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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [libio_.h] - Rev 751
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/* * Libio Internal Information * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * 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: libio_.h,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #ifndef __LIBIO__h #define __LIBIO__h #ifdef __cplusplus extern "C" { #endif #include <rtems.h> #include <rtems/libio.h> /* include before standard IO */ #include <rtems/assoc.h> /* assoc.h not included by rtems.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() */ /* * 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; extern rtems_filesystem_file_handlers_r rtems_filesystem_null_handlers; /* * 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; /* * 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_is_open * * Macro to check if a file descriptor is actually open. */ #define rtems_libio_check_is_open(_iop) \ do { \ if (((_iop)->flags & LIBIO_FLAGS_OPEN) == 0) { \ errno = EBADF; \ return -1; \ } \ } while (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_buffer * * 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_freenode * * Macro to free a node. */ #define rtems_filesystem_freenode( _node ) \ do { \ if ( (_node)->ops->freenod ) \ (*(_node)->ops->freenod)( (_node) ); \ } 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 ); unsigned32 rtems_libio_to_fcntl_flags( unsigned32 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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