sysfs(2)sysfs(2)NAMEsysfs - get file system type information
is used to return information about the file system types configured in
the system. The number arguments accepted by varies and depends on the
The current recognized opcodes and their functions are:
Translate fsname, a null-terminated file-system type iden‐
tifier, into a file-system type index.
Translate fs_index, a file-system type index, into a null-
terminated file-system type identifier and write
it into the buffer pointed to by buf; this buffer
must be at least of size as defined in If there
is no file-system type configured at fs_index, a
null string is returned for the file-system type
Return one more than the largest file system type con‐
figured. This is not the number of file system
types configured, because the type numbers may
not be contiguous. See the example below.
Upon successful completion, returns the file-system type index if the
opcode is a value of 0 if the opcode is or the number of file system
types configured if the opcode is Otherwise, a value of -1 is returned
and is set to indicate the error.
fails if one or more of the following are true and sets to the value
fsname points to an invalid file-system identifier;
fs_index is negative or greater than the largest
file-system type index; opcode is invalid.
buf or fsname points to an invalid user address.
List the filesystem types configured in the system.