x11r4 man page for gethostname

gethostname(3C)                                            Standard C Library Functions                                            gethostname(3C)

NAME
       gethostname, sethostname - get or set name of current host

SYNOPSIS
       #include <unistd.h>

       int gethostname(char *name, int namelen);

       int sethostname(char *name, int namelen);

DESCRIPTION
       The gethostname() function returns the standard host name for the current processor, as previously set by sethostname(). The  namelen argu-
       ment specifies the size of the array pointed to by name. The returned name is null-terminated unless insufficient space is provided.

       The sethostname() function sets the name of the host machine to be name, which has length namelen. This call is restricted to the superuser
       and is normally used only when the system is bootstrapped.

       Host names are limited to MAXHOSTNAMELEN characters, currently 256, defined in the <netdb.h> header.

RETURN VALUES
       Upon successful completion, gethostname() and sethostname() return 0. Otherwise, they return -1 and set errno to indicate the error.

ERRORS
       The gethostname() and sethostname() functions will fail if:

       EFAULT   The name or namelen argument gave an invalid address.

       The sethostname() function will fail if:

       EPERM    The {PRIV_SYS_ADMIN} privilege was not asserted in the effective set of the calling process.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Standard                     |
       +-----------------------------+-----------------------------+
       |MT-Level                     |MT-Safe                      |
       +-----------------------------+-----------------------------+

SEE ALSO
       sysinfo(2), uname(2), gethostid(3C), attributes(5), standards(5)

SunOS 5.10                                                          22 Mar 2004                                                    gethostname(3C)