sysfs

SYSFS(2)		  Linux Programmer’s Manual		     SYSFS(2)



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-ter-
	      minated  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
       EINVAL fsname is not a valid file-system type identifier; fs_index  is
	      out-of-bounds; option is invalid.

       EFAULT Either  fsname or buf is outside your accessible address space.


CONFORMING TO
       SVr4.

NOTE
       On Linux with the proc filesystem mounted on /proc, the same  informa-
       tion can be derived from /proc/filesystems.

BUGS
       There is no libc or glibc support.  There is no way to guess how large
       buf should be.




Linux 1.3.16			  1995-08-09			     SYSFS(2)