sysfs(2) [opensolaris man page]

sysfs(2)							   System Calls 							  sysfs(2)

NAME

       sysfs - get file system type information

SYNOPSIS

       #include <sys/fstyp.h>
       #include <sys/fsid.h>

       int sysfs(int opcode, const char *fsname);

       int sysfs(int opcode, int fs_index, char *buf);

       int sysfs(int opcode);

DESCRIPTION

       The  sysfs()  function  returns	information  about  the  file system types configured  in the system.  The number of arguments accepted by
       sysfs() depends on the opcode argument, which can take the following values:

       GETFSIND     Translate fsname, a null-terminated file-system type identifier, into a file-system type index.

       GETFSTYP     Translate fs_index, a file-system type index, into a null-terminated file-system type identifier and write it into the  buffer
		    pointed to by buf, which must be at least of size FSTYPSZ as defined in <sys/fstyp.h>.

       GETNFSTYP    Return the total number of file system types configured in the system.

RETURN VALUES

       Upon successful completion, the value returned depends upon the opcode argument as follows:

       GETFSIND     the file-system type index

       GETFSTYP     0

       GETNFSTYP    the number of file system types configured

       Otherwise, -1 is returned  and errno is set to indicate the error.

ERRORS

       The sysfs() function will fail if:

       EFAULT	 The buf or fsname argument points to an illegal address.

       EINVAL	 The fsname argument points to an invalid file-system identifier; the fs_index argument is 0 or invalid; or the opcode argument is
		 invalid.

SunOS 5.11							    5 Jul 1990								  sysfs(2)

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 informa-
       tion 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

       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 information 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)