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sethostname (3)
  • sethostname (2) ( Русские man: Системные вызовы )
  • sethostname (2) ( Linux man: Системные вызовы )
  • >> sethostname (3) ( FreeBSD man: Библиотечные вызовы )

  • BSD mandoc
     

    NAME

    
    
    gethostname
    
     
    sethostname
    
     - get/set name of current host
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <unistd.h>
    int gethostname (char *name size_t namelen);
    int sethostname (const char *name int namelen);
     

    DESCRIPTION

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

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

    Host names are limited to Br q Dv HOST_NAME_MAX characters, not including the trailing null, currently 255.  

    RETURN VALUES

    Rv -std  

    ERRORS

    The following errors may be returned by these calls:

    Bq Er EFAULT
    The Fa name or Fa namelen argument gave an invalid address.
    Bq Er ENAMETOOLONG
    The current host name is longer than Fa namelen . (For gethostname ();
    only.)
    Bq Er EPERM
    The caller tried to set the host name and was not the super-user.

     

    SEE ALSO

    sysconf(3), sysctl(3)  

    STANDARDS

    The gethostname ();
    function conforms to St -p1003.1-2001 . Callers should be aware that Br q Dv HOST_NAME_MAX may be variable or infinite, but is guaranteed to be no less than Br q Dv _POSIX_HOST_NAME_MAX . On older systems, this limit was defined in the non-standard header    #include <sys/param.h>
    as MAXHOSTNAMELEN and counted the terminating null. The sethostname ();
    function and the error returns for gethostname ();
    are not standardized.  

    HISTORY

    The gethostname ();
    function appeared in BSD 4.2 The Fa namelen argument to gethostname ();
    was changed to Vt size_t in Fx 5.2 for alignment with St -p1003.1-2001 .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    STANDARDS
    HISTORY


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