forked from Imagelibrary/rtems
87fb080d75
* include/rtems/libio_.h: Added login name, uid, gid, euid, and egid so they can be part of the private environment.
305 lines
8.2 KiB
C
305 lines
8.2 KiB
C
/*
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* Libio Internal Information
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#ifndef __RTEMS_LIBIO_INTERNAL__h
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#define __RTEMS_LIBIO_INTERNAL__h
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <rtems.h>
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#include <rtems/libio.h> /* include before standard IO */
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#include <rtems/assoc.h> /* assoc.h not included by rtems.h */
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#include <sys/types.h>
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#include <stdio.h> /* O_RDONLY, et.al. */
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#include <fcntl.h> /* O_RDONLY, et.al. */
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#include <assert.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <errno.h>
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#if ! defined(O_NDELAY)
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# if defined(solaris2)
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# define O_NDELAY O_NONBLOCK
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# elif defined(RTEMS_NEWLIB)
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# define O_NDELAY _FNBIO
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# endif
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#endif
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#if !defined(ENOTSUP)
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#define ENOTSUP EOPNOTSUPP
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#endif
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#include <errno.h>
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#include <string.h> /* strcmp */
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#include <unistd.h>
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#include <stdlib.h> /* calloc() */
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/*
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* Semaphore to protect the io table
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*/
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#define RTEMS_LIBIO_SEM rtems_build_name('L', 'B', 'I', 'O')
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#define RTEMS_LIBIO_IOP_SEM(n) rtems_build_name('L', 'B', 'I', n)
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extern rtems_id rtems_libio_semaphore;
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extern rtems_filesystem_file_handlers_r rtems_filesystem_null_handlers;
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/*
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* File descriptor Table Information
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*/
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extern unsigned32 rtems_libio_number_iops;
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extern rtems_libio_t *rtems_libio_iops;
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extern rtems_libio_t *rtems_libio_last_iop;
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extern rtems_libio_t *rtems_libio_iop_freelist;
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/*
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* set_errno_and_return_minus_one
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*
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* Macro to ease common way to return an error.
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*/
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#ifndef set_errno_and_return_minus_one
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#define set_errno_and_return_minus_one( _error ) \
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do { errno = (_error); return -1; } while(0)
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#endif
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/*
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* rtems_libio_iop
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*
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* Macro to return the file descriptor pointer.
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*/
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#define rtems_libio_iop(_fd) \
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((((unsigned32)(_fd)) < rtems_libio_number_iops) ? \
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&rtems_libio_iops[_fd] : 0)
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/*
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* rtems_libio_check_is_open
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*
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* Macro to check if a file descriptor is actually open.
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*/
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#define rtems_libio_check_is_open(_iop) \
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do { \
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if (((_iop)->flags & LIBIO_FLAGS_OPEN) == 0) { \
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errno = EBADF; \
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return -1; \
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} \
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} while (0)
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/*
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* rtems_libio_check_fd
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*
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* Macro to check if a file descriptor number is valid.
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*/
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#define rtems_libio_check_fd(_fd) \
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do { \
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if ((unsigned32) (_fd) >= rtems_libio_number_iops) { \
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errno = EBADF; \
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return -1; \
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} \
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} while (0)
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/*
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* rtems_libio_check_buffer
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*
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* Macro to check if a buffer pointer is valid.
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*/
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#define rtems_libio_check_buffer(_buffer) \
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do { \
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if ((_buffer) == 0) { \
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errno = EINVAL; \
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return -1; \
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} \
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} while (0)
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/*
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* rtems_libio_check_count
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*
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* Macro to check if a count or length is valid.
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*/
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#define rtems_libio_check_count(_count) \
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do { \
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if ((_count) == 0) { \
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return 0; \
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} \
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} while (0)
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/*
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* rtems_libio_check_permissions
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*
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* Macro to check if a file descriptor is open for this operation.
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*/
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#define rtems_libio_check_permissions(_iop, _flag) \
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do { \
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if (((_iop)->flags & (_flag)) == 0) { \
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set_errno_and_return_minus_one( EINVAL ); \
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return -1; \
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} \
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} while (0)
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/*
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* rtems_filesystem_freenode
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*
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* Macro to free a node.
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*/
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#define rtems_filesystem_freenode( _node ) \
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do { \
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if ( (_node)->ops->freenod_h ) \
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(*(_node)->ops->freenod_h)( (_node) ); \
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} while (0)
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/*
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* rtems_filesystem_is_separator
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*
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* Macro to determine if a character is a path name separator.
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*
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* NOTE: This macro handles MS-DOS and UNIX style names.
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*/
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#define rtems_filesystem_is_separator( _ch ) \
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( ((_ch) == '/') || ((_ch) == '\\') || ((_ch) == '\0'))
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/*
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* rtems_filesystem_get_start_loc
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*
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* Macro to determine if path is absolute or relative.
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*/
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#define rtems_filesystem_get_start_loc( _path, _index, _loc ) \
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do { \
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if ( rtems_filesystem_is_separator( (_path)[ 0 ] ) ) { \
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*(_loc) = rtems_filesystem_root; \
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*(_index) = 1; \
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} else { \
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*(_loc) = rtems_filesystem_current; \
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*(_index) = 0; \
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} \
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} while (0)
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#define rtems_filesystem_get_sym_start_loc( _path, _index, _loc ) \
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do { \
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if ( rtems_filesystem_is_separator( (_path)[ 0 ] ) ) { \
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*(_loc) = rtems_filesystem_root; \
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*(_index) = 1; \
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} else { \
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*(_index) = 0; \
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} \
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} while (0)
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/*
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* External structures
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*/
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typedef struct {
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rtems_id task_id;
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rtems_filesystem_location_info_t current_directory;
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rtems_filesystem_location_info_t root_directory;
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/* Default mode for all files. */
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mode_t umask;
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nlink_t link_counts;
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/* _POSIX_types */
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uid_t uid;
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gid_t gid;
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uid_t euid;
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gid_t egid;
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char login_buffer[LOGIN_NAME_MAX];
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pid_t pgrp; /* process group id */
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} rtems_user_env_t;
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extern rtems_user_env_t * rtems_current_user_env;
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extern rtems_user_env_t rtems_global_user_env;
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#define rtems_filesystem_current (rtems_current_user_env->current_directory)
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#define rtems_filesystem_root (rtems_current_user_env->root_directory)
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#define rtems_filesystem_link_counts (rtems_current_user_env->link_counts)
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#define rtems_filesystem_umask (rtems_current_user_env->umask)
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#define _POSIX_types_Uid (rtems_current_user_env->uid)
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#define _POSIX_types_Gid (rtems_current_user_env->gid)
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#define _POSIX_types_Euid (rtems_current_user_env->euid)
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#define _POSIX_types_Egid (rtems_current_user_env->egid)
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#define _POSIX_types_Getlogin_buffer (rtems_current_user_env->login_buffer)
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/*
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* Instantiate a private copy of the per user information for the calling task.
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*/
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rtems_status_code rtems_libio_set_private_env(void);
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rtems_status_code rtems_libio_share_private_env(rtems_id task_id) ;
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/*
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* File Descriptor Routine Prototypes
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*/
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rtems_libio_t *rtems_libio_allocate(void);
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unsigned32 rtems_libio_fcntl_flags(
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unsigned32 fcntl_flags
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);
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unsigned32 rtems_libio_to_fcntl_flags(
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unsigned32 flags
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);
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void rtems_libio_free(
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rtems_libio_t *iop
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);
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int rtems_libio_is_open_files_in_fs(
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rtems_filesystem_mount_table_entry_t *mt_entry
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);
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int rtems_libio_is_file_open(
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void *node_access
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);
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/*
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* File System Routine Prototypes
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*/
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int rtems_filesystem_evaluate_path(
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const char *pathname,
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int flags,
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rtems_filesystem_location_info_t *pathloc,
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int follow_link
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);
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void rtems_filesystem_initialize();
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int init_fs_mount_table();
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#ifdef __cplusplus
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}
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#endif
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#endif
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/* end of include file */
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