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<h3>GETHOSTNAME(2)      Linux Programmer's Manual      GETHOSTNAME(2)

</h3>       gethostname, sethostname - get/set host name

</h3>       #include &lt;unistd.h&gt;

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

</h3>       These  functions  are used to access or to change the host
       name of the current processor.

</h3>       On success, zero is returned.  On error, -1  is  returned,
       and errno is set appropriately.

</h3>       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.

</h3>       POSIX.1  does  not  define  these  functions,  but ISO/IEC
       9945-1:1990 mentions them in B.4.4.1.

</h3>       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).

</h3>       Under  Linux/Alpha,  gethostname  is a system call.  Under
       Linux/i386, gethostname  is  implemented  at  the  library
       level by calling uname(2).

<a href=getdomainname.htm>getdomainname</a>, 
<a href=setdomainname.htm>setdomainname</a>, 
<a href=uname.htm>uname</a>, 

<h3>Linux 1.3.6                22 July 1995                         1

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