UNAME(3)

NAME
uname - get system identification

SYNOPSIS
#include <sys/utsname.h>
int
uname(struct utsname *name);

DESCRIPTION
The uname() function stores NUL-terminated strings of information identifying the current system into the structure referenced by name.

The utsname structure is defined in the <sys/utsname.h> header file, and contains the following members:

sysname
    Name of the operating system implementation.
nodename
    Network name of this machine.
release
    Release level of the operating system.
version
    Version level of the operating system.
machine
    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.

RETURN VALUES
The 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 error.

ERRORS
The uname() function may fail and set errno for any of the errors specified for the library function sysctl(2).

SEE ALSO
uname(1), sysctl(2)

STANDARDS
The uname() function conforms to p1003.1-88.

HISTORY
The uname() function first appeared in PWB/UNIX 1.0 and was reimplemented for 4.4BSD.