explain_gethostid_or_die man page
explain_gethostid_or_die — get the unique identifier of the current host and report errors
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
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();
get the unique identifier of the current host
explain gethostid(3) errors
terminate the calling process
libexplain version 1.4
Copyright (C) 2013 Peter Miller