|GETHOSTNAME(3)||Library Functions Manual||GETHOSTNAME(3)|
sethostname — get/set name
of current host
char *name, size_t
gethostname() function returns the
standard host name for the current machine, as previously set by
sethostname(). The parameter
namelen specifies the size of the
name array. If insufficient space is provided, the
returned name is truncated. The returned name is always NUL terminated. If
no space is provided, an error is returned.
sethostname() sets the name of the host
machine to be name, which has length
namelen. This call is restricted to the superuser and
is normally used only when the system is bootstrapped.
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 variable errno.
The following errors may be returned by these calls:
gethostname() function call conforms
to X/Open Portability Guide Issue 4,
Version 2 (“XPG4.2”).
gethostname() function call appeared
Host names are limited to
characters, currently 256. This includes the terminating NUL character. Note
that the corresponding POSIX definition
not include the terminating NUL character.
If the buffer passed to
MAXHOSTNAMELEN, other operating systems
may not guarantee termination with NUL.
|September 4, 2015||OpenBSD-6.1|