[4d3017a] | 1 | /** |
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[615d8cc] | 2 | * @file |
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| 3 | * |
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| 4 | * @ingroup LibIO |
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| 5 | * |
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| 6 | * @brief Basic IO API. |
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[4d3017a] | 7 | */ |
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| 8 | |
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[b06e68ef] | 9 | /* |
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[ad78965d] | 10 | * COPYRIGHT (c) 1989-2008. |
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[07a3253d] | 11 | * On-Line Applications Research Corporation (OAR). |
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| 12 | * |
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| 13 | * The license and distribution terms for this file may be |
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| 14 | * found in the file LICENSE in this distribution or at |
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[0eae36c7] | 15 | * http://www.rtems.com/license/LICENSE. |
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[b06e68ef] | 16 | * |
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| 17 | * $Id$ |
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| 18 | */ |
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| 19 | |
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[7945944] | 20 | #ifndef _RTEMS_RTEMS_LIBIO_H |
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| 21 | #define _RTEMS_RTEMS_LIBIO_H |
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[b06e68ef] | 22 | |
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[7a3878b] | 23 | #include <sys/types.h> |
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[dcec5a4] | 24 | #include <sys/stat.h> |
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[9b05600] | 25 | #include <sys/ioctl.h> |
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[eb649786] | 26 | #include <sys/statvfs.h> |
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[dcec5a4] | 27 | |
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[615d8cc] | 28 | #include <unistd.h> |
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| 29 | #include <termios.h> |
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[07a3253d] | 30 | |
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[615d8cc] | 31 | #include <rtems.h> |
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[d09ad1f0] | 32 | #include <rtems/fs.h> |
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[615d8cc] | 33 | #include <rtems/chain.h> |
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[07a3253d] | 34 | |
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[80c2966] | 35 | #ifdef __cplusplus |
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| 36 | extern "C" { |
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| 37 | #endif |
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| 38 | |
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[615d8cc] | 39 | /** |
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| 40 | * @defgroup LibIO IO Library |
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| 41 | * |
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| 42 | * @brief Provides system call and file system interface definitions. |
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| 43 | * |
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| 44 | * General purpose communication channel for RTEMS to allow UNIX/POSIX |
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| 45 | * system call behavior under RTEMS. Initially this supported only |
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| 46 | * IO to devices but has since been enhanced to support networking |
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| 47 | * and support for mounted file systems. |
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| 48 | * |
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| 49 | * @{ |
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| 50 | */ |
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| 51 | |
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| 52 | /** |
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| 53 | * @brief A 64-bit file offset for internal use by RTEMS. Based on the Newlib |
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| 54 | * type. |
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[07d6fd5] | 55 | */ |
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| 56 | typedef _off64_t rtems_off64_t; |
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| 57 | |
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[615d8cc] | 58 | /** |
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[3d3a18e6] | 59 | * @name File System Node Types |
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[615d8cc] | 60 | * |
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| 61 | * @{ |
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[07a3253d] | 62 | */ |
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[615d8cc] | 63 | |
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[a1f1011] | 64 | #define RTEMS_FILESYSTEM_DIRECTORY 1 |
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| 65 | #define RTEMS_FILESYSTEM_DEVICE 2 |
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| 66 | #define RTEMS_FILESYSTEM_HARD_LINK 3 |
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| 67 | #define RTEMS_FILESYSTEM_SYM_LINK 4 |
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| 68 | #define RTEMS_FILESYSTEM_MEMORY_FILE 5 |
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[615d8cc] | 69 | |
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| 70 | /** @} */ |
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| 71 | |
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[a1f1011] | 72 | typedef int rtems_filesystem_node_types_t; |
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[07a3253d] | 73 | |
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[615d8cc] | 74 | /** |
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| 75 | * @name File System Node Operations |
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| 76 | * |
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| 77 | * @{ |
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[07a3253d] | 78 | */ |
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[615d8cc] | 79 | |
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[07a3253d] | 80 | typedef int (*rtems_filesystem_open_t)( |
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| 81 | rtems_libio_t *iop, |
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| 82 | const char *pathname, |
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[83c5fc1] | 83 | uint32_t flag, |
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| 84 | uint32_t mode |
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[07a3253d] | 85 | ); |
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| 86 | |
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| 87 | typedef int (*rtems_filesystem_close_t)( |
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| 88 | rtems_libio_t *iop |
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| 89 | ); |
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| 90 | |
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[5d0b2f7] | 91 | typedef ssize_t (*rtems_filesystem_read_t)( |
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[07a3253d] | 92 | rtems_libio_t *iop, |
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| 93 | void *buffer, |
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[7192476f] | 94 | size_t count |
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[07a3253d] | 95 | ); |
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| 96 | |
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[5d0b2f7] | 97 | typedef ssize_t (*rtems_filesystem_write_t)( |
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[07a3253d] | 98 | rtems_libio_t *iop, |
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| 99 | const void *buffer, |
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[7192476f] | 100 | size_t count |
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[07a3253d] | 101 | ); |
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| 102 | |
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| 103 | typedef int (*rtems_filesystem_ioctl_t)( |
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| 104 | rtems_libio_t *iop, |
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[83c5fc1] | 105 | uint32_t command, |
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[07a3253d] | 106 | void *buffer |
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| 107 | ); |
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| 108 | |
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[07d6fd5] | 109 | typedef rtems_off64_t (*rtems_filesystem_lseek_t)( |
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[07a3253d] | 110 | rtems_libio_t *iop, |
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[07d6fd5] | 111 | rtems_off64_t length, |
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[07a3253d] | 112 | int whence |
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| 113 | ); |
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| 114 | |
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| 115 | typedef int (*rtems_filesystem_fstat_t)( |
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| 116 | rtems_filesystem_location_info_t *loc, |
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| 117 | struct stat *buf |
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| 118 | ); |
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| 119 | |
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| 120 | typedef int (*rtems_filesystem_fchmod_t)( |
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| 121 | rtems_filesystem_location_info_t *loc, |
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| 122 | mode_t mode |
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| 123 | ); |
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| 124 | |
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| 125 | typedef int (*rtems_filesystem_ftruncate_t)( |
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| 126 | rtems_libio_t *iop, |
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[07d6fd5] | 127 | rtems_off64_t length |
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[07a3253d] | 128 | ); |
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| 129 | |
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| 130 | typedef int (*rtems_filesystem_fpathconf_t)( |
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| 131 | rtems_libio_t *iop, |
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| 132 | int name |
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| 133 | ); |
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| 134 | |
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| 135 | typedef int (*rtems_filesystem_fsync_t)( |
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| 136 | rtems_libio_t *iop |
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| 137 | ); |
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| 138 | |
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| 139 | typedef int (*rtems_filesystem_fdatasync_t)( |
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| 140 | rtems_libio_t *iop |
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| 141 | ); |
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| 142 | |
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[af020036] | 143 | typedef int (*rtems_filesystem_fcntl_t)( |
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[e2116f9] | 144 | int cmd, |
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[af020036] | 145 | rtems_libio_t *iop |
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| 146 | ); |
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| 147 | |
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[4a07d2b] | 148 | typedef int (*rtems_filesystem_rmnod_t)( |
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[7baa484] | 149 | rtems_filesystem_location_info_t *parent_loc, /* IN */ |
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[4a07d2b] | 150 | rtems_filesystem_location_info_t *pathloc /* IN */ |
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| 151 | ); |
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| 152 | |
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[615d8cc] | 153 | /** @} */ |
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| 154 | |
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| 155 | /** |
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| 156 | * @brief File system node operations table. |
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| 157 | */ |
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[d09ad1f0] | 158 | struct _rtems_filesystem_file_handlers_r { |
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[9c3fa30] | 159 | rtems_filesystem_open_t open_h; |
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| 160 | rtems_filesystem_close_t close_h; |
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| 161 | rtems_filesystem_read_t read_h; |
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| 162 | rtems_filesystem_write_t write_h; |
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| 163 | rtems_filesystem_ioctl_t ioctl_h; |
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| 164 | rtems_filesystem_lseek_t lseek_h; |
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| 165 | rtems_filesystem_fstat_t fstat_h; |
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| 166 | rtems_filesystem_fchmod_t fchmod_h; |
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| 167 | rtems_filesystem_ftruncate_t ftruncate_h; |
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| 168 | rtems_filesystem_fpathconf_t fpathconf_h; |
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| 169 | rtems_filesystem_fsync_t fsync_h; |
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| 170 | rtems_filesystem_fdatasync_t fdatasync_h; |
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| 171 | rtems_filesystem_fcntl_t fcntl_h; |
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| 172 | rtems_filesystem_rmnod_t rmnod_h; |
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[d09ad1f0] | 173 | }; |
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[07a3253d] | 174 | |
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[615d8cc] | 175 | /** |
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| 176 | * @name File System Operations |
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| 177 | * |
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| 178 | * @{ |
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[07a3253d] | 179 | */ |
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| 180 | |
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| 181 | /* |
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| 182 | * XXX |
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[50f32b11] | 183 | * This routine does not allocate any space and rtems_filesystem_freenode_t |
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[07a3253d] | 184 | * is not called by the generic after calling this routine. |
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[50f32b11] | 185 | * ie. node_access does not have to contain valid data when the |
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[07a3253d] | 186 | * routine returns. |
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| 187 | */ |
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| 188 | typedef int (*rtems_filesystem_mknod_t)( |
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| 189 | const char *path, /* IN */ |
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| 190 | mode_t mode, /* IN */ |
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| 191 | dev_t dev, /* IN */ |
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| 192 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
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| 193 | ); |
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| 194 | |
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| 195 | /* |
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| 196 | * rtems_filesystem_freenode_t must be called by the generic after |
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| 197 | * calling this routine |
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| 198 | */ |
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| 199 | |
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| 200 | typedef int (*rtems_filesystem_evalpath_t)( |
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| 201 | const char *pathname, /* IN */ |
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[fb1b349] | 202 | size_t pathnamelen, /* IN */ |
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[07a3253d] | 203 | int flags, /* IN */ |
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| 204 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
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| 205 | ); |
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| 206 | |
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| 207 | typedef int (*rtems_filesystem_evalmake_t)( |
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| 208 | const char *path, /* IN */ |
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| 209 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
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| 210 | const char **name /* OUT */ |
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| 211 | ); |
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| 212 | |
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| 213 | typedef int (*rtems_filesystem_link_t)( |
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| 214 | rtems_filesystem_location_info_t *to_loc, /* IN */ |
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| 215 | rtems_filesystem_location_info_t *parent_loc, /* IN */ |
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| 216 | const char *name /* IN */ |
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| 217 | ); |
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| 218 | |
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| 219 | typedef int (*rtems_filesystem_unlink_t)( |
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[7baa484] | 220 | rtems_filesystem_location_info_t *parent_pathloc, /* IN */ |
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| 221 | rtems_filesystem_location_info_t *pathloc /* IN */ |
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[07a3253d] | 222 | ); |
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| 223 | |
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| 224 | typedef int (*rtems_filesystem_chown_t)( |
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| 225 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
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| 226 | uid_t owner, /* IN */ |
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| 227 | gid_t group /* IN */ |
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| 228 | ); |
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| 229 | |
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| 230 | typedef int (*rtems_filesystem_freenode_t)( |
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| 231 | rtems_filesystem_location_info_t *pathloc /* IN */ |
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| 232 | ); |
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| 233 | |
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| 234 | typedef int (* rtems_filesystem_mount_t ) ( |
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[29e92b0] | 235 | rtems_filesystem_mount_table_entry_t *mt_entry /* IN */ |
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[07a3253d] | 236 | ); |
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| 237 | |
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| 238 | typedef int (* rtems_filesystem_fsmount_me_t )( |
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[29e92b0] | 239 | rtems_filesystem_mount_table_entry_t *mt_entry, /* IN */ |
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| 240 | const void *data /* IN */ |
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[07a3253d] | 241 | ); |
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| 242 | |
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| 243 | typedef int (* rtems_filesystem_unmount_t ) ( |
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[29e92b0] | 244 | rtems_filesystem_mount_table_entry_t *mt_entry /* IN */ |
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[07a3253d] | 245 | ); |
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| 246 | |
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| 247 | typedef int (* rtems_filesystem_fsunmount_me_t ) ( |
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[29e92b0] | 248 | rtems_filesystem_mount_table_entry_t *mt_entry /* IN */ |
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[07a3253d] | 249 | ); |
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| 250 | |
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| 251 | typedef rtems_filesystem_node_types_t (* rtems_filesystem_node_type_t) ( |
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[29e92b0] | 252 | rtems_filesystem_location_info_t *pathloc /* IN */ |
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[07a3253d] | 253 | ); |
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| 254 | |
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| 255 | typedef int (* rtems_filesystem_utime_t)( |
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| 256 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
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| 257 | time_t actime, /* IN */ |
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| 258 | time_t modtime /* IN */ |
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| 259 | ); |
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| 260 | |
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| 261 | typedef int (*rtems_filesystem_evaluate_link_t)( |
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| 262 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
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| 263 | int flags /* IN */ |
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| 264 | ); |
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| 265 | |
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| 266 | typedef int (*rtems_filesystem_symlink_t)( |
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| 267 | rtems_filesystem_location_info_t *loc, /* IN */ |
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| 268 | const char *link_name, /* IN */ |
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| 269 | const char *node_name |
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| 270 | ); |
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| 271 | |
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| 272 | typedef int (*rtems_filesystem_readlink_t)( |
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[50f32b11] | 273 | rtems_filesystem_location_info_t *loc, /* IN */ |
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| 274 | char *buf, /* OUT */ |
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| 275 | size_t bufsize |
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[07a3253d] | 276 | ); |
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| 277 | |
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[8ec7abb] | 278 | typedef int (*rtems_filesystem_rename_t)( |
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| 279 | rtems_filesystem_location_info_t *old_parent_loc, /* IN */ |
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| 280 | rtems_filesystem_location_info_t *old_loc, /* IN */ |
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| 281 | rtems_filesystem_location_info_t *new_parent_loc, /* IN */ |
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| 282 | const char *name /* IN */ |
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| 283 | ); |
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| 284 | |
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[eb649786] | 285 | typedef int (*rtems_filesystem_statvfs_t)( |
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| 286 | rtems_filesystem_location_info_t *loc, /* IN */ |
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| 287 | struct statvfs *buf /* OUT */ |
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| 288 | ); |
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| 289 | |
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[615d8cc] | 290 | /** @} */ |
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[07a3253d] | 291 | |
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[615d8cc] | 292 | /** |
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| 293 | * @brief File system operations table. |
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[07a3253d] | 294 | */ |
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[d09ad1f0] | 295 | struct _rtems_filesystem_operations_table { |
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[9c3fa30] | 296 | rtems_filesystem_evalpath_t evalpath_h; |
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| 297 | rtems_filesystem_evalmake_t evalformake_h; |
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| 298 | rtems_filesystem_link_t link_h; |
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| 299 | rtems_filesystem_unlink_t unlink_h; |
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| 300 | rtems_filesystem_node_type_t node_type_h; |
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| 301 | rtems_filesystem_mknod_t mknod_h; |
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| 302 | rtems_filesystem_chown_t chown_h; |
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| 303 | rtems_filesystem_freenode_t freenod_h; |
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| 304 | rtems_filesystem_mount_t mount_h; |
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| 305 | rtems_filesystem_fsmount_me_t fsmount_me_h; |
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| 306 | rtems_filesystem_unmount_t unmount_h; |
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| 307 | rtems_filesystem_fsunmount_me_t fsunmount_me_h; |
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| 308 | rtems_filesystem_utime_t utime_h; |
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| 309 | rtems_filesystem_evaluate_link_t eval_link_h; |
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| 310 | rtems_filesystem_symlink_t symlink_h; |
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| 311 | rtems_filesystem_readlink_t readlink_h; |
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[8ec7abb] | 312 | rtems_filesystem_rename_t rename_h; |
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[eb649786] | 313 | rtems_filesystem_statvfs_t statvfs_h; |
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[d09ad1f0] | 314 | }; |
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| 315 | |
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[00bf6744] | 316 | /** |
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[615d8cc] | 317 | * @brief Gets the mount handler for the file system @a type. |
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| 318 | * |
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| 319 | * @return The file system mount handler associated with the @a type, or |
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[00bf6744] | 320 | * @c NULL if no such association exists. |
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[29e92b0] | 321 | */ |
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[00bf6744] | 322 | rtems_filesystem_fsmount_me_t |
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| 323 | rtems_filesystem_get_mount_handler( |
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| 324 | const char *type |
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| 325 | ); |
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[29e92b0] | 326 | |
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[615d8cc] | 327 | /** |
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| 328 | * @brief Contain file system specific information which is required to support |
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| 329 | * fpathconf(). |
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[b06e68ef] | 330 | */ |
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| 331 | typedef struct { |
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[29e92b0] | 332 | int link_max; /* count */ |
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| 333 | int max_canon; /* max formatted input line size */ |
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| 334 | int max_input; /* max input line size */ |
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| 335 | int name_max; /* max name length */ |
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| 336 | int path_max; /* max path */ |
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| 337 | int pipe_buf; /* pipe buffer size */ |
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| 338 | int posix_async_io; /* async IO supported on fs, 0=no, 1=yes */ |
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| 339 | int posix_chown_restrictions; /* can chown: 0=no, 1=yes */ |
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| 340 | int posix_no_trunc; /* error on names > max name, 0=no, 1=yes */ |
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| 341 | int posix_prio_io; /* priority IO, 0=no, 1=yes */ |
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| 342 | int posix_sync_io; /* file can be sync'ed, 0=no, 1=yes */ |
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| 343 | int posix_vdisable; /* special char processing, 0=no, 1=yes */ |
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[07a3253d] | 344 | } rtems_filesystem_limits_and_options_t; |
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| 345 | |
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[615d8cc] | 346 | /** |
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| 347 | * @brief Default pathconf settings. |
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| 348 | * |
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| 349 | * Override in a filesystem. |
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[29e92b0] | 350 | */ |
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| 351 | extern const rtems_filesystem_limits_and_options_t rtems_filesystem_default_pathconf; |
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| 352 | |
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[615d8cc] | 353 | /** |
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| 354 | * @brief An open file data structure. |
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| 355 | * |
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| 356 | * It will be indexed by 'fd'. |
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| 357 | * |
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| 358 | * @todo Should really have a separate per/file data structure that this points |
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| 359 | * to (eg: size, offset, driver, pathname should be in that) |
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[07a3253d] | 360 | */ |
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| 361 | struct rtems_libio_tt { |
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[aa61d53] | 362 | rtems_driver_name_t *driver; |
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| 363 | rtems_off64_t size; /* size of file */ |
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| 364 | rtems_off64_t offset; /* current offset into file */ |
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| 365 | uint32_t flags; |
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| 366 | rtems_filesystem_location_info_t pathinfo; |
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| 367 | rtems_id sem; |
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| 368 | uint32_t data0; /* private to "driver" */ |
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| 369 | void *data1; /* ... */ |
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| 370 | void *file_info; /* used by file handlers */ |
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| 371 | const rtems_filesystem_file_handlers_r *handlers; /* type specific handlers */ |
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[07a3253d] | 372 | }; |
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| 373 | |
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[615d8cc] | 374 | /** |
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| 375 | * @brief Paramameter block for read/write. |
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| 376 | * |
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| 377 | * It must include 'offset' instead of using iop's offset since we can have |
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| 378 | * multiple outstanding i/o's on a device. |
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[b06e68ef] | 379 | */ |
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| 380 | typedef struct { |
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[aa61d53] | 381 | rtems_libio_t *iop; |
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| 382 | rtems_off64_t offset; |
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| 383 | char *buffer; |
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| 384 | uint32_t count; |
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| 385 | uint32_t flags; |
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| 386 | uint32_t bytes_moved; |
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[b06e68ef] | 387 | } rtems_libio_rw_args_t; |
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| 388 | |
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[615d8cc] | 389 | /** |
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| 390 | * @brief Parameter block for open/close. |
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[b06e68ef] | 391 | */ |
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| 392 | typedef struct { |
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[aa61d53] | 393 | rtems_libio_t *iop; |
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| 394 | uint32_t flags; |
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| 395 | uint32_t mode; |
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[b06e68ef] | 396 | } rtems_libio_open_close_args_t; |
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| 397 | |
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[615d8cc] | 398 | /** |
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| 399 | * @brief Parameter block for ioctl. |
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[b06e68ef] | 400 | */ |
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| 401 | typedef struct { |
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[aa61d53] | 402 | rtems_libio_t *iop; |
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| 403 | uint32_t command; |
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| 404 | void *buffer; |
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| 405 | uint32_t ioctl_return; |
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[b06e68ef] | 406 | } rtems_libio_ioctl_args_t; |
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| 407 | |
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[615d8cc] | 408 | /** |
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| 409 | * @name Flag Values |
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| 410 | * |
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| 411 | * @{ |
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[b06e68ef] | 412 | */ |
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[615d8cc] | 413 | |
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[b06e68ef] | 414 | #define LIBIO_FLAGS_NO_DELAY 0x0001 /* return immediately if no data */ |
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| 415 | #define LIBIO_FLAGS_READ 0x0002 /* reading */ |
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| 416 | #define LIBIO_FLAGS_WRITE 0x0004 /* writing */ |
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| 417 | #define LIBIO_FLAGS_OPEN 0x0100 /* device is open */ |
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| 418 | #define LIBIO_FLAGS_APPEND 0x0200 /* all writes append */ |
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| 419 | #define LIBIO_FLAGS_CREATE 0x0400 /* create file */ |
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[07a3253d] | 420 | #define LIBIO_FLAGS_CLOSE_ON_EXEC 0x0800 /* close on process exec() */ |
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[b06e68ef] | 421 | #define LIBIO_FLAGS_READ_WRITE (LIBIO_FLAGS_READ | LIBIO_FLAGS_WRITE) |
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| 422 | |
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[615d8cc] | 423 | /** @} */ |
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| 424 | |
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[07a3253d] | 425 | void rtems_libio_init(void); |
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[b06e68ef] | 426 | |
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[615d8cc] | 427 | /** |
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| 428 | * @name External I/O Handlers |
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| 429 | * |
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| 430 | * @{ |
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[e2d79559] | 431 | */ |
---|
[07a3253d] | 432 | |
---|
| 433 | typedef int (*rtems_libio_open_t)( |
---|
| 434 | const char *pathname, |
---|
[83c5fc1] | 435 | uint32_t flag, |
---|
| 436 | uint32_t mode |
---|
[07a3253d] | 437 | ); |
---|
| 438 | |
---|
| 439 | typedef int (*rtems_libio_close_t)( |
---|
| 440 | int fd |
---|
| 441 | ); |
---|
| 442 | |
---|
| 443 | typedef int (*rtems_libio_read_t)( |
---|
| 444 | int fd, |
---|
| 445 | void *buffer, |
---|
[83c5fc1] | 446 | uint32_t count |
---|
[07a3253d] | 447 | ); |
---|
| 448 | |
---|
| 449 | typedef int (*rtems_libio_write_t)( |
---|
| 450 | int fd, |
---|
| 451 | const void *buffer, |
---|
[83c5fc1] | 452 | uint32_t count |
---|
[07a3253d] | 453 | ); |
---|
| 454 | |
---|
| 455 | typedef int (*rtems_libio_ioctl_t)( |
---|
| 456 | int fd, |
---|
[83c5fc1] | 457 | uint32_t command, |
---|
[07a3253d] | 458 | void *buffer |
---|
| 459 | ); |
---|
| 460 | |
---|
[07d6fd5] | 461 | typedef rtems_off64_t (*rtems_libio_lseek_t)( |
---|
| 462 | int fd, |
---|
| 463 | rtems_off64_t offset, |
---|
| 464 | int whence |
---|
[07a3253d] | 465 | ); |
---|
| 466 | |
---|
[615d8cc] | 467 | /** @} */ |
---|
| 468 | |
---|
| 469 | /** |
---|
| 470 | * @name Permission Macros |
---|
| 471 | * |
---|
| 472 | * @{ |
---|
| 473 | */ |
---|
| 474 | |
---|
[07a3253d] | 475 | /* |
---|
| 476 | * The following macros are used to build up the permissions sets |
---|
| 477 | * used to check permissions. These are similar in style to the |
---|
| 478 | * mode_t bits and should stay compatible with them. |
---|
| 479 | */ |
---|
| 480 | #define RTEMS_LIBIO_PERMS_READ S_IROTH |
---|
| 481 | #define RTEMS_LIBIO_PERMS_WRITE S_IWOTH |
---|
| 482 | #define RTEMS_LIBIO_PERMS_RDWR (S_IROTH|S_IWOTH) |
---|
| 483 | #define RTEMS_LIBIO_PERMS_EXEC S_IXOTH |
---|
| 484 | #define RTEMS_LIBIO_PERMS_SEARCH RTEMS_LIBIO_PERMS_EXEC |
---|
| 485 | #define RTEMS_LIBIO_PERMS_RWX S_IRWXO |
---|
| 486 | |
---|
[615d8cc] | 487 | /** @} */ |
---|
[7e476f0] | 488 | |
---|
[0b178f04] | 489 | union __rtems_dev_t { |
---|
[7e476f0] | 490 | dev_t device; |
---|
| 491 | struct { |
---|
| 492 | rtems_device_major_number major; |
---|
| 493 | rtems_device_minor_number minor; |
---|
| 494 | } __overlay; |
---|
| 495 | }; |
---|
| 496 | |
---|
[50f32b11] | 497 | static inline dev_t rtems_filesystem_make_dev_t( |
---|
| 498 | rtems_device_major_number _major, |
---|
[7e476f0] | 499 | rtems_device_minor_number _minor |
---|
| 500 | ) |
---|
| 501 | { |
---|
[0b178f04] | 502 | union __rtems_dev_t temp; |
---|
[7e476f0] | 503 | |
---|
| 504 | temp.__overlay.major = _major; |
---|
| 505 | temp.__overlay.minor = _minor; |
---|
| 506 | return temp.device; |
---|
| 507 | } |
---|
| 508 | |
---|
| 509 | static inline rtems_device_major_number rtems_filesystem_dev_major_t( |
---|
| 510 | dev_t device |
---|
| 511 | ) |
---|
| 512 | { |
---|
[0b178f04] | 513 | union __rtems_dev_t temp; |
---|
[7e476f0] | 514 | |
---|
| 515 | temp.device = device; |
---|
| 516 | return temp.__overlay.major; |
---|
| 517 | } |
---|
| 518 | |
---|
| 519 | |
---|
| 520 | static inline rtems_device_minor_number rtems_filesystem_dev_minor_t( |
---|
| 521 | dev_t device |
---|
| 522 | ) |
---|
| 523 | { |
---|
[0b178f04] | 524 | union __rtems_dev_t temp; |
---|
[7e476f0] | 525 | |
---|
| 526 | temp.device = device; |
---|
| 527 | return temp.__overlay.minor; |
---|
| 528 | } |
---|
| 529 | |
---|
[07a3253d] | 530 | #define rtems_filesystem_split_dev_t( _dev, _major, _minor ) \ |
---|
| 531 | do { \ |
---|
[dd19c0b] | 532 | (_major) = rtems_filesystem_dev_major_t ( _dev ); \ |
---|
| 533 | (_minor) = rtems_filesystem_dev_minor_t( _dev ); \ |
---|
[07a3253d] | 534 | } while(0) |
---|
| 535 | |
---|
| 536 | /* |
---|
| 537 | * Verifies that the permission flag is valid. |
---|
| 538 | */ |
---|
| 539 | #define rtems_libio_is_valid_perms( _perm ) \ |
---|
| 540 | (~ ((~RTEMS_LIBIO_PERMS_RWX) & _perm )) |
---|
| 541 | |
---|
[955a34b5] | 542 | /* |
---|
| 543 | * Prototypes for filesystem |
---|
| 544 | */ |
---|
| 545 | |
---|
| 546 | void rtems_filesystem_initialize( void ); |
---|
| 547 | |
---|
| 548 | typedef void (*rtems_libio_init_functions_t)(void); |
---|
| 549 | extern rtems_libio_init_functions_t rtems_libio_init_helper; |
---|
| 550 | |
---|
| 551 | void open_dev_console(void); |
---|
| 552 | |
---|
| 553 | typedef void (*rtems_libio_supp_functions_t)(void); |
---|
| 554 | extern rtems_libio_supp_functions_t rtems_libio_supp_helper; |
---|
| 555 | |
---|
| 556 | typedef void (*rtems_fs_init_functions_t)(void); |
---|
| 557 | extern rtems_fs_init_functions_t rtems_fs_init_helper; |
---|
| 558 | |
---|
| 559 | /** |
---|
| 560 | * @brief Creates a directory and all its parent directories according to |
---|
| 561 | * @a path. |
---|
| 562 | * |
---|
| 563 | * The @a mode value selects the access permissions of the directory. |
---|
| 564 | * |
---|
| 565 | * @retval 0 Successful operation. |
---|
| 566 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
| 567 | */ |
---|
| 568 | extern int rtems_mkdir(const char *path, mode_t mode); |
---|
| 569 | |
---|
| 570 | /** @} */ |
---|
| 571 | |
---|
| 572 | /** |
---|
| 573 | * @defgroup FileSystemTypesAndMount File System Types and Mount |
---|
| 574 | * |
---|
| 575 | * @ingroup LibIO |
---|
| 576 | * |
---|
| 577 | * @brief File system types and mount. |
---|
| 578 | * |
---|
| 579 | * @{ |
---|
| 580 | */ |
---|
| 581 | |
---|
[3d3a18e6] | 582 | /** |
---|
| 583 | * @name File System Types |
---|
| 584 | * |
---|
| 585 | * @{ |
---|
| 586 | */ |
---|
| 587 | |
---|
| 588 | #define RTEMS_FILESYSTEM_TYPE_IMFS "imfs" |
---|
| 589 | #define RTEMS_FILESYSTEM_TYPE_MINIIMFS "mimfs" |
---|
| 590 | #define RTEMS_FILESYSTEM_TYPE_DEVFS "devfs" |
---|
| 591 | #define RTEMS_FILESYSTEM_TYPE_FTPFS "ftpfs" |
---|
| 592 | #define RTEMS_FILESYSTEM_TYPE_TFTPFS "tftpfs" |
---|
| 593 | #define RTEMS_FILESYSTEM_TYPE_NFS "nfs" |
---|
| 594 | #define RTEMS_FILESYSTEM_TYPE_DOSFS "dosfs" |
---|
| 595 | #define RTEMS_FILESYSTEM_TYPE_RFS "rfs" |
---|
| 596 | |
---|
| 597 | /** @} */ |
---|
| 598 | |
---|
[955a34b5] | 599 | /** |
---|
| 600 | * @brief Mount table entry. |
---|
[07a3253d] | 601 | */ |
---|
[955a34b5] | 602 | struct rtems_filesystem_mount_table_entry_tt { |
---|
| 603 | rtems_chain_node Node; |
---|
| 604 | rtems_filesystem_location_info_t mt_point_node; |
---|
| 605 | rtems_filesystem_location_info_t mt_fs_root; |
---|
| 606 | int options; |
---|
| 607 | void *fs_info; |
---|
[07a3253d] | 608 | |
---|
[955a34b5] | 609 | rtems_filesystem_limits_and_options_t pathconf_limits_and_options; |
---|
| 610 | |
---|
| 611 | /* |
---|
| 612 | * The target or mount point of the file system. |
---|
| 613 | */ |
---|
| 614 | const char *target; |
---|
| 615 | |
---|
| 616 | /* |
---|
| 617 | * The type of filesystem or the name of the filesystem. |
---|
| 618 | */ |
---|
| 619 | const char *type; |
---|
| 620 | |
---|
| 621 | /* |
---|
| 622 | * When someone adds a mounted filesystem on a real device, |
---|
| 623 | * this will need to be used. |
---|
| 624 | * |
---|
| 625 | * The lower layers can manage how this is managed. Leave as a |
---|
| 626 | * string. |
---|
| 627 | */ |
---|
| 628 | char *dev; |
---|
| 629 | }; |
---|
[07a3253d] | 630 | |
---|
[955a34b5] | 631 | /** |
---|
| 632 | * @brief File system options. |
---|
| 633 | */ |
---|
| 634 | typedef enum { |
---|
| 635 | RTEMS_FILESYSTEM_READ_ONLY, |
---|
| 636 | RTEMS_FILESYSTEM_READ_WRITE, |
---|
| 637 | RTEMS_FILESYSTEM_BAD_OPTIONS |
---|
| 638 | } rtems_filesystem_options_t; |
---|
| 639 | |
---|
| 640 | /** |
---|
| 641 | * @brief File system table entry. |
---|
| 642 | */ |
---|
| 643 | typedef struct rtems_filesystem_table_t { |
---|
| 644 | const char *type; |
---|
| 645 | rtems_filesystem_fsmount_me_t mount_h; |
---|
| 646 | } rtems_filesystem_table_t; |
---|
| 647 | |
---|
| 648 | /** |
---|
| 649 | * @brief Static table of file systems. |
---|
| 650 | * |
---|
| 651 | * Externally defined by confdefs.h or the user. |
---|
| 652 | */ |
---|
| 653 | extern const rtems_filesystem_table_t rtems_filesystem_table []; |
---|
| 654 | |
---|
| 655 | /** |
---|
| 656 | * @brief Registers a file system @a type. |
---|
| 657 | * |
---|
| 658 | * The @a mount_h handler will be used to mount a file system of this @a type. |
---|
| 659 | * |
---|
| 660 | * @retval 0 Successful operation. |
---|
| 661 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
| 662 | */ |
---|
| 663 | int rtems_filesystem_register( |
---|
| 664 | const char *type, |
---|
| 665 | rtems_filesystem_fsmount_me_t mount_h |
---|
| 666 | ); |
---|
| 667 | |
---|
| 668 | /** |
---|
| 669 | * @brief Unregisters a file system @a type. |
---|
| 670 | * |
---|
| 671 | * @retval 0 Successful operation. |
---|
| 672 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
| 673 | */ |
---|
| 674 | int rtems_filesystem_unregister( |
---|
| 675 | const char *type |
---|
| 676 | ); |
---|
| 677 | |
---|
| 678 | /** |
---|
| 679 | * @brief Unmounts the file system at @a mount_path. |
---|
| 680 | * |
---|
| 681 | * @todo Due to file system implementation shortcomings it is possible to |
---|
| 682 | * unmount file systems in use. This likely leads to heap corruption. Unmount |
---|
| 683 | * only file systems which are not in use by the application. |
---|
| 684 | * |
---|
| 685 | * @retval 0 Successful operation. |
---|
| 686 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
| 687 | */ |
---|
[615d8cc] | 688 | int unmount( |
---|
| 689 | const char *mount_path |
---|
| 690 | ); |
---|
| 691 | |
---|
[955a34b5] | 692 | /** |
---|
| 693 | * @brief Mounts a file system at @a target. |
---|
| 694 | * |
---|
| 695 | * The @a source may be a path to the corresponding device file, or @c NULL. |
---|
| 696 | * The @a target path must lead to an existing directory, or @c NULL. In case |
---|
| 697 | * @a target is @c NULL, the root file system will be mounted. The @a data |
---|
| 698 | * parameter will be forwarded to the file system initialization handler. The |
---|
| 699 | * file system type is selected by @a filesystemtype and may be one of |
---|
| 700 | * - RTEMS_FILESYSTEM_TYPE_DEVFS, |
---|
| 701 | * - RTEMS_FILESYSTEM_TYPE_DOSFS, |
---|
| 702 | * - RTEMS_FILESYSTEM_TYPE_FTPFS, |
---|
| 703 | * - RTEMS_FILESYSTEM_TYPE_IMFS, |
---|
| 704 | * - RTEMS_FILESYSTEM_TYPE_MINIIMFS, |
---|
| 705 | * - RTEMS_FILESYSTEM_TYPE_NFS, |
---|
| 706 | * - RTEMS_FILESYSTEM_TYPE_RFS, or |
---|
| 707 | * - RTEMS_FILESYSTEM_TYPE_TFTPFS. |
---|
| 708 | * |
---|
| 709 | * Only configured or registered file system types are available. You can add |
---|
| 710 | * file system types to your application configuration with |
---|
| 711 | * - CONFIGURE_FILESYSTEM_DEVFS, |
---|
| 712 | * - CONFIGURE_FILESYSTEM_DOSFS, |
---|
| 713 | * - CONFIGURE_FILESYSTEM_FTPFS, |
---|
| 714 | * - CONFIGURE_FILESYSTEM_IMFS, |
---|
| 715 | * - CONFIGURE_FILESYSTEM_MINIIMFS, |
---|
| 716 | * - CONFIGURE_FILESYSTEM_NFS, |
---|
| 717 | * - CONFIGURE_FILESYSTEM_RFS, and |
---|
| 718 | * - CONFIGURE_FILESYSTEM_TFTPFS. |
---|
| 719 | * |
---|
| 720 | * @see rtems_filesystem_register() and mount_and_make_target_path(). |
---|
| 721 | * |
---|
| 722 | * @retval 0 Successful operation. |
---|
| 723 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
| 724 | */ |
---|
[615d8cc] | 725 | int mount( |
---|
| 726 | const char *source, |
---|
| 727 | const char *target, |
---|
| 728 | const char *filesystemtype, |
---|
| 729 | rtems_filesystem_options_t options, |
---|
| 730 | const void *data |
---|
| 731 | ); |
---|
| 732 | |
---|
[3d3a18e6] | 733 | /** |
---|
| 734 | * @brief Mounts a file system and makes the @a target path. |
---|
| 735 | * |
---|
| 736 | * The @a target path will be created with rtems_mkdir() and must not be |
---|
| 737 | * @c NULL. |
---|
| 738 | * |
---|
| 739 | * @see mount(). |
---|
| 740 | * |
---|
| 741 | * @retval 0 Successful operation. |
---|
| 742 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
| 743 | */ |
---|
| 744 | int mount_and_make_target_path( |
---|
| 745 | const char *source, |
---|
| 746 | const char *target, |
---|
| 747 | const char *filesystemtype, |
---|
| 748 | rtems_filesystem_options_t options, |
---|
| 749 | const void *data |
---|
| 750 | ); |
---|
| 751 | |
---|
[955a34b5] | 752 | /** |
---|
| 753 | * @brief Per file system type routine. |
---|
| 754 | * |
---|
| 755 | * @see rtems_filesystem_iterate(). |
---|
| 756 | * |
---|
| 757 | * @retval true Stop the iteration. |
---|
| 758 | * @retval false Continue the iteration. |
---|
| 759 | */ |
---|
| 760 | typedef bool (*rtems_per_filesystem_routine)( |
---|
| 761 | const rtems_filesystem_table_t *fs_entry, |
---|
| 762 | void *arg |
---|
| 763 | ); |
---|
| 764 | |
---|
| 765 | /** |
---|
| 766 | * @brief Iterates over all file system types. |
---|
| 767 | * |
---|
| 768 | * For each file system type the @a routine will be called with the entry and |
---|
| 769 | * the @a routine_arg parameter. |
---|
| 770 | * |
---|
| 771 | * Do not register or unregister file system types in @a routine. |
---|
| 772 | * |
---|
| 773 | * The iteration is protected by the IO library mutex. |
---|
| 774 | * |
---|
| 775 | * @retval true Iteration stopped due to @a routine return status. |
---|
| 776 | * @retval false Iteration through all entries. |
---|
| 777 | */ |
---|
| 778 | bool rtems_filesystem_iterate( |
---|
| 779 | rtems_per_filesystem_routine routine, |
---|
| 780 | void *routine_arg |
---|
| 781 | ); |
---|
| 782 | |
---|
| 783 | /** |
---|
| 784 | * @brief Per file system mount routine. |
---|
| 785 | * |
---|
| 786 | * @see rtems_filesystem_mount_iterate(). |
---|
| 787 | * |
---|
| 788 | * @retval true Stop the iteration. |
---|
| 789 | * @retval false Continue the iteration. |
---|
| 790 | */ |
---|
| 791 | typedef bool (*rtems_per_filesystem_mount_routine)( |
---|
| 792 | const rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
| 793 | void *arg |
---|
| 794 | ); |
---|
| 795 | |
---|
| 796 | /** |
---|
| 797 | * @brief Iterates over all file system mounts. |
---|
| 798 | * |
---|
| 799 | * For each file system mount the @a routine will be called with the entry and |
---|
| 800 | * the @a routine_arg parameter. |
---|
| 801 | * |
---|
| 802 | * Do not mount or unmount file systems in @a routine. |
---|
| 803 | * |
---|
| 804 | * The iteration is protected by the IO library mutex. |
---|
| 805 | * |
---|
| 806 | * @retval true Iteration stopped due to @a routine return status. |
---|
| 807 | * @retval false Iteration through all entries. |
---|
[615d8cc] | 808 | */ |
---|
[955a34b5] | 809 | bool |
---|
| 810 | rtems_filesystem_mount_iterate( |
---|
| 811 | rtems_per_filesystem_mount_routine routine, |
---|
| 812 | void *routine_arg |
---|
| 813 | ); |
---|
[615d8cc] | 814 | |
---|
[955a34b5] | 815 | /** |
---|
| 816 | * @brief Boot time mount table entry. |
---|
| 817 | */ |
---|
[615d8cc] | 818 | typedef struct { |
---|
| 819 | const char *type; |
---|
| 820 | rtems_filesystem_options_t fsoptions; |
---|
| 821 | const char *device; |
---|
| 822 | const char *mount_point; |
---|
| 823 | } rtems_filesystem_mount_table_t; |
---|
| 824 | |
---|
| 825 | extern const rtems_filesystem_mount_table_t *rtems_filesystem_mount_table; |
---|
| 826 | extern const int rtems_filesystem_mount_table_size; |
---|
| 827 | |
---|
| 828 | /** |
---|
| 829 | * @brief Creates a directory and all its parrent directories according to |
---|
| 830 | * @a path. |
---|
| 831 | * |
---|
| 832 | * The @a mode value selects the access permissions of the directory. |
---|
| 833 | * |
---|
| 834 | * @retval 0 Successful operation. |
---|
[3d3a18e6] | 835 | * @retval -1 An error occured. The @c errno indicates the error. |
---|
[615d8cc] | 836 | */ |
---|
| 837 | extern int rtems_mkdir(const char *path, mode_t mode); |
---|
| 838 | |
---|
| 839 | /** @} */ |
---|
| 840 | |
---|
| 841 | /** |
---|
| 842 | * @defgroup Termios Termios |
---|
| 843 | * |
---|
| 844 | * @ingroup LibIO |
---|
| 845 | * |
---|
| 846 | * @brief Termios |
---|
| 847 | * |
---|
| 848 | * @{ |
---|
[161e1b3f] | 849 | */ |
---|
[07a3253d] | 850 | |
---|
[161e1b3f] | 851 | typedef struct rtems_termios_callbacks { |
---|
[07a3253d] | 852 | int (*firstOpen)(int major, int minor, void *arg); |
---|
| 853 | int (*lastClose)(int major, int minor, void *arg); |
---|
| 854 | int (*pollRead)(int minor); |
---|
[b2cc165] | 855 | ssize_t (*write)(int minor, const char *buf, size_t len); |
---|
[07a3253d] | 856 | int (*setAttributes)(int minor, const struct termios *t); |
---|
| 857 | int (*stopRemoteTx)(int minor); |
---|
| 858 | int (*startRemoteTx)(int minor); |
---|
| 859 | int outputUsesInterrupts; |
---|
[161e1b3f] | 860 | } rtems_termios_callbacks; |
---|
| 861 | |
---|
[ae35953d] | 862 | void rtems_termios_initialize (void); |
---|
[07a3253d] | 863 | |
---|
[1f5d2ba] | 864 | /* |
---|
| 865 | * CCJ: Change before opening a tty. Newer code from Eric is coming |
---|
| 866 | * so extra work to handle an open tty is not worth it. If the tty |
---|
| 867 | * is open, close then open it again. |
---|
| 868 | */ |
---|
| 869 | rtems_status_code rtems_termios_bufsize ( |
---|
| 870 | int cbufsize, /* cooked buffer size */ |
---|
| 871 | int raw_input, /* raw input buffer size */ |
---|
| 872 | int raw_output /* raw output buffer size */ |
---|
| 873 | ); |
---|
| 874 | |
---|
[ae35953d] | 875 | rtems_status_code rtems_termios_open ( |
---|
[161e1b3f] | 876 | rtems_device_major_number major, |
---|
| 877 | rtems_device_minor_number minor, |
---|
| 878 | void *arg, |
---|
| 879 | const rtems_termios_callbacks *callbacks |
---|
[07a3253d] | 880 | ); |
---|
| 881 | |
---|
| 882 | rtems_status_code rtems_termios_close( |
---|
| 883 | void *arg |
---|
| 884 | ); |
---|
| 885 | |
---|
| 886 | rtems_status_code rtems_termios_read( |
---|
| 887 | void *arg |
---|
| 888 | ); |
---|
| 889 | |
---|
| 890 | rtems_status_code rtems_termios_write( |
---|
| 891 | void *arg |
---|
| 892 | ); |
---|
| 893 | |
---|
| 894 | rtems_status_code rtems_termios_ioctl( |
---|
| 895 | void *arg |
---|
| 896 | ); |
---|
| 897 | |
---|
| 898 | int rtems_termios_enqueue_raw_characters( |
---|
| 899 | void *ttyp, |
---|
| 900 | char *buf, |
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| 901 | int len |
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| 902 | ); |
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| 903 | |
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| 904 | int rtems_termios_dequeue_characters( |
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| 905 | void *ttyp, |
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| 906 | int len |
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| 907 | ); |
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| 908 | |
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[615d8cc] | 909 | /** @} */ |
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[d40da79b] | 910 | |
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[955a34b5] | 911 | /** |
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| 912 | * @brief The pathconf setting for a file system. |
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| 913 | */ |
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| 914 | #define rtems_filesystem_pathconf(_mte) ((_mte)->pathconf_limits_and_options) |
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| 915 | |
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| 916 | /** |
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| 917 | * @brief The type of file system. Its name. |
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| 918 | */ |
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| 919 | #define rtems_filesystem_type(_mte) ((_mte)->type) |
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| 920 | |
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| 921 | /** |
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| 922 | * @brief The mount point of a file system. |
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| 923 | */ |
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| 924 | #define rtems_filesystem_mount_point(_mte) ((_mte)->target) |
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| 925 | |
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| 926 | /** |
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| 927 | * @brief The device entry of a file system. |
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| 928 | */ |
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| 929 | #define rtems_filesystem_mount_device(_mte) ((_mte)->dev) |
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| 930 | |
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[80c2966] | 931 | #ifdef __cplusplus |
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| 932 | } |
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| 933 | #endif |
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| 934 | |
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[b06e68ef] | 935 | #endif /* _RTEMS_LIBIO_H */ |
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