int rtems_filesystem_evaluate_path( const char *pathname, size_t pathnamelen, int flags, rtems_filesystem_location_info_t *pathloc, int follow_link ) { int i = 0; /* * Verify Input parameters. */ if ( !pathname ) rtems_set_errno_and_return_minus_one( EFAULT ); if ( !pathloc ) rtems_set_errno_and_return_minus_one( EIO ); /* should never happen */ /* * Evaluate the path using the optable evalpath. */ rtems_filesystem_get_start_loc( pathname, &i, pathloc ); /* * We evaluation the path relative to the start location we get got. */ return rtems_filesystem_evaluate_relative_path( &pathname[i], pathnamelen - i, flags, pathloc, follow_link ); }
int symlink( const char *actualpath, const char *sympath ) { rtems_filesystem_location_info_t loc; int i; const char *name_start; int result; rtems_filesystem_get_start_loc( sympath, &i, &loc ); if ( !loc.ops->evalformake_h ) { rtems_set_errno_and_return_minus_one( ENOTSUP ); } result = (*loc.ops->evalformake_h)( &sympath[i], &loc, &name_start ); if ( result != 0 ) return -1; if ( !loc.ops->symlink_h ) { rtems_filesystem_freenode( &loc ); rtems_set_errno_and_return_minus_one( ENOTSUP ); } result = (*loc.ops->symlink_h)( &loc, actualpath, name_start); rtems_filesystem_freenode( &loc ); return result; }
int rmdir( const char *pathname ) { int parentpathlen; const char *name; rtems_filesystem_location_info_t parentloc; rtems_filesystem_location_info_t loc; int i; int result; bool free_parentloc = false; /* * Get the parent node of the node we wish to remove. Find the parent path. */ parentpathlen = rtems_filesystem_dirname ( pathname ); if ( parentpathlen == 0 ) rtems_filesystem_get_start_loc( pathname, &i, &parentloc ); else { result = rtems_filesystem_evaluate_path(pathname, parentpathlen, RTEMS_LIBIO_PERMS_WRITE, &parentloc, false ); if ( result != 0 ) return -1; free_parentloc = true; } /* * Start from the parent to find the node that should be under it. */ loc = parentloc; name = pathname + parentpathlen; name += rtems_filesystem_prefix_separators( name, strlen( name ) ); result = rtems_filesystem_evaluate_relative_path( name , strlen( name ), 0, &loc, false ); if ( result != 0 ) { if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); return -1; } /* * Verify you can remove this node as a directory. */ if ( (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) { rtems_filesystem_freenode( &loc ); if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); rtems_set_errno_and_return_minus_one( ENOTDIR ); } /* * Use the filesystems rmnod to remove the node. */ result = (*loc.handlers->rmnod_h)( &parentloc, &loc ); rtems_filesystem_freenode( &loc ); if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); return result; }
int unlink( const char *path ) { int parentpathlen; const char *name; rtems_filesystem_location_info_t parentloc; rtems_filesystem_location_info_t loc; int i; int result; bool free_parentloc = false; /* * Get the node to be unlinked. Find the parent path first. */ parentpathlen = rtems_filesystem_dirname ( path ); if ( parentpathlen == 0 ) rtems_filesystem_get_start_loc( path, &i, &parentloc ); else { result = rtems_filesystem_evaluate_path( path, parentpathlen, RTEMS_LIBIO_PERMS_WRITE, &parentloc, false ); if ( result != 0 ) return -1; free_parentloc = true; } /* * Start from the parent to find the node that should be under it. */ loc = parentloc; name = path + parentpathlen; name += rtems_filesystem_prefix_separators( name, strlen( name ) ); result = rtems_filesystem_evaluate_relative_path( name , strlen( name ), 0, &loc, false ); if ( result != 0 ) { if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); return -1; } if ( !loc.ops->node_type_h ) { rtems_filesystem_freenode( &loc ); if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); rtems_set_errno_and_return_minus_one( ENOTSUP ); } if ( (*loc.ops->node_type_h)( &loc ) == RTEMS_FILESYSTEM_DIRECTORY ) { rtems_filesystem_freenode( &loc ); if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); rtems_set_errno_and_return_minus_one( EISDIR ); } if ( !loc.ops->unlink_h ) { rtems_filesystem_freenode( &loc ); if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); rtems_set_errno_and_return_minus_one( ENOTSUP ); } result = (*loc.ops->unlink_h)( &parentloc, &loc ); rtems_filesystem_freenode( &loc ); if ( free_parentloc ) rtems_filesystem_freenode( &parentloc ); return result; }