[07a3253d] | 1 | /* |
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| 2 | * Evaluation IMFS Node Support Routines |
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| 3 | * |
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[08311cc3] | 4 | * COPYRIGHT (c) 1989-1999. |
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[07a3253d] | 5 | * On-Line Applications Research Corporation (OAR). |
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| 6 | * |
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| 7 | * The license and distribution terms for this file may be |
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| 8 | * found in the file LICENSE in this distribution or at |
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| 9 | * http://www.OARcorp.com/rtems/license.html. |
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| 10 | * |
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| 11 | * $Id$ |
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| 12 | */ |
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| 13 | |
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| 14 | #include <sys/types.h> |
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| 15 | #include <sys/stat.h> |
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| 16 | #include <fcntl.h> |
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| 17 | #include <unistd.h> |
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| 18 | #include <errno.h> |
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| 19 | #include <stdlib.h> |
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| 20 | #include <assert.h> |
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| 21 | |
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| 22 | #include "imfs.h" |
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[c058578] | 23 | #include <rtems/libio_.h> |
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[07a3253d] | 24 | |
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| 25 | #define RTEMS_LIBIO_PERMS_RX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_READ) |
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| 26 | #define RTEMS_LIBIO_PERMS_WX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_WRITE) |
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| 27 | |
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| 28 | #define MAXSYMLINK 5 |
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| 29 | |
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| 30 | int IMFS_Set_handlers( |
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| 31 | rtems_filesystem_location_info_t *loc |
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| 32 | ) |
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| 33 | { |
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[657e1bf6] | 34 | IMFS_jnode_t *node = loc->node_access; |
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| 35 | IMFS_fs_info_t *fs_info; |
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[07a3253d] | 36 | |
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[657e1bf6] | 37 | fs_info = loc->mt_entry->fs_info; |
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[07a3253d] | 38 | switch( node->type ) { |
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| 39 | case IMFS_DIRECTORY: |
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[657e1bf6] | 40 | loc->handlers = fs_info->directory_handlers; |
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[07a3253d] | 41 | break; |
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| 42 | case IMFS_DEVICE: |
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[51435fc7] | 43 | loc->handlers = &IMFS_device_handlers; |
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[07a3253d] | 44 | break; |
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| 45 | case IMFS_SYM_LINK: |
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| 46 | case IMFS_HARD_LINK: |
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[94b357c2] | 47 | loc->handlers = &IMFS_link_handlers; |
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[07a3253d] | 48 | break; |
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| 49 | case IMFS_MEMORY_FILE: |
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[657e1bf6] | 50 | loc->handlers = fs_info->memfile_handlers; |
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[07a3253d] | 51 | break; |
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| 52 | } |
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| 53 | |
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| 54 | return 0; |
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| 55 | } |
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| 56 | |
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| 57 | /* |
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| 58 | * IMFS_evaluate_permission |
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| 59 | * |
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| 60 | * The following routine evaluates that we have permission |
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| 61 | * to do flags on the node. |
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| 62 | */ |
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| 63 | |
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| 64 | int IMFS_evaluate_permission( |
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| 65 | rtems_filesystem_location_info_t *node, |
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| 66 | int flags |
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| 67 | ) |
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| 68 | { |
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| 69 | uid_t st_uid; |
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| 70 | gid_t st_gid; |
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| 71 | IMFS_jnode_t *jnode; |
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| 72 | int flags_to_test; |
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| 73 | |
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[2f87c843] | 74 | if ( !rtems_libio_is_valid_perms( flags ) ) { |
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[07a3253d] | 75 | assert( 0 ); |
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| 76 | set_errno_and_return_minus_one( EIO ); |
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| 77 | } |
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| 78 | |
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| 79 | jnode = node->node_access; |
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| 80 | |
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| 81 | #if defined(RTEMS_POSIX_API) |
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| 82 | st_uid = geteuid(); |
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| 83 | st_gid = getegid(); |
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| 84 | #else |
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| 85 | st_uid = jnode->st_uid; |
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| 86 | st_gid = jnode->st_gid; |
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| 87 | #endif |
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| 88 | |
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| 89 | /* |
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| 90 | * Check if I am owner or a group member or someone else. |
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| 91 | */ |
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| 92 | |
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| 93 | flags_to_test = flags; |
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| 94 | |
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| 95 | if ( st_uid == jnode->st_uid ) |
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| 96 | flags_to_test <<= 6; |
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| 97 | else if ( st_gid == jnode->st_gid ) |
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| 98 | flags_to_test <<= 3; |
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| 99 | else |
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| 100 | /* must be other - do nothing */; |
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| 101 | |
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| 102 | /* |
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| 103 | * If all of the flags are set we have permission |
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| 104 | * to do this. |
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| 105 | */ |
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| 106 | if ( ( flags_to_test & jnode->st_mode) == flags_to_test ) |
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| 107 | return 1; |
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| 108 | |
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| 109 | return 0; |
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| 110 | } |
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| 111 | |
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| 112 | /* |
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| 113 | * IMFS_evaluate_hard_link |
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| 114 | * |
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| 115 | * The following routine evaluates a hardlink to the actual node. |
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| 116 | */ |
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| 117 | |
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| 118 | int IMFS_evaluate_hard_link( |
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| 119 | rtems_filesystem_location_info_t *node, /* IN/OUT */ |
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| 120 | int flags /* IN */ |
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| 121 | ) |
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| 122 | { |
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| 123 | IMFS_jnode_t *jnode = node->node_access; |
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| 124 | int result = 0; |
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| 125 | |
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| 126 | /* |
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| 127 | * Check for things that should never happen. |
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| 128 | */ |
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| 129 | |
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| 130 | if ( jnode->type != IMFS_HARD_LINK ) |
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| 131 | rtems_fatal_error_occurred (0xABCD0000); |
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| 132 | |
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| 133 | /* |
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| 134 | * Set the hard link value and the handlers. |
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| 135 | */ |
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| 136 | |
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| 137 | node->node_access = jnode->info.hard_link.link_node; |
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| 138 | |
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| 139 | IMFS_Set_handlers( node ); |
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| 140 | |
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| 141 | /* |
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| 142 | * Verify we have the correct permissions for this node. |
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| 143 | */ |
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| 144 | |
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[2f87c843] | 145 | if ( !IMFS_evaluate_permission( node, flags ) ) |
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[07a3253d] | 146 | set_errno_and_return_minus_one( EACCES ); |
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| 147 | |
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| 148 | return result; |
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| 149 | } |
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| 150 | |
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| 151 | |
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| 152 | /* |
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| 153 | * IMFS_evaluate_sym_link |
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| 154 | * |
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| 155 | * The following routine evaluates a symbolic link to the actual node. |
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| 156 | */ |
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| 157 | |
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| 158 | int IMFS_evaluate_sym_link( |
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| 159 | rtems_filesystem_location_info_t *node, /* IN/OUT */ |
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| 160 | int flags /* IN */ |
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| 161 | ) |
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| 162 | { |
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| 163 | IMFS_jnode_t *jnode = node->node_access; |
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| 164 | int result = 0; |
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| 165 | int i; |
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| 166 | |
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| 167 | /* |
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| 168 | * Check for things that should never happen. |
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| 169 | */ |
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| 170 | |
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| 171 | if ( jnode->type != IMFS_SYM_LINK ) |
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| 172 | rtems_fatal_error_occurred (0xABCD0000); |
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| 173 | |
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| 174 | if ( !jnode->Parent ) |
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| 175 | rtems_fatal_error_occurred( 0xBAD00000 ); |
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| 176 | |
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| 177 | |
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| 178 | /* |
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| 179 | * Move the node_access to either the symbolic links parent or |
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| 180 | * root depending on the symbolic links path. |
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| 181 | */ |
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| 182 | |
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| 183 | node->node_access = jnode->Parent; |
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| 184 | |
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| 185 | rtems_filesystem_get_sym_start_loc( |
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| 186 | jnode->info.sym_link.name, |
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| 187 | &i, |
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| 188 | node |
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| 189 | ); |
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| 190 | |
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| 191 | /* |
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| 192 | * Use eval path to evaluate the path of the symbolic link. |
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| 193 | */ |
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| 194 | |
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| 195 | result = IMFS_eval_path( |
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| 196 | &jnode->info.sym_link.name[i], |
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| 197 | flags, |
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| 198 | node |
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| 199 | ); |
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| 200 | |
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| 201 | IMFS_Set_handlers( node ); |
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| 202 | |
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| 203 | /* |
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| 204 | * Verify we have the correct permissions for this node. |
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| 205 | */ |
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| 206 | |
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[2f87c843] | 207 | if ( !IMFS_evaluate_permission( node, flags ) ) |
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[07a3253d] | 208 | set_errno_and_return_minus_one( EACCES ); |
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| 209 | |
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| 210 | return result; |
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| 211 | } |
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| 212 | |
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| 213 | /* |
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| 214 | * IMFS_evaluate_link |
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| 215 | * |
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| 216 | * The following routine returns the real node pointed to by a link. |
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| 217 | */ |
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| 218 | |
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| 219 | int IMFS_evaluate_link( |
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| 220 | rtems_filesystem_location_info_t *node, /* IN/OUT */ |
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| 221 | int flags /* IN */ |
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| 222 | ) |
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| 223 | { |
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| 224 | IMFS_jnode_t *jnode; |
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| 225 | int result = 0; |
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| 226 | |
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| 227 | do { |
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| 228 | jnode = node->node_access; |
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| 229 | |
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| 230 | /* |
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| 231 | * Increment and check the link counter. |
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| 232 | */ |
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| 233 | |
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| 234 | rtems_filesystem_link_counts ++; |
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| 235 | if ( rtems_filesystem_link_counts > MAXSYMLINK ) { |
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| 236 | rtems_filesystem_link_counts = 0; |
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| 237 | set_errno_and_return_minus_one( ELOOP ); |
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| 238 | } |
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| 239 | |
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| 240 | /* |
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| 241 | * Follow the Link node. |
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| 242 | */ |
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| 243 | |
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| 244 | if ( jnode->type == IMFS_HARD_LINK ) |
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| 245 | result = IMFS_evaluate_hard_link( node, flags ); |
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| 246 | |
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| 247 | else if (jnode->type == IMFS_SYM_LINK ) |
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| 248 | result = IMFS_evaluate_sym_link( node, flags ); |
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| 249 | |
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| 250 | } while ( ( result == 0 ) && ( ( jnode->type == IMFS_SYM_LINK ) || |
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| 251 | ( jnode->type == IMFS_HARD_LINK ) ) ); |
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| 252 | |
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| 253 | /* |
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| 254 | * Clear link counter. |
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| 255 | */ |
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| 256 | |
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| 257 | rtems_filesystem_link_counts = 0; |
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| 258 | |
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| 259 | return result; |
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| 260 | } |
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| 261 | |
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| 262 | |
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| 263 | /* |
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| 264 | * IMFS_evaluate_for_make |
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| 265 | * |
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| 266 | * The following routine evaluate path for a new node to be created. |
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| 267 | * pathloc is returned with a pointer to the parent of the new node. |
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| 268 | * name is returned with a pointer to the first character in the |
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| 269 | * new node name. The parent node is verified to be a directory. |
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| 270 | */ |
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| 271 | |
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| 272 | int IMFS_evaluate_for_make( |
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| 273 | const char *path, /* IN */ |
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| 274 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
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| 275 | const char **name /* OUT */ |
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| 276 | ) |
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| 277 | { |
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| 278 | int i = 0; |
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| 279 | int len; |
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| 280 | IMFS_token_types type; |
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[3cf8394] | 281 | char token[ IMFS_NAME_MAX + 1 ]; |
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[07a3253d] | 282 | rtems_filesystem_location_info_t newloc; |
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| 283 | IMFS_jnode_t *node; |
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| 284 | int done = 0; |
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| 285 | int result; |
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| 286 | |
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| 287 | /* |
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| 288 | * This was filled in by the caller and is valid in the |
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| 289 | * mount table. |
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| 290 | */ |
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| 291 | node = pathloc->node_access; |
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| 292 | |
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| 293 | /* |
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| 294 | * Evaluate all tokens until we are done or an error occurs. |
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| 295 | */ |
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| 296 | |
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| 297 | while( !done ) { |
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| 298 | |
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| 299 | type = IMFS_get_token( &path[i], token, &len ); |
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| 300 | i += len; |
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| 301 | |
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| 302 | if ( !pathloc->node_access ) |
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| 303 | set_errno_and_return_minus_one( ENOENT ); |
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| 304 | |
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| 305 | /* |
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| 306 | * I cannot move out of this directory without execute permission. |
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| 307 | */ |
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| 308 | |
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| 309 | if ( type != IMFS_NO_MORE_PATH ) |
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| 310 | if ( node->type == IMFS_DIRECTORY ) |
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[2f87c843] | 311 | if ( !IMFS_evaluate_permission( pathloc, RTEMS_LIBIO_PERMS_SEARCH ) ) |
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[07a3253d] | 312 | set_errno_and_return_minus_one( EACCES ); |
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| 313 | |
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| 314 | node = pathloc->node_access; |
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| 315 | |
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| 316 | switch( type ) { |
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| 317 | |
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| 318 | case IMFS_UP_DIR: |
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| 319 | |
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| 320 | /* |
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| 321 | * Am I at the root of this mounted filesystem? |
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| 322 | */ |
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| 323 | |
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| 324 | if (pathloc->node_access == pathloc->mt_entry->mt_fs_root.node_access){ |
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| 325 | |
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| 326 | /* |
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| 327 | * Am I at the root of all filesystems? |
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| 328 | */ |
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| 329 | |
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| 330 | if ( pathloc->node_access == rtems_filesystem_root.node_access ) { |
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| 331 | break; |
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| 332 | |
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| 333 | } else { |
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| 334 | newloc = pathloc->mt_entry->mt_point_node; |
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| 335 | *pathloc = newloc; |
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[9c3fa30] | 336 | return (*pathloc->ops->evalformake_h)( &path[i-len], pathloc, name ); |
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[07a3253d] | 337 | } |
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| 338 | } else { |
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| 339 | |
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| 340 | if ( !node->Parent ) |
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| 341 | set_errno_and_return_minus_one( ENOENT ); |
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| 342 | |
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| 343 | node = node->Parent; |
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| 344 | } |
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| 345 | |
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| 346 | pathloc->node_access = node; |
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| 347 | break; |
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| 348 | |
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| 349 | case IMFS_NAME: |
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| 350 | |
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| 351 | if ( node->type == IMFS_HARD_LINK ) { |
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| 352 | |
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| 353 | result = IMFS_evaluate_link( pathloc, 0 ); |
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| 354 | if ( result == -1 ) |
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| 355 | return -1; |
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| 356 | |
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| 357 | } else if ( node->type == IMFS_SYM_LINK ) { |
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| 358 | |
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| 359 | result = IMFS_evaluate_link( pathloc, 0 ); |
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| 360 | |
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| 361 | if ( result == -1 ) |
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| 362 | return -1; |
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| 363 | } |
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| 364 | |
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| 365 | node = pathloc->node_access; |
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| 366 | if ( !node ) |
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| 367 | set_errno_and_return_minus_one( ENOTDIR ); |
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| 368 | |
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| 369 | /* |
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| 370 | * Only a directory can be decended into. |
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| 371 | */ |
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| 372 | |
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| 373 | if ( node->type != IMFS_DIRECTORY ) |
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| 374 | set_errno_and_return_minus_one( ENOTDIR ); |
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| 375 | |
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| 376 | /* |
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| 377 | * If we are at a node that is a mount point. Set loc to the |
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| 378 | * new fs root node and let them finish evaluating the path. |
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| 379 | */ |
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| 380 | |
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| 381 | if ( node->info.directory.mt_fs != NULL ) { |
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| 382 | newloc = node->info.directory.mt_fs->mt_fs_root; |
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| 383 | *pathloc = newloc; |
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[9c3fa30] | 384 | return (*pathloc->ops->evalformake_h)( &path[i-len], pathloc, name ); |
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[07a3253d] | 385 | } |
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| 386 | |
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| 387 | /* |
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| 388 | * Otherwise find the token name in the present location. |
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| 389 | */ |
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| 390 | |
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| 391 | node = IMFS_find_match_in_dir( node, token ); |
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| 392 | |
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| 393 | /* |
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| 394 | * If there is no node we have found the name of the node we |
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| 395 | * wish to create. |
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| 396 | */ |
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| 397 | |
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| 398 | if ( ! node ) |
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| 399 | done = TRUE; |
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| 400 | else |
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| 401 | pathloc->node_access = node; |
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| 402 | |
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| 403 | break; |
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| 404 | |
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| 405 | case IMFS_NO_MORE_PATH: |
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| 406 | set_errno_and_return_minus_one( EEXIST ); |
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| 407 | break; |
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| 408 | |
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| 409 | case IMFS_INVALID_TOKEN: |
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| 410 | set_errno_and_return_minus_one( ENAMETOOLONG ); |
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| 411 | break; |
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| 412 | |
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| 413 | case IMFS_CURRENT_DIR: |
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| 414 | break; |
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| 415 | } |
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| 416 | } |
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| 417 | |
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| 418 | *name = &path[ i - len ]; |
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| 419 | |
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| 420 | /* |
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| 421 | * We have evaluated the path as far as we can. |
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| 422 | * Verify there is not any invalid stuff at the end of the name. |
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| 423 | */ |
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| 424 | |
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| 425 | for( ; path[i] != '\0'; i++) { |
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[2f87c843] | 426 | if ( !IMFS_is_separator( path[ i ] ) ) |
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[07a3253d] | 427 | set_errno_and_return_minus_one( ENOENT ); |
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| 428 | } |
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| 429 | |
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| 430 | /* |
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| 431 | * Verify we can execute and write to this directory. |
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| 432 | */ |
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| 433 | |
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| 434 | result = IMFS_Set_handlers( pathloc ); |
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| 435 | |
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| 436 | /* |
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| 437 | * The returned node must be a directory |
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| 438 | */ |
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| 439 | node = pathloc->node_access; |
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| 440 | if ( node->type != IMFS_DIRECTORY ) |
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| 441 | set_errno_and_return_minus_one( ENOTDIR ); |
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| 442 | |
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| 443 | /* |
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| 444 | * We must have Write and execute permission on the returned node. |
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| 445 | */ |
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| 446 | |
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[2f87c843] | 447 | if ( !IMFS_evaluate_permission( pathloc, RTEMS_LIBIO_PERMS_WX ) ) |
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[07a3253d] | 448 | set_errno_and_return_minus_one( EACCES ); |
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| 449 | |
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| 450 | return result; |
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| 451 | } |
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| 452 | |
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| 453 | |
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| 454 | /* |
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| 455 | * IMFS_eval_path |
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| 456 | * |
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| 457 | * The following routine evaluate path for a node that wishes to be |
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| 458 | * accessed with mode. pathloc is returned with a pointer to the |
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| 459 | * node to be accessed. |
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| 460 | */ |
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| 461 | |
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| 462 | int IMFS_eval_path( |
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| 463 | const char *pathname, /* IN */ |
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| 464 | int flags, /* IN */ |
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| 465 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
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| 466 | ) |
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| 467 | { |
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| 468 | int i = 0; |
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| 469 | int len; |
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| 470 | IMFS_token_types type = IMFS_CURRENT_DIR; |
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[3cf8394] | 471 | char token[ IMFS_NAME_MAX + 1 ]; |
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[07a3253d] | 472 | rtems_filesystem_location_info_t newloc; |
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| 473 | IMFS_jnode_t *node; |
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| 474 | int result; |
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| 475 | |
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[2f87c843] | 476 | if ( !rtems_libio_is_valid_perms( flags ) ) { |
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[07a3253d] | 477 | assert( 0 ); |
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| 478 | set_errno_and_return_minus_one( EIO ); |
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| 479 | } |
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| 480 | |
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| 481 | /* |
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| 482 | * This was filled in by the caller and is valid in the |
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| 483 | * mount table. |
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| 484 | */ |
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| 485 | |
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| 486 | node = pathloc->node_access; |
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| 487 | |
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| 488 | /* |
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| 489 | * Evaluate all tokens until we are done or an error occurs. |
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| 490 | */ |
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| 491 | |
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| 492 | while( (type != IMFS_NO_MORE_PATH) && (type != IMFS_INVALID_TOKEN) ) { |
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| 493 | |
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| 494 | type = IMFS_get_token( &pathname[i], token, &len ); |
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| 495 | i += len; |
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| 496 | |
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| 497 | if ( !pathloc->node_access ) |
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| 498 | set_errno_and_return_minus_one( ENOENT ); |
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| 499 | |
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| 500 | /* |
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| 501 | * I cannot move out of this directory without execute permission. |
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| 502 | */ |
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| 503 | if ( type != IMFS_NO_MORE_PATH ) |
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| 504 | if ( node->type == IMFS_DIRECTORY ) |
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[2f87c843] | 505 | if ( !IMFS_evaluate_permission( pathloc, RTEMS_LIBIO_PERMS_SEARCH ) ) |
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[07a3253d] | 506 | set_errno_and_return_minus_one( EACCES ); |
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| 507 | |
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| 508 | node = pathloc->node_access; |
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| 509 | |
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| 510 | switch( type ) { |
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| 511 | case IMFS_UP_DIR: |
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| 512 | |
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| 513 | /* |
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| 514 | * Am I at the root of this mounted filesystem? |
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| 515 | */ |
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| 516 | |
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| 517 | if (pathloc->node_access == |
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| 518 | pathloc->mt_entry->mt_fs_root.node_access) { |
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| 519 | |
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| 520 | /* |
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| 521 | * Am I at the root of all filesystems? |
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| 522 | */ |
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| 523 | |
---|
| 524 | if ( pathloc->node_access == rtems_filesystem_root.node_access ) { |
---|
| 525 | break; /* Throw out the .. in this case */ |
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| 526 | } else { |
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| 527 | newloc = pathloc->mt_entry->mt_point_node; |
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| 528 | *pathloc = newloc; |
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[9c3fa30] | 529 | return (*pathloc->ops->evalpath_h)(&(pathname[i-len]),flags,pathloc); |
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[07a3253d] | 530 | } |
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| 531 | } else { |
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| 532 | |
---|
| 533 | if ( !node->Parent ) |
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| 534 | set_errno_and_return_minus_one( ENOENT ); |
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| 535 | |
---|
| 536 | node = node->Parent; |
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| 537 | pathloc->node_access = node; |
---|
| 538 | |
---|
| 539 | } |
---|
| 540 | |
---|
| 541 | pathloc->node_access = node; |
---|
| 542 | break; |
---|
| 543 | |
---|
| 544 | case IMFS_NAME: |
---|
| 545 | /* |
---|
| 546 | * If we are at a link follow it. |
---|
| 547 | */ |
---|
| 548 | |
---|
| 549 | if ( node->type == IMFS_HARD_LINK ) { |
---|
| 550 | |
---|
| 551 | IMFS_evaluate_hard_link( pathloc, 0 ); |
---|
| 552 | |
---|
| 553 | node = pathloc->node_access; |
---|
| 554 | if ( !node ) |
---|
| 555 | set_errno_and_return_minus_one( ENOTDIR ); |
---|
| 556 | |
---|
| 557 | } else if ( node->type == IMFS_SYM_LINK ) { |
---|
| 558 | |
---|
| 559 | result = IMFS_evaluate_sym_link( pathloc, 0 ); |
---|
| 560 | |
---|
| 561 | node = pathloc->node_access; |
---|
| 562 | if ( result == -1 ) |
---|
| 563 | return -1; |
---|
| 564 | } |
---|
| 565 | |
---|
| 566 | /* |
---|
| 567 | * Only a directory can be decended into. |
---|
| 568 | */ |
---|
| 569 | |
---|
| 570 | if ( node->type != IMFS_DIRECTORY ) |
---|
| 571 | set_errno_and_return_minus_one( ENOTDIR ); |
---|
| 572 | |
---|
| 573 | /* |
---|
| 574 | * If we are at a node that is a mount point. Set loc to the |
---|
| 575 | * new fs root node and let them finish evaluating the path. |
---|
| 576 | */ |
---|
| 577 | |
---|
| 578 | if ( node->info.directory.mt_fs != NULL ) { |
---|
| 579 | newloc = node->info.directory.mt_fs->mt_fs_root; |
---|
| 580 | *pathloc = newloc; |
---|
[9c3fa30] | 581 | return (*pathloc->ops->evalpath_h)( &pathname[i-len], flags, pathloc ); |
---|
[07a3253d] | 582 | } |
---|
| 583 | |
---|
| 584 | /* |
---|
| 585 | * Otherwise find the token name in the present location. |
---|
| 586 | */ |
---|
| 587 | |
---|
| 588 | node = IMFS_find_match_in_dir( node, token ); |
---|
| 589 | if ( !node ) |
---|
| 590 | set_errno_and_return_minus_one( ENOENT ); |
---|
| 591 | |
---|
| 592 | /* |
---|
| 593 | * Set the node access to the point we have found. |
---|
| 594 | */ |
---|
| 595 | |
---|
| 596 | pathloc->node_access = node; |
---|
| 597 | break; |
---|
| 598 | |
---|
| 599 | case IMFS_NO_MORE_PATH: |
---|
| 600 | case IMFS_CURRENT_DIR: |
---|
| 601 | break; |
---|
| 602 | |
---|
| 603 | case IMFS_INVALID_TOKEN: |
---|
| 604 | set_errno_and_return_minus_one( ENAMETOOLONG ); |
---|
| 605 | break; |
---|
| 606 | |
---|
| 607 | } |
---|
| 608 | } |
---|
| 609 | |
---|
| 610 | /* |
---|
[13e47e2e] | 611 | * Always return the root node. |
---|
| 612 | * |
---|
| 613 | * If we are at a node that is a mount point. Set loc to the |
---|
| 614 | * new fs root node and let let the mounted filesystem set the handlers. |
---|
| 615 | * |
---|
| 616 | * NOTE: The behavior of stat() on a mount point appears to be questionable. |
---|
[07a3253d] | 617 | */ |
---|
| 618 | |
---|
[13e47e2e] | 619 | if ( node->type == IMFS_DIRECTORY ) { |
---|
| 620 | if ( node->info.directory.mt_fs != NULL ) { |
---|
| 621 | newloc = node->info.directory.mt_fs->mt_fs_root; |
---|
| 622 | *pathloc = newloc; |
---|
| 623 | return (*pathloc->ops->evalpath_h)( &pathname[i-len], flags, pathloc ); |
---|
| 624 | } else { |
---|
| 625 | result = IMFS_Set_handlers( pathloc ); |
---|
| 626 | } |
---|
| 627 | } else { |
---|
| 628 | result = IMFS_Set_handlers( pathloc ); |
---|
[07a3253d] | 629 | } |
---|
| 630 | |
---|
| 631 | /* |
---|
| 632 | * Verify we have the correct permissions for this node. |
---|
| 633 | */ |
---|
| 634 | |
---|
[2f87c843] | 635 | if ( !IMFS_evaluate_permission( pathloc, flags ) ) |
---|
[07a3253d] | 636 | set_errno_and_return_minus_one( EACCES ); |
---|
| 637 | |
---|
| 638 | return result; |
---|
| 639 | } |
---|