HP 9000 Series 300 Tutorials Manual page 185

142 /* GET USER SUPPLIED OPTIONS AND PRINTER FILE NAME */
143 while «i
=
getopt(argc, argv, Ib:t:p:D"))
!=
EOF) {
144 switch (i) {
145 /* set the buffer size to output to printer */
146 case 'b': if «bufsz
=
atoi(optarg))
<=
0) errflg++;
147 break;
148
149 /* get the new timeout value in seconds */
150 case 't': if «timeout
=
atoi(optarg)) < 0) errflg++;
151 break;
152
153 /* Set the parallel poll pmask (mostly for debugging) */
154 case 'p': if «pmask[O]
=
atoi(optarg)) < 0) errflg++;
155 break;
156
157 case 'D': Debug++; break;
158
159 case '1': errflg++;break;
160 }
161 }
162 /* get printer dev if supplied */
163 if (optind < argc)
164 strcpy(ptr_dev, argv[optind]);
165
166 if (errflg) {
167 fprintf(stderr, "usage: %s [-bbufsz -ttmout] [printer_dev]\n", procnam);
168 fprintf(stderr, "-b bufsz > Output buf size to printer (%d)\n", bufsz);
169 fprintf(stderr, lI_t tmout > Max seconds to output buffer (%d)\n",
timeout) ;
170 fprintf(stderr, "printer_dev> Printer device file (%s)\n", ptr_dev);
171 fprintf(stderr, "_ p ppoll_mask > Parallel poll mask
(Ox%02x)\n",pmask[0]);
172 exit(2);
173 }
174 /* get memory for the output buffer */
175 outbuf
=
(unsigned char *)malloc (bufsz + 4);
176 /*
177 NOTE: Printer device file (/dev/lp) is used only to get printer select
178 code and HP-IB bus address. This is because attention-true (ATN)
179 requests can only be sent to an "HP-IB raw bus device file". Therefore
180 after getting the SC and BA we will use a "HP-IB raw bus device file" to
181 do all the work, but it must exist with a name similar to the printer
182 device; i.e. "/dev/lp" is changed to l/dev/lp_07", where the "07" is the
183 select code.
184 */
OIL Programming Example 0-5