARS (file), &stat_temp));
 393         }
 394     }
 395   if (rv != 0)
 396     {
 397       int en = errno;
 398
 399       scm_syserror_msg (s_stat, "%s: %S",
 400                         scm_listify (scm_makfrom0str (strerror (errno)),
 401                                      file,
 402                                      SCM_UNDEFINED),
 403                         en);
 404     }
 405   return scm_stat2scm (&stat_temp);
 406 }
 407
 408
 409 \f
 410 /* {Modifying Directories}
 411  */
 412
 413 SCM_PROC (s_link, "link", 2, 0, 0, scm_link);
 414
 415 SCM
 416 scm_link (oldpath, newpath)
 417      SCM oldpath;
 418      SCM newpath;
 419 {
 420   int val;
 421
 422   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1, s_link);
 423   if (SCM_SUBSTRP (oldpath))
 424     oldpath = scm_makfromstr (SCM_ROCHARS (oldpath), SCM_ROLENGTH (oldpath), 0);
 425   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2, s_link);
 426   if (SCM_SUBSTRP (newpath))
 427     newpath = scm_makfromstr (SCM_ROCHARS (newpath), SCM_ROLENGTH (newpath), 0);
 428   SCM_SYSCALL (val = link (SCM_ROCHARS (oldpath), SCM_ROCHARS (newpath)));
 429   if (val != 0)
 430     scm_syserror (s_link);
 431   return SCM_UNSPECIFIED;
 432 }
 433
 434
 435
 436 SCM_PROC (s_rename, "rename-file", 2, 0, 0, scm_rename);
 437
 438 SCM
 439 scm_rename (oldname, newname)
 440      SCM oldname;
 441      SCM newname;
 442 {
 443   int rv;
 444   SCM_ASSERT (SCM_NIMP (oldname) && SCM_ROSTRINGP (oldname), oldname, SCM_ARG1,
 445               s_rename);
 446   SCM_ASSERT (SCM_NIMP (newname) && SCM_ROSTRINGP (newname), newname, SCM_ARG2,
 447               s_rename);
 448   SCM_COERCE_SUBSTR (oldname);
 449   SCM_COERCE_SUBSTR (newname);
 450 #ifdef HAVE_RENAME
 451   SCM_SYSCALL (rv = rename (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
 452   if (rv != 0)
 453     scm_syserror (s_rename);
 454   return SCM_UNSPECIFIED;
 455 #else
 456   SCM_DEFER_INTS;
 457   SCM_SYSCALL (rv = link (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
 458   if (rv == 0)
 459     {
 460       SCM_SYSCALL (rv = unlink (SCM_ROCHARS (oldname)));;
 461       if (rv != 0)
 462         /* unlink failed.  remove new name */
 463         SCM_SYSCALL (unlink (SCM_ROCHARS (newname)));
 464     }
 465   SCM_ALLOW_INTS;
 466   if (rv != 0)
 467     scm_syserror (s_rename);
 468   return SCM_UNSPECIFIED;
 469 #endif
 470 }
 471
 472
 473 SCM_PROC(s_delete_file, "delete-file", 1, 0, 0, scm_delete_file);
 474
 475 SCM
 476 scm_delete_file (str)
 477      SCM str;
 478 {
 479   int ans;
 480   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_delete_file);
 481   SCM_COERCE_SUBSTR (str);
 482   SCM_SYSCALL (ans = unlink (SCM_ROCHARS (str)));
 483   if (ans != 0)
 484     scm_syserror (s_delete_file);
 485   return SCM_UNSPECIFIED;
 486 }
 487
 488
 489 SCM_PROC (s_mkdir, "mkdir", 1, 1, 0, scm_mkdir);
 490
 491 SCM
 492 scm_mkdir (path, mode)
 493      SCM path;
 494      SCM mode;
 495 {
 496 #ifdef HAVE_MKDIR
 497   int rv;
 498   mode_t mask;
 499   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 500               s_mkdir);
 501   SCM_COERCE_SUBSTR (path);
 502   if (SCM_UNBNDP (mode))
 503     {
 504       mask = umask (0);
 505       umask (mask);
 506       SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), 0777 ^ mask));
 507     }
 508   else
 509     {
 510       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_mkdir);
 511       SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), SCM_INUM (mode)));
 512     }
 513   if (rv != 0)
 514     scm_syserror (s_mkdir);
 515   return SCM_UNSPECIFIED;
 516 #else
 517   scm_sysmissing (s_mkdir);
 518   /* not reached.  */
 519   return SCM_BOOL_F;
 520 #endif
 521 }
 522
 523
 524 SCM_PROC (s_rmdir, "rmdir", 1, 0, 0, scm_rmdir);
 525
 526 SCM
 527 scm_rmdir (path)
 528      SCM path;
 529 {
 530 #ifdef HAVE_RMDIR
 531   int val;
 532
 533   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 534               s_rmdir);
 535   SCM_COERCE_SUBSTR (path);
 536   SCM_SYSCALL (val = rmdir (SCM_ROCHARS (path)));
 537   if (val != 0)
 538     scm_syserror (s_rmdir);
 539   return SCM_UNSPECIFIED;
 540 #else
 541   scm_sysmissing (s_rmdir);
 542   /* not reached.  */
 543   return SCM_BOOL_F;
 544 #endif
 545 }
 546
 547 \f
 548 /* {Examining Directories}
 549  */
 550
 551 long scm_tc16_dir;
 552
 553 SCM_PROC (s_opendir, "opendir", 1, 0, 0, scm_opendir);
 554
 555 SCM
 556 scm_opendir (dirname)
 557      SCM dirname;
 558 {
 559   DIR *ds;
 560   SCM dir;
 561   SCM_ASSERT (SCM_NIMP (dirname) && SCM_ROSTRINGP (dirname), dirname, SCM_ARG1,
 562               s_opendir);
 563   SCM_COERCE_SUBSTR (dirname);
 564   SCM_NEWCELL (dir);
 565   SCM_DEFER_INTS;
 566   SCM_SYSCALL (ds = opendir (SCM_ROCHARS (dirname)));
 567   if (ds == NULL)
 568     scm_syserror (s_opendir);
 569   SCM_SETCAR (dir, scm_tc16_dir | SCM_OPN);
 570   SCM_SETCDR (dir, ds);
 571   SCM_ALLOW_INTS;
 572   return dir;
 573 }
 574
 575
 576 SCM_PROC (s_readdir, "readdir", 1, 0, 0, scm_readdir);
 577
 578 SCM
 579 scm_readdir (port)
 580      SCM port;
 581 {
 582   struct dirent *rdent;
 583   SCM_DEFER_INTS;
 584   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_readdir);
 585   errno = 0;
 586   SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port)));
 587   SCM_ALLOW_INTS;
 588   if (errno != 0)
 589     scm_syserror (s_readdir);
 590   return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0)
 591           : SCM_EOF_VAL);
 592 }
 593
 594
 595
 596 SCM_PROC (s_rewinddir, "rewinddir", 1, 0, 0, scm_rewinddir);
 597
 598 SCM
 599 scm_rewinddir (port)
 600      SCM port;
 601 {
 602   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_rewinddir);
 603   rewinddir ((DIR *) SCM_CDR (port));
 604   return SCM_UNSPECIFIED;
 605 }
 606
 607
 608
 609 SCM_PROC (s_closedir, "closedir", 1, 0, 0, scm_closedir);
 610
 611 SCM
 612 scm_closedir (port)
 613      SCM port;
 614 {
 615   int sts;
 616
 617   SCM_ASSERT (SCM_NIMP (port) && SCM_DIRP (port), port, SCM_ARG1, s_closedir);
 618   SCM_DEFER_INTS;
 619   if (SCM_CLOSEDP (port))
 620     {
 621       SCM_ALLOW_INTS;
 622       return SCM_UNSPECIFIED;
 623     }
 624   SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port)));
 625   if (sts != 0)
 626     scm_syserror (s_closedir);
 627   SCM_SETCAR (port, scm_tc16_dir);
 628   SCM_ALLOW_INTS;
 629   return SCM_UNSPECIFIED;
 630 }
 631
 632
 633
 634
 635 static int scm_dir_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
 636
 637 static int
 638 scm_dir_print (sexp, port, pstate)
 639      SCM sexp;
 640      SCM port;
 641      scm_print_state *pstate;
 642 {
 643   scm_prinport (sexp, port, "directory");
 644   return 1;
 645 }
 646
 647
 648 static scm_sizet scm_dir_free SCM_P ((SCM p));
 649
 650 static scm_sizet
 651 scm_dir_free (p)
 652      SCM p;
 653 {
 654   if (SCM_OPENP (p))
 655     closedir ((DIR *) SCM_CDR (p));
 656   return 0;
 657 }
 658
 659 static scm_smobfuns dir_smob = {scm_mark0, scm_dir_free, scm_dir_print, 0};
 660
 661 \f
 662 /* {Navigating Directories}
 663  */
 664
 665
 666 SCM_PROC (s_chdir, "chdir", 1, 0, 0, scm_chdir);
 667
 668 SCM
 669 scm_chdir (str)
 670      SCM str;
 671 {
 672   int ans;
 673
 674   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_chdir);
 675   SCM_COERCE_SUBSTR (str);
 676   SCM_SYSCALL (ans = chdir (SCM_ROCHARS (str)));
 677   if (ans != 0)
 678     scm_syserror (s_chdir);
 679   return SCM_UNSPECIFIED;
 680 }
 681
 682
 683
 684 SCM_PROC (s_getcwd, "getcwd", 0, 0, 0, scm_getcwd);
 685
 686 SCM
 687 scm_getcwd ()
 688 {
 689 #ifdef HAVE_GETCWD
 690   char *rv;
 691
 692   scm_sizet size = 100;
 693   char *wd;
 694   SCM result;
 695
 696   SCM_DEFER_INTS;
 697   wd = scm_must_malloc (size, s_getcwd);
 698   while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
 699     {
 700       scm_must_free (wd);
 701       size *= 2;
 702       wd = scm_must_malloc (size, s_getcwd);
 703     }
 704   if (rv == 0)
 705     scm_syserror (s_getcwd);
 706   result = scm_makfromstr (wd, strlen (wd), 0);
 707   scm_must_free (wd);
 708   SCM_ALLOW_INTS;
 709   return result;
 710 #else
 711   scm_sysmissing (s_getcwd);
 712   /* not reached.  */
 713   return SCM_BOOL_F;
 714 #endif
 715 }
 716
 717 \f
 718
 719
 720 static void
 721 set_element (SELECT_TYPE *set, SCM element)
 722 {
 723   if (SCM_NIMP (element) && SCM_TYP16 (element) == scm_tc16_fport
 724       && SCM_OPPORTP (element))
 725     FD_SET (fileno ((FILE *) SCM_STREAM (element)), set);
 726   else if (SCM_INUMP (element))
 727     FD_SET (SCM_INUM (element), set);
 728 }
 729
 730 static void
 731 fill_select_type (SELECT_TYPE *set, SCM list)
 732 {
 733   if (SCM_NIMP (list) && SCM_VECTORP (list))
 734     {
 735       int len = SCM_LENGTH (list);
 736       SCM *ve = SCM_VELTS (list);
 737
 738       while (len > 0)
 739         {
 740           set_element (set, ve[len - 1]);
 741           len--;
 742         }
 743     }
 744   else
 745     {
 746       while (list != SCM_EOL)
 747         {
 748           set_element (set, SCM_CAR (list));
 749           list = SCM_CDR (list);
 750         }
 751     }
 752 }
 753
 754 static SCM
 755 get_element (SELECT_TYPE *set, SCM element, SCM list)
 756 {
 757   if (SCM_NIMP (element)
 758       && (scm_tc16_fport == SCM_TYP16 (element))
 759       && SCM_OPPORTP (element))
 760     {
 761       if (FD_ISSET (fileno ((FILE *)SCM_STREAM (element)), set))
 762         list = scm_cons (element, list);
 763     }
 764   else if (SCM_INUMP (element))
 765     {
 766       if (FD_ISSET (SCM_INUM (element), set))
 767         list = scm_cons (element, list);
 768     }
 769   return list;
 770 }
 771
 772 static SCM
 773 retrieve_select_type (SELECT_TYPE *set, SCM list)
 774 {
 775   SCM answer_list = SCM_EOL;
 776
 777   if (SCM_NIMP (list) && SCM_VECTORP (list))
 778     {
 779       int len = SCM_LENGTH (list);
 780       SCM *ve = SCM_VELTS (list);
 781
 782       while (len > 0)
 783         {
 784           answer_list = get_element (set, ve[len - 1], answer_list);
 785           len--;
 786         }
 787       return scm_vector (answer_list);
 788     }
 789   else
 790     {
 791       /* list is a list.  */
 792       while (list != SCM_EOL)
 793         {
 794           answer_list = get_element (set, SCM_CAR (list), answer_list);
 795           list = SCM_CDR (list);
 796         }
 797       return answer_list;
 798     }
 799 }
 800
 801
 802 SCM_PROC (s_select, "select", 3, 2, 0, scm_select);
 803
 804 SCM
 805 scm_select (reads, writes, excepts, secs, usecs)
 806      SCM reads;
 807      SCM writes;
 808      SCM excepts;
 809      SCM secs;
 810      SCM usecs;
 811 {
 812 #ifdef HAVE_SELECT
 813   struct timeval timeout;
 814   struct timeval * time_p;
 815   SELECT_TYPE read_set;
 816   SELECT_TYPE write_set;
 817   SELECT_TYPE except_set;
 818   int sreturn;
 819
 820 #define assert_set(x, arg) \
 821   SCM_ASSERT (scm_ilength (x) > -1 || (SCM_NIMP (x) && SCM_VECTORP (x)), \
 822               x, arg, s_select)
 823   assert_set (reads, SCM_ARG1);
 824   assert_set (writes, SCM_ARG2);
 825   assert_set (excepts, SCM_ARG3);
 826 #undef assert_set
 827
 828   FD_ZERO (&read_set);
 829   FD_ZERO (&write_set);
 830   FD_ZERO (&except_set);
 831
 832   fill_select_type (&read_set, reads);
 833   fill_select_type (&write_set, writes);
 834   fill_select_type (&except_set, excepts);
 835
 836   if (SCM_UNBNDP (secs) || SCM_FALSEP (secs))
 837     time_p = 0;
 838   else
 839     {
 840       if (SCM_INUMP (secs))
 841         {
 842           timeout.tv_sec = SCM_INUM (secs);
 843           if (SCM_UNBNDP (usecs))
 844             timeout.tv_usec = 0;
 845           else
 846             {
 847               SCM_ASSERT (SCM_INUMP (usecs), usecs, SCM_ARG5, s_select);
 848
 849               timeout.tv_usec = SCM_INUM (usecs);
 850             }
 851         }
 852       else
 853         {
 854           double fl = scm_num2dbl (secs, s_select);
 855
 856           if (!SCM_UNBNDP (usecs))
 857             scm_wrong_type_arg (s_select, 4, secs);
 858           if (fl > LONG_MAX)
 859             scm_out_of_range (s_select, secs);
 860           timeout.tv_sec = (long) fl;
 861           timeout.tv_usec = (long) ((fl - timeout.tv_sec) * 1000000);
 862         }
 863       time_p = &timeout;
 864     }
 865
 866   SCM_DEFER_INTS;
 867   sreturn = select (SELECT_SET_SIZE,
 868                     &read_set, &write_set, &except_set, time_p);
 869   if (sreturn < 0)
 870     scm_syserror (s_select);
 871   SCM_ALLOW_INTS;
 872   return scm_listify (retrieve_select_type (&read_set, reads),
 873                       retrieve_select_type (&write_set, writes),
 874                       retrieve_select_type (&except_set, excepts),
 875                       SCM_UNDEFINED);
 876 #else
 877   scm_sysmissing (s_select);
 878   /* not reached.  */
 879   return SCM_BOOL_F;
 880 #endif
 881 }
 882
 883 /* Check if FILE has characters waiting to be read.  */
 884
 885 #ifdef __IBMC__
 886 # define MSDOS
 887 #endif
 888 #ifdef MSDOS
 889 # ifndef GO32
 890 #  include <io.h>
 891 #  include <conio.h>
 892
 893 int
 894 scm_input_waiting_p (f, caller)
 895      FILE *f;
 896      char *caller;
 897 {
 898   if (feof (f))
 899     return 1;
 900   if (fileno (f) == fileno (stdin) && (isatty (fileno (stdin))))
 901     return kbhit ();
 902   return -1;
 903 }
 904
 905 # endif
 906 #else
 907 # ifdef _DCC
 908 #  include <ioctl.h>
 909 # else
 910 #  ifndef AMIGA
 911 #   ifndef vms
 912 #    ifdef MWC
 913 #     include <sys/io.h>
 914 #    else
 915 #     ifndef THINK_C
 916 #      ifndef ARM_ULIB
 917 #       include <sys/ioctl.h>
 918 #      endif
 919 #     endif
 920 #    endif
 921 #   endif
 922 #  endif
 923 # endif
 924
 925 int
 926 scm_input_waiting_p (f, caller)
 927      FILE *f;
 928      char *caller;
 929 {
 930   /* Can we return an end-of-file character? */
 931   if (feof (f))
 932     return 1;
 933
 934   /* Do we have characters in the stdio buffer? */
 935 # ifdef FILE_CNT_FIELD
 936   if (f->FILE_CNT_FIELD > 0)
 937     return 1;
 938 # else
 939 #  ifdef FILE_CNT_GPTR
 940   if (f->_gptr != f->_egptr)
 941     return 1;
 942 # else
 943 #   ifdef FILE_CNT_READPTR
 944   if (f->_IO_read_end != f->_IO_read_ptr)
 945     return 1;
 946 #   else
 947   Configure.in could not guess the name of the correct field in a FILE *.
 948   This function needs to be ported to your system.
 949   It should return zero iff no characters are waiting to be read.;
 950 #   endif
 951 #  endif
 952 # endif
 953
 954   /* Is the file prepared to deliver input? */
 955 # ifdef HAVE_SELECT
 956   {
 957     struct timeval timeout;
 958     SELECT_TYPE read_set;
 959     SELECT_TYPE write_set;
 960     SELECT_TYPE except_set;
 961     int fno = fileno ((FILE *)f);
 962
 963     FD_ZERO (&read_set);
 964     FD_ZERO (&write_set);
 965     FD_ZERO (&except_set);
 966
 967     FD_SET (fno, &read_set);
 968
 969     timeout.tv_sec = 0;
 970     timeout.tv_usec = 0;
 971
 972     SCM_DEFER_INTS;
 973     if (select (SELECT_SET_SIZE,
 974                 &read_set, &write_set, &except_set, &timeout)
 975         < 0)
 976       scm_syserror (caller);
 977     SCM_ALLOW_INTS;
 978     return FD_ISSET (fno, &read_set);
 979   }
 980 # else
 981 # ifdef FIONREAD
 982   {
 983     long remir;
 984     ioctl(fileno(f), FIONREAD, &remir);
 985     return remir;
 986   }
 987 #  else
 988   scm_misc_error ("char-ready?", "Not fully implemented on this platform",
 989                   SCM_EOL);
 990 #  endif
 991 # endif
 992 }
 993 #endif
 994
 995 \f
 996
 997 SCM_PROC (s_fcntl, "fcntl", 3, 0, 0, scm_fcntl);
 998
 999 SCM
1000 scm_fcntl (port, cmd, value)
1001      SCM port;
1002      SCM cmd;
1003      SCM value;
1004 {
1005   int rv;
1006
1007   SCM_ASSERT (SCM_OPFPORTP (port), port, SCM_ARG1, s_fcntl);
1008   SCM_ASSERT (SCM_INUMP (cmd), cmd, SCM_ARG2, s_fcntl);
1009   SCM_ASSERT (SCM_INUMP (value), value, SCM_ARG3, s_fcntl);
1010
1011   rv = fileno ((FILE *)SCM_STREAM (port));
1012   if (rv != -1)
1013     SCM_SYSCALL (rv = fcntl (rv, SCM_INUM (cmd), SCM_INUM (value)));
1014   if (rv == -1)
1015     scm_syserror (s_fcntl);
1016   return SCM_MAKINUM (rv);
1017 }
1018 \f
1019 /* {Symbolic Links}
1020  */
1021
1022 SCM_PROC (s_symlink, "symlink", 2, 0, 0, scm_symlink);
1023
1024 SCM
1025 scm_symlink(oldpath, newpath)
1026      SCM oldpath;
1027      SCM newpath;
1028 {
1029 #ifdef HAVE_SYMLINK
1030   int val;
1031
1032   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1,
1033               s_symlink);
1034   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2,
1035               s_symlink);
1036   SCM_COERCE_SUBSTR (oldpath);
1037   SCM_COERCE_SUBSTR (newpath);
1038   SCM_SYSCALL (val = symlink(SCM_ROCHARS(oldpath), SCM_ROCHARS(newpath)));
1039   if (val != 0)
1040     scm_syserror (s_symlink);
1041   return SCM_UNSPECIFIED;
1042 #else
1043   scm_sysmissing (s_symlink);
1044   /* not reached.  */
1045   return SCM_BOOL_F;
1046 #endif
1047 }
1048
1049
1050 SCM_PROC (s_readlink, "readlink", 1, 0, 0, scm_readlink);
1051
1052 SCM
1053 scm_readlink(path)
1054   SCM path;
1055 {
1056 #ifdef HAVE_READLINK
1057   scm_sizet rv;
1058   scm_sizet size = 100;
1059   char *buf;
1060   SCM result;
1061   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, (char *) SCM_ARG1,
1062               s_readlink);
1063   SCM_COERCE_SUBSTR (path);
1064   SCM_DEFER_INTS;
1065   buf = scm_must_malloc (size, s_readlink);
1066   while ((rv = readlink (SCM_ROCHARS (path), buf, (scm_sizet) size)) == size)
1067     {
1068       scm_must_free (buf);
1069       size *= 2;
1070       buf = scm_must_malloc (size, s_readlink);
1071     }
1072   if (rv == -1)
1073     scm_syserror (s_readlink);
1074   result = scm_makfromstr (buf, rv, 0);
1075   scm_must_free (buf);
1076   SCM_ALLOW_INTS;
1077   return result;
1078 #else
1079   scm_sysmissing (s_readlink);
1080   /* not reached.  */
1081   return SCM_BOOL_F;
1082 #endif
1083 }
1084
1085
1086 SCM_PROC (s_lstat, "lstat", 1, 0, 0, scm_lstat);
1087
1088 SCM
1089 scm_lstat(str)
1090   SCM str;
1091 {
1092 #ifdef HAVE_LSTAT
1093   int rv;
1094   struct stat stat_temp;
1095
1096   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, (char *) SCM_ARG1,
1097               s_lstat);
1098   SCM_COERCE_SUBSTR (str);
1099   SCM_SYSCALL(rv = lstat(SCM_ROCHARS(str), &stat_temp));
1100   if (rv != 0)
1101     {
1102       int en = errno;
1103
1104       scm_syserror_msg (s_lstat, "%s: %S",
1105                         scm_listify (scm_makfrom0str (strerror (errno)),
1106                                      str,
1107                                      SCM_UNDEFINED),
1108                         en);
1109     }
1110   return scm_stat2scm(&stat_temp);
1111 #else
1112   scm_sysmissing (s_lstat);
1113   /* not reached.  */
1114   return SCM_BOOL_F;
1115 #endif
1116 }
1117
1118
1119 SCM_PROC (s_copy_file, "copy-file", 2, 0, 0, scm_copy_file);
1120
1121 SCM
1122 scm_copy_file (oldfile, newfile)
1123      SCM oldfile;
1124      SCM newfile;
1125 {
1126   int oldfd, newfd;
1127   int n;
1128   char buf[BUFSIZ];             /* this space could be shared.  */
1129   struct stat oldstat;
1130
1131   SCM_ASSERT (SCM_NIMP (oldfile) && SCM_ROSTRINGP (oldfile), oldfile, SCM_ARG1, s_copy_file);
1132   if (SCM_SUBSTRP (oldfile))
1133     oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0);
1134   SCM_ASSERT (SCM_NIMP (newfile) && SCM_ROSTRINGP (newfile), newfile, SCM_ARG2, s_copy_file);
1135   if (SCM_SUBSTRP (newfile))
1136     newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0);
1137   if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1)
1138     scm_syserror (s_copy_file);
1139   SCM_DEFER_INTS;
1140   oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY);
1141   if (oldfd == -1)
1142     scm_syserror (s_copy_file);
1143
1144   /* use POSIX flags instead of 07777?.  */
1145   newfd = open (SCM_ROCHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
1146                 oldstat.st_mode & 07777);
1147   if (newfd == -1)
1148     scm_syserror (s_copy_file);
1149
1150   while ((n = read (oldfd, buf, sizeof buf)) > 0)
1151     if (write (newfd, buf, n) != n)
1152       {
1153         close (oldfd);
1154         close (newfd);
1155         scm_syserror (s_copy_file);
1156       }
1157   close (oldfd);
1158   if (close (newfd) == -1)
1159     scm_syserror (s_copy_file);
1160   SCM_ALLOW_INTS;
1161   return SCM_UNSPECIFIED;
1162 }
1163
1164 \f
1165
1166 void
1167 scm_init_filesys ()
1168 {
1169   scm_add_feature ("i/o-extensions");
1170
1171   scm_tc16_dir = scm_newsmob (&dir_smob);
1172
1173 #ifdef O_RDONLY
1174 scm_sysintern ("O_RDONLY", scm_long2num (O_RDONLY));
1175 #endif
1176 #ifdef O_WRONLY
1177 scm_sysintern ("O_WRONLY", scm_long2num (O_WRONLY));
1178 #endif
1179 #ifdef O_RDWR
1180 scm_sysintern ("O_RDWR", scm_long2num (O_RDWR));
1181 #endif
1182 #ifdef O_CREAT
1183 scm_sysintern ("O_CREAT", scm_long2num (O_CREAT));
1184 #endif
1185 #ifdef O_EXCL
1186 scm_sysintern ("O_EXCL", scm_long2num (O_EXCL));
1187 #endif
1188 #ifdef O_NOCTTY
1189 scm_sysintern ("O_NOCTTY", scm_long2num (O_NOCTTY));
1190 #endif
1191 #ifdef O_TRUNC
1192 scm_sysintern ("O_TRUNC", scm_long2num (O_TRUNC));
1193 #endif
1194 #ifdef O_APPEND
1195 scm_sysintern ("O_APPEND", scm_long2num (O_APPEND));
1196 #endif
1197 #ifdef O_NONBLO
1198 scm_sysintern ("O_NONBLOCK", scm_long2num (O_NONBLOCK));
1199 #endif
1200 #ifdef O_NDELAY
1201 scm_sysintern ("O_NDELAY", scm_long2num (O_NDELAY));
1202 #endif
1203 #ifdef O_SYNC
1204 scm_sysintern ("O_SYNC", scm_long2num (O_SYNC));
1205 #endif
1206
1207 #ifdef F_DUPFD
1208 scm_sysintern ("F_DUPFD", scm_long2num (F_DUPFD));
1209 #endif
1210 #ifdef F_GETFD
1211 scm_sysintern ("F_GETFD", scm_long2num (F_GETFD));
1212 #endif
1213 #ifdef F_SETFD
1214 scm_sysintern ("F_SETFD", scm_long2num (F_SETFD));
1215 #endif
1216 #ifdef F_GETFL
1217 scm_sysintern ("F_GETFL", scm_long2num (F_GETFL));
1218 #endif
1219 #ifdef F_SETFL
1220 scm_sysintern ("F_SETFL", scm_long2num (F_SETFL));
1221 #endif
1222 #ifdef F_GETOWN
1223 scm_sysintern ("F_GETOWN", scm_long2num (F_GETOWN));
1224 #endif
1225 #ifdef F_SETOWN
1226 scm_sysintern ("F_SETOWN", scm_long2num (F_SETOWN));
1227 #endif
1228 #ifdef FD_CLOEXEC
1229 scm_sysintern ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC));
1230 #endif
1231
1232 #include "filesys.x"
1233 }