DragonFly On-Line Manual Pages
GETDOMAINNAME(3) DragonFly Library Functions Manual GETDOMAINNAME(3)
getdomainname, setdomainname -- get/set domain name of current host
Standard C Library (libc, -lc)
getdomainname(char *name, int namelen);
setdomainname(const char *name, int namelen);
Getdomainname() returns the standard domain name for the current proces-
sor, as previously set by setdomainname(). The parameter namelen speci-
fies the size of the name array. The returned name is null-terminated
unless insufficient space is provided.
Setdomainname() sets the domain 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.
Upon successful completion, the value 0 is returned; otherwise the
value -1 is returned and the global variable errno is set to indicate the
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
gethostid(3), gethostname(3), sysctl(3)
The getdomainname() function call appeared in 4.2BSD.
Domain names are limited to MAXHOSTNAMELEN (from <sys/param.h>) charac-
ters, currently 256.
DragonFly 5.1 May 6, 1994 DragonFly 5.1