1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009 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 HAVE_CHSIZE && ! HAVE_FTRUNCATE
73 # define ftruncate(fd, size) chsize (fd, size)
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
));
270 * Return a new port open on a given file.
272 * The mode string must match the pattern: [rwa+]** which
273 * is interpreted in the usual unix way.
275 * Return the new port.
277 SCM_DEFINE (scm_open_file
, "open-file", 2, 0, 0,
278 (SCM filename
, SCM mode
),
279 "Open the file whose name is @var{filename}, and return a port\n"
280 "representing that file. The attributes of the port are\n"
281 "determined by the @var{mode} string. The way in which this is\n"
282 "interpreted is similar to C stdio. The first character must be\n"
283 "one of the following:\n"
286 "Open an existing file for input.\n"
288 "Open a file for output, creating it if it doesn't already exist\n"
289 "or removing its contents if it does.\n"
291 "Open a file for output, creating it if it doesn't already\n"
292 "exist. All writes to the port will go to the end of the file.\n"
293 "The \"append mode\" can be turned off while the port is in use\n"
294 "@pxref{Ports and File Descriptors, fcntl}\n"
296 "The following additional characters can be appended:\n"
299 "Open the underlying file in binary mode, if supported by the operating system. "
301 "Open the port for both input and output. E.g., @code{r+}: open\n"
302 "an existing file for both input and output.\n"
304 "Create an \"unbuffered\" port. In this case input and output\n"
305 "operations are passed directly to the underlying port\n"
306 "implementation without additional buffering. This is likely to\n"
307 "slow down I/O operations. The buffering mode can be changed\n"
308 "while a port is in use @pxref{Ports and File Descriptors,\n"
311 "Add line-buffering to the port. The port output buffer will be\n"
312 "automatically flushed whenever a newline character is written.\n"
314 "In theory we could create read/write ports which were buffered\n"
315 "in one direction only. However this isn't included in the\n"
316 "current interfaces. If a file cannot be opened with the access\n"
317 "requested, @code{open-file} throws an exception.")
318 #define FUNC_NAME s_scm_open_file
327 scm_dynwind_begin (0);
329 file
= scm_to_locale_string (filename
);
330 scm_dynwind_free (file
);
332 md
= scm_to_locale_string (mode
);
333 scm_dynwind_free (md
);
341 flags
|= O_WRONLY
| O_CREAT
| O_TRUNC
;
344 flags
|= O_WRONLY
| O_CREAT
| O_APPEND
;
347 scm_out_of_range (FUNC_NAME
, mode
);
355 flags
= (flags
& ~(O_RDONLY
| O_WRONLY
)) | O_RDWR
;
358 #if defined (O_BINARY)
362 case '0': /* unbuffered: handled later. */
363 case 'l': /* line buffered: handled during output. */
366 scm_out_of_range (FUNC_NAME
, mode
);
370 SCM_SYSCALL (fdes
= open_or_open64 (file
, flags
, 0666));
375 SCM_SYSERROR_MSG ("~A: ~S",
376 scm_cons (scm_strerror (scm_from_int (en
)),
377 scm_cons (filename
, SCM_EOL
)), en
);
379 port
= scm_i_fdes_to_port (fdes
, scm_i_mode_bits (mode
), filename
);
390 * Try getting the appropiate file flags for a given file descriptor
391 * under Windows. This incorporates some fancy operations because Windows
392 * differentiates between file, pipe and socket descriptors.
395 # define O_ACCMODE 0x0003
398 static int getflags (int fdes
)
402 int error
, optlen
= sizeof (int);
404 /* Is this a socket ? */
405 if (getsockopt (fdes
, SOL_SOCKET
, SO_ERROR
, (void *) &error
, &optlen
) >= 0)
407 /* Maybe a regular file ? */
408 else if (fstat (fdes
, &buf
) < 0)
412 /* Or an anonymous pipe handle ? */
413 if (buf
.st_mode
& _S_IFIFO
)
414 flags
= PeekNamedPipe ((HANDLE
) _get_osfhandle (fdes
), NULL
, 0,
415 NULL
, NULL
, NULL
) ? O_RDONLY
: O_WRONLY
;
417 else if (fdes
== fileno (stdin
) && isatty (fdes
))
419 /* stdout / stderr ? */
420 else if ((fdes
== fileno (stdout
) || fdes
== fileno (stderr
)) &&
428 #endif /* __MINGW32__ */
430 /* Building Guile ports from a file descriptor. */
432 /* Build a Scheme port from an open file descriptor `fdes'.
433 MODE indicates whether FILE is open for reading or writing; it uses
434 the same notation as open-file's second argument.
435 NAME is a string to be used as the port's filename.
438 scm_i_fdes_to_port (int fdes
, long mode_bits
, SCM name
)
439 #define FUNC_NAME "scm_fdes_to_port"
445 /* test that fdes is valid. */
447 flags
= getflags (fdes
);
449 flags
= fcntl (fdes
, F_GETFL
, 0);
455 && ((flags
!= O_WRONLY
&& (mode_bits
& SCM_WRTNG
))
456 || (flags
!= O_RDONLY
&& (mode_bits
& SCM_RDNG
))))
458 SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL
);
461 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
463 port
= scm_new_port_table_entry (scm_tc16_fport
);
464 SCM_SET_CELL_TYPE(port
, scm_tc16_fport
| mode_bits
);
465 pt
= SCM_PTAB_ENTRY(port
);
468 = (scm_t_fport
*) scm_gc_malloc_pointerless (sizeof (scm_t_fport
),
472 pt
->rw_random
= SCM_FDES_RANDOM_P (fdes
);
473 SCM_SETSTREAM (port
, fp
);
474 if (mode_bits
& SCM_BUF0
)
475 scm_fport_buffer_add (port
, 0, 0);
477 scm_fport_buffer_add (port
, -1, -1);
479 SCM_SET_FILENAME (port
, name
);
480 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
486 scm_fdes_to_port (int fdes
, char *mode
, SCM name
)
488 return scm_i_fdes_to_port (fdes
, scm_mode_bits (mode
), name
);
491 /* Return a lower bound on the number of bytes available for input. */
493 fport_input_waiting (SCM port
)
496 int fdes
= SCM_FSTREAM (port
)->fdes
;
497 struct timeval timeout
;
498 SELECT_TYPE read_set
;
499 SELECT_TYPE write_set
;
500 SELECT_TYPE except_set
;
503 FD_ZERO (&write_set
);
504 FD_ZERO (&except_set
);
506 FD_SET (fdes
, &read_set
);
511 if (select (SELECT_SET_SIZE
,
512 &read_set
, &write_set
, &except_set
, &timeout
)
514 scm_syserror ("fport_input_waiting");
515 return FD_ISSET (fdes
, &read_set
) ? 1 : 0;
517 #elif HAVE_IOCTL && defined (FIONREAD)
518 /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD
519 (for use with winsock ioctlsocket()) but not ioctl(). */
520 int fdes
= SCM_FSTREAM (port
)->fdes
;
522 ioctl(fdes
, FIONREAD
, &remir
);
526 scm_misc_error ("fport_input_waiting",
527 "Not fully implemented on this platform",
534 fport_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
536 scm_puts ("#<", port
);
537 scm_print_port_mode (exp
, port
);
538 if (SCM_OPFPORTP (exp
))
541 SCM name
= SCM_FILENAME (exp
);
542 if (scm_is_string (name
) || scm_is_symbol (name
))
543 scm_display (name
, port
);
545 scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp
)), port
);
546 scm_putc (' ', port
);
547 fdes
= (SCM_FSTREAM (exp
))->fdes
;
551 scm_display (scm_ttyname (exp
), port
);
553 #endif /* HAVE_TTYNAME */
554 scm_intprint (fdes
, 10, port
);
558 scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp
)), port
);
559 scm_putc (' ', port
);
560 scm_uintprint ((scm_t_bits
) SCM_PTAB_ENTRY (exp
), 16, port
);
562 scm_putc ('>', port
);
567 /* thread-local block for input on fport's fdes. */
569 fport_wait_for_input (SCM port
)
571 int fdes
= SCM_FSTREAM (port
)->fdes
;
573 if (!fport_input_waiting (port
))
577 int flags
= fcntl (fdes
, F_GETFL
);
580 scm_syserror ("scm_fdes_wait_for_input");
581 if (!(flags
& O_NONBLOCK
))
585 FD_SET (fdes
, &readfds
);
586 n
= scm_std_select (fdes
+ 1, &readfds
, NULL
, NULL
, NULL
);
588 while (n
== -1 && errno
== EINTR
);
591 #endif /* !__MINGW32__ */
593 static void fport_flush (SCM port
);
595 /* fill a port's read-buffer with a single read. returns the first
596 char or EOF if end of file. */
598 fport_fill_input (SCM port
)
601 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
602 scm_t_fport
*fp
= SCM_FSTREAM (port
);
605 fport_wait_for_input (port
);
606 #endif /* !__MINGW32__ */
607 SCM_SYSCALL (count
= read (fp
->fdes
, pt
->read_buf
, pt
->read_buf_size
));
609 scm_syserror ("fport_fill_input");
614 pt
->read_pos
= pt
->read_buf
;
615 pt
->read_end
= pt
->read_buf
+ count
;
616 return *pt
->read_buf
;
621 fport_seek (SCM port
, scm_t_off offset
, int whence
)
623 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
624 scm_t_fport
*fp
= SCM_FSTREAM (port
);
626 off_t_or_off64_t result
;
628 if (pt
->rw_active
== SCM_PORT_WRITE
)
630 if (offset
!= 0 || whence
!= SEEK_CUR
)
633 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
637 /* read current position without disturbing the buffer. */
638 rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
639 result
= rv
+ (pt
->write_pos
- pt
->write_buf
);
642 else if (pt
->rw_active
== SCM_PORT_READ
)
644 if (offset
!= 0 || whence
!= SEEK_CUR
)
646 /* could expand to avoid a second seek. */
647 scm_end_input (port
);
648 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
652 /* read current position without disturbing the buffer
653 (particularly the unread-char buffer). */
654 rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
655 result
= rv
- (pt
->read_end
- pt
->read_pos
);
657 if (pt
->read_buf
== pt
->putback_buf
)
658 result
-= pt
->saved_read_end
- pt
->saved_read_pos
;
661 else /* SCM_PORT_NEITHER */
663 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
667 scm_syserror ("fport_seek");
673 fport_truncate (SCM port
, scm_t_off length
)
675 scm_t_fport
*fp
= SCM_FSTREAM (port
);
677 if (ftruncate (fp
->fdes
, length
) == -1)
678 scm_syserror ("ftruncate");
681 /* helper for fport_write: try to write data, using multiple system
682 calls if required. */
683 #define FUNC_NAME "write_all"
684 static void write_all (SCM port
, const void *data
, size_t remaining
)
686 int fdes
= SCM_FSTREAM (port
)->fdes
;
688 while (remaining
> 0)
692 SCM_SYSCALL (done
= write (fdes
, data
, remaining
));
697 data
= ((const char *) data
) + done
;
703 fport_write (SCM port
, const void *data
, size_t size
)
705 /* this procedure tries to minimize the number of writes/flushes. */
706 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
708 if (pt
->write_buf
== &pt
->shortbuf
709 || (pt
->write_pos
== pt
->write_buf
&& size
>= pt
->write_buf_size
))
711 /* "unbuffered" port, or
712 port with empty buffer and data won't fit in buffer. */
713 write_all (port
, data
, size
);
718 scm_t_off space
= pt
->write_end
- pt
->write_pos
;
722 /* data fits in buffer. */
723 memcpy (pt
->write_pos
, data
, size
);
724 pt
->write_pos
+= size
;
725 if (pt
->write_pos
== pt
->write_end
)
728 /* we can skip the line-buffering check if nothing's buffered. */
734 memcpy (pt
->write_pos
, data
, space
);
735 pt
->write_pos
= pt
->write_end
;
738 const void *ptr
= ((const char *) data
) + space
;
739 size_t remaining
= size
- space
;
741 if (size
>= pt
->write_buf_size
)
743 write_all (port
, ptr
, remaining
);
748 memcpy (pt
->write_pos
, ptr
, remaining
);
749 pt
->write_pos
+= remaining
;
754 /* handle line buffering. */
755 if ((SCM_CELL_WORD_0 (port
) & SCM_BUFLINE
) && memchr (data
, '\n', size
))
760 /* becomes 1 when process is exiting: normal exception handling won't
761 work by this time. */
762 extern int scm_i_terminating
;
765 fport_flush (SCM port
)
767 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
768 scm_t_fport
*fp
= SCM_FSTREAM (port
);
769 unsigned char *ptr
= pt
->write_buf
;
770 long init_size
= pt
->write_pos
- pt
->write_buf
;
771 long remaining
= init_size
;
773 while (remaining
> 0)
777 SCM_SYSCALL (count
= write (fp
->fdes
, ptr
, remaining
));
780 /* error. assume nothing was written this call, but
781 fix up the buffer for any previous successful writes. */
782 long done
= init_size
- remaining
;
788 for (i
= 0; i
< remaining
; i
++)
790 *(pt
->write_buf
+ i
) = *(pt
->write_buf
+ done
+ i
);
792 pt
->write_pos
= pt
->write_buf
+ remaining
;
794 if (scm_i_terminating
)
796 const char *msg
= "Error: could not flush file-descriptor ";
799 full_write (2, msg
, strlen (msg
));
800 sprintf (buf
, "%d\n", fp
->fdes
);
801 full_write (2, buf
, strlen (buf
));
805 else if (scm_gc_running_p
)
807 /* silently ignore the error. scm_error would abort if we
812 scm_syserror ("fport_flush");
817 pt
->write_pos
= pt
->write_buf
;
818 pt
->rw_active
= SCM_PORT_NEITHER
;
821 /* clear the read buffer and adjust the file position for unread bytes. */
823 fport_end_input (SCM port
, int offset
)
825 scm_t_fport
*fp
= SCM_FSTREAM (port
);
826 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
828 offset
+= pt
->read_end
- pt
->read_pos
;
832 pt
->read_pos
= pt
->read_end
;
833 /* will throw error if unread-char used at beginning of file
834 then attempting to write. seems correct. */
835 if (lseek (fp
->fdes
, -offset
, SEEK_CUR
) == -1)
836 scm_syserror ("fport_end_input");
838 pt
->rw_active
= SCM_PORT_NEITHER
;
842 fport_close (SCM port
)
844 scm_t_fport
*fp
= SCM_FSTREAM (port
);
845 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
849 SCM_SYSCALL (rv
= close (fp
->fdes
));
850 if (rv
== -1 && errno
!= EBADF
)
852 if (scm_gc_running_p
)
853 /* silently ignore the error. scm_error would abort if we
857 scm_syserror ("fport_close");
859 if (pt
->read_buf
== pt
->putback_buf
)
860 pt
->read_buf
= pt
->saved_read_buf
;
861 if (pt
->read_buf
!= &pt
->shortbuf
)
862 scm_gc_free (pt
->read_buf
, pt
->read_buf_size
, "port buffer");
863 if (pt
->write_buf
!= &pt
->shortbuf
)
864 scm_gc_free (pt
->write_buf
, pt
->write_buf_size
, "port buffer");
865 scm_gc_free (fp
, sizeof (*fp
), "file port");
870 fport_free (SCM port
)
879 scm_t_bits tc
= scm_make_port_type ("file", fport_fill_input
, fport_write
);
881 scm_set_port_free (tc
, fport_free
);
882 scm_set_port_print (tc
, fport_print
);
883 scm_set_port_flush (tc
, fport_flush
);
884 scm_set_port_end_input (tc
, fport_end_input
);
885 scm_set_port_close (tc
, fport_close
);
886 scm_set_port_seek (tc
, fport_seek
);
887 scm_set_port_truncate (tc
, fport_truncate
);
888 scm_set_port_input_waiting (tc
, fport_input_waiting
);
896 scm_tc16_fport
= scm_make_fptob ();
898 scm_c_define ("_IOFBF", scm_from_int (_IOFBF
));
899 scm_c_define ("_IOLBF", scm_from_int (_IOLBF
));
900 scm_c_define ("_IONBF", scm_from_int (_IONBF
));
902 #include "libguile/fports.x"