HP-UX Reference (11i v1 05/09) - 2 System Calls (vol 5)

u
uname(2) uname(2)
NAME
uname(), setuname() - get information about computer system; set node name (system name)
SYNOPSIS
#include <sys/utsname.h>
int uname(struct utsname *name);
int setuname(const char *name, size_t namelen);
DESCRIPTION
uname()
The uname() system call places information identifying the computer system in the
utsname structure
pointed to by name.
The
utsname structure, defined in
<sys/utsname.h>, is set up as follows:
#define UTSLEN 9
#define SNLEN 15
char sysname[UTSLEN];
char nodename[UTSLEN];
char release[UTSLEN];
char version[UTSLEN];
char machine[UTSLEN];
char idnumber[SNLEN];
Each field is a null-terminated string.
The sysname field contains the name of the operating system, HP-UX on standard HP-UX systems.
The nodename field contains the name by which the computer system is known in a communications net-
work.
The release field contains the release identifier of the operating system, such as A.09.01
.
The
version field contains additional information about the operating system. This value can change in
future releases. The first character of the version field identifies the license level:
A Two-user system
B 16-user system
C 32-user system
D 64-user system
E 8-user system
U 128-user, 256-user, or unlimited-user system
The machine field contains the hardware and model identifiers of the computer system.
The idnumber field contains a unique identification number within that class of hardware, possibly a
hardware or software serial number. This field contains a null string if there is no identification number.
setuname()
The setuname() system call sets the node name (system name), as returned in the nodename field of
the utsname structure, to name, which has a length of namelen characters. This is usually executed by
/sbin/init.d/hostname at system boot time. Names are limited to UTSLEN - 1 characters;
UTSLEN is defined in <sys/utsname.h>.
RETURN VALUE
uname() and setuname() return the following values:
n Successful completion. n is a nonnegative value.
-1 Failure. errno is set to indicate the error.
ERRORS
If uname() or setuname() fails, errno is set to one of the following values.
[EFAULT] name points to an illegal address. The reliable detection of this error is implementation
dependent.
HP-UX 11i Version 1: September 2005 − 1 − Hewlett-Packard Company Section 2−−457