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_opendir, "opendir", 1, 0, 0, scm_opendir);
 585
 586 SCM
 587 scm_opendir (dirname)
 588      SCM dirname;
 589 {
 590   DIR *ds;
 591   SCM_ASSERT (SCM_NIMP (dirname) && SCM_ROSTRINGP (dirname), dirname, SCM_ARG1,
 592               s_opendir);
 593   SCM_COERCE_SUBSTR (dirname);
 594   SCM_SYSCALL (ds = opendir (SCM_ROCHARS (dirname)));
 595   if (ds == NULL)
 596     scm_syserror (s_opendir);
 597   SCM_RETURN_NEWSMOB (scm_tc16_dir | SCM_OPN, ds);
 598 }
 599
 600
 601 SCM_PROC (s_readdir, "readdir", 1, 0, 0, scm_readdir);
 602
 603 SCM
 604 scm_readdir (port)
 605      SCM port;
 606 {
 607   struct dirent *rdent;
 608   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_readdir);
 609   errno = 0;
 610   SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port)));
 611   if (errno != 0)
 612     scm_syserror (s_readdir);
 613   return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0)
 614           : SCM_EOF_VAL);
 615 }
 616
 617
 618
 619 SCM_PROC (s_rewinddir, "rewinddir", 1, 0, 0, scm_rewinddir);
 620
 621 SCM
 622 scm_rewinddir (port)
 623      SCM port;
 624 {
 625   SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_rewinddir);
 626   rewinddir ((DIR *) SCM_CDR (port));
 627   return SCM_UNSPECIFIED;
 628 }
 629
 630
 631
 632 SCM_PROC (s_closedir, "closedir", 1, 0, 0, scm_closedir);
 633
 634 SCM
 635 scm_closedir (port)
 636      SCM port;
 637 {
 638   int sts;
 639
 640   SCM_ASSERT (SCM_NIMP (port) && SCM_DIRP (port), port, SCM_ARG1, s_closedir);
 641   if (SCM_CLOSEDP (port))
 642     {
 643       return SCM_UNSPECIFIED;
 644     }
 645   SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port)));
 646   if (sts != 0)
 647     scm_syserror (s_closedir);
 648   SCM_SETCAR (port, scm_tc16_dir);
 649   return SCM_UNSPECIFIED;
 650 }
 651
 652
 653
 654
 655 static int scm_dir_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
 656
 657 static int
 658 scm_dir_print (SCM exp, SCM port, scm_print_state *pstate)
 659 {
 660   scm_puts ("#<", port);
 661   if (SCM_CLOSEDP (exp))
 662     scm_puts ("closed: ", port);
 663   scm_puts ("directory ", port);
 664   scm_intprint (SCM_CDR (exp), 16, port);
 665   scm_putc ('>', port);
 666   return 1;
 667 }
 668
 669
 670 static scm_sizet scm_dir_free SCM_P ((SCM p));
 671
 672 static scm_sizet
 673 scm_dir_free (p)
 674      SCM p;
 675 {
 676   if (SCM_OPENP (p))
 677     closedir ((DIR *) SCM_CDR (p));
 678   return 0;
 679 }
 680
 681 \f
 682 /* {Navigating Directories}
 683  */
 684
 685
 686 SCM_PROC (s_chdir, "chdir", 1, 0, 0, scm_chdir);
 687
 688 SCM
 689 scm_chdir (str)
 690      SCM str;
 691 {
 692   int ans;
 693
 694   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_chdir);
 695   SCM_COERCE_SUBSTR (str);
 696   SCM_SYSCALL (ans = chdir (SCM_ROCHARS (str)));
 697   if (ans != 0)
 698     scm_syserror (s_chdir);
 699   return SCM_UNSPECIFIED;
 700 }
 701
 702
 703
 704 SCM_PROC (s_getcwd, "getcwd", 0, 0, 0, scm_getcwd);
 705
 706 SCM
 707 scm_getcwd ()
 708 {
 709 #ifdef HAVE_GETCWD
 710   char *rv;
 711
 712   scm_sizet size = 100;
 713   char *wd;
 714   SCM result;
 715
 716   wd = scm_must_malloc (size, s_getcwd);
 717   while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
 718     {
 719       scm_must_free (wd);
 720       size *= 2;
 721       wd = scm_must_malloc (size, s_getcwd);
 722     }
 723   if (rv == 0)
 724     scm_syserror (s_getcwd);
 725   result = scm_makfromstr (wd, strlen (wd), 0);
 726   scm_must_free (wd);
 727   return result;
 728 #else
 729   scm_sysmissing (s_getcwd);
 730   /* not reached.  */
 731   return SCM_BOOL_F;
 732 #endif
 733 }
 734
 735 \f
 736
 737 SCM_PROC (s_select, "select", 3, 2, 0, scm_select);
 738
 739
 740 static int
 741 set_element (SELECT_TYPE *set, SCM element, int arg)
 742 {
 743   int fd;
 744   element = SCM_COERCE_OUTPORT (element);
 745   if (SCM_NIMP (element) && SCM_OPFPORTP (element))
 746     fd = SCM_FPORT_FDES (element);
 747   else {
 748     SCM_ASSERT (SCM_INUMP (element), element, arg, s_select);
 749     fd = SCM_INUM (element);
 750   }
 751   FD_SET (fd, set);
 752   return fd;
 753 }
 754
 755 static int
 756 fill_select_type (SELECT_TYPE *set, SCM list, int arg)
 757 {
 758   int max_fd = 0, fd;
 759   if (SCM_NIMP (list) && SCM_VECTORP (list))
 760     {
 761       int len = SCM_LENGTH (list);
 762       SCM *ve = SCM_VELTS (list);
 763
 764       while (len > 0)
 765         {
 766           fd = set_element (set, ve[len - 1], arg);
 767           if (fd > max_fd)
 768             max_fd = fd;
 769           len--;
 770         }
 771     }
 772   else
 773     {
 774       while (list != SCM_EOL)
 775         {
 776           fd = set_element (set, SCM_CAR (list), arg);
 777           if (fd > max_fd)
 778             max_fd = fd;
 779           list = SCM_CDR (list);
 780         }
 781     }
 782
 783   return max_fd;
 784 }
 785
 786 static SCM
 787 get_element (SELECT_TYPE *set, SCM element, SCM list)
 788 {
 789   element = SCM_COERCE_OUTPORT (element);
 790   if (SCM_NIMP (element) && SCM_OPFPORTP (element))
 791     {
 792       if (FD_ISSET (SCM_FPORT_FDES (element), set))
 793         list = scm_cons (element, list);
 794     }
 795   else if (SCM_INUMP (element))
 796     {
 797       if (FD_ISSET (SCM_INUM (element), set))
 798         list = scm_cons (element, list);
 799     }
 800   return list;
 801 }
 802
 803 static SCM
 804 retrieve_select_type (SELECT_TYPE *set, SCM list)
 805 {
 806   SCM answer_list = SCM_EOL;
 807
 808   if (SCM_NIMP (list) && SCM_VECTORP (list))
 809     {
 810       int len = SCM_LENGTH (list);
 811       SCM *ve = SCM_VELTS (list);
 812
 813       while (len > 0)
 814         {
 815           answer_list = get_element (set, ve[len - 1], answer_list);
 816           len--;
 817         }
 818       return scm_vector (answer_list);
 819     }
 820   else
 821     {
 822       /* list is a list.  */
 823       while (list != SCM_EOL)
 824         {
 825           answer_list = get_element (set, SCM_CAR (list), answer_list);
 826           list = SCM_CDR (list);
 827         }
 828       return answer_list;
 829     }
 830 }
 831
 832
 833 SCM
 834 scm_select (reads, writes, excepts, secs, usecs)
 835      SCM reads;
 836      SCM writes;
 837      SCM excepts;
 838      SCM secs;
 839      SCM usecs;
 840 {
 841 #ifdef HAVE_SELECT
 842   struct timeval timeout;
 843   struct timeval * time_p;
 844   SELECT_TYPE read_set;
 845   SELECT_TYPE write_set;
 846   SELECT_TYPE except_set;
 847   int max_fd, fd;
 848   int sreturn;
 849
 850 #define assert_set(x, arg) \
 851   SCM_ASSERT (scm_ilength (x) > -1 || (SCM_NIMP (x) && SCM_VECTORP (x)), \
 852               x, arg, s_select)
 853   assert_set (reads, SCM_ARG1);
 854   assert_set (writes, SCM_ARG2);
 855   assert_set (excepts, SCM_ARG3);
 856 #undef assert_set
 857
 858   FD_ZERO (&read_set);
 859   FD_ZERO (&write_set);
 860   FD_ZERO (&except_set);
 861
 862   max_fd = fill_select_type (&read_set, reads, SCM_ARG1);
 863   fd = fill_select_type (&write_set, writes, SCM_ARG2);
 864   if (fd > max_fd)
 865     max_fd = fd;
 866   fd = fill_select_type (&except_set, excepts, SCM_ARG3);
 867   if (fd > max_fd)
 868     max_fd = fd;
 869
 870   if (SCM_UNBNDP (secs) || SCM_FALSEP (secs))
 871     time_p = 0;
 872   else
 873     {
 874       if (SCM_INUMP (secs))
 875         {
 876           timeout.tv_sec = SCM_INUM (secs);
 877           if (SCM_UNBNDP (usecs))
 878             timeout.tv_usec = 0;
 879           else
 880             {
 881               SCM_ASSERT (SCM_INUMP (usecs), usecs, SCM_ARG5, s_select);
 882
 883               timeout.tv_usec = SCM_INUM (usecs);
 884             }
 885         }
 886       else
 887         {
 888           double fl = scm_num2dbl (secs, s_select);
 889
 890           if (!SCM_UNBNDP (usecs))
 891             scm_wrong_type_arg (s_select, 4, secs);
 892           if (fl > LONG_MAX)
 893             scm_out_of_range (s_select, secs);
 894           timeout.tv_sec = (long) fl;
 895           timeout.tv_usec = (long) ((fl - timeout.tv_sec) * 1000000);
 896         }
 897       time_p = &timeout;
 898     }
 899
 900 #ifdef GUILE_ISELECT
 901   sreturn = scm_internal_select (max_fd + 1,
 902                                  &read_set, &write_set, &except_set, time_p);
 903 #else
 904   sreturn = select (max_fd + 1,
 905                     &read_set, &write_set, &except_set, time_p);
 906 #endif
 907   if (sreturn < 0)
 908     scm_syserror (s_select);
 909   return scm_listify (retrieve_select_type (&read_set, reads),
 910                       retrieve_select_type (&write_set, writes),
 911                       retrieve_select_type (&except_set, excepts),
 912                       SCM_UNDEFINED);
 913 #else
 914   scm_sysmissing (s_select);
 915   /* not reached.  */
 916   return SCM_BOOL_F;
 917 #endif
 918 }
 919
 920 \f
 921
 922 SCM_PROC (s_fcntl, "fcntl", 2, 0, 1, scm_fcntl);
 923 SCM
 924 scm_fcntl (SCM object, SCM cmd, SCM value)
 925 {
 926   int rv;
 927   int fdes;
 928   int ivalue;
 929
 930   object = SCM_COERCE_OUTPORT (object);
 931
 932   SCM_ASSERT (SCM_INUMP (cmd), cmd, SCM_ARG2, s_fcntl);
 933   if (SCM_NIMP (object) && SCM_OPFPORTP (object))
 934     fdes = SCM_FPORT_FDES (object);
 935   else
 936     {
 937       SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fcntl);
 938       fdes = SCM_INUM (object);
 939     }
 940   if (SCM_NULLP (value))
 941     ivalue = 0;
 942   else
 943     {
 944       SCM_ASSERT (SCM_INUMP (SCM_CAR (value)), value, SCM_ARG3, s_fcntl);
 945       ivalue = SCM_INUM (SCM_CAR (value));
 946     }
 947   SCM_SYSCALL (rv = fcntl (fdes, SCM_INUM (cmd), ivalue));
 948   if (rv == -1)
 949     scm_syserror (s_fcntl);
 950   return SCM_MAKINUM (rv);
 951 }
 952
 953 SCM_PROC (s_fsync, "fsync", 1, 0, 0, scm_fsync);
 954 SCM
 955 scm_fsync (SCM object)
 956 {
 957   int fdes;
 958
 959   object = SCM_COERCE_OUTPORT (object);
 960
 961   if (SCM_NIMP (object) && SCM_OPFPORTP (object))
 962     {
 963       scm_flush (object);
 964       fdes = SCM_FPORT_FDES (object);
 965     }
 966   else
 967     {
 968       SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fsync);
 969       fdes = SCM_INUM (object);
 970     }
 971   if (fsync (fdes) == -1)
 972     scm_syserror (s_fsync);
 973   return SCM_UNSPECIFIED;
 974 }
 975
 976 SCM_PROC (s_symlink, "symlink", 2, 0, 0, scm_symlink);
 977
 978 SCM
 979 scm_symlink(oldpath, newpath)
 980      SCM oldpath;
 981      SCM newpath;
 982 {
 983 #ifdef HAVE_SYMLINK
 984   int val;
 985
 986   SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1,
 987               s_symlink);
 988   SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2,
 989               s_symlink);
 990   SCM_COERCE_SUBSTR (oldpath);
 991   SCM_COERCE_SUBSTR (newpath);
 992   SCM_SYSCALL (val = symlink(SCM_ROCHARS(oldpath), SCM_ROCHARS(newpath)));
 993   if (val != 0)
 994     scm_syserror (s_symlink);
 995   return SCM_UNSPECIFIED;
 996 #else
 997   scm_sysmissing (s_symlink);
 998   /* not reached.  */
 999   return SCM_BOOL_F;
1000 #endif
1001 }
1002
1003
1004 SCM_PROC (s_readlink, "readlink", 1, 0, 0, scm_readlink);
1005
1006 SCM
1007 scm_readlink(path)
1008   SCM path;
1009 {
1010 #ifdef HAVE_READLINK
1011   int rv;
1012   int size = 100;
1013   char *buf;
1014   SCM result;
1015   SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, (char *) SCM_ARG1,
1016               s_readlink);
1017   SCM_COERCE_SUBSTR (path);
1018   buf = scm_must_malloc (size, s_readlink);
1019   while ((rv = readlink (SCM_ROCHARS (path), buf, size)) == size)
1020     {
1021       scm_must_free (buf);
1022       size *= 2;
1023       buf = scm_must_malloc (size, s_readlink);
1024     }
1025   if (rv == -1)
1026     scm_syserror (s_readlink);
1027   result = scm_makfromstr (buf, rv, 0);
1028   scm_must_free (buf);
1029   return result;
1030 #else
1031   scm_sysmissing (s_readlink);
1032   /* not reached.  */
1033   return SCM_BOOL_F;
1034 #endif
1035 }
1036
1037
1038 SCM_PROC (s_lstat, "lstat", 1, 0, 0, scm_lstat);
1039
1040 SCM
1041 scm_lstat(str)
1042   SCM str;
1043 {
1044 #ifdef HAVE_LSTAT
1045   int rv;
1046   struct stat stat_temp;
1047
1048   SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, (char *) SCM_ARG1,
1049               s_lstat);
1050   SCM_COERCE_SUBSTR (str);
1051   SCM_SYSCALL(rv = lstat(SCM_ROCHARS(str), &stat_temp));
1052   if (rv != 0)
1053     {
1054       int en = errno;
1055
1056       scm_syserror_msg (s_lstat, "%s: %S",
1057                         scm_listify (scm_makfrom0str (strerror (errno)),
1058                                      str,
1059                                      SCM_UNDEFINED),
1060                         en);
1061     }
1062   return scm_stat2scm(&stat_temp);
1063 #else
1064   scm_sysmissing (s_lstat);
1065   /* not reached.  */
1066   return SCM_BOOL_F;
1067 #endif
1068 }
1069
1070
1071 SCM_PROC (s_copy_file, "copy-file", 2, 0, 0, scm_copy_file);
1072
1073 SCM
1074 scm_copy_file (oldfile, newfile)
1075      SCM oldfile;
1076      SCM newfile;
1077 {
1078   int oldfd, newfd;
1079   int n;
1080   char buf[BUFSIZ];
1081   struct stat oldstat;
1082
1083   SCM_ASSERT (SCM_NIMP (oldfile) && SCM_ROSTRINGP (oldfile), oldfile, SCM_ARG1, s_copy_file);
1084   if (SCM_SUBSTRP (oldfile))
1085     oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0);
1086   SCM_ASSERT (SCM_NIMP (newfile) && SCM_ROSTRINGP (newfile), newfile, SCM_ARG2, s_copy_file);
1087   if (SCM_SUBSTRP (newfile))
1088     newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0);
1089   if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1)
1090     scm_syserror (s_copy_file);
1091   oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY);
1092   if (oldfd == -1)
1093     scm_syserror (s_copy_file);
1094
1095   /* use POSIX flags instead of 07777?.  */
1096   newfd = open (SCM_ROCHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
1097                 oldstat.st_mode & 07777);
1098   if (newfd == -1)
1099     scm_syserror (s_copy_file);
1100
1101   while ((n = read (oldfd, buf, sizeof buf)) > 0)
1102     if (write (newfd, buf, n) != n)
1103       {
1104         close (oldfd);
1105         close (newfd);
1106         scm_syserror (s_copy_file);
1107       }
1108   close (oldfd);
1109   if (close (newfd) == -1)
1110     scm_syserror (s_copy_file);
1111   return SCM_UNSPECIFIED;
1112 }
1113
1114 \f
1115 /* Filename manipulation */
1116
1117 SCM scm_dot_string;
1118
1119 SCM_PROC (s_dirname, "dirname", 1, 0, 0, scm_dirname);
1120
1121 SCM
1122 scm_dirname (SCM filename)
1123 {
1124   char *s;
1125   int i, len;
1126   SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
1127               filename,
1128               SCM_ARG1,
1129               s_dirname);
1130   s = SCM_ROCHARS (filename);
1131   len = SCM_LENGTH (filename);
1132   i = len - 1;
1133   while (i >= 0 && s[i] == '/') --i;
1134   while (i >= 0 && s[i] != '/') --i;
1135   while (i >= 0 && s[i] == '/') --i;
1136   if (i < 0)
1137     {
1138       if (len > 0 && s[0] == '/')
1139         return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
1140       else
1141         return scm_dot_string;
1142     }
1143   else
1144     return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (i + 1));
1145 }
1146
1147 SCM_PROC (s_basename, "basename", 1, 1, 0, scm_basename);
1148
1149 SCM
1150 scm_basename (SCM filename, SCM suffix)
1151 {
1152   char *f, *s = 0;
1153   int i, j, len, end;
1154   SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
1155               filename,
1156               SCM_ARG1,
1157               s_basename);
1158   SCM_ASSERT (SCM_UNBNDP (suffix)
1159               || (SCM_NIMP (suffix) && SCM_ROSTRINGP (suffix)),
1160               suffix,
1161               SCM_ARG2,
1162               s_basename);
1163   f = SCM_ROCHARS (filename);
1164   if (SCM_UNBNDP (suffix))
1165     j = -1;
1166   else
1167     {
1168       s = SCM_ROCHARS (suffix);
1169       j = SCM_LENGTH (suffix) - 1;
1170     }
1171   len = SCM_LENGTH (filename);
1172   i = len - 1;
1173   while (i >= 0 && f[i] == '/') --i;
1174   end = i;
1175   while (i >= 0 && j >= 0 && f[i] == s[j]) --i, --j;
1176   if (j == -1)
1177     end = i;
1178   while (i >= 0 && f[i] != '/') --i;
1179   if (i == end)
1180     {
1181       if (len > 0 && f[0] == '/')
1182         return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
1183       else
1184         return scm_dot_string;
1185     }
1186   else
1187     return scm_make_shared_substring (filename,
1188                                       SCM_MAKINUM (i + 1),
1189                                       SCM_MAKINUM (end + 1));
1190 }
1191
1192
1193
1194 \f
1195
1196 void
1197 scm_init_filesys ()
1198 {
1199   scm_add_feature ("i/o-extensions");
1200
1201   scm_tc16_dir = scm_make_smob_type_mfpe ("directory", 0,
1202                                          NULL, scm_dir_free,scm_dir_print, NULL);
1203
1204   scm_dot_string = scm_permanent_object (scm_makfrom0str ("."));
1205
1206 #ifdef O_RDONLY
1207 scm_sysintern ("O_RDONLY", scm_long2num (O_RDONLY));
1208 #endif
1209 #ifdef O_WRONLY
1210 scm_sysintern ("O_WRONLY", scm_long2num (O_WRONLY));
1211 #endif
1212 #ifdef O_RDWR
1213 scm_sysintern ("O_RDWR", scm_long2num (O_RDWR));
1214 #endif
1215 #ifdef O_CREAT
1216 scm_sysintern ("O_CREAT", scm_long2num (O_CREAT));
1217 #endif
1218 #ifdef O_EXCL
1219 scm_sysintern ("O_EXCL", scm_long2num (O_EXCL));
1220 #endif
1221 #ifdef O_NOCTTY
1222 scm_sysintern ("O_NOCTTY", scm_long2num (O_NOCTTY));
1223 #endif
1224 #ifdef O_TRUNC
1225 scm_sysintern ("O_TRUNC", scm_long2num (O_TRUNC));
1226 #endif
1227 #ifdef O_APPEND
1228 scm_sysintern ("O_APPEND", scm_long2num (O_APPEND));
1229 #endif
1230 #ifdef O_NONBLOCK
1231 scm_sysintern ("O_NONBLOCK", scm_long2num (O_NONBLOCK));
1232 #endif
1233 #ifdef O_NDELAY
1234 scm_sysintern ("O_NDELAY", scm_long2num (O_NDELAY));
1235 #endif
1236 #ifdef O_SYNC
1237 scm_sysintern ("O_SYNC", scm_long2num (O_SYNC));
1238 #endif
1239
1240 #ifdef F_DUPFD
1241 scm_sysintern ("F_DUPFD", scm_long2num (F_DUPFD));
1242 #endif
1243 #ifdef F_GETFD
1244 scm_sysintern ("F_GETFD", scm_long2num (F_GETFD));
1245 #endif
1246 #ifdef F_SETFD
1247 scm_sysintern ("F_SETFD", scm_long2num (F_SETFD));
1248 #endif
1249 #ifdef F_GETFL
1250 scm_sysintern ("F_GETFL", scm_long2num (F_GETFL));
1251 #endif
1252 #ifdef F_SETFL
1253 scm_sysintern ("F_SETFL", scm_long2num (F_SETFL));
1254 #endif
1255 #ifdef F_GETOWN
1256 scm_sysintern ("F_GETOWN", scm_long2num (F_GETOWN));
1257 #endif
1258 #ifdef F_SETOWN
1259 scm_sysintern ("F_SETOWN", scm_long2num (F_SETOWN));
1260 #endif
1261 #ifdef FD_CLOEXEC
1262 scm_sysintern ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC));
1263 #endif
1264
1265 #include "filesys.x"
1266 }