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SYSFS(2) Linux Programmer's Manual SYSFS(2)
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:
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 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.
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.
This System-V derived system call is obsolete; don't use it.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 3.32 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)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface