tail head cat sleep
QR code linking to this page

Manual Pages  — GETVFSBYNAME


getvfsbyname – get information about a file system



Standard C Library (libc, -lc)


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

getvfsbyname(const char *name, struct xvfsconf *vfc);


The getvfsbyname() function provides access to information about a file system module that is configured in the kernel. If successful, the requested file system xvfsconf is returned in the location pointed to by vfc. The fields in a "struct xvfsconf" are defined as follows:

vfc_name the name of the file system
vfc_typenum the file system type number assigned by the kernel
vfc_refcount the number of active mount points using the file system
vfc_flags flag bits, as described below

The flags are defined as follows:

VFCF_STATIC statically compiled into kernel
VFCF_NETWORK may get data over the network
VFCF_READONLY writes are not implemented
VFCF_SYNTHETIC data does not represent real files
VFCF_LOOPBACK aliases some other mounted FS
VFCF_UNICODE stores file names as Unicode
VFCF_JAIL can be mounted from within a jail if allow.mount and allow.mount.<vfc_name> jail parameters are set
  supports delegated administration if vfs.usermount sysctl is set to 1


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.


The following errors may be reported:
  The name argument specifies a file system that is unknown or not configured in the kernel.


jail(2), mount(2), sysctl(3), jail(8), mount(8), sysctl(8)


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

GETVFSBYNAME (3) August 16, 2018

tail head cat sleep
QR code linking to this page

Please direct any comments about this manual page service to Ben Bullock. Privacy policy.

An ASCII character walks into a bar and orders a double. "Having a bad day?" asks the barman. "Yeah, I have a parity error," replies the ASCII character. The barman says, "Yeah, I thought you looked a bit off."