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 SCM_SYMBOL (scm_sym_symlink, "symlink");
 299 SCM_SYMBOL (scm_sym_block_special, "block-special");
 300 SCM_SYMBOL (scm_sym_char_special, "char-special");
 301 SCM_SYMBOL (scm_sym_fifo, "fifo");
 302 SCM_SYMBOL (scm_sym_sock, "socket");
 303 SCM_SYMBOL (scm_sym_unknown, "unknown");
 304
 305 static SCM scm_stat2scm SCM_P ((struct stat *stat_temp));
 306
 307 static SCM
 308 scm_stat2scm (stat_temp)
 309      struct stat *stat_temp;
 310 {
 311   SCM ans = scm_make_vector (SCM_MAKINUM (15), SCM_UNSPECIFIED);
 312   SCM *ve = SCM_VELTS (ans);
 313
 314   ve[0] = scm_ulong2num ((unsigned long) stat_temp->st_dev);
 315   ve[1] = scm_ulong2num ((unsigned long) stat_temp->st_ino);
 316   ve[2] = scm_ulong2num ((unsigned long) stat_temp->st_mode);
 317   ve[3] = scm_ulong2num ((unsigned long) stat_temp->st_nlink);
 318   ve[4] = scm_ulong2num ((unsigned long) stat_temp->st_uid);
 319   ve[5] = scm_ulong2num ((unsigned long) stat_temp->st_gid);
 320 #ifdef HAVE_ST_RDEV
 321   ve[6] = scm_ulong2num ((unsigned long) stat_temp->st_rdev);
 322 #else
 323   ve[6] = SCM_BOOL_F;
 324 #endif
 325   ve[7] = scm_ulong2num ((unsigned long) stat_temp->st_size);
 326   ve[8] = scm_ulong2num ((unsigned long) stat_temp->st_atime);
 327   ve[9] = scm_ulong2num ((unsigned long) stat_temp->st_mtime);
 328   ve[10] = scm_ulong2num ((unsigned long) stat_temp->st_ctime);
 329 #ifdef HAVE_ST_BLKSIZE
 330   ve[11] = scm_ulong2num ((unsigned long) stat_temp->st_blksize);
 331 #else
 332   ve[11] = scm_ulong2num (4096L);
 333 #endif
 334 #ifdef HAVE_ST_BLOCKS
 335   ve[12] = scm_ulong2num ((unsigned long) stat_temp->st_blocks);
 336 #else
 337   ve[12] = SCM_BOOL_F;
 338 #endif
 339   {
 340     int mode = stat_temp->st_mode;
 341
 342     if (S_ISREG (mode))
 343       ve[13] = scm_sym_regular;
 344     else if (S_ISDIR (mode))
 345       ve[13] = scm_sym_directory;
 346     else if (S_ISLNK (mode))
 347       ve[13] = scm_sym_symlink;
 348     else if (S_ISBLK (mode))
 349       ve[13] = scm_sym_block_special;
 350     else if (S_ISCHR (mode))
 351       ve[13] = scm_sym_char_special;
 352     else if (S_ISFIFO (mode))
 353       ve[13] = scm_sym_fifo;
 354     else if (S_ISSOCK (mode))
 355       ve[13] = scm_sym_sock;
 356     else
 357       ve[13] = scm_sym_unknown;
 358
 359     ve[14] = SCM_MAKINUM ((~S_IFMT) & mode);
 360
 361     /* the layout of the bits in ve[14] is intended to be portable.
 362        If there are systems that don't follow the usual convention,
 363        the following could be used:
 364
 365        tmp = 0;
 366        if (S_ISUID & mode) tmp += 1;
 367        tmp <<= 1;
 368        if (S_IRGRP & mode) tmp += 1;
 369        tmp <<= 1;
 370        if (S_ISVTX & mode) tmp += 1;
 371        tmp <<= 1;
 372        if (S_IRUSR & mode) tmp += 1;
 373        tmp <<= 1;
 374        if (S_IWUSR & mode) tmp += 1;
 375        tmp <<= 1;
 376        if (S_IXUSR & mode) tmp += 1;
 377        tmp <<= 1;
 378        if (S_IWGRP & mode) tmp += 1;
 379        tmp <<= 1;
 380        if (S_IXGRP & mode) tmp += 1;
 381        tmp <<= 1;
 382        if (S_IROTH & mode) tmp += 1;
 383        tmp <<= 1;
 384        if (S_IWOTH & mode) tmp += 1;
 385        tmp <<= 1;
 386        if (S_IXOTH & mode) tmp += 1;
 387
 388        ve[14] = SCM_MAKINUM (tmp);
 389
 390        */
 391   }
 392
 393   return ans;
 394 }
 395
 396 SCM_PROC (s_stat, "stat", 1, 0, 0, scm_stat);
 397
 398 SCM
 399 scm_stat (object)
 400      SCM object;
 401 {
 402   int rv;
 403   int fdes;
 404   struct stat stat_temp;
 405
 406   if (SCM_INUMP (object))
 407     SCM_SYSCALL (rv = fstat (SCM_INUM (object), &stat_temp));
 408   else
 409     {
 410       SCM_ASSERT (SCM_NIMP (object), object, SCM_ARG1, s_stat);
 411       if (SCM_ROSTRINGP (object))
 412         {
 413           SCM_COERCE_SUBSTR (object);
 414           SCM_SYSCALL (rv = stat (SCM_ROCHARS (object), &stat_temp));
 415         }
 416       else
 417         {
 418           object = SCM_COERCE_OUTPORT (object);
 419           SCM_ASSERT (SCM_OPFPORTP (object), object, SCM_ARG1, s_stat);
 420           fdes = SCM_FPORT_FDES (object);
 421           SCM_SYSCALL (rv = fstat (fdes, &stat_temp));
 422         }
 423     }
 424   if (rv == -1)
 425     {
 426       int en = errno;
 427
 428       scm_syserror_msg (s_stat, "%s: %S",
 429                         scm_listify (scm_makfrom0str (strerror (errno)),
 430                                      object,
 431                                      SCM_UNDEFINED),
 432                         en);
 433     }
 434   return scm_stat2scm (&stat_temp);
 435 }
 436
 437 \f
 438 /* {Modifying Directories}
 439  */
 440
 441 SCM_PROC (s_link, "link", 2, 0, 0, scm_link);
 442
 443 SCM
 444 scm_link (oldpath, newpath)
 445      SCM oldpath;
 446      SCM newpath;
 447 {
 448   int val;
 449
 450   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath,
 451               SCM_ARG1, s_link);
 452   if (SCM_SUBSTRP (oldpath))
 453     oldpath = scm_makfromstr (SCM_ROCHARS (oldpath),
 454                               SCM_ROLENGTH (oldpath), 0);
 455   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath,
 456               SCM_ARG2, s_link);
 457   if (SCM_SUBSTRP (newpath))
 458     newpath = scm_makfromstr (SCM_ROCHARS (newpath),
 459                               SCM_ROLENGTH (newpath), 0);
 460   SCM_SYSCALL (val = link (SCM_ROCHARS (oldpath), SCM_ROCHARS (newpath)));
 461   if (val != 0)
 462     scm_syserror (s_link);
 463   return SCM_UNSPECIFIED;
 464 }
 465
 466
 467
 468 SCM_PROC (s_rename, "rename-file", 2, 0, 0, scm_rename);
 469
 470 SCM
 471 scm_rename (oldname, newname)
 472      SCM oldname;
 473      SCM newname;
 474 {
 475   int rv;
 476   SCM_ASSERT (SCM_NIMP (oldname) && SCM_ROSTRINGP (oldname), oldname, SCM_ARG1,
 477               s_rename);
 478   SCM_ASSERT (SCM_NIMP (newname) && SCM_ROSTRINGP (newname), newname, SCM_ARG2,
 479               s_rename);
 480   SCM_COERCE_SUBSTR (oldname);
 481   SCM_COERCE_SUBSTR (newname);
 482 #ifdef HAVE_RENAME
 483   SCM_SYSCALL (rv = rename (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
 484 #else
 485   SCM_SYSCALL (rv = link (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
 486   if (rv == 0)
 487     {
 488       SCM_SYSCALL (rv = unlink (SCM_ROCHARS (oldname)));;
 489       if (rv != 0)
 490         /* unlink failed.  remove new name */
 491         SCM_SYSCALL (unlink (SCM_ROCHARS (newname)));
 492     }
 493 #endif
 494   if (rv != 0)
 495     scm_syserror (s_rename);
 496   return SCM_UNSPECIFIED;
 497 }
 498
 499
 500 SCM_PROC(s_delete_file, "delete-file", 1, 0, 0, scm_delete_file);
 501
 502 SCM
 503 scm_delete_file (str)
 504      SCM str;
 505 {
 506   int ans;
 507   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1,
 508               s_delete_file);
 509   SCM_COERCE_SUBSTR (str);
 510   SCM_SYSCALL (ans = unlink (SCM_ROCHARS (str)));
 511   if (ans != 0)
 512     scm_syserror (s_delete_file);
 513   return SCM_UNSPECIFIED;
 514 }
 515
 516 SCM_PROC (s_mkdir, "mkdir", 1, 1, 0, scm_mkdir);
 517
 518 SCM
 519 scm_mkdir (path, mode)
 520      SCM path;
 521      SCM mode;
 522 {
 523 #ifdef HAVE_MKDIR
 524   int rv;
 525   mode_t mask;
 526   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 527               s_mkdir);
 528   SCM_COERCE_SUBSTR (path);
 529   if (SCM_UNBNDP (mode))
 530     {
 531       mask = umask (0);
 532       umask (mask);
 533       SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), 0777 ^ mask));
 534     }
 535   else
 536     {
 537       SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_mkdir);
 538       SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), SCM_INUM (mode)));
 539     }
 540   if (rv != 0)
 541     scm_syserror (s_mkdir);
 542   return SCM_UNSPECIFIED;
 543 #else
 544   scm_sysmissing (s_mkdir);
 545   /* not reached.  */
 546   return SCM_BOOL_F;
 547 #endif
 548 }
 549
 550
 551 SCM_PROC (s_rmdir, "rmdir", 1, 0, 0, scm_rmdir);
 552
 553 SCM
 554 scm_rmdir (path)
 555      SCM path;
 556 {
 557 #ifdef HAVE_RMDIR
 558   int val;
 559
 560   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
 561               s_rmdir);
 562   SCM_COERCE_SUBSTR (path);
 563   SCM_SYSCALL (val = rmdir (SCM_ROCHARS (path)));
 564   if (val != 0)
 565     scm_syserror (s_rmdir);
 566   return SCM_UNSPECIFIED;
 567 #else
 568   scm_sysmissing (s_rmdir);
 569   /* not reached.  */
 570   return SCM_BOOL_F;
 571 #endif
 572 }
 573
 574 \f
 575 /* {Examining Directories}
 576  */
 577
 578 long scm_tc16_dir;
 579
 580 SCM_PROC (s_opendir, "opendir", 1, 0, 0, scm_opendir);
 581
 582 SCM
 583 scm_opendir (dirname)
 584      SCM dirname;
 585 {
 586   DIR *ds;
 587   SCM_ASSERT (SCM_NIMP (dirname) && SCM_ROSTRINGP (dirname), dirname, SCM_ARG1,
 588               s_opendir);
 589   SCM_COERCE_SUBSTR (dirname);
 590   SCM_SYSCALL (ds = opendir (SCM_ROCHARS (dirname)));
 591   if (ds == NULL)
 592     scm_syserror (s_opendir);
 593   SCM_RETURN_NEWSMOB (scm_tc16_dir | SCM_OPN, ds);
 594 }
 595
 596
 597 SCM_PROC (s_readdir, "readdir", 1, 0, 0, scm_readdir);
 598
 599 SCM
 600 scm_readdir (port)
 601      SCM port;
 602 {
 603   struct dirent *rdent;
 604   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_readdir);
 605   errno = 0;
 606   SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port)));
 607   if (errno != 0)
 608     scm_syserror (s_readdir);
 609   return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0)
 610           : SCM_EOF_VAL);
 611 }
 612
 613
 614
 615 SCM_PROC (s_rewinddir, "rewinddir", 1, 0, 0, scm_rewinddir);
 616
 617 SCM
 618 scm_rewinddir (port)
 619      SCM port;
 620 {
 621   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_rewinddir);
 622   rewinddir ((DIR *) SCM_CDR (port));
 623   return SCM_UNSPECIFIED;
 624 }
 625
 626
 627
 628 SCM_PROC (s_closedir, "closedir", 1, 0, 0, scm_closedir);
 629
 630 SCM
 631 scm_closedir (port)
 632      SCM port;
 633 {
 634   int sts;
 635
 636   SCM_ASSERT (SCM_NIMP (port) && SCM_DIRP (port), port, SCM_ARG1, s_closedir);
 637   if (SCM_CLOSEDP (port))
 638     {
 639       return SCM_UNSPECIFIED;
 640     }
 641   SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port)));
 642   if (sts != 0)
 643     scm_syserror (s_closedir);
 644   SCM_SETCAR (port, scm_tc16_dir);
 645   return SCM_UNSPECIFIED;
 646 }
 647
 648
 649
 650
 651 static int scm_dir_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
 652
 653 static int
 654 scm_dir_print (SCM exp, SCM port, scm_print_state *pstate)
 655 {
 656   scm_puts ("#<", port);
 657   if (SCM_CLOSEDP (exp))
 658     scm_puts ("closed: ", port);
 659   scm_puts ("directory ", port);
 660   scm_intprint (SCM_CDR (exp), 16, port);
 661   scm_putc ('>', port);
 662   return 1;
 663 }
 664
 665
 666 static scm_sizet scm_dir_free SCM_P ((SCM p));
 667
 668 static scm_sizet
 669 scm_dir_free (p)
 670      SCM p;
 671 {
 672   if (SCM_OPENP (p))
 673     closedir ((DIR *) SCM_CDR (p));
 674   return 0;
 675 }
 676
 677 \f
 678 /* {Navigating Directories}
 679  */
 680
 681
 682 SCM_PROC (s_chdir, "chdir", 1, 0, 0, scm_chdir);
 683
 684 SCM
 685 scm_chdir (str)
 686      SCM str;
 687 {
 688   int ans;
 689
 690   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_chdir);
 691   SCM_COERCE_SUBSTR (str);
 692   SCM_SYSCALL (ans = chdir (SCM_ROCHARS (str)));
 693   if (ans != 0)
 694     scm_syserror (s_chdir);
 695   return SCM_UNSPECIFIED;
 696 }
 697
 698
 699
 700 SCM_PROC (s_getcwd, "getcwd", 0, 0, 0, scm_getcwd);
 701
 702 SCM
 703 scm_getcwd ()
 704 {
 705 #ifdef HAVE_GETCWD
 706   char *rv;
 707
 708   scm_sizet size = 100;
 709   char *wd;
 710   SCM result;
 711
 712   wd = scm_must_malloc (size, s_getcwd);
 713   while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
 714     {
 715       scm_must_free (wd);
 716       size *= 2;
 717       wd = scm_must_malloc (size, s_getcwd);
 718     }
 719   if (rv == 0)
 720     scm_syserror (s_getcwd);
 721   result = scm_makfromstr (wd, strlen (wd), 0);
 722   scm_must_free (wd);
 723   return result;
 724 #else
 725   scm_sysmissing (s_getcwd);
 726   /* not reached.  */
 727   return SCM_BOOL_F;
 728 #endif
 729 }
 730
 731 \f
 732
 733 SCM_PROC (s_select, "select", 3, 2, 0, scm_select);
 734
 735
 736 static int
 737 set_element (SELECT_TYPE *set, SCM element, int arg)
 738 {
 739   int fd;
 740   element = SCM_COERCE_OUTPORT (element);
 741   if (SCM_NIMP (element) && SCM_OPFPORTP (element))
 742     fd = SCM_FPORT_FDES (element);
 743   else {
 744     SCM_ASSERT (SCM_INUMP (element), element, arg, s_select);
 745     fd = SCM_INUM (element);
 746   }
 747   FD_SET (fd, set);
 748   return fd;
 749 }
 750
 751 static int
 752 fill_select_type (SELECT_TYPE *set, SCM list, int arg)
 753 {
 754   int max_fd = 0, fd;
 755   if (SCM_NIMP (list) && SCM_VECTORP (list))
 756     {
 757       int len = SCM_LENGTH (list);
 758       SCM *ve = SCM_VELTS (list);
 759
 760       while (len > 0)
 761         {
 762           fd = set_element (set, ve[len - 1], arg);
 763           if (fd > max_fd)
 764             max_fd = fd;
 765           len--;
 766         }
 767     }
 768   else
 769     {
 770       while (list != SCM_EOL)
 771         {
 772           fd = set_element (set, SCM_CAR (list), arg);
 773           if (fd > max_fd)
 774             max_fd = fd;
 775           list = SCM_CDR (list);
 776         }
 777     }
 778
 779   return max_fd;
 780 }
 781
 782 static SCM
 783 get_element (SELECT_TYPE *set, SCM element, SCM list)
 784 {
 785   element = SCM_COERCE_OUTPORT (element);
 786   if (SCM_NIMP (element) && SCM_OPFPORTP (element))
 787     {
 788       if (FD_ISSET (SCM_FPORT_FDES (element), set))
 789         list = scm_cons (element, list);
 790     }
 791   else if (SCM_INUMP (element))
 792     {
 793       if (FD_ISSET (SCM_INUM (element), set))
 794         list = scm_cons (element, list);
 795     }
 796   return list;
 797 }
 798
 799 static SCM
 800 retrieve_select_type (SELECT_TYPE *set, SCM list)
 801 {
 802   SCM answer_list = SCM_EOL;
 803
 804   if (SCM_NIMP (list) && SCM_VECTORP (list))
 805     {
 806       int len = SCM_LENGTH (list);
 807       SCM *ve = SCM_VELTS (list);
 808
 809       while (len > 0)
 810         {
 811           answer_list = get_element (set, ve[len - 1], answer_list);
 812           len--;
 813         }
 814       return scm_vector (answer_list);
 815     }
 816   else
 817     {
 818       /* list is a list.  */
 819       while (list != SCM_EOL)
 820         {
 821           answer_list = get_element (set, SCM_CAR (list), answer_list);
 822           list = SCM_CDR (list);
 823         }
 824       return answer_list;
 825     }
 826 }
 827
 828
 829 SCM
 830 scm_select (reads, writes, excepts, secs, usecs)
 831      SCM reads;
 832      SCM writes;
 833      SCM excepts;
 834      SCM secs;
 835      SCM usecs;
 836 {
 837 #ifdef HAVE_SELECT
 838   struct timeval timeout;
 839   struct timeval * time_p;
 840   SELECT_TYPE read_set;
 841   SELECT_TYPE write_set;
 842   SELECT_TYPE except_set;
 843   int max_fd, fd;
 844   int sreturn;
 845
 846 #define assert_set(x, arg) \
 847   SCM_ASSERT (scm_ilength (x) > -1 || (SCM_NIMP (x) && SCM_VECTORP (x)), \
 848               x, arg, s_select)
 849   assert_set (reads, SCM_ARG1);
 850   assert_set (writes, SCM_ARG2);
 851   assert_set (excepts, SCM_ARG3);
 852 #undef assert_set
 853
 854   FD_ZERO (&read_set);
 855   FD_ZERO (&write_set);
 856   FD_ZERO (&except_set);
 857
 858   max_fd = fill_select_type (&read_set, reads, SCM_ARG1);
 859   fd = fill_select_type (&write_set, writes, SCM_ARG2);
 860   if (fd > max_fd)
 861     max_fd = fd;
 862   fd = fill_select_type (&except_set, excepts, SCM_ARG3);
 863   if (fd > max_fd)
 864     max_fd = fd;
 865
 866   if (SCM_UNBNDP (secs) || SCM_FALSEP (secs))
 867     time_p = 0;
 868   else
 869     {
 870       if (SCM_INUMP (secs))
 871         {
 872           timeout.tv_sec = SCM_INUM (secs);
 873           if (SCM_UNBNDP (usecs))
 874             timeout.tv_usec = 0;
 875           else
 876             {
 877               SCM_ASSERT (SCM_INUMP (usecs), usecs, SCM_ARG5, s_select);
 878
 879               timeout.tv_usec = SCM_INUM (usecs);
 880             }
 881         }
 882       else
 883         {
 884           double fl = scm_num2dbl (secs, s_select);
 885
 886           if (!SCM_UNBNDP (usecs))
 887             scm_wrong_type_arg (s_select, 4, secs);
 888           if (fl > LONG_MAX)
 889             scm_out_of_range (s_select, secs);
 890           timeout.tv_sec = (long) fl;
 891           timeout.tv_usec = (long) ((fl - timeout.tv_sec) * 1000000);
 892         }
 893       time_p = &timeout;
 894     }
 895
 896 #ifdef GUILE_ISELECT
 897   sreturn = scm_internal_select (max_fd + 1,
 898                                  &read_set, &write_set, &except_set, time_p);
 899 #else
 900   sreturn = select (max_fd + 1,
 901                     &read_set, &write_set, &except_set, time_p);
 902 #endif
 903   if (sreturn < 0)
 904     scm_syserror (s_select);
 905   return scm_listify (retrieve_select_type (&read_set, reads),
 906                       retrieve_select_type (&write_set, writes),
 907                       retrieve_select_type (&except_set, excepts),
 908                       SCM_UNDEFINED);
 909 #else
 910   scm_sysmissing (s_select);
 911   /* not reached.  */
 912   return SCM_BOOL_F;
 913 #endif
 914 }
 915
 916 \f
 917
 918 SCM_PROC (s_fcntl, "fcntl", 2, 0, 1, scm_fcntl);
 919 SCM
 920 scm_fcntl (SCM object, SCM cmd, SCM value)
 921 {
 922   int rv;
 923   int fdes;
 924   int ivalue;
 925
 926   object = SCM_COERCE_OUTPORT (object);
 927
 928   SCM_ASSERT (SCM_INUMP (cmd), cmd, SCM_ARG2, s_fcntl);
 929   if (SCM_NIMP (object) && SCM_OPFPORTP (object))
 930     fdes = SCM_FPORT_FDES (object);
 931   else
 932     {
 933       SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fcntl);
 934       fdes = SCM_INUM (object);
 935     }
 936   if (SCM_NULLP (value))
 937     ivalue = 0;
 938   else
 939     {
 940       SCM_ASSERT (SCM_INUMP (SCM_CAR (value)), value, SCM_ARG3, s_fcntl);
 941       ivalue = SCM_INUM (SCM_CAR (value));
 942     }
 943   SCM_SYSCALL (rv = fcntl (fdes, SCM_INUM (cmd), ivalue));
 944   if (rv == -1)
 945     scm_syserror (s_fcntl);
 946   return SCM_MAKINUM (rv);
 947 }
 948
 949 SCM_PROC (s_fsync, "fsync", 1, 0, 0, scm_fsync);
 950 SCM
 951 scm_fsync (SCM object)
 952 {
 953   int fdes;
 954
 955   object = SCM_COERCE_OUTPORT (object);
 956
 957   if (SCM_NIMP (object) && SCM_OPFPORTP (object))
 958     {
 959       scm_flush (object);
 960       fdes = SCM_FPORT_FDES (object);
 961     }
 962   else
 963     {
 964       SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fsync);
 965       fdes = SCM_INUM (object);
 966     }
 967   if (fsync (fdes) == -1)
 968     scm_syserror (s_fsync);
 969   return SCM_UNSPECIFIED;
 970 }
 971
 972 SCM_PROC (s_symlink, "symlink", 2, 0, 0, scm_symlink);
 973
 974 SCM
 975 scm_symlink(oldpath, newpath)
 976      SCM oldpath;
 977      SCM newpath;
 978 {
 979 #ifdef HAVE_SYMLINK
 980   int val;
 981
 982   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1,
 983               s_symlink);
 984   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2,
 985               s_symlink);
 986   SCM_COERCE_SUBSTR (oldpath);
 987   SCM_COERCE_SUBSTR (newpath);
 988   SCM_SYSCALL (val = symlink(SCM_ROCHARS(oldpath), SCM_ROCHARS(newpath)));
 989   if (val != 0)
 990     scm_syserror (s_symlink);
 991   return SCM_UNSPECIFIED;
 992 #else
 993   scm_sysmissing (s_symlink);
 994   /* not reached.  */
 995   return SCM_BOOL_F;
 996 #endif
 997 }
 998
 999
1000 SCM_PROC (s_readlink, "readlink", 1, 0, 0, scm_readlink);
1001
1002 SCM
1003 scm_readlink(path)
1004   SCM path;
1005 {
1006 #ifdef HAVE_READLINK
1007   int rv;
1008   int size = 100;
1009   char *buf;
1010   SCM result;
1011   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, (char *) SCM_ARG1,
1012               s_readlink);
1013   SCM_COERCE_SUBSTR (path);
1014   buf = scm_must_malloc (size, s_readlink);
1015   while ((rv = readlink (SCM_ROCHARS (path), buf, size)) == size)
1016     {
1017       scm_must_free (buf);
1018       size *= 2;
1019       buf = scm_must_malloc (size, s_readlink);
1020     }
1021   if (rv == -1)
1022     scm_syserror (s_readlink);
1023   result = scm_makfromstr (buf, rv, 0);
1024   scm_must_free (buf);
1025   return result;
1026 #else
1027   scm_sysmissing (s_readlink);
1028   /* not reached.  */
1029   return SCM_BOOL_F;
1030 #endif
1031 }
1032
1033
1034 SCM_PROC (s_lstat, "lstat", 1, 0, 0, scm_lstat);
1035
1036 SCM
1037 scm_lstat(str)
1038   SCM str;
1039 {
1040 #ifdef HAVE_LSTAT
1041   int rv;
1042   struct stat stat_temp;
1043
1044   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, (char *) SCM_ARG1,
1045               s_lstat);
1046   SCM_COERCE_SUBSTR (str);
1047   SCM_SYSCALL(rv = lstat(SCM_ROCHARS(str), &stat_temp));
1048   if (rv != 0)
1049     {
1050       int en = errno;
1051
1052       scm_syserror_msg (s_lstat, "%s: %S",
1053                         scm_listify (scm_makfrom0str (strerror (errno)),
1054                                      str,
1055                                      SCM_UNDEFINED),
1056                         en);
1057     }
1058   return scm_stat2scm(&stat_temp);
1059 #else
1060   scm_sysmissing (s_lstat);
1061   /* not reached.  */
1062   return SCM_BOOL_F;
1063 #endif
1064 }
1065
1066
1067 SCM_PROC (s_copy_file, "copy-file", 2, 0, 0, scm_copy_file);
1068
1069 SCM
1070 scm_copy_file (oldfile, newfile)
1071      SCM oldfile;
1072      SCM newfile;
1073 {
1074   int oldfd, newfd;
1075   int n;
1076   char buf[BUFSIZ];
1077   struct stat oldstat;
1078
1079   SCM_ASSERT (SCM_NIMP (oldfile) && SCM_ROSTRINGP (oldfile), oldfile, SCM_ARG1, s_copy_file);
1080   if (SCM_SUBSTRP (oldfile))
1081     oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0);
1082   SCM_ASSERT (SCM_NIMP (newfile) && SCM_ROSTRINGP (newfile), newfile, SCM_ARG2, s_copy_file);
1083   if (SCM_SUBSTRP (newfile))
1084     newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0);
1085   if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1)
1086     scm_syserror (s_copy_file);
1087   oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY);
1088   if (oldfd == -1)
1089     scm_syserror (s_copy_file);
1090
1091   /* use POSIX flags instead of 07777?.  */
1092   newfd = open (SCM_ROCHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
1093                 oldstat.st_mode & 07777);
1094   if (newfd == -1)
1095     scm_syserror (s_copy_file);
1096
1097   while ((n = read (oldfd, buf, sizeof buf)) > 0)
1098     if (write (newfd, buf, n) != n)
1099       {
1100         close (oldfd);
1101         close (newfd);
1102         scm_syserror (s_copy_file);
1103       }
1104   close (oldfd);
1105   if (close (newfd) == -1)
1106     scm_syserror (s_copy_file);
1107   return SCM_UNSPECIFIED;
1108 }
1109
1110 \f
1111 /* Filename manipulation */
1112
1113 SCM scm_dot_string;
1114
1115 SCM_PROC (s_dirname, "dirname", 1, 0, 0, scm_dirname);
1116
1117 SCM
1118 scm_dirname (SCM filename)
1119 {
1120   char *s;
1121   int i, len;
1122   SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
1123               filename,
1124               SCM_ARG1,
1125               s_dirname);
1126   s = SCM_ROCHARS (filename);
1127   len = SCM_LENGTH (filename);
1128   i = len - 1;
1129   while (i >= 0 && s[i] == '/') --i;
1130   while (i >= 0 && s[i] != '/') --i;
1131   while (i >= 0 && s[i] == '/') --i;
1132   if (i < 0)
1133     {
1134       if (len > 0 && s[0] == '/')
1135         return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
1136       else
1137         return scm_dot_string;
1138     }
1139   else
1140     return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (i + 1));
1141 }
1142
1143 SCM_PROC (s_basename, "basename", 1, 1, 0, scm_basename);
1144
1145 SCM
1146 scm_basename (SCM filename, SCM suffix)
1147 {
1148   char *f, *s = 0;
1149   int i, j, len, end;
1150   SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
1151               filename,
1152               SCM_ARG1,
1153               s_basename);
1154   SCM_ASSERT (SCM_UNBNDP (suffix)
1155               || (SCM_NIMP (suffix) && SCM_ROSTRINGP (suffix)),
1156               suffix,
1157               SCM_ARG2,
1158               s_basename);
1159   f = SCM_ROCHARS (filename);
1160   if (SCM_UNBNDP (suffix))
1161     j = -1;
1162   else
1163     {
1164       s = SCM_ROCHARS (suffix);
1165       j = SCM_LENGTH (suffix) - 1;
1166     }
1167   len = SCM_LENGTH (filename);
1168   i = len - 1;
1169   while (i >= 0 && f[i] == '/') --i;
1170   end = i;
1171   while (i >= 0 && j >= 0 && f[i] == s[j]) --i, --j;
1172   if (j == -1)
1173     end = i;
1174   while (i >= 0 && f[i] != '/') --i;
1175   if (i == end)
1176     {
1177       if (len > 0 && f[0] == '/')
1178         return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
1179       else
1180         return scm_dot_string;
1181     }
1182   else
1183     return scm_make_shared_substring (filename,
1184                                       SCM_MAKINUM (i + 1),
1185                                       SCM_MAKINUM (end + 1));
1186 }
1187
1188
1189
1190 \f
1191
1192 void
1193 scm_init_filesys ()
1194 {
1195   scm_add_feature ("i/o-extensions");
1196
1197   scm_tc16_dir = scm_make_smob_type_mfpe ("directory", 0,
1198                                          NULL, scm_dir_free,scm_dir_print, NULL);
1199
1200   scm_dot_string = scm_permanent_object (scm_makfrom0str ("."));
1201
1202 #ifdef O_RDONLY
1203 scm_sysintern ("O_RDONLY", scm_long2num (O_RDONLY));
1204 #endif
1205 #ifdef O_WRONLY
1206 scm_sysintern ("O_WRONLY", scm_long2num (O_WRONLY));
1207 #endif
1208 #ifdef O_RDWR
1209 scm_sysintern ("O_RDWR", scm_long2num (O_RDWR));
1210 #endif
1211 #ifdef O_CREAT
1212 scm_sysintern ("O_CREAT", scm_long2num (O_CREAT));
1213 #endif
1214 #ifdef O_EXCL
1215 scm_sysintern ("O_EXCL", scm_long2num (O_EXCL));
1216 #endif
1217 #ifdef O_NOCTTY
1218 scm_sysintern ("O_NOCTTY", scm_long2num (O_NOCTTY));
1219 #endif
1220 #ifdef O_TRUNC
1221 scm_sysintern ("O_TRUNC", scm_long2num (O_TRUNC));
1222 #endif
1223 #ifdef O_APPEND
1224 scm_sysintern ("O_APPEND", scm_long2num (O_APPEND));
1225 #endif
1226 #ifdef O_NONBLOCK
1227 scm_sysintern ("O_NONBLOCK", scm_long2num (O_NONBLOCK));
1228 #endif
1229 #ifdef O_NDELAY
1230 scm_sysintern ("O_NDELAY", scm_long2num (O_NDELAY));
1231 #endif
1232 #ifdef O_SYNC
1233 scm_sysintern ("O_SYNC", scm_long2num (O_SYNC));
1234 #endif
1235
1236 #ifdef F_DUPFD
1237 scm_sysintern ("F_DUPFD", scm_long2num (F_DUPFD));
1238 #endif
1239 #ifdef F_GETFD
1240 scm_sysintern ("F_GETFD", scm_long2num (F_GETFD));
1241 #endif
1242 #ifdef F_SETFD
1243 scm_sysintern ("F_SETFD", scm_long2num (F_SETFD));
1244 #endif
1245 #ifdef F_GETFL
1246 scm_sysintern ("F_GETFL", scm_long2num (F_GETFL));
1247 #endif
1248 #ifdef F_SETFL
1249 scm_sysintern ("F_SETFL", scm_long2num (F_SETFL));
1250 #endif
1251 #ifdef F_GETOWN
1252 scm_sysintern ("F_GETOWN", scm_long2num (F_GETOWN));
1253 #endif
1254 #ifdef F_SETOWN
1255 scm_sysintern ("F_SETOWN", scm_long2num (F_SETOWN));
1256 #endif
1257 #ifdef FD_CLOEXEC
1258 scm_sysintern ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC));
1259 #endif
1260
1261 #include "filesys.x"
1262 }