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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | BUGS | SEE ALSO | COLOPHON |
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sysfs(2) System Calls Manual sysfs(2)
sysfs - get filesystem type information
[[deprecated]] int sysfs(int option, const char *fsname);
[[deprecated]] int sysfs(int option, unsigned int fs_index, char *buf);
[[deprecated]] int sysfs(int option);
Note: if you are looking for information about the sysfs
filesystem that is normally mounted at /sys, see sysfs(5).
The (obsolete) sysfs() system call 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 to indicate the error.
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.
None.
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This System-V derived system call is obsolete; don't use it.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; use that interface instead.
There is no libc or glibc support. There is no way to guess how
large buf should be.
proc(5), sysfs(5)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.9.1 2024-05-02 sysfs(2)
Pages that refer to this page: statfs(2), syscalls(2), filesystems(5)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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