SYSFS(2) Linux Programmer's Manual SYSFS(2)NAMEsysfs - get file system type information
SYNOPSIS
int sysfs(int option, const char *fsname);
int sysfs(int option, unsigned int fs_index, char *buf);
int sysfs(int option);
DESCRIPTIONsysfs() 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-sys‐
tem type index.
2 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.
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.
RETURN VALUE
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.
ERRORS
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.
CONFORMING TO
SVr4.
NOTES
This System-V derived system call is obsolete; don't use it. On sys‐
tems with /proc, the same information can be obtained via
/proc/filesystems; use that interface instead.
BUGS
There is no libc or glibc support. There is no way to guess how large
buf should be.
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2010-06-27 SYSFS(2)
