1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public License
5 * as published by the Free Software Foundation; either version 3 of
6 * the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #define _LARGEFILE64_SOURCE /* ask for stat64 etc */
29 #include "libguile/_scm.h"
30 #include "libguile/strings.h"
31 #include "libguile/validate.h"
32 #include "libguile/gc.h"
33 #include "libguile/posix.h"
34 #include "libguile/dynwind.h"
35 #include "libguile/hashtab.h"
37 #include "libguile/fports.h"
48 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
53 #include <sys/types.h>
55 #include "libguile/iselect.h"
57 /* Some defines for Windows (native port, not Cygwin). */
59 # include <sys/stat.h>
60 # include <winsock2.h>
61 #endif /* __MINGW32__ */
63 #include <full-write.h>
65 /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize
66 already, but have this code here in case that wasn't so in past versions,
67 or perhaps to help other minimal DOS environments.
69 gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which
70 might be possibilities if we've got other systems without ftruncate. */
72 #if defined HAVE_CHSIZE && ! defined HAVE_FTRUNCATE
73 # define ftruncate(fd, size) chsize (fd, size)
74 # undef HAVE_FTRUNCATE
75 # define HAVE_FTRUNCATE 1
78 #if SIZEOF_OFF_T == SIZEOF_INT
79 #define OFF_T_MAX INT_MAX
80 #define OFF_T_MIN INT_MIN
81 #elif SIZEOF_OFF_T == SIZEOF_LONG
82 #define OFF_T_MAX LONG_MAX
83 #define OFF_T_MIN LONG_MIN
84 #elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
85 #define OFF_T_MAX LONG_LONG_MAX
86 #define OFF_T_MIN LONG_LONG_MIN
88 #error Oops, unknown OFF_T size
91 scm_t_bits scm_tc16_fport
;
94 /* default buffer size, used if the O/S won't supply a value. */
95 static const size_t default_buffer_size
= 1024;
97 /* create FPORT buffer with specified sizes (or -1 to use default size or
100 scm_fport_buffer_add (SCM port
, long read_size
, int write_size
)
101 #define FUNC_NAME "scm_fport_buffer_add"
103 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
105 if (read_size
== -1 || write_size
== -1)
108 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
110 scm_t_fport
*fp
= SCM_FSTREAM (port
);
112 default_size
= (fstat (fp
->fdes
, &st
) == -1) ? default_buffer_size
115 default_size
= default_buffer_size
;
118 read_size
= default_size
;
119 if (write_size
== -1)
120 write_size
= default_size
;
123 if (SCM_INPUT_PORT_P (port
) && read_size
> 0)
125 pt
->read_buf
= scm_gc_malloc_pointerless (read_size
, "port buffer");
126 pt
->read_pos
= pt
->read_end
= pt
->read_buf
;
127 pt
->read_buf_size
= read_size
;
131 pt
->read_pos
= pt
->read_buf
= pt
->read_end
= &pt
->shortbuf
;
132 pt
->read_buf_size
= 1;
135 if (SCM_OUTPUT_PORT_P (port
) && write_size
> 0)
137 pt
->write_buf
= scm_gc_malloc_pointerless (write_size
, "port buffer");
138 pt
->write_pos
= pt
->write_buf
;
139 pt
->write_buf_size
= write_size
;
143 pt
->write_buf
= pt
->write_pos
= &pt
->shortbuf
;
144 pt
->write_buf_size
= 1;
147 pt
->write_end
= pt
->write_buf
+ pt
->write_buf_size
;
148 if (read_size
> 0 || write_size
> 0)
149 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) & ~SCM_BUF0
);
151 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) | SCM_BUF0
);
155 SCM_DEFINE (scm_setvbuf
, "setvbuf", 2, 1, 0,
156 (SCM port
, SCM mode
, SCM size
),
157 "Set the buffering mode for @var{port}. @var{mode} can be:\n"
164 "block buffered, using a newly allocated buffer of @var{size} bytes.\n"
165 "If @var{size} is omitted, a default size will be used.\n"
167 #define FUNC_NAME s_scm_setvbuf
173 port
= SCM_COERCE_OUTPORT (port
);
175 SCM_VALIDATE_OPFPORT (1,port
);
176 cmode
= scm_to_int (mode
);
177 if (cmode
!= _IONBF
&& cmode
!= _IOFBF
&& cmode
!= _IOLBF
)
178 scm_out_of_range (FUNC_NAME
, mode
);
182 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) | SCM_BUFLINE
);
187 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) & ~(scm_t_bits
)SCM_BUFLINE
);
190 if (SCM_UNBNDP (size
))
199 csize
= scm_to_int (size
);
200 if (csize
< 0 || (cmode
== _IONBF
&& csize
> 0))
201 scm_out_of_range (FUNC_NAME
, size
);
204 pt
= SCM_PTAB_ENTRY (port
);
206 /* silently discards buffered and put-back chars. */
207 if (pt
->read_buf
== pt
->putback_buf
)
209 pt
->read_buf
= pt
->saved_read_buf
;
210 pt
->read_pos
= pt
->saved_read_pos
;
211 pt
->read_end
= pt
->saved_read_end
;
212 pt
->read_buf_size
= pt
->saved_read_buf_size
;
214 if (pt
->read_buf
!= &pt
->shortbuf
)
215 scm_gc_free (pt
->read_buf
, pt
->read_buf_size
, "port buffer");
216 if (pt
->write_buf
!= &pt
->shortbuf
)
217 scm_gc_free (pt
->write_buf
, pt
->write_buf_size
, "port buffer");
219 scm_fport_buffer_add (port
, csize
, csize
);
220 return SCM_UNSPECIFIED
;
224 /* Move ports with the specified file descriptor to new descriptors,
225 * resetting the revealed count to 0.
228 scm_i_evict_port (void *closure
, SCM port
)
230 int fd
= * (int*) closure
;
232 if (SCM_FPORTP (port
))
237 /* XXX: In some cases, we can encounter a port with no associated ptab
239 p
= SCM_PTAB_ENTRY (port
);
240 fp
= (p
!= NULL
) ? (scm_t_fport
*) p
->stream
: NULL
;
242 if ((fp
!= NULL
) && (fp
->fdes
== fd
))
246 scm_syserror ("scm_evict_ports");
247 scm_set_port_revealed_x (port
, scm_from_int (0));
253 scm_evict_ports (int fd
)
255 scm_c_port_for_each (scm_i_evict_port
, (void *) &fd
);
259 SCM_DEFINE (scm_file_port_p
, "file-port?", 1, 0, 0,
261 "Determine whether @var{obj} is a port that is related to a file.")
262 #define FUNC_NAME s_scm_file_port_p
264 return scm_from_bool (SCM_FPORTP (obj
));
269 static SCM sys_file_port_name_canonicalization
;
270 SCM_SYMBOL (sym_relative
, "relative");
271 SCM_SYMBOL (sym_absolute
, "absolute");
274 fport_canonicalize_filename (SCM filename
)
276 SCM mode
= scm_fluid_ref (sys_file_port_name_canonicalization
);
278 if (!scm_is_string (filename
))
282 else if (scm_is_eq (mode
, sym_relative
))
286 path
= scm_variable_ref (scm_c_module_lookup (scm_the_root_module (),
288 rel
= scm_i_relativize_path (filename
, path
);
290 return scm_is_true (rel
) ? rel
: filename
;
292 else if (scm_is_eq (mode
, sym_absolute
))
296 str
= scm_to_locale_string (filename
);
297 canon
= canonicalize_file_name (str
);
300 return canon
? scm_take_locale_string (canon
) : filename
;
310 * Return a new port open on a given file.
312 * The mode string must match the pattern: [rwa+]** which
313 * is interpreted in the usual unix way.
315 * Return the new port.
317 SCM_DEFINE (scm_open_file
, "open-file", 2, 0, 0,
318 (SCM filename
, SCM mode
),
319 "Open the file whose name is @var{filename}, and return a port\n"
320 "representing that file. The attributes of the port are\n"
321 "determined by the @var{mode} string. The way in which this is\n"
322 "interpreted is similar to C stdio. The first character must be\n"
323 "one of the following:\n"
326 "Open an existing file for input.\n"
328 "Open a file for output, creating it if it doesn't already exist\n"
329 "or removing its contents if it does.\n"
331 "Open a file for output, creating it if it doesn't already\n"
332 "exist. All writes to the port will go to the end of the file.\n"
333 "The \"append mode\" can be turned off while the port is in use\n"
334 "@pxref{Ports and File Descriptors, fcntl}\n"
336 "The following additional characters can be appended:\n"
339 "Open the underlying file in binary mode, if supported by the operating system. "
341 "Open the port for both input and output. E.g., @code{r+}: open\n"
342 "an existing file for both input and output.\n"
344 "Create an \"unbuffered\" port. In this case input and output\n"
345 "operations are passed directly to the underlying port\n"
346 "implementation without additional buffering. This is likely to\n"
347 "slow down I/O operations. The buffering mode can be changed\n"
348 "while a port is in use @pxref{Ports and File Descriptors,\n"
351 "Add line-buffering to the port. The port output buffer will be\n"
352 "automatically flushed whenever a newline character is written.\n"
354 "In theory we could create read/write ports which were buffered\n"
355 "in one direction only. However this isn't included in the\n"
356 "current interfaces. If a file cannot be opened with the access\n"
357 "requested, @code{open-file} throws an exception.")
358 #define FUNC_NAME s_scm_open_file
362 unsigned int retries
;
363 char *file
, *md
, *ptr
;
365 scm_dynwind_begin (0);
367 file
= scm_to_locale_string (filename
);
368 scm_dynwind_free (file
);
370 md
= scm_to_locale_string (mode
);
371 scm_dynwind_free (md
);
379 flags
|= O_WRONLY
| O_CREAT
| O_TRUNC
;
382 flags
|= O_WRONLY
| O_CREAT
| O_APPEND
;
385 scm_out_of_range (FUNC_NAME
, mode
);
393 flags
= (flags
& ~(O_RDONLY
| O_WRONLY
)) | O_RDWR
;
396 #if defined (O_BINARY)
400 case '0': /* unbuffered: handled later. */
401 case 'l': /* line buffered: handled during output. */
404 scm_out_of_range (FUNC_NAME
, mode
);
409 for (retries
= 0, fdes
= -1;
410 fdes
< 0 && retries
< 2;
413 SCM_SYSCALL (fdes
= open_or_open64 (file
, flags
, 0666));
418 if (en
== EMFILE
&& retries
== 0)
419 /* Run the GC in case it collects open file ports that are no
420 longer referenced. */
421 scm_i_gc (FUNC_NAME
);
423 SCM_SYSERROR_MSG ("~A: ~S",
424 scm_cons (scm_strerror (scm_from_int (en
)),
425 scm_cons (filename
, SCM_EOL
)), en
);
429 port
= scm_i_fdes_to_port (fdes
, scm_i_mode_bits (mode
),
430 fport_canonicalize_filename (filename
));
441 * Try getting the appropiate file flags for a given file descriptor
442 * under Windows. This incorporates some fancy operations because Windows
443 * differentiates between file, pipe and socket descriptors.
446 # define O_ACCMODE 0x0003
449 static int getflags (int fdes
)
453 int error
, optlen
= sizeof (int);
455 /* Is this a socket ? */
456 if (getsockopt (fdes
, SOL_SOCKET
, SO_ERROR
, (void *) &error
, &optlen
) >= 0)
458 /* Maybe a regular file ? */
459 else if (fstat (fdes
, &buf
) < 0)
463 /* Or an anonymous pipe handle ? */
464 if (buf
.st_mode
& _S_IFIFO
)
465 flags
= PeekNamedPipe ((HANDLE
) _get_osfhandle (fdes
), NULL
, 0,
466 NULL
, NULL
, NULL
) ? O_RDONLY
: O_WRONLY
;
468 else if (fdes
== fileno (stdin
) && isatty (fdes
))
470 /* stdout / stderr ? */
471 else if ((fdes
== fileno (stdout
) || fdes
== fileno (stderr
)) &&
479 #endif /* __MINGW32__ */
481 /* Building Guile ports from a file descriptor. */
483 /* Build a Scheme port from an open file descriptor `fdes'.
484 MODE indicates whether FILE is open for reading or writing; it uses
485 the same notation as open-file's second argument.
486 NAME is a string to be used as the port's filename.
489 scm_i_fdes_to_port (int fdes
, long mode_bits
, SCM name
)
490 #define FUNC_NAME "scm_fdes_to_port"
496 /* test that fdes is valid. */
498 flags
= getflags (fdes
);
500 flags
= fcntl (fdes
, F_GETFL
, 0);
506 && ((flags
!= O_WRONLY
&& (mode_bits
& SCM_WRTNG
))
507 || (flags
!= O_RDONLY
&& (mode_bits
& SCM_RDNG
))))
509 SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL
);
512 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
514 port
= scm_new_port_table_entry (scm_tc16_fport
);
515 SCM_SET_CELL_TYPE(port
, scm_tc16_fport
| mode_bits
);
516 pt
= SCM_PTAB_ENTRY(port
);
519 = (scm_t_fport
*) scm_gc_malloc_pointerless (sizeof (scm_t_fport
),
523 pt
->rw_random
= SCM_FDES_RANDOM_P (fdes
);
524 SCM_SETSTREAM (port
, fp
);
525 if (mode_bits
& SCM_BUF0
)
526 scm_fport_buffer_add (port
, 0, 0);
528 scm_fport_buffer_add (port
, -1, -1);
530 SCM_SET_FILENAME (port
, name
);
531 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
537 scm_fdes_to_port (int fdes
, char *mode
, SCM name
)
539 return scm_i_fdes_to_port (fdes
, scm_mode_bits (mode
), name
);
542 /* Return a lower bound on the number of bytes available for input. */
544 fport_input_waiting (SCM port
)
547 int fdes
= SCM_FSTREAM (port
)->fdes
;
548 struct timeval timeout
;
549 SELECT_TYPE read_set
;
550 SELECT_TYPE write_set
;
551 SELECT_TYPE except_set
;
554 FD_ZERO (&write_set
);
555 FD_ZERO (&except_set
);
557 FD_SET (fdes
, &read_set
);
562 if (select (SELECT_SET_SIZE
,
563 &read_set
, &write_set
, &except_set
, &timeout
)
565 scm_syserror ("fport_input_waiting");
566 return FD_ISSET (fdes
, &read_set
) ? 1 : 0;
568 #elif HAVE_IOCTL && defined (FIONREAD)
569 /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD
570 (for use with winsock ioctlsocket()) but not ioctl(). */
571 int fdes
= SCM_FSTREAM (port
)->fdes
;
573 ioctl(fdes
, FIONREAD
, &remir
);
577 scm_misc_error ("fport_input_waiting",
578 "Not fully implemented on this platform",
585 fport_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
587 scm_puts ("#<", port
);
588 scm_print_port_mode (exp
, port
);
589 if (SCM_OPFPORTP (exp
))
592 SCM name
= SCM_FILENAME (exp
);
593 if (scm_is_string (name
) || scm_is_symbol (name
))
594 scm_display (name
, port
);
596 scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp
)), port
);
597 scm_putc (' ', port
);
598 fdes
= (SCM_FSTREAM (exp
))->fdes
;
602 scm_display (scm_ttyname (exp
), port
);
604 #endif /* HAVE_TTYNAME */
605 scm_intprint (fdes
, 10, port
);
609 scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp
)), port
);
610 scm_putc (' ', port
);
611 scm_uintprint ((scm_t_bits
) SCM_PTAB_ENTRY (exp
), 16, port
);
613 scm_putc ('>', port
);
618 /* thread-local block for input on fport's fdes. */
620 fport_wait_for_input (SCM port
)
622 int fdes
= SCM_FSTREAM (port
)->fdes
;
624 if (!fport_input_waiting (port
))
628 int flags
= fcntl (fdes
, F_GETFL
);
631 scm_syserror ("scm_fdes_wait_for_input");
632 if (!(flags
& O_NONBLOCK
))
636 FD_SET (fdes
, &readfds
);
637 n
= scm_std_select (fdes
+ 1, &readfds
, NULL
, NULL
, NULL
);
639 while (n
== -1 && errno
== EINTR
);
642 #endif /* !__MINGW32__ */
644 static void fport_flush (SCM port
);
646 /* fill a port's read-buffer with a single read. returns the first
647 char or EOF if end of file. */
649 fport_fill_input (SCM port
)
652 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
653 scm_t_fport
*fp
= SCM_FSTREAM (port
);
656 fport_wait_for_input (port
);
657 #endif /* !__MINGW32__ */
658 SCM_SYSCALL (count
= read (fp
->fdes
, pt
->read_buf
, pt
->read_buf_size
));
660 scm_syserror ("fport_fill_input");
662 return (scm_t_wchar
) EOF
;
665 pt
->read_pos
= pt
->read_buf
;
666 pt
->read_end
= pt
->read_buf
+ count
;
667 return *pt
->read_buf
;
672 fport_seek (SCM port
, scm_t_off offset
, int whence
)
674 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
675 scm_t_fport
*fp
= SCM_FSTREAM (port
);
677 off_t_or_off64_t result
;
679 if (pt
->rw_active
== SCM_PORT_WRITE
)
681 if (offset
!= 0 || whence
!= SEEK_CUR
)
684 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
688 /* read current position without disturbing the buffer. */
689 rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
690 result
= rv
+ (pt
->write_pos
- pt
->write_buf
);
693 else if (pt
->rw_active
== SCM_PORT_READ
)
695 if (offset
!= 0 || whence
!= SEEK_CUR
)
697 /* could expand to avoid a second seek. */
698 scm_end_input (port
);
699 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
703 /* read current position without disturbing the buffer
704 (particularly the unread-char buffer). */
705 rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
706 result
= rv
- (pt
->read_end
- pt
->read_pos
);
708 if (pt
->read_buf
== pt
->putback_buf
)
709 result
-= pt
->saved_read_end
- pt
->saved_read_pos
;
712 else /* SCM_PORT_NEITHER */
714 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
718 scm_syserror ("fport_seek");
724 fport_truncate (SCM port
, scm_t_off length
)
726 scm_t_fport
*fp
= SCM_FSTREAM (port
);
728 if (ftruncate (fp
->fdes
, length
) == -1)
729 scm_syserror ("ftruncate");
733 fport_write (SCM port
, const void *data
, size_t size
)
734 #define FUNC_NAME "fport_write"
736 /* this procedure tries to minimize the number of writes/flushes. */
737 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
739 if (pt
->write_buf
== &pt
->shortbuf
740 || (pt
->write_pos
== pt
->write_buf
&& size
>= pt
->write_buf_size
))
742 /* Unbuffered port, or port with empty buffer and data won't fit in
744 if (full_write (SCM_FPORT_FDES (port
), data
, size
) < size
)
751 scm_t_off space
= pt
->write_end
- pt
->write_pos
;
755 /* data fits in buffer. */
756 memcpy (pt
->write_pos
, data
, size
);
757 pt
->write_pos
+= size
;
758 if (pt
->write_pos
== pt
->write_end
)
761 /* we can skip the line-buffering check if nothing's buffered. */
767 memcpy (pt
->write_pos
, data
, space
);
768 pt
->write_pos
= pt
->write_end
;
771 const void *ptr
= ((const char *) data
) + space
;
772 size_t remaining
= size
- space
;
774 if (size
>= pt
->write_buf_size
)
776 if (full_write (SCM_FPORT_FDES (port
), ptr
, remaining
)
783 memcpy (pt
->write_pos
, ptr
, remaining
);
784 pt
->write_pos
+= remaining
;
789 /* handle line buffering. */
790 if ((SCM_CELL_WORD_0 (port
) & SCM_BUFLINE
) && memchr (data
, '\n', size
))
796 /* becomes 1 when process is exiting: normal exception handling won't
797 work by this time. */
798 extern int scm_i_terminating
;
801 fport_flush (SCM port
)
803 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
804 scm_t_fport
*fp
= SCM_FSTREAM (port
);
805 unsigned char *ptr
= pt
->write_buf
;
806 long init_size
= pt
->write_pos
- pt
->write_buf
;
807 long remaining
= init_size
;
809 while (remaining
> 0)
813 SCM_SYSCALL (count
= write (fp
->fdes
, ptr
, remaining
));
816 /* error. assume nothing was written this call, but
817 fix up the buffer for any previous successful writes. */
818 long done
= init_size
- remaining
;
824 for (i
= 0; i
< remaining
; i
++)
826 *(pt
->write_buf
+ i
) = *(pt
->write_buf
+ done
+ i
);
828 pt
->write_pos
= pt
->write_buf
+ remaining
;
830 if (scm_i_terminating
)
832 const char *msg
= "Error: could not flush file-descriptor ";
835 full_write (2, msg
, strlen (msg
));
836 sprintf (buf
, "%d\n", fp
->fdes
);
837 full_write (2, buf
, strlen (buf
));
841 else if (scm_gc_running_p
)
843 /* silently ignore the error. scm_error would abort if we
848 scm_syserror ("fport_flush");
853 pt
->write_pos
= pt
->write_buf
;
854 pt
->rw_active
= SCM_PORT_NEITHER
;
857 /* clear the read buffer and adjust the file position for unread bytes. */
859 fport_end_input (SCM port
, int offset
)
861 scm_t_fport
*fp
= SCM_FSTREAM (port
);
862 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
864 offset
+= pt
->read_end
- pt
->read_pos
;
868 pt
->read_pos
= pt
->read_end
;
869 /* will throw error if unread-char used at beginning of file
870 then attempting to write. seems correct. */
871 if (lseek (fp
->fdes
, -offset
, SEEK_CUR
) == -1)
872 scm_syserror ("fport_end_input");
874 pt
->rw_active
= SCM_PORT_NEITHER
;
878 fport_close (SCM port
)
880 scm_t_fport
*fp
= SCM_FSTREAM (port
);
881 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
885 SCM_SYSCALL (rv
= close (fp
->fdes
));
886 if (rv
== -1 && errno
!= EBADF
)
888 if (scm_gc_running_p
)
889 /* silently ignore the error. scm_error would abort if we
893 scm_syserror ("fport_close");
895 if (pt
->read_buf
== pt
->putback_buf
)
896 pt
->read_buf
= pt
->saved_read_buf
;
897 if (pt
->read_buf
!= &pt
->shortbuf
)
898 scm_gc_free (pt
->read_buf
, pt
->read_buf_size
, "port buffer");
899 if (pt
->write_buf
!= &pt
->shortbuf
)
900 scm_gc_free (pt
->write_buf
, pt
->write_buf_size
, "port buffer");
901 scm_gc_free (fp
, sizeof (*fp
), "file port");
906 fport_free (SCM port
)
915 scm_t_bits tc
= scm_make_port_type ("file", fport_fill_input
, fport_write
);
917 scm_set_port_free (tc
, fport_free
);
918 scm_set_port_print (tc
, fport_print
);
919 scm_set_port_flush (tc
, fport_flush
);
920 scm_set_port_end_input (tc
, fport_end_input
);
921 scm_set_port_close (tc
, fport_close
);
922 scm_set_port_seek (tc
, fport_seek
);
923 scm_set_port_truncate (tc
, fport_truncate
);
924 scm_set_port_input_waiting (tc
, fport_input_waiting
);
932 scm_tc16_fport
= scm_make_fptob ();
934 scm_c_define ("_IOFBF", scm_from_int (_IOFBF
));
935 scm_c_define ("_IOLBF", scm_from_int (_IOLBF
));
936 scm_c_define ("_IONBF", scm_from_int (_IONBF
));
938 sys_file_port_name_canonicalization
= scm_make_fluid ();
939 scm_c_define ("%file-port-name-canonicalization",
940 sys_file_port_name_canonicalization
);
942 #include "libguile/fports.x"