source: rtems/cpukit/libcsupport/include/rtems/libio.h @ 615d8cc

4.10
Last change on this file since 615d8cc was 615d8cc, checked in by Sebastian Huber <sebastian.huber@…>, on Jul 1, 2010 at 2:29:09 PM

2010-06-08 Sebastian Huber <sebastian.huber@…>

  • libcsupport/include/rtems/libio.h: Documentation.

2010-06-08 Sebastian Huber <sebastian.huber@…>

PR 1524/filesystem

  • libcsupport/src/rtems_mkdir.c: New file.
  • libcsupport/src/Makefile.am: Reflect change above.
  • libcsupport/include/rtems/libio.h: Added rtems_mkdir().
  • libmisc/fsmount/fsmount.h, libmisc/fsmount/fsmount.c, libblock/src/bdpart-mount.c, libnetworking/rtems/mkrootfs.h, libnetworking/rtems/mkrootfs.c: Use rtems_mkdir(). Removed rtems_fsmount_create_mount_point() and rtems_rootfs_mkdir().
  • Property mode set to 100644
File size: 20.2 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup LibIO
5 *
6 * @brief Basic IO API.
7 */
8
9/*
10 *  COPYRIGHT (c) 1989-2008.
11 *  On-Line Applications Research Corporation (OAR).
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.rtems.com/license/LICENSE.
16 *
17 *  $Id$
18 */
19
20#ifndef _RTEMS_RTEMS_LIBIO_H
21#define _RTEMS_RTEMS_LIBIO_H
22
23#include <sys/types.h>
24#include <sys/stat.h>
25#include <sys/ioctl.h>
26#include <sys/statvfs.h>
27
28#include <unistd.h>
29#include <termios.h>
30
31#include <rtems.h>
32#include <rtems/fs.h>
33#include <rtems/chain.h>
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39/**
40 * @defgroup LibIO IO Library
41 *
42 * @brief Provides system call and file system interface definitions.
43 *
44 * General purpose communication channel for RTEMS to allow UNIX/POSIX
45 * system call behavior under RTEMS.  Initially this supported only
46 * IO to devices but has since been enhanced to support networking
47 * and support for mounted file systems.
48 *
49 * @{
50 */
51
52/**
53 * @brief A 64-bit file offset for internal use by RTEMS. Based on the Newlib
54 * type.
55 */
56typedef _off64_t rtems_off64_t;
57
58/**
59 * @name File system node types.
60 *
61 * @{
62 */
63
64#define RTEMS_FILESYSTEM_DIRECTORY   1
65#define RTEMS_FILESYSTEM_DEVICE      2
66#define RTEMS_FILESYSTEM_HARD_LINK   3
67#define RTEMS_FILESYSTEM_SYM_LINK    4
68#define RTEMS_FILESYSTEM_MEMORY_FILE 5
69
70/** @} */
71
72typedef int rtems_filesystem_node_types_t;
73
74/**
75 * @name File System Node Operations
76 *
77 * @{
78 */
79
80typedef int (*rtems_filesystem_open_t)(
81  rtems_libio_t *iop,
82  const char    *pathname,
83  uint32_t       flag,
84  uint32_t       mode
85);
86
87typedef int (*rtems_filesystem_close_t)(
88  rtems_libio_t *iop
89);
90
91typedef ssize_t (*rtems_filesystem_read_t)(
92  rtems_libio_t *iop,
93  void          *buffer,
94  size_t         count
95);
96
97typedef ssize_t (*rtems_filesystem_write_t)(
98  rtems_libio_t *iop,
99  const void    *buffer,
100  size_t         count
101);
102
103typedef int (*rtems_filesystem_ioctl_t)(
104  rtems_libio_t *iop,
105  uint32_t       command,
106  void          *buffer
107);
108
109typedef rtems_off64_t (*rtems_filesystem_lseek_t)(
110  rtems_libio_t *iop,
111  rtems_off64_t  length,
112  int            whence
113);
114
115typedef int (*rtems_filesystem_fstat_t)(
116  rtems_filesystem_location_info_t *loc,
117  struct stat                      *buf
118);
119
120typedef int (*rtems_filesystem_fchmod_t)(
121  rtems_filesystem_location_info_t *loc,
122  mode_t                            mode
123);
124
125typedef int (*rtems_filesystem_ftruncate_t)(
126  rtems_libio_t *iop,
127  rtems_off64_t  length
128);
129
130typedef int (*rtems_filesystem_fpathconf_t)(
131  rtems_libio_t *iop,
132  int name
133);
134
135typedef int (*rtems_filesystem_fsync_t)(
136  rtems_libio_t *iop
137);
138
139typedef int (*rtems_filesystem_fdatasync_t)(
140  rtems_libio_t *iop
141);
142
143typedef int (*rtems_filesystem_fcntl_t)(
144  int            cmd,
145  rtems_libio_t *iop
146);
147
148typedef int (*rtems_filesystem_rmnod_t)(
149 rtems_filesystem_location_info_t      *parent_loc,   /* IN */
150 rtems_filesystem_location_info_t      *pathloc       /* IN */
151);
152
153/** @} */
154
155/**
156 * @brief File system node operations table.
157 */
158struct _rtems_filesystem_file_handlers_r {
159    rtems_filesystem_open_t         open_h;
160    rtems_filesystem_close_t        close_h;
161    rtems_filesystem_read_t         read_h;
162    rtems_filesystem_write_t        write_h;
163    rtems_filesystem_ioctl_t        ioctl_h;
164    rtems_filesystem_lseek_t        lseek_h;
165    rtems_filesystem_fstat_t        fstat_h;
166    rtems_filesystem_fchmod_t       fchmod_h;
167    rtems_filesystem_ftruncate_t    ftruncate_h;
168    rtems_filesystem_fpathconf_t    fpathconf_h;
169    rtems_filesystem_fsync_t        fsync_h;
170    rtems_filesystem_fdatasync_t    fdatasync_h;
171    rtems_filesystem_fcntl_t        fcntl_h;
172    rtems_filesystem_rmnod_t        rmnod_h;
173};
174
175/**
176 * @name File System Operations
177 *
178 * @{
179 */
180
181/*
182 *  XXX
183 *  This routine does not allocate any space and rtems_filesystem_freenode_t
184 *  is not called by the generic after calling this routine.
185 *  ie. node_access does not have to contain valid data when the
186 *      routine returns.
187 */
188typedef int (*rtems_filesystem_mknod_t)(
189   const char                        *path,       /* IN */
190   mode_t                             mode,       /* IN */
191   dev_t                              dev,        /* IN */
192   rtems_filesystem_location_info_t  *pathloc     /* IN/OUT */
193);
194
195/*
196 *  rtems_filesystem_freenode_t must be called by the generic after
197 *  calling this routine
198 */
199
200typedef int (*rtems_filesystem_evalpath_t)(
201  const char                        *pathname,      /* IN     */
202  size_t                             pathnamelen,   /* IN     */
203  int                                flags,         /* IN     */
204  rtems_filesystem_location_info_t  *pathloc        /* IN/OUT */
205);
206
207typedef int (*rtems_filesystem_evalmake_t)(
208   const char                       *path,       /* IN */
209   rtems_filesystem_location_info_t *pathloc,    /* IN/OUT */
210   const char                      **name        /* OUT    */
211);
212
213typedef int (*rtems_filesystem_link_t)(
214 rtems_filesystem_location_info_t  *to_loc,      /* IN */
215 rtems_filesystem_location_info_t  *parent_loc,  /* IN */
216 const char                        *name         /* IN */
217);
218
219typedef int (*rtems_filesystem_unlink_t)(
220 rtems_filesystem_location_info_t  *parent_pathloc, /* IN */
221 rtems_filesystem_location_info_t  *pathloc         /* IN */
222);
223
224typedef int (*rtems_filesystem_chown_t)(
225 rtems_filesystem_location_info_t  *pathloc,       /* IN */
226 uid_t                              owner,         /* IN */
227 gid_t                              group          /* IN */
228);
229
230typedef int (*rtems_filesystem_freenode_t)(
231 rtems_filesystem_location_info_t      *pathloc       /* IN */
232);
233
234typedef int (* rtems_filesystem_mount_t ) (
235   rtems_filesystem_mount_table_entry_t *mt_entry     /* IN */
236);
237
238typedef int (* rtems_filesystem_fsmount_me_t )(
239  rtems_filesystem_mount_table_entry_t *mt_entry,     /* IN */
240  const void                           *data          /* IN */
241);
242
243typedef int (* rtems_filesystem_unmount_t ) (
244  rtems_filesystem_mount_table_entry_t *mt_entry     /* IN */
245);
246
247typedef int (* rtems_filesystem_fsunmount_me_t ) (
248   rtems_filesystem_mount_table_entry_t *mt_entry    /* IN */
249);
250
251typedef rtems_filesystem_node_types_t (* rtems_filesystem_node_type_t) (
252  rtems_filesystem_location_info_t    *pathloc      /* IN */
253);
254
255typedef int (* rtems_filesystem_utime_t)(
256  rtems_filesystem_location_info_t  *pathloc,       /* IN */
257  time_t                             actime,        /* IN */
258  time_t                             modtime        /* IN */
259);
260
261typedef int (*rtems_filesystem_evaluate_link_t)(
262  rtems_filesystem_location_info_t *pathloc,     /* IN/OUT */
263  int                               flags        /* IN     */
264);
265
266typedef int (*rtems_filesystem_symlink_t)(
267 rtems_filesystem_location_info_t  *loc,         /* IN */
268 const char                        *link_name,   /* IN */
269 const char                        *node_name
270);
271
272typedef int (*rtems_filesystem_readlink_t)(
273 rtems_filesystem_location_info_t  *loc,     /* IN  */
274 char                              *buf,     /* OUT */
275 size_t                            bufsize
276);
277
278typedef int (*rtems_filesystem_rename_t)(
279 rtems_filesystem_location_info_t  *old_parent_loc,  /* IN */
280 rtems_filesystem_location_info_t  *old_loc,         /* IN */
281 rtems_filesystem_location_info_t  *new_parent_loc,  /* IN */
282 const char                        *name             /* IN */
283);
284
285typedef int (*rtems_filesystem_statvfs_t)(
286 rtems_filesystem_location_info_t  *loc,     /* IN  */
287 struct statvfs                    *buf      /* OUT */
288);
289
290/** @} */
291
292/**
293 * @brief File system operations table.
294 */
295struct _rtems_filesystem_operations_table {
296    rtems_filesystem_evalpath_t      evalpath_h;
297    rtems_filesystem_evalmake_t      evalformake_h;
298    rtems_filesystem_link_t          link_h;
299    rtems_filesystem_unlink_t        unlink_h;
300    rtems_filesystem_node_type_t     node_type_h;
301    rtems_filesystem_mknod_t         mknod_h;
302    rtems_filesystem_chown_t         chown_h;
303    rtems_filesystem_freenode_t      freenod_h;
304    rtems_filesystem_mount_t         mount_h;
305    rtems_filesystem_fsmount_me_t    fsmount_me_h;
306    rtems_filesystem_unmount_t       unmount_h;
307    rtems_filesystem_fsunmount_me_t  fsunmount_me_h;
308    rtems_filesystem_utime_t         utime_h;
309    rtems_filesystem_evaluate_link_t eval_link_h;
310    rtems_filesystem_symlink_t       symlink_h;
311    rtems_filesystem_readlink_t      readlink_h;
312    rtems_filesystem_rename_t        rename_h;
313    rtems_filesystem_statvfs_t       statvfs_h;
314};
315
316/**
317 * @brief File system table entry.
318 */
319typedef struct rtems_filesystem_table_t {
320  const char                    *type;
321  rtems_filesystem_fsmount_me_t  mount_h;
322} rtems_filesystem_table_t;
323
324/**
325 * @brief Static table of file systems.
326 *
327 * Externally defined by confdefs.h or the user.
328 */
329extern const rtems_filesystem_table_t rtems_filesystem_table [];
330
331/**
332 * @brief Per file system table entry routine type.
333 *
334 * @see rtems_filesystem_iterate().
335 *
336 * @retval true Continue the iteration.
337 * @retval false Stop the iteration.
338 */
339typedef bool (*rtems_per_filesystem_routine)(
340  const rtems_filesystem_table_t *entry,
341  void *arg
342);
343
344/**
345 * @brief Iterates over the file system table.
346 *
347 * For each file system table entry the @a routine will be called with the
348 * table entry and the @a routine_arg parameter.
349 */
350void
351rtems_filesystem_iterate(
352  rtems_per_filesystem_routine routine,
353  void *routine_arg
354);
355
356/**
357 * @brief Gets the mount handler for the file system @a type.
358 *
359 * @return The file system mount handler associated with the @a type, or
360 * @c NULL if no such association exists.
361 */
362rtems_filesystem_fsmount_me_t
363rtems_filesystem_get_mount_handler(
364  const char *type
365);
366
367/*
368 * Get the first entry in the mount table.
369 */
370rtems_filesystem_mount_table_entry_t*
371rtems_filesystem_mounts_first( void );
372
373/*
374 * Get the next entry in the mount table.
375 */
376rtems_filesystem_mount_table_entry_t*
377rtems_filesystem_mounts_next( rtems_filesystem_mount_table_entry_t *entry );
378
379/*
380 * Register a file system.
381 */
382int
383rtems_filesystem_register(
384  const char                    *type,
385  rtems_filesystem_fsmount_me_t  mount_h
386);
387
388/*
389 * Unregister a file system.
390 */
391int
392rtems_filesystem_unregister(
393  const char *type
394);
395
396/**
397 * @brief Contain file system specific information which is required to support
398 * fpathconf().
399 */
400typedef struct {
401  int    link_max;                 /* count */
402  int    max_canon;                /* max formatted input line size */
403  int    max_input;                /* max input line size */
404  int    name_max;                 /* max name length */
405  int    path_max;                 /* max path */
406  int    pipe_buf;                 /* pipe buffer size */
407  int    posix_async_io;           /* async IO supported on fs, 0=no, 1=yes */
408  int    posix_chown_restrictions; /* can chown: 0=no, 1=yes */
409  int    posix_no_trunc;           /* error on names > max name, 0=no, 1=yes */
410  int    posix_prio_io;            /* priority IO, 0=no, 1=yes */
411  int    posix_sync_io;            /* file can be sync'ed, 0=no, 1=yes */
412  int    posix_vdisable;           /* special char processing, 0=no, 1=yes */
413} rtems_filesystem_limits_and_options_t;
414
415/**
416 * @brief Default pathconf settings.
417 *
418 * Override in a filesystem.
419 */
420extern const rtems_filesystem_limits_and_options_t rtems_filesystem_default_pathconf;
421
422/**
423 * @brief Mount table entry.
424 */
425struct rtems_filesystem_mount_table_entry_tt {
426  rtems_chain_node                       Node;
427  rtems_filesystem_location_info_t       mt_point_node;
428  rtems_filesystem_location_info_t       mt_fs_root;
429  int                                    options;
430  void                                  *fs_info;
431
432  rtems_filesystem_limits_and_options_t  pathconf_limits_and_options;
433
434  /*
435   * The target or mount point of the file system.
436   */
437  const char                            *target;
438
439  /*
440   * The type of filesystem or the name of the filesystem.
441   */
442  const char                            *type;
443
444  /*
445   *  When someone adds a mounted filesystem on a real device,
446   *  this will need to be used.
447   *
448   *  The lower layers can manage how this is managed. Leave as a
449   *  string.
450   */
451  char                                  *dev;
452};
453
454/**
455 * @brief The pathconf setting for a file system.
456 */
457#define rtems_filesystem_pathconf(_mte) ((_mte)->pathconf_limits_and_options)
458
459/**
460 * @brief The type of file system. Its name.
461 */
462#define rtems_filesystem_type(_mte) ((_mte)->type)
463
464/**
465 * @brief The mount point of a file system.
466 */
467#define rtems_filesystem_mount_point(_mte) ((_mte)->target)
468
469/**
470 * @brief The device entry of a file system.
471 */
472#define rtems_filesystem_mount_device(_mte) ((_mte)->dev)
473
474/**
475 * @brief File systems options.
476 */
477typedef enum {
478  RTEMS_FILESYSTEM_READ_ONLY,
479  RTEMS_FILESYSTEM_READ_WRITE,
480  RTEMS_FILESYSTEM_BAD_OPTIONS
481} rtems_filesystem_options_t;
482
483/**
484 * @brief An open file data structure.
485 *
486 * It will be indexed by 'fd'.
487 *
488 * @todo Should really have a separate per/file data structure that this points
489 * to (eg: size, offset, driver, pathname should be in that)
490 */
491struct rtems_libio_tt {
492  rtems_driver_name_t                    *driver;
493  rtems_off64_t                           size;      /* size of file */
494  rtems_off64_t                           offset;    /* current offset into file */
495  uint32_t                                flags;
496  rtems_filesystem_location_info_t        pathinfo;
497  rtems_id                                sem;
498  uint32_t                                data0;     /* private to "driver" */
499  void                                   *data1;     /* ... */
500  void                                   *file_info; /* used by file handlers */
501  const rtems_filesystem_file_handlers_r *handlers;  /* type specific handlers */
502};
503
504/**
505 * @brief Paramameter block for read/write.
506 *
507 * It must include 'offset' instead of using iop's offset since we can have
508 * multiple outstanding i/o's on a device.
509 */
510typedef struct {
511  rtems_libio_t          *iop;
512  rtems_off64_t           offset;
513  char                   *buffer;
514  uint32_t                count;
515  uint32_t                flags;
516  uint32_t                bytes_moved;
517} rtems_libio_rw_args_t;
518
519/**
520 * @brief Parameter block for open/close.
521 */
522typedef struct {
523  rtems_libio_t          *iop;
524  uint32_t                flags;
525  uint32_t                mode;
526} rtems_libio_open_close_args_t;
527
528/**
529 * @brief Parameter block for ioctl.
530 */
531typedef struct {
532  rtems_libio_t          *iop;
533  uint32_t                command;
534  void                   *buffer;
535  uint32_t                ioctl_return;
536} rtems_libio_ioctl_args_t;
537
538/**
539 * @name Flag Values
540 *
541 * @{
542 */
543
544#define LIBIO_FLAGS_NO_DELAY      0x0001  /* return immediately if no data */
545#define LIBIO_FLAGS_READ          0x0002  /* reading */
546#define LIBIO_FLAGS_WRITE         0x0004  /* writing */
547#define LIBIO_FLAGS_OPEN          0x0100  /* device is open */
548#define LIBIO_FLAGS_APPEND        0x0200  /* all writes append */
549#define LIBIO_FLAGS_CREATE        0x0400  /* create file */
550#define LIBIO_FLAGS_CLOSE_ON_EXEC 0x0800  /* close on process exec() */
551#define LIBIO_FLAGS_READ_WRITE    (LIBIO_FLAGS_READ | LIBIO_FLAGS_WRITE)
552
553/** @} */
554
555void rtems_libio_init(void);
556
557/**
558 * @name External I/O Handlers
559 *
560 * @{
561 */
562
563typedef int (*rtems_libio_open_t)(
564  const char  *pathname,
565  uint32_t    flag,
566  uint32_t    mode
567);
568
569typedef int (*rtems_libio_close_t)(
570  int  fd
571);
572
573typedef int (*rtems_libio_read_t)(
574  int         fd,
575  void       *buffer,
576  uint32_t    count
577);
578
579typedef int (*rtems_libio_write_t)(
580  int         fd,
581  const void *buffer,
582  uint32_t    count
583);
584
585typedef int (*rtems_libio_ioctl_t)(
586  int         fd,
587  uint32_t    command,
588  void       *buffer
589);
590
591typedef rtems_off64_t (*rtems_libio_lseek_t)(
592  int           fd,
593  rtems_off64_t offset,
594  int           whence
595);
596
597/** @} */
598
599/**
600 * @name Permission Macros
601 *
602 * @{
603 */
604
605/*
606 *  The following macros are used to build up the permissions sets
607 *  used to check permissions.  These are similar in style to the
608 *  mode_t bits and should stay compatible with them.
609 */
610#define RTEMS_LIBIO_PERMS_READ   S_IROTH
611#define RTEMS_LIBIO_PERMS_WRITE  S_IWOTH
612#define RTEMS_LIBIO_PERMS_RDWR   (S_IROTH|S_IWOTH)
613#define RTEMS_LIBIO_PERMS_EXEC   S_IXOTH
614#define RTEMS_LIBIO_PERMS_SEARCH RTEMS_LIBIO_PERMS_EXEC
615#define RTEMS_LIBIO_PERMS_RWX    S_IRWXO
616
617/** @} */
618
619union __rtems_dev_t {
620  dev_t device;
621  struct {
622     rtems_device_major_number major;
623     rtems_device_minor_number minor;
624  } __overlay;
625};
626
627static inline dev_t rtems_filesystem_make_dev_t(
628  rtems_device_major_number _major,
629  rtems_device_minor_number _minor
630)
631{
632  union __rtems_dev_t temp;
633
634  temp.__overlay.major = _major;
635  temp.__overlay.minor = _minor;
636  return temp.device;
637}
638
639static inline rtems_device_major_number rtems_filesystem_dev_major_t(
640  dev_t device
641)
642{
643  union __rtems_dev_t temp;
644
645  temp.device = device;
646  return temp.__overlay.major;
647}
648
649
650static inline rtems_device_minor_number rtems_filesystem_dev_minor_t(
651  dev_t device
652)
653{
654  union __rtems_dev_t temp;
655
656  temp.device = device;
657  return temp.__overlay.minor;
658}
659
660#define rtems_filesystem_split_dev_t( _dev, _major, _minor ) \
661  do { \
662    (_major) = rtems_filesystem_dev_major_t ( _dev ); \
663    (_minor) = rtems_filesystem_dev_minor_t( _dev ); \
664  } while(0)
665
666/*
667 * Verifies that the permission flag is valid.
668 */
669#define rtems_libio_is_valid_perms( _perm )     \
670 (~ ((~RTEMS_LIBIO_PERMS_RWX) & _perm ))
671
672/*
673 *  Prototypes for filesystem
674 */
675
676void rtems_filesystem_initialize( void );
677
678int unmount(
679  const char *mount_path
680);
681
682int mount(
683  const char                 *source,
684  const char                 *target,
685  const char                 *filesystemtype,
686  rtems_filesystem_options_t options,
687  const void                 *data
688);
689
690/*
691 *  Boot Time Mount Table Structure
692 */
693
694typedef struct {
695  const char                              *type;
696  rtems_filesystem_options_t               fsoptions;
697  const char                              *device;
698  const char                              *mount_point;
699} rtems_filesystem_mount_table_t;
700
701extern const rtems_filesystem_mount_table_t *rtems_filesystem_mount_table;
702extern const int                             rtems_filesystem_mount_table_size;
703
704typedef void (*rtems_libio_init_functions_t)(void);
705extern  rtems_libio_init_functions_t rtems_libio_init_helper;
706
707void    open_dev_console(void);
708
709typedef void (*rtems_libio_supp_functions_t)(void);
710extern  rtems_libio_supp_functions_t rtems_libio_supp_helper;
711
712typedef void (*rtems_fs_init_functions_t)(void);
713extern  rtems_fs_init_functions_t    rtems_fs_init_helper;
714
715/**
716 * @brief Creates a directory and all its parrent directories according to
717 * @a path.
718 *
719 * The @a mode value selects the access permissions of the directory.
720 *
721 * @retval 0 Successful operation.
722 * @retval -1 An error occured.  @c errno indicates the error.
723 */
724extern int rtems_mkdir(const char *path, mode_t mode);
725
726/** @} */
727
728/**
729 * @defgroup Termios Termios
730 *
731 * @ingroup LibIO
732 *
733 * @brief Termios
734 *
735 * @{
736 */
737
738typedef struct rtems_termios_callbacks {
739  int    (*firstOpen)(int major, int minor, void *arg);
740  int    (*lastClose)(int major, int minor, void *arg);
741  int    (*pollRead)(int minor);
742  ssize_t (*write)(int minor, const char *buf, size_t len);
743  int    (*setAttributes)(int minor, const struct termios *t);
744  int    (*stopRemoteTx)(int minor);
745  int    (*startRemoteTx)(int minor);
746  int    outputUsesInterrupts;
747} rtems_termios_callbacks;
748
749void rtems_termios_initialize (void);
750
751/*
752 * CCJ: Change before opening a tty. Newer code from Eric is coming
753 * so extra work to handle an open tty is not worth it. If the tty
754 * is open, close then open it again.
755 */
756rtems_status_code rtems_termios_bufsize (
757  int cbufsize,     /* cooked buffer size */
758  int raw_input,    /* raw input buffer size */
759  int raw_output    /* raw output buffer size */
760);
761
762rtems_status_code rtems_termios_open (
763  rtems_device_major_number      major,
764  rtems_device_minor_number      minor,
765  void                          *arg,
766  const rtems_termios_callbacks *callbacks
767);
768
769rtems_status_code rtems_termios_close(
770  void *arg
771);
772
773rtems_status_code rtems_termios_read(
774  void *arg
775);
776
777rtems_status_code rtems_termios_write(
778  void *arg
779);
780
781rtems_status_code rtems_termios_ioctl(
782  void *arg
783);
784
785int rtems_termios_enqueue_raw_characters(
786  void *ttyp,
787  char *buf,
788  int   len
789);
790
791int rtems_termios_dequeue_characters(
792  void *ttyp,
793  int   len
794);
795
796/** @} */
797
798#ifdef __cplusplus
799}
800#endif
801
802#endif /* _RTEMS_LIBIO_H */
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