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/*
* Libio Internal Information
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __LIBIO__h
#define __LIBIO__h
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems.h>
#include <rtems/assoc.h> /* assoc.h not included by rtems.h */
#include <rtems/libio.h>
#include <stdio.h> /* O_RDONLY, et.al. */
#include <fcntl.h> /* O_RDONLY, et.al. */
#include <assert.h>
#include <stdarg.h>
#include <errno.h>
#if ! defined(O_NDELAY)
# if defined(solaris2)
# define O_NDELAY O_NONBLOCK
# elif defined(RTEMS_NEWLIB)
# define O_NDELAY _FNBIO
# endif
#endif
#if !defined(ENOTSUP)
#define ENOTSUP EOPNOTSUPP
#endif
#include <errno.h>
#include <string.h> /* strcmp */
#include <unistd.h>
#include <stdlib.h> /* calloc() */
#include "libio.h" /* libio.h not pulled in by rtems */
/*
* Semaphore to protect the io table
*/
#define RTEMS_LIBIO_SEM rtems_build_name('L', 'B', 'I', 'O')
#define RTEMS_LIBIO_IOP_SEM(n) rtems_build_name('L', 'B', 'I', n)
extern rtems_id rtems_libio_semaphore;
/*
* File descriptor Table Information
*/
extern unsigned32 rtems_libio_number_iops;
extern rtems_libio_t *rtems_libio_iops;
extern rtems_libio_t *rtems_libio_last_iop;
extern rtems_libio_t *rtems_libio_iop_freelist;
/*
* External I/O Handlers Table
*
* Space for all possible handlers is preallocated
* to speed up dispatch to external handlers.
*/
extern rtems_libio_handler_t rtems_libio_handlers[15];
/*
* Default mode for all files.
*/
extern mode_t rtems_filesystem_umask;
/*
* set_errno_and_return_minus_one
*
* Macro to ease common way to return an error.
*/
#ifndef set_errno_and_return_minus_one
#define set_errno_and_return_minus_one( _error ) \
do { errno = (_error); return -1; } while(0)
#endif
/*
* rtems_libio_iop
*
* Macro to return the file descriptor pointer.
*/
#define rtems_libio_iop(_fd) \
((((unsigned32)(_fd)) < rtems_libio_number_iops) ? \
&rtems_libio_iops[_fd] : 0)
/*
* rtems_libio_check_fd
*
* Macro to check if a file descriptor number is valid.
*/
#define rtems_libio_check_fd(_fd) \
do { \
if ((unsigned32) (_fd) >= rtems_libio_number_iops) { \
errno = EBADF; \
return -1; \
} \
} while (0)
/*
* rtems_libio_check_fd
*
* Macro to check if a buffer pointer is valid.
*/
#define rtems_libio_check_buffer(_buffer) \
do { \
if ((_buffer) == 0) { \
errno = EINVAL; \
return -1; \
} \
} while (0)
/*
* rtems_libio_check_count
*
* Macro to check if a count or length is valid.
*/
#define rtems_libio_check_count(_count) \
do { \
if ((_count) == 0) { \
return 0; \
} \
} while (0)
/*
* rtems_libio_check_permissions
*
* Macro to check if a file descriptor is open for this operation.
*/
#define rtems_libio_check_permissions(_iop, _flag) \
do { \
if (((_iop)->flags & (_flag)) == 0) { \
set_errno_and_return_minus_one( EINVAL ); \
return -1; \
} \
} while (0)
/*
* rtems_filesystem_is_separator
*
* Macro to determine if a character is a path name separator.
*
* NOTE: This macro handles MS-DOS and UNIX style names.
*/
#define rtems_filesystem_is_separator( _ch ) \
( ((_ch) == '/') || ((_ch) == '\\') || ((_ch) == '\0'))
/*
* rtems_filesystem_get_start_loc
*
* Macro to determine if path is absolute or relative.
*/
#define rtems_filesystem_get_start_loc( _path, _index, _loc ) \
do { \
if ( rtems_filesystem_is_separator( (_path)[ 0 ] ) ) { \
*(_loc) = rtems_filesystem_root; \
*(_index) = 1; \
} else { \
*(_loc) = rtems_filesystem_current; \
*(_index) = 0; \
} \
} while (0)
#define rtems_filesystem_get_sym_start_loc( _path, _index, _loc ) \
do { \
if ( rtems_filesystem_is_separator( (_path)[ 0 ] ) ) { \
*(_loc) = rtems_filesystem_root; \
*(_index) = 1; \
} else { \
*(_index) = 0; \
} \
} while (0)
/*
* External structures
*/
extern rtems_filesystem_location_info_t rtems_filesystem_current;
extern rtems_filesystem_location_info_t rtems_filesystem_root;
extern nlink_t rtems_filesystem_link_counts;
/*
* File Descriptor Routine Prototypes
*/
rtems_libio_t *rtems_libio_allocate(void);
unsigned32 rtems_libio_fcntl_flags(
unsigned32 fcntl_flags
);
void rtems_libio_free(
rtems_libio_t *iop
);
int rtems_libio_is_open_files_in_fs(
rtems_filesystem_mount_table_entry_t *mt_entry
);
int rtems_libio_is_file_open(
void *node_access
);
/*
* File System Routine Prototypes
*/
int rtems_filesystem_evaluate_path(
const char *pathname,
int flags,
rtems_filesystem_location_info_t *pathloc,
int follow_link
);
void rtems_filesystem_initialize();
int init_fs_mount_table();
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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