gethostname(3) - NetBSD Manual Pages

GETHOSTNAME(3)            NetBSD Programmer's Manual            GETHOSTNAME(3)


NAME

     gethostname, sethostname - get/set name of current host


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <unistd.h>

     int
     gethostname(char *name, size_t namelen);

     int
     sethostname(const char *name, size_t 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 in-
     sufficient 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 normal-
     ly used only when the system is bootstrapped.


RETURN VALUES

     If the call succeeds a value of 0 is returned.  If the call fails, a val-
     ue 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 super-
                   user.


SEE ALSO

     sysctl(3), gethostid(3), sysctl(8)


STANDARDS

     The gethostname() function conforms to X/Open Portability Guide Issue 4
     Version 2 (``XPG4.2'').


BUGS

     Host names are limited to MAXHOSTNAMELEN (from <sys/param.h>) characters
     including null-termination, currently 256.


HISTORY

     The gethostname function call appeared in 4.2BSD.

NetBSD 1.5                       June 4, 1993                                1