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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [imfs_unlink.c] - Rev 773
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/* * IMFS_unlink * * Routine to remove a link node from the tree. * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: imfs_unlink.c,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #include <errno.h> #include <stdlib.h> #include "imfs.h" #include "libio_.h" int IMFS_unlink( rtems_filesystem_location_info_t *loc /* IN */ ) { IMFS_jnode_t *node; rtems_filesystem_location_info_t the_link; int result; node = loc->node_access; /* * Decrement the link counter of node pointed to and free the * space. */ /* * If this is the last last pointer to the node * free the node. */ if ( node->type == IMFS_HARD_LINK ) { if ( !node->info.hard_link.link_node ) set_errno_and_return_minus_one( EINVAL ); the_link = *loc; the_link.node_access = node->info.hard_link.link_node; IMFS_Set_handlers( &the_link ); /* * If removing the last hard link to a node, then we need * to remove the node that is a link and the node itself. */ node->info.hard_link.link_node->st_nlink --; IMFS_update_ctime( node->info.hard_link.link_node ); if ( node->info.hard_link.link_node->st_nlink < 1) { result = (*the_link.handlers->rmnod)( &the_link ); if ( result != 0 ) return -1; } } /* * Now actually free the node we were asked to free. */ result = (*loc->handlers->rmnod)( loc ); return result; }
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