1 /* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2006,
2 * 2009, 2010, 2011, 2012, 2013, 2014 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/strings.h"
49 #include "libguile/vectors.h"
50 #include "libguile/dynwind.h"
52 #include "libguile/validate.h"
53 #include "libguile/filesys.h"
64 #ifdef TIME_WITH_SYS_TIME
65 # include <sys/time.h>
69 # include <sys/time.h>
77 #ifdef LIBC_H_WITH_UNISTD_H
81 #include <sys/select.h>
87 #include <sys/types.h>
97 #define NAMLEN(dirent) strlen ((dirent)->d_name)
99 #ifdef HAVE_SYS_SENDFILE_H
100 # include <sys/sendfile.h>
103 /* Glibc's `sendfile' function. */
104 #define sendfile_or_sendfile64 \
105 CHOOSE_LARGEFILE (sendfile, sendfile64)
107 #include <full-read.h>
108 #include <full-write.h>
113 /* Two helper macros for an often used pattern */
115 #define STRING_SYSCALL(str,cstr,code) \
118 char *cstr = scm_to_locale_string (str); \
119 SCM_SYSCALL (code); \
120 eno = errno; free (cstr); errno = eno; \
123 #define STRING2_SYSCALL(str1,cstr1,str2,cstr2,code) \
126 char *cstr1, *cstr2; \
127 scm_dynwind_begin (0); \
128 cstr1 = scm_to_locale_string (str1); \
129 scm_dynwind_free (cstr1); \
130 cstr2 = scm_to_locale_string (str2); \
131 scm_dynwind_free (cstr2); \
132 SCM_SYSCALL (code); \
133 eno = errno; scm_dynwind_end (); errno = eno; \
144 SCM_DEFINE (scm_chown
, "chown", 3, 0, 0,
145 (SCM object
, SCM owner
, SCM group
),
146 "Change the ownership and group of the file referred to by @var{object} to\n"
147 "the integer values @var{owner} and @var{group}. @var{object} can be\n"
148 "a string containing a file name or, if the platform\n"
149 "supports fchown, a port or integer file descriptor\n"
150 "which is open on the file. The return value\n"
151 "is unspecified.\n\n"
152 "If @var{object} is a symbolic link, either the\n"
153 "ownership of the link or the ownership of the referenced file will be\n"
154 "changed depending on the operating system (lchown is\n"
155 "unsupported at present). If @var{owner} or @var{group} is specified\n"
156 "as @code{-1}, then that ID is not changed.")
157 #define FUNC_NAME s_scm_chown
161 object
= SCM_COERCE_OUTPORT (object
);
164 if (scm_is_integer (object
) || (SCM_OPFPORTP (object
)))
166 int fdes
= (SCM_OPFPORTP (object
)?
167 SCM_FPORT_FDES (object
) : scm_to_int (object
));
169 SCM_SYSCALL (rv
= fchown (fdes
, scm_to_int (owner
), scm_to_int (group
)));
174 STRING_SYSCALL (object
, c_object
,
175 rv
= chown (c_object
,
176 scm_to_int (owner
), scm_to_int (group
)));
180 return SCM_UNSPECIFIED
;
183 #endif /* HAVE_CHOWN */
187 SCM_DEFINE (scm_open_fdes
, "open-fdes", 2, 1, 0,
188 (SCM path
, SCM flags
, SCM mode
),
189 "Similar to @code{open} but return a file descriptor instead of\n"
191 #define FUNC_NAME s_scm_open_fdes
197 iflags
= SCM_NUM2INT (2, flags
);
198 imode
= SCM_NUM2INT_DEF (3, mode
, 0666);
199 STRING_SYSCALL (path
, c_path
, fd
= open_or_open64 (c_path
, iflags
, imode
));
202 return scm_from_int (fd
);
206 SCM_DEFINE (scm_open
, "open", 2, 1, 0,
207 (SCM path
, SCM flags
, SCM mode
),
208 "Open the file named by @var{path} for reading and/or writing.\n"
209 "@var{flags} is an integer specifying how the file should be opened.\n"
210 "@var{mode} is an integer specifying the permission bits of the file, if\n"
211 "it needs to be created, before the umask is applied. The default is 666\n"
212 "(Unix itself has no default).\n\n"
213 "@var{flags} can be constructed by combining variables using @code{logior}.\n"
214 "Basic flags are:\n\n"
216 "Open the file read-only.\n"
219 "Open the file write-only.\n"
222 "Open the file read/write.\n"
225 "Append to the file instead of truncating.\n"
228 "Create the file if it does not already exist.\n"
230 "See the Unix documentation of the @code{open} system call\n"
231 "for additional flags.")
232 #define FUNC_NAME s_scm_open
239 fd
= scm_to_int (scm_open_fdes (path
, flags
, mode
));
240 iflags
= SCM_NUM2INT (2, flags
);
242 if ((iflags
& O_RDWR
) == O_RDWR
)
244 /* Opened read-write. */
245 if (iflags
& O_APPEND
)
247 else if (iflags
& O_CREAT
)
254 /* Opened read-only or write-only. */
255 if (iflags
& O_APPEND
)
257 else if (iflags
& O_WRONLY
)
263 newpt
= scm_fdes_to_port (fd
, port_mode
, path
);
268 SCM_DEFINE (scm_close
, "close", 1, 0, 0,
270 "Similar to close-port (@pxref{Closing, close-port}),\n"
271 "but also works on file descriptors. A side\n"
272 "effect of closing a file descriptor is that any ports using that file\n"
273 "descriptor are moved to a different file descriptor and have\n"
274 "their revealed counts set to zero.")
275 #define FUNC_NAME s_scm_close
280 fd_or_port
= SCM_COERCE_OUTPORT (fd_or_port
);
282 if (SCM_PORTP (fd_or_port
))
283 return scm_close_port (fd_or_port
);
284 fd
= scm_to_int (fd_or_port
);
285 scm_evict_ports (fd
); /* see scsh manual. */
286 SCM_SYSCALL (rv
= close (fd
));
287 /* following scsh, closing an already closed file descriptor is
289 if (rv
< 0 && errno
!= EBADF
)
291 return scm_from_bool (rv
>= 0);
295 SCM_DEFINE (scm_close_fdes
, "close-fdes", 1, 0, 0,
297 "A simple wrapper for the @code{close} system call.\n"
298 "Close file descriptor @var{fd}, which must be an integer.\n"
299 "Unlike close (@pxref{Ports and File Descriptors, close}),\n"
300 "the file descriptor will be closed even if a port is using it.\n"
301 "The return value is unspecified.")
302 #define FUNC_NAME s_scm_close_fdes
307 c_fd
= scm_to_int (fd
);
308 SCM_SYSCALL (rv
= close (c_fd
));
311 return SCM_UNSPECIFIED
;
315 #endif /* HAVE_POSIX */
321 SCM_SYMBOL (scm_sym_regular
, "regular");
322 SCM_SYMBOL (scm_sym_directory
, "directory");
324 SCM_SYMBOL (scm_sym_symlink
, "symlink");
326 SCM_SYMBOL (scm_sym_block_special
, "block-special");
327 SCM_SYMBOL (scm_sym_char_special
, "char-special");
328 SCM_SYMBOL (scm_sym_fifo
, "fifo");
329 SCM_SYMBOL (scm_sym_sock
, "socket");
330 SCM_SYMBOL (scm_sym_unknown
, "unknown");
333 scm_stat2scm (struct stat_or_stat64
*stat_temp
)
335 SCM ans
= scm_c_make_vector (18, SCM_UNSPECIFIED
);
337 SCM_SIMPLE_VECTOR_SET(ans
, 0, scm_from_ulong (stat_temp
->st_dev
));
338 SCM_SIMPLE_VECTOR_SET(ans
, 1, scm_from_ino_t_or_ino64_t (stat_temp
->st_ino
));
339 SCM_SIMPLE_VECTOR_SET(ans
, 2, scm_from_ulong (stat_temp
->st_mode
));
340 SCM_SIMPLE_VECTOR_SET(ans
, 3, scm_from_ulong (stat_temp
->st_nlink
));
341 SCM_SIMPLE_VECTOR_SET(ans
, 4, scm_from_ulong (stat_temp
->st_uid
));
342 SCM_SIMPLE_VECTOR_SET(ans
, 5, scm_from_ulong (stat_temp
->st_gid
));
343 #ifdef HAVE_STRUCT_STAT_ST_RDEV
344 SCM_SIMPLE_VECTOR_SET(ans
, 6, scm_from_ulong (stat_temp
->st_rdev
));
346 SCM_SIMPLE_VECTOR_SET(ans
, 6, SCM_BOOL_F
);
348 SCM_SIMPLE_VECTOR_SET(ans
, 7, scm_from_off_t_or_off64_t (stat_temp
->st_size
));
349 SCM_SIMPLE_VECTOR_SET(ans
, 8, scm_from_ulong (stat_temp
->st_atime
));
350 SCM_SIMPLE_VECTOR_SET(ans
, 9, scm_from_ulong (stat_temp
->st_mtime
));
351 SCM_SIMPLE_VECTOR_SET(ans
, 10, scm_from_ulong (stat_temp
->st_ctime
));
352 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
353 SCM_SIMPLE_VECTOR_SET(ans
, 11, scm_from_ulong (stat_temp
->st_blksize
));
355 SCM_SIMPLE_VECTOR_SET(ans
, 11, scm_from_ulong (4096L));
357 #ifdef HAVE_STRUCT_STAT_ST_BLOCKS
358 SCM_SIMPLE_VECTOR_SET(ans
, 12, scm_from_blkcnt_t_or_blkcnt64_t (stat_temp
->st_blocks
));
360 SCM_SIMPLE_VECTOR_SET(ans
, 12, SCM_BOOL_F
);
363 int mode
= stat_temp
->st_mode
;
366 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_regular
);
367 else if (S_ISDIR (mode
))
368 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_directory
);
370 /* systems without symlinks probably don't have S_ISLNK */
371 else if (S_ISLNK (mode
))
372 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_symlink
);
374 else if (S_ISBLK (mode
))
375 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_block_special
);
376 else if (S_ISCHR (mode
))
377 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_char_special
);
378 else if (S_ISFIFO (mode
))
379 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_fifo
);
381 else if (S_ISSOCK (mode
))
382 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_sock
);
385 SCM_SIMPLE_VECTOR_SET(ans
, 13, scm_sym_unknown
);
387 SCM_SIMPLE_VECTOR_SET(ans
, 14, scm_from_int ((~S_IFMT
) & mode
));
389 /* the layout of the bits in ve[14] is intended to be portable.
390 If there are systems that don't follow the usual convention,
391 the following could be used:
394 if (S_ISUID & mode) tmp += 1;
396 if (S_IRGRP & mode) tmp += 1;
398 if (S_ISVTX & mode) tmp += 1;
400 if (S_IRUSR & mode) tmp += 1;
402 if (S_IWUSR & mode) tmp += 1;
404 if (S_IXUSR & mode) tmp += 1;
406 if (S_IWGRP & mode) tmp += 1;
408 if (S_IXGRP & mode) tmp += 1;
410 if (S_IROTH & mode) tmp += 1;
412 if (S_IWOTH & mode) tmp += 1;
414 if (S_IXOTH & mode) tmp += 1;
416 SCM_SIMPLE_VECTOR_SET(ans, 14, scm_from_int (tmp));
420 #ifdef HAVE_STRUCT_STAT_ST_ATIM
421 SCM_SIMPLE_VECTOR_SET(ans
, 15, scm_from_long (stat_temp
->st_atim
.tv_nsec
));
423 SCM_SIMPLE_VECTOR_SET(ans
, 15, SCM_I_MAKINUM (0));
425 #ifdef HAVE_STRUCT_STAT_ST_MTIM
426 SCM_SIMPLE_VECTOR_SET(ans
, 16, scm_from_long (stat_temp
->st_mtim
.tv_nsec
));
428 SCM_SIMPLE_VECTOR_SET(ans
, 16, SCM_I_MAKINUM (0));
430 #ifdef HAVE_STRUCT_STAT_ST_CTIM
431 SCM_SIMPLE_VECTOR_SET(ans
, 17, scm_from_ulong (stat_temp
->st_ctim
.tv_sec
));
433 SCM_SIMPLE_VECTOR_SET(ans
, 17, SCM_I_MAKINUM (0));
440 is_file_name_separator (SCM c
)
442 if (scm_is_eq (c
, SCM_MAKE_CHAR ('/')))
445 if (scm_is_eq (c
, SCM_MAKE_CHAR ('\\')))
451 SCM_DEFINE (scm_stat
, "stat", 1, 1, 0,
452 (SCM object
, SCM exception_on_error
),
453 "Return an object containing various information about the file\n"
454 "determined by @var{object}. @var{object} can be a string containing\n"
455 "a file name or a port or integer file descriptor which is open\n"
456 "on a file (in which case @code{fstat} is used as the underlying\n"
459 "If the optional @var{exception_on_error} argument is true, which\n"
460 "is the default, an exception will be raised if the underlying\n"
461 "system call returns an error, for example if the file is not\n"
462 "found or is not readable. Otherwise, an error will cause\n"
463 "@code{stat} to return @code{#f}."
465 "The object returned by a successful call to @code{stat} can be\n"
466 "passed as a single parameter to the following procedures, all of\n"
467 "which return integers:\n"
471 "The device containing the file.\n"
473 "The file serial number, which distinguishes this file from all\n"
474 "other files on the same device.\n"
476 "The mode of the file. This includes file type information and\n"
477 "the file permission bits. See @code{stat:type} and\n"
478 "@code{stat:perms} below.\n"
480 "The number of hard links to the file.\n"
482 "The user ID of the file's owner.\n"
484 "The group ID of the file.\n"
486 "Device ID; this entry is defined only for character or block\n"
489 "The size of a regular file in bytes.\n"
491 "The last access time for the file.\n"
493 "The last modification time for the file.\n"
495 "The last modification time for the attributes of the file.\n"
496 "@item stat:blksize\n"
497 "The optimal block size for reading or writing the file, in\n"
499 "@item stat:blocks\n"
500 "The amount of disk space that the file occupies measured in\n"
501 "units of 512 byte blocks.\n"
504 "In addition, the following procedures return the information\n"
505 "from stat:mode in a more convenient form:\n"
509 "A symbol representing the type of file. Possible values are\n"
510 "regular, directory, symlink, block-special, char-special, fifo,\n"
511 "socket and unknown\n"
513 "An integer representing the access permission bits.\n"
515 #define FUNC_NAME s_scm_stat
519 struct stat_or_stat64 stat_temp
;
521 if (scm_is_integer (object
))
523 SCM_SYSCALL (rv
= fstat_or_fstat64 (scm_to_int (object
), &stat_temp
));
525 else if (scm_is_string (object
))
527 char *file
= scm_to_locale_string (object
);
528 SCM_SYSCALL (rv
= stat_or_stat64 (file
, &stat_temp
));
533 object
= SCM_COERCE_OUTPORT (object
);
534 SCM_VALIDATE_OPFPORT (1, object
);
535 fdes
= SCM_FPORT_FDES (object
);
536 SCM_SYSCALL (rv
= fstat_or_fstat64 (fdes
, &stat_temp
));
541 if (SCM_UNBNDP (exception_on_error
) || scm_is_true (exception_on_error
))
544 SCM_SYSERROR_MSG ("~A: ~S",
545 scm_list_2 (scm_strerror (scm_from_int (en
)),
552 return scm_stat2scm (&stat_temp
);
556 SCM_DEFINE (scm_lstat
, "lstat", 1, 0, 0,
558 "Similar to @code{stat}, but does not follow symbolic links, i.e.,\n"
559 "it will return information about a symbolic link itself, not the\n"
560 "file it points to. @var{str} must be a string.")
561 #define FUNC_NAME s_scm_lstat
564 struct stat_or_stat64 stat_temp
;
566 STRING_SYSCALL (str
, c_str
, rv
= lstat_or_lstat64 (c_str
, &stat_temp
));
571 SCM_SYSERROR_MSG ("~A: ~S",
572 scm_list_2 (scm_strerror (scm_from_int (en
)), str
),
575 return scm_stat2scm (&stat_temp
);
582 /* {Modifying Directories}
585 SCM_DEFINE (scm_link
, "link", 2, 0, 0,
586 (SCM oldpath
, SCM newpath
),
587 "Creates a new name @var{newpath} in the file system for the\n"
588 "file named by @var{oldpath}. If @var{oldpath} is a symbolic\n"
589 "link, the link may or may not be followed depending on the\n"
591 #define FUNC_NAME s_scm_link
595 STRING2_SYSCALL (oldpath
, c_oldpath
,
597 val
= link (c_oldpath
, c_newpath
));
600 return SCM_UNSPECIFIED
;
605 /* {Navigating Directories}
609 SCM_DEFINE (scm_chdir
, "chdir", 1, 0, 0,
611 "Change the current working directory to @var{str}.\n"
612 "The return value is unspecified.")
613 #define FUNC_NAME s_scm_chdir
617 STRING_SYSCALL (str
, c_str
, ans
= chdir (c_str
));
620 return SCM_UNSPECIFIED
;
626 /* check that element is a port or file descriptor. if it's a port
627 and its buffer is ready for use, add it to the ports_ready list.
628 otherwise add its file descriptor to *set. the type of list can be
629 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
630 SCM_ARG3 for excepts. */
632 set_element (fd_set
*set
, SCM
*ports_ready
, SCM element
, int pos
)
636 if (scm_is_integer (element
))
638 fd
= scm_to_int (element
);
644 element
= SCM_COERCE_OUTPORT (element
);
645 SCM_ASSERT (SCM_OPFPORTP (element
), element
, pos
, "select");
648 /* check whether port has buffered input. */
649 scm_t_port
*pt
= SCM_PTAB_ENTRY (element
);
651 if (pt
->read_pos
< pt
->read_end
)
654 else if (pos
== SCM_ARG2
)
656 /* check whether port's output buffer has room. */
657 scm_t_port
*pt
= SCM_PTAB_ENTRY (element
);
659 /* > 1 since writing the last byte in the buffer causes flush. */
660 if (pt
->write_end
- pt
->write_pos
> 1)
663 fd
= use_buf
? -1 : SCM_FPORT_FDES (element
);
666 *ports_ready
= scm_cons (element
, *ports_ready
);
672 /* check list_or_vec, a list or vector of ports or file descriptors,
673 adding each member to either the ports_ready list (if it's a port
674 with a usable buffer) or to *set. the kind of list_or_vec can be
675 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
676 SCM_ARG3 for excepts. */
678 fill_select_type (fd_set
*set
, SCM
*ports_ready
, SCM list_or_vec
, int pos
)
682 if (scm_is_simple_vector (list_or_vec
))
684 int i
= SCM_SIMPLE_VECTOR_LENGTH (list_or_vec
);
688 int fd
= set_element (set
, ports_ready
,
689 SCM_SIMPLE_VECTOR_REF (list_or_vec
, i
), pos
);
697 while (!SCM_NULL_OR_NIL_P (list_or_vec
))
699 int fd
= set_element (set
, ports_ready
, SCM_CAR (list_or_vec
), pos
);
703 list_or_vec
= SCM_CDR (list_or_vec
);
710 /* if element (a file descriptor or port) appears in *set, cons it to
711 list. return list. */
713 get_element (fd_set
*set
, SCM element
, SCM list
)
717 if (scm_is_integer (element
))
719 fd
= scm_to_int (element
);
723 fd
= SCM_FPORT_FDES (SCM_COERCE_OUTPORT (element
));
725 if (FD_ISSET (fd
, set
))
726 list
= scm_cons (element
, list
);
730 /* construct component of scm_select return value.
731 set: pointer to set of file descriptors found by select to be ready
732 ports_ready: ports ready due to buffering
733 list_or_vec: original list/vector handed to scm_select.
734 the return value is a list/vector of ready ports/file descriptors.
735 works by finding the objects in list which correspond to members of
736 *set and appending them to ports_ready. result is converted to a
737 vector if list_or_vec is a vector. */
739 retrieve_select_type (fd_set
*set
, SCM ports_ready
, SCM list_or_vec
)
741 SCM answer_list
= ports_ready
;
743 if (scm_is_simple_vector (list_or_vec
))
745 int i
= SCM_SIMPLE_VECTOR_LENGTH (list_or_vec
);
749 answer_list
= get_element (set
,
750 SCM_SIMPLE_VECTOR_REF (list_or_vec
, i
),
753 return scm_vector (answer_list
);
757 /* list_or_vec must be a list. */
758 while (!SCM_NULL_OR_NIL_P (list_or_vec
))
760 answer_list
= get_element (set
, SCM_CAR (list_or_vec
), answer_list
);
761 list_or_vec
= SCM_CDR (list_or_vec
);
767 /* Static helper functions above refer to s_scm_select directly as s_select */
768 SCM_DEFINE (scm_select
, "select", 3, 2, 0,
769 (SCM reads
, SCM writes
, SCM excepts
, SCM secs
, SCM usecs
),
770 "This procedure has a variety of uses: waiting for the ability\n"
771 "to provide input, accept output, or the existence of\n"
772 "exceptional conditions on a collection of ports or file\n"
773 "descriptors, or waiting for a timeout to occur.\n"
774 "It also returns if interrupted by a signal.\n\n"
775 "@var{reads}, @var{writes} and @var{excepts} can be lists or\n"
776 "vectors, with each member a port or a file descriptor.\n"
777 "The value returned is a list of three corresponding\n"
778 "lists or vectors containing only the members which meet the\n"
779 "specified requirement. The ability of port buffers to\n"
780 "provide input or accept output is taken into account.\n"
781 "Ordering of the input lists or vectors is not preserved.\n\n"
782 "The optional arguments @var{secs} and @var{usecs} specify the\n"
783 "timeout. Either @var{secs} can be specified alone, as\n"
784 "either an integer or a real number, or both @var{secs} and\n"
785 "@var{usecs} can be specified as integers, in which case\n"
786 "@var{usecs} is an additional timeout expressed in\n"
787 "microseconds. If @var{secs} is omitted or is @code{#f} then\n"
788 "select will wait for as long as it takes for one of the other\n"
789 "conditions to be satisfied.\n\n"
790 "The scsh version of @code{select} differs as follows:\n"
791 "Only vectors are accepted for the first three arguments.\n"
792 "The @var{usecs} argument is not supported.\n"
793 "Multiple values are returned instead of a list.\n"
794 "Duplicates in the input vectors appear only once in output.\n"
795 "An additional @code{select!} interface is provided.")
796 #define FUNC_NAME s_scm_select
798 struct timeval timeout
;
799 struct timeval
* time_ptr
;
806 /* these lists accumulate ports which are ready due to buffering.
807 their file descriptors don't need to be added to the select sets. */
808 SCM read_ports_ready
= SCM_EOL
;
809 SCM write_ports_ready
= SCM_EOL
;
812 if (scm_is_simple_vector (reads
))
814 read_count
= SCM_SIMPLE_VECTOR_LENGTH (reads
);
818 read_count
= scm_ilength (reads
);
819 SCM_ASSERT (read_count
>= 0, reads
, SCM_ARG1
, FUNC_NAME
);
821 if (scm_is_simple_vector (writes
))
823 write_count
= SCM_SIMPLE_VECTOR_LENGTH (writes
);
827 write_count
= scm_ilength (writes
);
828 SCM_ASSERT (write_count
>= 0, writes
, SCM_ARG2
, FUNC_NAME
);
830 if (scm_is_simple_vector (excepts
))
832 except_count
= SCM_SIMPLE_VECTOR_LENGTH (excepts
);
836 except_count
= scm_ilength (excepts
);
837 SCM_ASSERT (except_count
>= 0, excepts
, SCM_ARG3
, FUNC_NAME
);
841 FD_ZERO (&write_set
);
842 FD_ZERO (&except_set
);
844 max_fd
= fill_select_type (&read_set
, &read_ports_ready
, reads
, SCM_ARG1
);
847 int write_max
= fill_select_type (&write_set
, &write_ports_ready
,
849 int except_max
= fill_select_type (&except_set
, NULL
,
852 if (write_max
> max_fd
)
854 if (except_max
> max_fd
)
858 /* if there's a port with a ready buffer, don't block, just
859 check for ready file descriptors. */
860 if (!scm_is_null (read_ports_ready
) || !scm_is_null (write_ports_ready
))
866 else if (SCM_UNBNDP (secs
) || scm_is_false (secs
))
870 if (scm_is_unsigned_integer (secs
, 0, ULONG_MAX
))
872 timeout
.tv_sec
= scm_to_ulong (secs
);
873 if (SCM_UNBNDP (usecs
))
876 timeout
.tv_usec
= scm_to_long (usecs
);
880 double fl
= scm_to_double (secs
);
882 if (!SCM_UNBNDP (usecs
))
883 SCM_WRONG_TYPE_ARG (4, secs
);
885 SCM_OUT_OF_RANGE (4, secs
);
886 timeout
.tv_sec
= (long) fl
;
887 timeout
.tv_usec
= (long) ((fl
- timeout
.tv_sec
) * 1000000);
893 int rv
= select (max_fd
+ 1,
894 &read_set
, &write_set
, &except_set
,
899 return scm_list_3 (retrieve_select_type (&read_set
, read_ports_ready
, reads
),
900 retrieve_select_type (&write_set
, write_ports_ready
, writes
),
901 retrieve_select_type (&except_set
, SCM_EOL
, excepts
));
908 SCM_DEFINE (scm_fcntl
, "fcntl", 2, 1, 0,
909 (SCM object
, SCM cmd
, SCM value
),
910 "Apply @var{cmd} to the specified file descriptor or the underlying\n"
911 "file descriptor of the specified port. @var{value} is an optional\n"
912 "integer argument.\n\n"
913 "Values for @var{cmd} are:\n\n"
916 "Duplicate a file descriptor\n"
918 "Get flags associated with the file descriptor.\n"
920 "Set flags associated with the file descriptor to @var{value}.\n"
922 "Get flags associated with the open file.\n"
924 "Set flags associated with the open file to @var{value}\n"
926 "Get the process ID of a socket's owner, for @code{SIGIO} signals.\n"
928 "Set the process that owns a socket to @var{value}, for @code{SIGIO} signals.\n"
930 "The value used to indicate the \"close on exec\" flag with @code{F_GETFL} or\n"
933 #define FUNC_NAME s_scm_fcntl
939 object
= SCM_COERCE_OUTPORT (object
);
941 if (SCM_OPFPORTP (object
))
942 fdes
= SCM_FPORT_FDES (object
);
944 fdes
= scm_to_int (object
);
946 if (SCM_UNBNDP (value
))
949 ivalue
= scm_to_int (value
);
951 SCM_SYSCALL (rv
= fcntl (fdes
, scm_to_int (cmd
), ivalue
));
954 return scm_from_int (rv
);
957 #endif /* HAVE_FCNTL */
959 SCM_DEFINE (scm_fsync
, "fsync", 1, 0, 0,
961 "Copies any unwritten data for the specified output file\n"
962 "descriptor to disk. If @var{object} is a port, its buffer is\n"
963 "flushed before the underlying file descriptor is fsync'd.\n"
964 "The return value is unspecified.")
965 #define FUNC_NAME s_scm_fsync
969 object
= SCM_COERCE_OUTPORT (object
);
971 if (SCM_OPFPORTP (object
))
974 fdes
= SCM_FPORT_FDES (object
);
977 fdes
= scm_to_int (object
);
979 if (fsync (fdes
) == -1)
981 return SCM_UNSPECIFIED
;
986 SCM_DEFINE (scm_symlink
, "symlink", 2, 0, 0,
987 (SCM oldpath
, SCM newpath
),
988 "Create a symbolic link named @var{oldpath} with the value\n"
989 "(i.e., pointing to) @var{newpath}. The return value is\n"
991 #define FUNC_NAME s_scm_symlink
995 STRING2_SYSCALL (oldpath
, c_oldpath
,
997 val
= symlink (c_oldpath
, c_newpath
));
1000 return SCM_UNSPECIFIED
;
1003 #endif /* HAVE_SYMLINK */
1005 SCM_DEFINE (scm_readlink
, "readlink", 1, 0, 0,
1007 "Return the value of the symbolic link named by @var{path} (a\n"
1008 "string), i.e., the file that the link points to.")
1009 #define FUNC_NAME s_scm_readlink
1017 scm_dynwind_begin (0);
1019 c_path
= scm_to_locale_string (path
);
1020 scm_dynwind_free (c_path
);
1022 buf
= scm_malloc (size
);
1024 while ((rv
= readlink (c_path
, buf
, size
)) == size
)
1028 buf
= scm_malloc (size
);
1032 int save_errno
= errno
;
1037 result
= scm_take_locale_stringn (buf
, rv
);
1044 SCM_DEFINE (scm_copy_file
, "copy-file", 2, 0, 0,
1045 (SCM oldfile
, SCM newfile
),
1046 "Copy the file specified by @var{oldfile} to @var{newfile}.\n"
1047 "The return value is unspecified.")
1048 #define FUNC_NAME s_scm_copy_file
1050 char *c_oldfile
, *c_newfile
;
1054 struct stat_or_stat64 oldstat
;
1056 scm_dynwind_begin (0);
1058 c_oldfile
= scm_to_locale_string (oldfile
);
1059 scm_dynwind_free (c_oldfile
);
1060 c_newfile
= scm_to_locale_string (newfile
);
1061 scm_dynwind_free (c_newfile
);
1063 oldfd
= open_or_open64 (c_oldfile
, O_RDONLY
| O_BINARY
);
1067 SCM_SYSCALL (rv
= fstat_or_fstat64 (oldfd
, &oldstat
));
1069 goto err_close_oldfd
;
1071 /* use POSIX flags instead of 07777?. */
1072 newfd
= open_or_open64 (c_newfile
, O_WRONLY
| O_CREAT
| O_TRUNC
,
1073 oldstat
.st_mode
& 07777);
1081 while ((n
= read (oldfd
, buf
, sizeof buf
)) > 0)
1082 if (write (newfd
, buf
, n
) != n
)
1089 if (close (newfd
) == -1)
1093 return SCM_UNSPECIFIED
;
1097 SCM_DEFINE (scm_sendfile
, "sendfile", 3, 1, 0,
1098 (SCM out
, SCM in
, SCM count
, SCM offset
),
1099 "Send @var{count} bytes from @var{in} to @var{out}, both of which "
1100 "must be either open file ports or file descriptors. When "
1101 "@var{offset} is omitted, start reading from @var{in}'s current "
1102 "position; otherwise, start reading at @var{offset}. Return "
1103 "the number of bytes actually sent.")
1104 #define FUNC_NAME s_scm_sendfile
1106 #define VALIDATE_FD_OR_PORT(cvar, svar, pos) \
1107 if (scm_is_integer (svar)) \
1108 cvar = scm_to_int (svar); \
1111 SCM_VALIDATE_OPFPORT (pos, svar); \
1113 cvar = SCM_FPORT_FDES (svar); \
1116 ssize_t result SCM_UNUSED
;
1117 size_t c_count
, total
= 0;
1121 VALIDATE_FD_OR_PORT (out_fd
, out
, 1);
1122 VALIDATE_FD_OR_PORT (in_fd
, in
, 2);
1123 c_count
= scm_to_size_t (count
);
1124 c_offset
= SCM_UNBNDP (offset
) ? 0 : scm_to_off_t (offset
);
1126 #if defined HAVE_SYS_SENDFILE_H && defined HAVE_SENDFILE
1127 /* The Linux-style sendfile(2), which is different from the BSD-style. */
1132 offset_ptr
= SCM_UNBNDP (offset
) ? NULL
: &c_offset
;
1134 /* On Linux, when OUT_FD is a file, everything is transferred at once and
1135 RESULT == C_COUNT. However, when OUT_FD is a pipe or other "slow"
1136 device, fewer bytes may be transferred, hence the loop. RESULT == 0
1137 means EOF on IN_FD, so leave the loop in that case. */
1140 result
= sendfile_or_sendfile64 (out_fd
, in_fd
, offset_ptr
,
1143 /* At this point, either OFFSET_PTR is non-NULL and it has been
1144 updated to the current offset in IN_FD, or it is NULL and IN_FD's
1145 offset has been updated. */
1147 else if (result
< 0 && (errno
== EINTR
|| errno
== EAGAIN
))
1151 while (total
< c_count
&& result
> 0);
1154 /* Quoting the Linux man page: "In Linux kernels before 2.6.33, out_fd
1155 must refer to a socket. Since Linux 2.6.33 it can be any file."
1156 Fall back to read(2) and write(2) when such an error occurs. */
1157 if (result
< 0 && errno
!= EINVAL
&& errno
!= ENOSYS
)
1159 else if (result
< 0)
1164 int reached_eof
= 0;
1166 if (!SCM_UNBNDP (offset
))
1169 scm_seek (in
, scm_from_off_t (c_offset
), scm_from_int (SEEK_SET
));
1172 if (lseek_or_lseek64 (in_fd
, c_offset
, SEEK_SET
) < 0)
1177 for (total
= 0, left
= c_count
; total
< c_count
&& !reached_eof
; )
1179 size_t asked
, obtained
, written
;
1181 asked
= SCM_MIN (sizeof buf
, left
);
1182 obtained
= full_read (in_fd
, buf
, asked
);
1183 if (obtained
< asked
)
1193 written
= full_write (out_fd
, buf
, obtained
);
1194 if (written
< obtained
)
1202 return scm_from_size_t (total
);
1204 #undef VALIDATE_FD_OR_PORT
1208 #endif /* HAVE_POSIX */
1211 /* Essential procedures used in (system base compile). */
1214 SCM_DEFINE (scm_getcwd
, "getcwd", 0, 0, 0,
1216 "Return the name of the current working directory.")
1217 #define FUNC_NAME s_scm_getcwd
1224 wd
= scm_malloc (size
);
1225 while ((rv
= getcwd (wd
, size
)) == 0 && errno
== ERANGE
)
1229 wd
= scm_malloc (size
);
1233 int save_errno
= errno
;
1238 result
= scm_from_locale_stringn (wd
, strlen (wd
));
1243 #endif /* HAVE_GETCWD */
1245 SCM_DEFINE (scm_mkdir
, "mkdir", 1, 1, 0,
1246 (SCM path
, SCM mode
),
1247 "Create a new directory named by @var{path}. If @var{mode} is omitted\n"
1248 "then the permissions of the directory file are set using the current\n"
1249 "umask. Otherwise they are set to the decimal value specified with\n"
1250 "@var{mode}. The return value is unspecified.")
1251 #define FUNC_NAME s_scm_mkdir
1256 if (SCM_UNBNDP (mode
))
1260 STRING_SYSCALL (path
, c_path
, rv
= mkdir (c_path
, 0777 ^ mask
));
1264 STRING_SYSCALL (path
, c_path
, rv
= mkdir (c_path
, scm_to_uint (mode
)));
1268 return SCM_UNSPECIFIED
;
1272 SCM_DEFINE (scm_rmdir
, "rmdir", 1, 0, 0,
1274 "Remove the existing directory named by @var{path}. The directory must\n"
1275 "be empty for this to succeed. The return value is unspecified.")
1276 #define FUNC_NAME s_scm_rmdir
1280 STRING_SYSCALL (path
, c_path
, val
= rmdir (c_path
));
1283 return SCM_UNSPECIFIED
;
1287 SCM_DEFINE (scm_rename
, "rename-file", 2, 0, 0,
1288 (SCM oldname
, SCM newname
),
1289 "Renames the file specified by @var{oldname} to @var{newname}.\n"
1290 "The return value is unspecified.")
1291 #define FUNC_NAME s_scm_rename
1295 STRING2_SYSCALL (oldname
, c_oldname
,
1297 rv
= rename (c_oldname
, c_newname
));
1300 return SCM_UNSPECIFIED
;
1305 SCM_DEFINE (scm_delete_file
, "delete-file", 1, 0, 0,
1307 "Deletes (or \"unlinks\") the file specified by @var{str}.")
1308 #define FUNC_NAME s_scm_delete_file
1311 STRING_SYSCALL (str
, c_str
, ans
= unlink (c_str
));
1314 return SCM_UNSPECIFIED
;
1318 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1319 (SCM path
, SCM how
),
1320 "Test accessibility of a file under the real UID and GID of the\n"
1321 "calling process. The return is @code{#t} if @var{path} exists\n"
1322 "and the permissions requested by @var{how} are all allowed, or\n"
1323 "@code{#f} if not.\n"
1325 "@var{how} is an integer which is one of the following values,\n"
1326 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1329 "Test for read permission.\n"
1332 "Test for write permission.\n"
1335 "Test for execute permission.\n"
1338 "Test for existence of the file. This is implied by each of the\n"
1339 "other tests, so there's no need to combine it with them.\n"
1342 "It's important to note that @code{access?} does not simply\n"
1343 "indicate what will happen on attempting to read or write a\n"
1344 "file. In normal circumstances it does, but in a set-UID or\n"
1345 "set-GID program it doesn't because @code{access?} tests the\n"
1346 "real ID, whereas an open or execute attempt uses the effective\n"
1349 "A program which will never run set-UID/GID can ignore the\n"
1350 "difference between real and effective IDs, but for maximum\n"
1351 "generality, especially in library functions, it's best not to\n"
1352 "use @code{access?} to predict the result of an open or execute,\n"
1353 "instead simply attempt that and catch any exception.\n"
1355 "The main use for @code{access?} is to let a set-UID/GID program\n"
1356 "determine what the invoking user would have been allowed to do,\n"
1357 "without the greater (or perhaps lesser) privileges afforded by\n"
1358 "the effective ID. For more on this, see ``Testing File\n"
1359 "Access'' in The GNU C Library Reference Manual.")
1360 #define FUNC_NAME s_scm_access
1365 c_path
= scm_to_locale_string (path
);
1366 rv
= access (c_path
, scm_to_int (how
));
1369 return scm_from_bool (!rv
);
1373 SCM_DEFINE (scm_chmod
, "chmod", 2, 0, 0,
1374 (SCM object
, SCM mode
),
1375 "Changes the permissions of the file referred to by\n"
1376 "@var{object}. @var{object} can be a string containing a file\n"
1377 "name or a port or integer file descriptor which is open on a\n"
1378 "file (in which case @code{fchmod} is used as the underlying\n"
1379 "system call). @var{mode} specifies the new permissions as a\n"
1380 "decimal number, e.g., @code{(chmod \"foo\" #o755)}.\n"
1381 "The return value is unspecified.")
1382 #define FUNC_NAME s_scm_chmod
1386 object
= SCM_COERCE_OUTPORT (object
);
1389 if (scm_is_integer (object
) || SCM_OPFPORTP (object
))
1392 if (scm_is_integer (object
))
1393 fdes
= scm_to_int (object
);
1395 fdes
= SCM_FPORT_FDES (object
);
1396 SCM_SYSCALL (rv
= fchmod (fdes
, scm_to_int (mode
)));
1401 STRING_SYSCALL (object
, c_object
,
1402 rv
= chmod (c_object
, scm_to_int (mode
)));
1406 return SCM_UNSPECIFIED
;
1410 SCM_DEFINE (scm_umask
, "umask", 0, 1, 0,
1412 "If @var{mode} is omitted, returns a decimal number representing the current\n"
1413 "file creation mask. Otherwise the file creation mask is set to\n"
1414 "@var{mode} and the previous value is returned.\n\n"
1415 "E.g., @code{(umask #o022)} sets the mask to octal 22, decimal 18.")
1416 #define FUNC_NAME s_scm_umask
1419 if (SCM_UNBNDP (mode
))
1426 mask
= umask (scm_to_uint (mode
));
1428 return scm_from_uint (mask
);
1432 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1434 "Create a new unique file in the file system and return a new\n"
1435 "buffered port open for reading and writing to the file.\n"
1437 "@var{tmpl} is a string specifying where the file should be\n"
1438 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1439 "will be changed in the string to return the name of the file.\n"
1440 "(@code{port-filename} on the port also gives the name.)\n"
1442 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1443 "and most systems it's @code{#o600}. An application can use\n"
1444 "@code{chmod} to relax that if desired. For example\n"
1445 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1449 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1450 " (chmod port (logand #o666 (lognot (umask))))\n"
1453 #define FUNC_NAME s_scm_mkstemp
1458 scm_dynwind_begin (0);
1460 c_tmpl
= scm_to_locale_string (tmpl
);
1461 scm_dynwind_free (c_tmpl
);
1463 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1467 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1468 SCM_INUM0
, scm_string_length (tmpl
),
1472 return scm_fdes_to_port (rv
, "w+", tmpl
);
1477 /* Filename manipulation */
1482 SCM_SYMBOL (sym_file_name_convention
, "windows");
1484 SCM_SYMBOL (sym_file_name_convention
, "posix");
1487 SCM_INTERNAL SCM
scm_system_file_name_convention (void);
1489 SCM_DEFINE (scm_system_file_name_convention
,
1490 "system-file-name-convention", 0, 0, 0, (void),
1491 "Return either @code{posix} or @code{windows}, depending on\n"
1492 "what kind of system this Guile is running on.")
1493 #define FUNC_NAME s_scm_system_file_name_convention
1495 return sym_file_name_convention
;
1499 SCM_DEFINE (scm_dirname
, "dirname", 1, 0, 0,
1501 "Return the directory name component of the file name\n"
1502 "@var{filename}. If @var{filename} does not contain a directory\n"
1503 "component, @code{.} is returned.")
1504 #define FUNC_NAME s_scm_dirname
1507 unsigned long int len
;
1509 SCM_VALIDATE_STRING (1, filename
);
1511 len
= scm_i_string_length (filename
);
1515 while (i
>= 0 && is_file_name_separator (scm_c_string_ref (filename
, i
)))
1517 while (i
>= 0 && !is_file_name_separator (scm_c_string_ref (filename
, i
)))
1519 while (i
>= 0 && is_file_name_separator (scm_c_string_ref (filename
, i
)))
1524 if (len
> 0 && is_file_name_separator (scm_c_string_ref (filename
, 0)))
1525 return scm_c_substring (filename
, 0, 1);
1527 return scm_dot_string
;
1530 return scm_c_substring (filename
, 0, i
+ 1);
1534 SCM_DEFINE (scm_basename
, "basename", 1, 1, 0,
1535 (SCM filename
, SCM suffix
),
1536 "Return the base name of the file name @var{filename}. The\n"
1537 "base name is the file name without any directory components.\n"
1538 "If @var{suffix} is provided, and is equal to the end of\n"
1539 "@var{filename}, it is removed also.")
1540 #define FUNC_NAME s_scm_basename
1544 SCM_VALIDATE_STRING (1, filename
);
1545 len
= scm_i_string_length (filename
);
1547 if (SCM_UNBNDP (suffix
))
1551 SCM_VALIDATE_STRING (2, suffix
);
1552 j
= scm_i_string_length (suffix
) - 1;
1555 while (i
>= 0 && is_file_name_separator (scm_c_string_ref (filename
, i
)))
1558 while (i
>= 0 && j
>= 0
1559 && (scm_i_string_ref (filename
, i
)
1560 == scm_i_string_ref (suffix
, j
)))
1567 while (i
>= 0 && !is_file_name_separator (scm_c_string_ref (filename
, i
)))
1571 if (len
> 0 && is_file_name_separator (scm_c_string_ref (filename
, 0)))
1572 return scm_c_substring (filename
, 0, 1);
1574 return scm_dot_string
;
1577 return scm_c_substring (filename
, i
+1, end
+1);
1581 SCM_DEFINE (scm_canonicalize_path
, "canonicalize-path", 1, 0, 0,
1583 "Return the canonical path of @var{path}. A canonical path has\n"
1584 "no @code{.} or @code{..} components, nor any repeated path\n"
1585 "separators (@code{/}) nor symlinks.\n\n"
1586 "Raises an error if any component of @var{path} does not exist.")
1587 #define FUNC_NAME s_scm_canonicalize_path
1591 SCM_VALIDATE_STRING (1, path
);
1593 str
= scm_to_locale_string (path
);
1594 canon
= canonicalize_file_name (str
);
1598 return scm_take_locale_string (canon
);
1605 scm_i_relativize_path (SCM path
, SCM in_path
)
1610 str
= scm_to_locale_string (path
);
1611 canon
= canonicalize_file_name (str
);
1617 scanon
= scm_take_locale_string (canon
);
1619 for (; scm_is_pair (in_path
); in_path
= scm_cdr (in_path
))
1621 SCM dir
= scm_car (in_path
);
1622 size_t len
= scm_c_string_length (dir
);
1624 /* When DIR is empty, it means "current working directory". We
1625 could set DIR to (getcwd) in that case, but then the
1626 canonicalization would depend on the current directory, which
1627 is not what we want in the context of `compile-file', for
1630 && scm_is_true (scm_string_prefix_p (dir
, scanon
,
1631 SCM_UNDEFINED
, SCM_UNDEFINED
,
1632 SCM_UNDEFINED
, SCM_UNDEFINED
)))
1634 /* DIR either has a trailing delimiter or doesn't. SCANON
1635 will be delimited by single delimiters. When DIR does not
1636 have a trailing delimiter, add one to the length to strip
1637 off the delimiter within SCANON. */
1638 if (!is_file_name_separator (scm_c_string_ref (dir
, len
- 1)))
1641 if (scm_c_string_length (scanon
) > len
)
1642 return scm_substring (scanon
, scm_from_size_t (len
), SCM_UNDEFINED
);
1652 /* Examining directories. These procedures are used by `check-guile'
1653 and thus compiled unconditionally. */
1655 scm_t_bits scm_tc16_dir
;
1658 SCM_DEFINE (scm_directory_stream_p
, "directory-stream?", 1, 0, 0,
1660 "Return a boolean indicating whether @var{obj} is a directory\n"
1661 "stream as returned by @code{opendir}.")
1662 #define FUNC_NAME s_scm_directory_stream_p
1664 return scm_from_bool (SCM_DIRP (obj
));
1669 SCM_DEFINE (scm_opendir
, "opendir", 1, 0, 0,
1671 "Open the directory specified by @var{dirname} and return a directory\n"
1673 #define FUNC_NAME s_scm_opendir
1676 STRING_SYSCALL (dirname
, c_dirname
, ds
= opendir (c_dirname
));
1679 SCM_RETURN_NEWSMOB (scm_tc16_dir
| (SCM_DIR_FLAG_OPEN
<<16), ds
);
1684 /* FIXME: The glibc manual has a portability note that readdir_r may not
1685 null-terminate its return string. The circumstances outlined for this
1686 are not clear, nor is it clear what should be done about it. Lets use
1687 NAMLEN and worry about what else should be done if/when someone can
1690 SCM_DEFINE (scm_readdir
, "readdir", 1, 0, 0,
1692 "Return (as a string) the next directory entry from the directory stream\n"
1693 "@var{port}. If there is no remaining entry to be read then the\n"
1694 "end of file object is returned.")
1695 #define FUNC_NAME s_scm_readdir
1697 struct dirent_or_dirent64
*rdent
;
1699 SCM_VALIDATE_DIR (1, port
);
1700 if (!SCM_DIR_OPEN_P (port
))
1701 SCM_MISC_ERROR ("Directory ~S is not open.", scm_list_1 (port
));
1704 /* As noted in the glibc manual, on various systems (such as Solaris) the
1705 d_name[] field is only 1 char and you're expected to size the dirent
1706 buffer for readdir_r based on NAME_MAX. The SCM_MAX expressions below
1707 effectively give either sizeof(d_name) or NAME_MAX+1, whichever is
1710 On solaris 10 there's no NAME_MAX constant, it's necessary to use
1711 pathconf(). We prefer NAME_MAX though, since it should be a constant
1712 and will therefore save a system call. We also prefer it since dirfd()
1713 is not available everywhere.
1715 An alternative to dirfd() would be to open() the directory and then use
1716 fdopendir(), if the latter is available. That'd let us hold the fd
1717 somewhere in the smob, or just the dirent size calculated once. */
1719 struct dirent_or_dirent64 de
; /* just for sizeof */
1720 DIR *ds
= (DIR *) SCM_SMOB_DATA_1 (port
);
1722 char buf
[SCM_MAX (sizeof (de
),
1723 sizeof (de
) - sizeof (de
.d_name
) + NAME_MAX
+ 1)];
1726 long name_max
= fpathconf (dirfd (ds
), _PC_NAME_MAX
);
1729 buf
= alloca (SCM_MAX (sizeof (de
),
1730 sizeof (de
) - sizeof (de
.d_name
) + name_max
+ 1));
1734 SCM_SYSCALL (readdir_r_or_readdir64_r (ds
, (struct dirent_or_dirent64
*) buf
, &rdent
));
1740 return (rdent
? scm_from_locale_stringn (rdent
->d_name
, NAMLEN (rdent
))
1746 scm_dynwind_begin (0);
1747 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1750 SCM_SYSCALL (rdent
= readdir_or_readdir64 ((DIR *) SCM_SMOB_DATA_1 (port
)));
1754 ret
= (rdent
? scm_from_locale_stringn (rdent
->d_name
, NAMLEN (rdent
))
1765 SCM_DEFINE (scm_rewinddir
, "rewinddir", 1, 0, 0,
1767 "Reset the directory port @var{port} so that the next call to\n"
1768 "@code{readdir} will return the first directory entry.")
1769 #define FUNC_NAME s_scm_rewinddir
1771 SCM_VALIDATE_DIR (1, port
);
1772 if (!SCM_DIR_OPEN_P (port
))
1773 SCM_MISC_ERROR ("Directory ~S is not open.", scm_list_1 (port
));
1775 rewinddir ((DIR *) SCM_SMOB_DATA_1 (port
));
1777 return SCM_UNSPECIFIED
;
1782 SCM_DEFINE (scm_closedir
, "closedir", 1, 0, 0,
1784 "Close the directory stream @var{port}.\n"
1785 "The return value is unspecified.")
1786 #define FUNC_NAME s_scm_closedir
1788 SCM_VALIDATE_DIR (1, port
);
1790 if (SCM_DIR_OPEN_P (port
))
1794 SCM_SYSCALL (sts
= closedir ((DIR *) SCM_SMOB_DATA_1 (port
)));
1798 SCM_SET_SMOB_DATA_0 (port
, scm_tc16_dir
);
1801 return SCM_UNSPECIFIED
;
1808 scm_dir_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
1810 scm_puts ("#<", port
);
1811 if (!SCM_DIR_OPEN_P (exp
))
1812 scm_puts ("closed: ", port
);
1813 scm_puts ("directory stream ", port
);
1814 scm_uintprint (SCM_SMOB_DATA_1 (exp
), 16, port
);
1815 scm_putc ('>', port
);
1821 scm_dir_free (SCM p
)
1823 if (SCM_DIR_OPEN_P (p
))
1824 closedir ((DIR *) SCM_SMOB_DATA_1 (p
));
1835 scm_tc16_dir
= scm_make_smob_type ("directory", 0);
1836 scm_set_smob_free (scm_tc16_dir
, scm_dir_free
);
1837 scm_set_smob_print (scm_tc16_dir
, scm_dir_print
);
1840 scm_c_define ("O_RDONLY", scm_from_int (O_RDONLY
));
1843 scm_c_define ("O_WRONLY", scm_from_int (O_WRONLY
));
1846 scm_c_define ("O_RDWR", scm_from_int (O_RDWR
));
1849 scm_c_define ("O_CREAT", scm_from_int (O_CREAT
));
1852 scm_c_define ("O_EXCL", scm_from_int (O_EXCL
));
1855 scm_c_define ("O_NOCTTY", scm_from_int (O_NOCTTY
));
1858 scm_c_define ("O_TRUNC", scm_from_int (O_TRUNC
));
1861 scm_c_define ("O_APPEND", scm_from_int (O_APPEND
));
1864 scm_c_define ("O_NONBLOCK", scm_from_int (O_NONBLOCK
));
1867 scm_c_define ("O_NDELAY", scm_from_int (O_NDELAY
));
1870 scm_c_define ("O_SYNC", scm_from_int (O_SYNC
));
1873 scm_c_define ("O_LARGEFILE", scm_from_int (O_LARGEFILE
));
1876 scm_c_define ("O_NOTRANS", scm_from_int (O_NOTRANS
));
1880 scm_c_define ("F_DUPFD", scm_from_int (F_DUPFD
));
1883 scm_c_define ("F_GETFD", scm_from_int (F_GETFD
));
1886 scm_c_define ("F_SETFD", scm_from_int (F_SETFD
));
1889 scm_c_define ("F_GETFL", scm_from_int (F_GETFL
));
1892 scm_c_define ("F_SETFL", scm_from_int (F_SETFL
));
1895 scm_c_define ("F_GETOWN", scm_from_int (F_GETOWN
));
1898 scm_c_define ("F_SETOWN", scm_from_int (F_SETOWN
));
1901 scm_c_define ("FD_CLOEXEC", scm_from_int (FD_CLOEXEC
));
1903 #endif /* HAVE_POSIX */
1905 /* `access' symbols. */
1906 scm_c_define ("R_OK", scm_from_int (R_OK
));
1907 scm_c_define ("W_OK", scm_from_int (W_OK
));
1908 scm_c_define ("X_OK", scm_from_int (X_OK
));
1909 scm_c_define ("F_OK", scm_from_int (F_OK
));
1911 scm_dot_string
= scm_from_locale_string (".");
1913 #include "libguile/filesys.x"