Provided by: libexplain-dev_1.4.D001-8_amd64
explain_gethostid_or_die - get the unique identifier of the current host and report errors
#include <libexplain/gethostid.h> long explain_gethostid_or_die(void); long explain_gethostid_on_error(void);
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.
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.
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();
gethostid(3) get the unique identifier of the current host explain_gethostid(3) explain gethostid(3) errors exit(2) terminate the calling process
libexplain version 1.4 Copyright (C) 2013 Peter Miller explain_gethostid_or_die(3)