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Man Pages
explain_gethostbyname_or_die(3) FreeBSD Library Functions Manual explain_gethostbyname_or_die(3)

explain_gethostbyname_or_die - get host address by host name and report errors

#include <libexplain/gethostbyname.h>

struct hostent *explain_gethostbyname_or_die(const char *name);
struct hostent *explain_gethostbyname_on_error(const char *name);

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

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

name
The name, exactly as to be passed to the gethostbyname(3) system call.

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

The explain_gethostbyname_on_error function always returns the value return by the wrapped gethostbyname(3) system call.

The explain_gethostbyname_or_die function is intended to be used in a fashion similar to the following example:
struct hostent *result = explain_gethostbyname_or_die(name);

gethostbyname(3)
get host address given host name
explain_gethostbyname(3)
explain gethostbyname(3) errors
exit(2)
terminate the calling process

libexplain version 1.3
Copyright (C) 2013 Peter Miller

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