sysfs - get filesystem type information
[[deprecated]] int sysfs(int option, const char *fsname);
[[deprecated]] int sysfs(int option, unsigned int fs_index, char *buf);
[[deprecated]] int sysfs(int option);
Note: if you are looking for information about the
sysfs
filesystem that is normally mounted at
/sys, see
sysfs(5).
The (obsolete)
sysfs() system call returns information about the
filesystem 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 filesystem identifier string fsname
into a filesystem type index.
- 2
- Translate the filesystem type index fs_index into a
null-terminated filesystem 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 filesystem types currently
present in the kernel.
The numbering of the filesystem type indexes begins with zero.
On success,
sysfs() returns the filesystem index for option
1,
zero for option
2, and the number of currently configured filesystems
for option
3. On error, -1 is returned, and
errno is set to
indicate the error.
- EFAULT
- Either fsname or buf is outside your
accessible address space.
- EINVAL
-
fsname is not a valid filesystem type identifier;
fs_index is out-of-bounds; option is invalid.
SVr4.
This System-V derived system call is obsolete; don't use it. On systems with
/proc, the same information can be obtained via
/proc; use that
interface instead.
There is no libc or glibc support. There is no way to guess how large
buf
should be.
proc(5),
sysfs(5)