explain_gethostid_or_die man page

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

Referenced By

explain(3), explain_gethostid(3).