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Diffstat (limited to '')
-rw-r--r-- | cpukit/libcsupport/include/rtems/libio_.h | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/cpukit/libcsupport/include/rtems/libio_.h b/cpukit/libcsupport/include/rtems/libio_.h new file mode 100644 index 0000000000..bb6f81f35a --- /dev/null +++ b/cpukit/libcsupport/include/rtems/libio_.h @@ -0,0 +1,248 @@ +/* + * 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> + +#if ! defined(O_NDELAY) +# if defined(solaris2) +# define O_NDELAY O_NONBLOCK +# elif defined(RTEMS_NEWLIB) +# define O_NDELAY _FNBIO +# endif +#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; + +/* + * 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 */ + + + |