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GETDISKBYNAME(3) Library Functions Manual GETDISKBYNAME(3)

getdiskbyname
get generic disk description by its name

#include <sys/types.h>
#include <sys/disklabel.h>
struct disklabel *
getdiskbyname(const char *name);

The getdiskbyname() function takes a disk name (e.g., “rm03”) and returns a prototype disk label describing its geometry information and the standard disk partition tables. All information is obtained from the disktab(5) file.

disklabel(5), disktab(5), disklabel(8)

The getdiskbyname() function appeared in 4.3BSD.
June 5, 2013 OpenBSD-current