Man page - explain_gethostid_or_die(3)

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Manual

explain_gethostid_or_die

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLE
SEE ALSO
COPYRIGHT

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();