int chdir( const char *path )
{
int rv = 0;
rtems_filesystem_eval_path_context_t ctx;
int eval_flags = RTEMS_FS_PERMS_EXEC
| RTEMS_FS_FOLLOW_LINK;
rtems_filesystem_location_info_t pathloc;
rtems_filesystem_eval_path_start( &ctx, path, eval_flags );
rtems_filesystem_eval_path_extract_currentloc( &ctx, &pathloc );
rv = rtems_filesystem_chdir( &pathloc );
rtems_filesystem_eval_path_cleanup( &ctx );
return rv;
}
int fchdir( int fd )
{
int rv = 0;
rtems_libio_t *iop;
struct stat st;
rtems_filesystem_location_info_t loc;
st.st_mode = 0;
st.st_uid = 0;
st.st_gid = 0;
rtems_libio_check_fd( fd );
iop = rtems_libio_iop( fd );
rtems_libio_check_is_open( iop );
rtems_filesystem_instance_lock( &iop->pathinfo );
rv = (*iop->pathinfo.handlers->fstat_h)( &iop->pathinfo, &st );
if ( rv == 0 ) {
bool access_ok = rtems_filesystem_check_access(
RTEMS_FS_PERMS_EXEC,
st.st_mode,
st.st_uid,
st.st_gid
);
if ( access_ok ) {
rtems_filesystem_location_clone( &loc, &iop->pathinfo );
} else {
errno = EACCES;
rv = -1;
}
}
rtems_filesystem_instance_unlock( &iop->pathinfo );
if ( rv == 0 ) {
rv = rtems_filesystem_chdir( &loc );
}
return rv;
}
