sysfs - gather information about file system types
#include <sys/fstyp.h> #include <sys/fsid.h>
const char *fsname
Points to the buffer where the file system type is placed.
The buffer size must be equal to
as defined in
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 types.
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.
parameter may be one of the following:
Must be specified with the
This operation changes the specified null-terminated file system type identifier
to a file system type identifier.
Must be specified with the parameters
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
is returned and
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.