NAME¶
sysfs - get filesystem type information
SYNOPSIS¶
int sysfs(int option, const char *fsname);
int sysfs(int option, unsigned int fs_index, char
*buf);
int sysfs(int option);
DESCRIPTION¶
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.
RETURN VALUE¶
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.
ERRORS¶
- 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.
NOTES¶
This System-V derived system call is obsolete; don't use it.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.
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 3.74 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
http://www.kernel.org/doc/man-pages/.
