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@(#)gethostname.3 6.5 (Berkeley) 05/18/89

C 5 gethostname, sethostname - get/set name of current host

gethostname(name, namelen)
char *name;
int namelen;

sethostname(name, namelen)
char *name;
int namelen;

Gethostname returns the standard host name 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 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.

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. The following errors may be returned by these calls:

15 [EFAULT] The name or namelen parameter gave an invalid address.

15 [EPERM] The caller tried to set the hostname and was not the super-user.

gethostid(2) Host names are limited to MAXHOSTNAMELEN (from <sys/param.h> ) characters, currently 64.