UNAME(3) BSD Library Functions Manual UNAME(3)NAMEuname — get system identification
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/utsname.h>
int
uname(struct utsname *name);
DESCRIPTION
The uname() function stores NUL-terminated strings of information identi‐
fying 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.
RETURN VALUES
The uname() function returns the value 0 if successful; otherwise the
value -1 is returned and the global variable errno is set to indicate the
error.
ENVIRONMENT
UNAME_s If the environment variable UNAME_s is set, it will override the
sysname member.
UNAME_r If the environment variable UNAME_r is set, it will override the
release member.
UNAME_v If the environment variable UNAME_v is set, it will override the
version member.
UNAME_m If the environment variable UNAME_m is set, it will override the
machine member.
ERRORS
The uname() function may fail and set errno for any of the errors speci‐
fied for the library functions sysctl(3).
SEE ALSOuname(1), sysctl(3)STANDARDS
The uname() function conforms to IEEE Std 1003.1-1988 (“POSIX.1”).
HISTORY
The uname() function first appeared in 4.4BSD.
BSD December 2, 2005 BSD
