MirBSD manpage: opendev(3)

OPENDEV(3)                 BSD Programmer's Manual                  OPENDEV(3)

NAME

     opendev - short form device open routine

SYNOPSIS

     #include <util.h>

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

DESCRIPTION

     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

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

WARNINGS

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

SEE ALSO

     open(2), getrawpartition(3)

HISTORY

     The opendev() function first appeared in OpenBSD 1.2.

MirBSD #10-current            February 15, 2000                              1