get system identification
function stores NUL-terminated strings of information identifying the
current system into the structure referenced by
The utsname structure is defined in the
<sys/utsname.h> header file,
and contains the following members:
- Name of the operating system implementation.
- Network name of this machine.
- Release level of the operating system.
- Version level of the operating system.
- Machine hardware platform.
These are the same strings that can be displayed with uname(1). Because their format and meaning depends on the operating system, trying to parse or interpret them is discouraged in portable code. The only reasonable way an application program can use them is for displaying them to the user.
uname() function returns a
non-negative value if successful; otherwise the value -1 is returned and the
global variable errno is set to indicate the
uname() function may fail and set
errno for any of the errors specified for the library
uname() function conforms to
IEEE Std 1003.1-1988 (“POSIX.1”).
uname() function first appeared in
PWB/UNIX 1.0 and was reimplemented for 4.4BSD.