If _c_a_t_a_l_o_g does not exist in the current locale (identified
by the _LLLL_CCCC______MMMM_EEEE_SSSS_SSSS_AAAA_GGGG_EEEE_SSSS or _LLLL_AAAA_NNNN_GGGG environment variables), or if
_m_s_g_i_d is out of bounds, _llll_ffff_mmmm_tttt will attempt to retrieve the
message from the C locale. If this second retrieval fails,
_llll_ffff_mmmm_tttt uses the _f_o_r_m_a_t string as passed on the command line.
_llll_ffff_mmmm_tttt will output _MMMM_eeee_ssss_ssss_aaaa_gggg_eeee _nnnn_oooo_tttt _ffff_oooo_uuuu_nnnn_dddd_!!!!_!!!!_\\\\_nnnn as the _f_o_r_m_a_t string
if _c_a_t_a_l_o_g is not a valid catalog name, or if _m_s_g_i_d is not a
valid number as defined above.
_----_llll _l_a_b_e_l Specify the label string to be displayed with the message
(for example, _""""_UUUU_XXXX_::::_cccc_aaaa_tttt_""""). _l_a_b_e_l is a character string no more
than 25 characters in length; it will be automatically
suffixed with a colon (_::::). When unspecified, no label is
displayed as part of the message.
_----_ssss _s_e_v_e_r_i_t_y Specify the severity string to be displayed with the message.
Acceptable strings include the standard severities in either
their print string (that is, _HHHH_AAAA_LLLL_TTTT, _EEEE_RRRR_RRRR_OOOO_RRRR, _IIII_NNNN_FFFF_OOOO, _WWWW_AAAA_RRRR_NNNN_IIII_NNNN_GGGG, and
_""""_TTTT_OOOO _FFFF_IIII_XXXX_"""") or keyword (that is, _hhhh_aaaa_llll_tttt, _eeee_rrrr_rrrr_oooo_rrrr, _iiii_nnnn_ffff_oooo, _wwww_aaaa_rrrr_nnnn, and
_aaaa_cccc_tttt_iiii_oooo_nnnn) forms, or any other user-defined string. A user-
defined string will be assigned the integer severity value of
5. The severity will be suffixed with a colon (_::::). The
_EEEE_RRRR_RRRR_OOOO_RRRR severity will be used if no severity is specified.