gethostname

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    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,

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    Linux 1.3.6                22 July 1995                         1

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