Linux 2.6 - man page for sysfs (linux section 2)
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SYSFS(2) Linux Programmer's Manual SYSFS(2)
sysfs - get filesystem 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 filesystem types currently present in the kernel.
The specific form of the sysfs() call and the information returned depends on the option
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 identi-
fier 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 appropriately.
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
This System-V derived system call is obsolete; don't use it.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 3.55 of the Linux man-pages project. A description of the
project, and information about reporting bugs, can be found at
Linux 2010-06-27 SYSFS(2)
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