Section: POSIX Programmer's Manual (3P)
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
--- get the name of the current system
int uname(struct utsname *name);
function shall store information identifying the current system in the
structure pointed to by
function uses the
structure defined in
function shall return a string naming the current system in the
shall contain the name of this node within an implementation-defined
communications network. The arrays
shall further identify the operating system. The array
shall contain a name that identifies the hardware that the system
is running on.
The format of each member is implementation-defined.
Upon successful completion, a non-negative value shall be returned.
Otherwise, -1 shall be returned and
set to indicate the error.
No errors are defined.
The following sections are informative.
The inclusion of the
member in this structure does not imply that it is sufficient
information for interfacing to communications networks.
The values of the structure members are not constrained to have any
relation to the version of this volume of POSIX.1-2008 implemented in the operating
system. An application should instead depend on _POSIX_VERSION
and related constants defined in
This volume of POSIX.1-2008 does not define the sizes of the members of the structure
and permits them to be of different sizes, although most
implementations define them all to be the same size: eight bytes plus
one byte for the string terminator. That size for
is not enough for use with many networks.
function originated in System III, System V, and related
and it does not exist in Version 7 or
4.3 BSD. The values it returns are set at system compile time in those
4.3 BSD has
which return a symbolic name and a numeric value, respectively. There
functions that are used to set the values the other two functions
return. The former functions are included in this specification, the
latter are not.
The Base Definitions volume of POSIX.1-2008,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
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