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+'\" et
+.TH UNAME "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH PROLOG
+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.
+
+.SH NAME
+uname
+\(em get the name of the current system
+.SH SYNOPSIS
+.LP
+.nf
+#include <sys/utsname.h>
+.P
+int uname(struct utsname *\fIname\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIuname\fR()
+function shall store information identifying the current system in the
+structure pointed to by
+.IR name .
+.P
+The
+\fIuname\fR()
+function uses the
+.BR utsname
+structure defined in
+.IR <sys/utsname.h> .
+.P
+The
+\fIuname\fR()
+function shall return a string naming the current system in the
+character array
+.IR sysname .
+Similarly,
+.IR nodename
+shall contain the name of this node within an implementation-defined
+communications network. The arrays
+.IR release
+and
+.IR version
+shall further identify the operating system. The array
+.IR machine
+shall contain a name that identifies the hardware that the system
+is running on.
+.P
+The format of each member is implementation-defined.
+.SH "RETURN VALUE"
+Upon successful completion, a non-negative value shall be returned.
+Otherwise, \(mi1 shall be returned and
+.IR errno
+set to indicate the error.
+.SH ERRORS
+No errors are defined.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+The inclusion of the
+.IR nodename
+member in this structure does not imply that it is sufficient
+information for interfacing to communications networks.
+.SH RATIONALE
+The values of the structure members are not constrained to have any
+relation to the version of this volume of POSIX.1\(hy2008 implemented in the operating
+system. An application should instead depend on _POSIX_VERSION
+and related constants defined in
+.IR <unistd.h> .
+.P
+This volume of POSIX.1\(hy2008 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
+.IR nodename
+is not enough for use with many networks.
+.P
+The
+\fIuname\fR()
+function originated in System III, System V, and related
+implementations,
+and it does not exist in Version 7 or
+4.3 BSD. The values it returns are set at system compile time in those
+historical implementations.
+.P
+4.3 BSD has
+\fIgethostname\fR()
+and
+\fIgethostid\fR(),
+which return a symbolic name and a numeric value, respectively. There
+are related
+\fIsethostname\fR()
+and
+\fIsethostid\fR()
+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.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<sys_utsname.h>\fP"
+.SH COPYRIGHT
+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
+http://www.unix.org/online.html .
+
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .