gethostname(2)gethostname(2)NAME
gethostname, sethostname - get/set name of current host
C SYNOPSIS
#include <unistd.h>
int gethostname (char *name, size_t namelen);
int sethostname (char *name, int namelen);
DESCRIPTION
Gethostname returns the standard hostname for the current processor, as
previously set by sethostname. The parameter namelen specifies the size
of the name array. The returned name is null-terminated and truncated if
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 superuser and is normally
used only when the system is bootstrapped.
RETURN VALUE
If the call succeeds a value of 0 is returned. If the call fails, then a
value of -1 is returned and an error code is placed in the global
location errno.
ERRORS
The following errors may be returned by these calls:
[EFAULT] The name or namelen parameter gave an invalid address.
[EPERM] The caller tried to set the hostname and was not the
superuser.
[EINVAL] The namelen parameter was too large.
SEE ALSOgethostid(2)BUGS
Hostnames are limited to MAXHOSTNAMELEN (from <sys/param.h>) characters,
currently 256.
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