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sysfs() - Unix, Linux System Call
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:
The numbering of the file-system type indexes begins with zero.
Translate the file-system identifier string
fsname into a file-system type index.
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.
Return the total number of file system types currently present in the
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.
Either fsname or buf is outside your accessible address space.
fsname is not a valid file-system type identifier;
fs_index is out-of-bounds;
option is invalid.
On Linux with the
proc filesystem mounted on
/proc, the same information can be derived from
There is no libc or glibc support.
There is no way to guess how large buf should be.