Provided by: manpages-dev_3.27-1ubuntu2_all
sysfs - get file system type information
int sysfs(int option, const char *fsname);
int sysfs(int option, unsigned int fs_index, char *buf);
int sysfs(int option);
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 numbering of the file-system type indexes begins with zero.
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.
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.
This System-V derived system call is obsolete; don't use it. On
systems with /proc, the same information can be obtained via
/proc/filesystems; use that interface instead.
There is no libc or glibc support. There is no way to guess how large
buf should be.
This page is part of release 3.27 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/.