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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | NOTES | BUGS | COLOPHON |
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 in effect:
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 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 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 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This System-V derived system call is obsolete; don't use it.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 4.12 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2010-06-27 SYSFS(2)
Pages that refer to this page: statfs(2), syscalls(2)