GETHOSTNAME
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
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.
NAME
gethostname
--- get name of current host
SYNOPSIS
#include <unistd.h>
int gethostname(char *name, size_t namelen);
DESCRIPTION
The
gethostname()
function shall return the standard host name for the current machine.
The
namelen
argument shall specify the size of the array pointed to by the
name
argument. The returned name shall be null-terminated, except that if
namelen
is an insufficient length to hold the host name, then the returned name
shall be truncated and it is unspecified whether the returned name is
null-terminated.
Host names are limited to
{HOST_NAME_MAX}
bytes.
RETURN VALUE
Upon successful completion, 0 shall be returned; otherwise, -1 shall
be returned.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
gethostid(),
uname()
The Base Definitions volume of POSIX.1-2017,
<unistd.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
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.opengroup.org/unix/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 .