ssize_t explain_writev_or_die(int fildes, const struct iovec *data, int
data_size);
ssize_t explain_writev_on_error(int fildes, const struct iovec *data, int
data_size);
DESCRIPTION
The explain_writev_or_die function is used to call the
writev(2) system call. On failure an explanation will be printed to
stderr, obtained from the explain_writev(3) function, and
then the process terminates by calling exit(EXIT_FAILURE).
The explain_writev_on_error function is used to call the
writev(2) system call. On failure an explanation will be printed to
stderr, obtained from the explain_writev(3) function, but
still returns to the caller.
fildes
The fildes, exactly as to be passed to the writev(2) system call.
data
The data, exactly as to be passed to the writev(2) system call.
data_size
The data_size, exactly as to be passed to the writev(2) system
call.
RETURN VALUE
The explain_writev_or_die function only returns on success, see
writev(2) for more information. On failure, prints an explanation
and exits, it does not return.
The explain_writev_on_error function always returns the value
return by the wrapped writev(2) system call.
EXAMPLE
The explain_writev_or_die function is intended to be used in a
fashion similar to the following example:
ssize_t result = explain_writev_or_die(fildes, data, data_size);