NAME

gethostname, sethostname − get/set name of current host

SYNOPSIS

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

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

DESCRIPTION

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.

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 int 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 was not the super-user. 

NOTE

Two versions of gethostname may be accessed.  The first version is the proprietary CX system call which directly accesses the kernel.  The other version is defined in the 88open Object Compatibility Standard Networking Supplement (OCSNS) which is implemented within the C library and accesses the kernel only through system calls defined in the 88open Binary Compatibility Standard (BCS).  The OCSNS version is accessed through specific OCS options passed to cc(1) and/or ld(1). 

SEE ALSO

gethostid(2)

BUGS

Host names are limited to 255 characters. 

CX/UX Programmer’s Reference Manual