Originální popis anglicky:
sysfs - get file system type information
Návod, kniha: Linux Programmer's Manual
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
NUL-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.
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.
SVr4.
On Linux with the
proc filesystem mounted on
/proc, the same
information can be derived from
/proc/filesystems.
There is no libc or glibc support. There is no way to guess how large
buf
should be.
