int explain_snprintf_or_die(char *data, size_t data_size, const char
*format);
int explain_snprintf_on_error(char *data, size_t data_size, const char
*format);
DESCRIPTION
The explain_snprintf_or_die function is used to call the
snprintf(3) system call. On failure an explanation will be printed
to stderr, obtained from the explain_snprintf(3) function,
and then the process terminates by calling exit(EXIT_FAILURE).
The explain_snprintf_on_error function is used to call the
snprintf(3) system call. On failure an explanation will be printed
to stderr, obtained from the explain_snprintf(3) function,
but still returns to the caller.
data
The data, exactly as to be passed to the snprintf(3) system call.
data_size
The data_size, exactly as to be passed to the snprintf(3) system
call.
format
The format, exactly as to be passed to the snprintf(3) system call.
RETURN VALUE
The explain_snprintf_or_die function only returns on success, see
snprintf(3) for more information. On failure, prints an explanation
and exits, it does not return.
The explain_snprintf_on_error function always returns the value
return by the wrapped snprintf(3) system call.
EXAMPLE
The explain_snprintf_or_die function is intended to be used in a
fashion similar to the following example:
int result = explain_snprintf_or_die(data, data_size, format);