NAME
gethostname,
sethostname —
get/set name of current host
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
gethostname(
char
*name,
size_t
namelen);
int
sethostname(
const
char *name,
size_t
namelen);
DESCRIPTION
gethostname() returns the standard host name for the current
machine, as previously set by
sethostname(). The parameter
namelen specifies the size of the
name array. The returned name is null-terminated unless
insufficient space is provided.
sethostname() sets the name of the host machine to be
name, which has length
namelen.
This call is restricted to the super-user and is normally used only when the
system is bootstrapped.
RETURN VALUES
If the call succeeds a value of 0 is returned. If the call fails, a value of -1
is returned and an error code is placed in the global location
errno.
ERRORS
If the
gethostname() or
sethostname()
functions fail, they will set
errno for any of the
errors specified for the routine
sysctl(3).
SEE ALSO
gethostid(3),
sysctl(3),
sysctl(8)
STANDARDS
The
gethostname() function conforms to
X/Open
Portability Guide Issue 4, Version 2 (“XPG4.2”).
HISTORY
The
gethostname function call appeared in
4.2BSD.
BUGS
Host names are limited to
MAXHOSTNAMELEN
(from
⟨
sys/param.h⟩) characters including
null-termination, currently 256.