int sysfs(int option, unsigned int fs_index, char *buf);
int sysfs(int option);
DESCRIPTION
sysfs()
returns information about the file system types currently present in
the kernel.
The specific form of the
sysfs()
call and the information returned depends on the
option
in effect:
1
Translate the file-system identifier string
fsname
into a file-system type index.
2
Translate the file-system type index
fs_index
into a null-terminated file-system identifier string.
This string will
be written to the buffer pointed to by
buf.
Make sure that
buf
has enough space to accept the string.
3
Return the total number of file system types currently present in the
kernel.
The numbering of the file-system type indexes begins with zero.
RETURN VALUE
On success,
sysfs()
returns the file-system index for option
1,
zero for option
2,
and the number of currently configured file systems for option
3.
On error, -1 is returned, and
errno
is set appropriately.
ERRORS
EFAULT
Either fsname or buf
is outside your accessible address space.
EINVAL
fsname
is not a valid file-system type identifier;
fs_index
is out-of-bounds;
option
is invalid.
CONFORMING TO
SVr4.
NOTES
On Linux with the
proc
file system mounted on
/proc,
the same information can be derived from
/proc/filesystems.
BUGS
There is no libc or glibc support.
There is no way to guess how large buf should be.
COLOPHON
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
