GETHOSTNAME(2)      Linux Programmer's Manual      GETHOSTNAME(2)


NAME
       gethostname, sethostname - get/set host name

SYNOPSIS
       #include <unistd.h>

       int gethostname(char *name, size_t len);
       int sethostname(const char *name, size_t len);

DESCRIPTION
       These  functions  are used to access or to change the host
       name of the current processor.

RETURN VALUE
       On success, zero is returned.  On error, -1  is  returned,
       and errno is set appropriately.

ERRORS
       EINVAL len  is negative or, for sethostname, len is larger
              than the maximum allowed size, or, for  gethostname
              on Linux/i386, len is smaller than the actual size.

       EPERM  For sethostname, the caller was not the  superuser.

       EFAULT name is an invalid address.

CONFORMING TO
       POSIX.1  does  not  define  these  functions,  but ISO/IEC
       9945-1:1990 mentions them in B.4.4.1.

BUGS
       Some other  implementations  of  gethostname  successfully
       return len bytes even if name is longer.  Linux/Alpha com-
       plies with this behaviour.  Linux/i386,  however,  returns
       EINVAL in this case (as of DLL 4.6.27 libraries).

NOTES
       Under  Linux/Alpha,  gethostname  is a system call.  Under
       Linux/i386, gethostname  is  implemented  at  the  library
       level by calling uname(2).

SEE ALSO

getdomainname, setdomainname, uname,

Linux 1.3.6                22 July 1995                         1