NAME    [Toc]    [Back]

     opendev - short form device open routine

SYNOPSIS    [Toc]    [Back]

     #include <util.h>

     int
     opendev(char   *path,   int   oflags,   int   dflags,   char
**realpath);

DESCRIPTION    [Toc]    [Back]

     The  opendev()  function  opens  a  device using the ``short
form'' name.
     This is typically ``sd0'' or ``sd0c'', for  instance,  which
will be expanded
 to /dev/rsd0c on most architectures.

     Device  name  lookup  is  done  by first checking path for a
``/'' and if one
     is found attempting to open that file.   Otherwise  /dev  is
searched for a
     matching device.

     The oflags are the same as the flags passed to open(2).

     The dflags are specified by OR'ing the following values:

           OPENDEV_PART    attempt to open the raw partition during expansion
           OPENDEV_BLCK    open  the  block  device  (default  is
character device)

     If realpath is not NULL, it is modified to point at the fully expanded
     device name.

RETURN VALUES    [Toc]    [Back]

     The opendev() return value and errors are the  same  as  the
return value
     and errors of open(2).

WARNINGS    [Toc]    [Back]

     If realpath is not NULL, on return it will point to internal
static storage
 space that will be overwritten by subsequent calls.

SEE ALSO    [Toc]    [Back]

     open(2), getrawpartition(3)

HISTORY    [Toc]    [Back]

     The opendev() function first appeared in OpenBSD 1.2.

OpenBSD     3.6                        February     15,      2000