xenial (3) explain_gethostid_or_die.3.gz

NAME

       explain_gethostid_or_die - get the unique identifier of the current host and report errors

SYNOPSIS

       #include <libexplain/gethostid.h>
       long explain_gethostid_or_die(void);
       long explain_gethostid_on_error(void);

DESCRIPTION

       The  explain_gethostid_or_die  function  is  used  to  call  the  gethostid(3) system call. On failure an
       explanation will be printed to stderr, obtained from the  explain_gethostid(3)  function,  and  then  the
       process terminates by calling exit(EXIT_FAILURE).

       The  explain_gethostid_on_error  function  is  used  to  call the gethostid(3) system call. On failure an
       explanation will be printed to stderr, obtained from the explain_gethostid(3) function, but still returns
       to the caller.

RETURN VALUE

       The  explain_gethostid_or_die function only returns on success, see gethostid(3) for more information. On
       failure, prints an explanation and exits, it does not return.

       The explain_gethostid_on_error function always returns the  value  return  by  the  wrapped  gethostid(3)
       system call.

EXAMPLE

       The  explain_gethostid_or_die  function  is  intended  to  be  used in a fashion similar to the following
       example:
              long result = explain_gethostid_or_die();

SEE ALSO

       gethostid(3)
               get the unique identifier of the current host

       explain_gethostid(3)
               explain gethostid(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                                     explain_gethostid_or_die(3)