sysfs - gather information about file system types
const char *fsname );
char *buf );
int opcode );
buf 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>>.
Specifies an index file system type.
Specifies a null-terminated file system type identifier.
Specifies an operation used to obtain information about the file system
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.
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.
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
Indicates that a file system was installed with a name that exceeds the
buffer size of FSTYPSZ.