1 /* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2006,
2 * 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public License
6 * as published by the Free Software Foundation; either version 3 of
7 * the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 /* This file contains POSIX file system access procedures. Procedures
23 essential to the compiler and run-time (`stat', `canonicalize-path',
24 etc.) are compiled even with `--disable-posix'. */
27 /* See stime.c for comments on why _POSIX_C_SOURCE is not always defined. */
28 #define _LARGEFILE64_SOURCE /* ask for stat64 etc */
30 #define _POSIX_C_SOURCE 199506L /* for readdir_r */
43 #include "libguile/_scm.h"
44 #include "libguile/smob.h"
45 #include "libguile/feature.h"
46 #include "libguile/fports.h"
47 #include "libguile/private-gc.h" /* for SCM_MAX */
48 #include "libguile/iselect.h"
49 #include "libguile/strings.h"
50 #include "libguile/vectors.h"
51 #include "libguile/dynwind.h"
53 #include "libguile/validate.h"
54 #include "libguile/filesys.h"
65 #ifdef TIME_WITH_SYS_TIME
66 # include <sys/time.h>
70 # include <sys/time.h>
80 #ifdef LIBC_H_WITH_UNISTD_H
84 #ifdef HAVE_SYS_SELECT_H
85 #include <sys/select.h>
92 #include <sys/types.h>
102 #define NAMLEN(dirent) strlen ((dirent)->d_name)
104 /* Some more definitions for the native Windows port. */
106 # define mkdir(path, mode) mkdir (path)
107 # define fsync(fd) _commit (fd)
108 # define fchmod(fd, mode) (-1)
109 #endif /* __MINGW32__ */
114 /* Two helper macros for an often used pattern */
116 #define STRING_SYSCALL(str,cstr,code) \
119 char *cstr = scm_to_locale_string (str); \
120 SCM_SYSCALL (code); \
121 eno = errno; free (cstr); errno = eno; \
124 #define STRING2_SYSCALL(str1,cstr1,str2,cstr2,code) \
127 char *cstr1, *cstr2; \
128 scm_dynwind_begin (0); \
129 cstr1 = scm_to_locale_string (str1); \
130 scm_dynwind_free (cstr1); \
131 cstr2 = scm_to_locale_string (str2); \
132 scm_dynwind_free (cstr2); \
133 SCM_SYSCALL (code); \
134 eno = errno; scm_dynwind_end (); errno = eno; \
145 SCM_DEFINE (scm_chown
, "chown", 3, 0, 0,
146 (SCM object
, SCM owner
, SCM group
),
147 "Change the ownership and group of the file referred to by @var{object} to\n"
148 "the integer values @var{owner} and @var{group}. @var{object} can be\n"
149 "a string containing a file name or, if the platform\n"
150 "supports fchown, a port or integer file descriptor\n"
151 "which is open on the file. The return value\n"
152 "is unspecified.\n\n"
153 "If @var{object} is a symbolic link, either the\n"
154 "ownership of the link or the ownership of the referenced file will be\n"
155 "changed depending on the operating system (lchown is\n"
156 "unsupported at present). If @var{owner} or @var{group} is specified\n"
157 "as @code{-1}, then that ID is not changed.")
158 #define FUNC_NAME s_scm_chown
162 object
= SCM_COERCE_OUTPORT (object
);
165 if (scm_is_integer (object
) || (SCM_OPFPORTP (object
)))
167 int fdes
= (SCM_OPFPORTP (object
)?
168 SCM_FPORT_FDES (object
) : scm_to_int (object
));
170 SCM_SYSCALL (rv
= fchown (fdes
, scm_to_int (owner
), scm_to_int (group
)));
175 STRING_SYSCALL (object
, c_object
,
176 rv
= chown (c_object
,
177 scm_to_int (owner
), scm_to_int (group
)));
181 return SCM_UNSPECIFIED
;
184 #endif /* HAVE_CHOWN */
188 SCM_DEFINE (scm_open_fdes
, "open-fdes", 2, 1, 0,
189 (SCM path
, SCM flags
, SCM mode
),
190 "Similar to @code{open} but return a file descriptor instead of\n"
192 #define FUNC_NAME s_scm_open_fdes
198 iflags
= SCM_NUM2INT (2, flags
);
199 imode
= SCM_NUM2INT_DEF (3, mode
, 0666);
200 STRING_SYSCALL (path
, c_path
, fd
= open_or_open64 (c_path
, iflags
, imode
));
203 return scm_from_int (fd
);
207 SCM_DEFINE (scm_open
, "open", 2, 1, 0,
208 (SCM path
, SCM flags
, SCM mode
),
209 "Open the file named by @var{path} for reading and/or writing.\n"
210 "@var{flags} is an integer specifying how the file should be opened.\n"
211 "@var{mode} is an integer specifying the permission bits of the file, if\n"
212 "it needs to be created, before the umask is applied. The default is 666\n"
213 "(Unix itself has no default).\n\n"
214 "@var{flags} can be constructed by combining variables using @code{logior}.\n"
215 "Basic flags are:\n\n"
217 "Open the file read-only.\n"
220 "Open the file write-only.\n"
223 "Open the file read/write.\n"
226 "Append to the file instead of truncating.\n"
229 "Create the file if it does not already exist.\n"
231 "See the Unix documentation of the @code{open} system call\n"
232 "for additional flags.")
233 #define FUNC_NAME s_scm_open
240 fd
= scm_to_int (scm_open_fdes (path
, flags
, mode
));
241 iflags
= SCM_NUM2INT (2, flags
);
243 if ((iflags
& O_RDWR
) == O_RDWR
)
245 /* Opened read-write. */
246 if (iflags
& O_APPEND
)
248 else if (iflags
& O_CREAT
)
255 /* Opened read-only or write-only. */
256 if (iflags
& O_APPEND
)
258 else if (iflags
& O_WRONLY
)
264 newpt
= scm_fdes_to_port (fd
, port_mode
, path
);
269 SCM_DEFINE (scm_close
, "close", 1, 0, 0,
271 "Similar to close-port (@pxref{Closing, close-port}),\n"
272 "but also works on file descriptors. A side\n"
273 "effect of closing a file descriptor is that any ports using that file\n"
274 "descriptor are moved to a different file descriptor and have\n"
275 "their revealed counts set to zero.")
276 #define FUNC_NAME s_scm_close
281 fd_or_port
= SCM_COERCE_OUTPORT (fd_or_port
);
283 if (SCM_PORTP (fd_or_port
))
284 return scm_close_port (fd_or_port
);
285 fd
= scm_to_int (fd_or_port
);
286 scm_evict_ports (fd
); /* see scsh manual. */
287 SCM_SYSCALL (rv
= close (fd
));
288 /* following scsh, closing an already closed file descriptor is
290 if (rv
< 0 && errno
!= EBADF
)
292 return scm_from_bool (rv
>= 0);
296 SCM_DEFINE (scm_close_fdes
, "close-fdes", 1, 0, 0,
298 "A simple wrapper for the @code{close} system call.\n"
299 "Close file descriptor @var{fd}, which must be an integer.\n"
300 "Unlike close (@pxref{Ports and File Descriptors, close}),\n"
301 "the file descriptor will be closed even if a port is using it.\n"
302 "The return value is unspecified.")
303 #define FUNC_NAME s_scm_close_fdes
308 c_fd
= scm_to_int (fd
);
309 SCM_SYSCALL (rv
= close (c_fd
));
312 return SCM_UNSPECIFIED
;
316 #endif /* HAVE_POSIX */
322 SCM_SYMBOL (scm_sym_regular
, "regular");
323 SCM_SYMBOL (scm_sym_directory
, "directory");
325 SCM_SYMBOL (scm_sym_symlink
, "symlink");
327 SCM_SYMBOL (scm_sym_block_special
, "block-special");
328 SCM_SYMBOL (scm_sym_char_special
, "char-special");
329 SCM_SYMBOL (scm_sym_fifo
, "fifo");
330 SCM_SYMBOL (scm_sym_sock
, "socket");
331 SCM_SYMBOL (scm_sym_unknown
, "unknown");
334 scm_stat2scm (struct stat_or_stat64
*stat_temp
)
336 SCM ans
= scm_c_make_vector (18, SCM_UNSPECIFIED
);
338 SCM_SIMPLE_VECTOR_SET(ans
, 0, scm_from_ulong (stat_temp
->st_dev
));
339 SCM_SIMPLE_VECTOR_SET(ans
, 1, scm_from_ino_t_or_ino64_t (stat_temp
->st_ino
));
340 SCM_SIMPLE_VECTOR_SET(ans
, 2, scm_from_ulong (stat_temp
->st_mode
));
341 SCM_SIMPLE_VECTOR_SET(ans
, 3, scm_from_ulong (stat_temp
->st_nlink
));
342 SCM_SIMPLE_VECTOR_SET(ans
, 4, scm_from_ulong (stat_temp
->st_uid
));
343 SCM_SIMPLE_VECTOR_SET(ans
, 5, scm_from_ulong (stat_temp
->st_gid
));
344 #ifdef HAVE_STRUCT_STAT_ST_RDEV
345 SCM_SIMPLE_VECTOR_SET(ans
, 6, scm_from_ulong (stat_temp
->st_rdev
));
347 SCM_SIMPLE_VECTOR_SET(ans
, 6, SCM_BOOL_F
);
349 SCM_SIMPLE_VECTOR_SET(ans
, 7, scm_from_off_t_or_off64_t (stat_temp
->st_size
));
350 SCM_SIMPLE_VECTOR_SET(ans
, 8, scm_from_ulong (stat_temp
->st_atime
));
351 SCM_SIMPLE_VECTOR_SET(ans
, 9, scm_from_ulong (stat_temp
->st_mtime
));
352 SCM_SIMPLE_VECTOR_SET(ans
, 10, scm_from_ulong (stat_temp
->st_ctime
));
353 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
354 SCM_SIMPLE_VECTOR_SET(ans
, 11, scm_from_ulong (stat_temp
->st_blksize
));
356 SCM_SIMPLE_VECTOR_SET(ans
, 11, scm_from_ulong (4096L));
358 #ifdef HAVE_STRUCT_STAT_ST_BLOCKS
359 SCM_SIMPLE_VECTOR_SET(ans
, 12, scm_from_blkcnt_t_or_blkcnt64_t (stat_temp
->st_blocks
));
361 SCM_SIMPLE_VECTOR_SET(ans
, 12, SCM_BOOL_F
);
364 int mode
= stat_temp
->st_mode
;
367 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_regular
);
368 else if (S_ISDIR (mode
))
369 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_directory
);
371 /* systems without symlinks probably don't have S_ISLNK */
372 else if (S_ISLNK (mode
))
373 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_symlink
);
375 else if (S_ISBLK (mode
))
376 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_block_special
);
377 else if (S_ISCHR (mode
))
378 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_char_special
);
379 else if (S_ISFIFO (mode
))
380 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_fifo
);
382 else if (S_ISSOCK (mode
))
383 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_sock
);
386 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_unknown
);
388 SCM_SIMPLE_VECTOR_SET(ans
, 14, scm_from_int ((~S_IFMT
) & mode
));
390 /* the layout of the bits in ve[14] is intended to be portable.
391 If there are systems that don't follow the usual convention,
392 the following could be used:
395 if (S_ISUID & mode) tmp += 1;
397 if (S_IRGRP & mode) tmp += 1;
399 if (S_ISVTX & mode) tmp += 1;
401 if (S_IRUSR & mode) tmp += 1;
403 if (S_IWUSR & mode) tmp += 1;
405 if (S_IXUSR & mode) tmp += 1;
407 if (S_IWGRP & mode) tmp += 1;
409 if (S_IXGRP & mode) tmp += 1;
411 if (S_IROTH & mode) tmp += 1;
413 if (S_IWOTH & mode) tmp += 1;
415 if (S_IXOTH & mode) tmp += 1;
417 SCM_SIMPLE_VECTOR_SET(ans, 14, scm_from_int (tmp));
421 #ifdef HAVE_STRUCT_STAT_ST_ATIM
422 SCM_SIMPLE_VECTOR_SET(ans
, 15, scm_from_long (stat_temp
->st_atim
.tv_nsec
));
424 SCM_SIMPLE_VECTOR_SET(ans
, 15, SCM_I_MAKINUM (0));
426 #ifdef HAVE_STRUCT_STAT_ST_MTIM
427 SCM_SIMPLE_VECTOR_SET(ans
, 16, scm_from_long (stat_temp
->st_mtim
.tv_nsec
));
429 SCM_SIMPLE_VECTOR_SET(ans
, 16, SCM_I_MAKINUM (0));
431 #ifdef HAVE_STRUCT_STAT_ST_CTIM
432 SCM_SIMPLE_VECTOR_SET(ans
, 17, scm_from_ulong (stat_temp
->st_ctim
.tv_sec
));
434 SCM_SIMPLE_VECTOR_SET(ans
, 17, SCM_I_MAKINUM (0));
442 * Try getting the appropiate stat buffer for a given file descriptor
443 * under Windows. It differentiates between file, pipe and socket
446 static int fstat_Win32 (int fdes
, struct stat
*buf
)
448 int error
, optlen
= sizeof (int);
450 memset (buf
, 0, sizeof (struct stat
));
452 /* Is this a socket ? */
453 if (getsockopt (fdes
, SOL_SOCKET
, SO_ERROR
, (void *) &error
, &optlen
) >= 0)
455 buf
->st_mode
= _S_IREAD
| _S_IWRITE
| _S_IEXEC
;
457 buf
->st_atime
= buf
->st_ctime
= buf
->st_mtime
= time (NULL
);
460 /* Maybe a regular file or pipe ? */
461 return fstat (fdes
, buf
);
463 #endif /* __MINGW32__ */
465 SCM_DEFINE (scm_stat
, "stat", 1, 1, 0,
466 (SCM object
, SCM exception_on_error
),
467 "Return an object containing various information about the file\n"
468 "determined by @var{object}. @var{object} can be a string containing\n"
469 "a file name or a port or integer file descriptor which is open\n"
470 "on a file (in which case @code{fstat} is used as the underlying\n"
473 "If the optional @var{exception_on_error} argument is true, which\n"
474 "is the default, an exception will be raised if the underlying\n"
475 "system call returns an error, for example if the file is not\n"
476 "found or is not readable. Otherwise, an error will cause\n"
477 "@code{stat} to return @code{#f}."
479 "The object returned by a successful call to @code{stat} can be\n"
480 "passed as a single parameter to the following procedures, all of\n"
481 "which return integers:\n"
485 "The device containing the file.\n"
487 "The file serial number, which distinguishes this file from all\n"
488 "other files on the same device.\n"
490 "The mode of the file. This includes file type information and\n"
491 "the file permission bits. See @code{stat:type} and\n"
492 "@code{stat:perms} below.\n"
494 "The number of hard links to the file.\n"
496 "The user ID of the file's owner.\n"
498 "The group ID of the file.\n"
500 "Device ID; this entry is defined only for character or block\n"
503 "The size of a regular file in bytes.\n"
505 "The last access time for the file.\n"
507 "The last modification time for the file.\n"
509 "The last modification time for the attributes of the file.\n"
510 "@item stat:blksize\n"
511 "The optimal block size for reading or writing the file, in\n"
513 "@item stat:blocks\n"
514 "The amount of disk space that the file occupies measured in\n"
515 "units of 512 byte blocks.\n"
518 "In addition, the following procedures return the information\n"
519 "from stat:mode in a more convenient form:\n"
523 "A symbol representing the type of file. Possible values are\n"
524 "regular, directory, symlink, block-special, char-special, fifo,\n"
525 "socket and unknown\n"
527 "An integer representing the access permission bits.\n"
529 #define FUNC_NAME s_scm_stat
533 struct stat_or_stat64 stat_temp
;
535 if (scm_is_integer (object
))
538 SCM_SYSCALL (rv
= fstat_Win32 (scm_to_int (object
), &stat_temp
));
540 SCM_SYSCALL (rv
= fstat_or_fstat64 (scm_to_int (object
), &stat_temp
));
543 else if (scm_is_string (object
))
545 char *file
= scm_to_locale_string (object
);
548 p
= file
+ strlen (file
) - 1;
549 while (p
> file
&& (*p
== '/' || *p
== '\\'))
552 SCM_SYSCALL (rv
= stat_or_stat64 (file
, &stat_temp
));
557 object
= SCM_COERCE_OUTPORT (object
);
558 SCM_VALIDATE_OPFPORT (1, object
);
559 fdes
= SCM_FPORT_FDES (object
);
561 SCM_SYSCALL (rv
= fstat_Win32 (fdes
, &stat_temp
));
563 SCM_SYSCALL (rv
= fstat_or_fstat64 (fdes
, &stat_temp
));
569 if (SCM_UNBNDP (exception_on_error
) || scm_is_true (exception_on_error
))
572 SCM_SYSERROR_MSG ("~A: ~S",
573 scm_list_2 (scm_strerror (scm_from_int (en
)),
580 return scm_stat2scm (&stat_temp
);
585 SCM_DEFINE (scm_lstat
, "lstat", 1, 0, 0,
587 "Similar to @code{stat}, but does not follow symbolic links, i.e.,\n"
588 "it will return information about a symbolic link itself, not the\n"
589 "file it points to. @var{str} must be a string.")
590 #define FUNC_NAME s_scm_lstat
593 struct stat_or_stat64 stat_temp
;
595 STRING_SYSCALL (str
, c_str
, rv
= lstat_or_lstat64 (c_str
, &stat_temp
));
600 SCM_SYSERROR_MSG ("~A: ~S",
601 scm_list_2 (scm_strerror (scm_from_int (en
)), str
),
604 return scm_stat2scm (&stat_temp
);
607 #endif /* HAVE_LSTAT */
612 /* {Modifying Directories}
616 SCM_DEFINE (scm_link
, "link", 2, 0, 0,
617 (SCM oldpath
, SCM newpath
),
618 "Creates a new name @var{newpath} in the file system for the\n"
619 "file named by @var{oldpath}. If @var{oldpath} is a symbolic\n"
620 "link, the link may or may not be followed depending on the\n"
622 #define FUNC_NAME s_scm_link
626 STRING2_SYSCALL (oldpath
, c_oldpath
,
628 val
= link (c_oldpath
, c_newpath
));
631 return SCM_UNSPECIFIED
;
634 #endif /* HAVE_LINK */
637 /* {Navigating Directories}
641 SCM_DEFINE (scm_chdir
, "chdir", 1, 0, 0,
643 "Change the current working directory to @var{str}.\n"
644 "The return value is unspecified.")
645 #define FUNC_NAME s_scm_chdir
649 STRING_SYSCALL (str
, c_str
, ans
= chdir (c_str
));
652 return SCM_UNSPECIFIED
;
660 /* check that element is a port or file descriptor. if it's a port
661 and its buffer is ready for use, add it to the ports_ready list.
662 otherwise add its file descriptor to *set. the type of list can be
663 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
664 SCM_ARG3 for excepts. */
666 set_element (SELECT_TYPE
*set
, SCM
*ports_ready
, SCM element
, int pos
)
670 if (scm_is_integer (element
))
672 fd
= scm_to_int (element
);
678 element
= SCM_COERCE_OUTPORT (element
);
679 SCM_ASSERT (SCM_OPFPORTP (element
), element
, pos
, "select");
682 /* check whether port has buffered input. */
683 scm_t_port
*pt
= SCM_PTAB_ENTRY (element
);
685 if (pt
->read_pos
< pt
->read_end
)
688 else if (pos
== SCM_ARG2
)
690 /* check whether port's output buffer has room. */
691 scm_t_port
*pt
= SCM_PTAB_ENTRY (element
);
693 /* > 1 since writing the last byte in the buffer causes flush. */
694 if (pt
->write_end
- pt
->write_pos
> 1)
697 fd
= use_buf
? -1 : SCM_FPORT_FDES (element
);
700 *ports_ready
= scm_cons (element
, *ports_ready
);
706 /* check list_or_vec, a list or vector of ports or file descriptors,
707 adding each member to either the ports_ready list (if it's a port
708 with a usable buffer) or to *set. the kind of list_or_vec can be
709 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
710 SCM_ARG3 for excepts. */
712 fill_select_type (SELECT_TYPE
*set
, SCM
*ports_ready
, SCM list_or_vec
, int pos
)
716 if (scm_is_simple_vector (list_or_vec
))
718 int i
= SCM_SIMPLE_VECTOR_LENGTH (list_or_vec
);
722 int fd
= set_element (set
, ports_ready
,
723 SCM_SIMPLE_VECTOR_REF (list_or_vec
, i
), pos
);
731 while (!SCM_NULL_OR_NIL_P (list_or_vec
))
733 int fd
= set_element (set
, ports_ready
, SCM_CAR (list_or_vec
), pos
);
737 list_or_vec
= SCM_CDR (list_or_vec
);
744 /* if element (a file descriptor or port) appears in *set, cons it to
745 list. return list. */
747 get_element (SELECT_TYPE
*set
, SCM element
, SCM list
)
751 if (scm_is_integer (element
))
753 fd
= scm_to_int (element
);
757 fd
= SCM_FPORT_FDES (SCM_COERCE_OUTPORT (element
));
759 if (FD_ISSET (fd
, set
))
760 list
= scm_cons (element
, list
);
764 /* construct component of scm_select return value.
765 set: pointer to set of file descriptors found by select to be ready
766 ports_ready: ports ready due to buffering
767 list_or_vec: original list/vector handed to scm_select.
768 the return value is a list/vector of ready ports/file descriptors.
769 works by finding the objects in list which correspond to members of
770 *set and appending them to ports_ready. result is converted to a
771 vector if list_or_vec is a vector. */
773 retrieve_select_type (SELECT_TYPE
*set
, SCM ports_ready
, SCM list_or_vec
)
775 SCM answer_list
= ports_ready
;
777 if (scm_is_simple_vector (list_or_vec
))
779 int i
= SCM_SIMPLE_VECTOR_LENGTH (list_or_vec
);
783 answer_list
= get_element (set
,
784 SCM_SIMPLE_VECTOR_REF (list_or_vec
, i
),
787 return scm_vector (answer_list
);
791 /* list_or_vec must be a list. */
792 while (!SCM_NULL_OR_NIL_P (list_or_vec
))
794 answer_list
= get_element (set
, SCM_CAR (list_or_vec
), answer_list
);
795 list_or_vec
= SCM_CDR (list_or_vec
);
801 /* Static helper functions above refer to s_scm_select directly as s_select */
802 SCM_DEFINE (scm_select
, "select", 3, 2, 0,
803 (SCM reads
, SCM writes
, SCM excepts
, SCM secs
, SCM usecs
),
804 "This procedure has a variety of uses: waiting for the ability\n"
805 "to provide input, accept output, or the existence of\n"
806 "exceptional conditions on a collection of ports or file\n"
807 "descriptors, or waiting for a timeout to occur.\n"
808 "It also returns if interrupted by a signal.\n\n"
809 "@var{reads}, @var{writes} and @var{excepts} can be lists or\n"
810 "vectors, with each member a port or a file descriptor.\n"
811 "The value returned is a list of three corresponding\n"
812 "lists or vectors containing only the members which meet the\n"
813 "specified requirement. The ability of port buffers to\n"
814 "provide input or accept output is taken into account.\n"
815 "Ordering of the input lists or vectors is not preserved.\n\n"
816 "The optional arguments @var{secs} and @var{usecs} specify the\n"
817 "timeout. Either @var{secs} can be specified alone, as\n"
818 "either an integer or a real number, or both @var{secs} and\n"
819 "@var{usecs} can be specified as integers, in which case\n"
820 "@var{usecs} is an additional timeout expressed in\n"
821 "microseconds. If @var{secs} is omitted or is @code{#f} then\n"
822 "select will wait for as long as it takes for one of the other\n"
823 "conditions to be satisfied.\n\n"
824 "The scsh version of @code{select} differs as follows:\n"
825 "Only vectors are accepted for the first three arguments.\n"
826 "The @var{usecs} argument is not supported.\n"
827 "Multiple values are returned instead of a list.\n"
828 "Duplicates in the input vectors appear only once in output.\n"
829 "An additional @code{select!} interface is provided.")
830 #define FUNC_NAME s_scm_select
832 struct timeval timeout
;
833 struct timeval
* time_ptr
;
834 SELECT_TYPE read_set
;
835 SELECT_TYPE write_set
;
836 SELECT_TYPE except_set
;
840 /* these lists accumulate ports which are ready due to buffering.
841 their file descriptors don't need to be added to the select sets. */
842 SCM read_ports_ready
= SCM_EOL
;
843 SCM write_ports_ready
= SCM_EOL
;
846 if (scm_is_simple_vector (reads
))
848 read_count
= SCM_SIMPLE_VECTOR_LENGTH (reads
);
852 read_count
= scm_ilength (reads
);
853 SCM_ASSERT (read_count
>= 0, reads
, SCM_ARG1
, FUNC_NAME
);
855 if (scm_is_simple_vector (writes
))
857 write_count
= SCM_SIMPLE_VECTOR_LENGTH (writes
);
861 write_count
= scm_ilength (writes
);
862 SCM_ASSERT (write_count
>= 0, writes
, SCM_ARG2
, FUNC_NAME
);
864 if (scm_is_simple_vector (excepts
))
866 except_count
= SCM_SIMPLE_VECTOR_LENGTH (excepts
);
870 except_count
= scm_ilength (excepts
);
871 SCM_ASSERT (except_count
>= 0, excepts
, SCM_ARG3
, FUNC_NAME
);
875 FD_ZERO (&write_set
);
876 FD_ZERO (&except_set
);
878 max_fd
= fill_select_type (&read_set
, &read_ports_ready
, reads
, SCM_ARG1
);
881 int write_max
= fill_select_type (&write_set
, &write_ports_ready
,
883 int except_max
= fill_select_type (&except_set
, NULL
,
886 if (write_max
> max_fd
)
888 if (except_max
> max_fd
)
892 /* if there's a port with a ready buffer, don't block, just
893 check for ready file descriptors. */
894 if (!scm_is_null (read_ports_ready
) || !scm_is_null (write_ports_ready
))
900 else if (SCM_UNBNDP (secs
) || scm_is_false (secs
))
904 if (scm_is_unsigned_integer (secs
, 0, ULONG_MAX
))
906 timeout
.tv_sec
= scm_to_ulong (secs
);
907 if (SCM_UNBNDP (usecs
))
910 timeout
.tv_usec
= scm_to_long (usecs
);
914 double fl
= scm_to_double (secs
);
916 if (!SCM_UNBNDP (usecs
))
917 SCM_WRONG_TYPE_ARG (4, secs
);
919 SCM_OUT_OF_RANGE (4, secs
);
920 timeout
.tv_sec
= (long) fl
;
921 timeout
.tv_usec
= (long) ((fl
- timeout
.tv_sec
) * 1000000);
927 int rv
= scm_std_select (max_fd
+ 1,
928 &read_set
, &write_set
, &except_set
,
933 return scm_list_3 (retrieve_select_type (&read_set
, read_ports_ready
, reads
),
934 retrieve_select_type (&write_set
, write_ports_ready
, writes
),
935 retrieve_select_type (&except_set
, SCM_EOL
, excepts
));
938 #endif /* HAVE_SELECT */
943 SCM_DEFINE (scm_fcntl
, "fcntl", 2, 1, 0,
944 (SCM object
, SCM cmd
, SCM value
),
945 "Apply @var{cmd} to the specified file descriptor or the underlying\n"
946 "file descriptor of the specified port. @var{value} is an optional\n"
947 "integer argument.\n\n"
948 "Values for @var{cmd} are:\n\n"
951 "Duplicate a file descriptor\n"
953 "Get flags associated with the file descriptor.\n"
955 "Set flags associated with the file descriptor to @var{value}.\n"
957 "Get flags associated with the open file.\n"
959 "Set flags associated with the open file to @var{value}\n"
961 "Get the process ID of a socket's owner, for @code{SIGIO} signals.\n"
963 "Set the process that owns a socket to @var{value}, for @code{SIGIO} signals.\n"
965 "The value used to indicate the \"close on exec\" flag with @code{F_GETFL} or\n"
968 #define FUNC_NAME s_scm_fcntl
974 object
= SCM_COERCE_OUTPORT (object
);
976 if (SCM_OPFPORTP (object
))
977 fdes
= SCM_FPORT_FDES (object
);
979 fdes
= scm_to_int (object
);
981 if (SCM_UNBNDP (value
))
984 ivalue
= scm_to_int (value
);
986 SCM_SYSCALL (rv
= fcntl (fdes
, scm_to_int (cmd
), ivalue
));
989 return scm_from_int (rv
);
992 #endif /* HAVE_FCNTL */
994 SCM_DEFINE (scm_fsync
, "fsync", 1, 0, 0,
996 "Copies any unwritten data for the specified output file\n"
997 "descriptor to disk. If @var{object} is a port, its buffer is\n"
998 "flushed before the underlying file descriptor is fsync'd.\n"
999 "The return value is unspecified.")
1000 #define FUNC_NAME s_scm_fsync
1004 object
= SCM_COERCE_OUTPORT (object
);
1006 if (SCM_OPFPORTP (object
))
1008 scm_flush_unlocked (object
);
1009 fdes
= SCM_FPORT_FDES (object
);
1012 fdes
= scm_to_int (object
);
1014 if (fsync (fdes
) == -1)
1016 return SCM_UNSPECIFIED
;
1021 SCM_DEFINE (scm_symlink
, "symlink", 2, 0, 0,
1022 (SCM oldpath
, SCM newpath
),
1023 "Create a symbolic link named @var{oldpath} with the value\n"
1024 "(i.e., pointing to) @var{newpath}. The return value is\n"
1026 #define FUNC_NAME s_scm_symlink
1030 STRING2_SYSCALL (oldpath
, c_oldpath
,
1032 val
= symlink (c_oldpath
, c_newpath
));
1035 return SCM_UNSPECIFIED
;
1038 #endif /* HAVE_SYMLINK */
1040 #ifdef HAVE_READLINK
1041 SCM_DEFINE (scm_readlink
, "readlink", 1, 0, 0,
1043 "Return the value of the symbolic link named by @var{path} (a\n"
1044 "string), i.e., the file that the link points to.")
1045 #define FUNC_NAME s_scm_readlink
1053 scm_dynwind_begin (0);
1055 c_path
= scm_to_locale_string (path
);
1056 scm_dynwind_free (c_path
);
1058 buf
= scm_malloc (size
);
1060 while ((rv
= readlink (c_path
, buf
, size
)) == size
)
1064 buf
= scm_malloc (size
);
1068 int save_errno
= errno
;
1073 result
= scm_take_locale_stringn (buf
, rv
);
1079 #endif /* HAVE_READLINK */
1081 SCM_DEFINE (scm_copy_file
, "copy-file", 2, 0, 0,
1082 (SCM oldfile
, SCM newfile
),
1083 "Copy the file specified by @var{oldfile} to @var{newfile}.\n"
1084 "The return value is unspecified.")
1085 #define FUNC_NAME s_scm_copy_file
1087 char *c_oldfile
, *c_newfile
;
1091 struct stat_or_stat64 oldstat
;
1093 scm_dynwind_begin (0);
1095 c_oldfile
= scm_to_locale_string (oldfile
);
1096 scm_dynwind_free (c_oldfile
);
1097 c_newfile
= scm_to_locale_string (newfile
);
1098 scm_dynwind_free (c_newfile
);
1100 oldfd
= open_or_open64 (c_oldfile
, O_RDONLY
);
1105 SCM_SYSCALL (rv
= fstat_Win32 (oldfd
, &oldstat
));
1107 SCM_SYSCALL (rv
= fstat_or_fstat64 (oldfd
, &oldstat
));
1110 goto err_close_oldfd
;
1112 /* use POSIX flags instead of 07777?. */
1113 newfd
= open_or_open64 (c_newfile
, O_WRONLY
| O_CREAT
| O_TRUNC
,
1114 oldstat
.st_mode
& 07777);
1122 while ((n
= read (oldfd
, buf
, sizeof buf
)) > 0)
1123 if (write (newfd
, buf
, n
) != n
)
1130 if (close (newfd
) == -1)
1134 return SCM_UNSPECIFIED
;
1138 #endif /* HAVE_POSIX */
1141 /* Essential procedures used in (system base compile). */
1144 SCM_DEFINE (scm_getcwd
, "getcwd", 0, 0, 0,
1146 "Return the name of the current working directory.")
1147 #define FUNC_NAME s_scm_getcwd
1154 wd
= scm_malloc (size
);
1155 while ((rv
= getcwd (wd
, size
)) == 0 && errno
== ERANGE
)
1159 wd
= scm_malloc (size
);
1163 int save_errno
= errno
;
1168 result
= scm_from_locale_stringn (wd
, strlen (wd
));
1173 #endif /* HAVE_GETCWD */
1176 SCM_DEFINE (scm_mkdir
, "mkdir", 1, 1, 0,
1177 (SCM path
, SCM mode
),
1178 "Create a new directory named by @var{path}. If @var{mode} is omitted\n"
1179 "then the permissions of the directory file are set using the current\n"
1180 "umask. Otherwise they are set to the decimal value specified with\n"
1181 "@var{mode}. The return value is unspecified.")
1182 #define FUNC_NAME s_scm_mkdir
1187 if (SCM_UNBNDP (mode
))
1191 STRING_SYSCALL (path
, c_path
, rv
= mkdir (c_path
, 0777 ^ mask
));
1195 STRING_SYSCALL (path
, c_path
, rv
= mkdir (c_path
, scm_to_uint (mode
)));
1199 return SCM_UNSPECIFIED
;
1202 #endif /* HAVE_MKDIR */
1205 SCM_DEFINE (scm_rmdir
, "rmdir", 1, 0, 0,
1207 "Remove the existing directory named by @var{path}. The directory must\n"
1208 "be empty for this to succeed. The return value is unspecified.")
1209 #define FUNC_NAME s_scm_rmdir
1213 STRING_SYSCALL (path
, c_path
, val
= rmdir (c_path
));
1216 return SCM_UNSPECIFIED
;
1222 #define my_rename rename
1225 my_rename (const char *oldname
, const char *newname
)
1229 SCM_SYSCALL (rv
= link (oldname
, newname
));
1232 SCM_SYSCALL (rv
= unlink (oldname
));
1234 /* unlink failed. remove new name */
1235 SCM_SYSCALL (unlink (newname
));
1241 SCM_DEFINE (scm_rename
, "rename-file", 2, 0, 0,
1242 (SCM oldname
, SCM newname
),
1243 "Renames the file specified by @var{oldname} to @var{newname}.\n"
1244 "The return value is unspecified.")
1245 #define FUNC_NAME s_scm_rename
1249 STRING2_SYSCALL (oldname
, c_oldname
,
1251 rv
= my_rename (c_oldname
, c_newname
));
1254 return SCM_UNSPECIFIED
;
1259 SCM_DEFINE (scm_delete_file
, "delete-file", 1, 0, 0,
1261 "Deletes (or \"unlinks\") the file specified by @var{str}.")
1262 #define FUNC_NAME s_scm_delete_file
1265 STRING_SYSCALL (str
, c_str
, ans
= unlink (c_str
));
1268 return SCM_UNSPECIFIED
;
1272 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1273 (SCM path
, SCM how
),
1274 "Test accessibility of a file under the real UID and GID of the\n"
1275 "calling process. The return is @code{#t} if @var{path} exists\n"
1276 "and the permissions requested by @var{how} are all allowed, or\n"
1277 "@code{#f} if not.\n"
1279 "@var{how} is an integer which is one of the following values,\n"
1280 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1283 "Test for read permission.\n"
1286 "Test for write permission.\n"
1289 "Test for execute permission.\n"
1292 "Test for existence of the file. This is implied by each of the\n"
1293 "other tests, so there's no need to combine it with them.\n"
1296 "It's important to note that @code{access?} does not simply\n"
1297 "indicate what will happen on attempting to read or write a\n"
1298 "file. In normal circumstances it does, but in a set-UID or\n"
1299 "set-GID program it doesn't because @code{access?} tests the\n"
1300 "real ID, whereas an open or execute attempt uses the effective\n"
1303 "A program which will never run set-UID/GID can ignore the\n"
1304 "difference between real and effective IDs, but for maximum\n"
1305 "generality, especially in library functions, it's best not to\n"
1306 "use @code{access?} to predict the result of an open or execute,\n"
1307 "instead simply attempt that and catch any exception.\n"
1309 "The main use for @code{access?} is to let a set-UID/GID program\n"
1310 "determine what the invoking user would have been allowed to do,\n"
1311 "without the greater (or perhaps lesser) privileges afforded by\n"
1312 "the effective ID. For more on this, see ``Testing File\n"
1313 "Access'' in The GNU C Library Reference Manual.")
1314 #define FUNC_NAME s_scm_access
1319 c_path
= scm_to_locale_string (path
);
1320 rv
= access (c_path
, scm_to_int (how
));
1323 return scm_from_bool (!rv
);
1327 SCM_DEFINE (scm_chmod
, "chmod", 2, 0, 0,
1328 (SCM object
, SCM mode
),
1329 "Changes the permissions of the file referred to by\n"
1330 "@var{object}. @var{object} can be a string containing a file\n"
1331 "name or a port or integer file descriptor which is open on a\n"
1332 "file (in which case @code{fchmod} is used as the underlying\n"
1333 "system call). @var{mode} specifies the new permissions as a\n"
1334 "decimal number, e.g., @code{(chmod \"foo\" #o755)}.\n"
1335 "The return value is unspecified.")
1336 #define FUNC_NAME s_scm_chmod
1341 object
= SCM_COERCE_OUTPORT (object
);
1343 if (scm_is_integer (object
) || SCM_OPFPORTP (object
))
1345 if (scm_is_integer (object
))
1346 fdes
= scm_to_int (object
);
1348 fdes
= SCM_FPORT_FDES (object
);
1349 SCM_SYSCALL (rv
= fchmod (fdes
, scm_to_int (mode
)));
1353 STRING_SYSCALL (object
, c_object
,
1354 rv
= chmod (c_object
, scm_to_int (mode
)));
1358 return SCM_UNSPECIFIED
;
1362 SCM_DEFINE (scm_umask
, "umask", 0, 1, 0,
1364 "If @var{mode} is omitted, returns a decimal number representing the current\n"
1365 "file creation mask. Otherwise the file creation mask is set to\n"
1366 "@var{mode} and the previous value is returned.\n\n"
1367 "E.g., @code{(umask #o022)} sets the mask to octal 22, decimal 18.")
1368 #define FUNC_NAME s_scm_umask
1371 if (SCM_UNBNDP (mode
))
1378 mask
= umask (scm_to_uint (mode
));
1380 return scm_from_uint (mask
);
1384 #ifndef HAVE_MKSTEMP
1385 extern int mkstemp (char *);
1388 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1390 "Create a new unique file in the file system and return a new\n"
1391 "buffered port open for reading and writing to the file.\n"
1393 "@var{tmpl} is a string specifying where the file should be\n"
1394 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1395 "will be changed in the string to return the name of the file.\n"
1396 "(@code{port-filename} on the port also gives the name.)\n"
1398 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1399 "and most systems it's @code{#o600}. An application can use\n"
1400 "@code{chmod} to relax that if desired. For example\n"
1401 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1405 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1406 " (chmod port (logand #o666 (lognot (umask))))\n"
1409 #define FUNC_NAME s_scm_mkstemp
1414 scm_dynwind_begin (0);
1416 c_tmpl
= scm_to_locale_string (tmpl
);
1417 scm_dynwind_free (c_tmpl
);
1419 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1423 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1424 SCM_INUM0
, scm_string_length (tmpl
),
1428 return scm_fdes_to_port (rv
, "w+", tmpl
);
1433 /* Filename manipulation */
1437 SCM_DEFINE (scm_dirname
, "dirname", 1, 0, 0,
1439 "Return the directory name component of the file name\n"
1440 "@var{filename}. If @var{filename} does not contain a directory\n"
1441 "component, @code{.} is returned.")
1442 #define FUNC_NAME s_scm_dirname
1445 unsigned long int len
;
1447 SCM_VALIDATE_STRING (1, filename
);
1449 len
= scm_i_string_length (filename
);
1453 while (i
>= 0 && (scm_i_string_ref (filename
, i
) == '/'
1454 || scm_i_string_ref (filename
, i
) == '\\'))
1456 while (i
>= 0 && (scm_i_string_ref (filename
, i
) != '/'
1457 && scm_i_string_ref (filename
, i
) != '\\'))
1459 while (i
>= 0 && (scm_i_string_ref (filename
, i
) == '/'
1460 || scm_i_string_ref (filename
, i
) == '\\'))
1463 while (i
>= 0 && scm_i_string_ref (filename
, i
) == '/')
1465 while (i
>= 0 && scm_i_string_ref (filename
, i
) != '/')
1467 while (i
>= 0 && scm_i_string_ref (filename
, i
) == '/')
1469 #endif /* ndef __MINGW32__ */
1473 if (len
> 0 && (scm_i_string_ref (filename
, 0) == '/'
1474 || scm_i_string_ref (filename
, 0) == '\\'))
1476 if (len
> 0 && scm_i_string_ref (filename
, 0) == '/')
1477 #endif /* ndef __MINGW32__ */
1478 return scm_c_substring (filename
, 0, 1);
1480 return scm_dot_string
;
1483 return scm_c_substring (filename
, 0, i
+ 1);
1487 SCM_DEFINE (scm_basename
, "basename", 1, 1, 0,
1488 (SCM filename
, SCM suffix
),
1489 "Return the base name of the file name @var{filename}. The\n"
1490 "base name is the file name without any directory components.\n"
1491 "If @var{suffix} is provided, and is equal to the end of\n"
1492 "@var{filename}, it is removed also.")
1493 #define FUNC_NAME s_scm_basename
1497 SCM_VALIDATE_STRING (1, filename
);
1498 len
= scm_i_string_length (filename
);
1500 if (SCM_UNBNDP (suffix
))
1504 SCM_VALIDATE_STRING (2, suffix
);
1505 j
= scm_i_string_length (suffix
) - 1;
1509 while (i
>= 0 && (scm_i_string_ref (filename
, i
) == '/'
1510 || scm_i_string_ref (filename
, i
) == '\\'))
1513 while (i
>= 0 && scm_i_string_ref (filename
, i
) == '/')
1515 #endif /* ndef __MINGW32__ */
1517 while (i
>= 0 && j
>= 0
1518 && (scm_i_string_ref (filename
, i
)
1519 == scm_i_string_ref (suffix
, j
)))
1527 while (i
>= 0 && (scm_i_string_ref (filename
, i
) != '/'
1528 && scm_i_string_ref (filename
, i
) != '\\'))
1531 while (i
>= 0 && scm_i_string_ref (filename
, i
) != '/')
1533 #endif /* ndef __MINGW32__ */
1537 if (len
> 0 && (scm_i_string_ref (filename
, 0) == '/'
1538 || scm_i_string_ref (filename
, 0) == '\\'))
1540 if (len
> 0 && scm_i_string_ref (filename
, 0) == '/')
1541 #endif /* ndef __MINGW32__ */
1542 return scm_c_substring (filename
, 0, 1);
1544 return scm_dot_string
;
1547 return scm_c_substring (filename
, i
+1, end
+1);
1551 SCM_DEFINE (scm_canonicalize_path
, "canonicalize-path", 1, 0, 0,
1553 "Return the canonical path of @var{path}. A canonical path has\n"
1554 "no @code{.} or @code{..} components, nor any repeated path\n"
1555 "separators (@code{/}) nor symlinks.\n\n"
1556 "Raises an error if any component of @var{path} does not exist.")
1557 #define FUNC_NAME s_scm_canonicalize_path
1561 SCM_VALIDATE_STRING (1, path
);
1563 str
= scm_to_locale_string (path
);
1564 canon
= canonicalize_file_name (str
);
1568 return scm_take_locale_string (canon
);
1575 scm_i_relativize_path (SCM path
, SCM in_path
)
1580 str
= scm_to_locale_string (path
);
1581 canon
= canonicalize_file_name (str
);
1587 scanon
= scm_take_locale_string (canon
);
1589 for (; scm_is_pair (in_path
); in_path
= scm_cdr (in_path
))
1590 if (scm_is_true (scm_string_prefix_p (scm_car (in_path
),
1592 SCM_UNDEFINED
, SCM_UNDEFINED
,
1593 SCM_UNDEFINED
, SCM_UNDEFINED
)))
1595 size_t len
= scm_c_string_length (scm_car (in_path
));
1597 /* The path either has a trailing delimiter or doesn't. scanon will be
1598 delimited by single delimiters. In the case in which the path does
1599 not have a trailing delimiter, add one to the length to strip off the
1600 delimiter within scanon. */
1603 || (scm_i_string_ref (scm_car (in_path
), len
- 1) != '/'
1604 && scm_i_string_ref (scm_car (in_path
), len
- 1) != '\\')
1606 || scm_i_string_ref (scm_car (in_path
), len
- 1) != '/'
1611 if (scm_c_string_length (scanon
) > len
)
1612 return scm_substring (scanon
, scm_from_size_t (len
), SCM_UNDEFINED
);
1621 /* Examining directories. These procedures are used by `check-guile'
1622 and thus compiled unconditionally. */
1624 scm_t_bits scm_tc16_dir
;
1627 SCM_DEFINE (scm_directory_stream_p
, "directory-stream?", 1, 0, 0,
1629 "Return a boolean indicating whether @var{obj} is a directory\n"
1630 "stream as returned by @code{opendir}.")
1631 #define FUNC_NAME s_scm_directory_stream_p
1633 return scm_from_bool (SCM_DIRP (obj
));
1638 SCM_DEFINE (scm_opendir
, "opendir", 1, 0, 0,
1640 "Open the directory specified by @var{dirname} and return a directory\n"
1642 #define FUNC_NAME s_scm_opendir
1645 STRING_SYSCALL (dirname
, c_dirname
, ds
= opendir (c_dirname
));
1648 SCM_RETURN_NEWSMOB (scm_tc16_dir
| (SCM_DIR_FLAG_OPEN
<<16), ds
);
1653 /* FIXME: The glibc manual has a portability note that readdir_r may not
1654 null-terminate its return string. The circumstances outlined for this
1655 are not clear, nor is it clear what should be done about it. Lets use
1656 NAMLEN and worry about what else should be done if/when someone can
1659 SCM_DEFINE (scm_readdir
, "readdir", 1, 0, 0,
1661 "Return (as a string) the next directory entry from the directory stream\n"
1662 "@var{port}. If there is no remaining entry to be read then the\n"
1663 "end of file object is returned.")
1664 #define FUNC_NAME s_scm_readdir
1666 struct dirent_or_dirent64
*rdent
;
1668 SCM_VALIDATE_DIR (1, port
);
1669 if (!SCM_DIR_OPEN_P (port
))
1670 SCM_MISC_ERROR ("Directory ~S is not open.", scm_list_1 (port
));
1673 /* As noted in the glibc manual, on various systems (such as Solaris) the
1674 d_name[] field is only 1 char and you're expected to size the dirent
1675 buffer for readdir_r based on NAME_MAX. The SCM_MAX expressions below
1676 effectively give either sizeof(d_name) or NAME_MAX+1, whichever is
1679 On solaris 10 there's no NAME_MAX constant, it's necessary to use
1680 pathconf(). We prefer NAME_MAX though, since it should be a constant
1681 and will therefore save a system call. We also prefer it since dirfd()
1682 is not available everywhere.
1684 An alternative to dirfd() would be to open() the directory and then use
1685 fdopendir(), if the latter is available. That'd let us hold the fd
1686 somewhere in the smob, or just the dirent size calculated once. */
1688 struct dirent_or_dirent64 de
; /* just for sizeof */
1689 DIR *ds
= (DIR *) SCM_SMOB_DATA_1 (port
);
1691 char buf
[SCM_MAX (sizeof (de
),
1692 sizeof (de
) - sizeof (de
.d_name
) + NAME_MAX
+ 1)];
1695 long name_max
= fpathconf (dirfd (ds
), _PC_NAME_MAX
);
1698 buf
= alloca (SCM_MAX (sizeof (de
),
1699 sizeof (de
) - sizeof (de
.d_name
) + name_max
+ 1));
1703 SCM_SYSCALL (readdir_r_or_readdir64_r (ds
, (struct dirent_or_dirent64
*) buf
, &rdent
));
1709 return (rdent
? scm_from_locale_stringn (rdent
->d_name
, NAMLEN (rdent
))
1715 scm_dynwind_begin (0);
1716 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1719 SCM_SYSCALL (rdent
= readdir_or_readdir64 ((DIR *) SCM_SMOB_DATA_1 (port
)));
1723 ret
= (rdent
? scm_from_locale_stringn (rdent
->d_name
, NAMLEN (rdent
))
1734 SCM_DEFINE (scm_rewinddir
, "rewinddir", 1, 0, 0,
1736 "Reset the directory port @var{port} so that the next call to\n"
1737 "@code{readdir} will return the first directory entry.")
1738 #define FUNC_NAME s_scm_rewinddir
1740 SCM_VALIDATE_DIR (1, port
);
1741 if (!SCM_DIR_OPEN_P (port
))
1742 SCM_MISC_ERROR ("Directory ~S is not open.", scm_list_1 (port
));
1744 rewinddir ((DIR *) SCM_SMOB_DATA_1 (port
));
1746 return SCM_UNSPECIFIED
;
1751 SCM_DEFINE (scm_closedir
, "closedir", 1, 0, 0,
1753 "Close the directory stream @var{port}.\n"
1754 "The return value is unspecified.")
1755 #define FUNC_NAME s_scm_closedir
1757 SCM_VALIDATE_DIR (1, port
);
1759 if (SCM_DIR_OPEN_P (port
))
1763 SCM_SYSCALL (sts
= closedir ((DIR *) SCM_SMOB_DATA_1 (port
)));
1767 SCM_SET_SMOB_DATA_0 (port
, scm_tc16_dir
);
1770 return SCM_UNSPECIFIED
;
1777 scm_dir_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
1779 scm_puts_unlocked ("#<", port
);
1780 if (!SCM_DIR_OPEN_P (exp
))
1781 scm_puts_unlocked ("closed: ", port
);
1782 scm_puts_unlocked ("directory stream ", port
);
1783 scm_uintprint (SCM_SMOB_DATA_1 (exp
), 16, port
);
1784 scm_putc_unlocked ('>', port
);
1790 scm_dir_free (SCM p
)
1792 if (SCM_DIR_OPEN_P (p
))
1793 closedir ((DIR *) SCM_SMOB_DATA_1 (p
));
1804 scm_tc16_dir
= scm_make_smob_type ("directory", 0);
1805 scm_set_smob_free (scm_tc16_dir
, scm_dir_free
);
1806 scm_set_smob_print (scm_tc16_dir
, scm_dir_print
);
1809 scm_c_define ("O_RDONLY", scm_from_int (O_RDONLY
));
1812 scm_c_define ("O_WRONLY", scm_from_int (O_WRONLY
));
1815 scm_c_define ("O_RDWR", scm_from_int (O_RDWR
));
1818 scm_c_define ("O_CREAT", scm_from_int (O_CREAT
));
1821 scm_c_define ("O_EXCL", scm_from_int (O_EXCL
));
1824 scm_c_define ("O_NOCTTY", scm_from_int (O_NOCTTY
));
1827 scm_c_define ("O_TRUNC", scm_from_int (O_TRUNC
));
1830 scm_c_define ("O_APPEND", scm_from_int (O_APPEND
));
1833 scm_c_define ("O_NONBLOCK", scm_from_int (O_NONBLOCK
));
1836 scm_c_define ("O_NDELAY", scm_from_int (O_NDELAY
));
1839 scm_c_define ("O_SYNC", scm_from_int (O_SYNC
));
1842 scm_c_define ("O_LARGEFILE", scm_from_int (O_LARGEFILE
));
1845 scm_c_define ("O_NOTRANS", scm_from_int (O_NOTRANS
));
1849 scm_c_define ("F_DUPFD", scm_from_int (F_DUPFD
));
1852 scm_c_define ("F_GETFD", scm_from_int (F_GETFD
));
1855 scm_c_define ("F_SETFD", scm_from_int (F_SETFD
));
1858 scm_c_define ("F_GETFL", scm_from_int (F_GETFL
));
1861 scm_c_define ("F_SETFL", scm_from_int (F_SETFL
));
1864 scm_c_define ("F_GETOWN", scm_from_int (F_GETOWN
));
1867 scm_c_define ("F_SETOWN", scm_from_int (F_SETOWN
));
1870 scm_c_define ("FD_CLOEXEC", scm_from_int (FD_CLOEXEC
));
1872 #endif /* HAVE_POSIX */
1874 /* `access' symbols. */
1875 scm_c_define ("R_OK", scm_from_int (R_OK
));
1876 scm_c_define ("W_OK", scm_from_int (W_OK
));
1877 scm_c_define ("X_OK", scm_from_int (X_OK
));
1878 scm_c_define ("F_OK", scm_from_int (F_OK
));
1880 scm_dot_string
= scm_from_locale_string (".");
1882 #include "libguile/filesys.x"