NAME¶
sysfs - 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);
DESCRIPTION¶
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.
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.
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This System-V derived system call is obsolete; don't use it.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 3.44 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/.