osx man page for getvfsbyname

GETVFSBYNAME(3) 					   BSD Library Functions Manual 					   GETVFSBYNAME(3)

NAME
     getvfsbyname -- get information about a filesystem

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/param.h>
     #include <sys/mount.h>

     int
     getvfsbyname(const char *name, struct vfsconf *vfc);

DESCRIPTION
     The getvfsbyname() function provides access to information about a filesystem module that is configured in the kernel.  If successful, the
     requested filesystem vfsconf is returned in the location pointed to by vfc.  The fields in a ``struct vfsconf'' are defined as follows:

     vfc_name	   the name of the filesystem
     vfc_typenum   the filesystem type number assigned by the kernel
     vfc_refcount  the number of active mount points using the filesystem

RETURN VALUES
     The getvfsbyname() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to
     indicate the error.

ERRORS
     The following errors may be reported:

     [EFAULT]		The vfc pointer contains an invalid address.

     [ENOENT]		The name specifies a filesystem that is unknown or not configured in the kernel.

SEE ALSO
     mount(2), sysctl(3), mount(8), sysctl(8)

HISTORY
     A variant of the getvfsbyname() function first appeared in FreeBSD 2.0.

BSD
								    May 4, 1995 							       BSD