GETHOSTNAME(3)                 Library Routines                 GETHOSTNAME(3)

NAME

       gethostname, sethostname - get/set name of current host

SYNOPSIS

       #include <unistd.h>

       int gethostname (char *name, int namelen);
       int sethostname (const 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 nor‐
       mally used only when the system is bootstrapped.

RETURN VALUES

       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 loca‐
       tion 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  su‐
                     per-user.

SEE ALSO

       gethostid(3), sysctl(3)

BUGS

       Host  names  are  limited to MAXHOSTNAMELEN (from <sys/param.h) charac‐
       ters, currently 256.

HISTORY

       The sethostname function call appeared in 4.2BSD.



GNO                            25 February 1997                 GETHOSTNAME(3)