The <sys/utsname.h> header shall define the structure utsname
which shall include at least the following
members:
char sysname[] Name of this implementation of the operating system.
char nodename[] Name of this node within an implementation-defined
communications network.
char release[] Current release level of this implementation.
char version[] Current version level of this release.
char machine[] Name of the hardware type on which the system is running.
The character arrays are of unspecified size, but the data stored
in them shall be terminated by a null byte.
The following shall be declared as a function and may also be defined
as a macro:
int uname(struct utsname *);
The following sections are informative.