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RedHat 9 (Linux i386) - man page for sysfs (redhat section 2)

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

       sysfs - get file system 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 file system types currently present in the kernel. The
       specific form of the sysfs call and the information returned  depends  on  the  option  in

       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.

       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.

       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.


       On Linux with the proc filesystem mounted on /proc, the same information  can  be  derived
       from /proc/filesystems.

       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)
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