explain_gethostname_or_die(3)

NAME

explain_gethostname_or_die - get/set hostname and report errors

SYNOPSIS

#include <libexplain/gethostname.h>
void explain_gethostname_or_die(char *data, size_t data_size);
intexplain_gethostname_on_error(char *data, size_t data_size);

DESCRIPTION

The explain_gethostname_or_die function is used to call the gethostname(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_gethostname(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_gethostname_on_error function is used to call the gethostname(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_gethostname(3) function, but still returns to the caller.

data The data, exactly as to be passed to the gethostname(2) system

call.

data_size

The data_size, exactly as to be passed to the gethostname(2) system call.

RETURN VALUE

The explain_gethostname_or_die function only returns on success, see gethostname(2) for more information. On failure, prints an explanation and exits, it does not return.

The explain_gethostname_on_error function always returns the value return by the wrapped gethostname(2) system call.

EXAMPLE

The explain_gethostname_or_die function is intended to be used in a fashion similar to the following example:

explain_gethostname_or_die(data, data_size);

SEE ALSO

gethostname(2)

get/set hostname

explain_gethostname(3)

explain gethostname(2) errors

exit(2) terminate the calling process

COPYRIGHT

libexplain version 0.37
Copyright (C) 2009 Peter Miller

explain_gethostname_or_die(3)