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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [link.c] - Rev 751
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/* * link() - POSIX 1003.1b - 5.3.4 - Create a new link * * 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: link.c,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #include <rtems.h> #include <rtems/libio.h> #include <errno.h> #include "libio_.h" int link( const char *existing, const char *new ) { rtems_filesystem_location_info_t existing_loc; rtems_filesystem_location_info_t parent_loc; int i; int result; const char *name_start; /* * Get the node we are linking to. */ result = rtems_filesystem_evaluate_path( existing, 0, &existing_loc, TRUE ); if ( result != 0 ) return -1; /* * Get the parent of the node we are creating. */ rtems_filesystem_get_start_loc( new, &i, &parent_loc ); result = (*parent_loc.ops->evalformake)( &new[i], &parent_loc, &name_start ); if ( result != 0 ) { rtems_filesystem_freenode( &parent_loc ); set_errno_and_return_minus_one( result ); } /* * Check to see if the caller is trying to link across file system * boundaries. */ if ( parent_loc.mt_entry != existing_loc.mt_entry ) { rtems_filesystem_freenode( &existing_loc ); rtems_filesystem_freenode( &parent_loc ); set_errno_and_return_minus_one( EXDEV ); } if ( !parent_loc.ops->link ) { rtems_filesystem_freenode( &existing_loc ); rtems_filesystem_freenode( &parent_loc ); set_errno_and_return_minus_one( ENOTSUP ); } result = (*parent_loc.ops->link)( &existing_loc, &parent_loc, name_start ); rtems_filesystem_freenode( &existing_loc ); rtems_filesystem_freenode( &parent_loc ); return result; } /* * _link_r * * This is the Newlib dependent reentrant version of link(). */ #if defined(RTEMS_NEWLIB) #include <reent.h> int _link_r( struct _reent *ptr, const char *existing, const char *new ) { return link( existing, new ); } #endif
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