libguile/filesys.c

   1 /*      Copyright (C) 1996, 1997, 1998, 1999 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 #include "iselect.h"
  49
  50 #include "filesys.h"
  51
  52 \f
  53 #ifdef HAVE_IO_H
  54 #include <io.h>
  55 #endif
  56
  57 #ifdef TIME_WITH_SYS_TIME
  58 # include <sys/time.h>
  59 # include <time.h>
  60 #else
  61 # if HAVE_SYS_TIME_H
  62 #  include <sys/time.h>
  63 # else
  64 #  include <time.h>
  65 # endif
  66 #endif
  67
  68 #ifdef HAVE_UNISTD_H
  69 #include <unistd.h>
  70 #endif
  71
  72 #ifdef LIBC_H_WITH_UNISTD_H
  73 #include <libc.h>
  74 #endif
  75
  76 #ifdef HAVE_SYS_SELECT_H
  77 #include <sys/select.h>
  78 #endif
  79
  80 #ifdef HAVE_STRING_H
  81 #include <string.h>
  82 #endif
  83
  84 #include <sys/types.h>
  85 #include <sys/stat.h>
  86 #include <fcntl.h>
  87
  88 #include <pwd.h>
  89
  90
  91 #if HAVE_DIRENT_H
  92 # include <dirent.h>
  93 # define NAMLEN(dirent) strlen((dirent)->d_name)
  94 #else
  95 # define dirent direct
  96 # define NAMLEN(dirent) (dirent)->d_namlen
  97 # if HAVE_SYS_NDIR_H
  98 #  include <sys/ndir.h>
  99 # endif
 100 # if HAVE_SYS_DIR_H
 101 #  include <sys/dir.h>
 102 # endif
 103 # if HAVE_NDIR_H
 104 #  include <ndir.h>
 105 # endif
 106 #endif
 107
 108 /* Ultrix has S_IFSOCK, but no S_ISSOCK.  Ipe!  */
 109 #if defined (S_IFSOCK) && ! defined (S_ISSOCK)
 110 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 111 #endif
 112 \f
 113
 114
 115 \f
 116
 117 /* {Permissions}
 118  */
 119
 120 SCM_PROC (s_chown, "chown", 3, 0, 0, scm_chown);
 121
 122 SCM
 123 scm_chown (object, owner, group)
 124      SCM object;
 125      SCM owner;
 126      SCM group;
 127 {
 128   int rv;
 129   int fdes;
 130
 131   object = SCM_COERCE_OUTPORT (object);
 132
 133   SCM_ASSERT (SCM_INUMP (owner), owner, SCM_ARG2, s_chown);
 134   SCM_ASSERT (SCM_INUMP (group), group, SCM_ARG3, s_chown);
 135   if (SCM_INUMP (object) || (SCM_NIMP (object) && SCM_OPFPORTP (object)))
 136     {
 137       if (SCM_INUMP (object))
 138         fdes = SCM_INUM (object);
 139       else
 140         fdes = SCM_FPORT_FDES (object);
 141       SCM_SYSCALL (rv = fchown (fdes, SCM_INUM (owner), SCM_INUM (group)));
 142     }
 143   else
 144     {
 145       SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object),
 146                   object, SCM_ARG1, s_chown);
 147       SCM_COERCE_SUBSTR (object);
 148       SCM_SYSCALL (rv = chown (SCM_ROCHARS (object),
 149                                SCM_INUM (owner), SCM_INUM (group)));
 150     }
 151   if (rv == -1)
 152     scm_syserror (s_chown);
 153   return SCM_UNSPECIFIED;
 154 }
 155
 156
 157 SCM_PROC (s_chmod, "chmod", 2, 0, 0, scm_chmod);
 158
 159 SCM
 160 scm_chmod (object, mode)
 161      SCM object;
 162      SCM mode;
 163 {
 164   int rv;
 165   int fdes;
 166
 167   object = SCM_COERCE_OUTPORT (object);
 168
 169   SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_chmod);
 170   if (SCM_INUMP (object) || (SCM_NIMP (object) && SCM_OPFPORTP (object)))
 171     {
 172       if (SCM_INUMP (object))
 173         fdes = SCM_INUM (object);
 174       else
 175         fdes = SCM_FPORT_FDES (object);
 176       SCM_SYSCALL (rv = fchmod (fdes, SCM_INUM (mode)));
 177     }
 178   else
 179     {
 180       SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object),
 181                   object, SCM_ARG1, s_chmod);
 182       SCM_COERCE_SUBSTR (object);
 183       SCM_SYSCALL (rv = chmod (SCM_ROCHARS (object), SCM_INUM (mode)));
 184     }
 185   if (rv == -1)
 186     scm_syserror (s_chmod);
 187   return SCM_UNSPECIFIED;
 188 }
 189
 190 SCM_PROC (s_umask, "umask", 0, 1, 0, scm_umask);
 191
 192 SCM
 193 scm_umask (mode)
 194      SCM mode;
 195 {
 196   mode_t mask;
 197   if (SCM_UNBNDP (mode))
 198     {
 199       mask = umask (0);
 200       umask (mask);
 201     }
 202   else
 203     {
 204       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG1, s_umask);
 205       mask = umask (SCM_INUM (mode));
 206     }
 207   return SCM_MAKINUM (mask);
 208 }
 209
 210 \f
 211
 212 SCM_PROC (s_open_fdes, "open-fdes", 2, 1, 0, scm_open_fdes);
 213 SCM
 214 scm_open_fdes (SCM path, SCM flags, SCM mode)
 215 {
 216   int fd;
 217   int iflags;
 218   int imode;
 219
 220   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 221               s_open_fdes);
 222   SCM_COERCE_SUBSTR (path);
 223   iflags = scm_num2long (flags, (char *) SCM_ARG2, s_open_fdes);
 224
 225   if (SCM_UNBNDP (mode))
 226     imode = 0666;
 227   else
 228     {
 229       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG3, s_open_fdes);
 230       imode = SCM_INUM (mode);
 231     }
 232   SCM_SYSCALL (fd = open (SCM_ROCHARS (path), iflags, imode));
 233   if (fd == -1)
 234     scm_syserror (s_open_fdes);
 235   return SCM_MAKINUM (fd);
 236 }
 237
 238 SCM_PROC (s_open, "open", 2, 1, 0, scm_open);
 239 SCM
 240 scm_open (SCM path, SCM flags, SCM mode)
 241 {
 242   SCM newpt;
 243   char *port_mode;
 244   int fd;
 245   int iflags;
 246
 247   fd = SCM_INUM (scm_open_fdes (path, flags, mode));
 248   iflags = scm_num2long (flags, (char *) SCM_ARG2, s_open_fdes);
 249   if (iflags & O_RDWR)
 250     {
 251       if (iflags & O_APPEND)
 252         port_mode = "a+";
 253       else if (iflags & O_CREAT)
 254         port_mode = "w+";
 255       else
 256         port_mode = "r+";
 257     }
 258   else {
 259     if (iflags & O_APPEND)
 260       port_mode = "a";
 261     else if (iflags & O_WRONLY)
 262       port_mode = "w";
 263     else
 264       port_mode = "r";
 265   }
 266   newpt = scm_fdes_to_port (fd, port_mode, path);
 267   return newpt;
 268 }
 269
 270 SCM_PROC (s_close, "close", 1, 0, 0, scm_close);
 271 SCM
 272 scm_close (SCM fd_or_port)
 273 {
 274   int rv;
 275   int fd;
 276
 277   fd_or_port = SCM_COERCE_OUTPORT (fd_or_port);
 278
 279   if (SCM_NIMP (fd_or_port) && SCM_PORTP (fd_or_port))
 280     return scm_close_port (fd_or_port);
 281   SCM_ASSERT (SCM_INUMP (fd_or_port), fd_or_port, SCM_ARG1, s_close);
 282   fd = SCM_INUM (fd_or_port);
 283   scm_evict_ports (fd);         /* see scsh manual.  */
 284   SCM_SYSCALL (rv = close (fd));
 285   /* following scsh, closing an already closed file descriptor is
 286      not an error.  */
 287   if (rv < 0 && errno != EBADF)
 288     scm_syserror (s_close);
 289   return (rv < 0) ? SCM_BOOL_F : SCM_BOOL_T;
 290 }
 291
 292 \f
 293 /* {Files}
 294  */
 295
 296 SCM_SYMBOL (scm_sym_regular, "regular");
 297 SCM_SYMBOL (scm_sym_directory, "directory");
 298 #ifdef HAVE_S_ISLNK
 299 SCM_SYMBOL (scm_sym_symlink, "symlink");
 300 #endif
 301 SCM_SYMBOL (scm_sym_block_special, "block-special");
 302 SCM_SYMBOL (scm_sym_char_special, "char-special");
 303 SCM_SYMBOL (scm_sym_fifo, "fifo");
 304 SCM_SYMBOL (scm_sym_sock, "socket");
 305 SCM_SYMBOL (scm_sym_unknown, "unknown");
 306
 307 static SCM scm_stat2scm SCM_P ((struct stat *stat_temp));
 308
 309 static SCM
 310 scm_stat2scm (stat_temp)
 311      struct stat *stat_temp;
 312 {
 313   SCM ans = scm_make_vector (SCM_MAKINUM (15), SCM_UNSPECIFIED);
 314   SCM *ve = SCM_VELTS (ans);
 315
 316   ve[0] = scm_ulong2num ((unsigned long) stat_temp->st_dev);
 317   ve[1] = scm_ulong2num ((unsigned long) stat_temp->st_ino);
 318   ve[2] = scm_ulong2num ((unsigned long) stat_temp->st_mode);
 319   ve[3] = scm_ulong2num ((unsigned long) stat_temp->st_nlink);
 320   ve[4] = scm_ulong2num ((unsigned long) stat_temp->st_uid);
 321   ve[5] = scm_ulong2num ((unsigned long) stat_temp->st_gid);
 322 #ifdef HAVE_ST_RDEV
 323   ve[6] = scm_ulong2num ((unsigned long) stat_temp->st_rdev);
 324 #else
 325   ve[6] = SCM_BOOL_F;
 326 #endif
 327   ve[7] = scm_ulong2num ((unsigned long) stat_temp->st_size);
 328   ve[8] = scm_ulong2num ((unsigned long) stat_temp->st_atime);
 329   ve[9] = scm_ulong2num ((unsigned long) stat_temp->st_mtime);
 330   ve[10] = scm_ulong2num ((unsigned long) stat_temp->st_ctime);
 331 #ifdef HAVE_ST_BLKSIZE
 332   ve[11] = scm_ulong2num ((unsigned long) stat_temp->st_blksize);
 333 #else
 334   ve[11] = scm_ulong2num (4096L);
 335 #endif
 336 #ifdef HAVE_ST_BLOCKS
 337   ve[12] = scm_ulong2num ((unsigned long) stat_temp->st_blocks);
 338 #else
 339   ve[12] = SCM_BOOL_F;
 340 #endif
 341   {
 342     int mode = stat_temp->st_mode;
 343
 344     if (S_ISREG (mode))
 345       ve[13] = scm_sym_regular;
 346     else if (S_ISDIR (mode))
 347       ve[13] = scm_sym_directory;
 348 #ifdef HAVE_S_ISLNK
 349     else if (S_ISLNK (mode))
 350       ve[13] = scm_sym_symlink;
 351 #endif
 352     else if (S_ISBLK (mode))
 353       ve[13] = scm_sym_block_special;
 354     else if (S_ISCHR (mode))
 355       ve[13] = scm_sym_char_special;
 356     else if (S_ISFIFO (mode))
 357       ve[13] = scm_sym_fifo;
 358     else if (S_ISSOCK (mode))
 359       ve[13] = scm_sym_sock;
 360     else
 361       ve[13] = scm_sym_unknown;
 362
 363     ve[14] = SCM_MAKINUM ((~S_IFMT) & mode);
 364
 365     /* the layout of the bits in ve[14] is intended to be portable.
 366        If there are systems that don't follow the usual convention,
 367        the following could be used:
 368
 369        tmp = 0;
 370        if (S_ISUID & mode) tmp += 1;
 371        tmp <<= 1;
 372        if (S_IRGRP & mode) tmp += 1;
 373        tmp <<= 1;
 374        if (S_ISVTX & mode) tmp += 1;
 375        tmp <<= 1;
 376        if (S_IRUSR & mode) tmp += 1;
 377        tmp <<= 1;
 378        if (S_IWUSR & mode) tmp += 1;
 379        tmp <<= 1;
 380        if (S_IXUSR & mode) tmp += 1;
 381        tmp <<= 1;
 382        if (S_IWGRP & mode) tmp += 1;
 383        tmp <<= 1;
 384        if (S_IXGRP & mode) tmp += 1;
 385        tmp <<= 1;
 386        if (S_IROTH & mode) tmp += 1;
 387        tmp <<= 1;
 388        if (S_IWOTH & mode) tmp += 1;
 389        tmp <<= 1;
 390        if (S_IXOTH & mode) tmp += 1;
 391
 392        ve[14] = SCM_MAKINUM (tmp);
 393
 394        */
 395   }
 396
 397   return ans;
 398 }
 399
 400 SCM_PROC (s_stat, "stat", 1, 0, 0, scm_stat);
 401
 402 SCM
 403 scm_stat (object)
 404      SCM object;
 405 {
 406   int rv;
 407   int fdes;
 408   struct stat stat_temp;
 409
 410   if (SCM_INUMP (object))
 411     SCM_SYSCALL (rv = fstat (SCM_INUM (object), &stat_temp));
 412   else
 413     {
 414       SCM_ASSERT (SCM_NIMP (object), object, SCM_ARG1, s_stat);
 415       if (SCM_ROSTRINGP (object))
 416         {
 417           SCM_COERCE_SUBSTR (object);
 418           SCM_SYSCALL (rv = stat (SCM_ROCHARS (object), &stat_temp));
 419         }
 420       else
 421         {
 422           object = SCM_COERCE_OUTPORT (object);
 423           SCM_ASSERT (SCM_OPFPORTP (object), object, SCM_ARG1, s_stat);
 424           fdes = SCM_FPORT_FDES (object);
 425           SCM_SYSCALL (rv = fstat (fdes, &stat_temp));
 426         }
 427     }
 428   if (rv == -1)
 429     {
 430       int en = errno;
 431
 432       scm_syserror_msg (s_stat, "%s: %S",
 433                         scm_listify (scm_makfrom0str (strerror (errno)),
 434                                      object,
 435                                      SCM_UNDEFINED),
 436                         en);
 437     }
 438   return scm_stat2scm (&stat_temp);
 439 }
 440
 441 \f
 442 /* {Modifying Directories}
 443  */
 444
 445 SCM_PROC (s_link, "link", 2, 0, 0, scm_link);
 446
 447 SCM
 448 scm_link (oldpath, newpath)
 449      SCM oldpath;
 450      SCM newpath;
 451 {
 452   int val;
 453
 454   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath,
 455               SCM_ARG1, s_link);
 456   if (SCM_SUBSTRP (oldpath))
 457     oldpath = scm_makfromstr (SCM_ROCHARS (oldpath),
 458                               SCM_ROLENGTH (oldpath), 0);
 459   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath,
 460               SCM_ARG2, s_link);
 461   if (SCM_SUBSTRP (newpath))
 462     newpath = scm_makfromstr (SCM_ROCHARS (newpath),
 463                               SCM_ROLENGTH (newpath), 0);
 464   SCM_SYSCALL (val = link (SCM_ROCHARS (oldpath), SCM_ROCHARS (newpath)));
 465   if (val != 0)
 466     scm_syserror (s_link);
 467   return SCM_UNSPECIFIED;
 468 }
 469
 470
 471
 472 SCM_PROC (s_rename, "rename-file", 2, 0, 0, scm_rename);
 473
 474 SCM
 475 scm_rename (oldname, newname)
 476      SCM oldname;
 477      SCM newname;
 478 {
 479   int rv;
 480   SCM_ASSERT (SCM_NIMP (oldname) && SCM_ROSTRINGP (oldname), oldname, SCM_ARG1,
 481               s_rename);
 482   SCM_ASSERT (SCM_NIMP (newname) && SCM_ROSTRINGP (newname), newname, SCM_ARG2,
 483               s_rename);
 484   SCM_COERCE_SUBSTR (oldname);
 485   SCM_COERCE_SUBSTR (newname);
 486 #ifdef HAVE_RENAME
 487   SCM_SYSCALL (rv = rename (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
 488 #else
 489   SCM_SYSCALL (rv = link (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
 490   if (rv == 0)
 491     {
 492       SCM_SYSCALL (rv = unlink (SCM_ROCHARS (oldname)));;
 493       if (rv != 0)
 494         /* unlink failed.  remove new name */
 495         SCM_SYSCALL (unlink (SCM_ROCHARS (newname)));
 496     }
 497 #endif
 498   if (rv != 0)
 499     scm_syserror (s_rename);
 500   return SCM_UNSPECIFIED;
 501 }
 502
 503
 504 SCM_PROC(s_delete_file, "delete-file", 1, 0, 0, scm_delete_file);
 505
 506 SCM
 507 scm_delete_file (str)
 508      SCM str;
 509 {
 510   int ans;
 511   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1,
 512               s_delete_file);
 513   SCM_COERCE_SUBSTR (str);
 514   SCM_SYSCALL (ans = unlink (SCM_ROCHARS (str)));
 515   if (ans != 0)
 516     scm_syserror (s_delete_file);
 517   return SCM_UNSPECIFIED;
 518 }
 519
 520 SCM_PROC (s_mkdir, "mkdir", 1, 1, 0, scm_mkdir);
 521
 522 SCM
 523 scm_mkdir (path, mode)
 524      SCM path;
 525      SCM mode;
 526 {
 527 #ifdef HAVE_MKDIR
 528   int rv;
 529   mode_t mask;
 530   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 531               s_mkdir);
 532   SCM_COERCE_SUBSTR (path);
 533   if (SCM_UNBNDP (mode))
 534     {
 535       mask = umask (0);
 536       umask (mask);
 537       SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), 0777 ^ mask));
 538     }
 539   else
 540     {
 541       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_mkdir);
 542       SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), SCM_INUM (mode)));
 543     }
 544   if (rv != 0)
 545     scm_syserror (s_mkdir);
 546   return SCM_UNSPECIFIED;
 547 #else
 548   scm_sysmissing (s_mkdir);
 549   /* not reached.  */
 550   return SCM_BOOL_F;
 551 #endif
 552 }
 553
 554
 555 SCM_PROC (s_rmdir, "rmdir", 1, 0, 0, scm_rmdir);
 556
 557 SCM
 558 scm_rmdir (path)
 559      SCM path;
 560 {
 561 #ifdef HAVE_RMDIR
 562   int val;
 563
 564   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 565               s_rmdir);
 566   SCM_COERCE_SUBSTR (path);
 567   SCM_SYSCALL (val = rmdir (SCM_ROCHARS (path)));
 568   if (val != 0)
 569     scm_syserror (s_rmdir);
 570   return SCM_UNSPECIFIED;
 571 #else
 572   scm_sysmissing (s_rmdir);
 573   /* not reached.  */
 574   return SCM_BOOL_F;
 575 #endif
 576 }
 577
 578 \f
 579 /* {Examining Directories}
 580  */
 581
 582 long scm_tc16_dir;
 583
 584 SCM_PROC (s_directory_stream_p, "directory-stream?", 1, 0, 0, scm_directory_stream_p);
 585 SCM
 586 scm_directory_stream_p (SCM obj)
 587 {
 588   return SCM_NIMP (obj) && SCM_DIRP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
 589 }
 590
 591 SCM_PROC (s_opendir, "opendir", 1, 0, 0, scm_opendir);
 592
 593 SCM
 594 scm_opendir (dirname)
 595      SCM dirname;
 596 {
 597   DIR *ds;
 598   SCM_ASSERT (SCM_NIMP (dirname) && SCM_ROSTRINGP (dirname), dirname, SCM_ARG1,
 599               s_opendir);
 600   SCM_COERCE_SUBSTR (dirname);
 601   SCM_SYSCALL (ds = opendir (SCM_ROCHARS (dirname)));
 602   if (ds == NULL)
 603     scm_syserror (s_opendir);
 604   SCM_RETURN_NEWSMOB (scm_tc16_dir | SCM_OPN, ds);
 605 }
 606
 607
 608 SCM_PROC (s_readdir, "readdir", 1, 0, 0, scm_readdir);
 609
 610 SCM
 611 scm_readdir (port)
 612      SCM port;
 613 {
 614   struct dirent *rdent;
 615   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_readdir);
 616   errno = 0;
 617   SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port)));
 618   if (errno != 0)
 619     scm_syserror (s_readdir);
 620   return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0)
 621           : SCM_EOF_VAL);
 622 }
 623
 624
 625
 626 SCM_PROC (s_rewinddir, "rewinddir", 1, 0, 0, scm_rewinddir);
 627
 628 SCM
 629 scm_rewinddir (port)
 630      SCM port;
 631 {
 632   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_rewinddir);
 633   rewinddir ((DIR *) SCM_CDR (port));
 634   return SCM_UNSPECIFIED;
 635 }
 636
 637
 638
 639 SCM_PROC (s_closedir, "closedir", 1, 0, 0, scm_closedir);
 640
 641 SCM
 642 scm_closedir (port)
 643      SCM port;
 644 {
 645   int sts;
 646
 647   SCM_ASSERT (SCM_NIMP (port) && SCM_DIRP (port), port, SCM_ARG1, s_closedir);
 648   if (SCM_CLOSEDP (port))
 649     {
 650       return SCM_UNSPECIFIED;
 651     }
 652   SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port)));
 653   if (sts != 0)
 654     scm_syserror (s_closedir);
 655   SCM_SETCAR (port, scm_tc16_dir);
 656   return SCM_UNSPECIFIED;
 657 }
 658
 659
 660
 661
 662 static int scm_dir_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
 663
 664 static int
 665 scm_dir_print (SCM exp, SCM port, scm_print_state *pstate)
 666 {
 667   scm_puts ("#<", port);
 668   if (SCM_CLOSEDP (exp))
 669     scm_puts ("closed: ", port);
 670   scm_puts ("directory stream ", port);
 671   scm_intprint (SCM_CDR (exp), 16, port);
 672   scm_putc ('>', port);
 673   return 1;
 674 }
 675
 676
 677 static scm_sizet scm_dir_free SCM_P ((SCM p));
 678
 679 static scm_sizet
 680 scm_dir_free (p)
 681      SCM p;
 682 {
 683   if (SCM_OPENP (p))
 684     closedir ((DIR *) SCM_CDR (p));
 685   return 0;
 686 }
 687
 688 \f
 689 /* {Navigating Directories}
 690  */
 691
 692
 693 SCM_PROC (s_chdir, "chdir", 1, 0, 0, scm_chdir);
 694
 695 SCM
 696 scm_chdir (str)
 697      SCM str;
 698 {
 699   int ans;
 700
 701   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_chdir);
 702   SCM_COERCE_SUBSTR (str);
 703   SCM_SYSCALL (ans = chdir (SCM_ROCHARS (str)));
 704   if (ans != 0)
 705     scm_syserror (s_chdir);
 706   return SCM_UNSPECIFIED;
 707 }
 708
 709
 710
 711 SCM_PROC (s_getcwd, "getcwd", 0, 0, 0, scm_getcwd);
 712
 713 SCM
 714 scm_getcwd ()
 715 {
 716 #ifdef HAVE_GETCWD
 717   char *rv;
 718
 719   scm_sizet size = 100;
 720   char *wd;
 721   SCM result;
 722
 723   wd = scm_must_malloc (size, s_getcwd);
 724   while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
 725     {
 726       scm_must_free (wd);
 727       size *= 2;
 728       wd = scm_must_malloc (size, s_getcwd);
 729     }
 730   if (rv == 0)
 731     scm_syserror (s_getcwd);
 732   result = scm_makfromstr (wd, strlen (wd), 0);
 733   scm_must_free (wd);
 734   return result;
 735 #else
 736   scm_sysmissing (s_getcwd);
 737   /* not reached.  */
 738   return SCM_BOOL_F;
 739 #endif
 740 }
 741
 742 \f
 743
 744 SCM_PROC (s_select, "select", 3, 2, 0, scm_select);
 745
 746
 747 static int
 748 set_element (SELECT_TYPE *set, SCM element, int arg)
 749 {
 750   int fd;
 751   element = SCM_COERCE_OUTPORT (element);
 752   if (SCM_NIMP (element) && SCM_OPFPORTP (element))
 753     fd = SCM_FPORT_FDES (element);
 754   else {
 755     SCM_ASSERT (SCM_INUMP (element), element, arg, s_select);
 756     fd = SCM_INUM (element);
 757   }
 758   FD_SET (fd, set);
 759   return fd;
 760 }
 761
 762 static int
 763 fill_select_type (SELECT_TYPE *set, SCM list, int arg)
 764 {
 765   int max_fd = 0, fd;
 766   if (SCM_NIMP (list) && SCM_VECTORP (list))
 767     {
 768       int len = SCM_LENGTH (list);
 769       SCM *ve = SCM_VELTS (list);
 770
 771       while (len > 0)
 772         {
 773           fd = set_element (set, ve[len - 1], arg);
 774           if (fd > max_fd)
 775             max_fd = fd;
 776           len--;
 777         }
 778     }
 779   else
 780     {
 781       while (list != SCM_EOL)
 782         {
 783           fd = set_element (set, SCM_CAR (list), arg);
 784           if (fd > max_fd)
 785             max_fd = fd;
 786           list = SCM_CDR (list);
 787         }
 788     }
 789
 790   return max_fd;
 791 }
 792
 793 static SCM
 794 get_element (SELECT_TYPE *set, SCM element, SCM list)
 795 {
 796   element = SCM_COERCE_OUTPORT (element);
 797   if (SCM_NIMP (element) && SCM_OPFPORTP (element))
 798     {
 799       if (FD_ISSET (SCM_FPORT_FDES (element), set))
 800         list = scm_cons (element, list);
 801     }
 802   else if (SCM_INUMP (element))
 803     {
 804       if (FD_ISSET (SCM_INUM (element), set))
 805         list = scm_cons (element, list);
 806     }
 807   return list;
 808 }
 809
 810 static SCM
 811 retrieve_select_type (SELECT_TYPE *set, SCM list)
 812 {
 813   SCM answer_list = SCM_EOL;
 814
 815   if (SCM_NIMP (list) && SCM_VECTORP (list))
 816     {
 817       int len = SCM_LENGTH (list);
 818       SCM *ve = SCM_VELTS (list);
 819
 820       while (len > 0)
 821         {
 822           answer_list = get_element (set, ve[len - 1], answer_list);
 823           len--;
 824         }
 825       return scm_vector (answer_list);
 826     }
 827   else
 828     {
 829       /* list is a list.  */
 830       while (list != SCM_EOL)
 831         {
 832           answer_list = get_element (set, SCM_CAR (list), answer_list);
 833           list = SCM_CDR (list);
 834         }
 835       return answer_list;
 836     }
 837 }
 838
 839
 840 SCM
 841 scm_select (reads, writes, excepts, secs, usecs)
 842      SCM reads;
 843      SCM writes;
 844      SCM excepts;
 845      SCM secs;
 846      SCM usecs;
 847 {
 848 #ifdef HAVE_SELECT
 849   struct timeval timeout;
 850   struct timeval * time_p;
 851   SELECT_TYPE read_set;
 852   SELECT_TYPE write_set;
 853   SELECT_TYPE except_set;
 854   int max_fd, fd;
 855   int sreturn;
 856
 857 #define assert_set(x, arg) \
 858   SCM_ASSERT (scm_ilength (x) > -1 || (SCM_NIMP (x) && SCM_VECTORP (x)), \
 859               x, arg, s_select)
 860   assert_set (reads, SCM_ARG1);
 861   assert_set (writes, SCM_ARG2);
 862   assert_set (excepts, SCM_ARG3);
 863 #undef assert_set
 864
 865   FD_ZERO (&read_set);
 866   FD_ZERO (&write_set);
 867   FD_ZERO (&except_set);
 868
 869   max_fd = fill_select_type (&read_set, reads, SCM_ARG1);
 870   fd = fill_select_type (&write_set, writes, SCM_ARG2);
 871   if (fd > max_fd)
 872     max_fd = fd;
 873   fd = fill_select_type (&except_set, excepts, SCM_ARG3);
 874   if (fd > max_fd)
 875     max_fd = fd;
 876
 877   if (SCM_UNBNDP (secs) || SCM_FALSEP (secs))
 878     time_p = 0;
 879   else
 880     {
 881       if (SCM_INUMP (secs))
 882         {
 883           timeout.tv_sec = SCM_INUM (secs);
 884           if (SCM_UNBNDP (usecs))
 885             timeout.tv_usec = 0;
 886           else
 887             {
 888               SCM_ASSERT (SCM_INUMP (usecs), usecs, SCM_ARG5, s_select);
 889
 890               timeout.tv_usec = SCM_INUM (usecs);
 891             }
 892         }
 893       else
 894         {
 895           double fl = scm_num2dbl (secs, s_select);
 896
 897           if (!SCM_UNBNDP (usecs))
 898             scm_wrong_type_arg (s_select, 4, secs);
 899           if (fl > LONG_MAX)
 900             scm_out_of_range (s_select, secs);
 901           timeout.tv_sec = (long) fl;
 902           timeout.tv_usec = (long) ((fl - timeout.tv_sec) * 1000000);
 903         }
 904       time_p = &timeout;
 905     }
 906
 907 #ifdef GUILE_ISELECT
 908   sreturn = scm_internal_select (max_fd + 1,
 909                                  &read_set, &write_set, &except_set, time_p);
 910 #else
 911   sreturn = select (max_fd + 1,
 912                     &read_set, &write_set, &except_set, time_p);
 913 #endif
 914   if (sreturn < 0)
 915     scm_syserror (s_select);
 916   return scm_listify (retrieve_select_type (&read_set, reads),
 917                       retrieve_select_type (&write_set, writes),
 918                       retrieve_select_type (&except_set, excepts),
 919                       SCM_UNDEFINED);
 920 #else
 921   scm_sysmissing (s_select);
 922   /* not reached.  */
 923   return SCM_BOOL_F;
 924 #endif
 925 }
 926
 927 \f
 928
 929 SCM_PROC (s_fcntl, "fcntl", 2, 0, 1, scm_fcntl);
 930 SCM
 931 scm_fcntl (SCM object, SCM cmd, SCM value)
 932 {
 933   int rv;
 934   int fdes;
 935   int ivalue;
 936
 937   object = SCM_COERCE_OUTPORT (object);
 938
 939   SCM_ASSERT (SCM_INUMP (cmd), cmd, SCM_ARG2, s_fcntl);
 940   if (SCM_NIMP (object) && SCM_OPFPORTP (object))
 941     fdes = SCM_FPORT_FDES (object);
 942   else
 943     {
 944       SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fcntl);
 945       fdes = SCM_INUM (object);
 946     }
 947   if (SCM_NULLP (value))
 948     ivalue = 0;
 949   else
 950     {
 951       SCM_ASSERT (SCM_INUMP (SCM_CAR (value)), value, SCM_ARG3, s_fcntl);
 952       ivalue = SCM_INUM (SCM_CAR (value));
 953     }
 954   SCM_SYSCALL (rv = fcntl (fdes, SCM_INUM (cmd), ivalue));
 955   if (rv == -1)
 956     scm_syserror (s_fcntl);
 957   return SCM_MAKINUM (rv);
 958 }
 959
 960 SCM_PROC (s_fsync, "fsync", 1, 0, 0, scm_fsync);
 961 SCM
 962 scm_fsync (SCM object)
 963 {
 964   int fdes;
 965
 966   object = SCM_COERCE_OUTPORT (object);
 967
 968   if (SCM_NIMP (object) && SCM_OPFPORTP (object))
 969     {
 970       scm_flush (object);
 971       fdes = SCM_FPORT_FDES (object);
 972     }
 973   else
 974     {
 975       SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fsync);
 976       fdes = SCM_INUM (object);
 977     }
 978   if (fsync (fdes) == -1)
 979     scm_syserror (s_fsync);
 980   return SCM_UNSPECIFIED;
 981 }
 982
 983 SCM_PROC (s_symlink, "symlink", 2, 0, 0, scm_symlink);
 984
 985 SCM
 986 scm_symlink(oldpath, newpath)
 987      SCM oldpath;
 988      SCM newpath;
 989 {
 990 #ifdef HAVE_SYMLINK
 991   int val;
 992
 993   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1,
 994               s_symlink);
 995   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2,
 996               s_symlink);
 997   SCM_COERCE_SUBSTR (oldpath);
 998   SCM_COERCE_SUBSTR (newpath);
 999   SCM_SYSCALL (val = symlink(SCM_ROCHARS(oldpath), SCM_ROCHARS(newpath)));
1000   if (val != 0)
1001     scm_syserror (s_symlink);
1002   return SCM_UNSPECIFIED;
1003 #else
1004   scm_sysmissing (s_symlink);
1005   /* not reached.  */
1006   return SCM_BOOL_F;
1007 #endif
1008 }
1009
1010
1011 SCM_PROC (s_readlink, "readlink", 1, 0, 0, scm_readlink);
1012
1013 SCM
1014 scm_readlink(path)
1015   SCM path;
1016 {
1017 #ifdef HAVE_READLINK
1018   int rv;
1019   int size = 100;
1020   char *buf;
1021   SCM result;
1022   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, (char *) SCM_ARG1,
1023               s_readlink);
1024   SCM_COERCE_SUBSTR (path);
1025   buf = scm_must_malloc (size, s_readlink);
1026   while ((rv = readlink (SCM_ROCHARS (path), buf, size)) == size)
1027     {
1028       scm_must_free (buf);
1029       size *= 2;
1030       buf = scm_must_malloc (size, s_readlink);
1031     }
1032   if (rv == -1)
1033     scm_syserror (s_readlink);
1034   result = scm_makfromstr (buf, rv, 0);
1035   scm_must_free (buf);
1036   return result;
1037 #else
1038   scm_sysmissing (s_readlink);
1039   /* not reached.  */
1040   return SCM_BOOL_F;
1041 #endif
1042 }
1043
1044
1045 SCM_PROC (s_lstat, "lstat", 1, 0, 0, scm_lstat);
1046
1047 SCM
1048 scm_lstat(str)
1049   SCM str;
1050 {
1051 #ifdef HAVE_LSTAT
1052   int rv;
1053   struct stat stat_temp;
1054
1055   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, (char *) SCM_ARG1,
1056               s_lstat);
1057   SCM_COERCE_SUBSTR (str);
1058   SCM_SYSCALL(rv = lstat(SCM_ROCHARS(str), &stat_temp));
1059   if (rv != 0)
1060     {
1061       int en = errno;
1062
1063       scm_syserror_msg (s_lstat, "%s: %S",
1064                         scm_listify (scm_makfrom0str (strerror (errno)),
1065                                      str,
1066                                      SCM_UNDEFINED),
1067                         en);
1068     }
1069   return scm_stat2scm(&stat_temp);
1070 #else
1071   scm_sysmissing (s_lstat);
1072   /* not reached.  */
1073   return SCM_BOOL_F;
1074 #endif
1075 }
1076
1077
1078 SCM_PROC (s_copy_file, "copy-file", 2, 0, 0, scm_copy_file);
1079
1080 SCM
1081 scm_copy_file (oldfile, newfile)
1082      SCM oldfile;
1083      SCM newfile;
1084 {
1085   int oldfd, newfd;
1086   int n;
1087   char buf[BUFSIZ];
1088   struct stat oldstat;
1089
1090   SCM_ASSERT (SCM_NIMP (oldfile) && SCM_ROSTRINGP (oldfile), oldfile, SCM_ARG1, s_copy_file);
1091   if (SCM_SUBSTRP (oldfile))
1092     oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0);
1093   SCM_ASSERT (SCM_NIMP (newfile) && SCM_ROSTRINGP (newfile), newfile, SCM_ARG2, s_copy_file);
1094   if (SCM_SUBSTRP (newfile))
1095     newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0);
1096   if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1)
1097     scm_syserror (s_copy_file);
1098   oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY);
1099   if (oldfd == -1)
1100     scm_syserror (s_copy_file);
1101
1102   /* use POSIX flags instead of 07777?.  */
1103   newfd = open (SCM_ROCHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
1104                 oldstat.st_mode & 07777);
1105   if (newfd == -1)
1106     scm_syserror (s_copy_file);
1107
1108   while ((n = read (oldfd, buf, sizeof buf)) > 0)
1109     if (write (newfd, buf, n) != n)
1110       {
1111         close (oldfd);
1112         close (newfd);
1113         scm_syserror (s_copy_file);
1114       }
1115   close (oldfd);
1116   if (close (newfd) == -1)
1117     scm_syserror (s_copy_file);
1118   return SCM_UNSPECIFIED;
1119 }
1120
1121 \f
1122 /* Filename manipulation */
1123
1124 SCM scm_dot_string;
1125
1126 SCM_PROC (s_dirname, "dirname", 1, 0, 0, scm_dirname);
1127
1128 SCM
1129 scm_dirname (SCM filename)
1130 {
1131   char *s;
1132   int i, len;
1133   SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
1134               filename,
1135               SCM_ARG1,
1136               s_dirname);
1137   s = SCM_ROCHARS (filename);
1138   len = SCM_LENGTH (filename);
1139   i = len - 1;
1140   while (i >= 0 && s[i] == '/') --i;
1141   while (i >= 0 && s[i] != '/') --i;
1142   while (i >= 0 && s[i] == '/') --i;
1143   if (i < 0)
1144     {
1145       if (len > 0 && s[0] == '/')
1146         return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
1147       else
1148         return scm_dot_string;
1149     }
1150   else
1151     return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (i + 1));
1152 }
1153
1154 SCM_PROC (s_basename, "basename", 1, 1, 0, scm_basename);
1155
1156 SCM
1157 scm_basename (SCM filename, SCM suffix)
1158 {
1159   char *f, *s = 0;
1160   int i, j, len, end;
1161   SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
1162               filename,
1163               SCM_ARG1,
1164               s_basename);
1165   SCM_ASSERT (SCM_UNBNDP (suffix)
1166               || (SCM_NIMP (suffix) && SCM_ROSTRINGP (suffix)),
1167               suffix,
1168               SCM_ARG2,
1169               s_basename);
1170   f = SCM_ROCHARS (filename);
1171   if (SCM_UNBNDP (suffix))
1172     j = -1;
1173   else
1174     {
1175       s = SCM_ROCHARS (suffix);
1176       j = SCM_LENGTH (suffix) - 1;
1177     }
1178   len = SCM_LENGTH (filename);
1179   i = len - 1;
1180   while (i >= 0 && f[i] == '/') --i;
1181   end = i;
1182   while (i >= 0 && j >= 0 && f[i] == s[j]) --i, --j;
1183   if (j == -1)
1184     end = i;
1185   while (i >= 0 && f[i] != '/') --i;
1186   if (i == end)
1187     {
1188       if (len > 0 && f[0] == '/')
1189         return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
1190       else
1191         return scm_dot_string;
1192     }
1193   else
1194     return scm_make_shared_substring (filename,
1195                                       SCM_MAKINUM (i + 1),
1196                                       SCM_MAKINUM (end + 1));
1197 }
1198
1199
1200
1201 \f
1202
1203 void
1204 scm_init_filesys ()
1205 {
1206   scm_tc16_dir = scm_make_smob_type_mfpe ("directory", 0,
1207                                          NULL, scm_dir_free,scm_dir_print, NULL);
1208
1209   scm_dot_string = scm_permanent_object (scm_makfrom0str ("."));
1210
1211 #ifdef O_RDONLY
1212 scm_sysintern ("O_RDONLY", scm_long2num (O_RDONLY));
1213 #endif
1214 #ifdef O_WRONLY
1215 scm_sysintern ("O_WRONLY", scm_long2num (O_WRONLY));
1216 #endif
1217 #ifdef O_RDWR
1218 scm_sysintern ("O_RDWR", scm_long2num (O_RDWR));
1219 #endif
1220 #ifdef O_CREAT
1221 scm_sysintern ("O_CREAT", scm_long2num (O_CREAT));
1222 #endif
1223 #ifdef O_EXCL
1224 scm_sysintern ("O_EXCL", scm_long2num (O_EXCL));
1225 #endif
1226 #ifdef O_NOCTTY
1227 scm_sysintern ("O_NOCTTY", scm_long2num (O_NOCTTY));
1228 #endif
1229 #ifdef O_TRUNC
1230 scm_sysintern ("O_TRUNC", scm_long2num (O_TRUNC));
1231 #endif
1232 #ifdef O_APPEND
1233 scm_sysintern ("O_APPEND", scm_long2num (O_APPEND));
1234 #endif
1235 #ifdef O_NONBLOCK
1236 scm_sysintern ("O_NONBLOCK", scm_long2num (O_NONBLOCK));
1237 #endif
1238 #ifdef O_NDELAY
1239 scm_sysintern ("O_NDELAY", scm_long2num (O_NDELAY));
1240 #endif
1241 #ifdef O_SYNC
1242 scm_sysintern ("O_SYNC", scm_long2num (O_SYNC));
1243 #endif
1244
1245 #ifdef F_DUPFD
1246 scm_sysintern ("F_DUPFD", scm_long2num (F_DUPFD));
1247 #endif
1248 #ifdef F_GETFD
1249 scm_sysintern ("F_GETFD", scm_long2num (F_GETFD));
1250 #endif
1251 #ifdef F_SETFD
1252 scm_sysintern ("F_SETFD", scm_long2num (F_SETFD));
1253 #endif
1254 #ifdef F_GETFL
1255 scm_sysintern ("F_GETFL", scm_long2num (F_GETFL));
1256 #endif
1257 #ifdef F_SETFL
1258 scm_sysintern ("F_SETFL", scm_long2num (F_SETFL));
1259 #endif
1260 #ifdef F_GETOWN
1261 scm_sysintern ("F_GETOWN", scm_long2num (F_GETOWN));
1262 #endif
1263 #ifdef F_SETOWN
1264 scm_sysintern ("F_SETOWN", scm_long2num (F_SETOWN));
1265 #endif
1266 #ifdef FD_CLOEXEC
1267 scm_sysintern ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC));
1268 #endif
1269
1270 #include "filesys.x"
1271 }