osf1 man page for sysfs

sysfs(2)							System Calls Manual							  sysfs(2)

NAME
       sysfs - gather information about file system types

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 );

PARAMETERS
       Points  to  the buffer where the file system type is placed.  The buffer size must be equal to FSTYPSZ as defined in <sys/fstyp.h>.  Speci-
       fies an index file system type.	Specifies a null-terminated file system type identifier.  Specifies an operation used to  obtain  informa-
       tion about the file system types.

DESCRIPTION
       This function gathers information about configured file system types.  Depending on the operation you want to perform, the opcode parameter
       may be specified by itself, or in combination with the other available parameters as shown in the SYNOPSIS section.

       The opcode parameter may be one of the following: Must be specified with the fsname parameter.  This operation changes the specified  null-
       terminated  file  system  type  identifier  to a file system type identifier.  Must be specified with the parameters fs_index and buf. This
       operation changes the specified file system type index to a null-terminated type file system type identifier and writes it into the  buffer
       specified.  Specified by itself, this operation requests the total number of file system types configured in the system to be returned.

RETURN VALUES
       The  following values are returned on success: If GETFSIND is specified, the file system type index is returned.  If GETFSTYP is specified,
       a value of zero (0) is returned.  If GETNFSTYP is specified, the number of file system types configured in the system is returned.

       On error, a value of -1 is returned and errno is set.

ERRORS
       One or more of the following may be returned on failure: Indicates an invalid file system identifier is pointed to  fsname,  the  specified
       fs_index  is either zero (0) or invalid, or the specified opcode is invalid.  Indicates that either fsname or buf is pointing to an invalid
       user address.  Indicates that a file system was installed with a name that exceeds the buffer size of FSTYPSZ.

																	  sysfs(2)