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Manual Pages  — GETVFSBYNAME

NAME

getvfsbyname – get information about a file system

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

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

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

DESCRIPTION

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
VFCF_DELEGADMIN
  supports delegated administration if vfs.usermount sysctl is set to 1

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:
[ENOENT]
  The name argument specifies a file system that is unknown or not configured in the kernel.

SEE ALSO

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

HISTORY

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

GETVFSBYNAME (3) August 16, 2018

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